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Premières étapes d’oxydation d’un acier inoxydable austénitique et influence sur la passivation

Abstract : The aim of this research proposal is to understand the role in the corrosion initiation resistance of the chemical and structural heterogeneities created in the passivating oxide by the oxidation/passivation mechanisms of Cr-containing alloy surfaces. This will be achieved using a UHV system enabling XPS and STM monitoring of oxide growth during and after oxygen exposure and direct transfer without air exposure to an argon-filled glove box equipped with an electrochemical cell for precise control of exposure to aggressive aqueous electrolytes. The aqueous corrosive environments in controlled aggressive conditions (pH, electrochemical potential, chloride concentration) can results the surface modifications (chemical and nanostructural) will be analyzed by XPS and STM. Passive film growth and chromium enrichment will be analyzed in situ by XPS and by STM so as to understand the effect of the oxidation parameters on the local behaviour.
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  • HAL Id : tel-03204054, version 1

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Li Ma. Premières étapes d’oxydation d’un acier inoxydable austénitique et influence sur la passivation. Autre. Université Paris sciences et lettres, 2019. Français. ⟨NNT : 2019PSLEC034⟩. ⟨tel-03204054⟩

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