Preparation of Superhydrophobic Al Alloy for Metal Packaging and Study on Its Corrosion Resistance

摘要

At present, the studies of stability about aluminum alloy superhydrophobic surfaces are incomplete, the preparation process is required to simplify and the production cost is needed to reduce, it is difficult to obtained with durable microstructure and durable low surface energy materials on superhydrophobic surfaces simultaneously. The chemical and electrochemical methods are intended to construct rough surfaces on aluminum alloy in the paper. We have studied about superhydrophobic stability, the roughness, rough structure, micro-nanostructure arrangement and chemical composition in material surfaces by test equipments, in order to obtain an optimal model of rough structure on aluminium alloy surface. In this study, aluminum alloys with different surface roughness were prepared, then put the same surface coating materials on the aluminum alloy substrates, the corrosion resistance of different surface roughness on aluminum alloys were discussed. The results show that surface roughness increased can improve the corrosion resistance of aluminum alloy in weak acid, weak alkaline and salt solutions. When the contact angle is greater than 150°, the corrosion resistance of aluminum alloys has been improved greatly.