US3808111A - Dry lubricant coated article - Google Patents
Dry lubricant coated article Download PDFInfo
- Publication number
- US3808111A US3808111A US00327549A US32754973A US3808111A US 3808111 A US3808111 A US 3808111A US 00327549 A US00327549 A US 00327549A US 32754973 A US32754973 A US 32754973A US 3808111 A US3808111 A US 3808111A
- Authority
- US
- United States
- Prior art keywords
- particles
- oxide
- solid lubricant
- base metal
- aluminum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
Definitions
- T QABSTRACT or THE DISCLOSURE Am'ember of a' base metal such as aluminum, magnei'siu'r'n, titanium or tin is electrolytically anodized while simultaneously electrophoretically depositing solid-lubri- 'c'antparticles of colloidal size, so as to produce a lubricating coating tightly bonded to the surface of the member with the particles being distributed throughout the thickness of an oxide on the surface and being locked .i'nplac'e within randomly oriented interstices within the 'oxide'pPreferably, the solidlubricant particles are of Teflon and the base metal is aluminum, but various other solid lubricant particles and base metals may be used.
- the invention relates to a dry lubricant coatedarticle. More particularly the invention relates to incorporating particles of a solid lubricant into the anodized surface of a metal to form adry lubricant coating.
- An object of the invention is to provide a strongly ad herent dry lubricant coating.
- a further object is to provide a method of quickly'and economically producing an anodized metal surface having superior lubricating qualities to that of an ordinary anodized surface.
- Another pbject is to provide a method of producing a dry lubricant comprising an anodized metal surface containing particles of a fluorocarbon polymer.
- an anodizable metal such as aluminum, titanium, tin or magnesium is electrolytically anodized as is well known to the art and while the anodization is taking place there is electrophoretically deposited on the metal particles of a solid lubricant.
- This simultaneous electrolytic growth of oxide and electrophoretic deposition of a lubricating media is accomplished by incorporating in the electrolyte being used for the anodization a negatively charged particle of a solid lubricant.
- the negatively charged particles of solid lubricant will migrate by means of the electric current induced in the bath to the anode and will be commingled (mingled) with the oxide coating during its formation.
- the particles are substantially uniformly distributed throughout the thickness of said oxide and are locked in place with randomly oriented interstices within said oxide to form with the oxide a lubricating coating tightly bonded to the surface of the base metal. This gives an extremely adherent low coeflicient of friction coating useful as a bearing surface and for other uses of dry lubricants.
- the preferred metals used for simultaneous anodization and electrophoretic-deposition.of solid particles are aluminum, titanium, magnesium and the alloys containing a major portion. of such metals.
- the oxide coating produced is.better suited for the commingling (mingling) with solid lubricants such as fluorocarbon polymers, and
- alumina-tungsten disulphide, polyethylene, and fluorocarbon polymers can be used.
- the fluorocarbon polymers are preferred, particularly the completely .fluorinated fluorocarbon polymers, of which the best appears to be tetrafluoroethylene.
- the suitable fluorocarbon polymers include polytetrafluoroethylene, poly- EXAMPLE I An aluminum sheet is made the anode. The cathode is lead or stainless steel.
- the electrolyte consists of sulfuric acidv (10 fluid ounces per gallon), oxalic acid (2 40 ounces per gallon), an aqueous suspension of negative charged colloidal particles of polytetrafluoroethylene containing 0.5 percent by weight TFE (Teflon suspension N0. 3170) acidulated with 5 percent sulfuric acid, the ingredients being merged in water to a volume of two gallons.
- the electrolyte was contained in a glass tank and maintained at a temperature of 25 95 F. during the operation.
- the current density used was 10-36 amperes per square foot.
- the voltage was 10-75 volts. Vigorous agitation of the electrolyte was maintained.
- the time of operation was 15 to 60 minutes.
- the coated plate produced by the above example had a coating of mixed aluminum oxide and particles of polytetrafluoroethylene of 0.002-0.0025 inch thickness.
- the resultant oxide has at least a portion of the particle of lubricant deposited in some interstices below the bearing or outer surface of the oxide with these interstices not normally accessible by direct treatment of the bearing surface with similarly sized particles of the lubricant I
- the above procedure of Example I may be'suitable for other anodizable metals including titanium and magnesium.
- An article comprising a member of a base metal, an oxide of said base metal and of substantial thickness anodized on a surface of said member and including an upper surface opposite said member, and solid lubricant particles mingled with said oxide, said particles being substantially uniformly distributed throughout the thickness of said oxide and being locked in place within randomly oriented interstices within said oxide to form with said oxide a lubricating coating tightly bonded to said surface, at least a portion of said particles being deposited below said upper surface during formation of said oxide by anodizing.
- An'article comprising a member of a base metal, an oxide of said base metal and of substantial thickness anodized on a surface of said member, and including an upper surface opposite said member, and solid lubricant particles mingled with said oxide, said particles being substantially distributed throughout said oxide and being locked in place within randomly oriented interstices within said oxide to form with said oxide a lubricating coating tightly bonded to said surface, at least a'portion of said particles being electrophoretically deposited. below said upper surface during formation of said'ox'ide by anodizing.
Abstract
Description
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00327549A US3808111A (en) | 1970-03-04 | 1973-01-26 | Dry lubricant coated article |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87955170A | 1970-03-04 | 1970-03-04 | |
US00327549A US3808111A (en) | 1970-03-04 | 1973-01-26 | Dry lubricant coated article |
Publications (1)
Publication Number | Publication Date |
---|---|
US3808111A true US3808111A (en) | 1974-04-30 |
Family
ID=26985931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00327549A Expired - Lifetime US3808111A (en) | 1970-03-04 | 1973-01-26 | Dry lubricant coated article |
Country Status (1)
Country | Link |
---|---|
US (1) | US3808111A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028492A (en) * | 1990-03-13 | 1991-07-02 | Olin Corporation | Composite coating for electrical connectors |
US5141702A (en) * | 1990-03-13 | 1992-08-25 | Olin Corporation | Method of making coated electrical connectors |
-
1973
- 1973-01-26 US US00327549A patent/US3808111A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028492A (en) * | 1990-03-13 | 1991-07-02 | Olin Corporation | Composite coating for electrical connectors |
US5141702A (en) * | 1990-03-13 | 1992-08-25 | Olin Corporation | Method of making coated electrical connectors |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALLIED CORPORATION COLUMBIA ROAD AND PARK AVENUE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BUNKER RAMO CORPORATION A CORP. OF DE;REEL/FRAME:004149/0365 Effective date: 19820922 |
|
AS | Assignment |
Owner name: CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENC Free format text: SECURITY INTEREST;ASSIGNOR:AMPHENOL CORPORATION;REEL/FRAME:004879/0030 Effective date: 19870515 |
|
AS | Assignment |
Owner name: AMPHENOL CORPORATION, LISLE, ILLINOIS A CORP. OF D Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850 Effective date: 19870602 Owner name: AMPHENOL CORPORATION, A CORP. OF DE, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850 Effective date: 19870602 |
|
AS | Assignment |
Owner name: AMPHENOL CORPORATION A CORP. OF DELAWARE Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:006147/0887 Effective date: 19911114 |