铝在硫酸溶液中的复合阳极氧化研究Ⅱ. 难溶粉体的细度对阳极氧化的影响

摘要

With routine anodizing, cell voltage-time curve measurement and electron microscope analysis, the effects of Al2O3, SiC insoluble powders on anodizing are researched, when Al is compositly anodized in H2SO4 solution. The tests results show that the anodizing process isn't influenced by the grain size of insoluble powders, but cell voltage of anodizing and film properties are influenced. The smaller the powder grain size, the higher the cell voltage, and the better of film properties(the hardness, thickness and anticorrosion property are all good), on the contrary, this is also right. When the insoluble powders go into film, the quantitis of entering is related to the grain size and adding quantity of insoluble powders. If the grain diameter of powders is smaller and more amount of powders are added, more powders enter the film.%采用常规阳极氧化、槽压-时间曲线和电镜分析等方法，研究了铝在硫酸溶液中复合阳极氧化时Al2O3、SiC粉体细度对阳极氧化的影响。实验表明：难溶粉体细度不影响阳极氧化过程，而影响阳极氧化时的槽电压和膜层性能。粉体细，则槽电压高，膜层性能优良(硬度高、厚度大、耐蚀性好)；反之亦然。难溶粉体进入了膜层，进入量与粉体细度、粉体加入量有关。粉体粒径小、加入量大，则粉体进入膜层量也就多。