C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/05 (2006.01) C23C 22/06 (2006.01) C23C 22/12 (2006.01) C23C 22/34 (2006.01) C23C 22/44 (2006.01) C23C 22/56 (2006.01) C23C 22/00 (2006.01) C23C 22/30 (2006.01)
Patent
CA 2598390
Process of seal coating phosphoric acid anodized aluminum and aluminum alloys to improve the corrosion resistance and maintain the adhesive bonding properties. The process comprises post-treating phosphoric acid anodized aluminum and its alloys with an acidic aqueous solution comprising, per liter of acidic solution, from about 0.01 to 22 grams of a water soluble trivalent chromium compound, about 0.01 to 12 grams of an alkali metal hexafluorozirconate, about 0.0 to 12 grams of at least one alkali metal tetrafluorosilicate and/or an alkali metal hexafluoroborate, from about 0.001 to 10 grams of at least one water soluble divalent zinc compound and from 0.0 to 10 grams of a water soluble thickener and/or water soluble surfactant.
L'invention concerne un procédé de revêtement étanche à l'acide phosphorique d'aluminium anodisé et d'alliages d'aluminium destiné à améliorer la résistance à la corrosion et à maintenir les propriétés de fixation par collage. Le procédé consiste à post-traiter l'aluminium anodisé et ses alliages à l'acide phosphorique avec une solution aqueuse acide comprenant, par litre de solution acide, entre environ 0,01 et 22 grammes d'un composé de chrome trivalent hydrosoluble, environ 0,01 et 12 grammes d'un hexafluorozirconate de métal alcalin, environ 0,0 et 12 grammes d'au moins un tétrafluorosilicate de métal alcalin et/ou un hexafluoroborate de métal alcalin, entre environ 0,001 et 10 grammes d'au moins un composé de zinc divalent hydrosoluble et entre environ 0,0 et 10 grammes d'un épaississant hydrosoluble et/ou un tensioactif hydrosoluble.
Beck Erin N.
Matzdorf Craig A.
Nickerson William C. Jr.
Mcfadden Fincham
The United States Of America As Represented By The Secretary Of The Nav Y.
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