| ZHAO Hai-yan,WEI Xiao-wei,YANG Fan,HUANG Ling,LUO Ting.Growth and Characteristics of Hard Anodic Oxidization Film with Low Sulfuric Concentration for Aluminum Alloy[J],43(3):43-47 |
| Growth and Characteristics of Hard Anodic Oxidization Film with Low Sulfuric Concentration for Aluminum Alloy |
| Received:December 29, 2013 Revised:February 09, 2014 |
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| DOI： |
| KeyWord:aluminum alloy 6063 anodic oxidization sulfuric acid electrolyte growth microcosmic feature |
| Author | Institution |
| ZHAO Hai-yan |
School of Materials Science and Engineering, Xihua University, Chengdu , China |
| WEI Xiao-wei |
School of Materials Science and Engineering, Xihua University, Chengdu , China |
| YANG Fan |
School of Materials Science and Engineering, Xihua University, Chengdu , China |
| HUANG Ling |
School of Materials Science and Engineering, Xihua University, Chengdu , China |
| LUO Ting |
School of Materials Science and Engineering, Xihua University, Chengdu , China |
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| Abstract: |
| Objective To study the growth and characteristics of hard anodic oxidization film with low sulfuric concentration for aluminum alloy. Methods The hard anodic oxidization of aluminum alloy 6063 was performed in the electrolyte with 3% H2SO4 and 18% H2SO4 ( mass fraction) , the voltage-time curve and microstructure in the film growth process were analyzed to study the characteristics of the growth of the films. Results In the electrolyte with low sulfuric concentration, the oxidation film grew to " Preferential Growing Mode for Oxidation Film" at the initial stage. At the site of high surface energy defect, the oxidation film core formed continuously and spread out until met and formed the interface; at later stage, the oxidation film grew to " Preferential Growing Mode for Oxidation Film Interface" and was eroded continuously on the thinner oxidation film interface to produce the reverse conveying of Al3+ and O2-, which thickened the oxidation film. Conclusion The growth manner of anodic oxidization film at low sulfuric concentration was obviously different from the traditional one. The film was denser and the thickness, hardness and roughness of the film were greater. |
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