采用电化学交流阻抗谱(EIS)技术对环氧富锌底漆/环氧云铁中间漆/氯化橡胶面漆重防腐涂层在海水中使用初期的失效过程进行了研究,同时采用电容法分析了失效过程中水分的吸收问题及水分的扩散系数.结果表明:涂层体系在海水中的失效过程分为两个阶段,浸泡前120h,涂层电阻从起始的2.284×109Ω· crn2以大约1.9×107Ω· h-1的速率迅速下降到1.029×107Ω·cm2,120h后则以较小的速率(8381Ω·h-1)下降.而涂层的吸水过程(lnCc-t1/2)可以分为两个阶段,线性增加阶段(0～30h)和30h后缓慢增加阶段,并根据第一阶段计算得到涂层中水分的扩散系数D为2.9076×10-9cm2·s-1.
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