铝合金可变色阳极氧化膜制备方法及性能研究

Electrochemical Preparation Method and Properties of Variable Color Anodizing Film on Aluminum Alloy Surface

变色阳极氧化膜是在传统阳极的基础上,通过控制阳极氧化工艺参数,在工件表面形成特殊氧化膜结构。该氧化膜具有一定的孔隙率,孔径为50-200纳米级别,孔间距大,在100~500纳米之间,形成特殊的氧化膜结构,光线在氧化膜中发生反射和干射现象,从不同角度观看产品呈现由蓝紫色到黄绿色的变化,不需要进行染色就可以得到丰富的颜色。同时由于槽液是有机弱酸为主,氧化过程中对氧化膜的溶解度小,形成的氧化膜硬度高,可以进行氧化后抛光,使得产品表面达到高亮外观,具有类陶瓷效果,同时具备高的耐磨性能。

on the basis of traditional anodizing,variable color anodizing film is formed on the workpiece surface by adjusting the anodizing parameters.The oxidation film has a special micro-structure,with a certain porosity.The pore size is 50~200 nm and hole spacing is 100-500 nm.Then a kind of structural color is produced due to the reflection and interference of light.When observed from different angle,the surface of the workpiece can get variable color without any dyeing process,like blue-violet to yellow-green.At the same time,the oxidation film also has a higher hardness and higher scratch resistance.The organic weak acid electrolyte has a lower solubility to the film,so it can make the film dense.The surface of the oxidation film can achieve a bright ceramic effect after polishing.