ALKALINE ELECTROLYTE FOR ELECTROLYTIC DEPOSITION OF YELLOW TIN BRONZE Russian patent published in 2021 - IPC C25D3/58 

FIELD: electroplating.

SUBSTANCE: invention relates to the field of electroplating, in particular to electrochemical bronzing of metal products, and can be used to create protective and decorative coatings in the production of furniture accessories, in the automotive industry and shipbuilding. An alkaline electrolyte for the electrolytic deposition of yellow tin bronze with a tin content of 9 to 14% in the coating includes nitrilotrimethylphosphonic acid 120-230 g/l, copper (II) sulfate pentahydrate 15-30 g/l, sodium meta trihydrate stannate 4-16 g/l, potassium hydroxide 100-300 g/l and the bottom residue of ribose esterification with aliphatic alcohol with the number of carbon atoms in the C₁₆-C₂₂ chain 0.5-1.5 ml/l at pH from 10 to 12.

EFFECT: development of a stable non-toxic electrolyte for obtaining fine-crystalline coatings of yellow tin bronze with a tin content of 9 to 14% in a wide range of current densities.

1 cl, 5 ex