Electrochemical characteristics of corrosion behavior of organic/Dacromet composite systems pretreated with gamma-aminopropyltriethoxysilane

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	Electrochemical characteristics of corrosion behavior of organic/Dacromet composite systems pretreated with gamma-aminopropyltriethoxysilane
	J. G. Liu; C. W. Yan
	2006
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	200 期号:16-17 页码:4976-4986
摘要	The corrosion behavior of four organic/Dacromet composite systems, namely three solvent-borne coatings, polyurethane, alkyd and fluorinated polymer as well as a water-borne coating, styrene-acrylate emulsion, was studied after pretreatment with gamma-aminopropyltriethoxysilane (gamma-APTS). Electrochemical experiment in 3.5% NaCl solution and scanning electron microscopy (SEM) were performed. The results showed that: (1) gamma-APTS treatment increased the polarization resistance but decreased the total impedance of the corrosion reaction contrast to the untreated Dacromet after immersion for a period. (2) The silane pretreatment significantly influenced the corrosion behavior of the organic/Dacromet composite systems mainly through restraining the corrosion of the substrate (Dacromet) by the reduction of the active surface (due to the barrier effect of surface film), which was confirmed by EIS experiments under anodic polarization. (3) Pretreatment with gamma-APTS improved the protective performance of the polyurethane and alkyd/Dacromet composite systems. However, a conversion evolution between the untreated and the pretreated water-borne styrene-acrylate emulsion composite system appeared due to the particular interfacial effect. (4) Parameter Z vertical bar(0.1 Hz) and f(b) in the studied systems manifested a mathematical correlation and the constant K=log (Z vertical bar(0.1 Hz)/fb) could be used in protective performance evaluation for various coatings on substrates. (c) 2005 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, state key lab corros & protect, inst met res, grad sch, shenyang 110016, peoples r china.;liu, jg (reprint author), chinese acad sci, state key lab corros & protect, inst met res, grad sch, 62 wencui rd, shenyang 110016, peoples r china;jgliu@imr.ac.cn
关键词	Dacromet Eis Corrosion Behavior Organic Coating Composite Gamma-apts Pretreatment Coating Deterioration Organic Coatings Aa 2024-t3 Steel Impedance Aluminum Resistance Protection Eis
URL	查看原文
WOS记录号	WOS:000236590300042
引用统计	被引频次：14[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/321006/34361
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. G. Liu,C. W. Yan. Electrochemical characteristics of corrosion behavior of organic/Dacromet composite systems pretreated with gamma-aminopropyltriethoxysilane[J]. Surface & Coatings Technology,2006,200(16-17):4976-4986.
APA	J. G. Liu,&C. W. Yan.(2006).Electrochemical characteristics of corrosion behavior of organic/Dacromet composite systems pretreated with gamma-aminopropyltriethoxysilane.Surface & Coatings Technology,200(16-17),4976-4986.
MLA	J. G. Liu,et al."Electrochemical characteristics of corrosion behavior of organic/Dacromet composite systems pretreated with gamma-aminopropyltriethoxysilane".Surface & Coatings Technology 200.16-17(2006):4976-4986.