biostudies-literatureChen She Fundamental Research Funds for the Central Universities of China105https://www.ebi.ac.uk/biostudies/studies/S-EPMC12839976biostudies-literatureUnknown28(1)Among corrosive environments, Cl^- is one of the most aggressive anions which can cause electrochemical corrosion and the resultant failures of alloys, and the increase in Cl^- concentration will further deteriorate the passive film in many conventional alloys. Here, we report single-phase Nb₂₅Mo₂₅Ta₂₅Ti₂₀W₅C<i>_x</i> (<i>x</i> = 0.1, 0.3, 0.8 at.%) refractory high-entropy alloys (RHEAs) with excellent corrosion resistance in high-concentration NaCl solutions. According to potentiodynamic polarization, electrochemical impedance spectroscopy, corroded morphology and the current-time results, the RHEAs demonstrate even better corrosion resistance with the increase in NaCl concentration to 23.5 wt.%, significEntropy (Basel, Switzerland)Sustainable High Corrosion Resistance in High-Concentration NaCl Solutions for Refractory High-Entropy Alloys with High Strength and Good Plasticity.PMC12839976PA2024GDSK0059Liu XLi CWang WChen SYue XfalseSustainable High Corrosion Resistance in High-Concentration NaCl Solutions for Refractory High-Entropy Alloys with High Strength and Good Plasticity.Among corrosive environments, Cl^- is one of the most aggressive anions which can cause electrochemical corrosion and the resultant failures of alloys, and the increase in Cl^- concentration will further deteriorate the passive film in many conventional alloys. Here, we report single-phase Nb₂₅Mo₂₅Ta₂₅Ti₂₀W₅C<i>_x</i> (<i>x</i> = 0.1, 0.3, 0.8 at.%) refractory high-entropy alloys (RHEAs) with excellent corrosion resistance in high-concentration NaCl solutions. According to potentiodynamic polarization, electrochemical impedance spectroscopy, corroded morphology and the current-time results, the RHEAs demonstrate even better corrosion resistance with the increase in NaCl concentration to 23.5 wt.%, signific2026-01-01T00:00:00Z2026 Jan2026-06-13T03:12:11.931Z2026-06-13T03:08:47.589ZS-EPMC128399764159401210.3390/e28010105