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本文根据我们几年来的工作经验,就铝及其合金在电化学抛光、氧化、扩孔、着色过程中常见的实际问题,提出一些切实可行的解决办法,供同行们参考。一、工艺简介1.预处理先用3号金相砂纸将铝片表面磨平,放入10%的NaOH溶液中脱脂,五分钟后取出用水冲洗,洗净后放入2.5%的HNO_3中以备电化学抛光之用。2.电化学抛光抛光液成份是:磷酸50%,硫酸8%,乙二醇32%,水10%,温度90℃左右,
Based on our work experience over the past few years, this paper puts forward some practical solutions to the common problems in the electrochemical polishing, oxidation, reaming and coloring of aluminum and its alloys for the reference of peers. First, the process profile 1. Pretreatment First with the No. 3 metallographic sandpaper polished aluminum surface, into the 10% NaOH solution degreasing, five minutes after the removal of water rinse, washed into 2.5% HNO_3 Preparation of electrochemical polishing. 2. Electrochemical polishing slurry composition is: 50% phosphoric acid, sulfuric acid 8%, 32% ethylene glycol, water 10%, the temperature is about 90 ℃,