C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01) C23C 22/83 (2006.01)
Patent
CA 2651476
The invention concerns a method for forming a coloured coating on a metallic surface by contacting the surface of a metallic coil or of a metallic part with an aqueous acidic composition on the base of a source of titanium and at least one complex fluoride and of at least one modified tannin compound, of at least one other polyphenolic compound, of at least one reaction product of these e.g. with titanium or any combination thereof, whereby a coating is generated with the aqueous acidic composition having a well visible intensive colour.
L'invention concerne un procédé de formation d'un revêtement coloré sur une surface métallique par mise en contact de la surface d'une bobine métallique ou d'un élément métallique avec une composition acide aqueuse à base d'une source de titane et d'au moins un fluorure complexe et d'au moins un composé de tannin modifié, d'au moins un autre composé polyphénolique, d'au moins un produit de réaction de ces composés, p. ex. avec du titane ou toute combinaison du titane, un revêtement étant généré avec la composition aqueuse acide ayant une couleur intensive bien visible.
Falcone Franco
Lampreda Brunetta
Ponzellini Roberto
Porro Stefano
Chemetall Gmbh
Robic
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