THE ELECTROCHEMICAL-BEHAVIOR OF TRITIUM-CONTAINING STAINLESS-STEEL IN ALKALINE-MEDIUM

被引:5
作者
BELLANGER, G [1 ]
LAVIRON, E [1 ]
机构
[1] FAC SCI DIJON,CNRS,URA 33,SYNTH & ELECTROSYNTH ORGANOMET LAB,F-21000 DIJON,FRANCE
关键词
D O I
10.1016/0022-3115(92)90415-H
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The electrochemical behavior of 304L stainless steel sheets was studied by cyclic voltammetry in 0.1M NaOH. The hydrogen produced by electrolysis at values more negative than -1.6 V diffuses into the electrode; at more positive potentials, it diffuses back towards the surface, where it is reoxidized. Application of a potential step from -1.6 to -0.3 V produces a current which obeys the semi-infinite diffusion equations. Sheets contaminated by tritium were studied on the basis of the above results. At -0.3 V, the oxide layer is not destroyed; the tritium which it contains is oxidized and passes rapidly into the solution, smaller amounts, due to the tritium diffusing from the bulk of the metal, are subsequently oxidized. At -1.3 V, essentially the same phenomenon is observed, except that the oxide layer is destroyed. At -1.6 V, penetration of hydrogen occurs concomitantly to the oxidation of tritium. Applications to the decontamination of tritium containing steel are discussed.
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页码:14 / 19
页数:6
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