Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12

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	Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12
	X. W. Yu; C. N. Cao; Z. M. Yao; D. R. Zhou; Z. D. Yin
	2000
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	284 期号:1-2 页码:56-63
摘要	The processes of the double layer rare earth metal (REM) conversion coating on aluminum alloy LY12 (2024) were introduced. The results of polarization tests showed that the corrosion resistance of the double layer REM conversion coating was superior to that of chromate conversion coating. The corrosion behavior of REM conversion coatings on LY12 alloy was studied with optical microscopy and energy dispersive spectroscopy (EDS). The results showed that in NaCl solution, pits initiated on the coatings formed on Cu-rich intermetalics. According to the equivalent circuit of pitting, a new method for analyzing the pit growth of REM conversion coatings was put forward by employing electrochemical impedance spectroscopy (EIS). Transmission line W in equivalent circuit could be neglected in short term exposure of REM conversion coatings to NaCl solution. This led to a formula for calculating the area fraction of pitting (F) on the surface of REM conversion coatings by simplifying the equivalent circuit. (C) 2000 Elsevier Science S.A. All rights reserved.
部门归属	chinese acad sci, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china. harbin inst technol, harbin 150001, peoples r china.;yu, xw (reprint author), chinese acad sci, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china
关键词	Ly12 Alloy Rem Conversion Coatings Corrosion Behavior Electrochemical Impedance Spectroscopy (Eis) Equivalent Circuit Film-forming Inhibitors Surface Modification Stainless Aluminum Protection
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WOS记录号	WOS:000086906500007
引用统计	被引频次：47[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/321006/37236
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. W. Yu,C. N. Cao,Z. M. Yao,et al. Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2000,284(1-2):56-63.
APA	X. W. Yu,C. N. Cao,Z. M. Yao,D. R. Zhou,&Z. D. Yin.(2000).Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,284(1-2),56-63.
MLA	X. W. Yu,et al."Corrosion behavior of rare earth metal (REM) conversion coatings on aluminum alloy LY12".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 284.1-2(2000):56-63.