Self-healing Coating by Using Pore of Porous Film Formed on Al Alloy Anodized and Effect of Pore-size on Self-healing Property of Coating

Abstract

In this study, economic and advanced coating with self-healing property for corrosion protection of Al alloy were developed. This coating can be formed on Al alloy by following procedure. The porous type of anodic oxide film was formed on Al alloy surface and pores of porous film were filled with a healing agent of coating. And then, the polyurethane coating was formed on this surface. From results of this study, it is clear that the scar formed on the specimen surface covered with this self-healing coating, by damaging mechanically, was covered by self-healing structure. This structure may form by the reaction between healing agent and vapor in air. Corrosion protection of the specimen covered with this coating, can also be kept high by the self-healing property of this coating, if this coating was damaged.