Ewald Dorken Ag

Thyssenkrupp Steel Europe Ag

Vito Nv

Ingo Klüppel

Lothar Patberg

Marcel Roth

Gerhard Reusmann

Axel Grüneklee

Ingo Rogner

Stefan Mayer

Martin Norden

Verena Grossmann

Reiner Wark

Bert Verheyde

Danny Havermans

Carolina Battaglia

Melanie Müller

Sabine Paulussen

Gabriella Da Ponte

Christopher Köster

Holger Grolmes

Michael Strack

Hanna Smoll

Miroslaw Giza

Nicolé Scherf

The present invention relates to a method for adjusting a passivation composition by determining the redox potential of a passivation composition as well as to a method for passivating metallic substrates by treatment with a passivation composition.

Method for passivating metallic substances

The invention relates to a method for producing a silane-modified silicate. In order to obtain optimal corrosion protection properties, a silane compound according to the invention is at least partially hydrolyzed and/or condensed in the presence of a silicate compound at a pH value greater than or equal to 8 and then a pH value less than or equal to 7 is set by adding acid. The invention further relates to an aqueous acidic passivation composition for metal substrate coated with the passivation composition.

Passivation composition comprising a silane-modified silicate compound

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Bochum, Germany

Ingo Klüppel