Anodic oxidation pretreatment of aluminum alloy is the key to determine the appearance of product processing, especially at present, the application of dyeing profiles has a wide market, and light-colored series of electrophoresis, coloring profiles, must be done by a better pretreatment process to complete, such as the removal of extruded lines, slight scratches, and a certain gloss (the surface is very bright) sand surface treatment effect quality requirements. Alkaline gloss sand surface process overcomes the poor surface quality of alkaline etching process, acid etching process surface gray, chemical polishing has extrusion lines and difficult to remove the scratches etc. shortcoming. Alkaline gloss sand surface process synthesizes all the advantages that sand fast and exquisite surface of acid etching process, high gloss of the chemical polishing , low cost of the alkaline etching, so it becomes a new process of the aluminum alloy anodic oxidation pretreatment.

Alkaline gloss sand surface process, integrating the advantages of acid etching process and chemical polishing process, effectively overcome the defects of the acid etching process gray and no light, chemical polishing has extrusion lines and difficult to remove , high production costs. However, the heating problem should be fully considered when the alkaline gloss sand surface process tanks design. Because the alkaline gloss sand surface process in the production of the trough liquid temperature rise extremely fast, it is easy to exceed the temperature allowed by the process. Therefore, cooling device has to be considered in the design. The cooling device is easy, the use of heating pipes to control the cooling of the tap water can not only (the alkaline sand surface process temperature of 50, with the control of water cooling can meet) in the tank design, the volume is slightly larger, about 1 cubic meters of tank corresponding to 2 square meters of aluminum alloy product surface area, which will effectively alleviate the temperature problem. The process and the tank analysis and maintenance are simple, mess production is less difficult.