Application of Inorganic Silicon Sealer to Anodic Oxide Coating

摘要

The anodized film on aluminum-based materials can improve their corrosion resistance. Therefore, the surface treatment is very useful particularly for outdoor applications. When it is applied to some age hardened aluminum materials, the corrosion resistance is sometime deteriorated, and not improved by the conventional sealing. In this study, we applied an inorganic silicon sealer to anodized films for wrought Al-Cu, Al-Mg-Si and Al-Zn-Mg alloys and investigated their corrosion resistance by CASS test. Then we observed the corrosion characteristics by SEM-EDX etc. and discussed on the mechanism of corrosion and it's prevention by the silicon sealer.