Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지

Determination of Chemical Compositions and Oxidation States for Corrosion Products in LiCl Molten Salts

  • Published : 2000.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The mechanism of corrosion behavior has to be understood clearly to select an optimum material for handling molten salts to be used in the oxide reduction process of PWR spent fuel. In this study, the oxidation states of corrosion products on the surface of Inconel 600 and 800H as well as their chemical compositions and structural informations were determined by using XPS, ICP-AES, AAS, EPMA and XRD after the corrosion experiment with lithium molten salts at 75$0^{\circ}C$ for 25 hours. Nickel and oxygen were detected from the corrosion products on the surface of Inconel plates and chromium was found to be dissolved out into lithium molten salts leaving cracks on the surface. The corrosion products were identified as metal oxides such as Fe$_2$O$_3$, Cr$_2$O$_3$, NiO, NiFe$_2$O$_4$and MnO by using XPS and XRD.

Keywords

References

  1. KAERI/TR-1229/99, 'Development of Advenced Spent Fuel Management Process' (1999)
  2. J. A. Geobel and F. S. Pettit and G. W. Goward, 'Mechanism for the hot corrosion of nickel-base alloys', 4, 261 (1973)
  3. Y. S. Zhang, J. Electrochem. Soc., 133, 655(1986) https://doi.org/10.1149/1.2108648
  4. N. Ariga, T. Shimada and K. Shomura, 'Iron-chromium-nickel alloy steel having superior corrosion resistance in chloride-containing molten salt', JP8041595 (1996)
  5. Tery Barr, 'Mordern ESCA, The principles and practice of X-ray photoelectron spectroscoty' p.20, CRC Press, Inc., Boca Raton(1994)