Self-sealing anodization approach to enhance micro-Vickers hardness and corrosion protection of a die cast Al alloy
| Autor: | Moon Gab Kim, Yelim Kim, Hyungsop Yoon, Dong-Wha Park, Dongeun Lee, Chulho Lee, Kiyoung Lee, Jinsub Choi, Kiseok Oh |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.product_category Sodium aluminate Anodizing Alloy Metallurgy 02 engineering and technology General Chemistry Substrate (electronics) Electrolyte engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Corrosion chemistry.chemical_compound chemistry Vickers hardness test engineering Die (manufacturing) General Materials Science 0210 nano-technology business |
| Zdroj: | Journal of Physics and Chemistry of Solids. 103:87-94 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2016.12.005 |
| Popis: | Die cast, high-Si content ADC12 Al alloy samples were successfully anodized without surface cracks. This was accomplished with a 0.3 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. |
| Databáze: | OpenAIRE |
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