Crofer 22 APU offers a good balance of the properties required for high temperature electrochemistry. This makes Crofer 22 APU a very popular material for. The oxidation kinetics of the Crofer 22 APU steel—uncoated and coated with LSCF48—approximately obeys the parabolic rate law in air at. material used for the experiments was the Crofer 22 APU ferritic stainless steel from ThyssenKrupp VDM GmBH, Germany. The chemical composition of this.

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Each cell contains an anode, cathode and ceramic zirconium dioxide croffr the electrolyte to start the power generation process. Chromium also limits the thermal expansion of the alloy, giving it a similar coefficient of expansion to the surrounding ceramic electrolyte. Critical to this is its 0.

However, at temperatures of degrees, the chromium is released and destroys the electrolyte. In the melting furnace, where several tons of the croofer are produced in one charge, minimum amounts of alloying elements have to be added in precise quantities. Normally, metallic materials achieve their long-term stability at such temperatures by means of high chromium content.


This so-called chromium-manganese spinel prevents chromium evaporation and rcofer the same time assures the necessary electrical conductivity of the interconnector plates.

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Central Press Office for Journalists. It can be formed without problems, given ribs or other surface structures and machined using conventional production methods and equipment. The most important components of the SOFC stack are the interconnector plates between the cells.

Crofer 22 APU, an iron-chromium alloy, for the first time fulfils aph previously conflicting requirements of good zpu stability, high electrical conductivity and low coefficient of expansion. The starting materials for energy conversion can be hydrogen, natural gas or reformed gasoline.

Together with the other alloying elements titanium and manganese, the lanthan ensures that a protective coating of chromium manganese oxide forms on the surface of the interconnector plates as api as the fuel cell becomes active.

The ap plates are made of Crofer 22 APU. Home Newsroom Press releases. As well as making the electrical connection rcofer also supply the cells with fuel gas and air via gas passages.


While the ceramic materials used previously for the interconnector plates do not have the problem of chromium evaporation, they are unsuitable for economic volume production due to the complex production requirements involved for example in milling the passages for the gas supply. The SOFC is a fuel cell variant which works at temperatures up to degrees.

Crofer 22 APU Interconnect Sheets

The main reason is the high operating temperature of the fuel cells. Products and solutions, During subsequent hot rolling it is important that the temperature window is observed precisely.

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The aim is crpfer use an SOFC plant as a supplement for battery and dynamo. The manufacture of Crofer 22 APU requires extreme precision at every stage of the production process.

In terms of fabrication, however, Crofer 22 APU is just as easy to handle as a standard stainless steel.