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Investigation of steel corrosion in MX80 bentonite at 120°C

Abstract : Corrosion experiments were performed on two metallic substrates, a ferritic–pearlitic steel (P285NH) and a ferritic one (Armco), in silicate environment during 30 days at 120°C. Corrosion products were characterized in terms of morphology (scanning electron microscope and transmission electron microscopy), composition (energydispersive X-ray spectroscopy) and structure (µ-Raman, selected area electron diffraction, X-ray absorption near edge structure). Results show a nanometric inner layer made of compact and adherent nanocrystallized magnetite with, locally a thickness up to several micrometers due to the metal microstructure. An outer layer of Fe-rich phyllosilicate, smectite and serpentine, more porous than the inner one and poorly adherent is observed around both the samples.
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Submitted on : Monday, September 7, 2020 - 8:16:49 AM
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Hélène Lotz, Charly Carrière, Christian Bataillon, Emmanuel Gardes, Isabelle Monnet, et al.. Investigation of steel corrosion in MX80 bentonite at 120°C. Materials and Corrosion / Werkstoffe und Korrosion, Wiley-VCH Verlag, In press, ⟨10.1002/maco.202011777⟩. ⟨cea-02931494⟩



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