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用正交试验优选出一种适宜的酸性铬酸盐处理工艺，并研究了各种工艺因素对转化膜膜厚及耐蚀性的影响，综合考察和比较了几种典型配方的性能指标，试验结果表明这种工艺提高了铝硅合金的耐点蚀性能。
An optimum acid chromate treatment process was optimized by orthogonal test, and the influence of various process factors on the film thickness and corrosion resistance of the conversion coating was studied. The performance indexes of several typical formulations were compared and tested The results show that this process improves the pitting corrosion resistance of aluminum-silicon alloys.