Smart anticorrosive coatings were prepared by adding microcapsules and silica nanoparticles (SNs) in waterborne epoxy matrix and applied on galvanized steel substrates. The microcapsules encapsulated crystal violet lactone (CVL), epoxy monomer and phenyl acetate in methyl methacrylate polymer shell, so that the self-healing and self-reporting functions can be simultaneously realized. SNs can trigger the chromogenic reaction of CVL, while improving the corrosion protection properties of the composite coatings. The comprehensive properties of the coatings were investigated as a function of the weight ratio of CVL/epoxy monomer in microcapsules, the filling content of SNs and microcapsules, as well as the change of pH value. The corrosion current density of the composite coatings decreased with the SNs content and increased with the microcapsule content. Smart coatings with corrosion current density of 2.91 × 10⁻¹² A cm⁻² were achieved by adding 15 wt% microcapsules and 15 wt% SNs in epoxy matrix.

通过在水性环氧树脂基体中添加微胶囊和二氧化硅纳米粒子 (SNs) 制备智能防腐涂层，并将其涂在镀锌钢基材上。该微胶囊将结晶紫内酯（CVL）、环氧单体和乙酸苯酯包裹在甲基丙烯酸甲酯聚合物外壳中，从而可以同时实现自修复和自报告功能。SNs可以引发CVL的显色反应，同时提高复合涂层的防腐性能。研究了涂层的综合性能与微胶囊中CVL/环氧单体的重量比、SNs和微胶囊的填充量以及pH值变化的函​​数关系。复合涂层的腐蚀电流密度随着SNs含量的增加而降低，随着微胶囊含量的增加而增加。腐蚀电流密度为 2.91 × 10 的智能涂层^-12 A cm ^-2是通过在环氧树脂基质中添加 15 wt% 的微胶囊和 15 wt% 的 SN 来实现的。