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Abstract
The pitting and passivation film properties of Ce-modified Fe40Mn20Cr20Ni20 high-entropy alloys in artificial seawater were investigated. Corrosion morphology and kinetic potential polarization curves indicated that the doping of Ce changed the compositions of the alloy inclusions, increased the pitting potentials and reduced the alloy's sensitivity to pitting. The reduction of the defect density and the diffusion coefficient of pitting defects (D0) within the passivate film proved the effectiveness of Ce in enhancing the protective property of the passivate film, with Ce-0.10 being the most prominent.
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