Phosphate coating composition and method of applying a...

Details Phosphate coating composition and method of applying a... Phosphate coating composition and method of applying a...

C - Chemistry, Metallurgy

23

C

148/17

C23C 22/18 (2006.01) C23C 22/12 (2006.01) C23C 22/36 (2006.01) C23C 22/83 (2006.01)

Patent

CA 2035048

ABSTRACT OF THE DISCLOSURE 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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