Trivalent Chromate Pretreatment
This information reflects our best understanding of product composition in 2015.
Chromate treatments are primarily used as passivation (corrosion reduction) coatings to protect newly galvanized surfaces which are susceptible to white rust. Chromium coatings may also serve as conversion coatings which prepare the surface for...
Chromate treatments are primarily used as passivation (corrosion reduction) coatings to protect newly galvanized surfaces which are susceptible to white rust. Chromium coatings may also serve as conversion coatings which prepare the surface for paint adhesion. This Common Product describes a trivalent chromate treatment, which is an alternative to coatings that use hexavalent chromium. It should be noted that while trivalent chromium is available for some formulations, transparency is limited and hexavalent chromium is still widely used. Chromate treatments are appropriate for a variety of metal surfaces, including those consisting of zinc, cadmium, aluminum and alloys of these metals among each other and/or with iron or other metals.