为了扩大导电聚合物聚苯胺的应用范围,采用循环伏安法在镍电极表面电化学合成聚苯胺(PANI),制备了聚苯胺修饰镍(PANI-镍)电极.用极化曲线、开路电位-时间曲线及交流阻抗谱分析了PANI-镍电极的防腐蚀性能.结果表明:与镍电极相比,PANI-镍电极的自腐蚀电位正移了150 mV,自腐蚀电流降低为原来的1/19；PANI-镍电极在3％NaCI溶液浸泡4 000 min后PANI膜逐渐失去作用,16 000 min后开始大面积剥离；PANI膜对镍电极的保护机理是屏蔽作用.
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