Decelerated lead-bismuth eutectic corrosion of FeCrAlTiMo coating by in situ proton irradiation

J Yang and JJ Yang, INTERMETALLICS, 184, 108849 (2025).

DOI: 10.1016/j.intermet.2025.108849

Synergistic effect of the simultaneous proton irradiation and lead- bismuth eutectic (LBE) corrosion on the amorphous FeCrAlTiMo coatings was investigated. Results displayed that proton irradiation had a positive effect on LBE corrosion resistance of the coating. The experimental and simulation results demonstrated that irradiation- induced annihilation of the free volume reduced the diffusion kinetic and lead to slower corrosion rate at 600 degrees C, which challenged the traditional wisdom that irradiation damage resulted in negative effect on materials corrosion. Finally, a novel mechanism of irradiation- decelerated corrosion was proposed, which provided a new approach for designing nuclear-structural materials with better corrosion and irradiation resistance.

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