Patent ID: 6652728
Filing Date: 2003-11-25
Classification: C25D

Abstract:
Aqueous alkaline cyanide-free bath for the galvanic deposition of zinc or zinc alloy coatings on substrate surfaces, the bath comprising:(a) a source of zinc ions; (b) hydroxide ions; and (c) a polymer soluble in the bath and having the general formula A â€ƒwherein m has a value 2 or 3; n has a value of at least 2; R1, R2, R3 and R4, which may be the same or different, each independently denote methyl, ethyl or hydroxyethyl; p has a value in the range from 3 to 12; and Xâˆ’ denotes Clâˆ’, Brâˆ’ and/or I.