The demand of accident tolerant fuel cladding materials provides a momentum for the development of FeCrAl alloys. To prove its potential, this work studied the corrosion behavior of FeCrAl alloys in H₃BO₃- and LiOH- containing water at 360 °C and 18.5 MPa for 500 h. XPS, XRD, SEM, Raman and AFM analyses were employed to identify oxide films, and the early corrosion mechanism of FeCrAl was discussed. Duplex oxide films were found on the surface of FeCrAl. The inner layer was Fe-Cr-Al spinel, and the outer crystals was dominantly composed of Fe₂O₃, accompanied by Fe₃O₄, FeCr₂O₄, NiFe₂O₄ and Li₂Fe₃O₄. Similar to FeCrAl, Zircaloy-4 showed negligible weight change. However, its surface corrosion was more severe, and the oxides formed were mainly ZrO₂ and Zr₃O_1-X. Li₆Zr₂O₇ and other sub oxides were also observed.

对容灾燃料包壳材料的需求为 FeCrAl 合金的发展提供了动力。为了证明其潜力，这项工作研究了 FeCrAl 合金在360 °C 和 18.5 MPa 的H ₃ BO ₃ - 和 LiOH- 水中的腐蚀行为500 小时。采用 XPS、XRD、SEM、拉曼和 AFM 分析识别氧化膜，并讨论了 FeCrAl 的早期腐蚀机制。在 FeCrAl 表面发现了双相氧化膜。内层为Fe-Cr-Al尖晶石，外层晶体以Fe ₂ O _{3 为主}，辅以Fe ₃ O ₄、FeCr ₂ O ₄、NiFe ₂ O ₄和Li ₂ Fe ₃ O ₄。与 FeCrAl 类似，Zircaloy-4 的重量变化可以忽略不计。但其表面腐蚀较严重，形成的氧化物主要是ZrO ₂和Zr ₃ O _1-X。还观察到Li ₆ Zr ₂ O ₇和其他亚氧化物。