Electrodeposition of Fe-Ni-Cr-based alloys was investigated in a divided and undivided cell. Using formic acid (HCOOH) as a complexing agent, a chloride-hypophosphite solution was developed. Effects of composition on the morphology, structure, and corrosion behaviour of the alloys were studied. Effects of plating variables on composition of the alloys and current efficiency are also reported. Energy dispersive spectroscopy (EDS) and Auger electron spectroscopy (AES) were used to evaluate alloy composition. These alloys were determined to be amorphous by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Scanning electron microscopy (SEM) photomicrographs were obtained of the surface of selected deposits. The corrosion behaviour of the alloys was studied in 0.9 wt % NaCl solution. The alloys containing phosphorus and carbon were found to be less active than those containing only phosphorus or carbon. The corrosion potential of Fe-Ni-Cr-based deposited alloys is more noble the higher the chromium content. Generally, Fe-Ni-Cr-based alloys exhibit a wide passivation range. Knoop hardness of the deposited alloys was determined. It is found that both phosphorus and carbon improved the Knoop hardness value of the deposited alloys.