High-entropy alloys are attractive structural materials for the design of apparatus for various chemical technologies due to their relative ease of production, corrosion resistance and high values of mechanical properties (hardness, strength). In the present work, the influence of aluminum and zirconium content on the corrosion resistance of Al(20−35)-Ni(5−15)-Co(15−30)-Cu(20−35)-Zr(5−40) high-entropy alloys was studied experimentally for the first time. Corrosion tests were performed in a 5 wt% NaCl aqueous solution during 1500 h at 298 K. It is established that the electronegative metals included in the alloy - Al and Zr are passivation components and with increasing their content in AlNiCoCuZr composition the corrosion rate in the studied conditions is decreased. It is shown that degradation of alloys occurs mainly as a result of nickel and cobalt hydroxide formation, the solubility of which is several orders of magnitude higher than that of aluminum hydroxide and zirconium hydroxide.

中文翻译：

---

Al和Zr含量对AlNiCoCuZr高熵合金在5 wt% NaCl溶液中腐蚀的影响


高熵合金由于其相对易于生产、耐腐蚀性和高机械性能（硬度、强度），对于各种化学技术的设备设计来说是有吸引力的结构材料。在本工作中，铝和锆含量对Al(20−35)-Ni(5−15)-Co(15−30)-Cu(20−35)-Zr(5−40)耐腐蚀性的影响）首次对高熵合金进行了实验研究。在 298 K 下，在 5 wt% NaCl 水溶液中进行了 1500 小时的腐蚀测试。结果表明，合金中包含的负电性金属 - Al 和 Zr 是钝化成分，并且随着 AlNiCoCuZr 成分中它们含量的增加，合金中的腐蚀速率增加。研究条件降低。结果表明，合金的降解主要是由于镍和氢氧化钴的形成而发生的，其溶解度比氢氧化铝和氢氧化锆高几个数量级。