The Anodising Process

The anodising process involves passing a controlled electrical current through extruded aluminium profiles immersed in an acidic (sulphuric) solution, which then forms a protective film of aluminium oxide on the surface of the aluminium.

Anodising essentially is an induced thickening of the natural protective oxide film on the metal’s surface. It is a conversion of the parent metal and thus is not a “coating” in the usual sense.

It is proven as a very durable finish, of which the lifetime is dependent on the density, thickness and seal quality of the anodic film.