Abstract: Ultraviolet (UV) irradiation and coupled environmental degradation cause premature failure of marine coatings, thereby exacerbating metal corrosion processes. Developing coatings that integrate both weather resistance and durability remains a significant yet challenging endeavor. Herein, we report a multifunctional intelligent coating (GO-HHU-T-EP) through the triple synergistic incorporation of graphene oxide (GO), cerium-based metal-organic framework (HHU), and Tinuvin 1130 (T). The GO-HHU-T heterostructure is synthesized via a facile and sustainable strategy. Density functional theory (DFT) and molecular dynamics (MD) simulations reveal that the GO-HHU-T composite with excellent dispersibility significantly enhances the coating’s compactness. Given its UV absorption and radical scavenging mechanisms, GO-HHU-T-EP coating maintains structural integrity with 95.9 % and 80.9 % retention of tensile strength and interfacial adhesion after UV aging. Furthermore, GO-HHU-T-EP coating confirms outstanding corrosion resistance (Z_{f=0.01 Hz} 6.4 × 10⁹ Ω cm²) after 100-day immersion in aggressive solutions, demonstrating a 37,647.1 times improvement over EP coating. The intelligent heterostructure enables active protective properties for the GO-HHU-T-EP coating via environmental stimulus responsiveness. Projected density of states (PDOS) indicates that the adsorption mechanism originates from strong hybridization interactions between Fe and Ce/O atom orbitals. This work presents a promising design strategy for next-generation marine coatings that integrate anti-UV aging, mechanical enhancement, active protection, and long-term durability.

Key words: Stimuli-responsive intelligent coating, Heterostructure composite, Anti-UV aging, Active protection, Corrosion resistance