AQUEOUS ELECTROLYTE FOR BRIGHT COPPER COATING OF STEEL BACKPLATES

摘要

FIELD: physics.;SUBSTANCE: invention relates to copper coating on steel backplate without application of intermediate layer; this invention can be used in mechanic engineering, radio engineering and instrument-making industry. Electrolyte contains 30-50 g of copper sulphate, 120-180 g of sodium pyrophosphate, 70-100 g of disubstituted sodium phosphate, 1-5 mmol/l of N-allyldiethylenetriamine chloride, 1-5 mmol/l of pyridine sulphur triethylammonium chloride and water up to 1 litre.;EFFECT: quality improvement of porous-free copper coatings with mirrored surface.;3 tbl, 3 ex