Mechanism of corrosion of zirconium hydride and impact of precipitated hydrides on the Zircaloy-4 corrosion behaviour

被引：31
|
作者：
Tupin, M. [1 ]
Bisor, C. [1 ]
Bossis, P. [1 ]
Chene, J. [2 ]
Bechade, J. L. [3 ]
Jomard, F. [4 ]
机构：
[1] CEA, DEN, Serv Etud Mat Irradies, F-91191 Gif Sur Yvette, France
[2] CEA Saclay, CEA, DEN, Serv Corros & Comprtement Mat Leur Environm, F-91191 Gif Sur Yvette, France
[3] CEA, DEN, Serv Rech Met Appl, F-91191 Gif Sur Yvette, France
[4] Univ Versailles St Quentin, CNRS, UMR 8635, GEMaC, F-92195 Meudon, France
来源：
CORROSION SCIENCE | 2015年 / 98卷
关键词：
Zirconium; Reactor conditions; Hydrogen absorption; SIMS; TRANSMISSION ELECTRON-MICROSCOPY; PRESSURIZED-WATER REACTORS; SYNCHROTRON-RADIATION; OXIDE-FILMS; ZR ALLOYS; OXIDATION; TEMPERATURE; HYDROGEN; PRETRANSITION; TRANSPORT;
D O I：
10.1016/j.corsci.2015.05.058
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In Pressurized Water Reactors, zirconium hydrides precipitate in the matrix and could increase the oxidation rate of the claddings. To understand their effect, corrosion tests, TEM and mu-XRD analyses have been performed. This work showed that the oxidation rate and the oxygen diffusion coefficient in the oxide formed on massive hydride are much greater than those of Zircaloy-4. Moreover, oxide characterizations indicated an additional phase indexed as the sub-oxide Zr3O between the oxide film and the massive hydride. Finally, the hydrogen of the hydrides is not incorporated in the oxide during the corrosion process. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：478 / 493
页数：16
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