Reduced long term electrical resistance in Ce/Co-coated ferritic stainless steel for solid oxide fuel cell metallic interconnects
Artikel i vetenskaplig tidskrift, 2015

The present study is focused on the influence of selected coatings on a ferritic stainless steel (Sanergy HT (TM), Sandvik) on the evolution of the area specific resistance (ASR) as a function of time at high temperature. The samples are exposed in humidified air at 850 degrees C for up to 4200 h. It combines long-term ASR measurements with the thermogravimetric behavior and microstructural analysis of the cross sections by scanning electron microscopy. The results show that uncoated and Co-coated Sanergy HT (TM) exhibit similar oxidation kinetics and comparable ASRs, while a combined Ce/Co coating improves oxidation resistance and, consequently, reduces the ASR significantly. Other reports have earlier shown that Co- (and Ce/Co)-coated Sanergy HT (TM) reduces the evaporation of volatile chromium species. Overall, the study indicates that Ce/Co-coatings will render substantially improved performance for ferritic steel interconnects for solid oxide fuel cells.

Conductivity

Stainless steel

Metallic coating

Interconnects

SOFC

ASR

Författare

A. Magraso

Agencia Estatal Consejo Superior de Investigaciones Científicas (CSIC)

Universitetet i Oslo

Hannes Falk Windisch

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Jan Froitzheim

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

R. Haugsrud

Universitetet i Oslo

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 40 27 8579-8585

Ämneskategorier

Metallurgi och metalliska material

DOI

10.1016/j.ijhydene.2015.04.147

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Senast uppdaterat

2018-09-06