Anodizing is a process that converts the surface of aluminum extrusions to aluminum oxide. Anodizing aluminum extrusions is a process that hardens the surface of the aluminum extrusion profile. This protects it from corrosion and makes it more resistant to scratches, dents, and other damage. This conversion provides protection to the aluminum and gives it a different color.

The anodizing process for aluminum extrusions is done in tanks, which are filled with sulfuric acid and an electrolyte. The aluminum extrusions are then put into this tank, and all areas of the aluminum extrusion surface get treated with the acid.

Anodizing can be used for decorative purposes or as corrosion protection. For decorative purposes, the color of anodized aluminum extrusions can be changed by adding dye to the solution in which it is being treated.