Anodizing is a common process in fabrication and surface treatment technology, often used to increase the hardness and wear resistance of aluminum alloys. However, this process is not suitable for die cast aluminum profile housings. The reasons are as follows:

First, let's understand what anodizing is. Anodizing is an electrochemical process where metal atoms on the surface of an aluminum alloy lose electrons through an electric current, forming an oxide layer. This process requires specific voltage and current and demands good contact between the aluminum substrate and the electrolyte.

 /Anodizing process/

Now, considering the structure of die-cast aluminum profiles, due to air bubbles and shrinkage holes produced during the die-casting process, as well as the solidification shrinkage of molten metal during cooling, tiny defects and voids exist inside the die-cast aluminum profile. These voids prevent the surface of the aluminum substrate from achieving sufficient cleanliness, thus affecting the anodizing effect. Additionally, the uniform wall thickness of die-cast aluminum profiles means that thicker sections may not be adequately covered by the oxide film, reducing their performance.

 /Die-casting aluminum profiles after anodic oxidation effect/

Moreover, die-cast aluminum profiles have relatively low hardness, and a stearate film is produced during the anodizing process, which can further reduce the hardness of the aluminum substrate. As a result, the wear resistance and hardness of die-cast aluminum profiles may be compromised after anodizing.

 /Die-casting aluminum profiles after spraying/

In summary, die-cast aluminum profiles are not suitable for anodic oxidation treatment due to their special structure and properties. For applications requiring improved wear resistance and hardness, other surface treatments like spraying and plating can be considered. It is also possible to mitigate issues with die-cast aluminum profiles by altering the material design or manufacturing process.