The effect of Mo content on the microstructure revolution and corrosion behavior of cast FeCoCrNiMo_xhigh-entropy alloys in chloride environments were investigated. Results indicate that FeCoCrNi and FeCoCrNiMo_0.1alloys are in single FCC solid solution. The precipitates form in FeCoCrNiMo_0.3 and increase in FeCoCrNiMo_0.6 alloys. Pitting occurs on FeCoCrNi and FeCoCrNiMo_0.1alloys while FeCoCrNiMo_0.3 and FeCoCrNiMo_0.6alloys suffer from preferential localized corrosion at the regions depleted in Cr and Mo. The higher Cr₂O₃/Cr(OH)₃ ratio and the incorporation of Mo oxides make the passive film more protective and the corrosion resistance of the FeCoCrNiMo_0.1alloy is thus enhanced. The correlation between microstructure and corrosion behavior and the corresponding corrosion mechanism were clarified.

研究了Mo含量对氯化物环境中铸造的FeCoCrNiMo _x高熵合金的显微组织旋转和腐蚀行为的影响。结果表明，FeCoCrNi和FeCoCrNiMo _0.1合金处于单一FCC固溶体中。在FeCoCrNiMo _0.3中形成沉淀，在FeCoCrNiMo _0.6合金中增加。FeCoCrNi和FeCoCrNiMo _0.1合金上出现点蚀，而FeCoCrNiMo _0.3和FeCoCrNiMo _0.6合金在Cr和Mo耗尽的区域遭受优先局部腐蚀。Cr ₂ O ₃ / Cr（OH）₃越高比率和Mo氧化物的掺入使钝化膜更具保护性，从而提高了FeCoCrNiMo _0.1合金的耐腐蚀性。阐明了微观组织与腐蚀行为之间的关系以及相应的腐蚀机理。