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Relationship Between pH and Electrochemical Corrosion Behavior of Thermal-Sprayed Ni-Al-Coated Q235 Steel in Simulated Soil Solutions
Wei, Wei; Wu, Xin-qiang; Ke, Wei; Xu, Song; Feng, Bing; Hu, Bo-tao; Wu, XQ (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Shenyang 110016, Liaoning, Peoples R China.
2017-09-01
Source PublicationSPRINGER
ISSN1059-9495
Volume26Issue:9Pages:4340-4348
AbstractElectrochemical corrosion behavior of a thermal-sprayed Ni-Al-coated Q235 steel was investigated in the simulated soil solutions at different pH values using measurements of potentiodynamic polarization curves and electrochemical impedance spectroscopy as well as surface analyses including x-ray diffraction analysis, scanning electron microscope equipped with an energy-dispersive x-ray spectroscopy and x-ray photoelectron spectroscopy. The results showed that the corrosion resistance of the Ni-Al-coated Q235 steel was dependent on the pH of the test solution. From pH = 3.53 to pH = 4.79, the corrosion resistance of the coated steel increased rapidly. In the pH range from 4.79 to 12.26, the corrosion resistance exhibited no significant change. At pH 13.25, the corrosion resistance of the sample was found to decrease. The calculated corrosion rate of Ni-Al-coated Q235 steel was lower than that of the uncoated Q235 steel and galvanized steel in all the test solutions. Over a wide range of pH values, the Ni-Al-coated Q235 steel exhibited extremely good corrosion resistance. The experimental data together with the potential-pH diagrams provided a basis for a detailed discussion of the related corrosion mechanisms of the coated steel.; Electrochemical corrosion behavior of a thermal-sprayed Ni-Al-coated Q235 steel was investigated in the simulated soil solutions at different pH values using measurements of potentiodynamic polarization curves and electrochemical impedance spectroscopy as well as surface analyses including x-ray diffraction analysis, scanning electron microscope equipped with an energy-dispersive x-ray spectroscopy and x-ray photoelectron spectroscopy. The results showed that the corrosion resistance of the Ni-Al-coated Q235 steel was dependent on the pH of the test solution. From pH = 3.53 to pH = 4.79, the corrosion resistance of the coated steel increased rapidly. In the pH range from 4.79 to 12.26, the corrosion resistance exhibited no significant change. At pH 13.25, the corrosion resistance of the sample was found to decrease. The calculated corrosion rate of Ni-Al-coated Q235 steel was lower than that of the uncoated Q235 steel and galvanized steel in all the test solutions. Over a wide range of pH values, the Ni-Al-coated Q235 steel exhibited extremely good corrosion resistance. The experimental data together with the potential-pH diagrams provided a basis for a detailed discussion of the related corrosion mechanisms of the coated steel.
description.department[wei, wei ; wu, xin-qiang ; ke, wei] chinese acad sci, inst met res, cas key lab nucl mat & safety assessment, liaoning key lab safety & assessment tech nucl ma, shenyang 110016, liaoning, peoples r china ; [wei, wei] univ chinese acad sci, 19 a yuquan rd, beijing 100049, peoples r china ; [xu, song ; feng, bing ; hu, bo-tao] hunan elect power corp res inst, changsha 410007, hunan, peoples r china
KeywordCorrosion Resistance Grounding Grids Ni-al Coating Ph Value Thermal Spraying
Subject AreaMaterials Science, Multidisciplinary
Funding OrganizationScience and Technology Foundation of China [51371174]; Science Project of State Grid Corporation of China [KG12K16004]; Innovation Fund of IMR, CAS
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79111
Collection中国科学院金属研究所
Corresponding AuthorWu, XQ (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Liaoning Key Lab Safety & Assessment Tech Nucl Ma, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wei, Wei,Wu, Xin-qiang,Ke, Wei,et al. Relationship Between pH and Electrochemical Corrosion Behavior of Thermal-Sprayed Ni-Al-Coated Q235 Steel in Simulated Soil Solutions[J]. SPRINGER,2017,26(9):4340-4348.
APA Wei, Wei.,Wu, Xin-qiang.,Ke, Wei.,Xu, Song.,Feng, Bing.,...&Wu, XQ .(2017).Relationship Between pH and Electrochemical Corrosion Behavior of Thermal-Sprayed Ni-Al-Coated Q235 Steel in Simulated Soil Solutions.SPRINGER,26(9),4340-4348.
MLA Wei, Wei,et al."Relationship Between pH and Electrochemical Corrosion Behavior of Thermal-Sprayed Ni-Al-Coated Q235 Steel in Simulated Soil Solutions".SPRINGER 26.9(2017):4340-4348.
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