A357铝合金轮毂无铬终钝化膜的制备与耐蚀性  

Preparation and corrosion resistance of chromium-free passivation film as a final finish on A357 aluminum alloy wheel hub

作　　者：王双红[1,2] WANG Shuang-hong(School of Mechanical Engineering,Shenyang University,Shenyang 110044,China)

机构地区：[1]沈阳大学机械工程学院 [2]沈阳防锈包装材料有限责任公司

出　　处：《电镀与涂饰》2019年第23期1291-1294,共4页Electroplating & Finishing

摘　　要：采用由双氨基硅烷、环氧基硅烷、纳米SiO2和氟锆酸组成的无铬钝化液,在温度20℃下对A357铝合金钝化3 min,得到无色、透明的钝化膜,不会影响铝合金原有的光泽和表面品质。该膜层是由夹杂了纳米SiO2的无机复合物和有机硅烷膜组成的三维复合膜,无需涂装也能满足耐96 h中性盐雾腐蚀试验的要求。A357 aluminum alloy was passivated in a bath comprising diamino silane,epoxy silane,nano-SiO2,and fluorozirconic acid at temperature 20℃for 3 min.A colorless and transparent passivation film were obtained,which had no impact on luster and surface quality of the aluminum alloy substrate.The passivation film is a kind of three-dimensional composite consisting of inorganic compounds and organic silane film with SiO2 nanoparticles distributed in it,and meets the requirement of resistance to neutral salt spray corrosion for 96 hours.

关 键 词：铝合金 无铬钝化膜 硅烷 二氧化硅 氟锆酸 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]