Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800

Morgane Mokhtari; Takeshi Wada; Christophe Le Bourlot; Jannick Duchet-Rumeau; Hidemi Kato; Eric Maire; Nicolas Mary

doi:10.1016/j.corsci.2020.108468

Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800

Morgane Mokhtari, Takeshi Wada, Christophe Le Bourlot, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire, Nicolas Mary

Materials Development Division

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Liquid metal dealloying is a newly available technology used to create bulk porous materials. In this study, a commercial nickel-based superalloy, Incoloy 800, was dealloyed to elaborate a fully porous ferritic stainless steel. The Mg selective dissolution in nitric acid solution acts as a passivation treatment that enhances the passive film resistance. Corrosion tests confirm the beneficial effect of the nitric acid treatment on the Cr enrichment of the passive film thus improved the material resistance. The electrochemical characterizations show a higher effect of the size porosities on the diffusion kinetics of the electrolyte rather than on the pitting sensitivity.

Original language	English
Article number	108468
Journal	Corrosion Science
Volume	166
DOIs	https://doi.org/10.1016/j.corsci.2020.108468
Publication status	Published - 2020 Apr 15

Keywords

Corrosion resistance
Dealloying
Iron alloys
Nickel-based superalloy
Porous material

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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Mokhtari, M., Wada, T., Le Bourlot, C., Duchet-Rumeau, J., Kato, H., Maire, E., & Mary, N. (2020). Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800. Corrosion Science, 166, [108468]. https://doi.org/10.1016/j.corsci.2020.108468

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AU - Kato, Hidemi

AU - Maire, Eric

AU - Mary, Nicolas

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