Abstract: The Cu25Nb75 and Ni45Nb55 amorphous films with about 50Onm thickness were pre-pared by ion beam assisted deposition (IBAD). Potentiodynamic polarization measure-ment was adopted to investigate the corrosion resistance of samples and the tests were carried out respectively in 1mol/L H2SO4 and NaOH aquatic solution. The corrosion performance of the amorphous films was compared with that of multilayered and pure Nb films. Experimental results indicated that the corrosion resistance of amorphous films was better than that of the corresponding multilayers and pure Nb films for both Ni-Nb system with negative heat of formation and Cu-Nb system with positive heat of formation.

Key words: amorphous film, ion beam assisted deposition, corrosion resistance,