Comparison of the degradation behaviour of fusion-bonded epoxy powder coating systems under flowing and static immersion

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	Comparison of the degradation behaviour of fusion-bonded epoxy powder coating systems under flowing and static immersion
	Y. H. Wei ; L. X. Zhang ; W. Ke
刊名	Corrosion Science
	2006
卷号	48 期号:6 页码:1449-1461
关键词	FBE powder coating EIS degradation flowing condition electrochemical impedance spectroscopy corrosion protection polymer-coatings metals steel eis
ISSN号	0010-938X
中文摘要	The degradation of three different fusion-bonded epoxy (FBE) powder coating systems under flowing and static immersion condition has been monitored using electrochemical impedance spectroscopy (EIS) when exposed to 3% NaCl aqueous solution at 60 degrees C. The aim of this project was to determine the impact of flowing condition on the degradation of the protective properties of polymer coatings during exposure to corrosive medium. Using a rotating cylinder apparatus, the immersion tests under the flowing condition were performed. The relative permittivity of coating, epsilon(r) = C-c delta/epsilon(0)A, where the coating capacitance C-c was calculated from the high frequency data of impedance spectrum, was selected as the index to monitor property variation with immersion time. Experimental results showed that the flowing condition aggravated the deterioration of coatings. The results were interpreted in terms of a model in which flowing condition changes coating/solution interface state and then accelerates the ions to diffuse through the coating. The electrochemical results were in agreement with the final visual observation. The present investigation suggests that flowing test provides an effective accelerating way to evaluate the degradation of coating system. (C) 2005 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000237879600010
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34560]
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	Y. H. Wei,L. X. Zhang,W. Ke. Comparison of the degradation behaviour of fusion-bonded epoxy powder coating systems under flowing and static immersion[J]. Corrosion Science,2006,48(6):1449-1461.
APA	Y. H. Wei,L. X. Zhang,&W. Ke.(2006).Comparison of the degradation behaviour of fusion-bonded epoxy powder coating systems under flowing and static immersion.Corrosion Science,48(6),1449-1461.
MLA	Y. H. Wei,et al."Comparison of the degradation behaviour of fusion-bonded epoxy powder coating systems under flowing and static immersion".Corrosion Science 48.6(2006):1449-1461.