Metal material with a bismuth film attached and method for...

C - Chemistry – Metallurgy – 25 – D

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C25D 13/20 (2006.01) C23C 18/31 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2725108

Provided is a metal material with a bismuth film attached, which has excellent coating properties, corrosion resistance and paint film adhesion, and which can be produced with little impact on the environment. The metal material with a bismuth film attached has a layer containing bismuth on at least part of the surface of the metal material, the numerical proportion of bismuth atoms at the surface layer of said metal material with a bismuth film attached being 10% or above.

L'invention porte sur un matériau en métal avec un film de bismuth fixé à celui-ci, qui a d'excellentes propriétés de revêtement, de résistance à la corrosion et d'adhérence d'un film de peinture et qui peut être fabriqué avec un faible impact sur l'environnement. Le matériau en métal avec un film de bismuth fixé à celui-ci a une couche contenant du bismuth sur au moins une partie de la surface du matériau en métal, la proportion en nombre des atomes de bismuth au niveau de la couche de surface dudit matériau en métal avec un film de bismuth fixé à celui-ci étant supérieure ou égale à 10 %.

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