Atotech Deutschland Gmbh

Berkem Özkaya

Philipp Wachter

Christina Pfirrmann

Nancy Born

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

Method for increasing corrosion resistance of substrate including an outermost chromium alloy layer, including

Method for increasing corrosion resistance of a substrate comprising an outermost chromium alloy layer

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

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Berlin, Germany

Berkem Özkaya