Electroplating composition and process

Details Electroplating composition and process Electroplating composition and process

1991-11-27

1993-03-16

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly alloy coating

106 116, 106 117, 205269, C25D 356, C25D 312

Patent

active

051941406

ABSTRACT:
The invention presented relates to (a) novel complexes of cobalt salts and copolymers of maleic anhydride, ethylenediamine and epichlorohydrin; (b) electroplating compositions for deposit of zinc-cobalt alloys wherein the cobalt is employed in the form of a complex of the above type; and (c) a process for the electrodeposition of bright zinc-cobalt alloys using the latter compositions. Optionally, the electroplating compositions also contain minor amounts of at least one of poly(ethylenediamine); a polycondensate of a di-alkyl diallylammonium chloride and sulfur dioxide; a polycondensate of ethylenediamine, epichlorohydrin and dichloroethane; a polycondensate of piperazine, formaldehyde, epichlorohydrin and thiourea; the reaction product of dimethylaminopropylamine with epichlorohydrin; a polycondensate of tetraethylenepentamine and epichlorohydrin; the reaction product of imidazole with epichlorohydrin; the reaction product of hexamethylenetetramine with epichlorohydrin; a polycondensate of poly(ethylenediamine) and epichloroydrin; or a polycondensates of morpholine, imidazole, and epichlorohydrin.

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