What is the use of anodizing?

 　　Anodizing is most commonly used to improve the corrosion resistance of certain types of aluminum alloys. Aluminum alloys affected by the marine environment typically benefit from anodizing. Hull, dock components, and oil drilling platform structures are common examples of these.

　　Anodizing is also used for wear control. Compared to steel or titanium, unoxidized aluminum is a relatively soft material. On the other hand, alumina is a very hard material. In fact, alumina is often used in sandpaper due to its high hardness. When the anodizing process forms an aluminum oxide layer on the outside of the aluminum alloy, the wear resistance of aluminum oxide is greatly improved due to its hardness. The application of anodizing to improve wear resistance includes aluminum components that continuously move and come into contact with other materials.

　　Dyeing is another popular application of anodized aluminum oxide. The alumina layer generated on the aluminum alloy during the anodic oxidation process is porous. This allows some dyes to be absorbed by the oxide layer. Aluminum alloys that previously could not be dyed can now be made into various colors. The application of dyed anodized aluminum oxide includes artwork and aluminum signage.