Enhancement of corrosion performance of epoxy coatings by chemical modification with GPTMS silane monomer

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	Enhancement of corrosion performance of epoxy coatings by chemical modification with GPTMS silane monomer
	W. G. Ji; J. M. Hu; L. Liu; J. Q. Zhang; C. N. Cao
	2008
发表期刊	Journal of Adhesion Science and Technology
ISSN	0169-4243
卷号	22 期号:1 页码:77-92
摘要	In this paper, commercial epoxy resin was chemically modified by different amounts of 3-glycidoxypropyltrimethoxysilane (GPTMS) monomer using an organotin compound as catalyst, aiming to improve the anti-corrosion performance of epoxy coatings on 2024-T3 aluminum alloy substrate. Electrochemical impedance spectroscopy (EIS) was used to evaluate the barrier properties against water permeation and protectiveness of silane-modified epoxy coatings. The results showed that all the modified coatings presented higher barrier performance and better corrosion perfon-nance than pure epoxy coating, which were characterized by higher charge transfer resistance (R-ct) and lower double-layer capacitance (C-dl) at the electrolyte/metal interface. The improvements in corrosion performance and wet adhesion of modified epoxy coatings were also observed by the Machu test and boiling water test, respectively. Interestingly, it was found that the glass-transition temperature (T-g) of silane-modified epoxy coatings decreased only slightly during immersion in 3.5 wt% NaCl solution, in contrast with pure epoxy coating, which was observed to decrease significantly after water permeation. The corrosion performance of epoxy coatings was, thus, improved when the amount of chemically grafted silane monomer increased in the content range investigated in the present work. (c) Koninklijke Brill NV, Leiden, 2008.
部门归属	[ji, wei-gang; hu, ji-ming; liu, liang; zhang, jian-qing; cao, chu-nan] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang, jian-qing; cao, chu-nan] state key lab corros & protect, shenyang 110016, peoples r china.;hu, jm (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;kejmhu@zju.edu.cn
关键词	Epoxy Coatings 3-glycidoxypropyltrimethoxysilane (Gptms) Chemical Modification Corrosion Performance Electrochemical Impedance Spectroscopy Metal Pretreatments Coated Metals Aa 2024-t3 Aluminum Protection Steel Films Degradation Resistance
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WOS记录号	WOS:000255554500006
引用统计	被引频次：19[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/321006/32842
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. G. Ji,J. M. Hu,L. Liu,et al. Enhancement of corrosion performance of epoxy coatings by chemical modification with GPTMS silane monomer[J]. Journal of Adhesion Science and Technology,2008,22(1):77-92.
APA	W. G. Ji,J. M. Hu,L. Liu,J. Q. Zhang,&C. N. Cao.(2008).Enhancement of corrosion performance of epoxy coatings by chemical modification with GPTMS silane monomer.Journal of Adhesion Science and Technology,22(1),77-92.
MLA	W. G. Ji,et al."Enhancement of corrosion performance of epoxy coatings by chemical modification with GPTMS silane monomer".Journal of Adhesion Science and Technology 22.1(2008):77-92.