Corrosion behaviors of ODS-FeCrAl in oxygen-saturated lead-bismuth eutectic at 550°C: Effects of grain boundaries and minor elements
Source abstract
Abstract
Long-term corrosion behavior of ODS-FeCrAl tube was investigated in oxygen-saturated static liquid lead-bismuth eutectic (LBE) at 550 °C. Different densities of sub-grain boundaries (sub-GBs) lead to different corrosion behaviors on the inside and outside surfaces of the tube. The oxide film formed on the inside surface consists of Fe 3O 4, Fe-Cr-Al spinel and Al 2O 3, and on the outside surface consists of Fe-Cr-Al spinel rich in Cr&Al and Al 2O 3. Excessively high density of sub-GBs accelerates the oxidation rate. The precipitation of W&Ti promotes the formation of Cr-rich and Al-rich oxides. The corrosion mechanism of ODS-FeCrAl in liquid LBE is discussed.
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OpenAlex topics: Nuclear Materials and Properties · Nuclear reactor physics and engineering · Nuclear materials and radiation effects
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