Aluminum products for the bright and smooth surface of the aluminum products, the molded aluminum products generally have been mechanical polishing. However, after mechanical polishing shaft 4 oxidation processing, only the oxide film to obtain a smooth, gloss is often not enough. Requirements for high gloss decorative oxide film product, even after mechanical polishing chemical polishing or electrolytic polishing. High-purity aluminum or aluminum-magnesium alloy after chemical polishing or electrolytic polishing can be eligible for a high-gloss surface reflection coefficient, especially electrolytic polishing, it can get very satisfactory results. Unfortunately, the general three acid chemical polishing solution because it contains nitric (HNO3), heating operation, the decomposition of nitrogen dioxide (NO2) gas produced "Dragon" nuisance. And the quality excellent and stable electrolytic polishing liquid contains chromic anhydride, resulting chromium-containing waste water, pollution of the environment, cause waste disposal problems. As for aluminum electrolytic polished chrome-free anhydride, many articles have cited a number of recipes in Dongguan aluminum products processing plants, mostly in phosphoric acid, sulfuric acid-based polishing solution add some organic acids (such as citric acid, tartaric acid, oxalic acid) or an alcohol (e.g. ethanol, butanol, glycerol), etc., on the aluminum surface from corrosion polishing action to FIG chromic anhydride substituted by these additives. But after the test process, such formulations there is a high cost, poor stability of electrolyte, it is difficult to promote the use in large-scale industrial production. It is reported that Shanghai has many units have been committed without chromic anhydride Electropolishing test some plants recently passed the appraisal. We look forward to peer around in this area can have a breakthrough test results. 5-axis processing | machining | Hongrun Hongrun by Dongguan Shijie Hardware Products Factory. Hongrun Dongguan Shijie Hardware Products Factory (dghrwj1688.1688.com) strong, credible, in Dongguan, Guangdong hardware accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hong Run and you work into the brilliant, for a better future!