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
刊名	Acta Physico-Chimica Sinica
	2004
卷号	20 期号:1 页码:70-75
关键词	electrochemical impedance spectroscopy (EIS) transmission line physical meaning organic coating steel eis
ISSN号	1000-6818
中文摘要	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.
原文出处	://WOS:000188394000015
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35557]
专题	金属研究所_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.