CERIUM CONVERSION COATINGS FOR LY12 ALUMIMIUM ALLOY
LY12 Al合金铈转化膜的研究

The process of formation of cerium conversion coatings at ambient temperature 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.