【摘要】 在含有硅超微粒子的电解液中,采用电化学方法对铝或铝合金进行一次电解,在其表面获得掺硅复合氧化膜,并在含有混合金属盐和硅配合体系中进行二次电解着色,获得具有高防护性的彩色复合铝氧化膜.测试结果表明:一次电解形成的掺硅复合氧化膜中硅的存在形式主要是NaA lS i3O8长石型结构,二次电解着色后,膜层中硅的存在形式主要是Ag8S iS6;膜的表观密度为3.53 g.cm-3、孔隙率10.6%、膜厚大于20μm;336 h耐盐雾实验腐蚀评级为10级,10周期(240 h)的耐交变湿热实验试片膜层无变化,28 d(672 h)耐霉菌实验长霉为0级,连续1 Y(365天)自然气候暴露实验腐蚀评级为10级.更多还原

【Abstract】 In an electrolyte containing micro crystalline silicates,an inlay Si composite oxide film was formed by single electrolysis of aluminum matrix surface and a protective and colored film was made by electrolysis-coloring of this oxide film in another electrolyte containing metal salt/Si-complex.The study on microstructure of the film shown that the Si state in the inlay Si composite oxide film made by this method is mainly of NaAlSi₃O₈structure and the Si state in the final colored film is mainly of Ag₈SiS₆ structure;the density,cavity ratio and thickness of the inlay Si composite oxide film are 3.53 g·cm^-3,10.6% and 20 μm.The study on protection properties shown that the final colored film has permanent protective property: the grade of 336 h salt spray test is 10;there is no change of the film during the 10 T（240 h） alternate wet and heat test;the mold grade of the 28 days（672 h） mildew test is 0.;the eroded grade of continuous 1Y（365 days） nature-exposure experiment is 10.So the film which we mentioned above is suitable for application in severe atmosphere.更多还原