Preparation of fully epoxy resin microcapsules and their application in self-healing epoxy anti-corrosion coatings

Herein, an innovative self-healing epoxy coating with outstanding corrosion resistance has been developed. The self-healing capability of the coating is achieved by embedding microcapsules, comprising of solidified epoxy resin as the outer layer and liquid epoxy resin as the inner content. The chemical composition of the microcapsule wall is identical to that of the coating substrate, it is equivalent to injecting the liquid repair agent directly into the coating. Remarkably, due to the absence of any additional components in the coating system, the microcapsules seamlessly integrate with the resin matrix of the coating, showcasing exceptional compatibility.