Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution

doi:10.1149/1945-7111/ac595b

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	Effects of pH and Cl? Content on Degradation Process of Pre-Passivated Stainless Steels in an Alkaline Solution
	Yuan,Xuwen 1,2,3; Wang,Xuan 1,3; Yang,Huaiyu 1
刊名	Journal of The Electrochemical Society
	2022-03-01
卷号	169 期号:3
ISSN号	0013-4651
DOI	10.1149/1945-7111/ac595b
通讯作者	Yuan,Xuwen() ; Yang,Huaiyu()
英文摘要	The 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.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:JES_169_3_031506
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173144]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yuan,Xuwen; Yang,Huaiyu
作者单位	1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China 2.Department of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, People’s Republic of China 3.School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, People’s Republic of China
推荐引用方式 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).
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).
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).