为了提高Q235碳钢的防腐蚀性能,先对其进行钝化处理,然后分别在不含和含有钼酸的苯胺和草酸混合溶液中,采用循环伏安法在碳钢电极表面电化学合成聚苯胺(PANI)和聚苯胺/钼酸(PANI-MoO4-)涂层;利用开路电位-时间曲线、动电位极化曲线及电化学阻抗谱分析了PANI涂层和PANI-MoO2-涂层在3.5％NaCl溶液中的防腐蚀性能.结果表明:PANI-MoO2-涂层对Q235碳钢的腐蚀防护作用明显优于PANI涂层;与碳钢相比,PANI-MoO2-涂层的自腐蚀电位升高了近188 mV,自腐蚀电流密度约为碳钢的1/5,低频阻抗模值|Z|o.05 Hz约为碳钢的53倍.
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