Chemistry: electrical and wave energy – Processes and products
Patent
1988-04-25
1989-12-26
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 442, 204 445, C25D 356, C25D 548
Patent
active
048896020
ABSTRACT:
The invention provides an electroplating bath for forming a zinc-nickel alloy coating consisting essentially of water, about 1 to 70 grams/liter of zinc, about 0.6 to 118 grams per liter of nickel, at least one compound from the group consisting of (i) aliphatic amines in an amount not more than 16 grams/liter, (ii) polymers of aliphatic amines in an amount not more than about 20 grams per liter and (iii) a compound selected from the group consisting of hydroxyaliphatic carboxylic acids and salts thereof in an amount from 0 to 2 mols/liter, said bath having a pH of more than 11. The invention also provides an electroplating method for forming a chromate coating on a zinc-nickel alloy coating electrolytically deposited from the electroplating bath defined in the preceding sentence on electrically conductive metalics matrix material, and forming a chromate coating on the zinc-nickel alloy coating by means of a chromate treatment.
REFERENCES:
patent: 4417956 (1983-11-01), McCoy
patent: 4591416 (1986-05-01), Kamitani et al.
A. V. Ryabchenkov et al., Translation from Zhurnal Prikladnoi Khimii, vol. 47, No. 7, pp. 1553-1558, Jul. 1974.
Hanagata Haruo
Igarashi Hidesato
Igarashi Shuji
Murai Toshiaki
Oshima Katsuhide
Dipsol Chemicals Co., Ltd.
Kaplan G. L.
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