Corrosion Resistance of Fe69.9Cr22.6Mo5.7Cu0.6Zr0.1Nb0.8W0.3 Amorphous Alloy in Chlorine-Containing Solution at Different Temperatures

In order to study the corrosion performance of iron-based amorphous alloys in chlorine-containing solution at different temperatures, Fe69.9Cr22.6Mo5.7Cu0.6Zr0.1Nb0.8W0.3 amorphous ribbons were prepared using arc melting combined with vacuum melt spinning. The effect of temperature on corrosion resistance of alloy in chlorine-containing solution was studied by potentiodynamic polarization curves, impedance spectroscopy and immersion tests. Results showed that, compared to 316 stainless steel, the alloy possessed a typical amorphous structure, and its corrosion resistance was significantly enhanced. In a 3.5% (mass fraction) NaCl solution at 25 ℃, the corrosion resistance of its free surface was comparable to that of the roll surface, with the self-corrosion current density being approximately 18.9% and 15.7% of that of 316 stainless steel, respectively. The alloy exhibited stable passivation characteristics in the NaCl solution, but with a wider passivation range ΔE. At 45 ℃ in the NaCl solution, the differen