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Metal Dusting Problem with Metallic Interconnects for Solid Oxide Fuel Cell

Published online by Cambridge University Press:  11 February 2011

Z. Zeng  and
K. Natesan
Z. Zeng
Affiliation:
Argonne National Laboratory, Energy Technology Division Argonne, IL 60439, USA
K. Natesan
Affiliation:
Argonne National Laboratory, Energy Technology Division Argonne, IL 60439, USA
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Abstract

Metallic interconnects in the solid oxide fuel cell (SOFC) are oxidized on the cathode side by air and carburized on the anode side by natural gas. Metallic alloys can be attacked by metal dusting corrosion in carbonaceous gases of high carbon activity in the temperature range of 350–1000°C. Under these conditions, pits form on the alloy surface and can become large holes through the alloy plate, with subsequent disintegration into a powdery mixture composed of carbon, fine particles of metal, and carbide. Fe and Ni-base alloys were tested in carbonaceous gases around the SOFC operating temperature. It was found that the oxide scales on the alloy surface prevent metal dusting corrosion. If the major phase in the oxide scale is chromic oxide, the alloys have good resistance to metal dusting corrosion. However, the alloys are easily attacked if the major phase is spinel.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , FF4.2
Copyright
Copyright © Materials Research Society 2003

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References

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