Zinc-alloy electrolyte and process

Details Zinc-alloy electrolyte and process Zinc-alloy electrolyte and process

C - Chemistry, Metallurgy

25

D

204/26

C25D 3/56 (2006.01)

Patent

CA 1255619

ABSTRACT An aqueous acidic electrolyte and process for electro- depositing zinc alloys comprising zinc-nickel, zinc- cobalt and zinc-nickel-cobalt on a conductive substrate incorporating a brightener system including a ducti- lizing agent present in an amount sufficient to reduce stress and fracturing of the zinc alloy electro- deposit providing for improved corrosion resistance of the deposit. The ductilizing agent comprises a compound or a bath soluble and compatible salt thereof having the structural formula: Image and Image wherein: R is H or C6-C10 aryl, or C6-C20 alkyl aryl in which the alkyl group is C1-C4; or C1-C22 alkyl, or C2-C10 heterocyclic nitrogen compounds having at least one tertiary or quaternary ring containing nitrogen; as well as the mono, di or tri substituted derivatives thereof including -OH, -SO3H or -COOH; the Group I and II metal and NH4 salts thereof; and the aldehyde, ketone and ether derivatives thereof; X is R or -OR' or -NR2' in which R' is H or a C1-C4 aliphatic radical; and Y is H or SO3H.

491611

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