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brief introduction of anodizing
- 2018-03-19 15:26 -
Anodizing is an electrochemical oxidation of metals or alloys, it takes metal or alloy part as the anode, and a layer of oxide film formed on the surface by electrolysis treatment. Metal oxide film change the conditions and properties of surface, it improves surface coloration, corrosion resistance, wear resistance and hardness for metals and alloys, protect metal surfaces, etc.
aluminum sheet price
Take the anodizing of aluminum as an example, place the aluminum or aluminum alloys placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as an anode, then electrolysis it under a specific conditions with current, the aluminum or aluminum alloy surface will formed a layer oxide film, with a thickness of 5 micron to 20 micron. The hardness and wear resistance of  aluminum or aluminum alloy that processed by anodizing has improved, with good heat resistance, insulativity, corrosion resistance, etc.
This thin layer of oxide film has a large number of micro-hole, which can absorb a variety of lubricants, it also suitable for the manufacture of engine cylinders or other wear parts, and its high adsorption capacity makes aluminum more easy to painting with a variety of colors.
As one of the important surface treatment for aluminum alloy, the anodizing overcoming the defects in hardness and wear resistance of aluminum alloys, extending the application range and service life.