通过在阳极氧化液中添加纳米A12 O3,在镁合金表面制备了复合阳极氧化膜.采用扫描电镜、能谱仪、动电位极化测试以及往复摩擦磨损实验研究了纳米Al2 O3的添加量对阳极氧化过程、形貌及氧化膜性能的影响.结果表明,纳米颗粒的加入,增大了溶液电阻,从而使得成膜电压提高.纳米粉末的添加量与复合氧化膜的性能没有线性相关性.当电解液纳米颗粒的浓度为10g/L时,可以获得表面光滑平整、孔径细小均匀的复合氧化膜,此时复合氧化膜具有最优的耐蚀性和耐磨性能.
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