In Situ Proton Irradiation/Lead-Bismuth Eutectic Corrosion Synergistic Effect on Amorphous Fecraltimo Coatings

Abstract

Synergistic effects of simultaneous proton irradiation and lead-bismuth eutectic (LBE) corrosion on amorphous FeCrAlTiMo coating are investigated. Results show that irradiation can have positive effect on corrosion performance. Both the experimental and simulation results demonstrate that irradiation-induced annihilation of free volume reduces the diffusion kinetic, leading to the decelerated corrosion of the coating in LBE at 600 °C, which challenges the traditional wisdom that irradiation damage usually results in negative effects on corrosion. Finally, a novel mechanism of irradiation-decelerated corrosion is put forward, which provides a new idea for designing nuclear structural materials with better synergistic corrosion and irradiation resistance.

Keywords: Synergistic effect, Proton irradiation, Lead-bismuth eutectic, Decelerated corrosion