采用循环伏安法在304不锈钢(304SS)基体上电化学合成聚吡咯(PPy)膜层,并通过Tafel极化曲线、电化学交流阻抗谱法(EIS)研究聚吡咯膜层的腐蚀防护性能.结果表明,聚吡咯膜层使304不锈钢基体的自腐蚀电位正移60 mV,腐蚀电流密度由10-6A/cm2变化到10-7A/cm2;覆有聚吡咯膜层的304不锈钢在腐蚀液中浸泡的过程中,由于聚吡咯的氧化还原能力,在金属表面加速钝化层的形成及修复破坏的钝化层,进一步提高了金属的抗腐蚀性能;聚吡咯膜层的防腐机制归结为物理屏蔽作用和钝化机制.
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