Develop a Durable Self-Healing Anticorrosion Coating Through a Combined Approach of Passive Cl- Blocking and Active Cl- Capture

Abstract

Metal facilities in marine environments are prone to chloride-induced corrosion. An effective strategy to mitigate this issue involves applying organic coatings to metal surfaces. However, these coatings may frequently fail due to external damage. In this study, a multifunctional filler (LDH@GO) was designed to augment the performance of epoxy resins. The coating developed herein demonstrates exceptional protective characteristics, with a maximum tensile strength of 5.424 MPa and a stable electrochemical impedance of 1.1×108 Ω·cm² even after 15 days of immersion. This research lays the foundation for the development of intelligent coatings with corrosion protection and chloride sequestration capabilities.

Keywords: Chloride ion capture, self-healing coating, Corrosion protection, passive/active property