Electroplating zinc and bath therefor
AssigneeSchering Corporation
InventorsGerd Senge, Gunter Voss
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Abstract
An alkaline - cyanide free or substantially cyanide-free bath is provided for the electrodeposition of a bright levelled zinc coating; said bath containing a zinc salt, alkali hydroxide and conventional additives and a reaction product of unsaturated nitrogen heterocyclic hydrocarbon compounds containing at least two nitrogen atoms in the ring with epihalogen hydrin or glycerol halogen hydrin.
Claims6
An aqueous alkaline substantially cyanide-free bath for the electrodeposition of zinc, comprising a zinc salt, an alkali hydroxide, and an effective amount of a brightener which is a reaction product of from 1 to 4 moles of a halohydrin selected from the group consisting of an epihalogen hydrin and a glycerol halogen hydrin with from 1 to 2 moles of a heterocyclic compound selected from the group consisting of pyrazol, 1,2,3-triazol, tetrazol, pyridazine, pyrimidine, pyrazine, 1,3,5-triazine, tetrazine, purine, quinoxaline, pteridine, 1,23-oxadiazol, 3-amino-1,2,4-triazol, 1,3,4-thiadazol, 1,2,4-thiadiazine, benzothiadiazine, and 1,2,4-triazol.
Dependencies are inferred from the claim text.