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EP4056738A3 - Systems and methods for removal of diffusion coating from airfoils - Google Patents

Systems and methods for removal of diffusion coating from airfoils Download PDF

Info

Publication number
EP4056738A3
EP4056738A3 EP22159930.1A EP22159930A EP4056738A3 EP 4056738 A3 EP4056738 A3 EP 4056738A3 EP 22159930 A EP22159930 A EP 22159930A EP 4056738 A3 EP4056738 A3 EP 4056738A3
Authority
EP
European Patent Office
Prior art keywords
gas turbine
turbine engine
engine component
diffusion coating
vol
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.)
Withdrawn
Application number
EP22159930.1A
Other languages
German (de)
French (fr)
Other versions
EP4056738A2 (en
Inventor
Michael Minor
Eric STRATTON
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
Raytheon Technologies Corp
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 Raytheon Technologies Corp filed Critical Raytheon Technologies Corp
Publication of EP4056738A2 publication Critical patent/EP4056738A2/en
Publication of EP4056738A3 publication Critical patent/EP4056738A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F5/00—Electrolytic stripping of metallic layers or coatings
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/60—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

A method of removing an aluminide diffusion coating from a gas turbine engine component (192, 194, 196, 198) having a nickel alloy base material may comprise: disposing the gas turbine engine component (192, 194, 196, 198) in a solution (206), the solution (206) including an acid between 5% and 15% vol./vol. and water between 85% and 95% vol./vol.; placing the gas turbine engine component (192, 194, 196, 198) in electrical contact with a graphite plate (204); and removing the aluminide diffusion coating from the gas turbine engine component (192, 194, 196, 198) in response to placing the gas turbine engine component (192, 194, 196, 198) in electrical contact with the graphite plate (204) and disposing the gas turbine engine component in the solution (206).
EP22159930.1A 2021-03-12 2022-03-03 Systems and methods for removal of diffusion coating from airfoils Withdrawn EP4056738A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17/200,429 US20220290322A1 (en) 2021-03-12 2021-03-12 Systems, formulations, and methods for removal of diffusion coating from airfoils

Publications (2)

Publication Number Publication Date
EP4056738A2 EP4056738A2 (en) 2022-09-14
EP4056738A3 true EP4056738A3 (en) 2022-12-21

Family

ID=80625271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22159930.1A Withdrawn EP4056738A3 (en) 2021-03-12 2022-03-03 Systems and methods for removal of diffusion coating from airfoils

Country Status (2)

Country Link
US (1) US20220290322A1 (en)
EP (1) EP4056738A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4886552A (en) * 1988-09-09 1989-12-12 United Technologies Corporation Method for monitoring the removal of a metallic contaminant from the surface of a metallic article
US6176999B1 (en) * 1998-12-18 2001-01-23 United Technologies Corporation Feedback controlled stripping of airfoils
EP1136593A1 (en) * 2000-03-24 2001-09-26 GE Aviation Services Operation (Pte) Ltd. A method for renewing diffusion coatings on superalloy substrates
US20100072072A1 (en) * 2008-09-19 2010-03-25 Daniel Beckel Method for the restoration of a metallic coating

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8377324B2 (en) * 2005-06-10 2013-02-19 Acromet Technologies Inc. Methods for removing coatings from a metal component
CN103088399B (en) * 2011-10-31 2016-01-06 通用电气公司 Multi-step electrochemical metal coat removal method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4886552A (en) * 1988-09-09 1989-12-12 United Technologies Corporation Method for monitoring the removal of a metallic contaminant from the surface of a metallic article
US6176999B1 (en) * 1998-12-18 2001-01-23 United Technologies Corporation Feedback controlled stripping of airfoils
EP1136593A1 (en) * 2000-03-24 2001-09-26 GE Aviation Services Operation (Pte) Ltd. A method for renewing diffusion coatings on superalloy substrates
US20100072072A1 (en) * 2008-09-19 2010-03-25 Daniel Beckel Method for the restoration of a metallic coating

Also Published As

Publication number Publication date
US20220290322A1 (en) 2022-09-15
EP4056738A2 (en) 2022-09-14

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