Abstract: An aqueous acid electroplating solution and process for electrodepositing an adherent, ductile zinc, zinc-cobalt, zinc-nickel, zinc-cobalt-nickel alloy deposit on a conductive substrate which contains a comparatively low concentration of boric acid to inhibit formation of bath insoluble polyborate compounds and contains an effective amount of a polyhydroxy additive agent containing at least 3 hydroxyl groups and at least 4 carbon atoms of the structural formula: ##STR1## as hereinafter more specifically defined. The electroplating solution further contains conventional acid zinc and zinc alloy bath constituents and supplemental additive agents of the types known in the art.

Abstract: An aqueous bath suitable for electrodepositing zinc and alloys of zinc including zinc-nickel, zinc-cobalt, zinc-nickel-cobalt, zinc-iron, zinc-iron-nickel, and zinc-iron-cobalt containing a brightening amount of an AB-type polyamide brightener in an amount effective to produce an electrodeposit of the desired brightness. The invention further contemplates the process of electrodepositing zinc and zinc alloys of the foregoing types on a conductive substrate employing the aqueous electrolyte.