Chemistry: electrical and wave energy – Processes and products
Patent
1981-02-10
1983-08-09
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 55R, C25D 322, C25D 324
Patent
active
043977170
ABSTRACT:
A bath for electoplating zinc containing in aqueous solution a zinc salt, an alkali metal hydroxide, optionally, an aromatic aldehyde or ketone and other usual additives and, if desired, an alkali metal cyanide and further, as a brightener, one or more reaction products obtained by reacting (a) an epihalohydrin with a heterocyclic nitrogen compound containing at least two reactive nitrogen atoms which compound may be substituted by 1 or 2 methyl, ethyl or amino groups or of a mixture of such reaction products of the epihalohydrin and the nitrogen compound in a molar ratio of 1:1 with (b) ammonia, an aliphatic amine, polyamine and/or polyimine in a molar ratio of 1:0.3 to 1:1 said bath yielding highly brilliant zinc coatings which may be up to 40 .mu.m thick and are abrasion resistant and resistant to temperatures up to about 220.degree. C. in a range of current densities of from 0.5 to 5 amps/dm.sup.2.
REFERENCES:
patent: 3974045 (1976-08-01), Takahashi et al.
patent: 4045306 (1977-08-01), Senge et al.
patent: 4169771 (1979-10-01), Creutz et al.
patent: 4169772 (1979-10-01), Lowery et al.
patent: 4188271 (1980-02-01), Eckles et al.
Acimovic Simeon
Kunz Volker G.
Lindemann Karl-Heinz
Elektro-Brite GmbH & Co. KG.
Kaplan G. L.
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