Electrochemical repairing of pitted 18-8 stainless steel

IMR OpenIR

	Electrochemical repairing of pitted 18-8 stainless steel
	H. P. Duan; Y. C. Li; C. W. Yan
	2005
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	40 期号:11 页码:2911-2917
摘要	In order to clarify the reaction essential of electrochemical repairing method, which was developed to repair the passive film on pits and suppress pitting corrosion on passive 18-8 stainless steel (18-8ss) after occurrence of pitting, the electrochemical characteristics, morphology and composition of passive film after different treatments were investigated by electrochemical impedance spectroscopy (EIS), Cyclic Voltammogram (CV), Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The dynamic behavior of reactions occurred at lower potential (E-L = - 200 mV) and higher potential (E-H = 1000 mV) of alternating electric filed was discussed respectively and the correlation between those reactions was analyzed. Based on above results, reaction essence of electrochemical repairing for pitted 18-8ss electrode was proposed: during the periodic action of alternating current, recycle reactions take place on the surface and the pit area of pitted electrode, i. e., metal dissolves into cations (occurs at E-L) and form hydrous hydroxide, the hydrous hydroxide turns into metal oxide ( occurs at E-H), a 'bipolar mode' passive film forms and Cr content is increased in repaired passive film. At the pit area, enclosed state of the pit is destroyed by the perturbing effect of alternating current in 1.0 M H2SO4 solution, thus the pit area will be repaired through above-mentioned process. (C) 2005 Springer Science + Business Media, Inc.
部门归属	chinese acad sci, grad sch, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;yan, cw (reprint author), chinese acad sci, grad sch, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;hpduan@imr.ac.cn cwyan@imr.ac.cn
关键词	Active-passive Transition Stainless-steel Transpassive Dissolution Sulfate-solutions Pitting Corrosion Colored Film Ac Corrosion Pulse Method Mild-steel Polarization
URL	查看原文
WOS记录号	WOS:000229878400022
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34838
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. P. Duan,Y. C. Li,C. W. Yan. Electrochemical repairing of pitted 18-8 stainless steel[J]. Journal of Materials Science,2005,40(11):2911-2917.
APA	H. P. Duan,Y. C. Li,&C. W. Yan.(2005).Electrochemical repairing of pitted 18-8 stainless steel.Journal of Materials Science,40(11),2911-2917.
MLA	H. P. Duan,et al."Electrochemical repairing of pitted 18-8 stainless steel".Journal of Materials Science 40.11(2005):2911-2917.