Uniform corrosion behavior of FeCrAl alloys in borated and lithiated high temperature water

• DOI: 10.1016/j.jmst.2020.07.026
• Publication Date: 2020-09-14T05:40:37Z
• Authors: Fangqiang Ning; Xiang Wang; Ying Yang; Jibo Tan; Ziyu Zhang; Dan Jia; Xinqiang Wu; En-Hou Han
• Keywords: High-Temperature Corrosion

Abstract The uniform corrosion behavior of model FeCrAl alloys as well as commercial Zircaloy-4 as reference material were investigated in 360 °C borated and lithiated water. The results reveal that FeCrAl alloys exhibited better corrosion resistance than Zircaloy-4. It is found that the oxide films formed on the FeCrAl alloys are composed of outer Fe3O4 layer, inner layer consisting of compact spinel layer and porous spinel layer, and transition layer containing Al-Cr-rich oxides and matrix enriched with Fe°. The spinel oxides in the inner layer are FeFe2-x-y-zCrxAlyMozO4. The corrosion mechanism of FeCrAl alloys in high temperature water is discussed.