2000, Volume 2, Issue 12
Strategic Study of CAE >> 2000, Volume 2, Issue 12
Progress in the Research of Surface Corrosion Resistance of Uranium and Plutonium Metals
1. China Academy of Engineering Physics, Mianyang 621900, China
2. Institute of Atomic and Molecular Physics , Sichuan University, Chengdu 610065, China
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Abstract
It has been received considerable attention for surface corrosion resistance of uranium and plutonium metals. This paper is dedicated to the review of progress in the research above field in the laboratory. The surface chemical behavior and compatibility of uranium metal and U3O8 in the atmospheres of CO, CO2，H2 have been systematically studied with X-ray photoelectron spectroscopy (XPS) and gas chromatography (GC). While uranium and plutonium placed in CO atmosphere the oxidation rate of uranium was studied gravimetrically with a microbalance, and the charges of gase phase components was detected by quadruple mass spectrometer. The molecular structure, potential energy function, the corresponding spectroscopic data, thermodynamic and dynamic data of uranium and plutonium metals and compounds were systematically studied using the MP2 (the HF calculation followed by a second-order Moller - Plesset correlation) of Gaussian 94W and the RECP (relativistic effective core potential). The surface chemistry of metals were studied also by thermodynamic calculations in reducing atmospheres. The investigation indicates the metals have resistance to further oxidation corrosion in the atmosphere of CO.
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