Atotech Deutschland Gmbh

Christina Pfirrmann

Philipp Wachter

Berkem Özkaya

Nancy Born

Philip Hartmann

Stefan Kretschmer

Juan-Carlos Umaran

A method for post-treatment of a chromium finish surface to improve corrosion resistance comprising a) providing a substrate having a chromium finish surface, and at least one intermediate layer between the chromium finish surface and the substrate, selected from the group consisting of nickel, nickel alloys, copper and copper alloys, wherein the chromium finish surface is a surface of a trivalent chromium plated layer, obtained by electroplating the substrate, having the at least one intermediate layer, in a plating bath, the plating bath comprising chromium (III) ions; b) contacting the chromium finish surface with an aqueous solution, comprising a permanganate, at least one compound which is selected from a phosphorus-oxygen compound, a hydroxide, a nitrate, a borate, boric acid, a silicate, or a mixture of two or more of these compounds; c) forming a transparent corrosion protection layer onto the chromium finish surface during step b.

Method for treatment of a chromium finish surface

The present invention relates to a plating composition for electrolytic copper deposition, comprising copper ions, halide ions and at least one acid, at least one benzothiazole compound, at least one phenazine dye and at least one ethanediamine derivative. The present invention further concerns the use of above plating composition and a method for electrolytically depositing a copper or copper alloy layer onto at least one surface of a substrate.

Plating compositions for electrolytic copper deposition, its use and a method for electrolytically depositing a copper or copper alloy layer onto at least one surface of a substrate

A method for electrolytically passivating an outermost chromium or chromium alloy layer to increase corrosion resistance thereof, including steps of

Method for electrolytically passivating an outermost chromium or outermost chromium alloy layer to increase corrosion resistance thereof

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 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.

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Berlin, Germany

Christina Pfirrmann