确定了Al合金常温稀土(铈)化学转化膜工艺.并用电化学法、扫描电镜研究了其成膜过程、耐蚀性，分析了化学成分和形貌.结果表明，工艺简单，成膜速度快，耐蚀性好.添加剂有效促进了铈的转化处理.
The process of formation of cerium conversion coatings at ambienttemperature on LY12 aluminum alloy was developed. The coating formation process and its corrosion behavior in 3.5% NaCl solution were studied by electrochemical methods and scanning electronic microscopy (SEM). The composition of the coatings and its morphology were also examined by SEM. Experimental results showed that the treatment process was simple, the speed of coating formation was quick. The anodic and cathodic reactions were both inhibited. And the corrosion resistance was sufficient. The additive accelerant could efficiently accelerate the formation of cerium conversion coatings.
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