Oxide scale evolution and its impact on the volatilization rate of a chromia-forming Ni-based superalloy: Experimental and transient CFD study
Abstract
The evolution with oxidation time of the chemical composition of the oxide scale of In625 was experimentally studied at 900 °C under an atmosphere of N2-14.7%O2-30%H2O (vol%). As time goes by, the initial chromia scale was progressively replaced by other oxides rich in Ni, Nb, Ti or Mn, decreasing the activity of chromia. By developing a new transient CFD model, this temporal evolution in chromia activity was simulated for different superficial gas velocities. Simulation results well represented the changes observed experimentally with a decrease in volatilization rate as chromia was progressively consumed by volatilization. The simulation provided new insights on the coupled influence of local gas velocity and composition on the heterogeneities in volatilization rate and chromia coverage evolving with time, as observed on samples.
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BibTeX
@article{duthoit2026oxide,
title = {{Oxide scale evolution and its impact on the volatilization rate of a chromia-forming Ni-based superalloy: Experimental and transient CFD study}},
author = {Guillaume Duthoit and Antonin Faye and Matteo Piazza and Jérôme Esvan and Hugues Vergnes and Brigitte Caussat and Daniel Monceau and Aurélie Vande Put},
journal = {Corrosion Science},
year = {2026},
month = jun,
doi = {10.1016/j.corsci.2026.114045},
url = {https://cnrs.hal.science/hal-05853466v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Oxide scale evolution and its impact on the volatilization rate of a chromia-forming Ni-based superalloy: Experimental and transient CFD study
AU - Guillaume Duthoit
AU - Antonin Faye
AU - Matteo Piazza
AU - Jérôme Esvan
AU - Hugues Vergnes
AU - Brigitte Caussat
AU - Daniel Monceau
AU - Aurélie Vande Put
PY - 2026
DA - 2026/06/15
JO - Corrosion Science
DO - 10.1016/j.corsci.2026.114045
UR - https://cnrs.hal.science/hal-05853466v1
AB - The evolution with oxidation time of the chemical composition of the oxide scale of In625 was experimentally studied at 900 °C under an atmosphere of N2-14.7%O2-30%H2O (vol%). As time goes by, the initial chromia scale was progressively replaced by other oxides rich in Ni, Nb, Ti or Mn, decreasing the activity of chromia. By developing a new transient CFD model, this temporal evolution in chromia activity was simulated for different superficial gas velocities. Simulation results well represented the changes observed experimentally with a decrease in volatilization rate as chromia was progressively consumed by volatilization. The simulation provided new insights on the coupled influence of local gas velocity and composition on the heterogeneities in volatilization rate and chromia coverage evolving with time, as observed on samples.
SN - 0010-938X
SN - 1879-0496
ER -