| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5447392 | Journal of Physics and Chemistry of Solids | 2017 | 8 Pages |
Abstract
Die cast, high-Si content ADC12 Al alloy samples were successfully anodized without surface cracks. This was accomplished with a 0.3Â M sulfuric acid electrolyte with a high concentration of sodium aluminate. During anodization, the AlO2- anions were attracted to the positively-charged Al substrate and deposited in the cracks formed by un-oxidized Si islands within the ADC12. Anodic films prepared in electrolytes with a high concentration of AlO2- drastically enhanced surface morphology, thickness uniformity, Vickers hardness, and corrosion behavior in comparison with anodic film prepared without AlO2- concentration. The simultaneous sealing mechanism by AlO2- anions during anodization is reported in detail.
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Authors
Chulho Lee, Kiseok Oh, Dongeun Lee, Yelim Kim, Hyungsop Yoon, Dong-Wha Park, Moon Gab Kim, Kiyoung Lee, Jinsub Choi,