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<p>Development of the materials with high anti-corrosion and good tribological properties in molten salt is crucial for the mechanical components used in nuclear reactor. In this paper, the corrosion and tribological behaviors of Fe<sub>3</sub>Al intermetallic in FLiNaK molten salt are studied. The results show that the weight loss rate of the alloy in FLiNaK molten salt at 750&#xa0;°C is low and in the range of 0.05-0.12&#xa0;mg/cm<sup>2</sup> before 40&#xa0;h, due to the formation of oxide protective layer. But the weight loss rate rapidly increases rapidly from 0.12&#xa0;mg/cm<sup>2</sup> at 40&#xa0;h to 2.41&#xa0;mg/cm<sup>2</sup> at 140&#xa0;h, owing to the dissolution of Fe and Cr elements in the molten salt. The average friction coefficient and wear rate of the alloy mating with Inconel 625 balls are 0.33 and 8.9 × 10<sup>−5</sup> mm<sup>3</sup>/Nm, which are higher than mating with SiC ball, namely 0.11 and 3.4 × 10<sup>−5</sup> mm<sup>3</sup>/Nm.</p>

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Corrosion and Tribological Behaviors of Fe-28Al-5Cr Intermetallics in Molten FLiNaK Salt

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • Rongzhen Xiao,
  • Siqi Zhang,
  • Jun Cheng,
  • Jie Guo,
  • Juanjuan Chen,
  • Hui Tan,
  • Shengyu Zhu,
  • Jun Yang

摘要

Development of the materials with high anti-corrosion and good tribological properties in molten salt is crucial for the mechanical components used in nuclear reactor. In this paper, the corrosion and tribological behaviors of Fe3Al intermetallic in FLiNaK molten salt are studied. The results show that the weight loss rate of the alloy in FLiNaK molten salt at 750 °C is low and in the range of 0.05-0.12 mg/cm2 before 40 h, due to the formation of oxide protective layer. But the weight loss rate rapidly increases rapidly from 0.12 mg/cm2 at 40 h to 2.41 mg/cm2 at 140 h, owing to the dissolution of Fe and Cr elements in the molten salt. The average friction coefficient and wear rate of the alloy mating with Inconel 625 balls are 0.33 and 8.9 × 10−5 mm3/Nm, which are higher than mating with SiC ball, namely 0.11 and 3.4 × 10−5 mm3/Nm.