Recommended Citation
Xie, Yi, "Tellurium Corrosion of Type 304/304L Stainless Steel, Iron, Chromium, and Nickel in High-Temperature Liquid Sodium" (2023). Purdue University Libraries Open Access Publishing Fund. Paper 185.
http://dx.doi.org/10.3390/ma16206798
DOI
10.3390/ma16206798
Date of this Version
10-21-2023
Keywords
liquid sodium, tellurium attack, stainless steel, sodium-cooled nuclear reactor
Abstract
Investigating tellurium (Te) corrosion on structural materials is crucial for sodium-cooled fast reactors (SFRs) due to radionuclide presence and knowledge gaps. In this study, Type 304/304L stainless steel (SS304), chromium (Cr), iron (Fe), and nickel (Ni) samples were immersed in low-oxygen environments with Te in liquid sodium at 773 K for 30 days. At 10 ppm oxygen, SS304 showed multiple oxide layers, including a compact NaCrO2 interlayer and porous Na-Fe-Ni-O outer layers. Tellurium penetrated through the porous layers but was hindered by the NaCrO2 interlayer. At 0.01 ppm oxygen, Cr had no oxide layer, while Fe and Ni had unstable ones. Tellurium-induced pitting was deeper in Fe and Ni compared to Cr. Oxygen levels and Cr composition are critical factors affecting stable oxide compound layer formation and mitigating Te-induced pitting.
Comments
This is the publisher PDF of Xie, Y. Tellurium Corrosion of Type 304/304L Stainless Steel, Iron, Chromium, and Nickel in High-Temperature Liquid Sodium. Materials 2023, 16, 6798. This article is distributed under a CC-BY license, and is available at DOI: 10.3390/ma16206798.