Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (Suppl): 101-105.doi: 10.3866/PKU.WHXB2014Ac18

• ARTICLE • Previous Articles     Next Articles

Analysis of Surface Oxidation Corrosion of Uranium Metal in Noble-Gas Sealed Environment

GUO Huan-Jun, LI Shi-Jun, ZHANG Rui, HUI Xin-Li   

  1. P. O. Box 150-11-24, Baoji 721013, Shaanxi Province, P. R. China
  • Published:2015-05-20
  • Contact: GUO Huan-Jun E-mail:guohuanjun099@163.com

Abstract:

Surface corrosion of uranium metal during storage for 10 years in an inert gas atmosphere was examined. The factors causing uranium metal surface oxidation, spontaneous combustion, and etch pit formation were investigated using X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The results show that the main factors are the iron concentration in the uranium, the long-term and sealed storage conditions, and chemical behaviors of intermediates in the storage environment. UO2 and U3O8 cause etch pits, and the hydrogenation reaction product UH3 combusts spontaneously on exposure to air.

Key words: Uranium, Impurity, Corrosion pit, UH3

MSC2000: 

  • O647