Abstract
Fe 55 Ni 2 Cr 12 Mo 10 B 6 C 13 Y 2, Fe 55 Cu 2 Cr 12 Mo 10 B 6 C 13 Y 2 and Fe 55 Nb 2 Cr 12 Mo 10 B 6 C 13 Y 2 alloys with diameter of 4 mm were produced by copper mold casting. The effect of alloying additions (Ni, Cu or Nb) on corrosion resistance of Fe 55 Nb 2 Cr 12 Mo 10 B 6 C 13 Y 2, Fe 55 Ni 2 Cr 12 Mo 10 B 6 C 13 Y 2 and Fe 55 Cu 2 Cr 12 Mo 10 B 6 C 13 Y 2 alloys was studied by polarization curves and electrochemical impedance spectroscopy (EIS). The results show that Fe 55 Ni 2 Cr 12 Mo 10 B 6 C 13 Y 2 and Fe 55 Cu 2 Cr 12 Mo 10 B 6 C 13 Y 2 alloys can be cast to form bulk metallic glasses. Fe 55 Ni 2 Cr 12 Mo 10 B 6 C 13 Y 2 and Fe 55 Cu 2 Cr 12 Mo 10 B 6 C 13 Y 2 amorphous alloys with passive potential about 1 500 mV exhibit good corrosion resistance in NaCl solution of 5% and 1 mol/L HCl solution. The passive current density of the alloy with Ni addition is lower than that of other alloys. EIS results only show one impedance element. Amorphous alloy Fe 55 Ni 2 Cr 12 Mo 10 B 6 C 13 Y 2 with larger charge transfer reaction resistance indicates good corrosion resistance.
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