Electrochemical study of the corrosion behavior of Ce sealing of anodized 2024 aluminum alloy

被引：70
|
作者：
Yu, XW
Cao, CN
机构：
[1] Max Planck Inst Iron Res, Dept Interface Chem & Surface Engn, D-40237 Dusseldorf, Germany
[2] Chinese Acad Sci, Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
来源：
THIN SOLID FILMS | 2003年 / 423卷 / 02期
关键词：
aluminum alloy; anodic oxidation; cerium coating; corrosion;
D O I：
10.1016/S0040-6090(02)01038-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The technological process of Ce sealing of anodized LY12 (2024) alloy is introduced in this paper. The corrosion behavior of the film is studied by polarization curves and electrochemical impedance spectroscopy. The results show that the coating remains passive at the potential range from the open circuit potential (-780 mV) to -250 mV. After immersing the sample in NaCl solution for 6 days, the outer layer Ce conversion coating begins to loose its anticorrosive property. The inner Ce sealing anodized film is not corroded until 60 days immersion. Thus, the inner layer Ce sealing anodized film takes the leading role of the corrosion protection for LY12 alloy. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：252 / 256
页数：5
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