The Effect of Metallic Co-Coating Thickness on Ferritic Stainless Steels Intended for Use as Interconnect Material in Intermediate Temperature Solid Oxide Fuel Cells
Artikel i vetenskaplig tidskrift, 2018

The effect of metallic Co-coating thickness on ferritic stainless steels is investigated. This material is suggested to be used as interconnect material in intermediate temperature solid oxide fuel cells. Uncoated, 200-, 600-, 1000-, and 1500-nm Co-coated Sanergy HT is isothermally exposed for up to 500 h in air at 650 A degrees C. Mass gain is recorded to follow oxidation kinetics, and area-specific resistance (ASR) measurements are conducted on samples exposed for 168 and 500 h. The microstructure of the thermally grown oxide scales is characterized utilizing scanning electron microscopy and energy-dispersive X-ray analysis on broad ion beam-milled cross sections. A clear increase in ASR as a function of Co-coating thickness is observed. However, the increase in ASR, as an effect of a thicker Co-coating, is correlated with thicker (Cr,Fe)(2)O-3 scales formed on these materials and not to an increase in Co spinel top layer thickness.

Solid oxide fuel cell

Coating

Interconnect

Area-specific resistance

Corrosion

Författare

Hannes Falk Windisch

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

Julien Claquesin

Chalmers, Kemi och kemiteknik, Energi och material

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material

Jan Froitzheim

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

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 89 1-2 233-250

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Materialkemi

Annan materialteknik

DOI

10.1007/s11085-017-9782-9