Tsau Chun-Huei, Hsiao Hui-Ping, Chien Tien-Yu
Institute of Nanomaterials, Chinese Culture University, Taipei 111, Taiwan.
Materials (Basel). 2023 Jul 8;16(14):4900. doi: 10.3390/ma16144900.
The effects of the concentration of NaCl solutions on the corrosion resistance of granular CoCrFeNiV and dendritic CrFeCoNiV high-entropy alloys were studied. The polarization behavior of CoCrFeNiV and CrFeCoNiV alloys in deaerated 0.5 M and 1 M sodium chloride solution at different temperatures was measured by a constant galvanostatic/potentiometric. Electrochemical impedance spectroscopy (EIS) was used to examine CoCrFeNiV CrFeCoNiV alloys in 0.5 M and 1 M NaCl solutions. The results indicated that the CoCrFeNiV alloy showed a better corrosion resistance than that of CrFeCoNiV alloy because the dendritic structure of CrFeCoNiV had too many σ/FCC interfaces. The critical pitting temperatures (CPTs) of the alloys under different applied potentials were also analyzed. All of the results proved that CrFeCoNiV alloy had better corrosion resistance in 0.5 M and 1 M NaCl solutions.
研究了NaCl溶液浓度对颗粒状CoCrFeNiV和树枝状CrFeCoNiV高熵合金耐蚀性的影响。通过恒电流/恒电位法测量了CoCrFeNiV和CrFeCoNiV合金在不同温度下的0.5 M和1 M脱气氯化钠溶液中的极化行为。采用电化学阻抗谱（EIS）研究了CoCrFeNiV和CrFeCoNiV合金在0.5 M和1 M NaCl溶液中的情况。结果表明，CoCrFeNiV合金比CrFeCoNiV合金具有更好的耐蚀性，因为CrFeCoNiV的树枝状结构有太多的σ/FCC界面。还分析了不同外加电位下合金的临界点蚀温度（CPT）。所有结果都证明，CrFeCoNiV合金在0.5 M和1 M NaCl溶液中具有更好的耐蚀性。
