铝合金微弧氧化工艺产业化研究

Study on the MAO Technology for Industrialization on the Aluminium Alloy

研究了影响铝合金微弧氧化产业化的各种因素，结果表明：硅酸钠有利于成膜，但含量不宜太高；添加剂A含量增加会减少膜厚，但可以使膜层表面孔径变细，光滑度增加，膜层耐磨性变好；高电流密度有利于膜的生成，但发热严重；防烧剂B能彻底解决了铝合金微弧氧化膜层在高温下的烧蚀问题；脉冲电流对防止膜层烧蚀有一定作用，但是会降低成膜速率。铝合金本身材质对成膜有较大影响，可溶性杂质含量偏高会推迟起弧时间，导致膜层舒松，耐磨性下降。优化后的工艺环保，能耗低，电解液使用寿命长，现已进行实际生产，得到的膜层耐磨性和耐蚀性均满足厂家要求。

the factors which influence MAO technology for industrialization were studied, the results show that： the Na2 SiO3 is propitious to film growth, but the content of Na2 SiO3 should be suitable; with the increasing of additive A, the thickness of film reduced , the surface aperture become thin, the degreese of lubricity enhanced and the wear-resiting property become better. High current density is use for film growth,but generate heat dadly;The additive B can solve the problem completely which the film will be ablated at high temperature; The pulse current can prevent film ablate a little while reduce the speed of film growth; The character of aluminum alloy influence film growth hardly, if the aluminum alloy have many solubility impurties, the time of appearing arc will be put off, and the MAO film will be loose that make the wear-resiting property bad. The optimized technology is environmental protection and low energy costing , the life of electrolyte is become longer also. This technology is used to manufacture product greatly in the factory now. the wear-resiting property and corrosion resisting property of product is good and meet the factory request.