通过电化学阻抗谱及相应的等效电路研究了AZ91D镁合金微弧氧化(MAO)膜在乙二醇水溶液中的腐蚀行为,采用扫描电镜对表面腐蚀形貌进行了观察.结果表明:乙二醇吸附至MAO膜表面后,逐步形成了一层致密的防护膜,随乙二醇浓度增大,电荷转移电阻增大,MAO膜的耐腐蚀性能提高；腐蚀性离子(C1与SO42-)在乙二醇水溶液中共存时,腐蚀作用加强；添加了0.2 mol·L-1 NaF后,由于生成了难溶于水的含氟晶体,填充了MAO膜的多孔层空隙,对镁合金微弧氧化膜起到了有效的缓蚀作用.
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