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Anodizing VS Chemical Oxidation

Release time:

2022-04-08 15:40

The oxidation treatment of aluminum and its alloys is dividedChemical oxidation and electrochemical oxidation (commonly known as anodic oxidation)two broad categories.

chemical oxidationThe film obtained by the treatment is relatively thin, the general thickness is 0.5 μm-4 μm, soft and not wear-resistant, corrosion resistance is lower than the anodic oxide film, generally should not be used alone.anodic oxidation oxide filmThe thickness is about 5-20 microns (the thickness of hard anodic oxide film can reach 60-200 microns), with high hardness, good heat resistance and insulation, corrosion resistance is higher than that of chemical oxide film, porous, and has good adsorption capacity.

Comprehensive performance of aluminum anodic oxide filmBetterChemical oxide film, the application is more extensive, the main uses are:

(1) Protection. Improve the wear resistance, corrosion resistance and weather corrosion resistance of the parts.

(2) Decorative. Made of natural color bright film, as a color film.

(3) Insulation. As the capacitor dielectric film, an aluminum wire coil insulating film withstands a voltage of 25V per micron thickness.

(4) improve the binding force with the organic coating, as the coating bottom layer.

(5) improve the bonding force with the inorganic coating layer, as the bottom layer of electroplating and enamel.

(6) Other functional applications in development, depositing magnetic alloys in porous films as memory elements, solar absorption panels, ultra-high hard films, dry lubrication films, catalyst films, etc.

Therefore, the oxidation treatment of aluminum and its alloys inConstruction industry, aviation and aerospace industry, electrical and electronic industry, food industry, chemical and pharmaceutical industry, transportation industryand other fields have been widely used. At the same time, with the development of these industries, their requirements for anodic oxidation are getting higher and higher.