s'authentifier
version française rss feed
HAL : in2p3-00748578, version 1

Fiche concise  Récupérer au format
Alpha localized radiolysis and corrosion mechanisms at the iron/water interface: Role of molecular species
Vandenborre J., Crumière F., Blain G., Essehli R., Humbert B. et al
Journal of Nuclear Materials 433 (2013) 124-131 - http://hal.in2p3.fr/in2p3-00748578
Chimie/Radiochimie
Alpha localized radiolysis and corrosion mechanisms at the iron/water interface: Role of molecular species
J. Vandenborre ()1, F. Crumière1, G. Blain1, R. Essehli1, B. Humbert2, M. Fattahi1
1 :  SUBATECH - Laboratoire SUBATECH Nantes
http://www-subatech.in2p3.fr/
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
France
2 :  IMN - Institut des matériaux Jean Rouxel
http://www.cnrs-imn.fr/
CNRS : UMR6502 – Université de Nantes
Campus Sciences 2 Rue de la Houssinière - BP 32229 44322 NANTES CEDEX 3
France
This paper is devoted to the iron corrosion phenomena induced by the α (4He2+) water radiolysis species studied in conjunction with the production/consumption of H2 at the solid/solution interface. On one hand, the solid surface is characterized during the 4He2+ ions irradiation by in situ Raman spectroscopy; on another hand, the H2 gas produced by the water radiolysis is monitored by ex situ gas measurements. The 4He2+ ions irradiation experiments are provided either by the CEMHTI (E = 5.0 MeV) either by the ARRONAX (E = 64.7 MeV) cyclotron facilities. The iron corrosion occurs only under irradiation and can be slowed down by H2 reductive atmosphere. Pure iron and carbon steel solids are studied in order to show two distinct behaviors of these surfaces vs. the 4He2+ ions water irradiation: the corrosion products identified are the magnetite phase (Fe(II)Fe(III)2O4) correlated to an H2 consumption for pure iron and the lepidocrocite phase (γ-Fe(III)OOH) correlated to an H2 production for carbon steel sample. This paper underlined the correlation between the iron corrosion products formation onto the solid surface and the H2 production/consumption mechanisms. H2O2 species is considered as the single water radiolytic species involved into the corrosion reaction at the solid surface with an essential role in the oxidation reaction of the iron surface. We propose to bring some light to these mechanisms, in particular the H2 and H2O2 roles, by the in situ Raman spectroscopy during and after the 4He2+ ions beam irradiation. This in situ experiment avoids the evolution of the solid surface, in particular phases which are reactive to the oxidation processing.

Articles dans des revues avec comité de lecture
2013
Journal of Nuclear Materials (J. Nucl. Mater.)
Publisher Elsevier
ISSN 0022-3115 (eISSN : 0022-3115)
433
124-131

SUBATECH-Radiochimie
Liste des fichiers attachés à ce document : 
PDF
Vandenborre-Reviewed.pdf(571.1 KB)