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| Effect of Surface Treatment on Acid Salt Spray Corrosion Resistance of 2A12 Aluminum Alloy |
| Received:July 18, 2024 Revised:September 12, 2024 |
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| DOI：10.7643/issn.1672-9242.2025.01.010 |
| KeyWord:2A12 aluminum alloy surface treatment acid salt spray anodizing coating corrosion resistance |
| Author | Institution |
| CHEN Mengjie |
AECC Beijing Institute of Aeronautical Materials, Beijing , China |
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| Abstract: |
| The work aims to identify effective surface treatment methods for the 2A12 aluminum alloy to enhance its corrosion resistance in typical corrosive environments such as acidic salt spray. Surface treatments including chromic acid anodizing, sulfuric acid anodizing, and malic acid anodizing were applied to the 2A12 aluminum alloy, followed by application of three different types of coatings for corrosion protection. Evaluation was conducted according to GJB150.11A-2009 standard through acid salt spray tests. Chromic acid anodizing and two of the coating systems did not withstand acid salt spray corrosion. Sulfuric acid anodizing and tartaric acid anodizing exhibited good resistance to acid salt spray corrosion, especially with acrylic polyurethane/fluoropolyurethane coating systems showing excellent performance. Sulfuric acid anodizing followed by application of acrylic polyurethane/fluoropolyurethane coatings effectively enhances the corrosion resistance of 2A12 aluminum alloy. |
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