Chemetall Gmbh

Metallgesellschaft Aktiengesellschaft

Other

Hardy Wietzoreck

Klaus Bittner

Thomas Wendel

Thomas Kolberg

Marcus Schinzel

Toshiaki Shimakura

Norbert Maurus

Heribert Domes

Christian Jung

Werner Rausch

Dieter Hauffe

Peter M&uuml;ller

Mats Eriksson

Horst Gehmecker

Olaf Dahlenburg

Marion Wegner

Jürgen Specht

Georg Blumlhuber

Gerrit Schüllermann

Thomas Nitschke

Lothar Kaul

Klaus-Peter Mohr

Walter Km Jansen

Helmut Hulsmann

Peter Schiefer

Timo Christoph Ceglarek

Martin Mrochem

Described herein is an alternative acidic, aqueous composition for effectively phosphating metallic surfaces, which includes, besides zinc ions, manganese ions, phosphate ions and, preferably, nickel ions, at least one accelerator of a formula RRRC—NOwhere each of the substituents R, Rand Ron the carbon atom is selected, independently of the others, from the group consisting of hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 1-hydroxypropyl, 2-hydroxypropyl, 3-hydroxypropyl, 1-hydroxy-1-methylethyl and 2-hydroxy-1-methylethyl. Also described herein are a method for producing such a composition, an alternative method for phosphating metallic surfaces, and a method of using phosphate coatings produced accordingly.

Alternative composition and alternative method for effectively phosphating metal surfaces

A method for coating of a metallic coil or of metallic sheets with an aqueous coating composition comprising at least one compound selected from the group consisting of zirconium compounds, titanium compounds and hafnium compounds whereby the such treated metallic coil or metallic sheets is/are shaped by cold extruding, by deep-drawing, by drawing, by necking, by punching, by wall ironing or by any combination of such process steps to a hollow article like a container or a casing and is then cleaned and optionally further coated either by chemical pre-treatment and then by coating with ink or paint or both or by chemical treatment.

Method for coating of metallic coil or sheets for producing hollow articles

A method for coating metallic surfaces with a paint or paint-like coating prior to forming.

Method for pretreating and/or coating metallic surfaces with a paint-like coating prior to forming and use of substrates coated in this way

The invention relates to a method for coating a metallic strip. The strip or optionally, the strip sections produced from said strip in the subsequent process, is/are first coated with at least one anticorrosion layer&#x2014;according to an alternative form of embodiment, this can be left out&#x2014;and then with at least one layer of a paint-like coating containing polymers. After being coated with at least one anticorrosion layer or after being coated with at least one layer of a paint-like coating, the strip is divided into strip sections. The coated strip sections are then formed, joined and/or coated with at least one (other) paint-like coating and/or paint coating. The paint-like coating is formed by coating the surface with an aqueous dispersion containing the following in addition to water: a) at least one organic film former containing at least one water-soluble or water-dispersed polymer with an acid value of 5 to 200; b) at least one inorganic compound in particle form with an average particle diameter measured on a scanning electron microscope of 0.005 to 0.3 &#x3bc;m; and c) at least one lubricant and/or at least one corrosion inhibitor. The metallic surface that is optionally coated with at least one anticorrosion layer is brought into contact with the aqueous composition and a film containing particles is formed on the metallic surface, this film then being dried and optionally also hardened, the dried and optionally, also hardened film having a layer thickness of 0.01 to 10 &#x3bc;m. The invention also relates to a corresponding aqueous composition.

Metallic surfaces are coated with an aqueous, acidic phosphate solution containing 10 to 60 g/l zinc, 0.5 to 40 g/l manganese, 50 to 300 g/l phosphate ions calculated as PO, and optionally other components.

Method for applying a phosphate covering and use of metal parts thus phospated

Pretreatment of aluminum surfaces with chrome-free solutions

Method of applying phosphate coatings to metal surfaces

Process for the phosphatising treatment of steel strip or sheet

A process for forming phosphate coatings on metal surfaces is provided which comprises the steps of contacting said metal surface with an Fe(II)-containing phosphating solution comprising

Process of forming phosphate coatings on metal surfaces

Growing community of inventors

Frankfurt am Main, Germany

Hardy Wietzoreck