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	Electrochemical impedance spectroscopy of PEO coating on aluminum alloy in NaCl solution
	Guan Yong-Jun ; Xia Yuan
	2010-05-11 ; 2010-05-11
关键词	plasma electrolytic oxidation ceramic coating electrochemical impedance spectroscopy corrosion mechanism PLASMA ELECTROLYTIC OXIDATION CERAMIC COATINGS CORROSION Materials Science, Ceramics
中文摘要	Various Plasma Electrolytic Oxidation (PEO) ceramic coatings were prepared on LY12 aluminum alloy by adjusting the concentration of sodium silicate solution. Optical microscope (OM), XRD and EIS were used to study their morphology, composition and anti corrosion behavior in NaCl solution. Increasing concentration of sodium silicate leads to the increase of the total coating thickness while too high and too low concentration lead to the decrease of inner dense layer. The main composition of PEO coatings prepared in 20, 40 and above 60g/L concentration solution are correspondingly alumina, alumina with mullite, and amorphous phase. The corrosion resistance is determined by the inner dense layer. Increasing the thickness of inner dense layer can improve the anti-corrosion performance. PEO coating's corrosion resistance in acidic, alkaline and neutral NaCl solution is proved and the corrosion mechanism involved is also discussed.
语种	中文 ; 中文
出版者	SCIENCE CHINA PRESS ; BEIJING ; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/25387]
专题	清华大学
推荐引用方式 GB/T 7714	Guan Yong-Jun,Xia Yuan. Electrochemical impedance spectroscopy of PEO coating on aluminum alloy in NaCl solution[J],2010, 2010.
APA	Guan Yong-Jun,&Xia Yuan.(2010).Electrochemical impedance spectroscopy of PEO coating on aluminum alloy in NaCl solution..
MLA	Guan Yong-Jun,et al."Electrochemical impedance spectroscopy of PEO coating on aluminum alloy in NaCl solution".(2010).

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