An electrochemical and radiolytic study of the effects of H-2 on the corrosion of UO2-based materials

doi:10.1016/j.corsci.2021.109776

	An electrochemical and radiolytic study of the effects of H-2 on the corrosion of UO2-based materials
	Liu, Nazhen 1,2; King, Fraser 3; Noel, James J.1,4; Shoesmith, David W.1,4
	2021-11-01
发表期刊	CORROSION SCIENCE
ISSN	0010-938X
卷号	192 页码:9
通讯作者	Liu, Nazhen(liunazhen@qdio.ac.cn) ; Noel, James J.(jjnoel@uwo.ca)
摘要	The influence of gamma-radiation in the presence of dissolved hydrogen on the corrosion of uranium dioxide has been compared to the electrochemical behavior of uranium dioxide in aqueous chloride solutions. Hydrogen atoms, produced either electrochemically or by water radiolysis were shown to reduce U-V in the oxide leading to suppression of its corrosion. The removal of electrochemical polarization, and of hydrogen when gamma-radiation was present, allowed re-oxidation of the uranium dioxide accompanied by the reformation of hydrogen. These results are consistent with published studies which show the corrosion of spent nuclear fuel can be suppressed in the presence of hydrogen. H-2 effect in suppressing the corrosion of UO2-based materials without catalysis of noble metal particles is studied by producing H radicals electrochemically and radiolytically. Reactive H radicals produced by H2O reduction at cathodic potentials, lead to the reduction of U-V states which are present due either to the Dy-III doping or the non-stoichiometry within the UO2 based materials. When the cathodic potential is switched to open circuit, the relaxation of E-CORR (corrosion potential) indicates that the electrochemically reduced surface is unstable. The combination of gamma-irradiation and H-2 can also lead to the reduction of UO2. In the absence of dissolved H-2, a similar relaxation of E-CORR indicates that reactive H radicals produced electrochemically or radiolytically are responsible for the reduction of the UO2 matrix.
关键词	Uranium dioxide Spent nuclear fuel H radicals gamma-irradiation Corrosion
DOI	10.1016/j.corsci.2021.109776
收录类别	SCI
语种	英语
资助项目	Natural Sciences and Engineering Research Council (NSERC, Ottawa) ; Nuclear Waste Management Organization (NWMO, Toronto) ; Swedish Nuclear Fuel and Waste Management Company, Sweden (SKB, Solna)
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000701867800002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/176569
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Liu, Nazhen; Noel, James J.
作者单位	1.Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Integr Corros Consulting Ltd, Columbia, BC V9T 1K2, Canada 4.Univ Western Ontario, Surface Sci Western, London, ON N6G 0J3, Canada
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Liu, Nazhen,King, Fraser,Noel, James J.,et al. An electrochemical and radiolytic study of the effects of H-2 on the corrosion of UO2-based materials[J]. CORROSION SCIENCE,2021,192:9.
APA	Liu, Nazhen,King, Fraser,Noel, James J.,&Shoesmith, David W..(2021).An electrochemical and radiolytic study of the effects of H-2 on the corrosion of UO2-based materials.CORROSION SCIENCE,192,9.
MLA	Liu, Nazhen,et al."An electrochemical and radiolytic study of the effects of H-2 on the corrosion of UO2-based materials".CORROSION SCIENCE 192(2021):9.

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