Composition and method for inhibiting corrosion

Patent metadata

Field	Value
Publication number	US-10519322-B2
Application number	US-201615231977-A
Country	US
Kind code	B2
Filing date	Aug 9, 2016
Priority date	Jan 3, 2014
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A corrosion inhibiting composition including a liquid carrier having a surface tension of at most about 35 dynes/cm and an electrically conductive nanomaterial dispersed in the carrier.

First claim

What is claimed is:

1. A method for inhibiting corrosion of an electroplated structure comprising:
applying to said electroplated structure a composition comprising:
a liquid carrier having a surface tension of at most about 35 dynes/cm; and
an electrically conductive nanomaterial dispersed in said liquid carrier, wherein a weight ratio of said liquid carrier to said electrically conductive nanomaterial ranges from about 120:1 to about 30:1,
wherein said electroplated structure comprises a metallic substrate and electroplating directly on said metallic substrate, said electroplating defining an external surface and said electroplating comprising microcracks, and wherein said applying occurs for a duration of time such that at least a portion of said electrically conductive nanomaterial is received in said microcracks; and

removing said composition from said external surface of said electroplating while leaving said electrically conductive nanomaterial within said microcracks.

2. The method of claim 1 wherein said electroplating comprises at least one of chromium and nickel.

3. The method of claim 1 wherein said applying step comprising brushing said composition onto said electroplated structure.

4. The method of claim 1 wherein said removing comprises wiping.

5. The method of claim 1 wherein said removing step comprises washing.

6. The method of claim 1 wherein said removing step is performed after expiration of a dwell time of at least 5 minutes.

7. The method of claim 6 wherein said dwell time is at least 60 minutes.

8. The method of claim 6 wherein the dwell time is at least 30 minutes.

9. The method of claim 1 further comprising drying said composition.

10. The method of claim 1 wherein said electrically conductive nanomaterial comprises at least one of carbon nanoplatelets, graphene nanoplatelets, carbon nanotubes and carbon nanorods.

11. The method of claim 1 wherein said surface tension is at most about 30 dynes/cm.

12. The method of claim 1 wherein said surface tension is at most about 25 dynes/cm.

13. The method of claim 1 wherein at least a portion of said electrically conductive nanomaterial has at least one dimension ranging from about 1 to about 500 nanometers.

14. The method of claim 1 wherein at least a portion of said electrically conductive nanomaterial has at least one dimension ranging from about 1 to about 100 nanometers.

15. The method of claim 1 wherein at least a portion of said electrically conductive nanomaterial has at least one dimension ranging from about 1 to about 10 nanometers.

16. The method of claim 1 wherein said electrically conductive nanomaterial comprises graphene nanoplatelets.

17. The method of claim 1 wherein said electrically conductive nanomaterial comprises carbon nanotubes.

18. The method of claim 1 wherein a weight ratio of said liquid carrier to said electrically conductive nanomaterial ranges from about 100:1 to about 50:1.

19. The method of claim 1 wherein said weight ratio ranges from about 80:1 to about 60:1.

20. The method of claim 1 wherein said composition further comprises a dye.

Assignees

• Boeing Co

Inventors

• Lawless Lawrence M
• Griffin Bruce M
• Scott Craig W

Classifications

• C09D7/61

  inorganic · CPC title

• B05D1/28

  performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers · CPC title

• C09D5/082 Primary

  characterised by the anti-corrosive pigment · CPC title

• C25D5/48

  After-treatment of electroplated surfaces · CPC title

• B05D3/12

  by mechanical means · CPC title