Metal-surface-treating composition and surface-treated metal...

Details Metal-surface-treating composition and surface-treated metal... Metal-surface-treating composition and surface-treated metal...

C - Chemistry, Metallurgy

23

C

C23C 22/07 (2006.01) C23C 22/17 (2006.01) C23C 22/18 (2006.01) C23C 22/20 (2006.01) C23C 22/22 (2006.01) C23C 22/56 (2006.01)

Patent

CA 2355855

This application provides a metal-surface-treating composition comprising metal ions of A1, Mg, and Mn, a water-soluble organic resin, an acid, and water; and a surface-treated metal material which is treated by using the composition. The composition is chromium free and the resulting surface-treated metal material does not inflict water pollution by chromium. Moreover, the surface-treated metal material exhibits both superior conductivity and corrosion resistance and can be applied to wide variety of uses, replacing conventional chromate-treated steel sheets.

La présente invention concerne une composition pour traitement de surface de métal qui comprend un ion aluminium, un ion magnésium, un ion manganèse, une résine organique hydrosoluble, un acide et de l'eau. L'invention concerne également un matériau métallique à surface traitée qui a été traité avec la composition. Le matériau métallique à surface traitée ainsi obtenu, qui ne présente aucun risque de contamination des eaux par le chrome étant donné que la composition est exempte de chrome, se distingue également par sa bonne conductivité électrique et sa résistance à la corrosion. Il en résulte que ce matériau métallique convient à une grande diversité d'application en remplacement des tôles d'acier et analogues conventionnelles traitées aux chromates.

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