Multifunctional Anticorrosion Epoxy Coatings With Liquid Repellency, Diffusion Resistance, and Thermal Self‐Healing

ABSTRACT Self‐healing dual‐phobic anticorrosive coatings can simultaneously enhance the liquid repellency and service life of materials, which is of great significance for long‐term protection of metal surfaces. Since coating damage easily destroys the barrier layer and micro‐nano structures, the liquid‐repellent performance cannot be fully restored. The preparation of coatings that possess both dual repellency, self‐repair, and long‐lasting corrosion resistance still faces challenges. This paper prepares MS‐GO microspheres via acid reflux etching and hydrothermal method, grafts KH560 and fluor silane to produce hierarchical rough, low‐surface‐energy PF‐KMS‐GO fillers; synthesizes epoxy resin matrix containing dynamic disulfide bonds using bisphenol disulfide. The coating exhibits the best overall performance with a filler content of 10 wt.%, with water and oil contact angles of 116° and 109°, respectively; scratches can be healed and the dual‐phobic properties restored after heating at 80°C for 25 min, and it still maintains stable barrier and excellent corrosion resistance after long‐term immersion in 3.5% NaCl solution. This study offers a new design idea for making highly durable, self‐healing dual‐phobic anti‐corrosion coatings by combining low surface energy fillers, 2D barrier phases, and dynamic cross‐linked networks. It is expected to expand its applications in marine equipment, metal components, and other corrosion conditions.