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| Effect of Substrate Surface State on Adhesion of Silane Epoxy Hybrid Resin Coating/2024 Aluminium Alloy |
| Received:September 27, 2015 Revised:February 15, 2016 |
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| DOI：10.7643/issn.1672-9242.2016.01.003 |
| KeyWord:silane epoxy hybrid resin coating pretreatment adhesion surface energy roughness |
| Author | Institution |
| WANG Hao-wei |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
| MU Xian-lian |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
| LIU Cheng-chen |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory，China Special Vehicle Reach Institute，Jingmen ，China |
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| Abstract: |
| Objective To study influencing pattern of different surface states on adhesion between silane hybrid epoxy resin coating/2024 aluminium alloy. Methods In combination with the comprehensive performance of silane hybrid epoxy resin coating and actual application, four kinds of common pretreatment ways were chosen to change the substrate surface state. The drawing tester was used to test adhesion between coating/substrate on different substrate surface states (substrate surface pH value, surface roughness of substrate, substrate surface energy), the relationship of the substrate surface state and the adhesion between coating/substrate was studied. Results The state and shape of substrate surface can affect coating adhesion and the root causes of affecting were substrate surface energy, substrate surface pH, and substrate surface roughness. Conclusion For silane hybrid epoxy resin coating, the surface treatment methods of hot alkali cleaning can substitute for traditional chromate passivation. When the silane hybrid resin coating epoxy coating thickness was 30 μm, the substrate surface roughness of the aluminium alloy can be controlled as Ra= 4.75 μm to ensure good adhesion, and the coating adhesion value was 8.84 MPa. |
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