EP3184180A1 - Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen - Google Patents

Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen Download PDF

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Publication number
EP3184180A1
EP3184180A1 EP16204712.0A EP16204712A EP3184180A1 EP 3184180 A1 EP3184180 A1 EP 3184180A1 EP 16204712 A EP16204712 A EP 16204712A EP 3184180 A1 EP3184180 A1 EP 3184180A1
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EP
European Patent Office
Prior art keywords
component
recited
substrate
repair
filled epoxy
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.)
Granted
Application number
EP16204712.0A
Other languages
English (en)
French (fr)
Other versions
EP3184180B1 (de
Inventor
William Bogue
Dorel M. Moisei
Bruce R. SAXTON
John D. Riehl
Xiaomei Fang
William J. Brindley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RTX Corp
Original Assignee
United Technologies Corp
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Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Publication of EP3184180A1 publication Critical patent/EP3184180A1/de
Application granted granted Critical
Publication of EP3184180B1 publication Critical patent/EP3184180B1/de
Active legal-status Critical Current
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Classifications

    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/005—Repairing damaged coatings
    • 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
    • B05D2601/00—Inorganic fillers
    • 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
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/005—Repairing methods or devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/80—Repairing, retrofitting or upgrading methods

Definitions

  • the present disclosure relates generally to a remanufactures process and, more particularly, to a repair process for aluminum fan blades.
  • Gas turbine engines such as those that power modern commercial and military aircraft, generally include a fan section, a compressor section to pressurize an airflow, a combustor section to burn a hydrocarbon fuel in the presence of the pressurized air, and a turbine section to extract energy from the resultant combustion gases.
  • the fan section often includes aluminum fan blades designed with a multi-layer polyurethane erosion coating to protect both sides of the airfoil from operational erosion and subsequent corrosion.
  • the erosion coatings sustain erosion, FOD and local damage in service, but there is only minimal repair capability for these coatings.
  • a method according to one disclosed non-limiting embodiment of the present disclosure e.g. a method for repairing a component or a multi-layer polyurethane erosion coating can include applying a paint primer onto a substrate of a flowpath surface; and applying a filled epoxy paste to the paint primer.
  • a further embodiment of the present disclosure may include, wherein the method is applied to a local area.
  • a further embodiment of the present disclosure may include, wherein the method provides for a local repair to an erosion coating on a flowpath surface.
  • a further embodiment of the present disclosure may include, wherein the method provides for a local repair to an airfoil surface of a fan blade.
  • a further embodiment of the present disclosure may include finishing the filled epoxy paste.
  • a component according to one disclosed non-limiting embodiment of the present disclosure can include a local area of missing erosion coating with a filled epoxy paste over a substrate that forms an airfoil surface.
  • a further embodiment of the present disclosure may include, wherein the substrate is aluminum.
  • a further embodiment of the present disclosure may include a paint primer between the filled epoxy paste and the substrate.
  • a further embodiment of the present disclosure may include, wherein the paint primer is a corrosion inhibiting paint primer.
  • a further embodiment of the present disclosure may include a component obtained by the methods as herein described.
  • Figure 1 schematically illustrates a general perspective view of an exemplary component 20, e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • a component 20 e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • FIG. 1 schematically illustrates a general perspective view of an exemplary component 20, e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • a component type is illustrated in the disclosed non-limiting embodiment, other components with a multi-layer erosion coating system such as a part in the airstream of the engine with an erosion resistant coating, more specifically an airfoil, and even more specifically, a guide vane or a fan blade will also benefit herefrom.
  • a cross-section of the component 20 is illustrated for an aluminum substrate 30 such as a 2000, 6000, or 7000 series aluminum with a multi-layer coating 35.
  • the coating 35 includes a phosphoric acid anodize layer 40, a corrosion inhibiting epoxy bond primer 50, a corrosion inhibiting paint primer 60, and an elastomeric erosion coating 70 such as a urethane or fluoroelastomer as the outer layer. It should be appreciated that various materials may be utilized in accords with this layer structure.
  • a local repair 100 for the component 20 may be performed on an airflow surface. That is, the local repair of damage may be performed in response to damage into the erosion coating system 35 and as deep as the aluminum substrate 30.
  • the local repair 100 may be initiated by abrading thru some or all layers in the erosion coating system and may be as deep as the aluminum substrate 30 or for damage that has reached down to the aluminum substrate 30.
  • the erosion coating system adjacent to the damage may be abraded, feathered or otherwise prepared and cleaned with, for example aluminum oxide and an acetone wipe to provide for adhesion of the repair coating system.
  • the corrosion inhibiting paint primer 60 provides corrosion protection to the aluminum substrate 30 and also facilitates receipt of a filled epoxy paste 200 such as Duralco 4525 manufactured by Cotronics Corp., of Brooklyn NY USA. It is recognized that for other composite or metallic substrates, the paint primer may not need to provide corrosion protection to the substrate and the use of the primer layer may be optional or a non-corrosion inhibiting primer may be utilized.
  • the epoxy paste provides for relatively faster thickness build rates than elastomeric coating material options facilitating faster overall repair process times.
  • the filled epoxy paste 200 may then be sanded or otherwise finished to provide an acceptable flowpath surface.
  • the filled epoxy paste 200 facilitates field repairs, provides erosion protection and protects primer layers within the repair coating system.

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  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16204712.0A 2015-12-24 2016-12-16 Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen Active EP3184180B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201562387453P 2015-12-24 2015-12-24

Publications (2)

Publication Number Publication Date
EP3184180A1 true EP3184180A1 (de) 2017-06-28
EP3184180B1 EP3184180B1 (de) 2020-06-10

Family

ID=57681297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204712.0A Active EP3184180B1 (de) 2015-12-24 2016-12-16 Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen

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EP (1) EP3184180B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3431712A1 (de) * 2017-07-21 2019-01-23 United Technologies Corporation Verfahren zum abziehen und erneuten beschichten von erosionsbeschichtungen auf gebläseschaufeln und strukturellen leitschaufeln
EP3434865A1 (de) * 2017-07-21 2019-01-30 United Technologies Corporation Verfahren zum abziehen und erbeuten beschichten von erosionsbeschichtungen auf gebläseschaufeln und strukturelle leitschaufeln
EP3513903A1 (de) * 2018-01-18 2019-07-24 United Technologies Corporation Lüfterschaufel mit gefüllter tasche
EP3748125A1 (de) * 2019-06-07 2020-12-09 Raytheon Technologies Corporation Verfahren zur reparatur eines mehrschichtig beschichteten bauteils
US11274950B2 (en) 2019-06-17 2022-03-15 United Technologies Corporation Fabrication of high density sensor array

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171704B1 (en) * 1995-12-29 2001-01-09 Sermatech International, Inc. Coating for aerospace aluminum parts
US20050019589A1 (en) * 2003-07-25 2005-01-27 Analytical Services And Materials, Inc.. Erosion-resistant silicone coatings for protection of fluid-handling parts
US20050271881A1 (en) * 2004-05-24 2005-12-08 Hong Shek C Abrasion resistant coatings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171704B1 (en) * 1995-12-29 2001-01-09 Sermatech International, Inc. Coating for aerospace aluminum parts
US20050019589A1 (en) * 2003-07-25 2005-01-27 Analytical Services And Materials, Inc.. Erosion-resistant silicone coatings for protection of fluid-handling parts
US20050271881A1 (en) * 2004-05-24 2005-12-08 Hong Shek C Abrasion resistant coatings

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3431712A1 (de) * 2017-07-21 2019-01-23 United Technologies Corporation Verfahren zum abziehen und erneuten beschichten von erosionsbeschichtungen auf gebläseschaufeln und strukturellen leitschaufeln
EP3434865A1 (de) * 2017-07-21 2019-01-30 United Technologies Corporation Verfahren zum abziehen und erbeuten beschichten von erosionsbeschichtungen auf gebläseschaufeln und strukturelle leitschaufeln
US11260421B2 (en) 2017-07-21 2022-03-01 Raytheon Technologies Corporation Method to strip and recoat erosion coatings applied to fan blades and structural guide vanes
EP3513903A1 (de) * 2018-01-18 2019-07-24 United Technologies Corporation Lüfterschaufel mit gefüllter tasche
US10677068B2 (en) 2018-01-18 2020-06-09 Raytheon Technologies Corporation Fan blade with filled pocket
EP3748125A1 (de) * 2019-06-07 2020-12-09 Raytheon Technologies Corporation Verfahren zur reparatur eines mehrschichtig beschichteten bauteils
US11274950B2 (en) 2019-06-17 2022-03-15 United Technologies Corporation Fabrication of high density sensor array

Also Published As

Publication number Publication date
EP3184180B1 (de) 2020-06-10

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