利用电化学阻抗技术研究了含有活性防锈颜料三聚磷酸铝的环氧涂层的耐蚀性。当涂层中加入20％的三聚磷酸铝时,涂层的耐蚀性能最好,并以此为代表探讨了含有活性防锈颜料的有机涂层的作用机理。
An investigation of the corroison prevention performance of epoxy coating containing aluminum polyphosphate was conducted using electrochemical impedance spectroscopy (EIS). When the weight percentage of aluminum polyphosphate in coating reached 20%, the epoxy coating exhibited the best performance, and the mechanism of the active anti-rust pigment was discussed. For the study of paint formulation EIS presented consistent conclusions with those from seawater immersion testing. The complicated time dependence of EIS plots indicated that the corrosion control step of metal under coating changed from diffusion controlled step to electrochemical reaction controlled step.
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