ELECTROLYTE FOR DEPOSITION OF COPPER-ZINC ALLOY Russian patent published in 1999 - IPC

FIELD: electroplating, in particular, electrolytic deposition of alpha-brass, i. e. copper-zinc alloy. SUBSTANCE: electrolyte contains copper sulfate, zinc sulfate and trilon B. Additionally, electrolyte comprises aluminum sulfate and polyethylene glycol ethers of high-molecular alkyl phenols (OP-10) at the following ratio of component, g/l: copper sulfate, 25-35; zinc sulfate, 45-55; trilon B, 69-71; aluminum sulfate, 39.0-40.5; and OP-10, 3.5-4.5. Use of the electrolyte makes it possible to deposit bright, semilustrous coatings with high-strength adhesion to base. Coatings withstand bending at an angle 45 deg without fracture and separation from the base when heated for 1 h up to 250 C with subsequent sharp cooling. EFFECT: high-quality coatings with high corrosion resistance. 1 tbl