Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy

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	Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy
	H. W. Shi ; F. C. Liu ; E. H. Han
刊名	Materials Chemistry and Physics
	2010
卷号	124 期号:1 页码:291-297
关键词	Electrochemical impedance spectroscopy Sol-gel coatings Corrosion X-ray photoelectron spectroscopy self-healing properties galvanized steel silane solutions protection inhibition pretreatments spectroscopy
ISSN号	0254-0584
中文摘要	The corrosion behaviour of the sol-gel coatings doped with cerium chloride or cerium nitrate on 2024-T3 aluminum alloy was investigated by using electrochemical impedance spectroscopy (EIS) and immersion tests. The sol-gel matrix was obtained through hydrolysis, condensation of 3-glycidoxypropyltrimethoxysilane (GPTMS) and tetramethoxysilane (TMOS), using diethylentriamine as curing agent. The results indicated that cerium nitrate with concentration of 1 x 10(-3) mol L(-1) in the silane solution was excellent on self-healing for the sol-gel coating, while cerium chloride had no obvious effect. This result suggested that the introduction of Cl(-) promoted the under-film pitting of 2024-T3 substrate. It was found that Ce(OH)(3) and Ce(OH)(2)(2+) simultaneously existed in the silane solution by X-ray diffraction (XRD) analysis. Ce(OH)(2)(2+) transformed to CeO(2) due to high-temperature curing of sol-gel matrix demonstrated by X-ray photoelectron spectroscopy (XPS) analysis. Therefore, it can be considered that Ce(OH)(3) and CeO(2) played inhibition roles in the corrosion process of the sol-gel coatings. (C) 2010 Elsevier B.V. All rights reserved.
原文出处	://WOS:000282607900058
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31437]
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	H. W. Shi,F. C. Liu,E. H. Han. Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy[J]. Materials Chemistry and Physics,2010,124(1):291-297.
APA	H. W. Shi,F. C. Liu,&E. H. Han.(2010).Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy.Materials Chemistry and Physics,124(1),291-297.
MLA	H. W. Shi,et al."Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy".Materials Chemistry and Physics 124.1(2010):291-297.