Porous anodized aluminum surfaces sealed with diamond-like carbon coatings

• US 6,001,481 A
• Filed: 02/19/1998
• Issued: 12/14/1999
• Est. Priority Date: 03/08/1995
• Status: Expired due to Term

• Current Assignee: Southwest Research Institute
• Original Assignee: Southwest Research Institute
• Inventors: Lukezich, Stephen J., Dearnaley, Geoffrey
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US09/026,451
• Time in Patent Office: 663 Days
• Field of Search: 428/408, 428/457, 428/469, 428/446, 428/312.2, 428/312.8, 428/318.4, 428/319.1
• US Class Current: 428/408
• CPC Class Codes: C25D 11/18 After-treatment, e.g. pore-sealing
• CPC Class Codes: Y10T 428/249967 Inorganic matrix in void-containing component
• CPC Class Codes: Y10T 428/24997 Of metal-containing material
• CPC Class Codes: Y10T 428/249987 With nonvoid component of specified composition
• CPC Class Codes: Y10T 428/24999 Inorganic
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

A component comprising an anodized aluminum surface comprising a diamond-like carbon sealant. In a preferred embodiment, the diamond-like carbon sealant substantially fills pores in the anodized aluminum surface, and the pores are substantially free of gas. The anodized aluminum surface and sealant form an interface which preferably is substantially free of imperfections attributable to water molecules remaining adsorbed to the surface during application of said sealant.

Claims

1. An aluminum or aluminum alloy component comprising a surface converted to anodized aluminum, said anodized aluminum surface further comprising pores filled with a substance consisting essentially of a diamond like carbon sealant.

2. The component of claim 1 wherein said diamond-like carbon sealant comprises materials selected from the group consisting of carbonaceous materials, silicaceous materials, and mixtures thereof.

3. The component of claim 2 wherein said surface comprises pores substantially filled with said sealant.

4. The component of claim 3 wherein said pores are substantially free of gas.

5. The component of claim 4 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections.

6. The component of claim 3 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.

7. The component of claim 2 wherein said surf ace comprises pores which are substantially free of gas.

8. The component of claim 7 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.

9. The component of claim 2 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.

10. An aluminum or aluminum alloy component comprising a surface converted to anodized aluminum, said anodized aluminum surface comprising pores substantially filled with a substance consisting essentially of diamond-like carbon sealant.

11. The component of claim 10 wherein said pores are substantially free of gas.

12. The component of claim 11 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.

13. An aluminum or aluminum alloy component comprising a surface converted to anodized aluminum, said anodized aluminum surface comprising pores which are substantially free of materials other than a diamond-like carbon sealant .

14. The component of claim 13 wherein said sealant forms an interface with said anodized aluminum surface, and said interface is substantially free of imperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.

15. An aluminum or aluminum alloy component comprising:

a surface converted to anodized aluminum, said anodized aluminum surface comprising pores substantially filled with a diamond-like carbon sealant;

an interface between said anodized aluminum surface and said sealant, said interface being substantially free of unperfections attributable to water molecules remaining adsorbed to said surface during application of said sealant.