Atotech Deutschland Gmbh

Lukas Bedrnik

Heiko Brunner

Lars Kohlmann

Björn Dingwerth

Michal Kaczmarek

Zdenek Starkbaum

Ellen Habig

Antje Richter

Eric Sibürge

Kostantin Schwarz

Eric Siburge

Frantisek Haas

Nadine Lang

Zdenek Sazanov

Kostantin Thom

The present invention relates to an acidic zinc or zinc-nickel alloy plating bath composition comprising a source for zinc ions, optionally a source for nickel ions, a source for chloride ions and at least one dithiocarbamyl alkyl sulfonic acid or salt thereof. Said plating bath composition and the corresponding plating method result in zinc or zinc-nickel alloy layers having an improved throwing power and thickness distribution, particularly when plating substrates having a complex shape and/or in rack-and-barrel plating.

Acidic zinc and zinc nickel alloy plating bath composition and electroplating method

Additives for electrolyte baths for the electrodeposition of zinc or zinc alloy layer are described. The additives are polymers with terminal amino groups. These polymers are obtainable by reaction of at least one diamino compound (having two tertiary amino groups) with at least one di(pseudo)halogen compound, wherein the diamino compound is used in stoichiometric excess. The additives effect, in particular, a very little formation of bubbles and only few burnings as well as a uniform distribution of layer thickness in the electrodeposition of zinc or zinc alloy layers.

Polymers having terminal amino groups and use thereof as additives for zinc and zinc alloy electrodeposition baths

The invention relates to chromium- and cobalt-free treatment solutions for producing black coatings which afford corrosion protection. The treatment solution of the invention contains oxo cations or complex halogen ions or mixtures of oxo cations and complex halogen ions, an oxidant and an organic sulphur compound.

Treatment solution for producing chrome and cobalt-free black conversion coatings

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Tanvald, Czechia

Lukas Bedrnik