Chromate conversion coatings are a variable group that can be made as a single finish by itself, or as a secondary after treatment of another metal finish and is generally applied to aluminum. This chemical film, also called by the trade names of Alodine or Iridite, is a thin, clear, blue, yellow or litmus conversion coating used as primer for painting, general protection to prevent the aluminum from oxidizing. When we say it is a secondary post treatment it is understood as a chromate on another finish such as zinc or cadmium.

 

Chromate Conversion Coatings Features:

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• Good base for painting applications

• Protects against corrosion

• Provides good electrical properties

 

Applications:

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• Adhesion of paint or other organic coating

• Economical Immersion Protective Coating for Aluminum.

• Do not use electric current.

• Applied by brush in the field as retouch for damaged parts.

• In mixed assemblies of metals that cannot be anodized.