Severe dual atmosphere effect at 600 °C for stainless steel 441

JOURNAL OF POWER SOURCES

卷:301

Article

Alnegren, Patrik¹  Sattari, Mohammad¹  Svensson, Jan-Erik¹  Froitzheim, Jan¹ 

[1] Chalmers Univ Technol, Energy & Mat, S-41296 Gothenburg, Sweden

关键词: High temperature oxidation;    SOFC;    Interconnect;    Dual atmosphere;    Ferritic steel;    IT-SOFC;   

DOI  :  10.1016/j.jpowsour.2015.10.001

来源: Elsevier

【 摘 要 】

AISI 441 foils of 0.2 mm thickness were exposed in a dual atmosphere setup in which one side was exposed to air -3% H2O and the other to Ar -5% H-2 - 3% H2O. The experiment was performed at 600 degrees C and was referenced against exposures in air +3% H2O on both sides. The exposure conditions were chosen to simulate the conditions of an interconnect in intermediate temperature solid oxide fuel cell stacks (IT-SOFC). A strong dual atmosphere effect was observed: local breakaway corrosion was discovered after only 1000 h on samples exposed to dual atmospheres. After 3000 h iron oxide had propagated to cover the entire surface area of the sample. In comparison, the samples exposed in single atmosphere formed thin protective chromia scales on both sides even after 3000 h of exposure. (C) 2015 The Authors. Published by Elsevier B.V.

【 授权许可】

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