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Effects of pH and Cl- Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution
Yuan, Xuwen1,2,3; Wang, Xuan2,3; Yang, Huaiyu2
Corresponding AuthorYang, Huaiyu(hyyang@imr.ac.cn)
2022-03-01
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
Volume169Issue:3Pages:9
AbstractThe degradation behavior of four prepassivated stainless steels (SSs) in the alkaline solutions with different Cl- concentrations and pH values were investigated by cyclic potentiodynamic polarization (CPP), electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis and the X-ray photoelectron spectroscopy (XPS). The results indicated that the pH value and Cl- concentration, together with the phase ratio difference in the microstructure of SS, played a critical role in the degradation process of passive film. At low pH and high Cl- concentration, the passive film gradually enriched in Fe3+ and Cr3+ species and depleted in Fe2+ oxides and its self-regeneration process became more difficult. As the pH decreased, the passive film exhibited clear n-type and p-type semiconductor characteristics more clearly, and the decrease in dopant density well reflected the changes in Fe2+/Fe3+ ratio and electrochemical behavior. Based on the viewpoint of adsorption balance between OH- with inhibitory effect and Cl- with promotion effect on the degradation process, a mechanism for the degradation process of prepassivation film was proposed.
Funding OrganizationNational Basic Research Program of China
DOI10.1149/1945-7111/ac595b
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China[2015CB655105]
WOS Research AreaElectrochemistry ; Materials Science
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
WOS IDWOS:000767563800001
PublisherELECTROCHEMICAL SOC INC
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173196
Collection中国科学院金属研究所
Corresponding AuthorYang, Huaiyu
Affiliation1.Hubei Univ Automot Technol, Dept Mat Sci & Engn, Shiyan 442002, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Yuan, Xuwen,Wang, Xuan,Yang, Huaiyu. Effects of pH and Cl- Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2022,169(3):9.
APA Yuan, Xuwen,Wang, Xuan,&Yang, Huaiyu.(2022).Effects of pH and Cl- Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,169(3),9.
MLA Yuan, Xuwen,et al."Effects of pH and Cl- Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 169.3(2022):9.
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