Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements

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	Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements
	Q. X. Sun ; J. Q. Zhang ; C. H. Lin
刊名	Acta Physico-Chimica Sinica
	2004
卷号	20 期号:11 页码:1297-1302
关键词	electrochemical impedance spectroscopy (EIS) transmission line interfacial adhesion organic coating A(3) steel electrochemical impedance spectroscopy protective organic coatings corrosion behavior galvanized steel aluminum-alloys epoxy coatings coated metals performance pretreatment system
ISSN号	1000-6818
中文摘要	According to the experimental results and the basic concept that the capacitive contribution of the coating/metal system to EIS can reflect the change occurring at interface sensitively, the quantitative relationship between the adhesion and the analytical result of EIS is established. The approach is using the transmission line model (CR circuit) to obtain the discrete capacitance values, analyzing the physical meaning of the slope at the region in which the discrete capacitances change linearly with the discrete characteristic frequency. The data handling method is also given in detail. The relationship is validated by experiments. The results show that under certain conditions, the slopes are mainly determined by the speed of instantaneous delamination at organic coating/metal interface and are not influenced by the corrosion product built up at the artificial defect, so they have good reproducibility despite the EIS of duplicate samples showing very different configuration. The analytical results from EIS are often higher than that of mechanical measurements when adhesion is strong. Explanation of the discrepancy shows that the results from EIS are more accurate and reasonable. In regard to epoxy powder paints and A(3) steel, the results also indicate that the pretreatment of substrate using silane with and without hot-dip galvanized or phosphate treatment can influence markedly the adhesion between substrate and coating.
原文出处	://WOS:000225381400003
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/35556]
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. H. Lin. Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements[J]. Acta Physico-Chimica Sinica,2004,20(11):1297-1302.
APA	Q. X. Sun,J. Q. Zhang,&C. H. Lin.(2004).Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements.Acta Physico-Chimica Sinica,20(11),1297-1302.
MLA	Q. X. Sun,et al."Quantitatively predicate state of adhesion between coating/metal interface by EIS measurements".Acta Physico-Chimica Sinica 20.11(2004):1297-1302.