If the characteristic color of copper is very dark, the copper content in the surface tank liquid is high, and certain effective measures should be taken to adjust the content of sodium cyanide and copper to the conventional range. If the content contains copper, add as little as possible; If the copper in the tank solution comes from the anodic oxidation process of copper aluminum material, some effective measures should be taken to add non-copper additives or adjust the tank solution.        

        If the internal mechanism defects of aluminum cause the surface is not smooth: aluminum industry manufacturers casting mechanism, such as casting or aluminum die-casting aluminum product workpiece; Aluminum crystal optimization is not sufficient and loose, welding defects; In the process of production, defects such as inadequate shape variables and pine dendritic lines lead to uneven surface, which can be avoided by improving the internal quality of aluminum. Therefore, the processing technology of hengzhixing aluminum alloy profiles seems to be very important to improve the surface quality of anodic oxidation process. If the sodium cyanide content is normal and the copper content of the industrial aluminum profile table is high, there is a layer of characteristic color of copper on the surface of the aluminum material adhered to after water cleaning.