Composition and process for substitutionally plating...

Details Composition and process for substitutionally plating... Composition and process for substitutionally plating...

C - Chemistry, Metallurgy

23

C

C23C 22/07 (2006.01) C23C 18/32 (2006.01) C23C 22/78 (2006.01)

Patent

CA 2158856

An acidic substitutional plating bath for zinciferous surfaces, particularly zinciferous metal-plated steel sheet, with which sludge production and equipment corrosion are inhibited and which has an improved heavy metal ion deposition efficiency is provided by an aqueous composition that has a pH of 2 to 4.5 and that contains 1.5 to 40 g/L of at least one heavy metal ion selected from nickel iron, and cobalt; 0.5 to 10 g/L of phosphate ions; 1 to 250 g/L of sulfate ion; and 1 to 20 g/L of organic acid.

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