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

1988-09-12

1990-07-17

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148262, C23C 2218

Patent

active

049419307

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: 2375468 (1945-05-01), Clifford
patent: 2866728 (1958-12-01), Warinner
patent: 3015594 (1962-01-01), Russel
patent: 3450578 (1969-06-01), Seimund
patent: 3860455 (1987-01-01), Hansen

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