The anomalous electrodeposition of zinc+cobalt alloy was studied in chloride medium over vitreous carbon and nickel electrodes. Potentiostatic techniques, stripping methods and morphological studies allowed us to analysis of the process. Potentiodynamic stripping proves to be useful for the analysis of the thin films of alloy deposits obtained at both low and high metal concentrations. Results indicate the initial deposition of some cobalt over the electrode, more favoured on nickel substrate. The onset of the anomalous codeposition can be justified by zinc (ll) adsortion on the initial cobalt, which hinders later cobalt deposition and favours zinc deposition. Zinc-rich phases are obtained avoiding the depletion of zinc (ll) near the electrode.