EP2584069A1 - Pre-treatment for fluoride-ion cleaning and method - Google Patents
Pre-treatment for fluoride-ion cleaning and method Download PDFInfo
- Publication number
- EP2584069A1 EP2584069A1 EP11186215.7A EP11186215A EP2584069A1 EP 2584069 A1 EP2584069 A1 EP 2584069A1 EP 11186215 A EP11186215 A EP 11186215A EP 2584069 A1 EP2584069 A1 EP 2584069A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pretreatment solution
- solution according
- acid
- surfactant
- halogen compound
- 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- Withdrawn
Links
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 7
- 238000002203 pretreatment Methods 0.000 title abstract 2
- 238000004140 cleaning Methods 0.000 title description 4
- 239000002253 acid Substances 0.000 claims abstract description 7
- 238000000746 purification Methods 0.000 claims abstract description 5
- 150000002366 halogen compounds Chemical class 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- -1 halide ions Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims 1
- 150000004820 halides Chemical class 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
-
- 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
Definitions
- the invention relates to a pretreatment of a component which is supplied to a fluoride ion cleaning and a method.
- a fluoride ion cleaning is often used in which the components in a low-pressure chamber (see WO 2009/049637 A1 ) and be exposed at high temperature with fluoride ions.
- the oxide is removed and the cracks or depressions can be well wetted and filled by solder or weld metal.
- the object is achieved by a pretreatment solution according to claim 1 and a method according to claim 10.
- the component to be cleaned is preferably a gas turbine blade and comprises a nickel or cobalt base alloy having an oxide to be soldered, welded or machined which is removed should.
- the surface to be cleaned is immersed in a pretreatment solution prior to the high temperature fluoride ion cleaning, or the pretreatment solution is applied to the surface or into the crack.
- the composition has an acid, especially only one acid.
- an 8% to 12%, in particular 10% sulfuric acid H 2 SO 4 is used.
- the pretreatment solution contains a halogen compound, in particular only one.
- a halogen compound in particular only one.
- This is preferably ammonium hydrogen difluoride, preferably in a concentration of 10g to 20g per liter.
- a surfactant in particular a salt, very particularly sodium dodecyl sulfate added to improve the wetting.
- the residence time of a pretreatment solution is at least 5 minutes at room temperature. After that it can be removed.
- the pretreatment solution may remain on the component and then into the high temperature chamber (preferably as in FIG WO 2009/049637 A1 described) are carried out according to a known purification scheme at high temperatures, but with a shorter residence time.
- the components are typically exposed to halide ions at about 1000 ° C by a halogen-containing pretreatment solution and subsequent fluoride ion purification of the prior art.
- An embodiment consists in the combination of the respective preferred variants.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Durch die Vorbehandlung eines Risses mit Oxiden durch eine halogenidhaltige und säurehaltige Lösung wird eine anschließende Hochtemperaturfluoridionen-Reinigung deutlich verbessert und verkürzt.Pre-treatment of a crack with oxides by a halide-containing and acid-containing solution significantly improves and shortens subsequent high-temperature fluoride ion purification.
Description
Die Erfindung betrifft eine Vorbehandlung eines Bauteils, das einer Fluoridionen-Reinigung zugeführt wird und ein Verfahren.The invention relates to a pretreatment of a component which is supplied to a fluoride ion cleaning and a method.
Vor dem Löten oder vor dem Schweißen von Hochtemperaturbauteilen, wie z.B. von Gasturbinenschaufeln, die insbesondere aus Nickel- oder Kobaltbasislegierungen bestehen, müssen die zu reparierenden Oberflächen von Oxiden befreit werden. Dazu wird oft eine Fluoridionen-Reinigung verwendet, bei dem die Bauteile in eine Niederdruckkammer (siehe
Das Oxid wird entfernt und die Risse bzw. die Vertiefungen können durch Lot oder Schweißgut gut benetzt und befüllt werden.The oxide is removed and the cracks or depressions can be well wetted and filled by solder or weld metal.
Der Prozess läuft manchmal nicht schnell genug ab.Sometimes the process does not run fast enough.
Es ist daher Aufgabe der Erfindung, o.g. Problem zu lösen.It is therefore an object of the invention, o.g. Solve a problem.
Die Aufgabe wird gelöst durch eine Vorbehandlungslösung gemäß Anspruch 1 und ein Verfahren gemäß Anspruch 10.The object is achieved by a pretreatment solution according to claim 1 and a method according to claim 10.
In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden können, um weitere Vorteile zu erzielen.In the dependent claims further advantageous measures are listed, which can be combined with each other in order to achieve further advantages.
Die Beschreibung stellt nur ein Ausführungsbeispiel der Erfindung dar.The description represents only one embodiment of the invention.
Das zu reinigende Bauteil ist vorzugsweise eine Gasturbinenschaufel und weist eine Nickel- oder Kobaltbasislegierung auf, das in einer zu lötenden, zu schweißenden oder zu bearbeitenden Stelle ein Oxid aufweist, das entfernt werden soll. Die zu reinigende Oberfläche wird vor der Hochtemperatur-Fluoridionen-Reinigung in eine Vorbehandlungslösung eingetaucht oder die Vorbehandlungslösung wird auf die Oberfläche oder in den Riss eingebracht.The component to be cleaned is preferably a gas turbine blade and comprises a nickel or cobalt base alloy having an oxide to be soldered, welded or machined which is removed should. The surface to be cleaned is immersed in a pretreatment solution prior to the high temperature fluoride ion cleaning, or the pretreatment solution is applied to the surface or into the crack.
Die Zusammensetzung weist eine Säure auf, insbesondere nur eine Säure.The composition has an acid, especially only one acid.
Vorzugsweise wird eine 8%ige bis 12%ige, insbesondere 10%ige Schwefelsäure H2SO4 verwendet.Preferably, an 8% to 12%, in particular 10% sulfuric acid H 2 SO 4 is used.
Außerdem enthält die Vorbehandlungslösung eine Halogenverbindung, insbesondere nur eine. Dies ist vorzugsweise Ammoniumhydrogendifluorid, vorzugsweise in einer Konzentration von 10g bis 20g pro Liter.In addition, the pretreatment solution contains a halogen compound, in particular only one. This is preferably ammonium hydrogen difluoride, preferably in a concentration of 10g to 20g per liter.
Optional wird noch 0,1g bis 0,5g pro Liter ein Tensid, insbesondere ein Salz, ganz insbesondere Natriumdodecylsulfat hinzugegeben zur Verbesserung der Benetzung.Optionally, 0.1 g to 0.5 g per liter of a surfactant, in particular a salt, very particularly sodium dodecyl sulfate added to improve the wetting.
Die Verweildauer einer Vorbehandlungslösung beträgt bei Raumtemperatur mindestens 5 Minuten. Danach kann sie entfernt werden.The residence time of a pretreatment solution is at least 5 minutes at room temperature. After that it can be removed.
Ebenso kann die Vorbehandlungslösung auf dem Bauteil verbleiben und dann in die Hochtemperaturkammer (vorzugsweise wie in
Dies bedeutet, dass die Bauteile durch eine halogenhaltige Vorbehandlungslösung und durch die anschließende Fluoridionen-Reinigung nach dem Stand der Technik typischerweise bei ungefähr 1000°C Halogenidionen ausgesetzt sind.That is, the components are typically exposed to halide ions at about 1000 ° C by a halogen-containing pretreatment solution and subsequent fluoride ion purification of the prior art.
Ein Ausführungsbeispiel besteht in der Kombination der jeweils bevorzugten Varianten.An embodiment consists in the combination of the respective preferred variants.
Claims (12)
die zumindest aufweist:
which at least has:
die als Säure eine Schwefelsäure aufweist,
insbesondere 8%ig bis 12%ig,
ganz insbesondere 10%ig.Pretreatment solution according to claim 1,
which has a sulfuric acid as the acid,
in particular 8% to 12%,
especially 10%.
bei dem die Halogenverbindung ein Fluorid,
insbesondere Ammoniumhydrogendifluorid darstellt,
ganz insbesondere mit 10g bis 20g pro Liter.Pretreatment solution according to one or both of claims 1 or 2,
in which the halogen compound is a fluoride,
in particular ammonium hydrogen difluoride,
especially with 10g to 20g per liter.
die ein Tensid enthält,
insbesondere Natriumdodecylsulfat enthält.Pretreatment solution according to one or more of claims 1 to 3,
containing a surfactant,
especially sodium dodecyl sulfate.
mit einer Konzentration des Tensids von 0,1g bis 0,5g pro Liter.Pretreatment solution according to one or both of claims 4,
with a concentration of the surfactant of 0.1g to 0.5g per liter.
die aus Säure, Halogenverbindung, Salz besteht.Pretreatment solution according to one or more of claims 1 to 5,
which consists of acid, halogen compound, salt.
die nur eine Säure aufweist.Pretreatment solution according to one or more of claims 1 to 6,
which has only one acid.
die nur eine Halogenverbindung aufweist.Pretreatment solution according to one or more of claims 1 to 7,
which has only one halogen compound.
die nur ein Tensid aufweist.Pretreatment solution according to one or more of claims 1 to 8,
which has only one surfactant.
bei dem das zu reinigende Bauteil mit einer Vorbehandlungslösung nach einem oder mehreren der Ansprüche 1 bis 9 vorbehandelt wird, und
dann in eine Hochtemperaturkammer eingeführt wird,
bei der das Bauteil bei hohen Temperaturen gasförmigen Halogenidionen ausgesetzt ist.Process for fluoride ion purification,
in which the component to be cleaned is pretreated with a pretreatment solution according to one or more of claims 1 to 9, and
then introduced into a high temperature chamber,
in which the component is exposed to gaseous halide ions at high temperatures.
bei dem die Verweildauer der Vorbehandlungslösung um oder in dem Riss mindestens 5 Minuten beträgt.Method according to claim 10,
in which the residence time of the pretreatment solution around or in the crack is at least 5 minutes.
bei der die Behandlung mit der Vorbehandlungslösung bei Raumtemperatur stattfindet.Method according to one or both of claims 10 or 11,
in which the treatment with the pretreatment solution takes place at room temperature.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11186215.7A EP2584069A1 (en) | 2011-10-21 | 2011-10-21 | Pre-treatment for fluoride-ion cleaning and method |
| PCT/EP2012/065462 WO2013056869A1 (en) | 2011-10-21 | 2012-08-07 | Pretreatment in a fluoride ion cleaning operation and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11186215.7A EP2584069A1 (en) | 2011-10-21 | 2011-10-21 | Pre-treatment for fluoride-ion cleaning and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2584069A1 true EP2584069A1 (en) | 2013-04-24 |
Family
ID=46682812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11186215.7A Withdrawn EP2584069A1 (en) | 2011-10-21 | 2011-10-21 | Pre-treatment for fluoride-ion cleaning and method |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2584069A1 (en) |
| WO (1) | WO2013056869A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3562013A (en) * | 1967-10-23 | 1971-02-09 | Diversey Corp | Process of deoxidizing titanium and its alloys |
| US20010009246A1 (en) * | 2000-01-20 | 2001-07-26 | Zimmerman Robert George | Method of removing ceramic coatings |
| US20040074873A1 (en) * | 2002-10-21 | 2004-04-22 | General Electric Company | Process for removing aluminosilicate material from a substrate, and related compositions |
| EP1674561A1 (en) * | 2004-12-27 | 2006-06-28 | General Electric Company | Method for removing engine deposits from turbine components and composition for use in same |
| WO2007048698A1 (en) * | 2005-10-26 | 2007-05-03 | Siemens Aktiengesellschaft | Technology for cleaning thermal fatigue cracks in nickel-based superalloys with a high chromium content |
| WO2009049637A1 (en) | 2007-10-10 | 2009-04-23 | Siemens Aktiengesellschaft | Fic installation and method for operating a fic installation in the pressure range above atmospheric pressure |
-
2011
- 2011-10-21 EP EP11186215.7A patent/EP2584069A1/en not_active Withdrawn
-
2012
- 2012-08-07 WO PCT/EP2012/065462 patent/WO2013056869A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3562013A (en) * | 1967-10-23 | 1971-02-09 | Diversey Corp | Process of deoxidizing titanium and its alloys |
| US20010009246A1 (en) * | 2000-01-20 | 2001-07-26 | Zimmerman Robert George | Method of removing ceramic coatings |
| US20040074873A1 (en) * | 2002-10-21 | 2004-04-22 | General Electric Company | Process for removing aluminosilicate material from a substrate, and related compositions |
| EP1674561A1 (en) * | 2004-12-27 | 2006-06-28 | General Electric Company | Method for removing engine deposits from turbine components and composition for use in same |
| WO2007048698A1 (en) * | 2005-10-26 | 2007-05-03 | Siemens Aktiengesellschaft | Technology for cleaning thermal fatigue cracks in nickel-based superalloys with a high chromium content |
| WO2009049637A1 (en) | 2007-10-10 | 2009-04-23 | Siemens Aktiengesellschaft | Fic installation and method for operating a fic installation in the pressure range above atmospheric pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013056869A1 (en) | 2013-04-25 |
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Effective date: 20131025 |