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| Salt Spray Corrosion Resistance of Several Surface Protection Systems |
| Received:May 12, 2020 Revised:June 03, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.11.016 |
| KeyWord:corrosion surface protection salt spray test Al alloy |
| Author | Institution |
| LI Chao |
AVIC General Huanan Aircraft Industry Co. Ltd., Zhuhai , China |
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| Abstract: |
| The work aims to obtain a surface protection system with the best salt spray corrosion resistance by comparing the results of accelerated corrosion tests in the laboratory. Salt spray corrosion test was carried out by several different surface protection systems of 2024 aluminum alloy. The corrosion resistance of the surface protection system was analyzed and determined by the macroscopic corrosion morphology and the change in the loss rate of the coating to obtain a surface protection system with excellent corrosion resistance. According to the macroscopic corrosion morphology and gloss loss rate of the internal and external protection systems, the salt spray adaptability of alodine oxidation and three matching coating systems was poor. Chromic anodization + 10P4-X primer protection system is recommended to be used as the internal protection system and chromic anodization + 10P20-X primer + ECL topcoat protection system is recommended to be used as the external protection system. |
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