GB638307A - Improvements in the electrodeposition of metals or alloys - Google Patents

Abstract

638,307. Electrodeposition of metals and alloys. UDYLITE CORPORATION. June 24, 1947, No. 16596. Convention date, March 3, 1941. [Class 41] A process of electro-depositing metals or alloys includes electrolyzing an aqueous acid solution of (a) a salt of copper or antimony, or (b) a salt of nickel, cobalt, iron, zinc, cadmium, or mixtures thereof, with or without the addition of a salt of a further metal other than copper or antimony, the solution also containing a minor proportion of a soluble aliphatic sulphomono-carboxylic acid ester of a water-soluble aliphatic polyhydric alcohol partially esterified with a fatty acid containing from 8 to 18 carbon atoms in the molecule, the sulpho-monocarboxylic acid radical containing from 2 to 6 carbon atoms. The sulpho-mono-carboxylic acid ester may be for a sulphoacetate, sulphopropionate, sulphobutyrate, sulphovalerate or sulphoacrylate. The amount used may be from .05 to .5 grams per litre. A specially suitable ester is a soluble sulphoacetate of glycerin or of a glycol partially esterified with fatty acids comprising predominantly lauric acid. The polyhydric alcohol may be selected from glycerin, glycols and polyglycols, polyglycerols, carbohydrates and sugar alcohols. The electrolyte particularly in the electrodeposition of nickel may also contain a brightener in the form of a soluble compound containing the radical -SO2.N=. Specification 525,847 is referred to.