Abstract
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 (R b) of the barrier layers of BSAA decreases in greatest, while the R b 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.
| Original language | English |
|---|---|
| Pages (from-to) | 2031-2039 |
| Number of pages | 9 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 22 |
| Issue number | 7 |
| State | Published - Jul 2012 |
Keywords
- Adipic- sulfuric acid anodization
- Anodic films
- Boric-sulfuric acid anodization
- Chromic acid anodization
- LY12 aluminum alloy
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