Polyhydroxy compounds as additives in zinc alloy electrolytes

Details Polyhydroxy compounds as additives in zinc alloy electrolytes Polyhydroxy compounds as additives in zinc alloy electrolytes

C - Chemistry, Metallurgy

25

D

204/26

C25D 3/56 (2006.01) C07C 31/18 (2006.01)

Patent

CA 1314512

ABSTRACT OF THE DISCLOSURE An improved aqueous acidic electrolyte suitable for electrodepositing zinc alloys comprising a combination of zinc and at least one metal selected from the group consisting of nickel, cobalt, iron, and mixtures thereof incorporating an effective amount of an additive agent for providing improved grain-refinement, reduced dendrite formation, increased adhesion and ductility, and unexpected adjustment in the codeposition of the alloying metals in the zinc alloy deposit. The additive agent comprises a bath soluble polyhydroxy compound having three ox more hydroxyl groups at least one of which is substituted with a polyoxyalkylene group. The present invention further encompasses the process of employing the aforementioned electrolyte for the deposition of functional and decorative zinc alloy electrodeposits.

530934

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