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

IMR OpenIR

	Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy; Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy
	H. W. Shi; F. C. Liu; E. H. Han
	2010 ; 2010
发表期刊	Materials Chemistry and Physics ; Materials Chemistry and Physics
ISSN	0254-0584 ; 0254-0584
卷号	124 期号:1 页码:291-297
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.; 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.
部门归属	[shi, hongwei; liu, fuchun; han, enhou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;han, eh (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;ehhan@imr.ac.cn ; [shi, hongwei; liu, fuchun; han, enhou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;han, eh (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;ehhan@imr.ac.cn
关键词	Electrochemical Impedance Spectroscopy Electrochemical Impedance Spectroscopy Sol-gel Coatings Sol-gel Coatings Corrosion Corrosion X-ray Photoelectron Spectroscopy X-ray Photoelectron Spectroscopy Self-healing Properties Self-healing Properties Galvanized Steel Galvanized Steel Silane Solutions Silane Solutions Protection Protection Inhibition Inhibition Pretreatments Pretreatments Spectroscopy Spectroscopy
URL	查看原文 ; 查看原文
WOS记录号	WOS:000282607900058 ; WOS:000282607900058
引用统计	被引频次：73[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/321006/31437
专题	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, Corrosion behaviour of sol-gel coatings doped with cerium salts on 2024-T3 aluminum alloy[J]. Materials Chemistry and Physics, Materials Chemistry and Physics,2010, 2010,124, 124(1):291-297, 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.