Electrochemical Corrosion Behavior of Different Heat-Treatment Temperature Fe-Based Bulk Amorphous Alloy

Abstract

Fe41Co7Cr15Mo14C15B6Y2(at%) bulk metallic glass was prepared by copper mold casting. Nano-crystalline Fe41Co7Cr15Mo14C15B6Y2alloys were obtained by annealing. The influence of heat treatment at different temperatures in the alloy microstructure was identified by X-ray diffraction (XRD), and a comparative study of the electrochemical corrosion behaviors of amorphous and amorphous/nanocrystalline alloys was performed by potentiodynamic polarization method and electrochemical impedance spectroscopy (EIS) in 1.5M HCI solution, and the corrosion morphologies of the samples were observed by scanning electron microscopy (SEM). The results show amorphous alloy plays excellent anti-corrosion ability than that of the heat-treated samples, and the anti-corrosion ability of amorphous/nanocrystalline alloys decrease with the increasing of heat-treatment temperature.