Anodising is a special case of surface passivation and critical for extended corrosion resistance of aluminium and aluminium alloys.
Anodising gets its name from the location of the part to be anodised, it would be made into the anode of an electrochemical cell rather than the cathode. A low-voltage direct current is applied to the anode and inert cathode. This current causes the anode to react, creating a porous oxide coating on the surface of a metal by altering the crystalline structure and therefore the surface texture. The surface will then contain micropores which will readily take dyes, paint and glues better than bare metal. Once the item has been anodised and fixed, the surface becomes very hard. Coupled with the increased depth of oxide, anodised aluminium has excellent corrosion protection.
We have our own Anodising Kit available as well as Anodise Stripper & Etch and a wide range of Anodising Dyes. Check them out below