Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance

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	Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance
	C. Wang; F. Jiang; F. Wang
	2004
发表期刊	Corrosion
ISSN	0010-9312
卷号	60 期号:3 页码:237-243
摘要	New golden. yellow-colored cerium chemical conversion coatings on aluminum alloy 2024-T3 (AA2024-T3 [UN A92024]) surface at room temperature were obtained by immersing the alloy into a cerium solution containing zinc chloride (ZnCl2) and hydrogen peroxide (H2O2). Electrochemical methods and immersion tests were used to study the dynamics of the coatings formation and their corrosion resistance in 3.5% sodium chloride (NaCl) solution. The morphologies of the coatings were recorded by scanning electronic microscopy (SEM). Energy-dispersive x-ray (EDX) analysis and x-ray photoelectron spectroscopy (XPS) were used to analyze the chemical composition and the oxidation state of the elements in the coatings. Polarization experiments and immersion tests in 3.5% NaCl solution showed that the sensitivity to pitting corrosion for the conversion-coated AA2024-T3 was greatly lower than that of the untreated specimens, and the corrosion resistance improved markedly. SEM photographs showed that the coatings consisted of a lot of spherical particles. EDX and XPS experimental results showed that the coatings were made up of oxygen, cerium, and aluminum, and the spherical particles contained higher contents of cerium and oxygen than the other sites. Cerium was mainly in the form of Ce4+. The mechanisms of conversion coatings formation and improvement on corrosion resistance also are discussed.
部门归属	chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;wang, c (reprint author), chinese acad sci, state key lab corros & protect, inst met res, 62 wencui rd, shenyang 110016, peoples r china
关键词	Aluminum Cerium Conversion Coating Corrosion Resistance Electrochemistry Scanning Electronic Microscopy X-ray Photoelectron Spectrum X-ray-absorption Al-alloys Edge Spectroscopy Pitting Corrosion Protection Inhibition Surface Xps
URL	查看原文
WOS记录号	WOS:000220294800003
引用统计	被引频次：65[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/321006/35575
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Wang,F. Jiang,F. Wang. Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance[J]. Corrosion,2004,60(3):237-243.
APA	C. Wang,F. Jiang,&F. Wang.(2004).Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance.Corrosion,60(3),237-243.
MLA	C. Wang,et al."Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance".Corrosion 60.3(2004):237-243.