To reduce the harm of solvent based coating to the environment, a new type of composite powder coating with environmental protection and good corrosion resistance was reported. The epoxy resin modified PVC powder coating was used as a primer and pure PVC powder coating as a topcoat, which could be applied to the corrosion protection of steel in marine environment by electrostatic spraying. The structure of the coating was confirmed by SEM, FT-IR, Raman and TEM, and the effects of co-curing and layer-by-layer curing on the coating were compared. The mechanical property test, salt spray test, SEM and AFM results revealed that the material obtained the highest adhesion and salt spray resistance when the epoxy content in the primer was 50 wt%. In contrast to the pure epoxy coating and the pure PVC coating, the EP-PVC coating exhibited an excellent corrosion resistance, owning to the good adhesion of composite primer and the good barrier and corrosion resistance of the topcoat.

为减少溶剂型涂料对环境的危害，报道了一种新型的环保、耐腐蚀的复合粉末涂料。以环氧树脂改性PVC粉末涂料为底漆，以纯PVC粉末涂料为面漆，可通过静电喷涂应用于海洋环境中钢材的防腐。通过SEM、FT-IR、Raman和TEM对涂层结构进行了确认，并比较了共固化和逐层固化对涂层的影响。力学性能测试、盐雾测试、SEM和AFM结果表明，当底漆中环氧含量为50wt%时，该材料获得了最高的附着力和耐盐雾性能。与纯环氧涂层和纯PVC涂层相比，