C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01) C08G 14/06 (2006.01) C09D 5/08 (2006.01)
Patent
CA 2485124
In at least one aspect, the invention relates to an entirely or substantially chromium-free conversion coating composition and process for conversion coating metal surfaces that provides corrosion resistance. In at least another aspect, the present invention relates to an article having a metal surface that is at least partially coated with an entirely or substantially chromium- free conversion coating that provides corrosion resistance. In certain embodiments, the conversion coating composition comprises water and (A) dissolved fluorometallate anions selected from the group consisting of TiF6-2, ZrF6-2, HfF6-2, SiF6-2, A1F6-3, GeF6-2, SnF6-2, BF4-, and mixtures thereof and (B) a water-soluble polymer which is a Mannich adduct of poly(4-vinyl phenol) and N-methyl ethanolamine. In other embodiments, the composition also comprises (C) a water-soluble polymer which is a Mannich adduct of poly(4- vinyl phenol) and N-methyl glucamine.
Au moins selon un aspect, l'invention concerne une composition de revêtement de conversion sensiblement dépourvue de chrome et un procédé de revêtement de conversion de surfaces métalliques assurant une résistance à la corrosion. Selon au moins un autre aspect, l'invention concerne un article à surface métallique au moins partiellement revêtue par revêtement de conversion entièrement ou sensiblement dépourvu de chrome assurant une résistance à la corrosion. Selon certaines variantes, ladite composition comprend de l'eau et (A) des anions fluorométallate appartenant au groupe constitué de TiF¿6??-2¿, ZrF¿6??-2¿, HfF¿6??-2¿, SiF¿6??-2¿, A1F¿6??-3¿, GeF¿6??-2¿, SnF¿6??-2¿, BF¿4??-¿, y compris leurs mélanges, et (B) un polymère hydrosoluble qui est un produit de réaction d'addition de Mannich de poly(4-vinyl phénol) et de N-méthyl éthanolamine. Selon d'autres variantes, la composition comprend aussi (C) un polymère hydrosoluble qui est un produit de réaction d'addition de Mannich de poly(4-vinyl phénol) et de N-méthyl glucamine.
Dolan Shawn E.
Liu Jianping
Scalera Patrick A.
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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