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中文摘要：
在硅酸盐电解液中添加复合添加剂硝酸镧和纳米氧化锌对铸造铝合金进行微弧氧化实验。通过涡流测厚仪、扫描电镜、显微硬度计、X射线衍射仪等分析复合添加对膜层的厚度、硬度、腐蚀性能的影响。结果表明,复合添加剂La（NO3）3＋纳米ZnO的加入可提高膜层的耐蚀性,增加膜层的厚度和硬度。当La（NO3）3含量0.5g/L,纳米ZnO含量3g/L时,获得的膜层厚度和硬度较大。
英文摘要：
Ceramic coatings were fabricated on ZL205A aluminum alloy during micro-arc oxidation by mixing La （NO3）3 and nano-ZnO into the metasilicate electrolyte. The effects of compound additive of La（NO3）3 and nano-ZnO in electrolyte on thickness, hardness, corrosion resistance and microstructure of the ceramic coatings were analyzed. The results show that nano-ZnO was deposited on the surface layer of the ceramic coatings in micro-arc oxidation reaction process. The corrosion resistance of the coatings was thus improved. Both the thickness and hardness of the ceramic coatings increased a lot. The optimal addition amount of La（NO3）3 and nano-ZnO in the electrolyte was 0.5 and 3g/L.
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