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

1986-09-26

1988-12-27

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23C 2212

Patent

active

047938676

ABSTRACT:
This invention relates to a method of coating metal surfaces including zinc-coated steel with zinc and nickel 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 or manganese ions in relative proportions to cause the nickel or manganese ions to form a crystalline coating on the surface in combination with the zinc and phosphate.

REFERENCES:
patent: 4389260 (1953-06-01), Hauffe
patent: 4486241 (1984-12-01), Domofario
patent: 4612060 (1986-09-01), Kojima
WO 8503089, 7-1985, Zurrilla.

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