XavierThe full name of the treatment is hard anodized. The general requirements for the thickness of the hard anodized film are 25-150, the thickness of most hard anodized films is 50-80, and the film thickness is less than 25. The hard anodized film is used for teeth and spiral parts in other occasions, wear-resistant, The thickness of the insulating anodic oxide film is about 50. Under some special process conditions, the thickness required for production exceeds 125 hard anodic oxide film, but it must be noted that the thickness of the anodic oxide film is thick, and the microhardness of the outer layer can reduce the surface hardness of the film. Roughness increases.
The full name of hard anodizing is hard anodizing. The main purpose of hard anodizing of aluminum alloys is to improve various properties of aluminum and aluminum alloys, including corrosion resistance, wear resistance, weather resistance, insulation and adsorption. It is suitable for both deformed aluminum alloys and possibly die-cast aluminum alloy components.
The bath solution for hard anodizing is generally sulfuric acid solution and sulfuric acid added with organic acids, such as oxalic acid, sulfamic acid, etc. In addition, hard anodizing can be achieved by lowering the anodizing temperature or lowering the sulfuric acid concentration. For wrought aluminum alloys with copper content greater than 5% or silicon content greater than 8%, or die-cast aluminum alloys with high silicon, some special measures for anodizing may also be considered. For example: for 2XXX series aluminum alloy, in order to avoid the aluminum alloy being burned during the anodizing process, 385g/L sulfuric acid plus 15g/L oxalic acid can be used as the electrolytic bath solution, and the current density should also be increased to more than 2.5A/dm .
There are many hard anodizing electrolysis methods, such as sulfuric acid, oxalic acid, propylene glycol, sulfosalicylic acid and other inorganic salts and organic acids. The power supply used can be divided into DC, AC, AC-DC superposition, pulse and superim posed pulse power supply.