METHOD OF PREPARATION OF PHOSPHONIC ELECTROLYTES AND SOLUTIONS Russian patent published in 2008 - IPC C25D3/00 C23C18/31 

FIELD: metallurgy.

SUBSTANCE: invention refers to electrolytic metallurgy and can be used at preparation of phosphonic complex electrolytes for electrochemical and chemical copper, zinc, nickel and cobalt coating. The method includes solution of such compounds in water, which are the source of cations of metals, and solution of a compound, which is the source of anion of nitrilotri(methylene phosphonic) acid; at that as sources of cations of metals and anion of nitrilotri(methylene phosphonic) acid crystal nitrilotri-(methylenphosphonates)(2-) of metals are used from the group containing copper, zinc, nickel and cobalt.

EFFECT: facilitates preparation of complex phosphonic electrolytes and solutions of specified composition and concentration not containing undesirable impurities, it also facilitates upgraded processibility of the method of preparation of electrolytes and solutions, and expands an arsenal of existing methods of preparation of nitrilotri-(methylenphosphonates) electrolytes and solutions for coating with metals and alloys.

5 cl, 6 ex