Abstract: A bath for the electrodeposition of bright tin-lead alloys which comprises an aqueous acidic bath containing at least one soluble tin compound and one soluble lead compound to which there has been added:A. a lower alkylene oxide condensation product, andB. an effective amount of at least one pyridine or quinoline compound having the structure ##STR1## wherein the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each is a hydrogen or halogen atom, a lower alkyl radical containing a hydroxyl group, an alkenyl radical, the radical (C.sub.n H.sub.2n --CO.sub.2 H in which n has a value from 0 to 6 or a carbamide radical or R.sub.4 and R.sub.5 combined form a divalent radical to provide a compound having the structure ##STR2## in which R.sub.6 is nothing or a hydroxyl radical; Z is nothing, 0.sup.- or a quaternary ammonium forming hydrocarbon radical provided that when Z is nothing, at least one of the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.