In this study, we reviewed our recent work on the general corrosion of carbon steel (P355QL2) overpack material for the isolation of high‐level nuclear waste in Belgium's supercontainer concept. By using electrochemical impedance spectroscopy and by optimizing the mixed potential model, which incorporates quantum mechanical tunneling of charge carriers across the barrier layer to describe the kinetics of the partial cathodic process, we evaluated all parameters in the model as a function of independent variables such as voltage, temperature, and pH. By delineating the partial anodic and cathodic processes, we found that the corrosion rate (CR) is independent of voltage over the voltage range from 0.2 to −1.0 V_SHE, which is predicted to be experienced in the repository. Furthermore, the CR is found to increase strongly with decreasing pH and increasing temperature.

中文翻译：

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碳钢在合成混凝土孔隙溶液中的一般腐蚀

在这项研究中，我们回顾了我们最近在比利时超级容器概念中有关隔离高级别核废料的碳钢（P355QL2）外包装材料的一般腐蚀工作。通过使用电化学阻抗谱和优化混合电势模型，该模型结合了跨势垒层的电荷载流子的量子机械隧穿来描述部分阴极过程的动力学，我们根据独立变量（例如，电压，温度和pH值。通过描绘部分阳极和阴极过程，我们发现在0.2至-1.0 V _SHE的电压范围内，腐蚀速率（CR）与电压无关，预计在存储库中会遇到。此外，发现CR随着pH降低和温度升高而强烈增加。