Phosphate coating composition and method of applying a zinc-nick

Details Phosphate coating composition and method of applying a zinc-nick Phosphate coating composition and method of applying a zinc-nick

1992-04-30

1993-08-24

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

C23C 2218

Patent

active

052385060

ABSTRACT:
This invention relates to a method of coating metal surfaces including zinc-coated steel with zinc, nickel and manganese phosphate crystals for the purposes of improving paint adhesion, corrosion resistance, and resistance to alkali solubility. Potassium, sodium, or ammonium ions present as a phosphate salt are combined with zinc ions and nickel and manganese ions in relative proportions to cause the nickel and manganese ions to form a crystalline coating on the surface in combination with the zinc and phosphate.

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patent: 4678519 (1987-07-01), Schapira et al.
patent: 4681641 (1987-07-01), Zurellg
patent: 4793867 (1988-12-01), Charles
patent: 4849031 (1989-07-01), Hauffe et al.

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