氧化锌改性聚氨酯涂层的抗介质扩散行为研究

Research on the Anti-Diffusion Behavior of ZnO/Polyurethane Coatings

研究了添加不同颜基比(P/B)ZnO的聚氨酯涂料在3·5%氯化钠溶液中的电化学阻抗谱特征,结果表明,添加量为P/B=1的涂层,颜料分布均匀适中,具有最佳抗介质渗透性能,耐盐雾性能较好,且该涂层特征频率较低,表明其具有最小的涂层缺陷面积。

The anti-diffusion of ZnO/polyurethane coatings were studied by using the impedance spectroscopy technique. Results indicate that the coating with P/B=1 has the best anti-diffusion and salt spray performance, the breakpoint frequency of the coating with P/B=1 is lower than others, which indicates the smaller defect area.