Abstract: The instant invention is directed to an aqueous bath for the electrodeposition of bright metal deposits, and more particularly to a bath composition which provides upon the basis metal an electrodeposit having improved brightness, particularly in low current density areas, and as well, a condition of ductility markedly better than that which characterizes certain prior art baths. The electroplating bath composition of this invention embodies a polyethylenimine having the general empirical formula --[C.sub.2 H.sub.5 N].sub.x --, and a sulfonating agent for the polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain. The nitrogen substituted sulfamate unit of the reaction product is represented by the formula: ##STR1## where, M = H, Li, Na, K, or, NH.sub.4. The ratio of these nitrogen substituted sulfamate units to amino units, --[CH.sub.2 CH.sub.

Abstract: 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.