Interpretation of electrochemical impedance spectroscopy in coating/metal system by CR transmission line model

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	Interpretation of electrochemical impedance spectroscopy in coating/metal system by CR transmission line model
	Q. X. Sun; J. Q. Zhang; C. J. Lin
	2004
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	20 期号:1 页码:70-75
摘要	According to the relationship between CR transmission line model (CR circuit) and QR circuit, an approach to calculate the initial value for fitting the former was found. Then, accurate values of its all elements could be obtained by using Z-View software. Based on the distribution of capacitance (C-i) and resistance (R-i) vs. characteristic frequency (f*), the function of the relative increment of its elements vs. the CPE (constant phase element)-power n could be drawn out. It showed that C-i value increased more quickly than that of R-i when n < 0. 5, so the physical meaning of n and its connection with the delamination at the coating/metal interface were interpreted from a new standpoint. As examples of application, the fit of several different types of electrochemical impedance spectroscopy, the inspection of the evolution of impedances in organic coating/metal system with time, discrimination of the effects of corrosion and delamination on the impedance, as well as the samultaneous estimation of capacitance and resistance of coating with various interspace from high impedance system were performed. Finally, the physical meaning of the CR circuit in organic coatings system was discussed for the heterogeneous characteristics of organic coating.
部门归属	zhejiang univ, dept chem, hangzhou 310013, peoples r china. chinese acad sci, met res inst, state key lab corros & protect met, shenyang 110016, peoples r china. xiamen univ, state key lab phys chem solid surfaces, xiamen 361005, peoples r china.;zhang, jq (reprint author), zhejiang univ, dept chem, hangzhou 310013, peoples r china;zjq@public1.zju.edu.cn
关键词	Electrochemical Impedance Spectroscopy (Eis) Transmission Line Physical Meaning Organic Coating Steel Eis
URL	查看原文
WOS记录号	WOS:000188394000015
引用统计	被引频次：3[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/321006/35557
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. X. Sun,J. Q. Zhang,C. J. Lin. Interpretation of electrochemical impedance spectroscopy in coating/metal system by CR transmission line model[J]. Acta Physico-Chimica Sinica,2004,20(1):70-75.
APA	Q. X. Sun,J. Q. Zhang,&C. J. Lin.(2004).Interpretation of electrochemical impedance spectroscopy in coating/metal system by CR transmission line model.Acta Physico-Chimica Sinica,20(1),70-75.
MLA	Q. X. Sun,et al."Interpretation of electrochemical impedance spectroscopy in coating/metal system by CR transmission line model".Acta Physico-Chimica Sinica 20.1(2004):70-75.