原位、实时监测 BFS:OPC 水硬灰浆中的铀。第 1 部分：水蒸气中的腐蚀。
In-situ, time resolved monitoring of uranium in BFS:OPC grout. Part 1: Corrosion in water vapour.
机构信息
Interface Analysis Centre, H. H. Wills Physics Laboratory, University of Bristol, Bristol, UK.
Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, London, SW7 2AZ, UK.
出版信息
Sci Rep. 2017 Aug 11;7(1):7999. doi: 10.1038/s41598-017-08601-x.
Uranium encapsulated in grout was exposed to water vapour for extended periods of time. Through synchrotron x-ray powder diffraction and tomography measurements, uranium dioxide was determined the dominant corrosion product over a 50-week time period. The oxide growth rate initiated rapidly, with rates comparable to the U + HO reaction. Over time, the reaction rate decreased and eventually plateaued to a rate similar to the U + HO + O reaction. This behaviour was not attributed to oxygen ingress, but instead the decreasing permeability of the grout, limiting oxidising species access to the metal surface.
水合铀被包裹在灌浆材料中，暴露于水蒸气中很长一段时间。通过同步加速器 X 射线粉末衍射和断层扫描测量，在 50 周的时间内，二氧化铀被确定为主要的腐蚀产物。氧化物的生长速率迅速启动，与 U+HO 反应相当。随着时间的推移，反应速率下降，最终稳定在类似于 U+HO+O 反应的速率。这种行为不是由于氧气的进入，而是灌浆材料的渗透率降低，限制了氧化物种到达金属表面。
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