(19)
(11) EP 4 056 738 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.12.2022 Bulletin 2022/51

(43) Date of publication A2:
14.09.2022 Bulletin 2022/37

(21) Application number: 22159930.1

(22) Date of filing: 03.03.2022
(51) International Patent Classification (IPC): 
C25F 5/00(2006.01)
C23F 1/08(2006.01)
 C23C 10/60(2006.01)
C23F 1/44(2006.01)
(52) Cooperative Patent Classification (CPC):
C25F 5/00; Y02T 50/60; C23F 1/08; C23F 1/44; C23C 10/60
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 12.03.2021 US 202117200429

(71) Applicant: Raytheon Technologies Corporation
Farmington, CT 06032 (US)

(72) Inventors:
  • MINOR, Michael
    Mansfield, 76063 (US)
  • STRATTON, Eric
    Mansfield, 76063 (US)

(74) Representative: Dehns 
St. Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) SYSTEMS AND METHODS FOR REMOVAL OF DIFFUSION COATING FROM AIRFOILS


(57) 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).







Search report












Search report