Corrosion Science and Technology

  • 제23권1호
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  • Pages.33-40
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  • 2024
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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The Effect of Mo Addition on Oxygen Vacancies in the Oxide Scale of Ferritic Stainless Steel for SOFC Interconnects

  • 투고 : 2023.11.13
  • 심사 : 2023.11.28
  • 발행 : 2024.02.29
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초록

The concentration and diffusion coefficient of oxide ion vacancies in the oxide scale formed on Fe-22Cr-0.5Mn ferritic stainless steel with and without molybdenum (Mo) was measured at 800℃ by the electrochemical polarization method. After pre-oxidation for 100 h in ambient air at 800 ℃, the oxide scale on one side was completely removed with sandpaper. A YSZ plate was placed on the side where the oxide scale remained. Platinum (Pt) meshes were attached on the top of the YSZ plate and the side where the oxide scale was removed. Changes in electrical current were measured after applying an electrical potential through Pt wires welded to the Pt meshes. The results were interpreted by solving the diffusion equation. The diffusion coefficient and concentration of oxide ion vacancy decreased by 30% and 70% in the specimen with Mo, respectively, compared to the specimen without Mo. The oxide ion vacancy concentration of chromia decreased due to the addition of Mo.

키워드

과제정보

This research was supported by grants from the Energy Technology Development Project (20203030030020) funded by the Ministry of Trade, Industry and Energy, Republic of Korea.

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