Method for creating a corrosion-resistant aluminum surface
First Claim
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1. A method for treating the surface of an aluminum-based material so as to make the surface resistant to corrosion, comprising the steps of:
- (a) contacting the surface with an aqueous cerium non-halide solution for at least about 1 hour, the cerium non-halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C.; and
(b) contacting the metal surface from step (a) with an aqueous solution consisting essentially of a cerium halide for at least about 1 hour, the cerium halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C.
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Abstract
A method for treating the surface of an aluminum-based material so as to make the surface resistant to corrosion includes the steps of contacting the surface with an aqueous cerium non-halide solution and then contacting the surface with an aqueous cerium halide solution. These steps may optionally be followed by a step of positively charging the metal surface while in contact with an aqueous molybdenum solution.
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Citations
42 Claims
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1. A method for treating the surface of an aluminum-based material so as to make the surface resistant to corrosion, comprising the steps of:
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(a) contacting the surface with an aqueous cerium non-halide solution for at least about 1 hour, the cerium non-halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C.; and(b) contacting the metal surface from step (a) with an aqueous solution consisting essentially of a cerium halide for at least about 1 hour, the cerium halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 40, 41, 42)
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22. A method for treating a surface of an aluminum-based material so as to make the surface resistant to corrosion, comprising the steps of:
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(a) contacting the surface with an aqueous cerium non-halide solution for at least about 1 hours, the cerium non-halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C.;(b) contacting the surface from step (a) with an aqueous solution consisting essentially of a cerium halide for at least about 1 hour, the cerium halide solution having a pH of between about 4 and about 7 and being at a temperature of at least about 80°
C.; and(c) positively charging the metal surface from step (b) while contacting the surface with an aqueous molybdenum solution. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification