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US 5,932,292 AGranted
Zinc phosphate conversion coating composition and process
AssigneeHenkel Corporation
InventorsYasuhiko Nagashima, Hitoshi Ishii
Life of this patent
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Abstract
A zinc phosphate conversion coating which is accelerated only with nitrogen free organic peroxides is low-polluting and able to form uniform, fine, and dense conversion coatings that exhibit an excellent paint adherence when thin and excellent lubricity/lubricant carrier quality when thick.
Claims18
An aqueous acidic phosphate conversion coating treatment composition for metal surfaces, said composition consisting essentially of water, zinc ions, phosphate ions, and an accelerating component consisting essentially of one or more organoperoxides.
Dependencies are inferred from the claim text.