EP0247209B1 - Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes - Google Patents

Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes Download PDF

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Publication number
EP0247209B1
EP0247209B1 EP86106812A EP86106812A EP0247209B1 EP 0247209 B1 EP0247209 B1 EP 0247209B1 EP 86106812 A EP86106812 A EP 86106812A EP 86106812 A EP86106812 A EP 86106812A EP 0247209 B1 EP0247209 B1 EP 0247209B1
Authority
EP
European Patent Office
Prior art keywords
polishing head
electrolyte
dielectric
cathode
polishing
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
EP86106812A
Other languages
German (de)
English (en)
Other versions
EP0247209A1 (fr
Inventor
Jürgen Menzel
Georg Dr. Henkel
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.)
Poligrat GmbH
Original Assignee
Poligrat GmbH
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 Poligrat GmbH filed Critical Poligrat GmbH
Priority to EP86106812A priority Critical patent/EP0247209B1/fr
Priority to AT86106812T priority patent/ATE54681T1/de
Priority to DE8686106812T priority patent/DE3672831D1/de
Priority to US07/047,653 priority patent/US4772367A/en
Priority to JP62120323A priority patent/JPH0765240B2/ja
Publication of EP0247209A1 publication Critical patent/EP0247209A1/fr
Application granted granted Critical
Publication of EP0247209B1 publication Critical patent/EP0247209B1/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
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing

Definitions

  • the invention relates to a device for electrochemical polishing and / or pickling the inner surfaces of pipes with a flowing electrolyte which at least partially passes through a cathode arranged inside the anodically connected pipe, and a corresponding method for electrochemical polishing and / or pickling pipe inner surfaces .
  • a device for electropolishing the inner walls of pipes in which a pipe lance is introduced into the pipe, which has a cathodic area between its tip and a retaining ring, the pipe lance with bores for the passage of the electrolyte liquid is provided.
  • a device for electropolishing the inner walls of pipes is known from US Pat. No. 3,202,598, a gap being present for the electrolyte between a cathode moving in the pipe and the inner surface of the pipe. In this device, however, no dielectric is printed between the cathode and the inner wall.
  • the known methods and devices for electrochemical polishing and / or pickling of inner tube surfaces have the disadvantage that a very high consumption of electrolyte is required for complete filling, flushing and cooling of the tube.
  • the gases (hydrogen and oxygen) generated during electrolytic polishing also have to be removed, which likewise results in a very high electrolyte throughput through the tube.
  • the invention has for its object to provide a device and a method for electrochemical polishing and / or pickling the inner surfaces of pipes, which enables both a reduction in the amount of electrolyte used and an improvement in the polishing and pickling quality. It is also intended by the invention that a considerably greater variety of electrolyte compositions can be used compared to conventional processes.
  • the device according to the invention for solving this problem is characterized by a polishing head which is movable through the tube and has feed lines for the electrolyte and for electric current, a cathode arranged in the interior of the polishing head and a dielectric which at least partially forms the outer wall of the polishing head, the passes the electrolyte stream and leaves a working gap for the electrolyte stream between itself and the pipe inner surface to be polished or to be etched.
  • the method according to the invention for solving the problem is characterized in that the electrolyte stream is pumped into a polishing head provided with a cathode and out of it by a dielectric into a working gap formed between the dielectric and the inner surface of the tube.
  • a polishing head is thus moved through the tube. It is essential that a so-called working gap is formed between a wall of the polishing head formed from a dielectric and the inner surface of the tube, into which the electrolyte is pressed by the dielectric.
  • Electrolytes that can be regenerated via ion exchangers or electrolytic separation cells can be used. It is possible to keep the metal content of the electrolyte so low that the cathode surfaces cannot be passivated by deposited metal sludge.
  • the electrolyte stream flowing into the polishing head is divided into an anodic partial stream and a cathodic partial stream, the anodic partial stream passing through the dielectric and the inner surface of the tube, but not the cathode, while the cathodic partial stream passes Cathode, but not the inner surface of the tube.
  • the polishing head (12) is slowly moved through the tube 10.
  • the polishing head 12 is sometimes also referred to as a "tampon".
  • the polishing head 12 is moved through the tube 10 by means of a guide 14, which is designed as a tube with a much smaller diameter than the tube 10 to be cleaned.
  • the polishing head 12 is approximately cylindrical and lies concentrically in the pipe 10 to be cleaned.
  • the jacket of the cylindrical polishing head 12 is formed by a dielectric 18 which is uniformly spaced from the inner surface 16 of the tube 10.
  • the polishing head 12 can be moved in the direction of the arrow 20, that is to say in both directions, through the tube 10.
  • the electrolyte flow 22 in FIGS. 1 and 2 enters the polishing head 12 from the right through the guide 14 and in the exemplary embodiment according to FIG. 1 is pressed radially outwards by the dielectric 18 according to the arrows.
  • the guide 14 receives the electrical supply lines 25 for the cathodes 26.
  • a uniform, narrow working gap 28 is formed between the cylindrical jacket-shaped dielectric outer walls of the polishing head 12 and the inner surface 16 of the tube 10.
  • the electrolyte stream 22 'passes through the working gap 28 and, in a known manner, effects the electrochemical removal and polishing on the inner surface 16.
  • the electrolyte stream 22 entering the polishing head 12 is divided into a cathodic and an anodic partial stream 30 or 32.
  • the cathodic partial stream 30 passes only the cathodes 26, but not the dielectric 18 and the working gap 28.
  • the hydrogen gas formed on the cathodes 26 does not reach the dielectric 18 and also not to the inner surface 16 to be polished, which on the one hand prevents that Dielectric 18 is loaded with hydrogen gas and on the other hand harmful effects of the hydrogen on the inner surface 16 are avoided.

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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)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (8)

1. Dispositif de polissage et/ou de décapage électrochimique(s) des surfaces intérieures (16) de tubes (10) montés comme anodes au moyen d'un courant d'électrolyte (22), comprenant
- une tête de polissage (12),
- des moyens (14) destinés à déplacer la tête de polissage (12) à travers le tube (10),
- des conduites d'alimentation (14; 25) en électrolyte et en courant électrique vers la tête de polissage (12), et
- une cathode (26), disposée à l'intérieur de la tête de polissage (12), charactérisé en ce que l'on a disposé entre la cathode (26) et la surface intérieure (16) du tube (10) un diélectrique (18) qui est perméable à l'électrolyte et laisse exister entre lui-même et la surface intérieure (16) du tube (10) un interstice (28) pour le courant d'électrolyte (22', 32).
2. Dispositif selon la revendication 1, caractérisé en ce que la tête de polissage (12) a une forme sensiblement cylindrique, le diélectrique (18) formant au moins une partie de la chemise du cylindre.
3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'on a prévu des moyens (14; 25, 26) qui divisent le courant d'électrolyte (22) qui entre dans la tête de polissage (12) en un courant partiel anodique (32) et un courant partiel cathodique (30), et ce de telle façon que le courant partiel anodique passe par le diélectrique (18) et la surface intérieure (16) du tube, mais pas par la cathode (26), alors que le courant partiel cathodique (30) passe par la cathode (26), mais pas par la surface intérieure (16) du tube.
. 4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tête de polissage (12) est reliée à un guidage (14) qui est réalisé sous la forme d'un tube et dans lequel s'étendent les conduites électriques (25) de la tête de polissage.
5. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la tête de polissage (12) est alimentée en électrolyte ainsi qu'en courant électrique au moyen d'un tuyau élastique et est tirée à travers le tube (10) au moyen d'une barre ou d'une corde.
6. Procédé de polissage et/ou de décapage électrochimique(s) de surfaces intérieures (16) de tubes, procédé dans lequel un électrolyte passe par la surface intérieure du tube, montée comme anode, caractérisé en ce que le courant d'électrolyte (22) est pompé pour entrer dans une tête de polissage (12) munie d'une cathode (26) et, en sortant de ladite tête, pour passer à travers un diélectrique (18) et dans un gap de travail (28) défini entre le diélectrique et la surface intérieure (16) du tube.
7. Procédé selon la revendication 6, caractérisé en ce que le courant d'électrolyte (22) est divisé dans la tête de polissage (12) en un courant partiel anodique (32) et un courant partiel cathodique (30), le courant partiel anodique passant par le diélectrique (18) et la surface intérieure (16) du tube, mais pas par la cathode (26), le courant partiel cathodique (30), par contre, passant par la cathode (26), mais pas par le diélectrique et la surface intérieure (16) du tube.
8. Procédé selon l'une quelconque des revendications 6 ou 7, caractérisé en ce que la tête de polissage (12) est déplacée à travers le tube (10).
EP86106812A 1986-05-20 1986-05-20 Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes Expired - Lifetime EP0247209B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP86106812A EP0247209B1 (fr) 1986-05-20 1986-05-20 Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes
AT86106812T ATE54681T1 (de) 1986-05-20 1986-05-20 Vorrichtung und verfahren zum elektrochemischen polieren der innenflaechen von rohren.
DE8686106812T DE3672831D1 (de) 1986-05-20 1986-05-20 Vorrichtung und verfahren zum elektrochemischen polieren der innenflaechen von rohren.
US07/047,653 US4772367A (en) 1986-05-20 1987-05-08 Apparatus for and a method of electrochemically polishing pipe inside surfaces
JP62120323A JPH0765240B2 (ja) 1986-05-20 1987-05-19 管の内面を電気化学的に研摩および／または酸洗する方法および装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86106812A EP0247209B1 (fr) 1986-05-20 1986-05-20 Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes

Publications (2)

Publication Number Publication Date
EP0247209A1 EP0247209A1 (fr) 1987-12-02
EP0247209B1 true EP0247209B1 (fr) 1990-07-18

Family

ID=8195133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106812A Expired - Lifetime EP0247209B1 (fr) 1986-05-20 1986-05-20 Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes

Country Status (5)

Country Link
US (1) US4772367A (fr)
EP (1) EP0247209B1 (fr)
JP (1) JPH0765240B2 (fr)
AT (1) ATE54681T1 (fr)
DE (1) DE3672831D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201619B2 (en) 2005-12-21 2012-06-19 Exxonmobil Research & Engineering Company Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery
US8286695B2 (en) 2005-12-21 2012-10-16 Exxonmobil Research & Engineering Company Insert and method for reducing fouling in a process stream
DE102016100558A1 (de) * 2016-01-14 2017-07-20 Plasotec Gmbh Polierkopf und Verfahren zum Plasmapolieren einer Innenfläche eines Werkstücks
EP4309811A1 (fr) * 2022-07-18 2024-01-24 Hammann GmbH Procédé d'élimination électromécanique des dépôts dans les conduites tubulaire ou les appareils

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0730692Y2 (ja) * 1988-11-14 1995-07-12 石川島播磨重工業株式会社 小口径管内面の電解腐食装置
JPH0794090B2 (ja) * 1989-11-01 1995-10-11 工業技術院長 小径管内面の電解砥粒超鏡面仕上げ方法
JPH06959B2 (ja) * 1989-11-22 1994-01-05 工業技術院長 高速電解粗仕上げ法
US5413463A (en) * 1991-12-30 1995-05-09 General Electric Company Turbulated cooling passages in gas turbine buckets
US5320721A (en) * 1993-01-19 1994-06-14 Corning Incorporated Shaped-tube electrolytic polishing process
US5507923A (en) * 1993-11-09 1996-04-16 Stouse; Henry J. Method and apparatus for electrolytic polishing of tubular products
US5819400A (en) * 1996-06-25 1998-10-13 Smith & Wesson Corp. Method of manufacturing an electrode assembly for electrochemically etching rifling in gun barrels
US6168691B1 (en) * 1996-08-09 2001-01-02 Atotech Deutschland Gmbh Device for electrochemical treatment of elongate articles
US6217726B1 (en) * 1997-05-22 2001-04-17 Therma Corporation, Inc. Tube inner surface electropolishing device with electrolyte dam
US5958195A (en) * 1997-05-22 1999-09-28 Therma Corporation, Inc. Tube inner surface electropolishing device
JPH11138350A (ja) * 1997-11-10 1999-05-25 Kobe Steel Ltd アルミ中空押出形材の円筒部内面の研磨方法及び装置並びにアルミ中空押出形材
IT1311147B1 (it) * 1999-11-04 2002-03-04 Edk Res Ag Macchina per pulizia localizzata con cella, elettrolitica e/o adultrasuoni, di decapaggio e/o lucidatura
US6402908B1 (en) 2000-02-02 2002-06-11 Therma Corporation, Inc. Pipe electropolishing apparatus using an electrolyte heater and cooler
US6277264B1 (en) 2000-02-02 2001-08-21 Therma Corporation, Inc. System and method for using multiple lead connections in an electropolishing process
US6547950B1 (en) 2000-02-02 2003-04-15 Therma Corporation, Inc. Cathode rinsing station and method
US6523615B2 (en) 2000-03-31 2003-02-25 John Gandy Corporation Electropolishing method for oil field tubular goods and drill pipe
US6712668B2 (en) 2000-12-06 2004-03-30 Therma Corporation, Inc. System and method for electropolishing nonuniform pipes
US6428681B1 (en) 2000-12-06 2002-08-06 Therma Corporation, Inc. System and method for reversing electrolyte flow during an electropolishing operation
TW572063U (en) * 2001-11-28 2004-01-11 Ind Tech Res Inst An electropolishing process means for an inner surface of a long tube
TW530717U (en) * 2001-12-13 2003-05-01 Ind Tech Res Inst An apparatus for electrolyzing polishing/grinding internal surface of long tube
US8492489B2 (en) 2004-02-13 2013-07-23 Total Petrochemicals Research Feluy Double loop technology
WO2010142550A1 (fr) * 2009-06-08 2010-12-16 Novo Nordisk A/S Procédé de fabrication d'une canule à aiguille dont les propriétés d'écoulement sont améliorées
US20190177872A1 (en) * 2016-06-21 2019-06-13 Extrude Hone Gmbh Electrolytic polishing method and device and method for producing a cathode
US10864567B2 (en) 2018-04-17 2020-12-15 Government Of The United States As Represented By The Secretary Of The Army Systems and methods for electroprocessing a gun barrel using a moving electrode
CN115122227B (zh) * 2022-06-20 2023-06-27 沈阳理工大学 一种金属管类零件异形截面螺旋深孔内表面移动式等离子电化学抛光装置

Family Cites Families (10)

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US2764540A (en) * 1952-09-10 1956-09-25 William G Farin Method and means for electropolishing inner surfaces
DE1202607B (de) * 1961-01-20 1965-10-07 Nyby Bruk Ab Verfahren zur anodischen Oberflaechenbehandlung von Metallgegenstaenden
US3202598A (en) * 1963-03-22 1965-08-24 Titanium Metals Corp Electrolytic polishing tool
DE1496727B2 (de) * 1963-06-18 1972-03-02 Benteler Werke AG, Werk Neuhaus, 4794 Schloß Neuhaus Verfahren zur elektrolytischen behandlung der innen und aussenflaeche von rohren
JPS5691380U (fr) * 1979-12-14 1981-07-21
US4369101A (en) * 1980-05-02 1983-01-18 Nukem Gmbh Apparatus for electropolishing tubes
JPS6050878A (ja) * 1983-08-30 1985-03-20 日本電気株式会社 コネクタ
DE3343396A1 (de) * 1983-11-30 1985-06-05 Kraftwerk Union AG, 4330 Mülheim Verfahren zum dekontaminieren metallischer komponenten einer kerntechnischen anlage
FR2561672B1 (fr) * 1984-03-21 1989-09-01 Travaux Milieu Ionisant Dispositif d'electrolyse, utilisable notamment pour la decontamination radioactive de surfaces metalliques
US4601802A (en) * 1984-07-31 1986-07-22 The Upjohn Company Apparatus for internally electropolishing tubes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201619B2 (en) 2005-12-21 2012-06-19 Exxonmobil Research & Engineering Company Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery
US8286695B2 (en) 2005-12-21 2012-10-16 Exxonmobil Research & Engineering Company Insert and method for reducing fouling in a process stream
US8469081B2 (en) 2005-12-21 2013-06-25 Exxonmobil Research And Engineering Company Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery
DE102016100558A1 (de) * 2016-01-14 2017-07-20 Plasotec Gmbh Polierkopf und Verfahren zum Plasmapolieren einer Innenfläche eines Werkstücks
DE102016100558B4 (de) 2016-01-14 2023-08-10 Plasotec Gmbh Polierkopf und Verfahren zum Plasmapolieren einer Innenfläche eines Werkstücks
EP4309811A1 (fr) * 2022-07-18 2024-01-24 Hammann GmbH Procédé d'élimination électromécanique des dépôts dans les conduites tubulaire ou les appareils

Also Published As

Publication number Publication date
JPS62290899A (ja) 1987-12-17
JPH0765240B2 (ja) 1995-07-12
EP0247209A1 (fr) 1987-12-02
US4772367A (en) 1988-09-20
DE3672831D1 (de) 1990-08-23
ATE54681T1 (de) 1990-08-15

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