Abstract
In this work, wedge mold cast was used to produce a Fe43.2Co28.8B19.2Si4.8Nb4 bulk amorphous alloy. The amorphous character was investigated using transmission electron microscopy (TEM) analysis and X-ray diffractometry (XRD). The thermal stability of the as-processed material was evaluated using differential scanning calorimetry (DSC). The amorphous nature of the wedge cast material was confirmed up to a section thickness of 2 mm. The crystallization behavior, as determined by DSC thermograms, indicated a supercooled liquid region of 41 K. In addition, the corrosion resistance of the amorphous alloy was also assessed and compared with that of a crystalline counterpart. The corrosion properties were examined by open circuit potential versus time measurements, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves. All the results indicated that the corrosion resistance of the amorphous material surpasses that of its crystalline counterpart.
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