Improving the corrosion resistance of FeCrAl alloy in high temperature hydrogenated water through gaseous pre-oxidation

FeCrAl alloy, a promising candidate for accident tolerance fuel (ATF) cladding, has relatively low resistance to general corrosion in high temperature water. To improve the corrosion resistance, a continuous Al2O3 2 O 3 layer was formed on the surface of FeCrAl alloy through gaseous pre-oxidation. It was found that such treatment can significantly improve its corrosion resistance in high temperature hydrogenated water. The thickness of inner oxide layer after exposure to 320 degrees C hydrogenated water for 950 h was reduced by similar to 40%. In addition, the size and density of outer oxide particles were also decreased. However, the Al2O3 2 O 3 film pre-formed on FeCrAl alloy had poor stability in high temperature water and its long-term effect needs to be further evaluated. (c) 2024 The Author(s). Published by Elsevier B.V. on behalf of Institute of Metal Research, Chinese Academy of Sciences. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )