C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/42 (2006.01) B05D 3/10 (2006.01) B05D 7/16 (2006.01) C04B 28/34 (2006.01) C04B 41/52 (2006.01) C23C 22/44 (2006.01)
Patent
CA 2242995
Zinciferous and/or aluminiferous metal surfaces can be passivated by treatment with a chromium-free aqueous solution of phosphoric acid and molybdenum that is at least partially in a valence state lower than +6, to produce, especially with an acrylic overcoating, a surface as resistant to corrosion as the surface of the same substrate after passivation with conventional liquid compositions that contain hexavalent chromium.
Il est possible de passiver des surfaces métalliques zincifères et/ou alumineuses par traitement à l'aide d'une solution aqueuse, exempte de chrome, à base d'acide phosphorique et de molybdène dont une partie au moins possède une valence inférieure à +6, afin d'obtenir, avec une couche acrylique protectrice notamment, une surface aussi résistante à la corrosion que l'est la surface du même substrat après passivation avec des compositions liquides classiques contenant du chrome hexavalent.
Henkel Corporation
Henkel Kommanditgesellschaft Auf Aktien
Norton Rose Canada S.e.n.c.r.l.,s.r.l./llp
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