An aqueous bath suitable for the electrodeposition of a bright iron-nickel electrodeposit onto a substrate susceptible to corrosion comprising iron ions, nickel ions, a bath soluble primary nickel brightener containing a sulfo-oxygen group, a bath soluble complexing agent, and an auxiliary bath soluble nickel brightener containing a sulfo-oxygen group, said auxiliary brightener having the general formula:R--SO.sub.2 --R.sub.1 --S--R.sub.2 --SO.sub.3.sup.- M.sup.+,whereinR is an aliphatic hydrocarbon moiety having 1 to 4 carbon atoms, or aryl,R.sub.1 and R.sub.2 are aliphatic hydrocarbon moieties of from 1 to 4 carbon atoms,R and R.sub.1 may be linked together to form an organic radical when R is aliphatic, andM.sup.+ is hydrogen, sodium potassium, lithium or ammonium.