Studies on Deterioration Process of Organic Coatings Using EIS and SKP

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	Studies on Deterioration Process of Organic Coatings Using EIS and SKP
	W. Zhang; J. Wang; Z. Y. Zhao; J. Jiang
	2009
发表期刊	Chemical Journal of Chinese Universities-Chinese
ISSN	0251-0790
卷号	30 期号:4 页码:762-766
摘要	Deterioration process of the organic coatings on carbon steel substrate during exposure to 3.5% NaCl solution was investigated using the electrochemical impedance spectroscopy(EIS) and scanning Kelvin probe(SKP). According to the EIS and SKP responses, the entire deterioration process can be divided into three main stages shown as follows. Stage I was the water penetratioti into coatings. In this stage the EIS plots showed single semi-circel with the impedence of the coatings drops gradually and the Volta potential obtained by SKP keeps decreasing but the potential distribution remaines flat. Stage R was the corrosion initiation under coatings. In this stage the EIS plots changed from a single loop to double capacitive loops with the resistance of the coatings decreased sharply, at the same time the surface Volta potential difference of the metal surface increased rapidly. Stage M was the corrosion development and extension. The Nyquist plots of the electrochemical impedence showed a capacitive loop in the HF and a oblique line in the LF, with the potential difference remained in the high level. It was confirmed that the novel combination of EIS and SKP can complement and perfect each other to get more exact and credible details in studying the deterioration process of the organic coatings.
部门归属	[zhang wei; wang jia; jiang jing] ocean univ china, coll chem & chem engn, qingdao 266001, peoples r china. [wang jia] state key lab corros & protect, shenyang 110016, peoples r china. [zhao zeng-yuan] offshore oil engn qingdao co ltd, qingdao 266555, peoples r china.;wang, j (reprint author), ocean univ china, coll chem & chem engn, qingdao 266001, peoples r china;jwang@mail.ouc.edu.cn
关键词	Organic Coating Deterioration Electrochemical Impedance Spectroscopy(Eis) Scanning Kelvin Prove(Skp) Electrochemical Impedance Spectroscopy Polymeric Coatings Atmospheric Corrosion Steel Delamination Degradation Interface Mechanism
URL	查看原文
WOS记录号	WOS:000265665700025
引用统计	被引频次：6[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/321006/32570
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Zhang,J. Wang,Z. Y. Zhao,et al. Studies on Deterioration Process of Organic Coatings Using EIS and SKP[J]. Chemical Journal of Chinese Universities-Chinese,2009,30(4):762-766.
APA	W. Zhang,J. Wang,Z. Y. Zhao,&J. Jiang.(2009).Studies on Deterioration Process of Organic Coatings Using EIS and SKP.Chemical Journal of Chinese Universities-Chinese,30(4),762-766.
MLA	W. Zhang,et al."Studies on Deterioration Process of Organic Coatings Using EIS and SKP".Chemical Journal of Chinese Universities-Chinese 30.4(2009):762-766.