Anodic surface treatment

What is anodization ?

Anodic oxidation is a surface treatment method that allows you to apply an oxide film on an aluminum plate. Like chromium plating, this process will trigger the anodizing process on an aluminum surface with an applied current. In order to improve the corrosion resistance of aluminum alloy, the surface strengthening technology is adopted. The following describes several key aspects for anodic oxidation :

Types of aluminum anodic oxidation

There are three methods of anodic oxidation of aluminum, including type 1, type 2 and hard coating. The anodic oxidation of 1 type will form a very thin oxide film on the aluminum plate, which will make the aluminum plate dyeable during die casting and have poor corrosion resistance. Type 2 anodizing can form a thicker oxide film on the aluminum foil so you can use it more easily for coloring. At the same time, it also has strong corrosion resistance.

Advantages of anodic oxidation

The hard anodic oxide film will be suitable for the aluminum material with the largest oxide film thickness and is also the most easily applied colorant. In addition, you can also obtain the best corrosion resistance and wear resistance.

Anode treatment process

The anodic oxidation process is similar to the chromizing process in some aspects. First, you need to clean aluminum die casting from different contaminated surfaces. Secondly, aluminum die casting billet was added to the electrolyte solution. The third step, you have to apply a current to start the anodic oxidation reaction.