Corrosion mechanisms of 316L stainless steel in supercritical water: The significant effect of work hardening induced by surface finishes

Article dans une revue avec comité de lecture
Auteur
PAYET, Mickaël
234539 CEA Cadarache
300351 Conservatoire National des Arts et Métiers [Cnam] [Cnam]
92792 CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
MARCHETTI, Loïc
92792 CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
300351 Conservatoire National des Arts et Métiers [Cnam] [Cnam]
TABARANT, Michel
92792 CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
JOMARD, François
81173 Université de Versailles Saint-Quentin-en-Yvelines [UVSQ]
CHEVALIER, Jean Pierre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
300351 Conservatoire National des Arts et Métiers [Cnam] [Cnam]

URI
http://hdl.handle.net/10985/17917
DOI
10.1016/j.corsci.2019.05.014
Date
2019
Journal
Corrosion Science

Résumé

The oxidation of 316 L stainless steel in hydrogenated supercritical water at 600 °C is strongly dependent on the effects of work hardening induced by surface finishes. The oxide scale formed under these conditions is always double-layered with an external layer of Fe-rich oxides. However, when a hardening threshold is reached, a switch in oxidation mechanisms leads to a considerable thinning of the oxide scale. This thinning results from the formation of a Cr-rich internal oxide layer that acts as a diffusion barrier against ionic species responsible for its growth but also against Fe cations implied in the external layer growth.

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2019-02-15
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