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  Subjects -> ENGINEERING (Total: 2269 journals)
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ENGINEERING (1201 journals)                  1 2 3 4 5 6 7 | 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)
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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: 207)
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Active and Passive Electronic Components     Open Access   (Followers: 7)
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Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
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Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
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Annals of Pure and Applied Logic     Open Access   (Followers: 2)
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Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
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Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
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ATZextra worldwide     Hybrid Journal  
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Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
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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)
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Bell Labs Technical Journal     Hybrid Journal   (Followers: 24)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
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Biofuels Engineering     Open Access  
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Biomaterials Science     Full-text available via subscription   (Followers: 8)
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Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
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Biotechnology Progress     Hybrid Journal   (Followers: 40)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
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Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
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Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 14)
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: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
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: 4)
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)
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Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 10)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 20)
Clay Minerals     Full-text available via subscription   (Followers: 8)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
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Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
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Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
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Corrosion Science     Hybrid Journal   (Followers: 24)
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        1 2 3 4 5 6 7 | 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  [3041 journals]
  • 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
       
  • Synergy of corrosion-induced micro-cracking and hydrogen embrittlement on
           the structural integrity of aluminium alloy (Al-Cu-Mg) 2024
    • Abstract: Publication date: Available online 10 March 2017
      Source:Corrosion Science
      Author(s): Nikolaos D. Alexopoulos, Christina Charalampidou, Panagiotis Skarvelis, Stavros K. Kourkoulis
      Synergy of corrosion-induced micro-cracking and hydrogen embrittlement on the structural integrity of ultra-thin 2024-T3 aluminium sheets is investigated. Depth of attack of corrosion-induced cracks was experimentally measured and crack density was calculated. Stress intensity factor probability density follows the normal and lognormal distribution for the low and high exposure times, respectively. Transverse (T) rolling direction is more susceptible to corrosion attack and fracture, as 26% fracture probability was calculated after only 2h corrosion exposure when compared to only 11% for the Longitudinal (L) rolling direction. The synergetic mechanisms of (a) micro-cracks and (b) hydrogen embrittlement were experimentally derived from the plots of tensile ductility over depth of attack values. It was found that in the L-rolling direction, 27% of the ductility decrease is attributed to the hydrogen embrittlement while the rest 73% to the micro-crack formation. For the case of T rolling direction, the respective contributions are 49% and 51% that proves its high susceptibility to corrosion attack and especially to hydrogen embrittlement.

      PubDate: 2017-03-12T17:47:12Z
       
  • Indolines as novel corrosion inhibitors: Electrochemical, XPS, DFT and
           molecular dynamics simulation studies
    • Abstract: Publication date: Available online 10 March 2017
      Source:Corrosion Science
      Author(s): M. Yadav, T.K. Sarkar, I.B. Obot
      Corrosion inhibitive and adsorptive capabilities of synthesized indoline derivatives namely, 2-(1-(4-((furan-2-ylmethylene)amino)-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)-2-(1H imidazol-2-yl)ethyl)isoindoline-1,3-dione (FTTI) and 2-(1-(4-((furan-2-ylmethylene)amino)-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)-2-methylbutyl)isoindoline-1,3-dione (FTMI) on oil-field N80 steel in 15% HCl solution was measured by mass loss, polarization, EIS and PZC procedures. The compounds FTTI and FTMI are efficient corrosion inhibitors and they adsorb on N80 steel surface following Langmuir adsorption isotherm. SEM, EDX, AFM and XPS were used for characterizing the surface of N80 steel samples after exposing them to 15% HCl without and with FTTI and FTMI. DFT and Molecular dynamics simulation (MDS) were applied for theoretical studies.

      PubDate: 2017-03-12T17:47:12Z
       
  • 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
       
  • Influence of multispecies biofilms of Pseudomonas aeruginosa and
           Desulfovibrio vulgaris on the corrosion of cast iron
    • Abstract: Publication date: Available online 7 March 2017
      Source:Corrosion Science
      Author(s): Farhad Batmanghelich, Lei Li, Youngwoo Seo
      The impact of biofilm formation and bacterial solutions of Desulfovibrio vulgaris (a sulfate reducing bacteria, SRB) and Pseudomonas aeruginosa (PAO1, denitrifying bacteria) on the corrosion of cast iron was assessed and compared in this study. Corrosion experiments were separately conducted in respective culture media (in-situ) and in 3.5% NaCl (ex-situ, pH 4). The extent of cast iron corrosion diminishes in the co-presence of PAO1 and SRB compared to SRB alone. However, patchy and scanty biofilms of PAO1 did not protect the surface in 3.5% NaCl solution compared to SRB biofilms.
      Graphical abstract image

      PubDate: 2017-03-09T17:38:12Z
       
  • Effects of Electropolishing on Corrosion and Stress Corrosion Cracking of
           Alloy 182 in High Temperature Water
    • Abstract: Publication date: Available online 6 March 2017
      Source:Corrosion Science
      Author(s): Yaolei Han, En-Hou Han, Qunjia Peng, Wei Ke
      Effects of changes in surface chemical composition and microstructure by electropolishing on corrosion and stress corrosion cracking (SCC) of Alloy 182 in high temperature water were investigated. The results showed that electropolishing mitigated the corrosion, intergranular corrosion and SCC of Alloy 182. This is attributed to formation of the Cr-enriched, protective oxide on electropolished surface due to the enrichment of Cr by electropolishing. In particular, formation of the protective, blunted oxide at grain boundaries on electropolished surface mitigated the intergranular corrosion and caused a lower SCC susceptibility of Alloy 182.

      PubDate: 2017-03-09T17:38:12Z
       
  • Synthesis and inhibitory effect of
           N,N'-bis(1-phenylethanol)ethylenediamine against steel corrosion in HCl
           Media
    • Abstract: Publication date: Available online 6 March 2017
      Source:Corrosion Science
      Author(s): Gökmen Sığırcık, Deniz Yildirim, Tunç Tüken
      A new organic compound N,N'-bis(1-phenylethanol)ethylenediamine was synthesized and its inhibition efficiency was studied with electrochemical impedance spectroscopy and potentiodynamic measurement, as well as solution assay analysis. The influences of temperature and inhibitor concentration were investigated for explaining the inhibition mechanism. It was shown that both physical and chemical type adsorptive interactions occur via π-bonding electrons, NH and OH groups. Besides, SEM, UV–visible and FTIR analyses were carried out to investigate the structure of protective layer formed on the steel surface.

      PubDate: 2017-03-09T17:38:12Z
       
  • Internal Oxidation Behaviour of Fe-Mn-Al-C Duplex Light-weight Steels with
           Good Combination of Strength and Ductility
    • Abstract: Publication date: Available online 6 March 2017
      Source:Corrosion Science
      Author(s): Wei Peng, Zhaoyu Wu, Yulai Xu, Qingxuan Ran, Wanjian Xu, Jun Li, Xueshan Xiao
      The oxidation behaviour of Fe-20Mn-8Al-xC (x =0.25-0.35wt. %) duplex light-weight steels at 1000°C in dry air has been investigated. The results show that the increased carbon content enlarges austenite phase fractions and degrades oxidation resistance to high temperature. The preferential oxidation of manganese at high temperature promotes phase transformation of austenite→ferrite, and offers pathways for aluminium diffusion. Aluminium enriches at the boundary of the austenite internal oxidation layer. A continuous and compact pure Al2O3 layer has been observed between iron and manganese oxides and oxidation-induced ferrite layers. The formed Al2O3 layer can further prevent oxidation of Fe-20Mn-8Al-xC duplex steels.

      PubDate: 2017-03-09T17:38:12Z
       
  • The influence of microstructural evolution on selective corrosion in
           duplex stainless steel flux-cored arc welded joints
    • Abstract: Publication date: Available online 6 March 2017
      Source:Corrosion Science
      Author(s): Zhiqiang Zhang, Hongyang Jing, Lianyong Xu, Yongdian Han, Lei Zhao
      The influence of microstructural evolution on selective corrosion in duplex stainless steel flux-cored arc welding joint was investigated by the modified double loop electrochemical potentiokinetic reactivation in acidified chloride. Due to the lower pitting resistance equivalent number, the secondary austenite was preferentially attacked over the ferrite and primary austenite phases, and inclusions acted as nucleation sites for micro-pits in the weld metal. Localised corrosion was generated in the secondary austenite and Cr-depleted zone around the Cr2N and sigma phases in the heat-affected zone. The weld metal exhibited the smallest susceptibility to localised corrosion because of the least weak phases.

      PubDate: 2017-03-09T17:38:12Z
       
  • Synergistic effect of reactive element co-doping in two-phase
           (γ’+β) Ni-Al alloys
    • Abstract: Publication date: Available online 6 March 2017
      Source:Corrosion Science
      Author(s): Jian He, Hui Peng, Shengkai Gong, Hongbo Guo
      To propose reactive element (RE) co-doping strategy, the oxidation behaviour of Dy, Hf, Y, Zr single- and co-doped Ni-30Al alloys was comparatively studied. All the alloys containing Dy or Y exhibited improved scale adhesion due to the pinning effect of the pegs at the scale/alloy interfaces and the reduced residual stress by the flaky oxides formed on the alloy surfaces. Compared to the corresponding RE single-doping, Dy/Hf, Dy/Zr, Hf/Y and Y/Zr co-doping further reduced the scale growth rate, revealing a synergistic effect. The role of reactive element co-segregation in the formation of synergistic effect was analyzed.

      PubDate: 2017-03-09T17:38:12Z
       
  • Assessment of Local Conductivity Distribution in Stress Corrosion Crack
           Region Using Direct Current Potential Drop Method
    • Abstract: Publication date: Available online 4 March 2017
      Source:Corrosion Science
      Author(s): Wenlu Cai, Shejuan Xie, Cherdpong Jomdecha, Xiaojuan Wang, Cuixiang Pei, Yong Li, Zhenmao Chen, Noritaka Yusa
      As an effort to enhance the precision of quantitative nondestructive evaluation on stress corrosion crack (SCC) sizing with eddy current testing (ECT) technique, the electrical conductivity distribution in the SCC region was investigated in this work through measurement and inversion of the direct current potential drop (DCPD) signals with a sliced specimen strategy. An inversion scheme, consisting of an efficient forward DCPD signal simulator and the conjugate gradient optimization algorithm, was proposed and implemented for the reconstruction of the two-dimensional (2D) conductivity distribution inside the SCC. The reasonable reconstruction results from the measured DCPD signals of the practical SCC specimens proved the validity of the proposed scheme. The 2D distribution obtained in this paper shows that the conductivity becomes larger when approaching the crack tip and is the minimum in the crack opening position. The obtained SCC conductivity information gives a good reference to enhance the crack sizing accuracy of ECT.

      PubDate: 2017-03-09T17:38:12Z
       
  • Investigation of processes occurring at cathodically protected underground
           installations: Mathematical modeling of reaction transport processes in
           soil
    • Abstract: Publication date: Available online 3 March 2017
      Source:Corrosion Science
      Author(s): Roman Kodým, Dalimil Šnita, Vlastimil Fíla, Karel Bouzek, Milan Kouřil
      A dynamic mathematical modeling study of reaction‐transport processes taking place in the vicinity of a defect in coating of underground pipeline protected by cathodic protection is presented. The main chemical reactions providing buffering ability of the soil system (water autoprotolysis, carbon dioxide/bicarbonate/carbonate system, dissociation/precipitation of calcium carbonate) are considered. The model calculations provided qualitative and quantitative information on the dynamic variation of the soil solution pH after application of cathodic protection. A significant pH increase (>12), due solely to oxygen reduction, is proved. A moderate polarization (around Kuhn’s postulated protective potential) is, therefore, sufficient for effective protection of underground structures.
      Graphical abstract image

      PubDate: 2017-03-04T17:21:12Z
       
  • Atmospheric corrosion assessed from corrosion images using fuzzy
           Kolmogorov–Sinai entropy
    • Abstract: Publication date: Available online 2 March 2017
      Source:Corrosion Science
      Author(s): Da-Hai Xia, Chao Ma, Shizhe Song, Weixian Jin, Yashar Behnamian, Hongqiang Fan, Jihui Wang, Zhiming Gao, Wenbin Hu
      Fuzzy Kolmogorov–Sinai (K–S) entropy was used to characterize the irregularity of the spatial information distribution in a corrosion image. The fuzzy K–S entropy was measured for horizontal and vertical orientations of corrosion images of steel samples exposed to a marine atmosphere over 191days. The fuzzy K-S entropy for horizontal and vertical orientations decreased as the corrosion propagated. A relationship between the fuzzy K–S entropy and the weight loss in the steel sample can be presented with a linear mathematical expression. Fuzzy K–S entropy was found to be a semiquantitative and fast method to quantify atmospheric corrosion.
      Graphical abstract image

      PubDate: 2017-03-04T17:21:12Z
       
  • Synthesis and characterisation of composite nanoparticles of mesoporous
           silica loaded with inhibitor for corrosion protection of Cu-Zn alloy
    • Abstract: Publication date: Available online 2 March 2017
      Source:Corrosion Science
      Author(s): Xin Ma, Likun Xu, Wei Wang, Zhifeng Lin, Xiangbo Li
      A new type of composite nanoparticles (CNPs) was prepared by loading a typical inhibitor 1-hydroxybenzotriazole (HOBT) for corrosion protection of copper alloy in mesoporous silica nano-containers. The release kinetics of HOBT from CNPs in 3.5% NaCl solution was in conformity with the first order kinetic model. The open circuit potential monitoring, the morphology observation and the scanning Kelvin probe measurement of the Cu-Zn alloy in 3.5% NaCl solution with CNPs proved that a uniformly protective film was formed on the surface. Electrochemical impedance spectroscopy was employed to analyse the corrosion inhibition process of CNPs on the Cu-Zn alloy.
      Graphical abstract image

      PubDate: 2017-03-04T17:21:12Z
       
  • IFC - Editorial Board
    • Abstract: Publication date: March 2017
      Source:Corrosion Science, Volume 117


      PubDate: 2017-02-12T15:20:18Z
       
  • Environmentally assisted crack growth in 308L stainless steel weld metal
           in simulated primary water
    • Abstract: Publication date: March 2017
      Source:Corrosion Science, Volume 117
      Author(s): Lijin Dong, En-Hou Han, Qunjia Peng, Wei Ke, Lei Wang
      Environmentally assisted crack growth behavior of 308L stainless steel weld metal in simulated primary water was investigated. The results showed ultra-low stress corrosion crack growth in the weld metal. However, obvious environmental acceleration of fatigue crack growth was observed, which is increased by more aggressive water chemistry and gentle cyclic loading conditions. Further, the environmental fatigue crack growth rate of 308L weld metal was lower than that of 304 and 316 stainless steels under the same environmental and loading conditions. This was attributed to the retardation of crack growth by δ ferrite phase.

      PubDate: 2017-02-12T15:20:18Z
       
  • 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
       
  • Interaction of Ta and Cr on Type-I hot corrosion resistance of single
           crystal Ni-base superalloys
    • Abstract: Publication date: Available online 19 January 2017
      Source:Corrosion Science
      Author(s): J.X. Chang, D. Wang, G. Zhang, L.H. Lou, J. Zhang
      Type-I hot corrosion behaviour of single crystal Ni-base superalloys with different Cr and Ta contents in sodium sulphate (Na2SO4) at 900°C and 950°C in static air were investigated using the “deposit recoat” method. It was shown that, increasing corrosion temperature shortened the incubation period. Loss of hot corrosion resistance causing by Cr reduction cannot be compensated by increasing Ta content. The effect of Ta addition on hot corrosion resistance can be described by introducing the quantitative parameter Ta/Cr (wt.%) ratio. Interaction of Cr, Ta and temperature on hot corrosion behaviour was discussed in detail in the present paper.

      PubDate: 2017-01-22T13:52:13Z
       
  • Insights into corrosion inhibition behavior of multi-active compounds for
           X65 pipeline steel in acidic oilfield formation water
    • Abstract: Publication date: Available online 18 January 2017
      Source:Corrosion Science
      Author(s): Huiwen Tian, Weihua Li, Baorong Hou, Dapeng Wang
      Inhibition behavior of new designed inhibitors for X65 steel in CO2 saturated oilfield formation water containing acetic acid has been investigated by electrochemical measurements, surface characterization, scanning vibrating electrode technique, rotating electrochemical quartz crystal microbalance, and X-ray photoelectron spectroscopy. It is found the inhibition efficiency can exceed 95% for each inhibitor at a concentration of 3×10−4 mol/L. The inhibitor film exhibits a compact and uniform structure, which is more effective for the corroded rather than freshly prepared steel surface due to the facilitation of chemisorption. The active centers of inhibitor adsorption mainly focus on N, S atoms, and conjugation system.

      PubDate: 2017-01-22T13:52:13Z
       
  • Corrosion inhibition and anti-bacterial efficacy of benzalkonium chloride
           in artificial CO2-saturated oilfield produced water
    • Abstract: Publication date: Available online 13 January 2017
      Source:Corrosion Science
      Author(s): Hongwei Liu, Tingyue Gu, Yalin Lv, Muhammad Asif, Fuping Xiong, Guoan Zhang, Hongfang Liu
      Corrosion inhibition by benzalkonium chloride (BKC) against anaerobic CO2 corrosion and microbiologically influenced corrosion was studied using surface analysis, weight loss and electrochemical measurements. Results showed that the minimal bactericidal concentration of BKC against Desulfotomaculum nigrificans (D. nigrificans) was 40mgL−1. While at this concentration the planktonic D. nigrificans cell count could recover after 21-day incubation, it resulted in 4 log reduction in sessile D. nigrificans cell count. When 80mgL−1 BKC was used, both planktonic and sessile D. nigrificans became undetectable. It was found that at these concentrations, BKC reduced both uniform corrosion and pitting corrosion.

      PubDate: 2017-01-16T15:40:37Z
       
  • Corrosion characteristics of a 4-year naturally corroded reinforced
           concrete beam with load-induced transverse cracks
    • Abstract: Publication date: Available online 11 January 2017
      Source:Corrosion Science
      Author(s): Chuanqing Fu, Nanguo Jin, Hailong Ye, Xianyu Jin, Wei Dai
      This work studies the corrosion characteristics of reinforcement in a 4-year naturally corroded concrete beam after accelerated chloride penetration. The results show that the presence of transverse cracks in the tension surface of reinforced concrete beam can globally exacerbate the loss of cross-sectional area of rebar. However, there is no strong correlation between the width of transverse cracks, with the width of longitudinal cracks and loss of cross-sectional area of corroded rebar at a specific location. The self-healing of cracks and sacrificing roles of stirrups at crack tips seem to reduce the impacts of cracks on the corrosion propagation.

      PubDate: 2017-01-16T15:40:37Z
       
 
 
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