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

Research output: Contribution to journalArticle

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 languageEnglish
Article number108468
JournalCorrosion Science
Volume166
DOIs
Publication statusPublished - 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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