Thyssenkrupp Steel Europe Ag

Outokumpu Nirosta Gmbh

Thyssen Krupp Ag

Stefan Peter Puls

Bernd Schuhmacher

Jens-Ulrik Becker

Michael Steinhorst

Stefan Wischmann

Roland Wunderlich

Horst Walter Tamler

Hans-Joachim Krautschick

Dirk Wiemer

Patrick Kuhn

Nicole Weiher

Roman Glass

Frank Wörster

Nina Kolbe

Janine Schauer-Paβ

Michael Strack

Krasimir Nikolov

Utz Karsten

Jörg Kazmierski

Klaus Manfred Lange

A method for producing a flat steel product with high reflectivity, in which at least one surface has an arithmetic mean roughness Ra of less than 0.03 &#x3bc;m includes providing a flat steel product, at least one surface of which has an arithmetic mean roughness Ra of less than 2.5 &#x3bc;m. The flat steel product is cold rolled in a plurality of rolling passes. Also a flat steel product with high reflectivity in the finished re-rolled state on at least one of its surface has a low arithmetic mean roughness, a high gloss, and a high directed reflection. A solar concentrator is produced from such a flat steel product.

Flat steel product with high reflectivity, flat steel product and mirror element for solar concentrators

A bipolar plate which can be produced particularly economically for a fuel cell, with which a high degree of efficiency is guaranteed over a long service life. The bipolar plate has a core layer consisting of a steel material, the surfaces of said core layer, which are associated with the respective electrolyte carriers of the fuel cell, having a corrosion protection layer, protecting the core layer against corrosion. The corrosion protection layers consist of a metal material and extend on both sides over the whole surface of the core layer. At the same time the corrosion protection layers are in turn coated over the whole surface with an electrically conductive functional coating, which is essentially entirely impermeable for the metal ions emerging from the core layer and/or the corrosion protection layers. The invention likewise relates to at least one fuel cell comprising a bipolar plate according to the invention.

Bipolar plate for a fuel cell and fuel cell stack

Growing community of inventors

Dortmund, Germany

Stefan Peter Puls