OPTIMIZATION OF COMPOSITIONS OF ELECTROLYTES FOR OBTAINING PROTECTIVE-DECORATIVE NICKEL AND ZINC COATINGS FROM ELECTROLYTE-COLLOIDS

The method of planning extreme experiments of Box-Wilson optimized the compositions of electrolytes-colloids of nickel plating and galvanizing for obtaining protective and decorative coatings. The resulting low-concentration electrolytecolloid of nickel plating makes it possible to work at the same current densities as the concentrated one, being more stable in time. In this case, the galvanic precipitation in both cases is fine-crystalline, shiny, and corrosion-resistant. The optimal composition of electrolyte-galvanizing colloid is shown. In the electrolyte of this composition, elastic, semi-zinc coatings are deposited. The current output of zinc was 76-80%. The conducted investigations of electrolytes-colloids of nickel-plating and galvanizing gave information about some features of the mechanism of electrodeposition from these solutions. This opens the prospect of a wider use of these electrolytes in industry.