Anodizing
Commonly used for aluminum, anodizing is an electrochemical process by which a protective layer creates on the surface of the treated metal, capable of protecting it from corrosive agents.
As well as to improve the corrosion resistance, anodization is typically used to increase the surface hardness, and therefore the resistance to wear and abrasion, but also to provide a better thermal insulation of the piece or to improve other characteristics such as adhesion of glues or paintings. In other cases it can also be a simple aesthetic choice.
