In-situ surface treatment containment apparatus and method

• US 4,882,016 A
• Filed: 05/02/1988
• Issued: 11/21/1989
• Est. Priority Date: 05/02/1988
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Westerman, Everett A. Jr.
• Primary Examiner(s): Tufariello, T. M.
• Application Number:
  US07/189,423
• Time in Patent Office: 568 Days
• Field of Search: 204/15
• US Class Current: 205/88
• CPC Class Codes: C25D 11/005 Apparatus specially adapted for electrolytic conversion coating apparatus in general for electrolytic coating C25D17/00
• CPC Class Codes: C25D 11/04 of aluminium or alloys based thereon
• CPC Class Codes: C25D 17/004 Sealing devices
• CPC Class Codes: C25D 17/008 Current shielding devices
• CPC Class Codes: C25D 5/02 Electroplating of selected surface areas

Abstract

A method and apparatus for a containment for treating a surface, such as on an aircraft, in-situ. A treating compartment having a conductive screen and an insulating fiber member therein is held in place on the surface by a retaining membrane attached around the periphery of the treating compartment. The treating fluid is held in a separate container that is coupled to the treating compartment. A suction is placed on the treating compartment which pulls the membrane, screen and fiber against the surface and into contact with each other. The suction also pulls the treating fluid into the treating compartment. The fluid spreads evenly along the insulating member disposed between the screen and the surface under treatment. A voltage potential difference is placed between the conductive screen and the surface, causing current to run through the treating fluid to provide treatment of the surface. After the treatment is completed, the suction from the treating compartment is removed and the fluid returned to its container. The retaining membrane is removed and the entire apparatus removed from the surface.

Claims

1. The method of providing a containment for treating a surface in-situ, comprising:

attaching a moldable, sealing material to said surface;

attaching a treating membrane to said moldable sealing material to form a treating chamber, said treating chamber including a conductive screen and an insulating member disposed between said conductive screen and said surface;

creating a vacuum within said treating chamber; and

providing a fluid within said treating chamber, said vacuum causing said fluid to be distributed between said conductive screen and said surface.

2. The method according to claim 1 wherein said step of providing a fluid includes placing a sealed bag containing fluid within said treating chamber and creating an opening in said bag when said membrane is moved to provide said fluid supply.

3. The method according to claim 1 wherein said step of providing a fluid includes placing a sealed bag containing said fluid outside of said treating chamber and coupling said fluid to said treating chamber with a tubing.

4. The method of treating a surface in-situ, comprising:

coupling a retaining membrane to said surface with an airtight seal to create a retaining chamber;

coupling a treating membrane to said surface with an airtight seal to create a treating chamber, said treating chamber being surrounded at said surface by said retaining chamber, said treating chamber including a conductive screen and a fiber member disposed between said conductive screen and said surface;

removing air from said retaining membrane to create a suction force for retaining said treating membrane on said surface;

coupling a treating fluid to said treating chamber;

removing air from said treating chamber to create a suction force acting to draw said treating membrane toward said surface and also acting to draw said fluid into said treating chamber;

placing a voltage on said screen to create a voltage potential between said screen and said surface, causing current to flow through said treating fluid;

removing said voltage from said screen;

returning air to said treating chamber; and

returning air to said retaining chamber.

5. The method of providing a containment for treating a surface in-situ, comprising:

attaching a sealing material to said surface;

attaching a flexible membrane to said sealing material to form a treating chamber, said treating chamber including a conductive screen and an insulating member disposed between said conductive screen and said surface; and

disposing a fluid within said treating chamber disposed between said conductive screen and said surface.

6. The method according to claim 5 wherein said step of providing fluid within said treating chamber includes:

coupling a source of treating fluid to said treating chamber; and

placing a vacuum on said treating chamber for drawing said fluid into said treating chamber.

7. The method according to claim 5, further including the step of attaching a sealing material to said membrane and said surface after said membrane is attached to said sealing material.

8. The method according to claim 5, further including the steps of:

attaching a retaining chamber to said surface prior to attaching said treating membrane to said surface; and

coupling said treating membrane to said retaining chamber for holding said treating membrane in position on said surface.

9. The method according to claim 5 wherein said treating chamber is formed on an underside of a wing surface of an aircraft.

10. The method of treating a surface in-situ comprising:

coupling a treating membrane to said surface to be treated with an airtight seal to create a treating chamber, said treating chamber including a conductive screen and a fiber member disposed between said conductive screen and said surface;

coupling a source of treating fluid to said treating chamber;

creating a vacuum in said treating chamber to provide a suction force for drawing said treating fluid into said fiber member, said treating fluid being disposed between said conductive screen and said surface;

placing a voltage on said screen to create a voltage potential between said screen and said surface for causing current to flow through said treating fluid;

removing said voltage from said screen; and

releasing the vacuum on said treating chamber.

11. The method according to claim 10 wherein said step of coupling a treating membrane to said surface includes the steps of:

attaching a moldable, sealing material to said surface; and

attaching said treating membrane to said sealing material to couple said treating membrane to said surface for forming said treating chamber.

12. The method according to claim 10 wherein said treating chamber is formed on the underside of an aircraft surface.

13. The method according to claim 10 wherein said step of coupling a treating fluid to said treating chamber includes the steps of:

placing a sealed bag inside said treating chamber prior to said step of creating a vacuum in said treating chamber, said sealed bag having said treating fluid therein; and

opening said bag after said treating chamber is coupled to said surface for disposing said treating fluid in said fiber member.

14. The method according to claim 10 wherein said step of coupling a treating fluid to said treating chamber includes the steps of:

coupling a tubing to said treating chamber, said tubing extending from the interior of said treating chamber to a position exterior of said treating chamber; and

coupling a source of fluid to said tubing such that when a vacuum is created in said treating chamber, fluid is drawn from said fluid source, through said tubing and into said treating chamber.