C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 3/56 (2006.01)
Patent
CA 2372579
There is disclosed an electroplating bath for depositing zinc/manganese alloys on a substrate characterized in that it comprises an aqueous bath free or substantially free of ammonium halide and of fluoroborate which is made up from 10-150 g/l, alkali metal salt, 30-90 g/l boric acid, 10-200 g/l water soluble zinc salt, 10-50 g/l water soluble manganese salt, 60-140 g/l alkali metal gluconate or tartrate and a base e.g. an alkali metal hydroxide to bring the pH to the range 6.1-7.1. Passivates are also disclosed.
L'invention concerne un bain de galvanoplastie permettant le dépôt d'alliages zinc/manganèse sur un substrat. Ce procédé est caractérisé par un bain aqueux exempt ou sensiblement exempt d'halogénure d'ammonium et de fluoroborate, préparé avec 10-150 g/l. de sel de métal alcalin, 30-90 g/l d'acide borique, 10-200 g/l de sel de zinc soluble dans l'eau, 10-50 g/l de sel de manganèse soluble dans l'eau, 60-140 g/l de gluconate ou de tartrate de métal alcalin et une base, p. ex. un hydroxyde de métal alcalin permettant de régler le pH dans un intervalle de 6.1-7.1. L'invention concerne également des compositions de passivation.
Enthone Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Verberne Wilhemus Maria Johannes Cornelis
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