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| Failure of Anodized Aluminum Corrosion Resistance Test |
| Received:April 04, 2018 Revised:July 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.07.004 |
| KeyWord:aluminum alloy sulfuric anodizing corrosion resistance |
| Author | Institution |
| ZHAO Yong-gang |
Shenyang Liming AERO-Engine Corporation Ltd., Shenyang , China |
| LYU Hong-jun |
Shenyang Liming AERO-Engine Corporation Ltd., Shenyang , China |
| ZENG Xiao-li |
Shenyang Liming AERO-Engine Corporation Ltd., Shenyang , China |
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| Abstract: |
| Objective To analyze causes for failure of sulfuric acid anodizing aluminum alloy corrosion resistance test. Methods Technological test was carried out from specimen, anodization process parameters, impurities in bath, etc. Results The failure of corrosion resistance test for sulfuric acid anodizing is not caused by a single reason, but by the joint action of defective specimen base material, high Cu2+ content of sulfur acid tank liquid and polluted closed slot liquid. Conclusion The specimen surface is intact and is free from damage or corrosion. After the specimen surface is cleaned thoroughly, control of sulfur acid tank liquid at Cu2+ 0.02 g/L or less, and closed tank liquid at Fe2+ 0.001 g/L or less, Al3+ 0.01 g/L or less, Zn2+ 0.0001 g/L or less, can obviously improve the quality of anodized film layer and improve the qualified rate of sulfuric acid anodizing corrosion resistance test. |
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