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<p>Molybdenum (Mo) and its alloys are critical candidate materials for next-generation nuclear energy systems due to their superior high-temperature strength and neutronic properties. However, their engineering applications are severely limited by environmental degradation under combined high-temperature, irradiation, and corrosive conditions. This review systematically examines the corrosion behavior and degradation mechanisms of Mo alloys in representative service environments, including aqueous solutions, high-temperature gases/steam, and liquid metals/molten salts. Special emphasis is placed on the synergistic effects of irradiation-induced defects and chemical corrosion, which significantly accelerate material failure. Current challenges regarding oxide film instability and microstructural evolution are analysed. Finally, the paper outlines future research directions, highlighting the need to elucidate multi-scale irradiation-corrosion coupling mechanisms and develop advanced adaptive protective systems to ensure the long-term reliability of Mo-based materials in extreme nuclear environments.</p>

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Corrosion and Protection of Molybdenum Alloys for Advanced Nuclear Reactors: A Review

  • 期刊论文

  • 发表日期：

    2026年5月7日

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  • Tuo Jingyi,
  • Luo Can,
  • Gao Wenjun,
  • Pan Yujun,
  • Huang Xuefei,
  • Wang Hui

摘要

Molybdenum (Mo) and its alloys are critical candidate materials for next-generation nuclear energy systems due to their superior high-temperature strength and neutronic properties. However, their engineering applications are severely limited by environmental degradation under combined high-temperature, irradiation, and corrosive conditions. This review systematically examines the corrosion behavior and degradation mechanisms of Mo alloys in representative service environments, including aqueous solutions, high-temperature gases/steam, and liquid metals/molten salts. Special emphasis is placed on the synergistic effects of irradiation-induced defects and chemical corrosion, which significantly accelerate material failure. Current challenges regarding oxide film instability and microstructural evolution are analysed. Finally, the paper outlines future research directions, highlighting the need to elucidate multi-scale irradiation-corrosion coupling mechanisms and develop advanced adaptive protective systems to ensure the long-term reliability of Mo-based materials in extreme nuclear environments.