铁辐照腐蚀中氢的来源
Origin of the hydrogen involved in iron corrosion under irradiation
摘要：
从长期地质贮存的角度考虑，高放废物将采用低碳钢容器进行外包装。在这种情况下，我们研究了水中溶解的氧对铁腐蚀的影响。因此，浸出实验进行脱气D $\_2$ O和充气H $\_2$ O和质子辐照下的铁腐蚀的动力学研究导致在两个不同的溶解氧浓度的水介质中。浸出实验强调了溶解氧在氧化还原反应中的主要作用，只要铁与水接触，氧化还原反应就发生。但铁在辐照下的腐蚀动力学研究表明，氧化还原反应和水辐解产生的自由基物种引起的腐蚀速率之间的平衡。此外，为了检查在原子%浓度范围内氢是否从空气/Fe界面扩散通过箔，在氩气中进行辐照实验。证明了在原子百分比的浓度水平下不发生氢渗透。
英文摘要：
In the perspective of long term geological storage, high level nuclear wastes will be overpacked in low carbon steel containers. In that context, we have studied the influence of oxygen dissolved in water on iron corrosion. Therefore, leaching experiments were performed in desaerated D$\_2$O and in aerated H$\_2$O and a kinetic study of iron corrosion under proton irradiation was lead in aqueous media with two different dissolved oxygen concentrations. The leaching experiments underline the major role of dissolved oxygen in oxydoreduction reactions which take place as far as iron is in contact with water. But the kinetic study of iron corrosion under irradiation put in evidence the balance between the oxydoreduction reactions and the corrosion rate induced by radicals species generated by water radiolysis. In addition, to check if, in the atomic % concentration range, hydrogen diffuse from the air/Fe interface through the foil an irradiation experiment was performed in argon. It proved that no hydrogen permeation occurs at a concentration level of the atomic percent.
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