EP1819849A1 - Procede pour surveiller un processus de traitement electrochimique et ensemble electrode convenant a ce procede - Google Patents

Procede pour surveiller un processus de traitement electrochimique et ensemble electrode convenant a ce procede

Info

Publication number
EP1819849A1
EP1819849A1 EP05823664A EP05823664A EP1819849A1 EP 1819849 A1 EP1819849 A1 EP 1819849A1 EP 05823664 A EP05823664 A EP 05823664A EP 05823664 A EP05823664 A EP 05823664A EP 1819849 A1 EP1819849 A1 EP 1819849A1
Authority
EP
European Patent Office
Prior art keywords
counter electrode
electrode arrangement
workpiece
counter
arrangement
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Withdrawn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
EP05823664A
Other languages
German (de)
English (en)
Inventor
Axel Arndt
Uwe Pyritz
Gabriele Winkler
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
Original Assignee
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 Siemens AG filed Critical Siemens AG
Publication of EP1819849A1 publication Critical patent/EP1819849A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C25D17/12—Shape or form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B23H11/006—Electrical contacts or wires
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/12—Process control or regulation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Definitions

  • the invention relates to a method of monitoring an electrochemical treatment process for the Ar ⁇ beitselektrode forming workpiece, in which a predetermined potential between the working electrode and a Jacobelek ⁇ trodenan expect voltage is maintained using a Referenzelektrodenanord ⁇ .
  • EP 639 769 A2 discloses a method in which a defined potential between a working electrode and a counter electrode can be applied, said Po ⁇ potential is maintained during the electrochemical treatment process by means of a reference electrode.
  • the working electrode, the counter electrode and the reference electrode are connected to a potentiostat.
  • the object of the invention is to specify a method for monitoring an electrochemical treatment process check, by means of this treatment process ⁇ be subjected can be controlled comparatively accurately on the desired treatment result.
  • the reference electrode arrangement has a plurality of individual electrodes which are brought into contact with the surface of the workpiece to be treated in a plurality of locations without contact.
  • the measured values determined by means of the grub Referenzelekt ⁇ arrangement can still be used to optimize the electrochemical interaction of the ⁇ piece unit with the counter electrode assembly.
  • Hier ⁇ can be modified, for example, distances or the shape of the counter electrode assembly to spielmud not planar workpiece geometries in terms of a uniform electrochemical treatment result justice.
  • DA electrochemical treatment processes in the sense of inven ⁇ tion are all electrochemical processes to understand.
  • DA in it may, for example, the electrochemical From ⁇ decision of layers to the electrochemical dissolution of layers (stripping, or stripping), (z. B. drilling) to the elektro ⁇ chemical polishing (surface treatment) or an electrochemical shaping act.
  • a voltage is applied, which generates a small compared to the treatment process flow Meßström, and at the individual or in several groups combined individual electrodes of Referenzelektrodenan ⁇ order each comparison potentials are determined.
  • the measurement result generated can thus be in the above-admit ⁇ nen manner as to the location on the surface of the loading dissolve the acting component. Since only a small measuring current is used, the measurement result is only slightly influenced by the processes normally taking place during the electrochemical treatment. Therefore, the generated measurement result can be used, for example, for an exact positioning of the counterelectrode with complex workpiece geometries.
  • regions of the workpiece can be detected, which may be problematic for carrying out the electrochemical treatment process. This can be taken into takes into (z. B. In order to change the local process-related current density process stream in these Stel ⁇ len), for example by adapting the geometry of the counter electrode assembly. In unproblematic areas of the workpiece, the individual electrodes of the reference electrode arrangement can also be electrically combined into a group so that they produce a common measured value.
  • the inventive method can be used to continue that of the workpiece and to the Jacobelektrodenan ⁇ the predetermined order for the treatment process potential is applied, wherein for monitoring the potential of the Refe rence ⁇ electrodes are electrically connected in parallel.
  • the reference electrode arrangement serves in a known manner to maintain the potential demanded for the treatment process and can be used for this purpose, for example.
  • B connected to a potentiostat.
  • the parallel-connected individual electrodes of the reference electrode arrangement behave like resistors connected in parallel, so that in each case the same potential is applied to them.
  • the invention relates to a Jacobelektrodenanord- tion for the electrochemical treatment of workpieces, in which the workpieces form the working electrode.
  • Such a counter electrode arrangement is known, for example, from EP 1 094 134 A1.
  • This counter-electrode arrangement consists of two electrode plates, which can be brought from both sides to a turbine blade to be decoated.
  • the electrode plates can have surfaces designed in accordance with the profile of the turbine blade. This makes it possible to maintain a constant distance of the electrode plates from the surface of the turbine blade to be decoated.
  • the object of the invention is to provide a counter electrode arrangement for electrochemical treatment processes, with which a positioning of the counter electrode arrangement relative to a workpiece to be treated can be carried out in a simple manner.
  • a reference electrode arrangement is mechanically connected to the counterelectrode arrangement, wherein the connection is designed as electrical insulation between the counter electrode arrangement and the reference electrode arrangement and the reference electrode Order is formed of a plurality of individual electrodes, with electrode tips that are movable within a provided for the workpieces treatment area.
  • Comparison potential can be determined by means of the reference electrode arrangement with a spatial resolution over the surface of the workpiece. The necessary procedure has already been explained. By the mechanical coupling be- see counter electrode assembly and reference electrode driving voltage North ⁇ are vorteil ⁇ way of precise geometric relationships defined between the two electrode assemblies, so that an alignment of the reference electrode assembly automatically performs an alignment of the counter electrode assembly.
  • This electrically insulating connection can preferably consist of electrically insulating connecting pieces. This may for example be attached electrode assembly in the Gegen ⁇ while a Füh ⁇ tion for realizing the individual electrodes of the reference electrode assembly.
  • the counter electrode of the Gegenelekt ⁇ rodenanssen is flat and is malleable within the Be ⁇ treatment area.
  • the counterelectrode can For example, be designed as a flexible grid.
  • the deformable counter electrode arrangement can be optimally adapted to the geometry of the workpiece to be treated. The deformability allows for adjustment within a range defined by the limits of deformability treatment preparation ⁇ ches. Thus workpieces to be treated equally, provided the development area to be treated surface within the treatmen ⁇ lies.
  • the individual electrodes of the counter electrode assembly may be formed in part by way of vor ⁇ rod-shaped and in the Gegenelekt ⁇ rode be fixed axially.
  • the fixation can preferably take place with the connection pieces already described.
  • FIG. 1 shows an exemplary embodiment of the invention
  • Figure 2 shows the structure of an embodiment of the counter electrode arrangement according to the invention as Aus ⁇ cut.
  • an electrochemical treatment bath 12 is filled. Further, a work ⁇ are in the treatment piece 13 (for example the blade of a gas turbine, not shown) and fixed a counter electrode assembly fourteenth
  • the counter-electrode arrangement consists of a flexible, grid-shaped counter electrode 15 and a contact 16. Furthermore, connecting pieces 17 are fixed in the grid, in which rod-shaped individual electrodes 18 are kept electrically insulating.
  • the individual electrodes 18 are further aligned in their axial extent perpendicular to the surface 21 and also pierce the counter electrode 15 at right angles to their local orientation, so that the
  • Counter electrode 15 extends substantially parallel to the surface 21.
  • the workpiece 13, the counter electrode arrangement 14 and the reference electrode arrangement 19 can be connected to a potentiostat 24 via electrical lines 23.
  • the individual electrodes 18 are connected through individual lines 25 to a switching unit 26, via which an electrical Verbin ⁇ dung to the potentiostat 24 is prepared.
  • the switching unit furthermore has a control and evaluation unit 27. With this, the individual electrodes 18 by means of the switching unit 26 individually switched in respective groups connected in parallel or maral ⁇ switched in their entirety in parallel.
  • the arrangement of the workpiece 13 as described (Arbeitselekt ⁇ rode), counter electrode assembly 14 and Referenzelektrodenan- order 19 Poteniostaten 24, switching unit 26 and the control and evaluation unit 27 allows for multiple operating states.
  • a measuring current between the workpiece 13 and the Gegen ⁇ can by means of the Potentiosta ⁇ th 24 electrode arrangement 14 are generated, which is so low that it voltage measurement, using the reference electrode drive North ⁇ 19 does not interfere.
  • a local measurement potential can then be measured, which Zvi ⁇ rule is present the respective electrode tips and the local, an ⁇ adjacent surface regions of the workpiece. 13
  • the geometry of the counter electrode 15 is varied until the comparison potential at the individual electrodes 18 to ⁇ least largely compensated.
  • the data is processed by the control and evaluation unit 27.
  • the desired electrochemical ⁇ mix treatment process takes place.
  • this can consist of removing the coating and subsequently of re-coating, so that the turbine blades are reused can be.
  • the individual electrodes are electrically connected in parallel in the control unit and to Einhal ⁇ tung constant treatment parameters to the potentiostat 24 is connected.
  • the individual electrodes 20 are guided axially in an electrode carrier 28.
  • electrically insulating guide bushes 29 are inserted into the electrode carrier 28 for this purpose.
  • Ver ⁇ are connection pieces 17 can be seen which are fixed firmly on the grub Einzelelekt ⁇ and 15 are connected (for example by casting) the other to the grid of the Ge ⁇ counterelectrode. If the individual electrodes are displaced axially into the electrode carrier 28, therefore, the counterelectrode 15 adapts in accordance with the axial displacement.
  • the contacts 22 are designed as sockets for the unillustrated Einzellei ⁇ lines 25.
  • the electrode carrier 28 furthermore effects a parallel alignment of the individual electrodes 18 with one another.
  • a constant distance of the electrode tips 20 to a surface of the workpiece to be treated, not shown a constant distance of the counter electrode is achieved at the same time to this surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un ensemble contre-électrode (14) pouvant être utilisé, par exemple, pour l'application et l'élimination d'un revêtement sur des aubes de turbines, ainsi qu'un procédé pour faire fonctionner cet ensemble contre-électrode. L'ensemble contre-électrode selon l'invention comprend un ensemble électrode de référence qui est relié de manière isolante à la contre-électrode (15) au moyen de plots de contact (17). L'adaptation de l'ensemble électrode de référence, qui présente des électrodes individuelles (18), à une surface à traiter permet de générer un potentiel équilibré sur la surface à traiter lors du processus de traitement. L'invention concerne également un procédé pour faire fonctionner l'ensemble contre-électrode selon l'invention. Selon ce procédé, l'ensemble contre-électrode peut être sollicité par un courant de mesure lors d'une première étape pour la génération d'un potentiel équilibré, les électrodes individuelles (18) de l'ensemble électrode de référence étant mises en contact individuellement afin de déterminer le potentiel local correspondant à la surface du composant à traiter. Ce faisant, la contre-électrode peut être réglée de sorte que le potentiel soit équilibré au niveau des électrodes individuelles. Lors du traitement consécutif de la pièce, les électrodes individuelles sont interconnectées en parallèle et sont utilisées comme électrode de référence pour respecter un potentiel de traitement requis.
EP05823664A 2004-11-17 2005-11-16 Procede pour surveiller un processus de traitement electrochimique et ensemble electrode convenant a ce procede Withdrawn EP1819849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004056158A DE102004056158B3 (de) 2004-11-17 2004-11-17 Verfahren zum Überwachen eines elektrochemischen Behandlungsprozesses und für dieses Verfahren geeignete Elektrodenanordnung
PCT/EP2005/056005 WO2006053877A1 (fr) 2004-11-17 2005-11-16 Procede pour surveiller un processus de traitement electrochimique et ensemble electrode convenant a ce procede

Publications (1)

Publication Number Publication Date
EP1819849A1 true EP1819849A1 (fr) 2007-08-22

Family

ID=35874365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05823664A Withdrawn EP1819849A1 (fr) 2004-11-17 2005-11-16 Procede pour surveiller un processus de traitement electrochimique et ensemble electrode convenant a ce procede

Country Status (4)

Country Link
US (1) US20070295614A1 (fr)
EP (1) EP1819849A1 (fr)
DE (1) DE102004056158B3 (fr)
WO (1) WO2006053877A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166125A1 (fr) * 2008-09-19 2010-03-24 ALSTOM Technology Ltd Procédé pour la configuration des services d'un réseau personnel
FR2958300B1 (fr) * 2010-03-31 2012-05-04 Snecma Dispositif pour controler des caracteristiques physiques d'un bain d'electrodeposition metallique.
KR20150078139A (ko) * 2013-12-30 2015-07-08 현대자동차주식회사 연료전지 시스템용 배관 표면처리방법
DE102014218169B4 (de) 2014-09-11 2022-01-20 MTU Aero Engines AG Elektrochemische Bearbeitung eines Werkstücks
DE102015219233A1 (de) * 2015-10-06 2017-04-06 Continental Automotive Gmbh Vorrichtung zum Bearbeiten eines Werkstücks für einen Fluidinjektor und Verfahren zum Herstellen eines Düsenkörpers für einen Fluidinjektor
DE102018004841B9 (de) * 2018-06-13 2020-12-03 Hooshiar Mahdjour Verfahren und Vorrichtung zur automatisierten Regelung der Ströme in einem Galvanikbad
CN112575365A (zh) * 2019-09-29 2021-03-30 张宇明 一种电镀阳极及使用该电镀阳极的电镀方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE806508C (de) * 1949-09-10 1951-06-14 Siemens & Halske A G Formanode fuer das galvanische Aufbringen von metallischen Schichten auf ebene oder leicht gekruemmte Flaechen
FI91997C (fi) * 1993-08-20 1994-09-12 Conrex Oy Elektrodijärjestelmän, johon kuuluu mittauselektrodi, vertailuelektrodi ja vastaelektrodi, käyttö vetyperoksidin pitoisuuden mittaamisessa
US6352636B1 (en) * 1999-10-18 2002-03-05 General Electric Company Electrochemical system and process for stripping metallic coatings
DE10100297A1 (de) * 2001-01-04 2002-07-18 Gesimat Gmbh Vorrichtung und Verahren zur elektrochemischen Beschichtung
DE10132408C2 (de) 2001-07-04 2003-08-21 Fraunhofer Ges Forschung Elektrode mit veränderbarer Form
US7842169B2 (en) * 2003-03-04 2010-11-30 Applied Materials, Inc. Method and apparatus for local polishing control

Non-Patent Citations (1)

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Title
See references of WO2006053877A1 *

Also Published As

Publication number Publication date
DE102004056158B3 (de) 2006-03-30
WO2006053877A1 (fr) 2006-05-26
US20070295614A1 (en) 2007-12-27

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