Cyanide-free alkaline zinc baths

Details Cyanide-free alkaline zinc baths Cyanide-free alkaline zinc baths

1978-05-17

1979-09-04

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 322

Patent

active

041667786

ABSTRACT:
Cyanide-free alkaline zinc electroplating baths for depositing highly lustrous zinc coatings on steel or iron. The results are attained with alkaline zinc baths containing a reaction product obtained by conversion of substantially equal molar quantities of (a) a reaction product of a nitrogen compound containing at least two nitrogen atoms with an epihalohydrin, or a mixture of such reaction products, with either (b1) a reaction product of an alcohol or a carboxylic acid with an epihalohydrin, or a mixture of such reaction products, and/or (b2) a pyridine compound having from 1 to 3 methyl or ethyl groups and/or 1 to 3 carboxylic groups, or salts of (b1) and (b2). Zinc coated objects produced with the baths can be tempered without adversely affecting the zinc coating.

REFERENCES:
patent: 3655534 (1972-04-01), Kampe
patent: 3840444 (1974-10-01), Koch
patent: 3871974 (1975-03-01), Duchene et al.
patent: 3884774 (1975-05-01), Kessler
patent: 3954575 (1976-05-01), Yanagida et al.
patent: 3972789 (1976-08-01), Eppensteiner et al.
patent: 3974045 (1976-08-01), Takahashi et al.
patent: 4045306 (1977-08-01), Senge et al.
patent: 4046648 (1977-09-01), Rushmere

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