Abstract
• A comparative investigation on two F/M steels and two austenitic steels exposed to LBE and Pb 83 Mg 17 was conducted. • High temperature Pb-Mg results in slight dissolution corrosion in F/M steels and strong dissolution corrosion in austenitic steels. High temperature LBE causes oxidation in all structural steels. • Pb-Mg should be carefully considered if it will be deployed in future LFRs. Lead and its alloys are commonly used as coolant and liquid spallation neutron targets for advanced nuclear reactors and ADS systems. Pb-Mg alloy may be a potential coolant and maintain an acceptable corrosion rate without additional oxygen control in comparison with LBE. A comparative study on corrosion behavior of two F/M steels (SIMP, T91) and two austenitic steels (316L, 15-15Ti) in liquid Pb-Mg and LBE at 550°C for 1000h has been studied in this work. In Pb-Mg, F/M steels show slight dissolution corrosion and austenitic steels show severe dissolution corrosion. In LBE, all steels form oxide layers and a three-layer structure is observed in F/M steels.
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