采用循环伏安法(Cv)在含草酸、苯胺单体的溶液中以AZ91镁合金为基底沉积聚苯胺(Pani)涂层,并通过IR和SEM等手段对涂层的结构和形貌特征进行表征;同时通过极化曲线、开路电位-时间曲线及电化学阻抗谱(EIS)等评价涂层在3.5％NaCl溶液中的耐蚀性.结果表明,聚苯胺涂层有效提高了镁合金基体的自腐蚀电位,并导致镁合金腐蚀电流密度下降近两个数量级;长期浸泡过程中发现涂层能够有效抑制腐蚀溶液的渗透,阻止基体合金的腐蚀.
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