Thyssenkrupp Steel Europe Ag

Thyssen Krupp Ag

Fabian Junge

Janko Banik

Maria Köyer

Manuela Ruthenberg

Tobias Lewe

Burak William Cetinkaya

Oliver Vogt

Gregor Müller

Jennifer Schulz

Nicole Weiher

Frank Panter

Heinrich Meyring

Christine Bischoff

Burak William Centinkaya

Burak-William Cetinkaya

Robin Dohr

Christian Altgassen

The present disclosure relates to a process for producing a surface-treated and surface-finished sheet steel. A sheet steel having a zinc-based coating is provided, wherein zinc grains are distributed within the coating. The surface-treated sheet steel are skin-pass rolled to form embossed regions and unembossed regions on the surface of the sheet steel provided with a zinc-based coating. Skin-pass rolling is performed with a degree of skin-pass greater than 1% in such a way that due to the force exerted by the skin-pass rolling the zinc grains in the embossed region are altered in dimension relative to the zinc grains in the unembossed region.

Method for producing a surface-treated and surface-conditioned steel sheet

The invention relates to a sheet steel skin-pass rolled with a deterministic surface structure, and to a method for producing it.

Sheet steel having a deterministic surface structure

The invention relates to sheet steel, more particularly a coated sheet steel, which is skin-pass rolled with a deterministic surface structure, and to a method for producing this steel.

The invention relates to a steel sheet skin-pass rolled with a deterministic surface structure, and to a method for producing it.

The invention relates to a sheet steel () coated with a zinc-based coating and skin-pass rolled with a deterministic surface structure (), and to a method for producing it.

A method of activating a metal surface, such as a galvanized steel sheet, before a phosphating process, may involve bringing the metal surface into contact with an activating bath containing activating particles, which may be based on phosphate and/or titanium, dispersed in water. To alleviate or even eliminate the problems of poor adhesion of surface coatings to preferably electrolytically galvanized, phosphated metal strip, an additive that suppresses or at least slows agglomeration of the activating particles may be added to the activating bath. In some examples, polyethylene glycol (PEG) and/or sodium stearate may be added. Further, the particle size distribution of the activating particles present in the activating bath may be determined and the activating bath may be replaced or taken out of operation as a function of the particle size distribution of the activating particles.

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Düsseldorf, Germany

Fabian Junge