C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 11/30 (2006.01) C25D 11/36 (2006.01)
Patent
CA 2556722
A method of treating metallic workpieces with an anodizing solution, compositions of the anodizing solution and the coatings prepared with this anodizing solution for anodizing metallic surfaces, especially surfaces of magnesium, magnesium alloys, aluminum and aluminum alloys, are disclosed. The compositions are basic aqueous solutions comprising a water~soluble inorganic hydroxide, phosphorus and oxygen containing anions, at least one surfactant and an alkaline buffer based on at least one alkaline hydrolyzed silane, on at least one alcohol showing at least one alkaline radical group or on a mixture of them.
Cette invention concerne un procédé de traitement de pièces métalliques au moyen d'une solution anodisante, les compositions de cette solution anodisante et les revêtements obtenus avec ladite solution pour l'anodisation de surfaces métalliques, en particulier de surfaces en magnésium, en alliages de magnésium, en aluminium et en alliages d'aluminium. Ces compositions sont constitués par des solutions aqueuses basiques comprenant un hydroxyde inorganique hydrosoluble et des anions contenant de l'oxygène, au moins un tensioactif et un tampon alcalin reposant sur au moins un silane hydrolysé alcalin, au moins un alcool possédant au moins un groupe radical alcalin ou un mélange de ces substances.
Chemetall Gmbh
Robic
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