11–23% Cr steels for solid oxide fuel cell interconnect applications at 800 °C – How the coating determines oxidation kinetics
Artikel i vetenskaplig tidskrift, 2023

The present work investigates the low-cost steels AISI 441, AISI 430, and AISI 444 against the tailor-made high Cr steel Crofer 22 APU (22.9 wt% Cr) at 800 °C in simulated solid oxide fuel cell (SOFC) cathode conditions. Furthermore, a low Cr steel, AISI 409 (11.4 wt% Cr) is included in the study. The oxidation, chromium evaporation, and area-specific resistance (ASR) of the uncoated and Ce/Co-coated steels are studied for up to 3000 h. Ce/Co-coated steels showed significant improvement in behaviour compared to their uncoated counterparts. The oxidation and chromium evaporation behaviour between the uncoated steels varied substantially while the Ce/Co coated steels exhibited highly similar behaviour. The area-specific resistance of the coated low-cost steels was on par with Crofer 22 APU. However, 430 formed a continuous silica layer, resulting in a higher ASR after 3000 h. Cross-sections of the uncoated and Ce/Co-coated steels were analysed using a scanning electron microscope and energy dispersive X-ray spectroscopy.

Cr evaporation

Solid oxide fuel cell

Ce/Co coating

Comparision

Interconnect

Reactive element effect

Författare

Mareddy Reddy

Chalmers, Kemi och kemiteknik, Energi och material

T. E. Chausson

Université de Toulouse

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material

Jan Froitzheim

Chalmers, Kemi och kemiteknik, Energi och material

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 48 34 12893-12904

Utveckla kostnadseffektiva metalliska material för fastoxidceller för ett elektrifierat samhälle

VINNOVA (2021-01003), 2021-05-01 -- 2024-08-31.

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Metallurgi och metalliska material

Korrosionsteknik

DOI

10.1016/j.ijhydene.2022.11.326

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Senast uppdaterat

2024-03-07