Influences of parameters for oxidizing process, pre and post treatment procedures and material status of brass substrate on quality of chemical conversion film on brass were described.
介绍了氧化工艺参数，前、后处理工序，黄铜基体材质状况等因素对黄铜化学转化膜质量的影响。
2
The black molybdate conversion film obtained with the above technics has smooth and glossy surface and good adhesion to the substrate.
按此工艺制得的黑色钼酸盐转化膜表面光滑，光泽性好，与基体结合牢固。
3
Experimental results also demonstrated that benzoic acid was not an ideal substrate of lipase, which led to low conversion rates, but its limitation could be overcome by excess L-ascorbic acid.