By electrolytic action, anodyze is the process of coating or plating a metal (usually aluminum) with a protective material
to coat (a metallic surface) electrolytically with a protective or decorative oxide
To provide an extremely hard non-corrosive oxide film on the surface of aluminum, by electrolytic action The electrochemical process produces an anodic coating by conversion of aluminum into essentially aluminum oxide Appearance depends upon both the alloy involved and the surface preparation Anodic coatings may be transparent, of varying shades of silver, gray or brown, or colors may be incorporated by the use of dyes or pigments