提出利用循环阳极极化曲线研究转化膜耐腐蚀性能 的方法.介绍了LY12 Al合金表面稀土转化膜的工艺.将稀土转化膜与其它转化膜的耐腐蚀性 能进行比较.利用循环阳极极化曲线的“相对环面积”研究转化膜耐腐蚀性能可得出转化膜 耐腐蚀规律性.
A new method for studying corrosion resistance of c onversion films was developed with cyclic anodic polarization curves in this pap er. Technological process of rare earth metal (REM) conversion films on LY12 all oy was introduced. The corrosion resistance of REM conversion films was examined by salt solution immersion test and cyclic anodic polarization curves. The resu lts obtained from cyclic anodic polarization curves could be consistent with the result of salt solution immersion test when the appositive area of cyclic anodi c polarization curves was used to evaluate the corrosion resistance of the conver sion films.
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