镁合金“绿色”化学转化处理

“Green” Chemical Conversion Treatment of Magnesium Alloy

介绍了一种新型、无毒、低能耗的镁合金化学转化处理方法。通过正交试验法对各工艺参数进行优化选择,获得了最佳化学转化工艺参数为GMAGc20g/L,温度30℃,时间30min;并通过中性盐雾试验将传统的锰系转化和铬酸盐转化处理方法与本工艺进行了耐腐蚀性比较。结果表明,本转化工艺所得膜层的耐中性盐雾腐蚀性能优于上述2种传统工艺。

A novel non-toxic chemical conversion treatment with low energy consumption was used for the surface modification of magnesium alloys. The technical parameters were optimized using orthogonal test, and the optimal chemical conversion process for the Mg alloys was then established. Besides, the corrosion resistance of the Mg alloys subject to the titled chemical conversion treatment was evaluated using neutral salt-fog test and compared to that of the same Mg alloys subject to Mn-series and chromate conventional conversion treatment. As the results, it was suggested to conduct the optimized chemical conversion treatment of the Mg alloys in GMAGc solution of a concentration of 20 g/L, at a temperature of 30 ℃, and for a duration of 30 min. The resulting conversion coating had better corrosion resistance than the conventional Mn-series and chromate conversion coatings.