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Institute of Energy and Climate Research (IEK)

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Chromium Evaporation Tests on Metallic Interconnects
for Solid Oxide Fuel Cells

Fuel cell technology holds out the prospect of generating energy with a high efficiency. If renewable fuels are used, it facilitates low-emission energy conversion and CO2-neutral energy supply.

High-temperature solid oxide fuel cells (SOFCs) are an example of this technology. The operating temperature of 800 °C to 1000 °C means that requirements are high for SOFC materials. Above all, the materials must be mechanically stable and resistant to corrosion.

In order to reduce the costs of fuel cells, metallic interconnects have been used in the last few years. Chromium oxide-forming steels are easy to combine with the other components of fuel cells and are therefore suitable candidates. However, chromium compounds are formed that cause undesirable ageing effects (degradation) in the fuel cells.

A transpiration facility is used to study chromium evaporation from different austenitic and ferritic steel alloys.

Sample recipientSample recipient

Corroded metallic interconnects materialCorroded metallic interconnects material