Metal treatment to form a surface layer

Details Metal treatment to form a surface layer Metal treatment to form a surface layer

C - Chemistry, Metallurgy

25

D

C25D 11/26 (2006.01) A61L 27/04 (2006.01)

Patent

CA 2756653

A metal object is treated to form an integral surface layer by: (a) immersing the metal object in an anodising electrolyte, and passivating the metal to form an anodised layer on the metal object; (b) continuing the application of a potential to modify the surface layer; (c) then treating the metal object with a chemical reducing agent so a hydrous metal oxide is formed; and (d) then contacting the metal object with a solution containing a biocidal material so as to incorporate biocidal material into the surface layer.

La présente invention concerne un objet métallique traité pour former une couche superficielle intégrale par: (a) l'immersion de l'objet métallique dans un électrolyte anodisant, et la passivation du métal pour former une couche anodisée sur l'objet métallique; (b) la poursuite de l'application d'un potentiel pour modifier la couche superficielle; (c) le traitement de l'objet métallique avec un agent de réduction chimique pour former un oxyde métallique hydraté; et (d) la mise en contact de l'objet métallique avec une solution contenant un matériau biocide en vue d'incorporer le matériau biocide dans la couche superficielle.

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