Anodizing is a surface treatment process that uses electrochemistry to form a layer of Al2O3 (aluminum oxide) film on the surface of aluminum and aluminum alloy. Through anodic oxidation, the surface state and performance of the material can be changed, thus improving corrosion resistance, enhancing wear resistance and hardness, and protecting the metal surface. Non-ferrous metals or their alloys (such as aluminum, magnesium and their alloys) can be anodized. This method is widely used in mechanical parts, aircraft and automobile parts, precision instruments and radio equipment, daily necessities and architectural decoration.


Anodizing Sample Display

Aluminum part anodizing

Anodizing die cast aluminum


Metal turning

Anodizing Specifications

Features Info
Material Aluminum
Plate type Tin, Nickel, Electroless Nickel
Texture Smooth, glossy finish
Applications Electrical connections, jewelry, radiation shields
Subtypes Galvanizing, nickel plating, tin plating, passivation


Anodizing Considerations


Tolerances should account for plating thickness, and the part’s ability to fit into a larger assembly should be factored into all critical dimensions and tolerances. Electroplating involves the use of current. This means the overall geometry of the part will influence the current distribution across its surface, sometimes unevenly. However, there are some advanced plating processes that can prevent excessive plating buildup on bends, threads and sharp corners. Plating materials should be chosen based on the desired characteristics of the final part: corrosion resistance, strength, etc.


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