Electrochemical measurements using combination microelectrode in crevice simulating disbonded of pipeline coatings under cathodic protection

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	Electrochemical measurements using combination microelectrode in crevice simulating disbonded of pipeline coatings under cathodic protection
	M. C. Yan; J. Q. Wang; E. H. Han; W. Ke
	2007
发表期刊	Corrosion Engineering Science and Technology
ISSN	1478-422X
卷号	42 期号:1 页码:42-49
摘要	A novel combination microelectrode was constructed based on an iridium pH microelectrode and an Ag/AgCl microelectrode, and was applied to simultaneously monitor the steel potential, pH and chloride ion concentration in a crevice simulating disbonding of pipeline coatings with cathodic protection ( CP) applied or removed. The sensing characteristics and sensitivity of the microelectrode are described as well as the calibration procedures. A simulated crevice was formed between a pipeline steel surface and a polymethylmethacrylate plate. The results showed that in CP conditions, the evident potential gradient resulting from the IR potential drop was concentrated at the crevice opening. A protective local environment induced by CP under disbonded coatings was characterised by an increase in pH and removal of Cl-. After CP is removed, the protective effects can persist for a period of time, depending on the diffusion of soluble species.
部门归属	chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china.;wang, jq (reprint author), chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china;jiqwang@imr.ac.cn
关键词	Cathodic Protection Crevice Corrosion Microelectrode Polarisation Potential Distribution Stress Corrosion Cracking Reference Electrode Antimony Electrode Buried Pipelines Corrosion Ph Steel Surfaces Chloride
URL	查看原文
WOS记录号	WOS:000245494100007
引用统计	被引频次：41[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/321006/33964
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. C. Yan,J. Q. Wang,E. H. Han,et al. Electrochemical measurements using combination microelectrode in crevice simulating disbonded of pipeline coatings under cathodic protection[J]. Corrosion Engineering Science and Technology,2007,42(1):42-49.
APA	M. C. Yan,J. Q. Wang,E. H. Han,&W. Ke.(2007).Electrochemical measurements using combination microelectrode in crevice simulating disbonded of pipeline coatings under cathodic protection.Corrosion Engineering Science and Technology,42(1),42-49.
MLA	M. C. Yan,et al."Electrochemical measurements using combination microelectrode in crevice simulating disbonded of pipeline coatings under cathodic protection".Corrosion Engineering Science and Technology 42.1(2007):42-49.