Metal anodizing helps reduce corrosion and water damage.

Metal anodizing also helps paint and other coatings stick to metal surfaces better.

From Wikipedea; Anodizing

"Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called "anodizing" because the part to be treated forms the anode electrode of an electrical circuit. Anodizing increases corrosion resistance and wear resistance, and provides better adhesion for paint primers and glues than bare metal".

Anodizing method can be prevented.

Anodizing.

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish.

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