Umicore Galvanotechnik Gmbh

Sascha Berger

Uwe Manz

Bernd Weyhmueller

Klaus Bronder

Frank Oberst

Franz Simon

Michael Lauster

Mario Tomazzoni

The present invention relates to an electrolyte and to a method for the electrolytic deposition of silver coatings and silver alloy coatings. The electrolyte according to the invention is cyanide-free, storage-stable and ensures the deposition of high-gloss, brilliant and white silver and silver alloy layers for technical and decorative applications.

Electrolyte for the cyanide-free deposition of silver

The present invention relates to an electrolyte and to a method for the electrolytic deposition of silver-rich silver-palladium alloys which to a minor degree also include selenium and/or tellurium. The electrolyte of the invention allows uniform deposition of such an alloy on conductive surfaces across a wide range of current densities.

Electrolyte for the electrolytic deposition of silver-palladium alloys and method for deposition thereof

The present invention relates to an electrolyte for the electrochemical deposition of palladium or palladium alloys on metallic or conductive substrates. The invention likewise relates to a corresponding electroplating process using this electrolyte and specific palladium salts which can be advantageously used in this process.

Pd and Pd-Ni electrolyte baths

The present invention relates to a process for preparing palladium complexes. In particular, the present invention relates to a process in which ammoniacal complexes of palladium (hydrogen)carbonate are converted into complexes with oligoamine ligands.

Process for preparing complexes of palladium (hydrogen)carbonate with amine ligands

Consumer goods and industrial articles are electro-plated with bronze layers for decorative reasons and to protect them against corrosion. The electrolytes used hitherto for producing decorative bronze layers are either cyanide-containing or, as in the case of baths based on organosulphonic acids, highly corrosive or have, as in the case of cyanide-free baths based on diphosphoric acid, unsatisfactory long-term stabilities. Electrolytes which are used for applying solderable bronze layers in the electronics industry usually contain toxic or very toxic thio compounds. The present invention provides a non-toxic electrolyte which displays long-term stability for the electrolytic deposition of decorative bronze layers and a corresponding process for the application of such decorative bronze layers to consumer goods and industrial articles.

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Schwaebisch Gmuend, Germany

Sascha Berger