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Effet de la radiolyse sur les systèmes de corrosion anoxiques à très long terme des alliages ferreux

Hugues Badet 1
1 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : In France, for nuclear waste management, it is planned to build a storage device with a barrier system composed of steel container. Corrosion is evaluated for the safety of anoxic storage over the long term. With radiation, water radiolysis generates oxidizing and reducing species that can change the corrosion. Three aspects are developed in this thesis. The first concerns iron coupon samples experimented in carbonate deaerated water and subjected to gamma irradiation. It is shown that irradiation can increase corrosion rates within the parameters of dose. Identified crystalline phases are little changed with irradiation. Solution chemistry shows a decrease in pH with dose related to iron. Organic species are identified. The second axis is archaeological analogues irradiation with an old corrosion products layer. Structural analysis verified the phase stability with radiolysis, only the newly formed products changes. The third axis is a kinetic simulation approach. It checks the pH drop under irradiation. Taken together, these results allow us to provide new data for the anoxic corrosion under irradiation.
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Submitted on : Tuesday, February 18, 2014 - 5:15:25 PM
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  • HAL Id : tel-00945974, version 1


Hugues Badet. Effet de la radiolyse sur les systèmes de corrosion anoxiques à très long terme des alliages ferreux. Matériaux. Université Pierre et Marie Curie - Paris VI, 2013. Français. ⟨tel-00945974⟩



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