Hydrogen diffusion process in the oxides formed on Zirconium Alloys during corrosion in Pressurized Water Reactor Conditions - Archive ouverte HAL Access content directly
Journal Articles Corrosion Science Year : 2016

Hydrogen diffusion process in the oxides formed on Zirconium Alloys during corrosion in Pressurized Water Reactor Conditions

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Abstract

During the corrosion in primary water of zirconium alloys, a fraction of hydrogen from the water diffuses through the oxide into the alloy. To better understand the hydriding process, isotopic tracers and SIMS experiments were performed on oxides grown on Zircaloy-4 alloy under simulated primary water conditions. Results showed the oxide film in pre-transition is divided into two sub-layers, an external one, highly permeable to hydrogen and an inner protective one. Thermal Desorption Spectroscopy analyses revealed two interaction sites of hydrogen, located in each oxide sublayer. Apparent diffusion coefficients of hydrogen in both oxide sublayers were estimated with different methods.
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Dates and versions

cea-01465798 , version 1 (13-02-2017)

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Marc Tupin, Frantz Martin, Caroline Bisor, Romain Verlet, Philippe Bossis, et al.. Hydrogen diffusion process in the oxides formed on Zirconium Alloys during corrosion in Pressurized Water Reactor Conditions. Corrosion Science, 2016, 116, pp.1-13. ⟨10.1016/j.corsci.2016.10.027⟩. ⟨cea-01465798⟩
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