Non Chromate, ZVOC Coatings for Steel Substrates on Army and Navy Aircraft and Ground Vehicles: Non Chromate Sealers for Zinc Phosphate
Army Research Laboratory Adelphi United States
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The objective of this demonstration is to determine the viability of non-hexavalent chromium sealers for zinc phosphate as a base for organic coatings. By itself, zinc phosphate does not provide adequate corrosion protection. It is a porous coating that requires a sealer to enhance the corrosion protection and provide a good surface for paint adhesion. The current post treatment for zinc phosphate is a chromic acid rinse with hexavalent chromium, a known carcinogen. A successfuldemonstration of a non-hexavalent chromium sealer will reduce and eventually eliminate the use of hexavalent chromium in phosphating processes resulting in reducing health and environmental risks associated with hexavalent chromium.
- Adhesives, Seals and Binders