Experimental Study on Oxidative and Electrochemical Corrosion of Uranium Surfac e Treated With Supercritical Carbon Dioxide

The corrosion resistance of uranium surface treated w ith supercritical carbon dioxide(SCCO2) is studied by mass gain and electroche mical methods. The oxidation kinetics curves (Δmt) of uranium surface tre ated with SCCO2 is obtained at 60 ℃, 70% RH condition. The results show that the corrosion resistant of treated uranium in the researched pressure, time an d temperature region is improved. The electrochemical corrosion resistance of tr eated uranium in the solution with the ω(Cl-)=50 μg/g is also studied by electrochemical method. The result indicates that the electrochemical corrosion resistance of uranium surface is enhanced. It can be expected that the existenc e of the uranium carbide in the reaction products may be beneficial to improving of corrosion resistance for uranium surface.