The anodic film layer produced in continuous anodising can provide a number of different properties unconnected with corrosion protection. Typically, very thin anodic layers will be employed.
For example, it may be used as a surface preparation for coating. It is used to facilitate the laser welding process of spacer bars for double glazing. It can be used on welded tube products to give a purely cosmetic aspect. It is also used when combined with nano coatings on highly reflective solar products.