With the continuous development of marine resources, metal corrosion has become a critical issue affecting the normal operation of equipment underwater, and it holds significant strategic importance for the long-term protection of offshore equipment. Self-healing coatings can autonomously repair damage and prevent the intrusion of corrosive media, providing long-lasting corrosion protection. Inspired by the mussel proteins in the ocean, a self-reporting and self-healing elastic biomimetic coating material, LP55-BPY, was designed based on dynamic disulfide bonds. Experimental results showed that LP55-BPY exhibits excellent mechanical properties, with a Young's modulus of 1.74 MPa and a puncture resistance of 976 mJ. The dynamic exchange of disulfide bonds in the main chain and the saturated structure endowed the material with good self-healing performance and resistance to solvent, with a healing efficiency of 92% after 5 h at room temperature. After damage, the bipyridyl groups in LP55-BPY could capture Fe³⁺ ions in the underwater environment, and the coordination crosslinking at the damaged site imparts self-coloring reporting and self-enhancing properties to the coating, facilitating wound repair. Additionally, LP55-BPY also demonstrated good recyclability and could be used for surface corrosion protection of offshore equipment.

самодиагностика; самовосстановление; материалы покрытия; координационная связь; дисульфидная связь