Henkel Kommanditgesellschaft Auf Aktien

Gerhard Collardin Gmbh

Wolf-Achim Roland

Peter Christophliemk

Karl-Heinz Gottwald

Helmut Endres

Karl-Dieter Brands

Jan-Willem Brouwer

Joerg Riesop

Juergen Lindener

Torsten Koerner

Josef Kresse

Matthias Hamacher

Bernd Mayer

Roland Morlock

Wolfgang Bechstedt

Karl Dieter Brands

Cornelia Finnenthal

Andreas Nowak

The invention is a process for applying a nickel-free, copper-containing phosphate coating to a metal surface by contacting the metal surface with a phosphate solution containing 0.2 to 2.0 g/l zinc ions, 0.5 to 25 mg/l copper ions, and 5-30 g/l phosphate ions.

Nickel-free phosphating process

Chromium-free process for improving paint adhesion after thin-layer

Short duration hot seal for anodized metal surfaces

Method of compacting anodized metals with lithium and

Process for preparing zinc phosphate coatings containing manganese and

Effective, titanium-free agents for activating metal surfaces prior to phosphating these surfaces with phosphating baths containing zinc ions can be made by reacting alkali metal phosphates with 1,1-diphosphonic acids and their alkali metal slats and/or poly(aldehydocarboxylic acids) and their alkali metal salts.

Titanium free composition and process for activating metal surfaces

Effective, titanium-free agents for activating metal surfaces prior to phosphating these surfaces with phosphating baths containing zinc ions can be made by reacting alkali metal phosphates with 1,1-diphosphonic acids and their alkali metal salts and/or poly(aldehydocarboxylic acids) and their alkali metal salts.

The adhesion of, and corrosion protection provided by, organic surface coatings to underlying metal can be significantly improved if the degreased, etched, and pickled metal surfaces to be coated are first treated with an aqueous solution and/or dispersion of aluminum-zirconium complexes, which are obtainable as the reaction-product of a chelated aluminum component, an organo-functional ligand component, and a zirconium oxyhalide component, with the organo-functional ligand being chemically bonded to the chelated aluminum unit and the zirconium unit in the complex, and are subsequently treated with dilute aqueous solutions, emulsions, and/or dispersions of one or more inorganic and/or organic film-forming materials prior to coating the surfaces with conventional organic surface coatings.

Chromium free treatment before coating metal surfaces

Activation of metal surfaces prior to phosphating can be improved by using aqueous dispersions of polymeric titanium(IV) phosphates in which at least 95% by weight of the polymeric particles have a particle diameter of less than 200 nm. This low particle diameter is attained by adding a titanium(IV)-complexing agent before or during an otherwise conventional reaction between a titanium(IV) compound, acid or phosphate, and water. The complexing agent is used in an amount of less than the stoichiometric amount, based on the titanium(IV) content. The best complexing agents are poly(aldehydocarboxylic acids), 1,1-diphosphonic acids, and/or the alkali metal salts of these types of acids.

Composition and process for activating metal surfaces prior to zinc

A fluid, two-component washing agent consisting of two components A and B, of which component A is an aqueous dispersion of fatty acids and component B is an alkaline solution, wherein component A is a cold-stable aqueous dispersion consisting essentially of:

Fluid, cold-stable, two-component washing compositions and method of

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Solingen, Germany

Wolf-Achim Roland