Process. Chromate conversion coatings are usually applied by immersing the part in a chemical bath until a film of the desired thickness has formed, then removing the part, rinsing it, and letting it dry. The process is usually carried out at room temperature, with a few minutes of immersion.

Where are chromates used?

Chromates and dichromates are used in chrome plating to protect metals from corrosion and to improve paint adhesion. Chromate and dichromate salts of heavy metals, lanthanides and alkaline earth metals are only very slightly soluble in water and are thus used as pigments.

What do chromates do?

Chromate conversion coating for aluminum and other types of metal is a chemical immersion process that is used to passivate and convert the surface properties of the substrate. The trivalent chromate conversion coating process provides outstanding corrosion resistance and conductivity, without any measurable buildup.