Abstract: ［Objective］To optimize the formulation of UV-curable anti-corrosion coatings，the enhancement effect of polydopamine and acrylate-modified mica on the mechanical properties andcorrosion resistance of coatings is clarifed and the anti-corrosion mechanism of modified mica-reinforced UV-curable coatings is explored.［Methods］Mica was modified using polydopamine andacrylic double bonds to prepare modified mica with UV-curable activity. An epoxy acrylate-based UV-curable coating system was constructed，and the resin ratio and filler loading were optimized. Thecoating performance was comprehensively evaluated via tests of curing behavior，mechanical properties， hardness，adhesion，electrochemical impedance spectroscopy，and neutral salt spray test.［Results］ Under the optimal formulation，the double-bond conversion of the coating exceeded 90%，the tensile strength was 3. 93 MPa，the pencil hardness was 4H，the adhesion was grade 5，and the pendulum hardness was 360 s. The initial electrochemical impedance was 10^9.4 Ω·cm²，which remained basically stable within 15 days. After 360 h neutral salt spray test，only slight corrosion occurred at the edges of the test panels.［Conclusion］Modified mica can effectively improve the curing efficiency，mechanical properties and corrosion resistance of UV-curable coatings. It exerts an anti-corrosion effect by forminga dense physical shielding layer to block the penetration of corrosive media. The optimized coatingformulation exhibits excellent comprehensive performance，providing an experimental basis for thepreparation of high-performance UV-curable anti-corrosion coatings.

Key words: UV-curable, dopamine, mica, anticorrosive coatings

摘要： 【目的】优化紫外光（ UV）固化防腐涂层配方，明确聚多巴胺与丙烯酸酯改性云母对涂层力学性能及耐腐蚀性的增强作用，探究改性云母增强 UV固化涂层的防腐机理。【方法】采用聚多巴胺与丙烯酸对云母进行改性，制备具有 UV固化活性的改性云母；构建环氧丙烯酸酯基 UV固化涂层体系，优化树脂配比与填料添加量；通过固化性能、力学性能、硬度、附着力、电化学阻抗及耐中性盐雾性测试，综合评价涂层性能。【结果】在最优配方下，涂层双键转化率超过 90%，拉伸强度 3. 93 MPa，铅笔硬度 4H，附着力 5级，摆杆硬度 360 s；电化学阻抗初始值为 10^{9. 4} Ω·cm²，15 d内基本保持稳定， 360 h中性盐雾试验后，仅边缘出现了少量腐蚀。【结论】改性云母可有效提升 UV固化涂层的固化效率、力学性能及耐腐蚀性，其通过构建致密物理屏蔽层阻碍腐蚀介质渗透实现防腐作用；优化得到的涂层综合性能优异，为高性能 UV固化防腐涂层的制备提供实验依据。

关键词: 紫外光固化, 多巴胺, 云母, 防腐涂层

CLC Number: 

• TQ635