EP1432847B8 - Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique - Google Patents

Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique

Info

Publication number
EP1432847B8
EP1432847B8 EP02730264A EP02730264A EP1432847B8 EP 1432847 B8 EP1432847 B8 EP 1432847B8 EP 02730264 A EP02730264 A EP 02730264A EP 02730264 A EP02730264 A EP 02730264A EP 1432847 B8 EP1432847 B8 EP 1432847B8
Authority
EP
European Patent Office
Prior art keywords
component
layer
cleaning agent
metal
impregnating
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.)
Expired - Lifetime
Application number
EP02730264A
Other languages
German (de)
English (en)
Other versions
EP1432847A1 (fr
EP1432847B1 (fr
Inventor
Norbert Czech
Andre Jeutter
Adrian Kempster
Ralph Reiche
Rolf WILKENHÖNER
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.)
Siemens AG En Diffusion Alloys Ltd
Original Assignee
Siemens AG
Diffusion Alloys Ltd
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 Siemens AG, Diffusion Alloys Ltd filed Critical Siemens AG
Priority to EP02730264A priority Critical patent/EP1432847B8/fr
Publication of EP1432847A1 publication Critical patent/EP1432847A1/fr
Application granted granted Critical
Publication of EP1432847B1 publication Critical patent/EP1432847B1/fr
Publication of EP1432847B8 publication Critical patent/EP1432847B8/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • 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
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/90—Coating; Surface treatment

Definitions

  • the invention relates to a method for removing a layer region of a component consisting of metal or a metal compound, in which a multicomponent cleaning agent is applied in a simple manner to the component or the layer region, whereby after a heat treatment of the component with the cleaning agent the layer region easier to remove or remove.
  • One way to increase the efficiency and thus reduce the operating costs, is to increase the inlet temperatures of a combustion gas within a gas turbine.
  • ceramic thermal insulation layers were developed, which are applied to thermally stressed components, for example. Superalloys, which in particular could no longer withstand the high inlet temperatures in the long run.
  • the ceramic thermal barrier layer offers the advantage of high temperature resistance due to its ceramic properties and the metallic substrate offers the advantage of good mechanical properties of this composite or layer system.
  • an adhesion-promoting layer of the composition MCrAlY (main constituents) is applied between the substrate and the ceramic thermal barrier coating, where M means that a metal of nickel, chromium or iron is used.
  • composition of these MCrAlY layers may vary, but all MCrAlY layers are subject to corrosion due to oxidation, sulfidation, nitridation, or other chemical and / or mechanical attack, despite the overlying ceramic layer.
  • the MCrAlY layer often degrades to a greater extent than the metallic substrate, i. the lifetime of the composite system of substrate and layer is determined by the lifetime of the MCrAlY layer.
  • the MCrAlY interlayer is only partially functional after prolonged use, however, the substrate can still be fully functional.
  • a method of removing corrosion products is known from US Pat. No. 6,217,668.
  • the corroded component is accommodated in a large crucible, wherein the component is arranged in a powder bed with an aluminum source.
  • the crucible must be partially closed and then heated in an oven. The heating process supplies aluminum to the corroded component, which allows the areas to be removed by a subsequent acid treatment, which was previously easier to remove, ie had a higher erosion resistance.
  • the invention overcomes the disadvantages described by a method as described in claim 1.
  • the method according to the invention has the advantage that layer regions, for example corrosion products of components, are removed in a simple manner.
  • the ablation can be achieved by mechanical methods, e.g. Sandblasting, jetting, dry ice blasting, and / or by chemical methods, e.g. an acid treatment.
  • the cleaning agent adheres at least partially to the component, in an advantageous manner, for example, the front and back of the component can simultaneously be removed from corrosion products in accordance with the method according to the invention.
  • the adhesion of the cleaning agent to the component can be advantageously carried out by the cleaning agent having a paste-like consistency, in that, for example, the cleaning agent contains a binder.
  • the cleaning agent can also be mixed with a carrier liquid with or without binder and be brushed onto the component or the component is coated by immersion in a flowable mass of liquid and detergent with the cleaning agent.
  • the cleaning agent can also be advantageously applied only locally on the component, since areas that are not corroded need no application of the cleaning agent, which detergent can be saved.
  • masks are no longer necessary in order to protect areas in which no cleaning agent has to be applied, as in the case of large-area application (powder bed, plasma spraying, running aluminum melt).
  • the application of the cleaning agent advantageously takes place in the vicinity of the corrosion products, because thereby the at least one component of the cleaning agent has short diffusion paths during the heat treatment.
  • the cleaning agent is applied, for example, in a thin layer on the component, so that compared to the embedding of the component in a powder bed considerably less material is consumed.
  • the crucible means
  • the sacrificial zone in MCrAlY layers advantageously has a metallic impregnating component, advantageously aluminum, aluminum compound or an aluminum alloy,
  • the cleaning agent may advantageously also contain the metal component in the form of a metal complex.
  • the metal component in the form of a metal complex.
  • the impregnating component must at least partially diffuse out of the cleaning agent into the component. This advantageously takes place in that the impregnating component is applied in gaseous form to the component.
  • the gaseous compound is formed by a reaction with the activating agent, wherein the impregnating agent is advantageously not melted, whereby the process temperatures and thus process costs are reduced.
  • halogen compounds such as ammonium chloride, which forms aluminum with aluminum chloride.
  • the formation of the gaseous compound can be controlled by advantageously adding a carrier substance, for example aluminum oxide, to the cleaning agent, whereby the gas formation is controlled and uniform.
  • a carrier substance for example aluminum oxide
  • the method is advantageously suitable for layer systems such as e.g. a turbine blade having a layer system of a metallic substrate, a MCrAlY layer and a ceramic thermal barrier coating applied thereto.
  • Corrosion products on the MCrAlY layer lead below the corrosion products (Al 2 0 3 ), to a depletion of aluminum in the MCrAlY layer, which thereby become more resistant to acid treatment.
  • the cleaning agent contains aluminum as a metallic component, however, aluminum according to the process of the invention re-accumulates in the previous aluminum-depleted areas of the MCrAlY layer, so that these areas, such as the MCrAlY layer, then dissolve by acid treatment on these areas located corrosion products are replaced with.
  • erosion-resistant layer areas can be removed, or degraded areas, such as e.g. Areas containing corrosion products that form a layer on the corroded part, but also corrosion products that are below the surface of the corroded part.
  • the area of the cleaning agent that is on the component near the surface is before the component is arranged, depleted at the at least one impregnating component.
  • the heat treatment is thus ended when the sacrificial zones are large enough, ie in the case of the MCrAlY layer, the aluminum-depleted areas are sufficiently enriched with aluminum again. If this is not the case, the cleaning agent can be removed and the component can then be subjected to a thermal treatment, wherein advantageously the impregnation of the cleaning agent, which is already present in the component by diffusion, penetrate by diffusion deeper into the component and thus advantageously enlarging the sacrificial or sacrificial layer in depth.
  • An optimum temperature of the thermal treatment is above the temperature of the heat treatment up to the solution annealing temperature of the component.
  • FIG. 1 shows a corroded metallic component
  • FIG. 2 shows a component in which a cleaning paste is applied, which contains a metallic component which penetrates into the corroded area (FIG. 3) by a further method step and thus enables a detachment of the corroded area of the component (FIG. 4),
  • FIG. FIG. 5, 6 shows a layer system in which a layer has corroded areas,
  • FIG. 7 shows a layer system
  • FIG. 8 shows degraded regions of a layer of the layer system which are removed by means of the method according to the invention (FIG. 9)
  • FIG. 10 shows a substrate with a degraded region which is removed by means of the method according to the invention (FIG. and
  • FIG. 12 shows a layer system with a chromium layer which is removed by means of the method according to the invention (FIG. 13).
  • the corrosion 1 shows a component 1 made of metal, a metal alloy or a metal compound which has on one surface 7 external corrosion products 4 and / or inside the component 1 internal corrosion products 5, which are present for example in separately formed regions.
  • the corrosion products 4 may also be continuous, or be present on the entire surface 7, thus forming a corrosion layer.
  • the component 1 can be solid or a layer or a region of a composite or layer system 16 (FIGS. 5, 6).
  • the corrosion products 4, 5 have formed during the use of the component 1 and are undesirable for the further use of the component 1 and must be removed. This is often done by treatment in an acid bath.
  • Corrosion product 4, 5 a component of the component 1 in the area around the corrosion product 4, 5, the so-called depletion area, extracts a component. Therefore, there is an uneven removal or no removal of the corrosion products or the material in the depletion area.
  • the method according to the invention makes it possible to remove the corrosion products completely and uniformly with the material of the component 1.
  • a rough removal of the corrosion products or other areas by mechanical methods such as. Sandblasting, and / or chemical agents, e.g. Acid bath, done.
  • a multicomponent cleaning agent 10 is applied to the corroded component 1, in particular in the areas with the corrosion products 4, 5, which in this example represent the more abrasion-resistant areas (FIG. 2), ie the layer area 52 Layer region 52 is indicated by a dashed line and comprises all corrosion products 4, 5.
  • the cleaning agent 10 contains at least one impregnating component 13, which reacts with at least one activation component of the cleaning agent 10 to form at least one gaseous compound during a heat treatment.
  • the impregnating component 13 is brought into contact with the component 1 or precipitates there, where it forms an impregnating layer in the material of the component 1, for example. From this impregnating layer or directly from the gaseous compound, the impregnating agent diffuses into the regions with the corrosion products 4, 5. The impregnating component 13 is then present at least partially in the regions with the corrosion products 4, 5.
  • the region thus formed, the so-called sacrificial zone 25 (FIG. 3), can be removed in uniform removal together with the material of the component 1, for example by means of an acid bath.
  • a layer region 52 to be removed is indicated by a dashed line.
  • the layer region 52 to be removed comprises all corrosion products, but may also be present deeper than the deepest corrosion product 5.
  • the acid treatment reduces a thickness of the component 1, from a thickness d (FIG. 3) to a smaller thickness d '(FIG. 4).
  • FIG. 4 shows a component 1 without internal and external corrosion products 4, 5 due to the treatment according to the method according to the invention.
  • the choice of the material of the at least one impregnating component depends on the composition of the material of the component 1 and / or the corrosion products 4, 5.
  • the activation component has the task of bringing the impregnating component onto the surface 7 of the part. This happens because the activation component with the impregnation component can form a gaseous compound which can be deposited on the surface 7 of the component 1. To this end, e.g. Halogen compounds into consideration.
  • FIG. 5 shows as a component 1 a layer system 16 which is formed, for example, by a turbine blade or vane.
  • the layer system 16 in this case consists of a substrate 3, for example a superalloy, for example the base composition Ni 3 Al.
  • a layer 22 is applied, for example with the Composition MCrAlY, where M stands for a chemical element Cr, Ni or Fe.
  • This so-called MCrAlY layer forms a corrosion protection layer, which is also known as
  • Adhesive layer can act for a not shown on the layer 22 applied ceramic thermal barrier coating.
  • the layer system 16 for example, it comes to oxidation, nitridation or sulfidation, i. Degradation of the MCrAlY layer 22, so that in the layer 22
  • the corrosion products 4, 5 form an at least partially existing layer in or on or below the surface 7 of the component 16.
  • Corrosion products i. towards the substrate 19, at least one sacrificial zone 25 of aluminum-depleted MCrAlY is formed.
  • these depleted regions represent the more abrasion-resistant region, that is to say the layer region 52.
  • the layer region 52 to be removed is identified by a dashed line and comprises all corrosion products 4, 5 or the entire layer 22.
  • the MCrAlY layer can also deplete of chromium (Cr), so that the impregnation component 13 has, for example, the elements Al and / or Cr.
  • the impregnating component 13 may also contain other metals, eg cobalt, or elements or combinations thereof. Both the corrosion products 4 and the sacrificial zone 25 have in the acid bath compared with the material of the layer 22, ie the MCrAlY, a higher acid resistance.
  • a rough removal of the ceramic thermal barrier coating, the corrosion products or other areas by mechanical methods, such. Sandblasting, and / or chemical agents, e.g. Acid bath, done.
  • the metal component 13 which in this example contains aluminum, diffuses both into the regions with the corrosion products 4 and into the sacrificial zones 25, so that there the at least one metal component 13 is available. Only by enrichment with the metal component 13 can a specific layer thickness of the layer 22 (MCrAlY) be removed uniformly during an acid bath treatment of the layer system 16.
  • the cleaning agent 10 may also have a plurality of metallic components 13 (Al, Cr), if necessary for the composition of the corrosion products or the depleted sacrificial zones 25.
  • the metallic component 13 is, for example, mixed with at least one carrier substance, for example aluminum oxide or aluminum silicate.
  • the cleaning agent 10 may also contain the metallic component 13 in the form of a metal complex.
  • the cleaning agent 10 at least one activating agent, for example.
  • a halogen compound for example in the form of ammonium chloride (NHC1) on.
  • the aluminum reacts as metal component 13 with the Ha ligen connection to a gaseous compound.
  • a gaseous compound This is in the example of ammonium chloride aluminum chloride.
  • the gaseous compound penetrates into the at least one sacrificial zone 25 or enables the aluminum to be injected into the component 1 by, for example, forming an impregnating layer (FIG. 6). Therefore, the metal component 13 does not have to be melted. But it may also be that the gaseous compound forms only at temperatures which is above the melting point of the at least one impregnating, since, for example, a sublimation occurs.
  • the impregnating component 13 and the activating component are contained in a compound (eg A1F 3 ).
  • a compound eg A1F 3
  • A1F gaseous compound aluminum fluoride
  • the heat treatment can be carried out in vacuo or in the protective gases hydrogen and / or argon.
  • the cleaning agent 10 may also have, for example, an organic binder (carboxyl methacrylate, carboxyl methyl cellulose or similar compounds), so that the cleaning agent 10 has a paste-like or mud-like consistency the corroded component 1 can be applied well and can adhere to the component 1, 16 due to the binder.
  • an organic binder carboxyl methacrylate, carboxyl methyl cellulose or similar compounds
  • the invention is not limited to the said application methods.
  • concentration of the metal component 13 in the area of the cleaning agent 10 facing the surface 7 decreases. From this area, only a metal component 13 or, in the extreme case, no metal component 13 can more easily enter the component 1 diffuse.
  • Another, desired deeper penetration of the metal component 13 in the depth of the material 1 takes place only by further diffusion of the already diffused metal component 13.
  • prolonged holding of the component 1 at elevated temperature would result in the metal component 13 passing from a surface 11 of the cleaning agent 10 via the gaseous compound to surface regions 8 of the component 1 on which no cleaning agent 10 had been applied and also no metallic penetration Component 13 or the reaction products is desired.
  • the cleaning agent 10 is removed in this case after a certain period of heat treatment and there is only another, desired penetration of the metal component 13 in the depth of the material 1 by diffusion of the already diffused into the component 1 metallic component 13 due to a thermal treatment of the component 1 without detergent 10 instead.
  • Thermal treatment is, for example, made possible by a solution annealing of the component 1.
  • the removal of the cleaning agent 1 causes no problems, since the metallic component 13 is not melted.
  • the cleaning agent 10 may be applied locally, in particular over the erosion-resistant areas, over a large area or entirely on the component 1, 16.
  • sacrificial zone 25 results in a sacrificial zone 25 to a depth of 80 .mu.m in a heat treatment at 925 ° C and 2h duration, after removal of the detergent is a thermal treatment at 1120 ° C for at most 20h instead: sacrificial zone 25 has a depth of 150 ⁇ m.
  • the duration of the thermal treatment or the temperature can be adjusted by means of calibration curves (diffusion depth as a function of time and temperature) of the spatial extent of the corrosion products in the component.
  • a mask layer can be applied before the heating, which prevents the metallic component 13 from reaching the surface 11 of the cleaning agent 10 to surfaces 8 of the component 1 on which no cleaning agent was applied and also no penetration the metallic component 13 is desired.
  • the cleaning agent 10 can remain on the component 1 and nevertheless a heat treatment be carried out in order to achieve the effect described above.
  • the invention is not limited to parts of gas turbines, but also works with components which have at least one layer, for example an oxidation protection layer, acid protection layer or corrosion protection layer.
  • FIG. 7 shows a layer system 16 that consists of a substrate 19, for example a nickel-based superalloy, an intermediate layer, in particular an MCrAlY layer 28, and an outer heat-insulating layer 31.
  • the layer system 16 was exposed in use mechanical and thermal loads and should be restored for re-use (refurbishment).
  • the thermal barrier coating 31 is removed by sandblasting, for example. This can be done in a simple manner by mechanical means, since it is in the
  • Thermal barrier coatings 31 are mostly ceramic, i. brittle layers.
  • the at least one intermediate layer 28 is metallic and is more difficult to remove by mechanical means.
  • FIG. 8 shows the layer system 16 in which the thermal barrier coating 31 has already been removed and the intermediate layer 28 is shown enlarged.
  • the intermediate layer 28 is degraded. Degradation means in the case that corrosion products, ie oxides, nitrides and sulfides have formed or that a phase segregation has taken place, for example the coagulation of aluminum phases 43 or a change in the concentration structure due to Diffusions.
  • the intermediate layer 28 does not necessarily have the following appearance: In a first zone 34, on which the thermal barrier coating 31 was applied, there are external 4 and internal corrosion products 5 which have been formed by contact and reaction with a reactive medium.
  • a second zone 37 which adjoins the first zone 34 in the direction of the substrate 19, for example, no corrosion products are present, but due to the diffusion due to thermal stress, aluminum or aluminum phases or other elements have coagulated.
  • the second zone 37 is followed by a third zone 40, which is located between the substrate 19 and the second zone 37.
  • the concentration of the intermediate layer 28 has changed from its initial composition due to diffusion of elements into the substrate 19.
  • this is aluminum, for example, which is present in the MCrAlY layer in a higher concentration than in the substrate 19 and therefore due to the
  • Diffusion of concentration diffused into the substrate.
  • the entire intermediate layer 28 is degraded, which represents the layer region 52 to be removed.
  • the third zone 40 can also be made part of a sacrificial zone 25 by impregnation with the impregnating agent 13 and removed.
  • the entire intermediate layer 28 is removed by diffusing the impregnating agent 13 into the entire intermediate layer 28 as far as the substrate 19 (FIG. 9).
  • the removal of the intermediate layer 28 takes place as already described above.
  • FIG. 10 shows a substrate 19, for example a nickel-base superalloy of a turbine blade, which has been degraded by use in a degraded near-surface region 46, which represents the layer region 52 to be removed.
  • the degraded region 46 is, for example, by corrosion or by in-diffusion of elements into the substrate 19 or path diffusion of elements of the Substrate 19 emerged in layers or layer areas of the substrate resting thereon.
  • an impregnating agent 13 is introduced into the degraded region 46, so that the degraded region 46 becomes a sacrificial zone 25 and can be removed completely and more easily (FIG. 11).
  • the layer region 52 to be removed comprises at least the degraded region but can also be enlarged.
  • FIG. 12 shows a layer system 16 that consists of a substrate 19 and a, for example, undegraded chromium layer 49, which represents the layer region 52 to be removed, since a chromium-containing or chromium layer 49 has a high resistance to erosion against chemical erosion processes.
  • the application example is not limited to a chromium layer or the chromium layer can also be degraded by corrosion, for example.
  • the layer 49 can be removed by the usual removal methods such as e.g. Badly remove acid stripping.
  • the impregnating agent 13 is allowed to penetrate into the layer 49, as a result of which the layer 49 can be removed more easily by the customary methods, for example acid stripping
  • the impregnation component 13 may penetrate into the substrate by the heat treatment, or the sacrificial zone 25 may be enlarged by an extension zone 54 during the thermal treatment due to diffusion.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • ing And Chemical Polishing (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne un procédé pour enlever une zone de couche d'un composant en métal ou en alliage métallique. Selon la technique actuelle, les produits de corrosion d'un composant sont enlevés, lors d'une première opération, par application d'une masse fondue ou par réchauffement dans un lit de poudre volumineux, ce qui nécessite des températures élevées ou un grand espace. Le procédé selon l'invention pour enlever des produits de corrosion d'un composant (1) consiste à appliquer localement un agent de nettoyage (10) qui, au moyen d'un produit réactionnel gazeux, élimine les produits de corrosion.
EP02730264A 2001-10-01 2002-05-17 Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique Expired - Lifetime EP1432847B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02730264A EP1432847B8 (fr) 2001-10-01 2002-05-17 Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01123593A EP1298230A1 (fr) 2001-10-01 2001-10-01 Procédé pour enlever des produits de corrosion d'un composant métallique
EP01123593 2001-10-01
EP02730264A EP1432847B8 (fr) 2001-10-01 2002-05-17 Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique
PCT/EP2002/005490 WO2003029521A1 (fr) 2001-10-01 2002-05-17 Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique

Publications (3)

Publication Number Publication Date
EP1432847A1 EP1432847A1 (fr) 2004-06-30
EP1432847B1 EP1432847B1 (fr) 2005-03-09
EP1432847B8 true EP1432847B8 (fr) 2005-06-29

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP01123593A Withdrawn EP1298230A1 (fr) 2001-10-01 2001-10-01 Procédé pour enlever des produits de corrosion d'un composant métallique
EP02730264A Expired - Lifetime EP1432847B8 (fr) 2001-10-01 2002-05-17 Procede pour enlever au moins une zone de couche d'un composant en metal ou en alliage metallique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01123593A Withdrawn EP1298230A1 (fr) 2001-10-01 2001-10-01 Procédé pour enlever des produits de corrosion d'un composant métallique

Country Status (6)

Country Link
US (2) US7138065B2 (fr)
EP (2) EP1298230A1 (fr)
JP (1) JP2005504179A (fr)
CN (1) CN1328413C (fr)
DE (1) DE50202441D1 (fr)
WO (1) WO2003029521A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298230A1 (fr) * 2001-10-01 2003-04-02 Siemens Aktiengesellschaft Procédé pour enlever des produits de corrosion d'un composant métallique
EP1367144A1 (fr) * 2002-05-29 2003-12-03 Siemens Aktiengesellschaft Procédé d'enlèvement des parties d'un composant métallique
EP1676938A1 (fr) * 2004-12-30 2006-07-05 Siemens Aktiengesellschaft Methode de fabrication d'un component d'une turbine et le component d'une turbine
EP1870485A1 (fr) * 2006-06-22 2007-12-26 Siemens Aktiengesellschaft Composition et méthode de métallisation d'un composant
EP1870497A1 (fr) * 2006-06-23 2007-12-26 Siemens Aktiengesellschaft Procédé d'enlèvement électrochimique d'un revêtement métallique d'un substrat
EP1890004A1 (fr) 2006-08-08 2008-02-20 Siemens Aktiengesellschaft Procédé pour la production d'un revêtement à partir du matériau d'un revêtement recyclé
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EP1432847A1 (fr) 2004-06-30
US7138065B2 (en) 2006-11-21
US20040244817A1 (en) 2004-12-09
WO2003029521A1 (fr) 2003-04-10
CN1549874A (zh) 2004-11-24
US20070023392A1 (en) 2007-02-01
DE50202441D1 (de) 2005-04-14
CN1328413C (zh) 2007-07-25
EP1298230A1 (fr) 2003-04-02
US7429337B2 (en) 2008-09-30
EP1432847B1 (fr) 2005-03-09

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