US20080277288A1 - Method For Removing A Coating From A Component - Google Patents
Method For Removing A Coating From A Component Download PDFInfo
- Publication number
- US20080277288A1 US20080277288A1 US11/630,137 US63013705A US2008277288A1 US 20080277288 A1 US20080277288 A1 US 20080277288A1 US 63013705 A US63013705 A US 63013705A US 2008277288 A1 US2008277288 A1 US 2008277288A1
- Authority
- US
- United States
- Prior art keywords
- coating
- stripping
- compounds
- turbine blades
- chromium oxide
- 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.)
- Abandoned
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000011248 coating agent Substances 0.000 title claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- 239000003112 inhibitor Substances 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 11
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 claims abstract description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000012720 thermal barrier coating Substances 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 150000001298 alcohols Chemical class 0.000 claims description 2
- -1 aldehyde compounds Chemical class 0.000 claims description 2
- 150000004653 carbonic acids Chemical class 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 10
- 230000002411 adverse Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 101710095827 Cyclopropane mycolic acid synthase 1 Proteins 0.000 description 2
- 101710095826 Cyclopropane mycolic acid synthase 2 Proteins 0.000 description 2
- 101710095828 Cyclopropane mycolic acid synthase 3 Proteins 0.000 description 2
- 101710110342 Cyclopropane mycolic acid synthase MmaA2 Proteins 0.000 description 2
- 102100031349 N-acylneuraminate cytidylyltransferase Human genes 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HJVAFZMYQQSPHF-UHFFFAOYSA-N 2-[bis(2-hydroxyethyl)amino]ethanol;boric acid Chemical compound OB(O)O.OCCN(CCO)CCO HJVAFZMYQQSPHF-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011328 necessary treatment Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- 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
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/26—Acidic compositions for etching refractory metals
-
- 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
- C23G1/106—Other heavy metals refractory metals
-
- 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
Definitions
- the invention relates to a method for removing a coating containing chromium and/or chromium oxide compounds from a component with the aid of a stripping bath.
- such a stripping operation can be carried out for example by means of an electrochemical process. This involves immersing the component from which the coating is to be stripped in an electrolyte and thereby forming the working electrode. By applying a voltage to the corresponding counter electrodes, the coating on the component that is to be stripped is dissolved.
- EP 1 314 797 A2 Another method for stripping coatings from components is described in EP 1 314 797 A2. This is a chemical stripping method.
- the component from which the coating is to be stripped is immersed in a solution comprising hydrochloric acid and an inhibitor reducing the extent to which the base material of the component is attacked.
- the stripping bath formed by the hydrochloric acid makes the coating dissolve.
- TGOs thermally grown oxides
- Cr 2 O 3 or Cr x Co y O compounds are examples of materials that are known as thermally grown oxides (hereafter TGOs) on the base material of the coated component.
- TGOs thermally grown oxides
- These compounds have a high chemical stability, for which reason they can only be removed by the stripping bath if they are left for a considerable time. Furthermore, such compounds may also be formed during the stripping process, causing the stripping procedure to take even longer. The compounds increasingly cover the surface of the component to be stripped, for which reason the removal rate during stripping drops as the treatment time increases. According to EP 1 314 797 A2, it is therefore proposed to carry out the stripping process in a number of steps, with the surfaces being mechanically worked between each of the treatment steps, so that the contaminants that occur or have not yet been removed can be removed.
- the object of the invention is to provide a method for removing coatings containing chromium and/or chromium oxide compounds which allows short treatment times for the stripping process.
- This object is achieved according to the invention by a method for removing a coating containing chromium and/or chromium oxide compounds from a component in which the coated component is introduced into a stripping bath and is removed again after the treatment time has elapsed, an alkanolamine compound or a salt containing such a compound being added to the stripping bath as an inhibitor.
- the method according to the invention can be used particularly advantageously for the stripping of coatings from turbine blades, it being possible in particular for MCrAlY coatings and/or thermal barrier coatings to be removed from the turbine blades.
- the MCrAlY coating often serves here as an intermediate layer between the turbine blade and the thermal barrier coating (TBC). It goes without saying that said coating systems can also be removed from any other components if necessary (for example from feed pipes of gas turbines).
- FIGURE shows a diagram which represents the course of various exemplary embodiments of the method according to the invention.
- the exemplary embodiment of the method was that of removing an MCrAlY coating from turbine blades that have been in operation, a five percent hydrochloric acid being used as the stripping bath.
- triethanolamine of a one percent or two percent concentration was added.
- the stripping bath was exposed to ultrasound at a frequency of 36 kHz.
- the exemplary embodiments of the method according to the invention involved electrochemical stripping, the potential at the turbine blade being kept at 0.100 V SCE and 0.340 V SHE.
- the diagram shows the current I in amperes A measured at the turbine blade over the treatment time t in hours h.
- This current can be used as a direct measure of the removal rate at the turbine blade.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Method for removing coatings which have been applied to components such as turbine blades. After the end of the product life cycle of the turbine blades has been reached, these coatings can be removed to reuse the turbine blades after recoating. The coating, containing in particular chromium oxide compounds is removed via a stripping bath by adding alkanolamine compounds or salts containing such compounds as the inhibitor. These compounds advantageously prevent new chromium oxide compounds from being produced during the stripping of the turbine blades or the chromium oxide compounds present in the coating are removed effectively, so that the chromium oxide compounds cannot have an adverse influence on the removal rate of the stripping process. Advantageously reduced treatment times can thereby be achieved for the stripping process. By adding 2% triethanolamine, the treatment time in hydrochloric acid for example can be reduced to below one hour.
Description
- The invention relates to a method for removing a coating containing chromium and/or chromium oxide compounds from a component with the aid of a stripping bath.
- According to
EP 1 094 134 A1, such a stripping operation can be carried out for example by means of an electrochemical process. This involves immersing the component from which the coating is to be stripped in an electrolyte and thereby forming the working electrode. By applying a voltage to the corresponding counter electrodes, the coating on the component that is to be stripped is dissolved. - Another method for stripping coatings from components is described in
EP 1 314 797 A2. This is a chemical stripping method. The component from which the coating is to be stripped is immersed in a solution comprising hydrochloric acid and an inhibitor reducing the extent to which the base material of the component is attacked. The stripping bath formed by the hydrochloric acid makes the coating dissolve. - With the methods mentioned it is possible for example to strip coatings from turbine blades when they reach the end of their intended service life. This is because subsequent recoating allows the turbine blades to have a further life cycle, for which reason there is great interest in the effective stripping of coatings from turbine blades. When stripping coatings from turbine blades, it is necessary to remove not only the coatings that have been used, such as MCrAlY coatings or thermal protective coatings (known as thermal barrier coatings, hereafter TBCs), but also the contaminants that have occurred on the coating over the time during which the turbine blade has been in operation, preferentially comprising complex crystalline compounds. Compounds of the Ca—Mg—Al—Si—O system (hereafter referred to as CMASs) may be mentioned in this connection. Other compounds that are difficult to remove comprise what are known as thermally grown oxides (hereafter TGOs) on the base material of the coated component, such as for example Cr2O3 or CrxCoyO compounds. These compounds have a high chemical stability, for which reason they can only be removed by the stripping bath if they are left for a considerable time. Furthermore, such compounds may also be formed during the stripping process, causing the stripping procedure to take even longer. The compounds increasingly cover the surface of the component to be stripped, for which reason the removal rate during stripping drops as the treatment time increases. According to
EP 1 314 797 A2, it is therefore proposed to carry out the stripping process in a number of steps, with the surfaces being mechanically worked between each of the treatment steps, so that the contaminants that occur or have not yet been removed can be removed. - The object of the invention is to provide a method for removing coatings containing chromium and/or chromium oxide compounds which allows short treatment times for the stripping process.
- This object is achieved according to the invention by a method for removing a coating containing chromium and/or chromium oxide compounds from a component in which the coated component is introduced into a stripping bath and is removed again after the treatment time has elapsed, an alkanolamine compound or a salt containing such a compound being added to the stripping bath as an inhibitor. This is because it has surprisingly been found for alkanolamine compounds and salts containing them as inhibitors that they not only reduce an attack on the base material of the coated component by the stripping bath but also suppress the formation of TGOs or the dissolving of TGOs and CMASs. This advantageously allows a stripping process with comparatively high removal rates to be maintained over a longer treatment time than is possible with the inhibitors that are used according to the prior art. This allows the method according to the invention to be used more cost-effectively, in particular there is no need for the stripping procedure to be interrupted for an intermediate mechanical working step, or at least allows the treatment times between these mechanical working steps to be prolonged. This advantageously reduces the overall time that is necessary for performing the stripping process, for which reason the method can be used more cost-effectively. Furthermore, instances of the base material of the coated component being damaged as a result of mechanical working steps can be avoided, whereby the number of reject components during stripping is reduced, which additionally contributes to improved cost-effectiveness of the method. It has been found to be advantageously particularly effective to use triethanolamine or one of its salts, such as triethanolamine borate, as the inhibitor.
- It is advantageous to add carbonic acids and/or aldehyde compounds and/or unsaturated alcohols as further inhibitors, the effect of which as an inhibitor during stripping is already known. The mixtures of inhibitors advantageously improve the overall effect of the stripping bath as a whole.
- The method according to the invention can be used particularly advantageously for the stripping of coatings from turbine blades, it being possible in particular for MCrAlY coatings and/or thermal barrier coatings to be removed from the turbine blades. The MCrAlY coating often serves here as an intermediate layer between the turbine blade and the thermal barrier coating (TBC). It goes without saying that said coating systems can also be removed from any other components if necessary (for example from feed pipes of gas turbines).
- Further details of the invention are described below with reference to the drawing. The single FIGURE shows a diagram which represents the course of various exemplary embodiments of the method according to the invention. The exemplary embodiment of the method was that of removing an MCrAlY coating from turbine blades that have been in operation, a five percent hydrochloric acid being used as the stripping bath. Furthermore, in a method conducted in parallel, triethanolamine of a one percent or two percent concentration was added. During the treatment time, the stripping bath was exposed to ultrasound at a frequency of 36 kHz.
- The exemplary embodiments of the method according to the invention involved electrochemical stripping, the potential at the turbine blade being kept at 0.100 V SCE and 0.340 V SHE. The diagram shows the current I in amperes A measured at the turbine blade over the treatment time t in hours h.
- This current can be used as a direct measure of the removal rate at the turbine blade.
- It is found that, with the addition of one percent or two percent triethanolamine (TEA), the current density for dissolving can be increased by a multiple in comparison with the use of pure hydrochloric acid. This allows removal of the coating from the turbine blade to be achieved in a correspondingly shorter time. This is evident in the drawing from the drop in current. The necessary treatment times can be reduced as a result to below one hour.
Claims (5)
1-5. (canceled)
6. A method for electrochemically removing a coating containing chromium and/or chromium oxide compounds from a component in which the coated component is introduced into a stripping bath and is removed again after the treatment time has elapsed, an alkanolamine compound or a salt containing such a compound being added to the stripping bath as an inhibitor, characterized in that triethanolamine or one of its salts is added as the inhibitor, the coating being removed from a turbine blade.
7. The method as claimed in claim 6 , characterized in that carbonic acids and/or aldehyde compounds and/or unsaturated alcohols are added as further inhibitors.
8. The method as claimed in claim 6 , characterized in that the coating is an MCrAlY coating and/or a thermal barrier coating.
9. The method as claimed in claim 7 , characterized in that the coating is an MCrAlY coating and/or a thermal barrier coating.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04015424.7 | 2004-06-30 | ||
| EP04015424A EP1612299B1 (en) | 2004-06-30 | 2004-06-30 | Method and apparatus for surface treatment of a component |
| DE200410053135 DE102004053135A1 (en) | 2004-10-29 | 2004-10-29 | Process for removing a coating containing a chromium and/or chromium oxide compound from a component comprises placing the component in a bath containing an alkanol-amine compound as inhibitor and removing after a treatment time |
| DE102004053135.8 | 2004-10-29 | ||
| PCT/DE2005/001090 WO2006002610A1 (en) | 2004-06-30 | 2005-06-13 | Method for removing a coating from a component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20080277288A1 true US20080277288A1 (en) | 2008-11-13 |
Family
ID=34972912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/630,137 Abandoned US20080277288A1 (en) | 2004-06-30 | 2005-06-13 | Method For Removing A Coating From A Component |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20080277288A1 (en) |
| EP (1) | EP1761660A1 (en) |
| WO (1) | WO2006002610A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100072073A1 (en) * | 2006-09-18 | 2010-03-25 | Rene Jabado | Method for the electrochemically coating or stripping the coating from components |
| US20100089768A1 (en) * | 2006-06-23 | 2010-04-15 | Jens Dahl Jensen | Method for the electrochemical removal of a metal coating from a component |
| US20100272888A1 (en) * | 2006-08-08 | 2010-10-28 | Siemens Aktiengesellschaft | Method for producing a wear layer |
| WO2015088741A1 (en) * | 2013-12-09 | 2015-06-18 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| FR3018827A1 (en) * | 2013-04-23 | 2015-09-25 | Dourdin | PROCESS FOR REALIZING METALLIC PARTS |
| US9926517B2 (en) | 2013-12-09 | 2018-03-27 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| CN113106532A (en) * | 2021-04-07 | 2021-07-13 | 江苏源清动力技术有限公司 | Process for removing thermal barrier coating of thermal component of aero-engine and gas turbine |
| US11834632B2 (en) | 2013-12-09 | 2023-12-05 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007049496A1 (en) * | 2007-09-14 | 2009-03-19 | Extrude Hone Gmbh | Electrolyte for electrochemical machining |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6165345A (en) * | 1999-01-14 | 2000-12-26 | Chromalloy Gas Turbine Corporation | Electrochemical stripping of turbine blades |
| US6352636B1 (en) * | 1999-10-18 | 2002-03-05 | General Electric Company | Electrochemical system and process for stripping metallic coatings |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2254398A1 (en) * | 1972-11-07 | 1974-05-16 | Dillenberg Bergische Metall | Electrolytic bath for removal of metal coatings - contain salts of org, nitric and phosphoric acids and opt. chlorides, hypochlorites or rhodanides |
| US4233124A (en) * | 1979-10-29 | 1980-11-11 | Oxy Metal Industries Corporation | Electrolytic stripping bath and process |
| DE3420702A1 (en) * | 1984-06-02 | 1985-12-05 | Dico Gesellschaft für Galvanotechnik mbH & Co KG, 4020 Mettmann | Bath for electrolytic stripping of metal coatings on aluminium and magnesium |
| JPH02285081A (en) * | 1989-04-25 | 1990-11-22 | Sanyo Chem Ind Ltd | Etching solution |
| US6454870B1 (en) | 2001-11-26 | 2002-09-24 | General Electric Co. | Chemical removal of a chromium oxide coating from an article |
| US6878215B1 (en) * | 2004-05-27 | 2005-04-12 | General Electric Company | Chemical removal of a metal oxide coating from a superalloy article |
-
2005
- 2005-06-13 US US11/630,137 patent/US20080277288A1/en not_active Abandoned
- 2005-06-13 WO PCT/DE2005/001090 patent/WO2006002610A1/en active Application Filing
- 2005-06-13 EP EP05770315A patent/EP1761660A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6165345A (en) * | 1999-01-14 | 2000-12-26 | Chromalloy Gas Turbine Corporation | Electrochemical stripping of turbine blades |
| US6352636B1 (en) * | 1999-10-18 | 2002-03-05 | General Electric Company | Electrochemical system and process for stripping metallic coatings |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100089768A1 (en) * | 2006-06-23 | 2010-04-15 | Jens Dahl Jensen | Method for the electrochemical removal of a metal coating from a component |
| US20100272888A1 (en) * | 2006-08-08 | 2010-10-28 | Siemens Aktiengesellschaft | Method for producing a wear layer |
| US8673405B2 (en) | 2006-08-08 | 2014-03-18 | Siemens Aktiengesellschaft | Method for producing a wear layer |
| US20100072073A1 (en) * | 2006-09-18 | 2010-03-25 | Rene Jabado | Method for the electrochemically coating or stripping the coating from components |
| FR3018827A1 (en) * | 2013-04-23 | 2015-09-25 | Dourdin | PROCESS FOR REALIZING METALLIC PARTS |
| WO2015088741A1 (en) * | 2013-12-09 | 2015-06-18 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| US9926517B2 (en) | 2013-12-09 | 2018-03-27 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| US11834632B2 (en) | 2013-12-09 | 2023-12-05 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| US12187986B2 (en) | 2013-12-09 | 2025-01-07 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
| CN113106532A (en) * | 2021-04-07 | 2021-07-13 | 江苏源清动力技术有限公司 | Process for removing thermal barrier coating of thermal component of aero-engine and gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1761660A1 (en) | 2007-03-14 |
| WO2006002610A1 (en) | 2006-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRUGER, DR. URSUS;REICHE, RALPH;ULLRICH, RAYMOND;AND OTHERS;REEL/FRAME:020323/0941;SIGNING DATES FROM 20071123 TO 20071128 |
|
| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |