Abstract
The corrosion performance of a Nickel-free Fe-based bulk metallic glass (BMG), Fe 41Co 7Cr 15Mo 14C 15B 6Y 2 alloy, in Hank’s solution with pH value 7.4 and artificial saliva solution with pH value 6.3, was investigated by electrochemical techniques, aiming to assess the feasibility of Fe-based BMG as potential biomaterial. It was found that Fe 41Co 7Cr 15Mo 14C 15B 6Y 2 BMG shows superior corrosion resistance in both simulated body fluids (SBF). The EIS analysis and cyclic polarization measurements indicated that the Fe 41Co 7Cr 15Mo 14C 15B 6Y 2 BMG has larger polarization resistance value than that of 316L SS. The pitting corrosion potentials of Fe 41Co 7Cr 15Mo 14C 15B 6Y 2 BMG are much higher than that of the 316L SS, resulting in very few ions releasing into the SBFs while a significant amount of Ni and Fe ions release was found for 316L SS under the same condition.
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