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 › peer-review

12 Citations (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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10.1016/j.corsci.2020.108468

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title = "Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800",

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.",

keywords = "Corrosion resistance, Dealloying, Iron alloys, Nickel-based superalloy, Porous material",

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AU - Mokhtari, Morgane

AU - Wada, Takeshi

AU - Le Bourlot, Christophe

AU - Duchet-Rumeau, Jannick

AU - Kato, Hidemi

AU - Maire, Eric

AU - Mary, Nicolas

N1 - Funding Information: This work was supported by ICC-IMR (Tohoku University, Japan), Région Rhone-Alpes [CMIRA 138249], the Erasmus+ program , and the French Ministry of Research . Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/4/15

Y1 - 2020/4/15

N2 - 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.

AB - 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.

KW - Corrosion resistance

KW - Dealloying

KW - Iron alloys

KW - Nickel-based superalloy

KW - Porous material

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

Abstract

Keywords

ASJC Scopus subject areas

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