Abstract: In order to produce bright to brilliant, leveled copper-tin alloy coatings, galvanic baths are used which contain 1 to 60 g/l copper in the form of copper(I) cyanide, 1 to 50 g/l tin in the form of alkali stannate, 0 to 10 g/l zinc in the form of zinc cyanide, 1 to 200 g/l of one or several complex binders (e.g., oligosaccharides and/or polysaccharides), 1 to 100 g/l free alkali metal cyanide, 1 to 50 g/l free alkali metal hydroxide, 0 to 50 g/l alkali metal carbonate 0.01 to 5 g/l brightener (e.g., alkene sulfonate, alkyne sulfonate, pyridine compounds or sulfur-containing propane sulfonates) and 0 to 100 mg/l lead as lead(II) acetate or lead(II) sulfonate.

Abstract: There is provided a bath composition for the electrolytic deposition of copper-tin alloy coatings which contain besides the customary components (copper cyanide, stannate, complex former, free cyanide, and hydroxide) at least one organic material from at least one of the following groups:(a) fatty acid amidoalkyl dialkylamine oxides of the general formulaR.sub.1 CO--NH(CH.sub.2).sub.n --N(R.sub.2).sub.2 .fwdarw.0,whereinR.sub.1 is an alkyl group having 11 to 17 carbon atoms,R.sub.2 is an alkyl group having 1 to 5 carbon atoms, and n is 1-30(b) fatty acid amidoalkyl-dialkylamine betaines of the general formulaR.sub.1 CO--NH(CH.sub.2).sub.n --.sup..sym. N(R.sub.2).sub.2 --CH.sub.2 --COO.sup..crclbar.,whereinR.sub.1 is an alkyl group having 11 to 17 carbon atoms,R.sub.2 is an alkyl group having 1 to 5 carbon atoms, andn is 1-30, and(c) ethoxylated naphthols of the general formula ##STR1## wherein R.sub.3 is H or O(CH.sub.2 --CH.sub.2 O).sub.m H,R.sub.4 is O(CH.sub.2 CH.sub.2 O).sub.m H or Hm=10 to 14, e.g.

Abstract: There is provided a bath composition for the electrolytic deposition of copper-tin alloy coatings which contain besides the customary components (copper cyanide, stannate, complex former, free cyanide, and hydroxide) at least one organic material from at least one of the following groups:(a) fatty acid amidoalkyl dialkylamine oxides of the general formulaR.sub.1 CO--NH(CH.sub.2).sub.n --N(R.sub.2).sub.2 .fwdarw.0,whereinR.sub.1 is an alkyl group having 11 to 17 carbon atoms,R.sub.2 is an alkyl group having 1 to 5 carbon atoms, andn is 1-30(b) fatty acid amidoalkyl-dialkylamine betaines of the general formulaR.sub.1 CO--NH(CH.sub.2).sub.n --.sup..sym. N(R.sub.2).sub.2 --CH.sub.2 --COO.sup..crclbar.,whereinR.sub.1 is an alkyl group having 11 to 17 carbon atoms,R.sub.2 is an alkyl group having 1 to 5 carbon atoms, andn is 1-30, and(c) ethoxylated naphthols of the general formula ##STR1## wherein R.sub.3 is H or O(CH.sub.2 --CH.sub.2 O).sub.m H,R.sub.4 is O(CH.sub.2 CH.sub.2 O).sub.m H or Hm=10 to 14, e.g.