铝和铝合金的化学抛光是以70%(质量百分数)的磷酸为根底的溶液。常用的是磷酸、硝酸、硫酸混合液，当合金成分变化时，硫酸含量在9%。l5%之间变化，硝酸含量在3%～9%之间变化。由于工作温度在105℃左右，大量产生氮氧化物污染环境。因而，在磷酸和硫酸混合液根底上用S类酸铜光亮剂作添加剂，产生了无黄烟化学抛光工艺。但这种无黄烟化学抛光只适用于纯铝或铝镁合金，对其他铝合金效果较差。后来又有只加2%硝酸的配方呈现，也用相似的添加剂，没得到扩展适用范围。但是，至今磷酸、硝酸、硫酸混合液由于顺应性强，还是主流配方。

　　Chemical polishing of aluminum and its alloys is based on 70% phosphoric acid. The mixture of phosphoric acid, nitric acid and sulfuric acid is commonly used. When the alloy composition changes, the sulfuric acid content is 9%. The content of nitric acid varied from 3% to 9%. Because the working temperature is about 105 ℃, a lot of nitrogen oxides are produced to pollute the environment. As a result, a yellow smoke free chemical polishing process was developed by using S-type Acid Copper brightener as additive on the base of the mixture of phosphoric acid and sulfuric acid. However, this kind of chemical polishing without yellow smoke is only suitable for pure aluminum or aluminum magnesium alloy, and has poor effect on other aluminum alloys. Later, only 2% nitric acid was added to the formulation, and similar additives were used, which did not extend the scope of application. However, the mixture of phosphoric acid, nitric acid and sulfuric acid is still the mainstream formula due to its strong compliance.
　　含铜、锌较高的铝合金，化学抛光时加2～5g/L铬酐有协助。手册上有记叙，含硅高的铝合金，化学抛光时用60～65mL/L硝酸、15～20mL/L氢氟酸、甘油1～2mL/L的混合液，在室温下浸2s。不过这种办法更像是浸蚀。
　　For aluminum alloy with high copper and zinc content, it is helpful to add 2-5g / L chromic anhydride during chemical polishing. There is a description in the manual. For aluminum alloy with high silicon content, 60-65ml / L nitric acid, 15-20ml / L hydrofluoric acid and 1-2ml / L glycerin are used for chemical polishing, and the mixture is immersed for 2S at room temperature. But this is more like erosion.
　　还有一种含醋酸的配方，适用于纯铝和2A12(LYl2)：醋酸关于避免点状腐蚀有更好的效果。
　　There is also a formula containing acetic acid, which is applicable to pure aluminum and 2A12 (lyl2): acetic acid has better effect on avoiding pitting corrosion.
　　以上是铝卷生产厂家为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：http://www.jndclyyxgs.com
　　The above is the relevant content introduced by the aluminum coil manufacturer for you. To learn more, please visit the website: http://www.jndclyxgs.com