Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique

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	Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique
	C. Cai; Z. Zhang; F. H. Cao; Z. N. Gao; J. Q. Zhang; C. N. Cao
	2005
发表期刊	Journal of Electroanalytical Chemistry
ISSN	0022-0728
卷号	578 期号:1 页码:143-150
摘要	The potential electrochemical noise (EN) measurements in conjunction with the scanning electron microscopy (SEM) technique have been used to study the corrosion behavior of pure aluminum in neutral 3.0 wt% sodium chloride solution. EN information on the evolution of pitting corrosion over a period of five days has been obtained and analyzed with a wavelet transform technique. The results show that the EN signal was composed of a distinct type of events characterized by small scaling values, i.e., their time constants, and the wavelet transform technique is a useful alternative tool to overcome the limitations of FFT. Meanwhile, it is found that the energy distribution plots (EDP) can be used as "fingerprints" of EN signals, and good correspondence between the characteristics of EDP and the material corrosion type/severity has been obtained. Finally, the relationship between the EN features and the corrosion morphologies has been elucidated according to the "autoacceleration" and "cathodic protection" mechanisms of the corrosion process. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. ningxia univ, dept chem, key lab energy sources & chem engn, yinchuan 750021, peoples r china. chinese acad sci, met res inst, state key lab corros & protect met, shenyang 110016, peoples r china.;zhang, z (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;eaglezzy@zjuem.zju.edu.cn
关键词	Pure Aluminum Pitting Corrosion Electrochemical Noise Wavelet Analysis Electrochemical Noise Aluminum Transform Iron
URL	查看原文
WOS记录号	WOS:000228430400018
引用统计	被引频次：89[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/321006/34795
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Cai,Z. Zhang,F. H. Cao,et al. Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique[J]. Journal of Electroanalytical Chemistry,2005,578(1):143-150.
APA	C. Cai,Z. Zhang,F. H. Cao,Z. N. Gao,J. Q. Zhang,&C. N. Cao.(2005).Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique.Journal of Electroanalytical Chemistry,578(1),143-150.
MLA	C. Cai,et al."Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique".Journal of Electroanalytical Chemistry 578.1(2005):143-150.