Method for passivating an aluminum surface provided with a flux
AssigneeMahle International GmbH
InventorsPeter Englert, Hans Koch, Oliver Mamber, Bertram Schoen
Life of this patent
Estimating the term…
Abstract
A method is provided for passivating an aluminum surface. According to the method, the aluminum surface is provided with a flux. A passivation solution is subsequently applied to the aluminum surface, such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux.
Claims18
A method for passivating an aluminum surface provided with a flux, the method comprising:
- (a) providing the aluminum surface provided with the flux;
- and
- (b) applying a passivation solution to the aluminum surface provided in step (a), such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux,
- wherein the passivation solution applied in step (b) is produced by mixing a zirconium solution with a water glass dispersion,
- wherein the passivation solution is a zirconium-silicate solution that contains 0.1-5 g/L of zirconium silicate, and
- wherein the water glass dispersion contains water glass with a concentration of 5 to 25%.
A method for passivating an aluminum surface provided with a flux, the method comprising:
- (a) providing the aluminum surface provided with the flux;
- and
- (b) applying a passivation solution to the aluminum surface provided in step (a), such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux,
- wherein the passivation solution applied in step (b) is produced by mixing a zirconium solution with a water glass dispersion,
- wherein the water glass dispersion contains water glass with a concentration of 5 to 25%.
A method for passivating an aluminum surface provided with a flux, the method comprising:
- (a) providing the aluminum surface provided with the flux;
- and
- (b) applying a passivation solution to the aluminum surface provided in step (a), such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux,
- wherein the passivation solution applied in step (b) contains polyurethane dispersions and/or ammonium vanadates, and
- wherein the passivation solution further contains a water glass dispersion.
A method for passivating an aluminum surface provided with a flux, the method comprising:
- (a) providing the aluminum surface provided with the flux;
- and
- (b) applying a passivation solution to the aluminum surface provided in step (a), such that a passivation layer is created by reaction of the passivation solution with the aluminum surface, which is provided with the flux,
- wherein the passivation solution contains 5 to 30 grams of tartaric acid per liter of passivation solution, and
- wherein the passivation solution further contains a water glass dispersion.
Dependencies are inferred from the claim text.