Self-Healing Coat for Corrosion Resistance of Metal with Micro-Capsules Dispersed

Abstract

In a previous study, self-healing polyurethane coatings with microcapsules containing the high reactive liquid phase have been developed for the protection of metal from corrosion for long periods. In this study, we examine the effect of the amount of glycerol added in the microcapsule formation process on the shape of capsules and the self-healing ability of coatings with microcapsules. The capsule formation with large amounts of glycerol gave rise to clusters of capsules, while with small amounts of glycerol, the capsules were mainly independent ones. The self-healing property of the coatings was more remarkable with decreasing the amount of glycerol in the capsule formation process.