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 |
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Article number | 108468 |
Journal | Corrosion Science |
Volume | 166 |
DOIs | |
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)