C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01) C23C 22/50 (2006.01)
Patent
CA 2598397
Process of coating iron alloys to improve the corrosion resistance and adhesive bonding strengths. The process comprises treating the iron or iron alloys such as steel with an acidic aqueous solution comprising, per liter of solution, from about 0.01 to 22 grams of a water soluble trivalent chromium compound, about 0.01 to 12 grams of hexafluorozirconate, at least one tetrafluoroborate and/or hexafluorosilicate, at least one water soluble divalent zinc compound and from 0.0 to 10 grams of water soluble thickeners and/or water soluble surfactants.
L'invention concerne un procédé permettant de recouvrir des alliages de fer afin d'améliorer leur résistance à la corrosion et leurs forces de liaison par adhésion. Ledit procédé consiste à traiter le fer ou un alliage de fer, tel que l'acier, avec une solution aqueuse acide comprenant, par litre de solution, environ 0,01 à 22 grammes d'un composé de chrome trivalent soluble dans l'eau, environ 0,01 à 12 grammes d'hexafluorozirconate, au moins un tétrafluoroborate et/ou un hexafluorosilicate, au moins un composé de zinc divalent soluble dans l'eau, 0,0 à 10 grammes d'épaississants solubles dans l'eau et/ou des tensioactifs solubles dans l'eau.
Green James L.
Matzdorf Craig
Nickerson William C. Jr.
Schwartz Andrew S.
Mcfadden Fincham
The United States Of America As Represented By The Secretary Of The Nav Y.
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