Aluminum time. The time required for closing the film thickness, but is usually belly m per l about 2 ~ 3min, the general anodic oxide film of the total closure time is about 20 ~ 30min. Preferably the lower limit of a good water quality conditions. pH. The higher the pH value of closed faster, but the high pH value will cause the film powder, the surface appears Creme. pH value is generally controlled between 5.5 to 6.5, most preferably 5.8. Acetic acid or ammonia can be used to adjust the pH. Boiling water blocking solution may be added as a closing aid the additives, such as nickel, cobalt and other metal salts and potassium dichromate, sodium silicate, and triethanolamine, etc., adding additives closed closure can not only improve the quality, but also inhibit Creme role. In closing aid should be particularly careful to use drone metal parts CNC machining, if the inappropriate choice of closure aid, copper CNC lathe, or adding an excess will have a very adverse effect on the quality of the closure. Aluminum oxide in the electrolyte is added directly to these additives, CNC machining precision metal model aircraft, typically some organic acids such as thiosalicylic acid, cresol sulfonic acid, oxidation of the oxide film is tinted. Strictly speaking Acid Test oxide yellow oxide film should belong to this one. There is also the oxidised aluminum workpieces into containing nickel, selenium, cobalt, tin and other metal oxide electrolyte membrane electrolysis coloring, processing, according to the different material composition and aluminum electrolysis process can be a variety of different colors. Although electrolytic coloring method to get more monotonous tone also far less colorful organic dyes, electrolytic coloring oxide film but hair color, durability, weather resistance is very high. Currently electrolytic coloring of aluminum products have been widely used in building materials such as aluminum door frames. CNC lathe, Hong Run (online consultation), processed by Hongrun Dongguan Shijie Hardware Products Factory. Hongrun Dongguan Shijie Hardware Products Factory (dghrwj1688.1688.com) is Dongguan, hardware accessories leader over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Hongrun leadership with the staff warmly welcome all inquiries negotiations to create a better future for Hong Run.