Research progress of microcapsule self-healing anticorrosive coatings

Abstract

Abstract During the long-term use of the coating, environmental factors, physical damage or other factors may cause micro-cracks in the coating. The expansion of microcracks will destroy the overall structure of the coating, reduce the protective effect of the coating and degrade its mechanical properties. However, the traditional repair methods need to consume a lot of manpower and material resources, and the micro-cracks in the coating are difficult to be repaired by the traditional external means. Inspired by biological systems, intelligent coatings with certain self-healing ability have attracted wide attention in academia and industry. According to the different remediation agents used in self-healing micro capsules, several common self-healing coating systems of micro capsules were analyzed, including corrosion inhibitor system, capsule drying oil system, capsule reactive repair agent system, etc.