Properties of aluminum alloy anodic films formed in three kinds of solutions

被引：0
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作者：
Liu, Jian-Hua [1 ]
Liu, Zhou [1 ]
Yu, Mei [1 ]
Li, Song-Mei [1 ]
Chen, Gao-Hong [1 ]
机构：
[1] School of Materials Science and Engineering, Beihang University, Beijing 100191, China
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2012年 / 22卷 / 07期
关键词：
Aluminum alloys - Sulfuric acid - Aluminum corrosion - Corrosion fatigue - Boric acid - Metallic films - Corrosion resistance - Electrochemical corrosion - Fatigue testing - Sodium chloride;
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摘要：
The properties of anodic films formed in chromic, boric-sulfuric and adipic-sulfuric acid (CAA, BSAA and ASAA, respectively) on LY12 aluminum alloy were studied by morphology characterization, current-voltage response test, electrochemical impedance spectroscopy (EIS) and fatigue test methods. It is indicated that in contrast with BSAA film, CAA and ASAA films have less defects and a smoother periphery. All of three kinds of anodic films have perfect corrosion resistant after immersed in 5% NaCl solution for 80 d. The resistance value (Rb) of the barrier layers of BSAA decreases in greatest, while the Rb values of CAA and ASAA decrease by 75% and 78%, respectively. From fatigue test results, it is confirmed that CAA reduces the fatigue life of the matrix at a little, about 14%, ASAA, about 20%, and BSAA about 25%, indicating that BSAA has the greatest impact on the fatigue life of the matrix among the three treatments.
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页码：2031 / 2039
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