Future Perspective of Self-Healing Nano-Coatings for Corrosion Protection

Abstract

Self-healing coating (SHC) can repair the physical damage or return functionality with little to no interference. An in-depth and up-to-date discussion of the advantages and disadvantages of self-healing processes in organic coatings that prevent corrosion is provided in this literature review. Self-healing mechanisms are frequently facilitated by incorporating corrosion inhibitors or healing agents into the coating matrices. Heat or light from the environment can activate non-autonomous processes to promote healing by starting the necessary chemical reactions or physical changes that lead to the movement of molecules in chains or create bonds. Previous studies on self-healing coating have focused on minor damage mechanisms, like a localized abrasion or puncture, and have only addressed coatings' barrier or corrosion prevention qualities. Future-generation SHC are expected to be more intelligent and able to repair complex and physical damages in addition to surface/interfacial, mechanical, and functional qualities.