Chemetall Gmbh

Timo Christoph Ceglarek

Hardy Wietzoreck

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.

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Frankfurt-am-Main, Germany

Timo Christoph Ceglarek