What is Anodizing?
Anodizing... the Finish of Choice
Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized.

The anodic oxide structure originates from the aluminum substrate and is composed entirely of aluminum oxide. This aluminum oxide is not applied to the surface like paint or plating, but is fully integrated with the underlying aluminum substrate, so it cannot chip or peel. It has a highly ordered, porous structure that allows for secondary processes such as coloring and sealing.

Zinc Plating

Zinc coatings prevent oxidation of the protected metal by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. The Zinc oxide can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steel by their oxide layers.
MPP Location providing this process: Illinois

Chromate Conversion Coatings

Chromate conversion coating is a type of conversion coating. It is primarily used as a corrosion inhibitor, primer, decorative finish, or to retain electrical conductivity. 
MPP Location providing this process: Missouri