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Journal article

Evaluation of SUS430 with Mn-Co coating as SOFC interconnect in reducing atmosphere

By Jia, C.1; Chen, M.2,3; Han, M.1; Wu, J.4

From

Tsinghua University1

Department of Energy Conversion and Storage, Technical University of Denmark2

Solid State Chemistry, Department of Energy Conversion and Storage, Technical University of Denmark3

Harbin Institute of Technology4

In this study, the corrosion behavior of Mn-Co metallic coating on SUS430 steel in reducing atmosphere is evaluated at 800 °C. Samples are coated by commercial physical vapor deposition (PVD) and oxidized in humidified H2/N2 for 1250 hours. The results show the instability of this Mn-Co metallic coating in reducing atmosphere and the failure to protect the base material.

Further investigation by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy proves that the desired Mn-Co spinel cannot be formed in reducing atmosphere. In conclusion, this Mn-Co coating is not appropriate for the protection of corrosion of SUS430 interconnect at anode side.

New materials need to be found for good protection of the steels in order to increase the long-term performance of fuel cell stacks.

Language: English
Publisher: The Electrochemical Society
Year: 2019
Pages: 2241-2252
ISSN: 19385862 and 19386737
Types: Journal article
DOI: 10.1149/09101.2241ecst
ORCIDs: Chen, M.

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