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
	2006
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	48 期号:6 页码:1449-1461
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.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;wei, yh (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;yhwei@imr.ac.cn
关键词	Fbe Powder Coating Eis Degradation Flowing Condition Electrochemical Impedance Spectroscopy Corrosion Protection Polymer-coatings Metals Steel Eis
URL	查看原文
WOS记录号	WOS:000237879600010
引用统计	被引频次：17[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/321006/34560
专题	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.