Atotech Deutschland Gmbh

Fernsteuergerate Kurt Oelsch Gmbh

Klaus-Dieter Schulz

Philip Hartmann

Philipp Wachter

Heiko Brunner

Lars Kohlmann

Wolfgang Dahms

Mike Briese

Richard Richter

Thomas Moritz

Thomas Neumann

Holger Weide

Rajasekaran Neelamegam

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

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

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 plating bath for the deposition of satin nickel deposits according to the present invention contains at least one quarternary ammonium compound and at least one polyether, the at least one polyether having at least one strongly hydrophobic side chain. As compared to prior art plating baths, this acid plating bath has the advantage that it enables a long period of operation or heating and cooling cycles or filtration cycles, makes it possible to perform the filtration needed for continually operating the bath without using active carbon, requires a lower concentration of nickel than prior art baths to produce the satin gloss finish and has a reduced sensitivity to wetting agents that have been dragged in.

Acid plating bath and method for the electrolytic deposition of satin nickel deposits

In order to achieve an even satin-finished nickel or nickel alloy coating an acid nickel or nickel alloy electroplating bath is proposed which contains a sulfosuccinic acid compound of the general formula I additional to at least one quaternary ammonium compound, wherein R, R=hydrogen ion, alkali ion, alkaline earth ion, ammonium ion and/or C-Chydrocarbon moiety, wherein Rand Rare identical or different with the proviso that at the most one of the groups Rand R=hydrogen ion, alkali ion and alkaline earth ion, and wherein K=hydrogen ion, alkaline ion, alkaline earth ion, ammonium ion

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Falkensee, Germany

Klaus-Dieter Schulz