EP1507901B1 - Dispositif et procede de retrait de zones de surface d'un composant - Google Patents

Dispositif et procede de retrait de zones de surface d'un composant Download PDF

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Publication number
EP1507901B1
EP1507901B1 EP03727147A EP03727147A EP1507901B1 EP 1507901 B1 EP1507901 B1 EP 1507901B1 EP 03727147 A EP03727147 A EP 03727147A EP 03727147 A EP03727147 A EP 03727147A EP 1507901 B1 EP1507901 B1 EP 1507901B1
Authority
EP
European Patent Office
Prior art keywords
current
component
process according
electrode
pulse
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
EP03727147A
Other languages
German (de)
English (en)
Other versions
EP1507901A2 (fr
Inventor
Daniel Körtvelyessy
Ralph Reiche
Jan Steinbach
Marc De Vogelaere
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
Priority to EP05024433A priority Critical patent/EP1632589B1/fr
Publication of EP1507901A2 publication Critical patent/EP1507901A2/fr
Application granted granted Critical
Publication of EP1507901B1 publication Critical patent/EP1507901B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • 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 device and a method for removing surface areas of a component according to claim 1 or 2.
  • components coated with coatings of the type MCrAlY or ZrO 2 for example, by acid stripping in combination with sand blasting or by high-pressure water jets stripped.
  • DE-B 10 43 008 relates to a method for removing steel sand residues sandblasted surfaces of metal strips and an apparatus for performing this method.
  • the EP 1 122 323 A1 and the US 5,944,909 show examples of the chemical removal of surface areas.
  • the EP 1 941 34 A1 , the EP 1 010 782 A1 as well as the U.S. Patent 6,165,345 disclose methods for the electrochemical removal of metallic coatings (stripping).
  • the object of the invention is therefore to provide a device and a method in which the stripping runs faster and cheaper.
  • the object is achieved by an apparatus and a method for removing surface areas of a component according to claim 1 or 2.
  • FIG. 1 shows a device 1 according to the invention.
  • the device 1 consists of a container 4, in which an electrolyte 7 is arranged.
  • an electrode 10 and a component 13 is arranged in the electrolyte 7, an electrode 10 and a component 13 is arranged.
  • the electrode 10 and the component 13 are electrically connected to a current / voltage pulse generator 16.
  • the component 13 is, for example, a coated turbine blade, which has as a substrate a nickel- or cobalt-based superalloy on which a metallic layer is applied, which serves, for example, as a corrosion protection or anchoring layer.
  • a layer has, in particular, the composition MCrAlY, where M represents an element iron, cobalt or nickel.
  • the coating is corroded during use of the turbine blade 13.
  • the resulting surface area 25 (indicated by dashed lines) is to be removed by the method according to the invention and the device 1 according to the invention.
  • the current pulse generator 16 generates a pulsed current / voltage signal (FIG. 2).
  • an ultrasonic probe 19 is arranged, which is operated by an ultrasonic source 22.
  • the ultrasonic excitation improves the hydrodynamics of the process and thereby supports the electrochemical reaction.
  • FIG. 2 shows an exemplary current / voltage curve of the current / voltage pulse generator 16.
  • the current pulse signal or the voltage pulse is, for example, rectangular (pulse shape) and has a pulse duration t on . Between the individual impulses there is a break of the length t off . Furthermore, the current pulse signal is determined by its current level I max . The current flowing between the electrode 10 and the device 13 (I max ), the pulse duration (t on ) and the pulse pause (t off ) have a significant influence on the electrochemical reaction by accelerating it.
  • FIG. 3 shows an example of a sequence of current pulses 40 that repeat themselves.
  • a sequence 34 consists of at least two blocks 77.
  • Each block 77 consists of at least one current pulse 40.
  • a current pulse 40 is characterized by its duration t on , the height I max and its pulse shape (rectangle, triangle, ). Equally important as process parameters are the pauses between the individual current pulses 40 (t off ) and the pauses between the blocks 77.
  • the sequence 34 consists, for example, of a first block 77 with three current pulses 40, between which in turn takes a break. This is followed by a second block 77, which has a greater current level and consists of six current pulses 40. After another pause, four current pulses 40 follow in the opposite direction, ie with a changed polarity.
  • sequence 34 is followed by another block 77 with four current pulses.
  • the sequence 34 can be repeated several times.
  • the individual pulse times t on are preferably of the order of magnitude of about 1 to 10 milliseconds.
  • the duration of the block 77 is on the order of up to 10 seconds, so that up to 500 pulses are emitted in a block 77.
  • a block 77 is matched with its parameters to a constituent of an alloy, which is to be stripped, for example, in order to achieve the best removal of this constituent. These can be determined in individual experiments.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (9)

  1. Dispositif (1) pour enlever des zones de surface d'un élément (13) constitutif,
    qui a une cuve (4) dans laquelle est placé un électrolyte (7),
    dans lequel l'élément constitutif peut être introduit,
    qui a une électrode (10),
    l'électrode et l'élément constitutif pouvant être reliés électriquement entre eux, et
    l'électrode étant disposée au moins en partie dans l'électrolyte,
    le dispositif ayant un générateur (16) d'impulsions de courant électrique,
    qui peut être monté électriquement entre l'électrode (10) et l'élément (13) constitutif,
    le générateur (16) d'impulsions de courant pouvant produire des impulsions de courant, caractérisé
    en ce que le dispositif (1) a une sonde (19) ultrasonore,
    qui est disposée dans la cuve (4), et
    qui est entourée de l'électrolyte (7).
  2. Procédé d'enlèvement d'une couche d'une zone de surface d'un élément constitutif,
    dans lequel une électrode (10) et l'élément (13) constitutif sont disposés dans un électrolyte (7), l'électrode et l'élément constitutif étant reliés d'une manière conductrice de l'électricité entre eux et à un générateur (16) de courant,
    le générateur (16) de courant produisant un courant pulsé ou une tension pulsée, caractérisé
    en ce que l'on utilise pour l'enlèvement électrolytique d'une couche de manière répétée plusieurs impulsions (40) de courant/tension qui sont rassemblées en une séquence,
    la séquence (34) étant formée d'au moins deux blocs (77) différents,
    un bloc (77) étant constitué d'au moins une impulsion (40) de courant.
  3. Procédé suivant la revendication 2,
    caractérisé
    en ce qu'il est appliqué à l'élément (13) constitutif un potentiel positif ou un potentiel négatif,
    pour produire un courant de base ou une tension de base.
  4. Procédé suivant la revendication 2,
    caractérisé
    en ce que l'on fait fonctionner une sonde (19) ultrasonore dans l'électrolyte (7).
  5. Procédé suivant la revendication 2,
    caractérisé
    en ce que, pour l'enlèvement par l'électrolyse d'une couche, on utilise une impulsion (40) de courant/tension, tant des impulsions (40) positives que négatives de courant/tension étant utilisées.
  6. Procédé suivant la revendication 2,
    caractérisé
    en ce qu'un bloc (77) est déterminé par un nombre d'impulsions (40) de courant, par une durée (ton) d'impulsion, par un intervalle (toff) entre les impulsions, par une intensité (Imax) de courant et par une forme des impulsions.
  7. Procédé suivant la revendication 2,
    caractérisé
    en ce qu'un bloc (77) est accordé, respectivement, à un constituant d'un alliage qui doit être éliminé pour renforcer l'enlèvement d'une couche du constituant de l'alliage.
  8. Procédé suivant la revendication 2,
    caractérisé
    en ce qu'on enlève une couche d'un alliage du type MCrAlY,
    M étant un élément du groupe du fer, du cobalt ou du nickel.
  9. Procédé suivant la revendication 2,
    caractérisé
    en ce que l'on superpose un courant de base aux impulsions (40) de courant et/ou aux intervalles entre les impulsions.
EP03727147A 2002-04-08 2003-03-21 Dispositif et procede de retrait de zones de surface d'un composant Expired - Lifetime EP1507901B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05024433A EP1632589B1 (fr) 2002-04-08 2003-03-21 Procédé de retrait de zones de surface d'un composant

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10215374 2002-04-08
DE10215374 2002-04-08
DE10259365 2002-12-18
DE10259365A DE10259365A1 (de) 2002-04-08 2002-12-18 Vorrichtung und Verfahren zur Entfernung von Oberflächenbereichen eines Bauteils
PCT/DE2003/000953 WO2003085174A2 (fr) 2002-04-08 2003-03-21 Dispositif et procede de retrait de zones de surface d'un composant

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP05024433A Division EP1632589B1 (fr) 2002-04-08 2003-03-21 Procédé de retrait de zones de surface d'un composant

Publications (2)

Publication Number Publication Date
EP1507901A2 EP1507901A2 (fr) 2005-02-23
EP1507901B1 true EP1507901B1 (fr) 2007-10-17

Family

ID=28792820

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05024433A Expired - Lifetime EP1632589B1 (fr) 2002-04-08 2003-03-21 Procédé de retrait de zones de surface d'un composant
EP03727147A Expired - Lifetime EP1507901B1 (fr) 2002-04-08 2003-03-21 Dispositif et procede de retrait de zones de surface d'un composant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05024433A Expired - Lifetime EP1632589B1 (fr) 2002-04-08 2003-03-21 Procédé de retrait de zones de surface d'un composant

Country Status (6)

Country Link
US (2) US7569133B2 (fr)
EP (2) EP1632589B1 (fr)
CN (1) CN100379900C (fr)
DE (3) DE10259365A1 (fr)
ES (2) ES2317127T3 (fr)
WO (1) WO2003085174A2 (fr)

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DE10259362A1 (de) * 2002-12-18 2004-07-08 Siemens Ag Verfahren zum Abscheiden einer Legierung auf ein Substrat
EP1473387A1 (fr) * 2003-05-02 2004-11-03 Siemens Aktiengesellschaft Procédé de décapage d'une couche d'une pièce
DE502004006578D1 (de) 2004-06-30 2008-04-30 Siemens Ag Verfahren und Vorrichtung zur Oberflächenbehandlung eines Bauteils
EP1860210A1 (fr) * 2006-05-22 2007-11-28 Siemens Aktiengesellschaft Méthode pour l'usinage électrolytique d'un élément
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
DE102006044416A1 (de) * 2006-09-18 2008-03-27 Siemens Ag Verfahren zum elektrochemischen Be- oder Entschichten von Bauteilen
FR2937054B1 (fr) 2008-10-13 2010-12-10 Commissariat Energie Atomique Procede et dispositif de decontamination d'une surface metallique.
DE102009036221A1 (de) * 2009-08-05 2011-02-17 Extrude Hone Gmbh Verfahren zur elektrochemischen Bearbeitung eines Werkstückes
WO2011063353A2 (fr) * 2009-11-23 2011-05-26 Metcon, Llc Solution d'électrolyte et procédés d'électropolissage
US8580103B2 (en) 2010-11-22 2013-11-12 Metcon, Llc Electrolyte solution and electrochemical surface modification methods
CN103088398B (zh) * 2011-10-31 2016-05-11 通用电气公司 多通道电化学去金属涂层系统及其控制电路
DE102012012419A1 (de) 2012-06-25 2014-04-24 OT Oberflächentechnik GmbH & Co. KG Schwerin Vorrichtung und Verfahren zum lokalen Entschichten
DE202014010831U1 (de) 2014-03-18 2016-11-23 Platit Ag Halterung zum Entschichten von keramischen Hartstoffschichten von Stahl- und Hartmetall-Substraten
WO2015139731A1 (fr) 2014-03-18 2015-09-24 Platit Ag Procédé d'enlèvement de couches en matériau céramique dur de substrats en acier et en métal dur
US10227708B2 (en) 2014-11-18 2019-03-12 St. Jude Medical, Cardiology Division, Inc. Systems and methods for cleaning medical device electrodes
CN104611759B (zh) * 2015-02-12 2017-03-08 广州市精源电子设备有限公司 变极性脉冲酸洗控制方法
US10357839B1 (en) 2015-10-08 2019-07-23 The United States Of America As Represented By The Secretary Of The Army Method for electrochemical machining using sympathetic waveform interactions
MD1448Z (ro) * 2019-06-25 2021-02-28 Сп Завод Топаз Ао Procedeu de eliminare a acoperirilor rezistente la căldură de pe o suprafaţă din aliaje dure
CN113106532B (zh) * 2021-04-07 2023-04-11 江苏源清动力技术有限公司 一种航空发动机和燃气轮机热部件热障涂层去除工艺
EP4309811B1 (fr) 2022-07-18 2024-09-25 Hammann GmbH Procédé d'élimination électromécanique des dépôts dans les conduites tubulaire ou les appareils

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Also Published As

Publication number Publication date
US20090255828A1 (en) 2009-10-15
CN1646735A (zh) 2005-07-27
CN100379900C (zh) 2008-04-09
DE10259365A1 (de) 2003-10-30
ES2292967T3 (es) 2008-03-16
WO2003085174A2 (fr) 2003-10-16
US7569133B2 (en) 2009-08-04
DE50311030D1 (de) 2009-02-12
EP1507901A2 (fr) 2005-02-23
ES2317127T3 (es) 2009-04-16
EP1632589A2 (fr) 2006-03-08
WO2003085174A3 (fr) 2004-12-23
DE50308417D1 (de) 2007-11-29
US20050224367A1 (en) 2005-10-13
EP1632589A3 (fr) 2006-04-05
EP1632589B1 (fr) 2008-12-31

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