FIELD: electroplating, namely application of bright copper coatings upon steel without intermediate layer. SUBSTANCE: electrolyte contains copper sulfate, 200-250 g/l; sulphurous acid, 40-50 g; 2-nitrobenzoquinone-1,4, (1,4 1•10-4-1•10-3) mol/l; benzotriazol, (1•10-4-5•10-4) mol/l; water, up to 1 l. EFFECT: possibility for applying high-quality electroplated deposits with small-crystal structure, uniform, smooth, with good adhesion and spicular surface. 2 notes, 4 tbl
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