The corrosion behaviour of Zn-Co compositionally modulated multilayers (CMM) was studied using corrosion potential measurement and the neutral salt spray (NSS) method. It was established that the corrosion potentials of the CMM, deposited from a single bath, are significantly more positive than those deposited from a dual bath. The best corrosion resistance was found for multilayers consisting of four sublayers, each 3.0 mu m thick, deposited both from a dual bath and from a single bath (with an oversublayer of Zn-Co 1%).