Phosphate conversion coatings for composite metals

Details Phosphate conversion coatings for composite metals Phosphate conversion coatings for composite metals

1987-09-17

1988-10-04

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 615Z, C23C 2233

Patent

active

047754273

ABSTRACT:
A process for forming a protective coating for protecting a substrate metal from corrosion and improving the adhesion of subsequently applied coatings, comprising treating the metal with an aqueous acidic solution containing molybdate in an amount of from 0.01 to 10.0 g/l, chromium in an amount of from 0.01 to 10.0 g/l, fluoride in an amount of from 0.01 to 10.0 g/l, phosphate in an amount of from 0.01 to 10.0 g/l, zinc in an amount of from 0.005 to 1.0 g/l, and acetate in an amount of from 0.01 to 10.0 g/l. The process successfully treats a variety of metals, and provides high-quality coated composites.

REFERENCES:
patent: 3248249 (1966-04-01), Collins
patent: 3272663 (1966-09-01), Ramstein
patent: 4146410 (1979-03-01), Reinhold
patent: 4169741 (1979-10-01), Lampatzer
patent: 4264378 (1981-04-01), Oppen
patent: 4680064 (1987-07-01), Portz et al.

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