Abstract A CoCrFeMnNi high-entropy alloy (HEA) was fabricated by additive manufacturing using selective laser melting (SLM). The corrosion behavior of the SLM-produced and as-cast CoCrFeMnNi HEA in 3.5 wt.% NaCl solution was comparatively analyzed. Compared to the as-cast HEA, more uniform composition and finer grains were observed in the SLMed HEA. The passive film formed on the SLMed HEA had a more stable and stronger protective property. The corrosion current density of the SLMed CoCrFeMnNi HEA dropped by 58 % compared to that of the as-cast HEA, indicating that the SLMed HEA had better corrosion resistance than that of the as-cast alloy.

中文翻译：

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增材制造CoCrFeMnNi高熵合金的耐蚀性增强

摘要 采用选择性激光熔化 (SLM) 的增材制造方法制备了 CoCrFeMnNi 高熵合金 (HEA)。比较分析了 SLM 生产和铸态 CoCrFeMnNi HEA 在 3.5 wt.% NaCl 溶液中的腐蚀行为。与铸态 HEA 相比，在 SLMed HEA 中观察到更均匀的成分和更细的晶粒。SLMed HEA 上形成的钝化膜具有更稳定和更强的保护性能。与铸态 HEA 相比，SLMed CoCrFeMnNi HEA 的腐蚀电流密度下降了 58%，表明 SLMed HEA 的耐腐蚀性能优于铸态合金。