Research Progress on Corrosion of Metal Interconnector for Solid Oxide Fuel Cells

doi:10.11902/1005.4537.2022.049

Journal of Chinese Society for Corrosion and protection

2023, Vol. 43

Issue (1): 6-12 DOI: 10.11902/1005.4537.2022.049

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Research Progress on Corrosion of Metal Interconnector for Solid Oxide Fuel Cells

WANG Bihui, XIAO Bo, PAN Peiyuan, LIU Ju, ZHANG Naiqiang(

)

North China Electric Power University, College of Energy Power and Mechanical Engineering, Beijing 102206, China

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Abstract

Ferritic stainless steels are used in solid oxide fuel cell (SOFC) as interconnect materials, which present low cost and good workability, and high electroconductivity. However, the harsh environment limits their use in SOFC stack. This paper introduces the current research status of corrosion of metallic interconnectors, summarizing researches on the influence of the air, fuel, dual atmosphere, alloying elements, and internal contact environment. The corrosion mechanism of interconnect material and the shortcomings of the research on the corrosion behavior of interconnectors, as well as the direction of future development were systematically described.

Key words: solid oxide fuel cell high-temperature corrosion interconnect ferritic stainless steel

Received: 28 February 2022 32134.14.1005.4537.2022.049

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Cite this article:

WANG Bihui, XIAO Bo, PAN Peiyuan, LIU Ju, ZHANG Naiqiang. Research Progress on Corrosion of Metal Interconnector for Solid Oxide Fuel Cells. Journal of Chinese Society for Corrosion and protection, 2023, 43(1): 6-12.

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https://www.jcscp.org/EN/10.11902/1005.4537.2022.049 OR https://www.jcscp.org/EN/Y2023/V43/I1/6

Fig.1 Chromia and chromium-manganese oxide as a function of oxidized time at 850 ℃: (a) changes in thickness of scale with oxidation time, (b) prediction model for the thickness of the scales on each oxidation stage^[9]

Fig.2 Surface morphology of AISI441 exposed at 800 ℃ during 80 h: (a) 50%CH₄+50%CO₂, (b) 70%CH₄+30%CO₂^[29]

Fig.3 SEM observation of the scale on Crofer22 APU after isothermal oxidation at 800 ℃ for 300 h: (a) cross-section microstructures of the airside scale on dual atmosphere oxidized air side; (b) EDS linear analysis on cross-sections from area A in Fig.3a; (c) EDS linear analysis on cross-sections from area B in Fig.3a^[32-35]

Fig.4 Schematic diagram of materials interaction at the anode side of SOFC in case of ferritic steel intercon-nect in contact with Ni wire mesh^[23]

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