Long-term (4 year) degradation behavior of coated stainless steel 441 used for solid oxide fuel cell interconnect applications

JOURNAL OF POWER SOURCES

卷:449

Article

Goebel, Claudia¹  Berger, Robert²  Bernuy-Lopez, Carlos²  Westlinder, Jorgen²  Svensson, Jan-Erik¹  Froitzheim, Jan¹ 

[1] Chalmers Univ Technol, Dept Chem & Chem Engn, Div Energy & Mat, Kemivagen 10, S-41296 Gothenburg, Sweden

[2] Strateg Res, Sandvik Mat Technol, Surface Res, S-81181 Sandviken, Sweden

关键词: SOFC;    Interconnect;    Corrosion;    Ce/Co coating;    AISI 441;    Long-term;   

DOI  :  10.1016/j.jpowsour.2019.227480

来源: Elsevier

【 摘 要 】

The present work aims to investigate the long-term stability of Ce/Co coated AISI 441 used as an interconnect material in solid oxide fuel cells (SOFC). Being a commercially available alloy the use of AISI 441 would greatly reduce the cost of SOFCs in comparison to tailor-made interconnect materials such as Crofer 22 APU. To analyze the long-term stability Ce/Co coated AISI 441 is exposed in air at 800 degrees C for up to 38 000 h. Mass gain values are recorded continuously. After 7 000, 23 000, and 35 000 h area specific resistance (ASR) measurements are performed, and cross-sections are prepared and analyzed using scanning electron microscopy (SEM) and energy dispersive x-ray (EDX) spectroscopy. Cr-evaporation measurements are conducted on samples exposed for up to 38 000 h.

【 授权许可】

Free