Composition including an additive to sulphamate electrolytes for

Details Composition including an additive to sulphamate electrolytes for Composition including an additive to sulphamate electrolytes for

1985-07-03

1986-04-29

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 312, C25D 318

Patent

active

045855315

ABSTRACT:
There is added to sulphamate electrolytes for depositing hard nickel layers based on nickel sulphamate an additive comprising of boric acid, nickel chloride and a surface-active substance which represents a derivative of sulphamoylbenzoic acid with the general formula ##STR1## in which X and Y are hydrogen, halogen, ##STR2## alkyl radical or a mixture of these compounds in a concentration from 0.1 to 4 g/l. These hard nickel layers are used in the manufacture of matrices for different work-pieces.

REFERENCES:
patent: 3990955 (1976-11-01), Dill
patent: 4049509 (1977-09-01), Such et al.

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