The effects of W addition on the corrosion behaviors of FeCoNiCrMn high entropy alloy composites in 3.5 wt.%NaCl solution are investigated in this study. The X-ray diffraction and scanning electron microscopy suggest that the quantity of added W particles results in the increasing quantity of particles in the composites and large amount of cohesionless phases covering the matrix occur in the alloy with 1.0 molar ratio of W element. The trend of corrosion potential current density means that all W-added high entropy alloy composites have a better corrosion resistance referring to the base high entropy alloy composites and 0.8 molar ratio of W element into base generates a best corrosion resistance in the current work. The Electrochemical impedance spectra and compositional analysis of corroded surface of as-cast high entropy alloys demonstrate that W particles act as anode in the composites and Fe-Mn-Cr is as the cathode.

本研究研究了添加钨对FeCoNiCrMn高熵合金复合材料在3.5 wt％NaCl溶液中腐蚀行为的影响。X射线衍射和扫描电子显微镜表明，W颗粒的添加量导致复合材料中颗粒的数量增加，并且在W元素摩尔比为1.0的合金中出现了覆盖基体的大量无内聚相。腐蚀电位电流密度的趋势意味着，与基础高熵合金复合材料相比，所有添加W的高熵合金复合材料都具有更好的耐腐蚀性，并且在当前工作中W元素与碱的摩尔比为0.8时，具有最佳的耐腐蚀性。