EP1411149A1 - Procédé pour l'enlèvement d'un revêtement d'un composant - Google Patents

Procédé pour l'enlèvement d'un revêtement d'un composant Download PDF

Info

Publication number
EP1411149A1
EP1411149A1 EP02023394A EP02023394A EP1411149A1 EP 1411149 A1 EP1411149 A1 EP 1411149A1 EP 02023394 A EP02023394 A EP 02023394A EP 02023394 A EP02023394 A EP 02023394A EP 1411149 A1 EP1411149 A1 EP 1411149A1
Authority
EP
European Patent Office
Prior art keywords
acid
component
bath
salt bath
treatment
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Withdrawn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
EP02023394A
Other languages
German (de)
English (en)
Inventor
Nigel-Philip Cox
Ralph Reiche
Michael Dr. Ott
Ronald Zimmer
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.)
Ot Oberflachentechnik & Co KG GmbH
Siemens AG
Original Assignee
Ot Oberflachentechnik & Co KG GmbH
Siemens AG
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 Ot Oberflachentechnik & Co KG GmbH, Siemens AG filed Critical Ot Oberflachentechnik & Co KG GmbH
Priority to EP02023394A priority Critical patent/EP1411149A1/fr
Priority to US10/531,219 priority patent/US20060231123A1/en
Priority to EP03809256A priority patent/EP1552037B1/fr
Priority to PCT/EP2003/009235 priority patent/WO2004038068A1/fr
Priority to ES03809256T priority patent/ES2275138T3/es
Priority to DE50305651T priority patent/DE50305651D1/de
Priority to EP06020613A priority patent/EP1752562B1/fr
Priority to ES06020613T priority patent/ES2372406T3/es
Priority to CNB038238357A priority patent/CN100392152C/zh
Priority to JP2004545756A priority patent/JP2006503186A/ja
Publication of EP1411149A1 publication Critical patent/EP1411149A1/fr
Priority to US11/502,487 priority patent/US20070131255A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
    • C23G1/32—Heavy metals

Definitions

  • the invention relates to a method for removing a Layer area of a component.
  • thermal barrier coatings have been developed those on thermally stressed components, for example Made of super alloys that are applied alone no longer withstand the high inlet temperatures could.
  • the ceramic thermal barrier coating offers the advantage of one high temperature resistance due to their ceramic properties and the metallic substrate take advantage of good ones mechanical properties in this composite or layer system.
  • composition of these MCrAlY layers can vary however, all MCrAlY layers are subject to the overlying ones Ceramic layer of corrosion by oxidation, sulfidation or other chemical and / or mechanical Attacks.
  • the MCrAlY layer often degrades to a greater extent than the metallic substrate (for example Ni, Co-based superalloy), ie that the service life of the composite system consisting of substrate and layer is determined by the service life of the MCrAlY layer.
  • the MCrAlY layer is only partially functional after a long period of use, however, the substrate can still be fully functional.
  • EP 759 098 B1 shows a method for cleaning Turbine airfoils using potassium hydroxide becomes.
  • the object is achieved by a method according to claim 1, in which a treatment of the component before an acid treatment done in a salt bath.
  • Figure 1 shows a component 1, which with the inventive Procedure to be dealt with.
  • the surface area 10 consists, for example, of an oxide that was formed at high temperatures.
  • Areas that are not degraded can also be methods according to the invention are removed.
  • Figure 2 shows a further component 1, which with the invention Procedure can be treated.
  • the component 1 consists of a substrate 4 (e.g. nickel, cobalt-based superalloy) and a layer 7 (e.g. MCrAlY) which is degraded and is to be removed using the method according to the invention.
  • a substrate 4 e.g. nickel, cobalt-based superalloy
  • a layer 7 e.g. MCrAlY
  • the substrate 4 can also be degraded, the degraded regions of the substrate 4 then also being removed, for example.
  • rough mechanical pre-cleaning such as sandblasting or flow grinding
  • sandblasting or flow grinding can be used to first remove the layer regions 7, 10 to be removed and / or a ceramic thermal insulation layer which is arranged above the layer 7.
  • the treatment with sandblasting and / or flow grinding can also take place between or after the individual salt and acid treatments or at the end.
  • the component 1, in particular the layer regions 7, 10 to be removed, is then treated in a liquid salt bath (melt) into which at least the regions 7, 10 of the component 1 are immersed.
  • a liquid salt bath (melt) into which at least the regions 7, 10 of the component 1 are immersed.
  • salts is understood, for example, to mean, inter alia, compounds of metal (metal ion) and acid residue (acid less than a hydrogen ion), for example NaHCO 3 , Na 2 CO 3 , CaCO 3 .. and / or base residue.
  • the use of such a compound for the salt bath presupposes that the salt is chemically attacked on the component 1.
  • the salt bath consists, for example, of sodium hydroxide (NaOH) or potassium hydroxide (KOH) (for example a melt bath, ie liquid at temperatures higher than room temperature). Both salts can also be used together and then in particular have a mixing ratio of 50 to 50 percent by volume. Further salt baths are conceivable.
  • sodium oxide (NaO 2 ) above salts can also be added, for example, as an oxygen supplier, which increases the chemical attack on the areas to be removed.
  • oxygen suppliers are conceivable, such as an oxygen supply, oxides or metal oxides.
  • Treatments of component 1 can also be carried out in different ways Salt baths can be made one after the other.
  • washing and / or drying takes place.
  • the temperature differences between the salt bath and the washing medium are used for a thermal shock, which mechanically weakens the layer area to be removed due to the formation of cracks.
  • an acid treatment is carried out, for example, with nitric acid HN0 3 and / or sulfuric acid H 3 PO 4 .
  • Other acids eg sulphurous, sapletous acid, carbonic acid, hydrofluoric acid, ...) and / or acid mixtures are conceivable and are tailored to the respective salt bath.
  • the individual treatment steps in which the component with comes into contact with the salt bath or the various acids, as well as watering and drying can each be done multiple times be repeated.
  • FIG. 3 shows a device 22 with which the method according to the invention can be carried out.
  • the device 22 consists of a container 19 in which a liquid salt or salt mixture or an acid is present.
  • the component 1 is immersed in this liquid.
  • the method can be shortened or improved if an ultrasound probe 16 is present in the bath 13 and is operated.
  • FIG. 4 shows a component 1 which has been treated by the method according to the invention. Component 1 no longer has any corroded areas.
  • Flow grinding (see DE 199 02 422A1) is suitable particularly for components 1, in particular for blades of Turbines, with interiors where degraded areas in the Interior are present.
  • outside areas are preferably sandblasted, being there
  • corundum is used.
  • the maximum jet pressure and the Particle size of the blasting material can be adjusted to the Do not damage the substrate.
  • a salt from Degussa which is marketed under the trade name DUFERRIT RS DGS, is preferably used for the salt bath. Oxides of the component that are exposed to the salt bath are transformed into more oxide-rich compounds that are more acid-soluble.
  • the coefficients of expansion of oxides and metals are generally different.
  • a thermal shock is caused, which creates cracks in the area (7, 11) to be removed and weakens it mechanically, for example by enlarging the attack surfaces for salt and / or acid.
  • This thermal shock is used as an additional effect when cleaning.
  • care must be taken that a certain temperature gradient in the component is not exceeded so that no cracks are generated in the substrate or component.
  • Diammonium EDTA is used as the complexing agent.
  • the complexing agent can bind metals, thereby removing them.
  • the treatment with the complexing agent can take place between, before or after the individual salt and acid treatments.
  • an ultrasound probe 16 can also be used in the bath 13 with the complexing agent in order to accelerate the process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
EP02023394A 2002-10-18 2002-10-18 Procédé pour l'enlèvement d'un revêtement d'un composant Withdrawn EP1411149A1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP02023394A EP1411149A1 (fr) 2002-10-18 2002-10-18 Procédé pour l'enlèvement d'un revêtement d'un composant
DE50305651T DE50305651D1 (de) 2002-10-18 2003-08-20 Verfahren zum entfernen eines schichtbereichs eines bauteils
EP03809256A EP1552037B1 (fr) 2002-10-18 2003-08-20 Procede d'elimination d'une zone pelliculaire d'un element constitutif
PCT/EP2003/009235 WO2004038068A1 (fr) 2002-10-18 2003-08-20 Procede d'elimination d'une zone pelliculaire d'un element constitutif
ES03809256T ES2275138T3 (es) 2002-10-18 2003-08-20 Procedimiento de extraccion de una zona pelicular de un componente.
US10/531,219 US20060231123A1 (en) 2002-10-18 2003-08-20 Method for removing a layer area of a component
EP06020613A EP1752562B1 (fr) 2002-10-18 2003-08-20 Procédé d'élimination d'une zone pelliculaire d'un élément constituif
ES06020613T ES2372406T3 (es) 2002-10-18 2003-08-20 Procedimiento para la eliminación de una sección de capa de un componente.
CNB038238357A CN100392152C (zh) 2002-10-18 2003-08-20 除去构件层区域的方法
JP2004545756A JP2006503186A (ja) 2002-10-18 2003-08-20 部品の層範囲の除去方法
US11/502,487 US20070131255A1 (en) 2002-10-18 2006-08-10 Method for removing a layer area of a component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02023394A EP1411149A1 (fr) 2002-10-18 2002-10-18 Procédé pour l'enlèvement d'un revêtement d'un composant

Publications (1)

Publication Number Publication Date
EP1411149A1 true EP1411149A1 (fr) 2004-04-21

Family

ID=32039155

Family Applications (3)

Application Number Title Priority Date Filing Date
EP02023394A Withdrawn EP1411149A1 (fr) 2002-10-18 2002-10-18 Procédé pour l'enlèvement d'un revêtement d'un composant
EP06020613A Expired - Lifetime EP1752562B1 (fr) 2002-10-18 2003-08-20 Procédé d'élimination d'une zone pelliculaire d'un élément constituif
EP03809256A Expired - Lifetime EP1552037B1 (fr) 2002-10-18 2003-08-20 Procede d'elimination d'une zone pelliculaire d'un element constitutif

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP06020613A Expired - Lifetime EP1752562B1 (fr) 2002-10-18 2003-08-20 Procédé d'élimination d'une zone pelliculaire d'un élément constituif
EP03809256A Expired - Lifetime EP1552037B1 (fr) 2002-10-18 2003-08-20 Procede d'elimination d'une zone pelliculaire d'un element constitutif

Country Status (7)

Country Link
US (2) US20060231123A1 (fr)
EP (3) EP1411149A1 (fr)
JP (1) JP2006503186A (fr)
CN (1) CN100392152C (fr)
DE (1) DE50305651D1 (fr)
ES (2) ES2275138T3 (fr)
WO (1) WO2004038068A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1559485A1 (fr) * 2004-01-30 2005-08-03 Siemens Aktiengesellschaft Procédé pour l'enlèvement d'une couche
EP2090677A1 (fr) * 2008-01-19 2009-08-19 MTU Aero Engines GmbH Procédé de suppression au moins sélective d'une première couche d'un composant de turbine
EP2543986A3 (fr) * 2011-07-08 2015-03-04 Deutsche Edelstahlwerke GmbH Procédé de mesure de l'épaisseur de couche de revêtements organiques de matériaux de base métalliques

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004059762A1 (de) * 2004-12-11 2006-06-14 Mtu Aero Engines Gmbh Verfahren zur Reparatur von Turbinenschaufeln
JP4848504B2 (ja) * 2007-03-14 2011-12-28 公益財団法人新産業創造研究機構 セラミックス基板又は無機耐熱性基板の洗浄方法及びこれを用いた素子の製造方法並びに素子
US20090000641A1 (en) * 2007-06-28 2009-01-01 Applied Materials, Inc. Methods and apparatus for cleaning deposition chamber parts using selective spray etch
US7875200B2 (en) 2008-05-20 2011-01-25 United Technologies Corporation Method for a repair process
FR2970197B1 (fr) * 2011-01-11 2013-12-20 Snecma Procede de desolidarisation/solidarisation par induction d'une piece mecanique magnetique collee a une piece mecanique.
US9103037B2 (en) * 2011-09-01 2015-08-11 United Technologies Corporation Method for stripping gamma-gamma prime coating from gamma-gamma prime alloy
JP5881513B2 (ja) * 2012-04-06 2016-03-09 三菱重工業株式会社 ガスタービン用部材のコーティング剥離方法
CN103042006B (zh) * 2013-01-18 2016-01-20 山东大学 超声盐浴复合清洗机
JP6395732B2 (ja) * 2013-03-01 2018-09-26 ゼネラル・エレクトリック・カンパニイ ガスタービン空気圧縮機での腐食を防止するための組成物及び方法
CN103464419A (zh) * 2013-09-24 2013-12-25 山东大学 新型超声盐浴复合清洗机
CN104690033A (zh) * 2015-03-17 2015-06-10 山东大学 一种试验用机械零件超声盐浴复合清洗机
CN105586603B (zh) * 2015-11-23 2018-10-09 佛山市高明俊品金属制品有限公司 一种不锈钢氧化皮去除方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710271A (en) * 1951-08-09 1955-06-07 Int Nickel Co Process for annealing and cleaning oxidized metal in a salt bath
JPS61199085A (ja) * 1985-02-28 1986-09-03 Miyata Kogyo Kk 精密鋳造品の製造法
US5944909A (en) * 1998-02-02 1999-08-31 General Electric Company Method for chemically stripping a cobalt-base substrate
US6132520A (en) * 1998-07-30 2000-10-17 Howmet Research Corporation Removal of thermal barrier coatings
EP1213370A2 (fr) * 2000-12-05 2002-06-12 General Electric Company Procédé et composition pour le nettoyage d'un composant de moteur de turbine à gaz
US20020074017A1 (en) * 2000-12-19 2002-06-20 Schilbe John E. Cleaning of internal passages of airfoils

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US575858A (en) * 1897-01-26 One one-hundredths to william rapp
US2138357A (en) * 1936-04-24 1938-11-29 Solvay Process Co Dialysis of aqueous caustic solutions
US2738293A (en) * 1952-07-25 1956-03-13 Diamond Alkali Co Salt bath system and method for treating metals
US2792283A (en) * 1953-01-28 1957-05-14 Diamond Alkali Co Process of making sodium bicarbonate from sodium hydroxide cell liquor
US2837443A (en) * 1954-07-26 1958-06-03 Eagle Picher Co Method of porcelain enameling
US3000755A (en) * 1956-10-11 1961-09-19 Gen Motors Corp Oxidation-resistant turbine blades
US3000829A (en) * 1958-06-12 1961-09-19 Purex Corp Ltd Composition and process for descaling metal parts
US3015589A (en) * 1959-07-16 1962-01-02 Diamond Alkali Co Chemical method
AT293139B (de) * 1967-02-16 1971-09-27 Degussa Verfahren zum Entzundern von Metallen
US3532591A (en) * 1967-11-28 1970-10-06 Gen Electric Etching silicide coatings and article formed therefrom
US3546084A (en) * 1969-05-19 1970-12-08 Purex Corp Ltd Cleaning method for jet engine parts
US4044106A (en) * 1975-10-15 1977-08-23 Fang Albert Yi Hung Reclamation of phosphate from bright dip drag-out
US4155154A (en) * 1977-10-06 1979-05-22 Sprague Electric Company Anodization of electrolytic capacitor sections
FR2560893B1 (fr) * 1984-03-09 1986-09-12 Snecma Bain de decapage chimique pour pieces en alliage resistant a chaud
FR2564350B1 (fr) * 1984-05-17 1987-11-20 Snecma Procede de reparation par diffusion
US5575858A (en) * 1994-05-02 1996-11-19 United Technologies Corporation Effective cleaning method for turbine airfoils
US5976265A (en) * 1998-04-27 1999-11-02 General Electric Company Method for removing an aluminide-containing material from a metal substrate
WO2000017417A1 (fr) * 1998-09-21 2000-03-30 Siemens Aktiengesellschaft Procede de traitement de l'interieur d'un element creux
US6544002B1 (en) * 2001-11-07 2003-04-08 General Electric Company Method of chemical pretreatment of a lightweight jet engine fan blade
US6902628B2 (en) * 2002-11-25 2005-06-07 Applied Materials, Inc. Method of cleaning a coated process chamber component
US7008553B2 (en) * 2003-01-09 2006-03-07 General Electric Company Method for removing aluminide coating from metal substrate and turbine engine part so treated

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710271A (en) * 1951-08-09 1955-06-07 Int Nickel Co Process for annealing and cleaning oxidized metal in a salt bath
JPS61199085A (ja) * 1985-02-28 1986-09-03 Miyata Kogyo Kk 精密鋳造品の製造法
US5944909A (en) * 1998-02-02 1999-08-31 General Electric Company Method for chemically stripping a cobalt-base substrate
US6132520A (en) * 1998-07-30 2000-10-17 Howmet Research Corporation Removal of thermal barrier coatings
EP1213370A2 (fr) * 2000-12-05 2002-06-12 General Electric Company Procédé et composition pour le nettoyage d'un composant de moteur de turbine à gaz
US20020074017A1 (en) * 2000-12-19 2002-06-20 Schilbe John E. Cleaning of internal passages of airfoils

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198642, Derwent World Patents Index; Class M14, AN 1986-274660, XP002228489 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1559485A1 (fr) * 2004-01-30 2005-08-03 Siemens Aktiengesellschaft Procédé pour l'enlèvement d'une couche
EP1818112A2 (fr) * 2004-01-30 2007-08-15 Siemens Aktiengesellschaft Procédé pour éliminer une couche
EP1818112A3 (fr) * 2004-01-30 2007-09-12 Siemens Aktiengesellschaft Procédé pour éliminer une couche
EP2090677A1 (fr) * 2008-01-19 2009-08-19 MTU Aero Engines GmbH Procédé de suppression au moins sélective d'une première couche d'un composant de turbine
EP2543986A3 (fr) * 2011-07-08 2015-03-04 Deutsche Edelstahlwerke GmbH Procédé de mesure de l'épaisseur de couche de revêtements organiques de matériaux de base métalliques

Also Published As

Publication number Publication date
DE50305651D1 (de) 2006-12-21
EP1752562A1 (fr) 2007-02-14
WO2004038068A1 (fr) 2004-05-06
JP2006503186A (ja) 2006-01-26
EP1552037B1 (fr) 2006-11-08
ES2275138T3 (es) 2007-06-01
CN100392152C (zh) 2008-06-04
EP1552037A1 (fr) 2005-07-13
EP1752562B1 (fr) 2011-10-05
US20070131255A1 (en) 2007-06-14
US20060231123A1 (en) 2006-10-19
CN1688749A (zh) 2005-10-26
ES2372406T3 (es) 2012-01-19

Similar Documents

Publication Publication Date Title
EP1752562B1 (fr) Procédé d'élimination d'une zone pelliculaire d'un élément constituif
DE60030197T2 (de) Verfahren zum Entfernen von Aluminidüberzügen von Substraten
DE602004006446T2 (de) Verfahren zur Entfernung von Aluminidbeschichtungen von Metallsubstraten und behandelte Gasturbinekomponente
DE102006008465A1 (de) Drehbare Maschine und Teile derselben
DE60105830T2 (de) Verfahren zum Entfernen einer Metallschicht eines Schichtsystems
WO2005072884A1 (fr) Procede pour eliminer une couche
DE69930486T2 (de) Verfahren zur Entfernung von Heisskorrosionsprodukten von einer Aluminiddiffusionsschicht
DE2339608A1 (de) Verfahren zum entfernen einer aluminidschicht
EP0318724B1 (fr) Procédé pour enlever par voie chimique des revêtements de surface protecteurs à base de chrome à partir de pièces en superalliages à base de nickel ou de cobalt
DE4120305C1 (fr)
DE2717435C3 (de) Verfahren zum Entfernen eines Aluminium und Chrom zusammen mit Kobalt enthaltenden Überzugs von einem aus einer Nickelbasislegierung bestehenden Substrat
EP2737103B1 (fr) Procédé d'application d'une couche de protection contre l'usure sur un composant de turbomachine
DE112006002001T5 (de) Verfahren zur Reparatur von durch Sulfidationsangriff zerstörten Turbinenkomponenten
DE10160107A1 (de) Reinigung eines inneren Kanals einer Gasturbinenschaufel
EP1097249B1 (fr) Procede de realisation d'un blindage pour un composant metallique
DE3248041C2 (de) Wäßrige Lösung zum Abbeizen harter Oberflächenüberzüge von Metallsubstraten und deren Verwendung
EP2766149B1 (fr) Procédé de réparation de dommages superficiels d'un composant de turbomachine
EP0906964B1 (fr) Couche formant une barrière thermique et procédé pour sa production
DE3414383A1 (de) Verfahren zum chemischen abtragen von aluminiumdiffusionsschichten und verwendung
WO2012031913A1 (fr) Circuit de fluide pour une centrale électrique et procédé pour le nettoyage chimique d'un circuit de fluide
EP2184379A1 (fr) Procédé destiné à décaper des surfaces de composants uniquement à l'aide d'acide chlorhydrique
EP1941077A1 (fr) Technologie pour nettoyer des fissures de fatigue thermique dans des super alliages a base de nickel a forte teneur en chrome
WO2003100110A2 (fr) Procédé permettant d'éliminer au moins une zone partielle d'une pièce en métal ou constituée d'un composite métallique
EP1088907A1 (fr) Procédé de réalisation d'un blindage pour un composant métallique
EP1557241B1 (fr) Procédé de traitement de pièces en aluminium coulé

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20041022