铅冷快堆作为第IV代核反应堆的推荐堆型，具有显著的先进性。然而，耐铅铋腐蚀结构材料一直是制约其 发展的重要因素。已有研究表明Fe37 Ni36 Cr10 Al17多主元合金具有良好的静态铅铋相容性。基于此，以Fe37 Ni36 Cr10 Al17合金 为对象，在含氧量为10-7%(质量分数)、流速为2m/s的550℃液态铅铋中暴露2000h以探究其动态腐蚀行为，为新型 含Al金属材料在铅冷快堆中的应用提供研究基础。结果表明，Al对氧化层的致密性和稳定性起决定性作用。当合金表 面生成富Al氧化层时，合金能够得到很好保护；当氧化层中Al含量较低或分布不均时，合金会发生明显的溶解腐蚀。 溶解腐蚀主要发生在FCC相中， 导致FCC相中的Ni大量流失， 并析出弥散的B2相。 相比于传统商用不锈钢， Fe37 Ni36 Cr10 Al17 合金的溶解腐蚀深度较浅，具有明显的应用优势。

As the recommended reactor type for fourth-generation nuclear reactors, lead-cooled fast reactors have made remarkable progress. However, lead-bismuth corrosion-resistant structural materials have always been an important factor restricting their development. Previous studies have shown that Fe37 Ni36 Cr10 Al17 multiprinciple component alloys have good static lead-bismuth compatibility. Therefore, with the Fe37 Ni36 Cr10 Al17 alloy as the object, the dynamic corrosion behavior of a 550 ℃ liquid lead-bismuth eutectic with an oxygen content of 10-7 wt.% and a flow rate of 2 m/s was explored, providing a research basis for the application of new Al-containing metallic materials in lead-cooled fast reactors. These results indicate that Al plays a decisive role in the oxide layer. When the alloy indicates the formation of an Al-rich oxide layer, the alloy can be well protected; when the Al content in the oxide layer is low or unevenly distributed, the Fe37 Ni36 Cr10 Al17 alloy undergoes significant dissolution corrosion. Dissolution corrosion mainly occurs in the FCC phase, causing a significant loss of Ni, a decrease in stability, and the precipitation of the dispersed B2 phase. Compared with traditional commercial stainless steel, the Fe37 Ni36 Cr10 Al17 alloy has a shallower dissolution corrosion depth and significant application advantages.