The distinction between the chemical oxidation and electrochemical oxidation
chemical oxidation and electrochemical oxidation of distinguish between the oxidation of aluminum and aluminum alloy profile processing can be divided into chemical oxidation and electrochemical oxidation ( Commonly known as anodic oxidation) Two kinds big. For decorative purpose often require color processing, the method of coloring chemical coloring and electrolytic coloring. 5 microns ~ 4 microns, soft wear-resisting, corrosion resistance is lower than the anodic oxidation film, should not be commonly used alone. Due to the chemical oxidation film has good adsorption ability, the main role in the bottom layer of paint. The oxidation of anodic oxidation film thickness of about 5 ~ 20 microns ( Hard anodic oxidation film thickness up to 60 ~ 200 microns) , have high hardness, good heat resistance and insulation, corrosion resistant ability higher than that of chemical oxidation film, porous, has good adsorption capacity. Chemical oxidation treatment required equipment is simple, convenient operation, high efficiency and low cost, wide applicable scope, without being limited by the size and shape of the parts, can be oxidized large parts and assemblies ( Such as spot welding, riveting pieces, long and thin tubes, etc. ) 。 After the chemical oxidation coating, can effectively improve the corrosion resistance of parts. Aluminum anodic oxidation film comprehensive performance is better than that of chemical oxidation film, the more widely used, the main use: ( 1) Protective. Improve parts of wear-resisting, corrosion resistant, corrosion resistant to climate. （ 2) Decorative. Made from grey light film, color film. （ 3) Insulation. As a capacitor dielectric film, aluminum spool of insulation film, each micron thickness can be resistant to 25 v voltage. （ 4) How to improve coating and the adhesion strength of the organic coating, ground floor. （ 5) Increase with the inorganic coating binding force, electroplating, the bottom layer of enamel. （ 6) Other functions in the development use, sedimentary magnetic aluminium alloy profiles for memory in porous membrane components, solar panels, ultra hard film, dry lubricating film, catalytic membrane and so on. So the oxidation of aluminum and aluminum alloy profile processing in the construction industry, aerospace industry, electrical and electronic industry, food industry, chemical industry and pharmaceutical industry, transportation and other fields is widely used. With the development of the industry at the same time, they also more and more high to the requirement of anodic oxidation.