C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 11/00 (2006.01) C23C 22/34 (2006.01) C23C 22/40 (2006.01) C23C 22/68 (2006.01) C23C 22/83 (2006.01) C23F 11/18 (2006.01)
Patent
CA 2290495
The corrosion resistance of an article having a surface with a primary inorganic coating, such as a conversion coating, over a metal substrate can be improved by treatment of the primary coating with an aqueous liquid sealing composition comprising lithium cations and vanadate anions. This treatment is particularly advantageous for primary coatings formed on aluminum alloys by treating them with a conversion coating forming aqueous composition made by reacting cobalt(II) cations, acetate ions, hydroxyalkyl amines, and peroxides in aqueous solution.
Il est possible d'améliorer la résistance à la corrosion d'un article pourvu d'un revêtement inorganique primaire, notamment de conversion, sur un substrat métallique. Le revêtement primaire a été traité avec une composition d'étanchéité aqueuse et liquide comprenant des cations de lithium et des anions de vanadium. Ce traitement convient particulièrement pour les revêtements primaires appliqués sur des alliages d'aluminium, car il permet de traiter ces revêtements par une couche de conversion formant une composition aqueuse issue de la réaction, dans une solution aqueuse, de cations de cobalt(II), d'ions d'acétate, d'hydroxyalkyle amines et de peroxydes.
Henkel Corporation
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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