LAUSR

Abstract This study deals with the fabrication and characterization of electrodeposited amorphous–nanocrystalline Fe–Ni–Cr coatings. For this purpose, electrodeposition process was done at different current densities in the range of 10–40 A/dm 2 . To achieve the desired microstructure, the as-deposited coatings were annealed at 250 °C for different periods of time. The prepared samples were characterized using X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). Corrosion behaviors of coatings were also examined in NaCl 3.5% electrolyte by potentiostat analysis. Fully amorphous Fe–Ni–Cr coatings were successfully formed during electrodeposition process at current densities beyond 30 A/dm 2 . The prepared amorphous–nanocrystalline coatings exhibited good corrosion resistance with the corrosion potential and corrosion current density in the range of 375–635 mV and 0.15–5.2 μA/cm 2 , respectively. By annealing the produced fully amorphous coating, Fe-α and FeNi phases precipitated from the amorphous matrix. The precipitation of these phases had deleterious effects on corrosion resistance of as-deposited coatings.