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

IMR OpenIR

	Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance
	Wang, C; Jiang, F; Wang, F
通讯作者	Wang, C()
	2004-03-01
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.
关键词	aluminum cerium conversion coating corrosion resistance electrochemistry scanning electronic microscopy x-ray photoelectron spectrum
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000220294800003
出版者	NATL ASSN CORROSION ENG
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81881
通讯作者	Wang, C
作者单位	Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, C,Jiang, F,Wang, F. Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance[J]. CORROSION,2004,60(3):237-243.
APA	Wang, C,Jiang, F,&Wang, F.(2004).Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance.CORROSION,60(3),237-243.
MLA	Wang, C,et al."Cerium chemical conversion coating for aluminum alloy 2024-T3 and its corrosion resistance".CORROSION 60.3(2004):237-243.