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Mercier, Dimitri
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Topics
Publications (19/19 displayed)
- 2024Hydroxyl transport mechanisms upon passivation of Cr-Fe-Co-Ni-Mo multi-principal element alloy surfaces investigated by isotopic labellingcitations
- 2023Effects of Chloride Ions on Passive Oxide Films Formed on Cr-Fe-Co-Ni(-Mo) Multi-Principal Element Alloy Surfacescitations
- 2023Impact of microbial activity on the formation of a protective layer on 5083 aluminium alloy in marine environment
- 2023XPS study of the thermal stability of passivated NiCrFeCoMo multi‐principal element alloy surfacescitations
- 2023XPS study of the thermal stability of passivated NiCrFeCoMo multi‐principal element alloy surfacescitations
- 2023Early-stage surface oxidation of the equiatomic CoCrFeMnNi high entropy alloy studied in situ by XPScitations
- 2023Advanced characterization of biomineralization layer formed on Al-Mg alloy in marine environment
- 2023Mechanism of Corrosion of Cast Aluminum-Silicon Alloys in Seawater. Part 2: Characterization and Field Testing of Sol-Gel-Coated Alloys in the Adriatic Seacitations
- 2023Origin of enhanced passivity of Cr–Fe–Co–Ni–Mo multi-principal element alloy surfacescitations
- 2023Effect of surface preparation by high-temperature hydrogen annealing on the passivation of Ni-20 at.% Cr alloy in sulfuric acidcitations
- 2023Effect of surface preparation by high-temperature hydrogen annealing on the passivation of Ni-20 at.% Cr alloy in sulfuric acidcitations
- 2023Effect of marine microbial activity in corrosion inhibition of 5083 aluminium alloy [Comunicação oral]
- 2022Enhanced passivity of Cr-Fe-Co-Ni-Mo multi-component single-phase face-centred cubic alloys: design, production and corrosion behaviourcitations
- 2022Effect of marine microbial activity in corrosion inhibition of 5083 aluminium alloy
- 2021XPS and ToF-SIMS Investigation of Native Oxides and Passive Films Formed on Nickel Alloys Containing Chromium and Molybdenumcitations
- 2021Insight on passivity of high entropy alloys: thermal stability and ion transport mechanisms in the passive oxide film on CoCrFeMnNi surfacescitations
- 2020Study of the surface oxides and corrosion behaviour of an equiatomic CoCrFeMnNi high entropy alloy by XPS and ToF-SIMScitations
- 2020Inhibition of Mg Corrosion by Sulfur Blocking of the Hydrogen Evolution Reaction on Iron Impuritiescitations
- 2019Influence of post-treatment time of trivalent chromium protection coating on aluminium alloy 2024-T3 on improved corrosion resistancecitations
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article
Early-stage surface oxidation of the equiatomic CoCrFeMnNi high entropy alloy studied in situ by XPS
Abstract
The mechanisms of initial oxide growth on the equiatomic CoCrFeMnNi high entropy alloy were studied in situ by X-ray photoelectron spectroscopy on clean, oxide-free surfaces exposed stepwise to low-pressure gaseous oxygen. Cr(III), Mn(III), Fe(III), Co(II) but no Ni(II) oxides were formed at 100 °C, and Mn(II) at 200 °C. Data quantification revealed a transition mechanism from selective initial oxidation to 3D kinetically-controlled growth, leading to stratification of the oxide film. Formation of the Co-rich outer layer above the Cr-rich inner layer first formed implies predominant cationic outward oxide growth supported by the overall stoichiometry of the film.