WO2005060497A2 - Improved rivet and coating technique - Google Patents

Improved rivet and coating technique Download PDF

Info

Publication number
WO2005060497A2
WO2005060497A2 PCT/US2004/039125 US2004039125W WO2005060497A2 WO 2005060497 A2 WO2005060497 A2 WO 2005060497A2 US 2004039125 W US2004039125 W US 2004039125W WO 2005060497 A2 WO2005060497 A2 WO 2005060497A2
Authority
WO
WIPO (PCT)
Prior art keywords
rivet
rivets
coating
shear strength
temperature
Prior art date
Application number
PCT/US2004/039125
Other languages
French (fr)
Other versions
WO2005060497A3 (en
Inventor
Robert E. Briley
Original Assignee
Innovative Coatings Technology Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Innovative Coatings Technology Corporation filed Critical Innovative Coatings Technology Corporation
Priority to EP04811785A priority Critical patent/EP1708847A4/en
Priority to BRPI0417768-1A priority patent/BRPI0417768A/en
Priority to CA 2550444 priority patent/CA2550444A1/en
Publication of WO2005060497A2 publication Critical patent/WO2005060497A2/en
Publication of WO2005060497A3 publication Critical patent/WO2005060497A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/06—Solid rivets made in one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
    • C09D5/084—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
    • C23C22/37—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2258/00—Small objects (e.g. screws)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B2019/045—Coated rivets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Definitions

  • This invention relates to coated aluminum or aluminum alloy rivets.
  • the coating is relatively thin, such as about 0.0002 to 0.0005 inch.
  • rivet coatings may be cured at a relatively low temperature, such as about 250°F. This has many advantages, including avoiding any impairment of the strength of the rivets. In addition it provides a somewhat thicker coating on the rivets so that the coating acts somewhat like a gasket, preventing the flow of water or the like past the rivet. More specifically, the coating is about 0.0007 to about 0.001 or 0.002 inch in thickness. In addition, the coating is softer and more resilient than prior coatings baked at high temperatures.
  • the coating may be somewhat similar to that disclosed in the coating for titanium rivets in the -351 and -587 patents, including a resin, solvents, a corrosion inhibitor, and an elasticizer. However, instead of baking at higher temperatures, and concurrently heat treating the rivet and curing the coating, the curing is accomplished at about 250°F, with previously heat treated aluminum or aluminum alloy rivets, so that the shear strength of the rivets is not impaired.
  • the rivets may be sandblasted, preferably with aluminum oxide, and treated with a solution such as alodine containing material such as chromic acid and a compound containing fluorine.
  • the rivets may be chromic acid anodized.
  • This type of treatment is known per se and is described, for example, in a text entitled “Coating and surface Treatment for Metals", by J. Edwards, ASM International, Finishing Publications, Ltd. In which see particularly page 37.
  • the aluminum alloy rivets may be initially heat treated. Subsequently, after any desired time interval, the rivets may be sandblasted and washed. Following drying, the rivets are coated with a coating including (1) solvents, (2) Resin, (3) a plasticizer and (4) a corrosion inhibitor. The coating is then cured at a temperature of between about 230°F and 290°F for between l A hour and IV2 hours preferably for about an hour.
  • the rivets are later employed in securing two work pieces together, with the thick coating, about 0.0007 to 0.001 or 0.002 inch thick, functioning somewhat like a gasket to seal the rivet hole.
  • Advantages of the present invention include (1) increased thickness of the coating; (2) no time constraints are required relative to the time of coating the rivets.
  • Figure 1 is a schematic showing of an aluminum alloy rivet with a coating on its surface.
  • FIG. 14 shows an aluminum alloy rivet with a coating 14 on its outer surface.
  • the rivet is initially heat treated to increase its shear strength, with the elevated temperatures and the time of heat treatment depending on the particular aluminum alloy which is employed.
  • the heat treated rivet may be stored for extended periods of time, or may be coated soon after heat treatment.
  • the aluminum alloy rivet often has a somewhat oxidized outer surface.
  • the rivets are sandblasted, preferably with aluminum oxide, and washed with an oxidation inhibiting solution, preferably Allodine®, a solution containing chromic acid and a fluorine compound.
  • an oxidation inhibiting solution preferably Allodine®, a solution containing chromic acid and a fluorine compound. This material is available from Henkel Surface Technologies, 32,100 Stephenson Highway, Madison Heights, Michigan, 48071.
  • the rivets are coated by spraying, dipping or other methods with a coating preferably containing the following:
  • the rivets are preferably cured at a temperature of about 250°F for one hour.
  • the temperature may be within the range of from 220°F and 290°F preferably between 240°F and 260°F, and the time of curing may be increased somewhat for lower temperatures and increased somewhat for higher temperatures but should preferably be between ⁇ hour and 1 V ⁇ hours.
  • the shear strength of the rivets may be impaired with temperatures above 300°F, so it is desirable to stay below this temperature.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

A previously heat treated aluminum alloy rivet is sand blasted with aluminum oxide, washed with a corrosion resistant solution, dried, and then a coating is applied to the rivet. The coating includes solvent, resin, plasticizer and a corrosion inhibitor. The coating is cured at an elevated temperature below 300°F, preferably in the order of 250°F for about an hour, or between one-half and one and one-half hours. The resultant rivet has a relative thick gasket-like coating about 0.0007 to about 0.001 or 0.002 inch thick, and retains its high shear strength resulting from the initial pre-coating heat treatment. As an alternative pre-treatment, the rivets may be chromic acid anodized.

Description

IMPROVED RIVET AND COATING TECHNIQUE FIELD OF THE INVENTION This invention relates to coated aluminum or aluminum alloy rivets.
BACKGROUND OF THE INVENTION It has previously been proposed to coat rivets for protection against corrosion and deterioration. A coating for titanium rivets is disclosed in U.S. Patent No. 3,979,351, granted September 7, 1976 and in related U.S. Patent No. 3,983,304, granted September 28, 1976. In the field of coated aluminum or aluminum alloy rivets, a number of prior patents disclose concurrently curing the coating and heat treating the aluminum alloy rivets. These include the following patents: U.S. Pat. No. 5,944,918, granted August 31, 1999; U.S. Pat. No. 5,858,133, granted January 12, 1999; U.S. Pat. No. 6,221,177 granted April 24, 2001; U.S. Pat. No. 6,274,200 granted August 14, 2001; and U.S. Pat. No. 6,403,230, granted June 11, 2002. Aluminum alloy rivets require special heat treating in order to increase their strength; and the foregoing patents discuss these required heat treatments in some depth. The specifications of these patents, which include discussions of aluminum alloy heat treating are hereby incorporated into this specification by reference.
It is noted, however, that once an aluminum alloy rivet has been heat treated, additional heating of the rivet to a temperature above about 300°F to cure a coating applied to the rivet, will impair the shear strength of the rivet.
It is further noted that, with the coatings disclosed in these patents, and the high temperatures used for concurrently both curing of the coating and heat treating of the rivets, the coating is relatively thin, such as about 0.0002 to 0.0005 inch.
SUMMARY OF THE INVENTION In accordance with the present invention it has been determined that rivet coatings may be cured at a relatively low temperature, such as about 250°F. This has many advantages, including avoiding any impairment of the strength of the rivets. In addition it provides a somewhat thicker coating on the rivets so that the coating acts somewhat like a gasket, preventing the flow of water or the like past the rivet. More specifically, the coating is about 0.0007 to about 0.001 or 0.002 inch in thickness. In addition, the coating is softer and more resilient than prior coatings baked at high temperatures.
The coating may be somewhat similar to that disclosed in the coating for titanium rivets in the -351 and -587 patents, including a resin, solvents, a corrosion inhibitor, and an elasticizer. However, instead of baking at higher temperatures, and concurrently heat treating the rivet and curing the coating, the curing is accomplished at about 250°F, with previously heat treated aluminum or aluminum alloy rivets, so that the shear strength of the rivets is not impaired.
In addition, as a pre-treatment, the rivets may be sandblasted, preferably with aluminum oxide, and treated with a solution such as alodine containing material such as chromic acid and a compound containing fluorine.
Instead of the pre-treatment outlined in the preceding paragraph, the rivets may be chromic acid anodized. This type of treatment is known per se and is described, for example, in a text entitled "Coating and surface Treatment for Metals", by J. Edwards, ASM International, Finishing Publications, Ltd. In which see particularly page 37.
In accordance with a specific method illustrating the principles of the invention, the aluminum alloy rivets may be initially heat treated. Subsequently, after any desired time interval, the rivets may be sandblasted and washed. Following drying, the rivets are coated with a coating including (1) solvents, (2) Resin, (3) a plasticizer and (4) a corrosion inhibitor. The coating is then cured at a temperature of between about 230°F and 290°F for between lA hour and IV2 hours preferably for about an hour. The rivets are later employed in securing two work pieces together, with the thick coating, about 0.0007 to 0.001 or 0.002 inch thick, functioning somewhat like a gasket to seal the rivet hole.
Advantages of the present invention include (1) increased thickness of the coating; (2) no time constraints are required relative to the time of coating the rivets.
Other objects, features and advantages of the invention will become apparent from a consideration of the following detailed description and from the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic showing of an aluminum alloy rivet with a coating on its surface.
DETAILED DESCRIPTION OF THE INVENTION While the specification describes particular embodiments of the present invention, those of ordinary skill can devise variations of the present invention without departing from the inventive concept.
Referring more particularly to the single figure of the drawings, it shows an aluminum alloy rivet with a coating 14 on its outer surface. The rivet is initially heat treated to increase its shear strength, with the elevated temperatures and the time of heat treatment depending on the particular aluminum alloy which is employed. The heat treated rivet may be stored for extended periods of time, or may be coated soon after heat treatment.
The aluminum alloy rivet often has a somewhat oxidized outer surface. The rivets are sandblasted, preferably with aluminum oxide, and washed with an oxidation inhibiting solution, preferably Allodine®, a solution containing chromic acid and a fluorine compound. This material is available from Henkel Surface Technologies, 32,100 Stephenson Highway, Madison Heights, Michigan, 48071.
Following drying, the rivets are coated by spraying, dipping or other methods with a coating preferably containing the following:
Material Grams %
Solvents:
Methyl Ethyl Ketone (MEK) 1,250 g. 35 Ethyl Alcohol 1,250 g. 35 Corrosion Inhibitor:
Strontium Chromate 260 g. 7 Elasticizer:
Polyvinyl Butyral 60 g 2
Resin:
Phenol-Formaldehyde 752 g 21 Color (Optional):
Blue Dye 10 g Less than 1%
TOTAL 3,582 g
While the foregoing represents a preferred coating, it is to be understood that minor departures from the proportions, and the substitution of equivalent materials may be accomplished to achieve the objects of the invention.
Following coating, the rivets are preferably cured at a temperature of about 250°F for one hour. The temperature may be within the range of from 220°F and 290°F preferably between 240°F and 260°F, and the time of curing may be increased somewhat for lower temperatures and increased somewhat for higher temperatures but should preferably be between ¥ι hour and 1 Vτ hours. As noted above, the shear strength of the rivets may be impaired with temperatures above 300°F, so it is desirable to stay below this temperature.
Concerning the composition of the coating, the percentages set forth above are preferred, but variations are still operative. Thus, instead of the listed solvents, they may be replaced in whole or part with toluene or acetone, with the speed of drying being in the order of acetone, MEK, Ethyl alcohol and toluene. Thus by way of example and not of limitation, the amount of Ethyl alcohol may be reduced somewhat and some acetone added. Similarly, other equivalent materials may be substituted in whole or part for the corrosion inhibitor, the elasticizer and/or the resin. It is further noted that in some cases where the heat treated rivets are clean and unoxidized, the initial sand blasting step may not be needed. In closing, it is to be understood that the foregoing detailed description relates to the preferred method and coated rivet; and various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

WHAT IS CLAIMED IS:
1. A method comprising the steps of: heat treating aluminum alloy rivets to increase their shear strength; sand blasting the rivets with aluminum oxide; washing the rivets with a solution containing chromic acid and a fluorine compound; applying a coating of a solution of a solvent, a resin binder, strontium chromate and an elasticizer to the rivet; curing the coating at a temperature between about 230°F and 290°F for a time period of between about one half hour and one and one half hours to produce a gasket-like coating on the rivet having a thickness of about 0.0007 to about 0.001 inch; and riveting two workpieces together with the coating sealing the rivet, and with the rivet retaining its full heat-treated shear strength.
2. A method as defined in claim 1 wherein the rivets are cured at a temperature of between 240°F and 260°F.
3. A method as defined in claim 1 wherein the solvent is Methyl Ethyl Ketone and Ethyl alcohol, the elasticizer is Poly vinyl Butyral, the resin is a phenolic resin, and the corrosion inhibitor is Strontium chromate.
4. A method comprising the steps of: obtaining a supply of aluminum alloy rivets which have been heat treated to increase their shear strength; sand blasting the rivets; washing the rivets with a solution containing oxidation inhibiting material; applying a coating of a solution of a solvent, a resin binder, strontium chromate and an elasticizer to the rivet; and curing the coating at a temperature between about 230°F and 290°F for a time period of between about one half hour and one and one half hours to produce a gasket-like coating on the rivet having a thickness of about 0.0007 to about 0.002 inch; whereby the rivets retain their full heat treated shear strength, and seal the rivet holes when the rivets are riveted in place.
5. A method as defined in claim 4 wherein the rivets are cured at a temperature of between 240°F and 260°F.
6. A method as defined in claim 1 wherein the solvent is Methyl Ethyl Ketone and Ethyl alcohol, the elasticizer is Polyvinyl Butyral, the resin is a phenolic resin, and the corrosion inhibitor is strontium chromate.
7. A coated rivet made in accordance with the method of claim 4 said rivet being a heat treated aluminum alloy rivet with a gasket-like coating having a thickness of between about 0.0007 and 0.002 inch thick.
8. A method comprising the steps of: heat treating aluminum alloy rivets to increase their shear strength; applying a coating of a solution of a solvent, a resin binder, a chromate compound and an elasticizer to the rivet; curing the coating at a temperature between about 230°F and 290°F for a time period of between about one half hour and one and one half hours to produce a gasket-like coating on the rivet having a thickness of about 0.0007 to about 0.001 inch; and riveting two workpieces together with the coating sealing the rivet, and with the rivet retaining its full heat-treated shear strength.
9. A method as defined in claim 8 wherein the rivets are cured at a temperature of between 240°F and 260°F.
10. A method as defined in claim 8 wherein the solvent is Methyl Ethyl Ketone and Ethyl alcohol, the elasticizer is Polyvinyl Butyral, the resin is a phenolic resin, and the corrosion inhibitor is Strontium chromate.
11. A method comprising the steps of: obtaining a supply of aluminum alloy rivets which have been heat treated to increase their shear strength; applying a coating of a solution of a solvent, a resin binder, a corrosion inhibitor, and an elasticizer to the rivet; and curing the coating at a temperature between about 230°F and 290°F for a time period of between about one half hour and one and one half hours to produce a gasket-like coating on the rivet having a thickness of about 0.0007 to about 0.002 inch; whereby the rivets retain their full heat treated shear strength, and seal the rivet holes when the rivets are riveted in place.
12. A method as defined in claim 11 wherein the rivets are cured at a temperature of between 240°F and 260°F.
13. A method as defined in claim 11 wherein the solvent is Methyl Ethyl Ketone and Ethyl alcohol, the elasticizer is Polyvinyl Butyral, the resin is a phenolic resin, and the corrosion inhibitor is strontium chromate.
14. A coated rivet made in accordance with the method of claim 11 said rivet being a heat treated aluminum alloy rivet with a gasket-like coating having a thickness of between about 0.0007 and 0.0O2 inch.
15. A method comprising the steps of: obtaining a supply of aluminum alloy rivets which have been heat treated to increase their shear strength; , pre-treating the rivets to provide a clean surface free from oxidation or contamination; applying a coating of a solution of a solvent, a resin binder, a corrosion inhibitor, and an elasticizer to the rivet; and curing the coating at a temperature between about 230°F and 290°F for a time period of between about one half hour and one and one half hours to produce a gasket-like coating on the rivet having a thickness of about 0.0007 to about 0.002 inch; whereby the rivets retain their full heat treated shear strength, and seal the rivet holes when the rivets are riveted in place.
16. A method as defined in claim 15 wherein the rivets are cured at a temperature of between 240°F and 260°F.
17. A coated rivet made in accordance with the method of claim 11 said rivet being a heat treated aluminum alloy rivet with a gasket-like coating having a thickness of between about 0.0007 and 0.002 inch.
18. A method as defined in claim 15 wherein the pre-treating involves sand blasting the rivets and washing the rivets in an acid solution.
19. A method as defined in claim 15 wherein said pre-treatment involves chromic acid anodizing of the rivets.
PCT/US2004/039125 2003-12-16 2004-11-18 Improved rivet and coating technique WO2005060497A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04811785A EP1708847A4 (en) 2003-12-16 2004-11-18 Improved rivet and coating technique
BRPI0417768-1A BRPI0417768A (en) 2003-12-16 2004-11-18 improved rivet and coating technique
CA 2550444 CA2550444A1 (en) 2003-12-16 2004-11-18 Improved rivet and coating technique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/737,113 US20050129932A1 (en) 2003-12-16 2003-12-16 Rivet and coating technique
US10/737,113 2003-12-16

Publications (2)

Publication Number Publication Date
WO2005060497A2 true WO2005060497A2 (en) 2005-07-07
WO2005060497A3 WO2005060497A3 (en) 2005-09-29

Family

ID=34654031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/039125 WO2005060497A2 (en) 2003-12-16 2004-11-18 Improved rivet and coating technique

Country Status (5)

Country Link
US (1) US20050129932A1 (en)
EP (1) EP1708847A4 (en)
BR (1) BRPI0417768A (en)
CA (1) CA2550444A1 (en)
WO (1) WO2005060497A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7718553B2 (en) * 2006-09-21 2010-05-18 Asm Japan K.K. Method for forming insulation film having high density
WO2008077135A1 (en) * 2006-12-19 2008-06-26 Acme United Corporation Cutting instrument
US7781352B2 (en) * 2007-06-06 2010-08-24 Asm Japan K.K. Method for forming inorganic silazane-based dielectric film
US7651959B2 (en) 2007-12-03 2010-01-26 Asm Japan K.K. Method for forming silazane-based dielectric film
US7622369B1 (en) 2008-05-30 2009-11-24 Asm Japan K.K. Device isolation technology on semiconductor substrate
US8765233B2 (en) * 2008-12-09 2014-07-01 Asm Japan K.K. Method for forming low-carbon CVD film for filling trenches
CN102268663B (en) * 2010-06-07 2014-01-01 鞍钢股份有限公司 Surface stabilizing treatment agent for weathering resistant steel
CN116251726A (en) * 2022-12-09 2023-06-13 眉山中车紧固件科技有限公司 Fluorescent surface treatment method for short tail pulling rivet and rivet manufactured by same

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153702A (en) * 1935-05-22 1939-04-11 Rustless Iron And Steel Corp O Fastening device
US2858414A (en) * 1953-05-18 1958-10-28 Dash Edward Aluminum coated stud
US3841896A (en) * 1971-03-15 1974-10-15 Lockheed Aircraft Corp Corrosion inhibited, coated metal article
US3790355A (en) * 1971-11-18 1974-02-05 Empire Plating Co Coated metal article and method of coating
US3979351A (en) * 1973-01-26 1976-09-07 Hi-Shear Corporation Protective coating material
US3983304A (en) * 1973-09-19 1976-09-28 Hi-Shear Corporation Fastener with protective metal-organic base coating
JPS582596A (en) * 1981-06-30 1983-01-08 Nippon Parkerizing Co Ltd Surface treatment for heat exchanger made of aluminum
US5610215A (en) * 1990-04-03 1997-03-11 Gregory A. Konrad Aqueous emulsion-based coating compositions
US5149237A (en) * 1991-02-22 1992-09-22 Illinois Tool Works Inc. Coated metal fastener and coating composition therefor
US5564876A (en) * 1995-02-15 1996-10-15 Illinois Tool Works Inc. Corrosion-resistant, headed fastener, such as nail for exterior applications, and manufacturing method
EP0828863B2 (en) * 1995-05-01 2012-12-19 McDONNELL DOUGLAS CORPORATION Preparation of pre-coated aluminum alloy articles
US5614037A (en) * 1995-05-01 1997-03-25 Mcdonnell Douglas Corporation Method for preparing pre-coated aluminum articles and articles prepared thereby
US6488785B2 (en) * 1998-01-22 2002-12-03 Hirofumi Kishikawa Surface treated steel material
US6274200B1 (en) * 1998-09-11 2001-08-14 Boeing North American, Inc. Method for preparing pre-coated ferrous-alloy components and components prepared thereby
CA2279084C (en) * 1998-09-11 2013-12-03 Steven G. Keener Method for coating faying surfaces of aluminum-alloy components and faying surfaces coated thereby
US6171649B1 (en) * 1998-11-24 2001-01-09 The Boeing Company Method for preparing pre-coated aluminum-alloy components and components prepared thereby

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of EP1708847A4 *

Also Published As

Publication number Publication date
CA2550444A1 (en) 2005-07-07
WO2005060497A3 (en) 2005-09-29
US20050129932A1 (en) 2005-06-16
BRPI0417768A (en) 2007-04-17
EP1708847A2 (en) 2006-10-11
EP1708847A4 (en) 2007-07-25

Similar Documents

Publication Publication Date Title
EP0828863B1 (en) Preparation of pre-coated aluminum alloy articles
US5858133A (en) Method for preparing pre-coated aluminum alloy articles and articles prepared thereby
CA2279084C (en) Method for coating faying surfaces of aluminum-alloy components and faying surfaces coated thereby
US6274200B1 (en) Method for preparing pre-coated ferrous-alloy components and components prepared thereby
CA2890972C (en) Friction stir welded assembly and associated method
WO2005060497A2 (en) Improved rivet and coating technique
JP2005308220A (en) Fluoropolymer coated fastener insert with no chromate
CA3003023C (en) Process for adhering solid lubricant to surface of interference fit fastener
US7128949B2 (en) Surface pre-treatment method for pre-coated precipitation-hardenable stainless-steel ferrous-alloy components and components pre-coated thereby
USH1888H (en) Process for applying high application-temperature coating to heat-sensitive aluminum alloys
JP2000265282A (en) Precoated metallic sheet excellent in coating film adhesion and corrosion resistance
JP2000167482A (en) Precoated metal sheet having excellent adhesion property with coating film
JP3969462B2 (en) Painting method
JPS6344962A (en) Preparation of painted steel plate
JP2005137997A (en) Method for forming multiple layer coating film by powder coating
AU2011213775A1 (en) Fastenings and other components for use with treated timber

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2550444

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

WWE Wipo information: entry into national phase

Ref document number: 2004811785

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2004811785

Country of ref document: EP

ENP Entry into the national phase

Ref document number: PI0417768

Country of ref document: BR