Electrochemical potential noise of 321 stainless steel stressed under constant strain rate testing conditions

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	Electrochemical potential noise of 321 stainless steel stressed under constant strain rate testing conditions
	Z. M. Shi; G. L. Song; C. N. Cao; H. C. Lin; M. Lu
	2007
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	52 期号:5 页码:2123-2133
摘要	An investigation was carried out on the features of potential electrochemical potential noise of stressed AISI321 stainless steel in solution 0.5 mol/L Na2SO4 + 5 x 10(-3) mol/L H2SO4 under constant-strain-rate-testing (CSRT) conditions. The results showed that the strained steel exhibited a white noise feature at low frequencies and the amplitude of potential fluctuation depended on elongation of the steel. Power spectral density (PSD) of the noise increased with increasing strain level. The noise level in the elastic region of the steel was relatively low, which increased with elongation. After the steel yielded, the electrochemical noise level became higher but it increased less significantly with increasing strain. In the fracture region, the potential noise reached the maximum level. In addition to the dependence of electrochemical noise on strain level, it was also found that the electrochemical noise level increased with increasing strain rate. To interpret the generation mechanism of electrochemical noise, a simple model was proposed based on an assumption that strain results in breakdown and repairing of the passive film on the steel. With this model, the dependence of electrochemical potential noise and its power spectral density on strain level and strain rate can be successfully explained. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	univ queensland, sch engn, brisbane, qld 4072, australia. chinese acad sci, inst metals res, state key lab corros & protect, shenyang 110016, peoples r china.;song, gl (reprint author), univ queensland, sch engn, brisbane, qld 4072, australia;g.song@minmet.uq.edu.au
关键词	Electrochemical Noise (Ecn) Passivity Stainless Steel Strain Corrosion Corrosion Cracking Stainless-steels Fluctuations Environments Initiation 304-stainless-steel Generation Chloride Alloy
URL	查看原文
WOS记录号	WOS:000243647700039
引用统计	被引频次：31[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/321006/33805
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. M. Shi,G. L. Song,C. N. Cao,et al. Electrochemical potential noise of 321 stainless steel stressed under constant strain rate testing conditions[J]. Electrochimica Acta,2007,52(5):2123-2133.
APA	Z. M. Shi,G. L. Song,C. N. Cao,H. C. Lin,&M. Lu.(2007).Electrochemical potential noise of 321 stainless steel stressed under constant strain rate testing conditions.Electrochimica Acta,52(5),2123-2133.
MLA	Z. M. Shi,et al."Electrochemical potential noise of 321 stainless steel stressed under constant strain rate testing conditions".Electrochimica Acta 52.5(2007):2123-2133.