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  Subjects -> ENGINEERING (Total: 2267 journals)
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ENGINEERING (1196 journals)                  1 2 3 4 5 6 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Full-text available via subscription   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 15)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 216)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 1)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
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Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access  
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
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Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 5)
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ASEE Prism     Full-text available via subscription   (Followers: 2)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 7)
Asian Journal of Control     Hybrid Journal  
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Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 3)
Batteries     Open Access   (Followers: 3)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
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BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 9)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
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Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 13)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 5)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
Coatings     Open Access   (Followers: 2)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Composite Interfaces     Hybrid Journal   (Followers: 5)
Composite Structures     Hybrid Journal   (Followers: 252)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 176)
Composites Part B : Engineering     Hybrid Journal   (Followers: 224)
Composites Science and Technology     Hybrid Journal   (Followers: 164)
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Control and Dynamic Systems     Full-text available via subscription   (Followers: 7)
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Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 24)
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CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)

        1 2 3 4 5 6 | Last

Journal Cover Corrosion Science
  [SJR: 1.931]   [H-I: 130]   [24 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0010-938X
   Published by Elsevier Homepage  [3032 journals]
  • Transition from superhydrophilic to superhydrophobic state of laser
           textured stainless steel surface and its effect on corrosion resistance
    • Abstract: Publication date: Available online 18 April 2017
      Source:Corrosion Science
      Author(s): Uroš Trdan, Matej Hočevar, Peter Gregorčič
      This work investigates the evolution from superhydrophilic to superhydrophobic surface state on corrosion behaviour of SS316L produced by Nd:YAG nanosecond direct laser texturing (DLT). Results confirm perfect correlation among wettability and corrosion, hence superhydrophobic surface with a contact angle of 168±3.0° reflects in enhanced passivity, lower anodic dissolution and corrosion current reduction. Characterization of the corrosion attack by 3D microscopy reveals high sensitivity of superhydrophilic surfaces on corrosion propagation direction in regard to the laser beam passage (90°/0°). However, this trend completely diminishes with superhydrophobic development. Further, DLT also completely prohibits intergranular corrosion detected with the non-processed sample.
      Graphical abstract image

      PubDate: 2017-04-19T04:14:45Z
       
  • Eliminating detrimental effect of cold working on pitting corrosion
           resistance in high nitrogen austenitic stainless steels
    • Abstract: Publication date: Available online 15 April 2017
      Source:Corrosion Science
      Author(s): Qingchuan Wang, Bingchun Zhang, Yibin Ren, Ke Yang
      The detrimental effect of cold working on pitting corrosion resistance was surprisingly found totally eliminated in high nitrogen stainless steels (HNS) with higher nitrogen content (0.92wt.%) by electrochemical tests in chloride solution. Inclusions morphology and microstructure of cold-worked HNS were investigated. Then the passive film on HNS was analyzed by secondary ion mass spectroscopy (SIMS). For the first time nitrogen enrichment as a form of short range ordered [CrN] was observed in the chromium nitride layer of passive film on HNS. A possible reaction involving nitrogen enrichment is proposed to elucidate this exceptional behavior of corrosion resistance for HNS.
      Graphical abstract image

      PubDate: 2017-04-19T04:14:45Z
       
  • Hot corrosion of arc ion plating NiCrAlY and sputtered nanocrystalline
           coatings on a nickel-based single-crystal superalloy
    • Abstract: Publication date: Available online 14 April 2017
      Source:Corrosion Science
      Author(s): Jinlong Wang, Minghui Chen, Yuxian Cheng, Lanlan Yang, Zebin Bao, Li Liu, Shenglong Zhu, Fuhui Wang
      Hot corrosion in sulfate salt at 850°C of three metallic coatings is investigated comparatively. The NiCrAlY coating loses its protectiveness after 200h corrosion. Its oxide scale spalls off partly and becomes porous as a consequence of basic fluxing. The nanocrystalline coating (SN) performs better than the NiCrAlY one, but its scale is porous as well. Oxidation and/or sulfidation of Ta account for the formation of pores. The yttrium modified nanocrystalline coating (SNY) provides the highest corrosion resistance. Yttrium completely inhibits oxidation and sulfidation of Ta. Its scale is intact and adherent, and exclusively composted of alumina.

      PubDate: 2017-04-19T04:14:45Z
       
  • Effects of hydrogen on corrosion of pure Ni in high temperature water
    • Abstract: Publication date: Available online 13 April 2017
      Source:Corrosion Science
      Author(s): Jian Xu, Zihao Wang, Tetsuo Shoji
      A specially designed cyclic hydrogenated and oxygenated water chemistry in a high temperature aqueous environment was used, and the consequential corrosion behavior of pure Ni was investigated by in situ electric/electrochemical measurements and ex situ surface oxides analyses. The penetrated hydrogen in Ni from the hydrogenated water can enhance oxidation taking place in the subsequent oxygenated water. Ni oxide formed in oxygenated water can be reduced in the following hydrogenated water with a much slower reduction rate than that in gaseous environments. Practical implications of the phenomena in structural materials in nuclear power plants were also discussed.

      PubDate: 2017-04-19T04:14:45Z
       
  • Ceramic oxide coating formed on beryllium by micro-arc oxidation
    • Abstract: Publication date: Available online 13 April 2017
      Source:Corrosion Science
      Author(s): Shixiong He, Yanlong Ma, Hong Ye, Xiangdong Liu, Zuoyong Dou, Qingdong Xu, Haijun Wang, Pengcheng Zhang
      Beryllium was oxidized at a current density of 10mAcm−2 in a 0.5M Na2CO3 (pH=11.2) electrolyte to understand the micro-arc oxidation (MAO) process. Different oxidation stages were investigated by analysing the voltage–time responses and coating morphology. ‘Electric breakdown’ accompanied by sparks travelling across the metal/electrolyte interface occurs when the voltage rises above a certain point (∼202V), leading to the formation of an off-white ‘ceramic-like’ BeO coating. The MAO coating consists of two layers—an inner barrier layer and an outer porous layer—and shows improved corrosion resistance and insulation properties. XPS and XRD indicate that the coating has a chemical composition of BeO and is crystalline. Further, corrosion resistance and insulation properties of the coating were estimated by EIS analysis.

      PubDate: 2017-04-19T04:14:45Z
       
  • Ablation resistance of supersonic-atmosphere-plasma-spraying ZrC coating
           doped with ZrO2 for SiC-coated carbon/carbon composites
    • Abstract: Publication date: Available online 12 April 2017
      Source:Corrosion Science
      Author(s): Yujun Jia, Hejun Li, Qiangang Fu, Zhigang Zhao, Jiajia Sun
      To improve the ablation resistance of ZrC coating for carbon/carbon (C/C) composites, the C/Zr ratio of the coating was changed by doping ZrO2 using supersonic atmosphere plasma spraying (SAPS). The SAPS ZrC coating with 10vol.% ZrO2 showed a significant improvement on ablation resistance compared with SAPS ZrC coating without ZrO2 and could protect C/C composites for more than 90s at heat flux of 2.4MW/m2. The oxycarbides in the coating attenuated the destructiveness from gas products. The decreased C/Zr ratio and increased relative content of ZrCxOy in the multiphase coating reduced the CO evolution and contributed to the improvement on ablation resistance. An optimal oxycarbide was ZrCx (0.61< x <1.0, y =0) based on thermodynamic calculation. Excessive doping of ZrO2 deteriorated the ablation resistance due to many potential oxygen penetration paths produced during heating and cooling and the probably increased vaporization of the coating.

      PubDate: 2017-04-12T15:26:00Z
       
  • High temperature oxidation kinetics of amorphous silicoboron carbonitride
           monoliths and silica scale growth mechanisms determined by SIMS
    • Abstract: Publication date: Available online 12 April 2017
      Source:Corrosion Science
      Author(s): Bin Liang, Dechang Jia, Yang Miao, Qishuai Zhu, Xingqi Liao, Zhihua Yang, Yu Zhou
      The highly dense, amorphous silicoboron carbonitride (Si-B-C-N) monoliths provide superior oxidation resistance above 1600°C, but the in-depth oxidation kinetics are unknown. Here oxidation kinetics of amorphous Si-B-C-N monoliths was investigated by one-step oxidation (in flowing 16O-rich air) over 1500–1700°C. Coincidently, the growth mechanisms of oxide scales on ceramic surfaces were studied by oxidizing ceramics in 18O-rich air followed by 16O where 16O was used as an equivalent isotopic tracer and the distributions of 16O and 18O in oxide scales were determined directly by secondary ion mass spectrometry (SIMS). The thickness changes of silica scales fit well to parabolic rules at 1500°C (32.5μm2 h−1) and 1600°C (86.1μm2 h−1) within 16h, but are irregular at 1700°C. The calculated Arrhenius activation energy is ca. 116kJmol−1 for 1500–1600°C/16h oxidation. The relative concentration profiles of 16O from SIMS analysis indicate growth of oxide scales is mainly by oxygen lattice diffusion inside scales during oxidation of the amorphous Si-B-C-N ceramics.

      PubDate: 2017-04-12T15:26:00Z
       
  • Influence of environment on the development of corrosion product-filled
           paste and a corrosion layer at the steel/concrete interface
    • Abstract: Publication date: Available online 31 March 2017
      Source:Corrosion Science
      Author(s): Yuxi Zhao, Xiaowen Zhang, Weiliang Jin
      Corrosion products at the steel/concrete interface of specimens subjected to different environments were examined. The process of generation of the corrosion product-filled paste (CP), including the corrosion products filling in air voids, was observed. The tiny cracks caused by the artificially accelerated corrosion process were observed to favour CP growth. The thicknesses of CP and the corrosion layer (CL), T CP and T CL were measured, and the T CP − T CL models are established. The T CP − T CL models obtained from this experiment and previous ones are compared, and the influence of environment on the T CP − T CL models is also discussed.

      PubDate: 2017-04-04T16:43:03Z
       
  • The rotating cylinder electrode for studies of corrosion engineering and
           protection of metals—An illustrated review
    • Abstract: Publication date: Available online 31 March 2017
      Source:Corrosion Science
      Author(s): F.C. Walsh, G. Kear, A.H. Nahlé, J.A. Wharton, L.F. Arenas
      The uniform flow generated at moderate rotation speeds, controlled mass transport rate and uniform current distribution make the RCE attractive for turbulent flow studies of corrosion and protection. Controlled flow and mass transport are characterised by peripheral velocity and mass transport coefficient. Important aspects in corrosion include metal dissolution, oxygen reduction, stability of surface oxide films and porosity of protective coatings. Computational studies allow fluid flow, current distribution and mass transport to be simulated; multiphase electrolytes and nanofluids have been experimentally studied over the last decade. Diverse uses of the RCE include cathodic protection, corrosion inhibitors and protective coatings.
      Graphical abstract image

      PubDate: 2017-04-04T16:43:03Z
       
  • New Insight into Atmospheric Alteration of Alkali-Lime Silicate Glasses
    • Abstract: Publication date: Available online 30 March 2017
      Source:Corrosion Science
      Author(s): Fanny Alloteau, Patrice Lehuédé, Odile Majérus, Isabelle Biron, Anaïs Dervanian, Thibault Charpentier, Daniel Caurant
      A mixed alkali lime silicate glass altered in atmospheric conditions (80°C/85%RH, Relative Humidity) for various lengths of time was characterized at all scales. The altered glass forms a hydrated solid phase bearing about 10wt % of H2O in the form of Si-OH groups and molecular water. No alkali depletion was observed after ageing tests. Structural results from 1H, 23Na and 29Si MAS NMR point out the close proximity of Si-OH, H2O and Na+ species. This study gives new insight into the mechanisms of the atmospheric alteration, essential to conservation strategies in industry and cultural heritage.

      PubDate: 2017-04-04T16:43:03Z
       
  • In-situ oxidation and short-time corrosion investigation on strain and
           dislocation during the generation and growth of ZrO2
    • Abstract: Publication date: Available online 30 March 2017
      Source:Corrosion Science
      Author(s): Zhen Wang, Bang-xin Zhou, Bing Chen, Wei Zhu, Bang Wen, Lu Wu, Hong-kui Tang, Zhong-qiang Fang, Qiang Li, Mei-yi Yao
      An In-situ oxidation test and a short time exposure corrosion test of Zircaloy-4 were carried out. A lot of dislocations generated in the nucleation and growth process of ZrO2 are observed. Dislocations will be firstly distributed at the interface of ZrO2. With the growth of m-ZrO2 grains, the number of dislocations at the interface increases. When the grain size of ZrO2 reaches a critical value, the dislocations in the grains of ZrO2 begin to appear. A compressive strain between semi-coherent planes of oxides was detected in a range from −0.3% to −6%.

      PubDate: 2017-04-04T16:43:03Z
       
  • Effect of Cooling Condition on the Intergranular Corrosion Resistance of
           UNS S32506 Duplex Stainless Steel
    • Abstract: Publication date: Available online 30 March 2017
      Source:Corrosion Science
      Author(s): Takayuki Takei, Murotsune Yabe, Fu-Gao Wei
      The effect of cooling condition on the intergranular corrosion resistance of UNS S32506 duplex stainless steel was investigated by means of Huey test and microstructural observation. It was found that quenching at a temperature below 800°C after air cooling at a fixed rate from solutionization temperature enhances the intergranular corrosion rate. No precipitation has been found at all cooling conditions. Formation of Cr-depletion zone on the γ phase side of the α/γ interface due to local chemical change accompanying α-γ phase transformation during air cooling is responsible for the intergranular corrosion degradation of the UNS S32506 duplex stainless steel.

      PubDate: 2017-04-04T16:43:03Z
       
  • Synergistic Effect of Temperature and HCl Concentration on the Degradation
           of AISI 410 Stainless Steel
    • Abstract: Publication date: Available online 30 March 2017
      Source:Corrosion Science
      Author(s): Paul D. Krell, Shengxi Li, Hongbo Cong
      The corrosion behavior of AISI 410 stainless steel was investigated in relatively dilute HCl solutions with different concentrations and temperature levels. General corrosion occurred at pH<1.5 while pitting occurred at 2.25≤pH≤4.25. Important pitting parameters were evaluated as a function of both temperature and HCl concentration. Critical temperature (Tcrit) increased linearly with pH. Below Tcrit, passive film remained largely intact and sporadic metastable pitting initiated from non-metallic inclusions. Above Tcrit, passivity was completely destroyed and black film consisting of oxy-hydroxide and hydrated oxide formed. Sigma-phase particles were found in this steel and remained un-corroded.

      PubDate: 2017-04-04T16:43:03Z
       
  • A versatile dopamine-induced intermediate layer for polyether imides (PEI)
           deposition on magnesium to render robust and high inhibition performance
    • Abstract: Publication date: Available online 29 March 2017
      Source:Corrosion Science
      Author(s): Chunmin Wang, Jun Shen, Fuxing Xie, Bin Duan, Xiong Xie
      Dopamine (DA), with strong adhesion to metal substrate via self-polymerization reaction, was introduced as a versatile template layer for subsequent polyether imide (PEI) deposition to confer a highly robust coating on AZ31 magnesium alloy. The complicated corrosion behaviour of the coating was disclosed and investigated by employing electrochemical impedance spectroscopy (EIS) coupled with equivalent electrical circuits (EECs) analysis. The results showed that the hybrid PEI/PDA coating exhibited evidently higher retardation performance (up to 35 days) after immersing in 3.5wt.% NaCl solution compared to PDA or PEI coated Mg.

      PubDate: 2017-04-04T16:43:03Z
       
  • Combined influence of Be and Ca on improving the high-temperature
           oxidation resistance of the magnesium alloy Mg-9Al-1Zn
    • Abstract: Publication date: Available online 28 March 2017
      Source:Corrosion Science
      Author(s): Qiyang Tan, Ning Mo, Bin Jiang, Fusheng Pan, Andrej Atrens, Ming-Xing Zhang
      The present work showed that the oxidation resistance of Mg-9Al-1Zn at elevated temperatures was improved by combined alloying with Be and Ca. AZ91 alloyed with 20ppm (wt) Be and 0.5wt.% Ca had higher oxidization resistance than that of AZ91 containing 60ppm (wt) Be. The improved oxidation resistance was attributed to (a) the formation of a Be-reinforced compact CaO-MgO composite layer on the alloy surface, and (b) suppressing the grain boundary evaporation of Mg by (i) the elimination of Mg-Al eutectic micro-constituent, and (ii) the increase in thermal stability of the β-Mg17Al12 due to the Ca alloying.
      Graphical abstract image

      PubDate: 2017-04-04T16:43:03Z
       
  • Sulphidation of Au-Ag alloys in the presence of pyrite (experimental data)
    • Abstract: Publication date: Available online 25 March 2017
      Source:Corrosion Science
      Author(s): Galina Palyanova, Konstantin Kokh, Yurii Seryotkin
      Dry annealing of Au-Ag alloys (Au, Au0.56Ag0.44, Au0.35Ag0.65, Au0.19Ag0.81 and Ag), together with pyrite as a source of sulphur, at 450°C was used to study the mechanisms of corrosion and transition of metal forms of noble metals to sulphide forms. In the experiment with Ag plates the silver completely sulphidates to form acanthite Ag2S and pyrite desulphidates to form pyrrhotite Fe1-yS. In the experiments with the Au-Ag plates there also formation of a uytenbogaardtite phase and ennobling of Au-Ag alloys take place. Gold in the absence of silver stabilizes pyrite and prevents its transition to pyrrhotite.

      PubDate: 2017-03-28T14:47:11Z
       
  • Corrosion protection of petroleum pipelines in NaCl solution by
           microcrystalline waxes from waste materials: Electrochemical studies
    • Abstract: Publication date: Available online 25 March 2017
      Source:Corrosion Science
      Author(s): M.A. Deyab, Nermen H. Mohamed, Y.M. Moustafa
      A wax coating was prepared using waste materials (isolated microcrystalline waxes) to protect petroleum pipelines against corrosion in 0.6M NaCl solution. The corrosion protection performance of isolated microcrystalline wax coating was detected by electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) measurements. EIS spectra confirmed that the corrosion of carbon steel in 0.6M NaCl solution significantly inhibited by isolated microcrystalline wax coating. Positive shift of OCP also indicated that the microcrystalline wax acts as a protective coating. The effect of temperature on the performance of isolated microcrystalline wax coating was investigated and discussed.

      PubDate: 2017-03-28T14:47:11Z
       
  • Oxidation of an austenitic stainless steel with or without alloyed
           aluminium in O2+10% H2O environment at 800°C
    • Abstract: Publication date: Available online 21 March 2017
      Source:Corrosion Science
      Author(s): Zhongdi Yu, Minghui Chen, Changbin Shen, Shenglong Zhu, Fuhui Wang
      Oxidation behavior in O2 +10% H2O at 800°C of an austenitic stainless steel with or without aluminum is investigated. The Al-free steel enters into breakaway oxidation stage after only 15h exposure, while the one with 2.7wt% aluminum shows high oxidation resistance. This minor amount of aluminum is lower than the critical content to form an intact alumina scale, but it promotes the formation of a thin Al-rich inner layer which is favor in prohibiting holes formation due to volatilization of CrO2(OH)2 and Kirkendall effect. A compact scale develops and protects the Al-containing steel very well.

      PubDate: 2017-03-28T14:47:11Z
       
  • Corrosion Properties of Nickel-Aluminium Bronze in Natural Seawater −
           Effect of Galvanic Coupling to UNS S31603
    • Abstract: Publication date: Available online 18 March 2017
      Source:Corrosion Science
      Author(s): Hedda Nordby Krogstad, Roy Johnsen
      The corrosion behavior of galvanically coupled Nickel-Aluminium Bronze (NAB) and stainless steel (UNS S31603) during three weeks of exposure to natural seawater has been investigated. The approach included extensive testing of freely exposed NAB and cathodically polarized SS. The results imply that the galvanic current is limited by the cathode efficiency of SS, while the coupled potential is dictated by NAB. It is further reported that cathodic polarization of SS by NAB has a large effect on the cathode efficiency of SS.

      PubDate: 2017-03-21T14:39:42Z
       
  • Effect of exposure angle on the corrosion behavior of X70 steel under
           supercritical CO2 and gaseous CO2 environments
    • Abstract: Publication date: Available online 18 March 2017
      Source:Corrosion Science
      Author(s): Liang Wei, Xiaolu Pang, Meng Zhou, Kewei Gao
      The corrosion behavior of X70 steel with different exposure angles under supercritical CO2 and gaseous CO2 environments were studied. The results showed that the diffusion of the corrosive species in the water droplets in supercritical CO2 phase was more significant than that in aqueous phase, which accelerated the cathodic reactions. The corrosion rate in supercritical CO2 phase was much higher than that in gaseous CO2 phase due to the higher mutual solubility (g/L) of H2O and CO2 in supercritical CO2 phase. Exposure angle significantly affected the corrosion behavior of the steel in supercritical CO2 phase.

      PubDate: 2017-03-21T14:39:42Z
       
  • Corrigendum to “Inhibitory effect of cetyltrimethylammonium bromide on
           the electrochemical migration of tin in thin electrolyte layers containing
           chloride ions” [Corros. Sci. 118 (2017) 190–201]
    • Abstract: Publication date: Available online 18 March 2017
      Source:Corrosion Science
      Author(s): Bokai Liao, Zhenyu Chen, Qubing Qiu, Xingpeng Guo


      PubDate: 2017-03-21T14:39:42Z
       
  • Isolation or corrosion of microporous alumina in contact with various
           CaO-Al2O3-SiO2 slags
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): Lvping Fu, Ao Huang, Pengfei Lian, Huazhi Gu
      Is the microporous structure able to protect lightweight alumina aggregates against corrosion of various molten slags? The effects of the slag compositions and structural parameters of alumina aggregates on their slag resistance behavior were investigated, and a dissolution rate model was proposed to describe the dissolution of alumina in the various molten slags inside the pores. Compared to the apparent porosity, the pore size has a crucial impact on dissolution of the lightweight alumina aggregates in the molten slags. A balance between the alumina dissolution rate and the solid phase precipitation rate should be achieved to form an isolation layer.
      Graphical abstract image

      PubDate: 2017-03-21T14:39:42Z
       
  • Effect of Cu on Corrosion Behavior of Low Alloy Steel under the Simulated
           Bottom Plate Environment of Cargo Oil Tank
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): Xuehui Hao, Junhua Dong, Jie Wei, Ini-Ibehe Nabuk Etim, Wei Ke
      The effect of Cu on the corrosion behavior of low alloy steel under the simulated bottom plate environment of cargo oil tank was investigated by using gravimetric test, SEM, EDS, XPS, XRD and electrochemical measurements. The results indicate that the corrosion resistance of 16MnCu steel was higher than that of 16Mn steel, which was related to the deposition of nano-sized Cu particles on the surface. The deposited Cu might suppress both the anodic dissolution of the ferrite and hydrogen evolution reaction on the cementite, leading to the reduction of the galvanic effect caused by the residual cementite.

      PubDate: 2017-03-21T14:39:42Z
       
  • Copper in ultrapure water, a scientific issue under debate
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): M. Ottosson, M. Boman, P. Berastegui, Y. Andersson, M. Hahlin, M. Korvela, R. Berger
      The corrosion properties of copper in ultrapure water have been studied experimentally by submerging copper samples (99.9999%) in pure water for up to 29 months. The surface was first electropolished at ambient temperature, then exposed to hydrogen gas treatment at 300–400°C, thereby reducing the bulk hydrogen content to 0.03ppm. These copper samples, the water and the glassware were all then subjected to precise chemical analysis. Great care was taken to avoid contamination. After exposure, only ∼6μg/L copper had accumulated in the water phase. Electron spectroscopy could not detect Cu2O or any other oxidation products containing copper.

      PubDate: 2017-03-21T14:39:42Z
       
  • Salt Fog Corrosion Behavior in a Powder-Processed
           Icosahedral-Phase-Strengthened Aluminum Alloy
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): T.J. Watson, M.A. Gordillo, A.T. Ernst, B.A. Bedard, M. Aindow
      The pitting corrosion resistance has been evaluated for a powder-processed Al-Cr-Mn-Co-Zr alloy which contains ≈35% by volume of an icosahedral quasi-crystalline phase and a little Al9Co2 in an Al matrix. ASTM standard salt fog exposure tests show that the alloy exhibits far lower corrosion pit densities and depths than commercial high-strength aerospace Al alloys under the same conditions. Electron microscopy data show that the salt fog exposure leads to the selective oxidation of the face-centered cubic Al matrix around the other phases, and to the development of a porous outer oxide scale.

      PubDate: 2017-03-21T14:39:42Z
       
  • Air-oxidation of FeCoNiCr-based quinary high-entropy alloys at
           700–900°C.
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): Wu Kai, C.C. Li, F.P. Cheng, K.P. Chu, R.T. Huang, L.W. Tsay, J.J. Kai
      The oxidation of three quinary equimolar high-entropy alloys, containing FeCoNiCrAl, FeCoNiCrMn, and FeCoNiCrSi was studied in dry air at 700–900°C. The Mn-containing alloy was single-phase, while both Al- and Si-containing alloys were dual-phase. The oxidation kinetics of all the alloys followed the parabolic rate law, regardless of temperature and alloy composition. The oxidation rates of both Al- and Si-containing alloys were lower than those of the quaternary FeCoNiCr alloy, while those of the Mn-containing alloy went to an opposite direction. Multiple scales formed on the alloys were strongly composition-dependent.

      PubDate: 2017-03-21T14:39:42Z
       
  • Corrosion behaviour of hot-dip Al–Zn–Si and Al–Zn–Si–3Mg
           coatings in NaCl solution
    • Abstract: Publication date: Available online 16 March 2017
      Source:Corrosion Science
      Author(s): Wei Liu, Qian Li, Mou-Cheng Li
      The corrosion behaviour of hot-dip Al–Zn–Si and Al–Zn–Si–3Mg coatings on steel sheets in NaCl solution were investigated by microstructural characterization, weight loss tests, and electrochemical methods Localized corrosion of the Al-rich phase in the Al–Zn–Si coating was observed. The exposure of the intermetallic layer was supposed to present galvanic corrosion and remarkably accelerate the consumption of remnant Al-rich phase. The MgZn2 phase was detected in the interdendritic Zn-rich region of the Al–Zn–Si–3Mg coating. The presence of the MgZn2 and Mg2Si phases contributed to delaying the occurrence of localized corrosion.

      PubDate: 2017-03-21T14:39:42Z
       
  • The inhibitive effects of AC-treated mixed self-assembled monolayers on
           copper corrosion
    • Abstract: Publication date: Available online 10 March 2017
      Source:Corrosion Science
      Author(s): Huanjie Yu, Caixia Li, Boyu Yuan, Liang Li, Chao Wang
      The inhibitive effects of alternating current-treated (AC-treated) mixed self-assembled monolayer (SAMHL/DT) with 2-(Pyridin-2-yliminomethyl)-phenol (HL) and dodecanethiol (DT) on copper corrosion have been studied by using the scanning electrochemical microscope (SECM) combined with Tafel and electrochemical impedance spectroscopy (EIS) methods When the AC-treated potential is applied in the cathodic region, the inhibition efficiency increases, and the pitting dynamic processes are inhibited. All the results reveal that the AC-treated effects are related to both the formation of complex compounds and the reduction of the oxide film on the surface of copper.

      PubDate: 2017-03-12T17:47:12Z
       
  • Deflection behaviour of corrosion crack growth in the heat affected zone
           of CrNiMoV steel welded joint
    • Abstract: Publication date: Available online 10 March 2017
      Source:Corrosion Science
      Author(s): Linghua Luo, Yuhui Huang, Fu-Zhen Xuan
      Stress corrosion cracking (SCC) growth tests in heat affected zone (HAZ) of 25Cr2Ni2MoV steel welded joint were conducted in 3.5wt.% NaCl solution at 180°C. The deflection of SCC towards the hard side of HAZ was observed interestingly, which was ascribed to the combined effect of the graded mechanical and electrochemical properties in HAZ. In addition, the initiation of SCC deflection was related to the crack-tip in-plane constraint. Through the specimen thickness, higher crack-tip out-of-plane constraint on the mid-thickness plane caused a preferential SCC deflection compared to that on the surface.

      PubDate: 2017-03-12T17:47:12Z
       
  • IFC - Editorial Board
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118


      PubDate: 2017-03-09T17:38:12Z
       
  • Effects of iron and chromium on the dynamic properties of oxygen in liquid
           lead–bismuth eutectic alloy
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Yichun Xu, Yange Zhang, Xiangyan Li, Wei Liu, Dongdong Li, C.S. Liu, B.C. Pan, Zhiguang Wang
      Ab initio molecular dynamics simulations were performed to investigate the effects of iron (Fe) and chromium (Cr) on the dynamic behaviour of oxygen in liquid lead–bismuth eutectic (LBE). The results indicated that oxygen atoms could be strongly attracted towards Fe and Cr atoms, forming metal oxide complexes dominated by Fe3O4 and Cr2O3. These oxide complexes could retard oxygen diffusion and reduce the concentration of free oxygen in LBE, thereby leading to an increase in the output of oxygen sensor in experiments. Besides, the diffusivities of Fe and Cr in LBE were obtained at different temperatures.

      PubDate: 2017-03-09T17:38:12Z
       
  • Adsorption and corrosion behaviour of Trichoderma harzianum for AZ31B
           magnesium alloy in artificial seawater
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Qing Qu, Shunling Li, Lei Li, Limei Zuo, Xin Ran, Yao Qu, Baolin Zhu
      Effect of the fungus, Trichoderma harzianum (T. harzianum), on the corrosion of AZ31 B magnesium alloy in artificial seawater (AS) has been studied. Hyphae of T. harzianum overlapped with corrosion products on the surface of AZ31 B magnesium alloy were clearly observed. Results showed that the presence of T. harzianum decreased the pH and E corr vs. SCE. Electrochemical results showed that i corr increased while R t decreased in the presence of T. harzianum obviously compared to the sterile AS, suggesting acceleration of the corrosion by T. harzianum. Cyclic polarization and SEM indicated that T. harzianum decreased the resistance of the localized corrosion.

      PubDate: 2017-03-09T17:38:12Z
       
  • The adsorption and inhibition behavior of two organic inhibitors for
           carbon steel in simulated concrete pore solution
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Yishan Wang, Yu Zuo
      The inhibition behavior of calcium lignosulfonate and sodium oleate for carbon steel in simulated concrete pore solution was studied. Calcium lignosulfonate showed good inhibition for steel in simulated concrete pore solution even after 7200h immersion. The molecular simulation indicated that sinapyl alcohol in calcium lignosulfonate is the preferred site for accepting electrons. The microscopic infrared imaging showed that at the early stage of immersion the characteristic adsorption happened for calcium lignosulfonate at the corroded areas on the surface, which would be helpful for preventing initiation and propagation of both general and pitting corrosion.

      PubDate: 2017-03-09T17:38:12Z
       
  • Influence of temperature on the electrochemical and passivation behavior
           of 2507 super duplex stainless steel in simulated desulfurized flue gas
           condensates
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Zhongyu Cui, Liwei Wang, Hongtao Ni, Wenkui Hao, Cheng Man, Shuangshuai Chen, Xin Wang, Zhiyong Liu, Xiaogang Li
      Influence of temperature on the electrochemical and passivation behavior of 2507 super duplex stainless steel in the simulated desulfurized flue gas condensates in thermal power plant chimney are investigated. Cathodic reactions are enhanced with temperature, accompanying with the involvement of oxygen reduction when the temperature is raised to 60°C or higher. The unchanged semiconductor type, enrichment of Cr and thickening of the passive film are observed as the temperature increases. The temperature-induced variations of film structure and doping concentrations are responsible for the degradation of protective ability of the passive film.

      PubDate: 2017-03-09T17:38:12Z
       
  • Effect of Al content on the high-temperature oxidation of Co-20Cr-(5,
           10)Al oxide dispersion strengthened superalloys
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Hao Yu, Shigeharu Ukai, Shigenari Hayashi, Naoko Oono
      The high-temperature oxidation of Co-based oxide dispersion strengthened (ODS) Co-20Cr-(5, 10) Al-2.4Hf-1.5Y2O3 (wt%) superalloys was investigated at 900°C and 1000°C. The 10Al (wt%) superalloys possess better oxidation resistance with the formation of alumina scale than the 5Al (wt%) with a duplex scale of CoCr2O4/Cr2O3 and internal Al2O3. The alumina on the 10Al superalloy is composed of θ- and α-alumina at 900°C but dominated by α-alumina at 1000°C. The lower weight gain of 10Al superalloys at 1000°C than at 900°C was associated with different growth mechanisms of the Al2O3 scales.

      PubDate: 2017-03-09T17:38:12Z
       
  • Development of growth and thermal stresses in NiO scale on nanocrystalline
           Ni without and with dispersion of CeO2 nanoparticles
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): X. Wei, X. Peng, X. Wang, Z. Dong
      The development of growth and thermal stresses in the NiO scale on a nanocrystalline (NC) Ni without and with the dispersion of CeO2 nanoparticles during isothermal oxidation in air at 800°C and subsequent cooling has been analyzed by using a two-sided oxidation deflection testing. The CeO2 dispersion causes the NC Ni to form a NiO scale which accommodates higher growth stresses during oxidation but lower thermal stresses during cooling. The result is interpreted by characterization of the effect of CeO2 dispersion on the growth mechanism and microstructure of the NiO scale on the NC Ni.

      PubDate: 2017-03-09T17:38:12Z
       
  • Cerium oxide nanoparticles influences on the binding and corrosion
           protection characteristics of a melamine-cured polyester resin on mild
           steel: An experimental, density functional theory and molecular dynamics
           simulation study
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Ghasem Bahlakeh, Bahram Ramezanzadeh, Mohammad Ramezanzadeh
      This study presents the role of cerium oxide nanoparticles (CeONPs) on the corrosion protection properties of a melamine-cured polyester (MCP) resin on CeONPs-modified steel. The coating disbondment and corrosion protection performance were evaluated by cathodic delamination test and electrochemical impedance spectroscopy. The stronger CeONPs/MCP bonds led to strengthened adhesion, better corrosion protection performance and lower cathodic delamination rate under dry and wet situations. Furthermore, theoretical results obtained from molecular dynamics and density functional theory methods clarified that MCP resin adhered to all oxide substrates with binding energies decreased in the sequence of CeO2 >Fe2O3 >Fe3O4 >FeO.

      PubDate: 2017-03-09T17:38:12Z
       
  • Corrosion resistance of a self-healing micro-arc
           oxidation/polymethyltrimethoxysilane composite coating on magnesium alloy
           AZ31
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Lan-Yue Cui, Shang-Dong Gao, Ping-Ping Li, Rong-Chang Zeng, Fen Zhang, Shuo-Qi Li, En-Hou Han
      A micro-arc oxidation (MAO)/polymethyltrimethoxysilane (PMTMS) hybrid coating was fabricated via MAO processing and subsequent sealing with alkaline treatment and PMTMS. The surface morphologies, chemical compositions and corrosion resistances of the coatings were investigated using FE-SEM, FTIR, XRD and electrochemical and hydrogen evolution measurements. The results indicated that the alkaline treatment was beneficial to the silane treatment and that the MAO coating was efficiently sealed by the PMTMS film. The MAO/PMTMS coating significantly enhanced the corrosion resistance of the AZ31 alloy due to its self-healing function. Additionally, we suggest and discuss a corrosion mechanism for the coating.
      Graphical abstract image

      PubDate: 2017-03-09T17:38:12Z
       
  • Corrosion of polypyrrole: Kinetics of chemical and electrochemical
           processes in NaOH solutions
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Yao Wang, Yubing Qiu, Zhenyu Chen, Xingpeng Guo
      The corrosion kinetics of PPy/SO4 in aerated and de-aerated NaOH solutions (0.02–0.5M) were investigated and the interaction between chemical and electrochemical corrosion processes was verified. The corrosion of PPy is mainly caused by the chemical attack of OH− in de-aerated NaOH, but is accelerated largely in aerated NaOH for the occurrence of the electrochemical processes. These two processes are mutually promoted in aerated NaOH. At a constant NaOH concentration (C NaOH), two corrosion stages are proved to follow first-order kinetics. In each corrosion stage, the chemical and electrochemical processes have different kinetic behavior and C NaOH has important influence on them.

      PubDate: 2017-03-09T17:38:12Z
       
  • The effect of three luminescent ionic liquids on corroded glass surfaces
           – A first step into stained-glass cleaning
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): J.M. Delgado, D. Nunes, E. Fortunato, C.A.T Laia, L.C. Branco, M. Vilarigues
      Corrosion in medieval stained-glass represents a challenging issue in Conservation Science, being mainly composed by calcium salts. Model glass materials were produced and then subjected to an accelerated corrosion environment. Early stage glass corrosion layers observed were afterwards cleaned with luminescent ionic liquids (ILs). The effectiveness of the treatment was compared with Ethylenediaminetetraacetic acid solution and high levels of humidity, both of which have caused alterations on the glass surface. With the ILs, detectable morphological or chemical alterations were avoided and the gel-layer remains on the glass surface, indicating that these are a viable alternative to conventional cleaning methods.
      Graphical abstract image

      PubDate: 2017-03-09T17:38:12Z
       
  • Corrosion behaviour of X65 carbon steel in supercritical-CO2 containing
           H2O and O2 in carbon capture and storage (CCS) technology
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Y. Tang, X.P. Guo, G.A. Zhang
      Corrosion behaviour of X65 carbon steel in supercritical-CO2 (SC-CO2) containing H2O and O2 was studied by weight loss test, electrochemical measurements, and surface analysis. A setup was developed for in situ electrochemical measurements in H2O-saturated SC-CO2 phase by using Ag/AgCl reference electrode. It is demonstrated that there is no essential difference in the electrochemical corrosion mechanism between SC-CO2 and non-SC-CO2 environments. The presence of small amount of O2 inhibits the formation of protective FeCO3 film and promotes the formation of non-protective Fe oxide, which leads to obvious increase of corrosion rate in SC-CO2 phase.

      PubDate: 2017-03-09T17:38:12Z
       
  • Role of alloyed Y in improving the corrosion resistance of extruded
           Mg–Al–Ca-based alloy
    • Abstract: Publication date: April 2017
      Source:Corrosion Science, Volume 118
      Author(s): Soo-Min Baek, Jeong Su Kang, Hyung-Joon Shin, Chang Dong Yim, Bong Sun You, Heon-Young Ha, Sung Soo Park
      We report that alloying with Y remarkably enhances the corrosion resistance of extruded Mg–Al–Ca-based alloy. The corrosion rates, measured by immersion tests in 0.6M NaCl solution at 25°C, were 0.31 and 1.84mmy−1 for the Mg–6Al–1Zn–0.5Ca–0.3Mn (wt.%) alloys with and without 0.25wt.% Y, respectively. The improved corrosion resistance is mainly attributed to a change in the type of Al-containing intermetallic particles toward reducing their electrochemical nobility, resulting in reduced H2 evolution rate during corrosion.

      PubDate: 2017-03-09T17:38:12Z
       
  • 2-Mercaptopyrimidine as an effective inhibitor for the corrosion of cold
           rolled steel in HNO3 solution
    • Abstract: Publication date: Available online 10 February 2017
      Source:Corrosion Science
      Author(s): Xianghong Li, Shuduan Deng, Tong Lin, Xiaoguang Xie, Guanben Du
      The inhibition effect of five pyrimidine derivatives (2-chloropyrimidine, 2-hydroxypyrimidine, 2-bromopyrimidine, 2-aminopyrimidine, 2-mercaptopyrimidine) on the corrosion of cold rolled steel (CRS) in 0.1M HNO3 solution was comparatively examined. 2-Mercaptopyrimidine (MP) was found to be an effective inhibitor with the inhibition efficiency as high as 99.1% at a low concentration 0.50mM. But other four pyrimidine derivatives exhibited poor inhibitive ability. The addition of MP caused both anodic and cathodic curves to low current densities, and was found to significantly strengthen the impedance. Quantum chemical calculation and molecular dynamic simulation were performed to theoretically investigate the adsorption mechanism.
      Graphical abstract image

      PubDate: 2017-02-12T15:20:18Z
       
  • Inhibitory effect of cetyltrimethylammonium bromide on the electrochemical
           migration of tin in thin electrolyte layers containing chloride ions
    • Abstract: Publication date: Available online 10 February 2017
      Source:Corrosion Science
      Author(s): Bokai Liao, Zhenyu Chen, Qubing Qiu, Xingpeng Guo
      This paper presents a new strategy involving the introduction of the common cationic surfactant cetyltrimethylammonium bromide (cetrimonium bromide, CTAB) to inhibit the electrochemical migration (ECM) of tin in thin electrolyte layers containing chloride ions. The inhibitory effect of different CTAB concentrations on tin ECM under different bias voltages was evaluated using in situ electrochemical and optical techniques, as well as ex situ characterizations. Results showed that CTAB can effectively inhibit tin ECM, and CTAB affected the electrodeposition during tin ECM by selective adsorption. Mechanisms were proposed to explain the beneficial role of CTAB.

      PubDate: 2017-02-12T15:20:18Z
       
  • Pitting corrosion of sensitised type 304 stainless steel under
           wet–dry cycling condition
    • Abstract: Publication date: Available online 10 February 2017
      Source:Corrosion Science
      Author(s): Cong-Qian Cheng, Laura-Isabell Klinkenberg, Yaoki Ise, Jie Zhao, Eiji Tada, Atsushi Nishikata
      The pitting corrosion of sensitised stainless steel (SS) 304 during wet–dry cycling were investigated and compared with that of AR one. The average relative humidity for pitting corrosion during drying and repassivation during wetting correspondingly increased from 56% to 65% and from 67% to 79% by sensitisation. The decrease in pit potential and critical chloride concentration provides the degradation evidence of sensitised SS 304. The pitting probability and pit average size were promoted by sensitisation. The pit morphology changed from round to irregular shape. Such modification was possibly induced by preferential corrosion along grain boundaries where the pit initiated.

      PubDate: 2017-02-12T15:20:18Z
       
  • The Influence of Calcareous Deposits on Hydrogen Uptake and Embrittlement
           of API 5CT P110 Steel
    • Abstract: Publication date: Available online 8 February 2017
      Source:Corrosion Science
      Author(s): Leonardo Simoni, Júlio Queiroz Caselani, Leandro Brunholi Ramos, Roberto Moreira Schroeder, Célia de Fraga Malfatti
      The effect of calcareous deposits on hydrogen uptake and embrittlement of API 5CT P110 steel was investigated using the electrochemical hydrogen permeation and slow strain rate techniques. A deposit with two distinct layers was formed at −1000mVSCE, comprising an initial Mg-rich layer followed by a Ca-rich layer whereas at −1500mVSCE the deposit was porous and rich in Mg. The formation of calcareous deposits did not significantly alter hydrogen uptake and embrittlement at −1000mVSCE whereas at −1500mVSCE they were increased. A mechanism was proposed to explain the different roles of calcareous deposits in hydrogen absorption and embrittlement.

      PubDate: 2017-02-12T15:20:18Z
       
  • Behaviour of a silicon-rich coating on Ti-46Al-8Ta (at. %) in
           hot-corrosion environments
    • Abstract: Publication date: Available online 6 February 2017
      Source:Corrosion Science
      Author(s): K. Rubacha, E. Godlewska, K. Mars
      In this work silicon-rich coating was deposited on a Ti-46Al-8Ta (at. %) alloy in a two-step procedure comprising physical and chemical vapour deposition (magnetron sputtering and pack cementation, respectively). Protective properties of the coating were tested through cyclic oxidation in air at 800 °C with samples contaminated with NaCl, Na2SO4 or a mixture of these two salts. The coated samples exhibited better hot corrosion resistance compared with the uncoated reference. This was attributed to the formation of an oxide layer composed of amorphous silica with embedded rutile and α cristobalite crystals, constituting a barrier against oxygen penetration.

      PubDate: 2017-02-12T15:20:18Z
       
  • Effect of pre-deformation on the oxidation resistance of a high Si
           ferritic/martensitic steel in oxygen-saturated stagnant lead-bismuth
           eutectic at 550°C
    • Abstract: Publication date: Available online 5 February 2017
      Source:Corrosion Science
      Author(s): Hong Dong, Pei Wang, Dianzhong Li, Yiyi Li
      The oxidation resistance of a high Si ferritic/martensitic steel with and without pre-deformation in oxygen-saturated stagnant lead-bismuth eutectic at 550°C has been investigated. It is found that pre-deformation changes the morphology of the oxide scale locally. In some positions, the internal oxidation zone beneath the inner oxide layer disappears and/or the thickness of the inner oxide layer decreases. These changes are related to the formation of an enhanced Cr-rich belt locally in the inner oxide layer. Additionally, the local enhanced Cr-rich belt induces many voids at the inner/outer oxide layer interface, which deteriorates the oxidation resistance of the material.

      PubDate: 2017-02-05T21:54:03Z
       
  • Effects of dissolved hydrogen and surface condition on the intergranular
           stress corrosion cracking initiation and short crack growth behavior of
           non-sensitized 316 stainless steel in simulated PWR primary water
    • Abstract: Publication date: Available online 4 February 2017
      Source:Corrosion Science
      Author(s): Xiangyu Zhong, Shirish Chandrakant Bali, Tetsuo Shoji
      The effects of dissolved hydrogen (DH) and inner surface finish condition of the hollowed specimen on stress corrosion crack (SCC) initiation and small crack growth behaviors of 316 stainless steel were investigated in high temperature water with various DH levels. The drilled specimen showed higher surface hardness and more enhanced SCC initiation and short crack growth behavior than honed specimen but both showed a similar trend in the water chemistry with different DH levels. Fractographic examinations showed mixed modes of transgranular and intergranular cracking. The influences of DH and surface condition on SCC behaviors are discussed.

      PubDate: 2017-02-05T21:54:03Z
       
  • High-temperature oxidation behavior of laser-aided additively manufactured
           NiCrAlY coating
    • Abstract: Publication date: Available online 4 February 2017
      Source:Corrosion Science
      Author(s): M. Ansari, R. Shoja-Razavi, M. Barekat, H.C. Man
      In this study, NiCrAlY coatings were additively manufactured on the surface of IN738 substrate through a laser-aided additive manufacturing approach. The high-temperature oxidation behavior of freestanding coatings at 1200°C was also investigated. The coatings were thick, dense, and well-bonded with dendritic γ/β microstructure. The results proved that the coatings were able to withstand the operating temperature of 1200°C for up to ten cycles. After ten cycles of oxidation, the oxide scales formed on the coatings were mainly composed of α-Al2O3 and Al5Y3O12 phases; however, NiO, Cr2O3 and Ni(Cr,Al)2O4 phases were not detected.
      Graphical abstract image

      PubDate: 2017-02-05T21:54:03Z
       
 
 
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