为解决La（Fe，Si）₁₃磁制冷材料在换热介质中的腐蚀问题，尝试用Ni元素部分替代Fe元素，并对替代前后LaFe_{11.832- x} Ni _x Si_1.4（x=0，0.1，0.2，0.3，质量分数，下同）合金的磁热性能及不同介质中的腐蚀行为进行了系统的研究。结果表明，当Ni含量小于0.2时，LaFe_{11.832- x} Ni _x Si_1.4可保持良好的磁热性能，其2 T磁场下磁熵变可达15.31 J/（kg·K）（x=0.1），14.00 J/（kg·K）（x=0.2），相对磁制冷能力分别为151.6，156.8 J/kg，且磁滞损耗明显降低。在去离子水中，LaFe_{11.832- x} Ni _x Si_1.4合金的腐蚀电流I _corr随Ni含量的增加由2.6159 μA/cm²降低至2.0863 μA/cm²。而复配缓蚀剂4 g/L BTA+1 g/L Na₂MoO₄·2H₂O中LaFe_{11.832- x} Ni _x Si_1.4合金最大缓蚀效率为77.06%，表现出较好的缓蚀效果。LaFe_{11.832- x} Ni _x Si_1.4（x≤0.2）合金配合4 g/L BTA+1 g/L Na₂MoO₄·2H₂O复配缓蚀剂可作为实用化的磁制冷机工质与介质的备选组合。

To solve the corrosion problem of La（Fe， Si）₁₃ magnetic refrigeration material in the heat exchange medium， an attempt is made to partially replace Fe element with Ni element. The magnetocaloric properties of LaFe_{11.832- x} Ni _x Si_1.4（x=0，0.1，0.2，0.3，mass fraction，the same below） alloys before and after the substitution， as well as the corrosion behavior in different media， are systematically studied. The results show that when the Ni content is less than 0.2， LaFe_{11.832- x} Ni _x Si_1.4 can maintain good magnetocaloric performance. Its magnetic entropy change under a 2 T magnetic field can reach 15.31 J/（kg·K）（x=0.1） and 14.00 J/（kg· K） （x=0.2）， and the relative magnetic cooling capacity is 151.6 J/kg and 156.8 J/kg， respectively， with significantly reduced magnetic hysteresis loss. In deionized water， the corrosion current I _corr of LaFe_{11.832- x} Ni _x Si_1.4 alloy decreases from 2.6159 μA/cm² to 2.0863 μA/cm² with increasing Ni content. The maximum corrosion inhibition efficiency of LaFe_{11.832- x} Ni _x Si_1.4 alloy in combined inhibitor of 4 g/L BTA+1 g/L Na₂MoO₄·2H₂O is 77.06%， showing a good corrosion inhibition effect. The LaFe_{11.832- x} Ni _x Si_1.4（x≤0.2） alloy with 4 g/L BTA+1 g/L Na₂MoO₄·2H₂O can be used as an alternative combination of working fluid and medium for practical magnetic refrigerators.