In situ SR-XRD analysis of corrosion product formation during ‘pseudo-passivation’ of carbon steel in CO2-containing aqueous environments - IFPEN - IFP Energies nouvelles Accéder directement au contenu
Article Dans Une Revue Corrosion Science Année : 2023

In situ SR-XRD analysis of corrosion product formation during ‘pseudo-passivation’ of carbon steel in CO2-containing aqueous environments

Résumé

In situ Synchrotron Radiation X-ray Diffraction (SR-XRD) is employed to follow the evolution of corrosion products on X65 carbon steel in a CO 2-containing aqueous environment (80 • C, pH 6.3-7.3). A custom-designed flow cell is used to follow the real-time concomitant changes in electrochemical behaviour and corrosion product growth during stages of both natural and potentiodynamically driven 'pseudo-passivation'. We show that no detectable crystalline magnetite (Fe 3 O 4) phase forms during 'pseudo-passivation' across all conditions studied. Furthermore, the results suggest the significant ennoblement observed during 'pseudo-passivation' in these experiments can be strongly related to the accumulation of iron carbonate (FeCO 3) on the steel surface.

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Matériaux
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Dates et versions

hal-04289082 , version 1 (16-11-2023)

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Joshua Owen, Danny Burkle, Gaurav R. Joshi, Edoardo Basilico, Jean Kittel, et al.. In situ SR-XRD analysis of corrosion product formation during ‘pseudo-passivation’ of carbon steel in CO2-containing aqueous environments. Corrosion Science, 2023, 225, pp.111598. ⟨10.1016/j.corsci.2023.111598⟩. ⟨hal-04289082⟩
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