Atotech Deutschland Gmbh

Nissan Motor Company Limited

Atotech Deutschland Gmbh & Co. Kg

Philip Hartmann

Philipp Wachter

Klaus-Dieter Schulz

Heiko Brunner

Lars Kohlmann

Hiroshi Sakai

Christina Pfirrmann

Mike Briese

Richard Richter

Wolfgang Dahms

Udo Grieser

Carl Christian Fels

Bernd Roelfs

Soichiro Sugawara

Torsten Voss

Stefan Kretschmer

Michael Jonat

Nancy Born

Olanda Grieser, Legal Representative

Christopher Grieser, Legal Representative

Frank Bayer

Mathias Wuensche

Juan-Carlos Umaran

Udo (deceased) Grieser

Rajasekaran Neelamegam

Klaus Dieter Schulz

The present invention relates to a method for etching at least one surface of a plastic substrate, the method comprising steps (A) to (C), wherein step (B) comprises a contacting with a pre-treatment composition comprising one or more than one fluorine-free surface-active compound, and step (C) comprises a contacting with an etching composition comprising one or more than one manganese species, wherein after step (B) and prior to step (C) no rinsing is applied, and the etching composition is substantially free of, preferably does not comprise, fluorine-containing surface-active compounds.

Method for etching at least one surface of a plastic substrate

The present invention is to provide a chrome-plated part having a corrosion resistance in normal and specific circumstances and not requiring additional treatments after chrome plating, and to provide a manufacturing method of such a chrome-plated part. The chrome-plated partincludes: a substrate; a bright nickel plating layerformed over the substrate; a noble potential nickel plating layerformed on the bright nickel plating layer. An electric potential difference between the bright nickel plating layerand the noble potential nickel plating layeris within a range from 40 mV to 150 mV. The chrome-plated partfurther includes: a trivalent chrome plating layerformed on the noble potential nickel plating layerand having at least any one of a microporous structure and a microcrack structure.

Chrome-plated part and manufacturing method of the same

The present invention is to provide a chrome-plated part having a corrosion resistance in normal and specific circumstances and not requiring additional treatments after chrome plating, and to provide a manufacturing method of such a chrome plated part. The chrome-plated partincludes: a substrate; a bright nickel plating layerformed over the substrate; a noble potential nickel plating layerformed on the bright nickel plating layer. An electric potential difference between the bright nickel plating layerand the noble potential nickel plating layeris within a range from 40 mV to 150 mV. The chrome-plated partfurther includes: a trivalent chrome plating layerformed on the noble potential nickel plating layerand having at least any one of a microporous structure and a microcrack structure.

The present invention concerns a method for increasing the adhesion between a chromium surface and a lacquer wherein said chromium surface is contacted with an aqueous solution comprising at least one phosphorous compound according to formulae R&#x2014;P(O)(OR)(OR) 1 and R&#x2014;O&#x2014;P(O)(OR)(OR) 2 wherein Ris a Cto Calkyl group, linear, branched or cyclic comprising at least one polar residue and Rand Rare independently selected from the group consisting of hydrogen, lithium, sodium, potassium, ammonium and Cto Calkyl while passing an external electrical current through said substrate and at least one anode wherein said substrate serves as the cathode.

Method for increasing adhesion between a chromium surface and a lacquer

The invention relates to methods and plating baths for electrodepositing a dark chromium layer on a workpiece. The trivalent chromium electroplating baths comprise sulphur compounds and the methods for electrodepositing a dark chromium layer employ these trivalent chromium electroplating baths. The dark chromium deposits and workpieces carrying dark chromium deposits are suited for application for decorative purposes.

Electroplating bath and method for producing dark chromium layers

The invention relates to electroplating baths and methods for electrodepositing a dark chromium layer on a workpiece. The trivalent chromium electroplating baths comprise sulphur compounds and the methods for electrodepositing a dark chromium layer employ these trivalent chromium electroplating baths. The dark chromium deposits and workpieces carrying dark chromium deposits are suited for application for decorative purposes.

Disclosed is a chemical compound useful in a galvanic nickel or nickel alloy electroplating bath for depositing a semi-bright nickel or bright nickel alloy coating characterized in that the chemical compound has general formula IA: in which in general formula IA, Rand R&#x2550;-CHCHor Rand Rtaken together with the N atom form a pyrrolidine ring or a morpholine ring.

3-(carbamoyl) pyridinium-1-YL-propane-1-sulfonates useful in electroplating baths

The present invention is related to a galvanic nickel or nickel alloy electroplating bath for depositing a semi-bright nickel or nickel alloy coating characterized in that the electroplating bath comprises at least one compound having the general formula (I) 

Galvanic nickel electroplating bath for depositing a semi-bright nickel

The present invention concerns a method for cathodic corrosion protection of a substrate having a chromium surface and at least one intermediate layer between the substrate and the chromium surface, selected from the group comprising nickel, nickel alloys, copper and copper alloys and wherein said chromium surface is contacted with an aqueous solution comprising at least one compound containing phosphorous while passing an electrical current through said substrate, at least one anode and the aqueous solution wherein said substrate serves as the cathode.

Method for cathodic corrosion protection of chromium surfaces

A pyrophosphate-containing bath for the cyanide-free deposition of copper alloys on substrate surfaces, comprising a reaction product of a secondary monoamine with a diglycidyl ether, is described. The electrolyte bath is suitable for the galvanic deposition of glossy white, even and uniform copper-tin alloy coatings.

Pyrophosphate-containing bath for cyanide-free deposition of copper-tin alloys

For fast and secure determination of the quality of a metal coating as well as of an electrolyte for depositing a metal, in particular for electrolytic deposition of nickel such as of semi-gloss nickel and bright nickel and for analytical control of the deposition electrolyte, a method of inspecting a metal coating is provided, which involves the following method steps: a) depositing the metal coating from a deposition electrolyte onto a working electrode; b) electrolytically dissolving the metal coating through anodic polarization of the working electrode with respect to a counter electrode, which is in electrolytic contact with the working electrode; c) recording an electrical dissolution potential at the working electrode over time, said potential occurring during a dissolution of the metal coating; and d) determining a time-averaged vale of the dissolution potential.

Method of inspecting a metal coating and a method for analytical control of a deposition electrolyte serving to deposit said metal coating

An aqueous cyanide-free electrolyte bath for plating of tin alloy layers on substrate surfaces comprising (i) a tin ion source and a source for another alloy element, characterized in that it further contains (ii) N-methyl pyrrolidone is described.

Pyrophosphate-based bath for plating of tin alloy layers

The invention relates to a polyvinylammonium compound, to a method of manufacturing said compound, to an aqueous acidic solution containing at least said Polyvinylammonium compound for electrolytically depositing a copper deposit as well as to a method of electrolytically depositing a copper deposit using said aqueous acidic solution, said polyinylammonium compound corresponding to the general chemical formula (1): as well as to polyvinylammonium compounds of the general chemical formula (1), wherein one of the monomer units or both having indices I and m are present in the neutral form.

Polyvinylammonium compound, method of manufacturing same, acidic solution containing said compound and method of electrolytically depositing a copper deposit

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Berlin, Germany

Philip Hartmann