Abstract:CrNbTiVZr high-entropy alloy was prepared by vacuum arc melting and heating treatment. The microstructure, electrochemical corrosion behavior in simulated PEMFC environment and the composition of the passive film were investigated by XRD, SEM, XPS, potentiodynamic and potentiostatic polarization test. The results showed that the as-cast and annealed CrNbTiVZr high-entropy alloy were both composed of the disordered BCC phase enriched Ti, Nb and the Laves phase enriched Cr, V and Zr elements. The as-cast and annealed alloy both had good corrosion resistance and stability in the simulated PEMFC cathode environment due to the corrosion current density were one order of magnitude lower than that of the 304SS, but the corrosion resistance of both alloy in the anode environment were comparable to that of the 304SS, which the as-cast alloy had poor stability. The good corrosion resistance of the alloy in the cathode environment was mainly related to the formation of the dense passive film of Cr2O3, Nb2O5, V2O3, Ti2O3 and ZrO2.
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