EP0074464A1 - Dispositif pour le nettoyage de parois intérieures des systèmes tubulaires métalliques par polissage électrolytique à l'aide d'électrodes agitées - Google Patents

Dispositif pour le nettoyage de parois intérieures des systèmes tubulaires métalliques par polissage électrolytique à l'aide d'électrodes agitées Download PDF

Info

Publication number
EP0074464A1
EP0074464A1 EP82104946A EP82104946A EP0074464A1 EP 0074464 A1 EP0074464 A1 EP 0074464A1 EP 82104946 A EP82104946 A EP 82104946A EP 82104946 A EP82104946 A EP 82104946A EP 0074464 A1 EP0074464 A1 EP 0074464A1
Authority
EP
European Patent Office
Prior art keywords
electrode
electropolishing
cleaning
inner walls
area
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.)
Granted
Application number
EP82104946A
Other languages
German (de)
English (en)
Other versions
EP0074464B1 (fr
Inventor
Manfred Kienhöfer
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.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Kernforschungszentrum Karlsruhe 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 Kernforschungszentrum Karlsruhe GmbH filed Critical Kernforschungszentrum Karlsruhe GmbH
Publication of EP0074464A1 publication Critical patent/EP0074464A1/fr
Application granted granted Critical
Publication of EP0074464B1 publication Critical patent/EP0074464B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002—Decontamination of the surface of objects with chemical or electrochemical processes
    • G21F9/004—Decontamination of the surface of objects with chemical or electrochemical processes of metallic surfaces
    • 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 method for cleaning the inner walls of metallic line systems by electropolishing with the aid of moving electrodes and a device for carrying out the method.
  • the invention has for its object to provide a method and a device with which (which) a metallic pipe system can be cleaned, without having to dismantle it.
  • pipe system should be understood here: a system of straight and curved pipes, including the associated shut-off devices, such as ball valves, slides or the like.
  • the process should also be able to successfully clean rising and falling pipes immediately.
  • the method and the device should be usable in particular for the decontamination of radioactive contaminated line systems.
  • the object is achieved in that the electrolyte is poured into the section of the pipe system to be cleaned and the electrolysis is carried out with the aid of an elastic electrode consisting of spiral wire or a coiled strip.
  • the device according to the invention for carrying out the method is characterized by an elastic electrode consisting of a spiral wire or a coiled ribbon, and by a plurality of insulating spacers, which are arranged on the electrode in a fixed or displaceable manner, at least in the electrode area.
  • the device there is a spacer at the head and at the other end of the electrode with an area that is greater by a factor of> 1 than that of the spacer (s) within the electrode area, but smaller area than the smallest corresponds to the traversed cross section of the line system.
  • the electrodes Due to the elasticity of the electrodes, an adaptation to curved surfaces is possible. As a result, disassembly of the pipes to be polished is no longer necessary, and it is possible to work with elbows and sliders as well as in inclined lines.
  • FIG. 2 Another embodiment of the device according to the invention is shown in FIG. 2, in which the electrode 4 a is designed in the form of a coiled stainless steel strip.
  • an approximately 300 mm long electrode 4a was produced, which was fitted with spacers 5 and 6 made of Teflon. So that one with radioactive contamination Contaminated pipe system 1 made of stainless steel, consisting of 3x1 m long pipes, 0 100 mm, 2 elbows and 1 ball valve on the inside can be freed of its radioactive contamination by electropolishing.
  • the line system 1 was placed in a large tub which was filled with an electrolyte of phosphoric and sulfuric acid, and the electrode 4a was pulled through at a speed of 5 cm / min. Direct current of 10-20 A / dm 2 was used. In this way it was possible to achieve a decontamination factor of around 500.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Cleaning In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electrolytic Production Of Metals (AREA)
EP82104946A 1981-09-12 1982-06-05 Dispositif pour le nettoyage de parois intérieures des systèmes tubulaires métalliques par polissage électrolytique à l'aide d'électrodes agitées Expired EP0074464B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3136186 1981-09-12
DE19813136186 DE3136186A1 (de) 1981-09-12 1981-09-12 Verfahren und vorrichtung zur reinigung der innenwaende von metallischen leitungssystemen durch elektropolieren mit hilfe bewegter elektroden

Publications (2)

Publication Number Publication Date
EP0074464A1 true EP0074464A1 (fr) 1983-03-23
EP0074464B1 EP0074464B1 (fr) 1985-08-07

Family

ID=6141459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104946A Expired EP0074464B1 (fr) 1981-09-12 1982-06-05 Dispositif pour le nettoyage de parois intérieures des systèmes tubulaires métalliques par polissage électrolytique à l'aide d'électrodes agitées

Country Status (3)

Country Link
EP (1) EP0074464B1 (fr)
JP (1) JPS5855599A (fr)
DE (1) DE3136186A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645581A (en) * 1984-08-17 1987-02-24 Kraftwerk Union Aktiengesellschaft Apparatus for electropolishing the inner surface of U-shaped heat exchanger tubes
WO2017036561A1 (fr) * 2015-09-04 2017-03-09 Poligrat Gmbh Dispositif d'électrode pour un traitement électrochimique d'une pièce
CN113089073A (zh) * 2021-03-30 2021-07-09 中国工程物理研究院机械制造工艺研究所 电化学抛光用柔性电极及内腔结构电化学抛光方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6483697A (en) * 1987-09-28 1989-03-29 Oe Kogyo Kk Method for electropolishing inner surface of straight tube or bent tube with coiled electrode

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1931174A1 (de) * 1969-06-19 1971-01-07 Siemens Ag Einrichtung zum elektrolytischen Polieren von Kernbrennstabhuellrohren
DE2435277B1 (de) * 1974-07-23 1975-04-10 Langbein-Pfanhauser Werke Ag, 4040 Neuss Anode für die galvanische Behandlung eines Hohlprofils
DE2146794B2 (de) * 1971-09-18 1976-08-05 Siemens AG, 1000 Berlin und 8000 München Verfahren und vorrichtung zum anodischen polieren von niobteilen
DE2313026B2 (de) * 1973-03-15 1977-03-03 Siemens AG, 1000 Berlin und 8000 München Verfahren zum anodischen polieren der innenflaeche eines niobhohlkoerpers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1209242A (fr) * 1958-07-09 1960-02-29 Jacquet Hispano Suiza Perfectionnements apportés aux procédés et appareils pour les traitements électrolytiques des tubes, plus spécialement pour le polissage
CH396561A (de) * 1960-10-06 1965-07-31 Nyby Bruk Ab Verfahren zum elektrolytischen Polieren von Oberflächen metallischer Gegenstände

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1931174A1 (de) * 1969-06-19 1971-01-07 Siemens Ag Einrichtung zum elektrolytischen Polieren von Kernbrennstabhuellrohren
DE2146794B2 (de) * 1971-09-18 1976-08-05 Siemens AG, 1000 Berlin und 8000 München Verfahren und vorrichtung zum anodischen polieren von niobteilen
DE2313026B2 (de) * 1973-03-15 1977-03-03 Siemens AG, 1000 Berlin und 8000 München Verfahren zum anodischen polieren der innenflaeche eines niobhohlkoerpers
DE2435277B1 (de) * 1974-07-23 1975-04-10 Langbein-Pfanhauser Werke Ag, 4040 Neuss Anode für die galvanische Behandlung eines Hohlprofils

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645581A (en) * 1984-08-17 1987-02-24 Kraftwerk Union Aktiengesellschaft Apparatus for electropolishing the inner surface of U-shaped heat exchanger tubes
WO2017036561A1 (fr) * 2015-09-04 2017-03-09 Poligrat Gmbh Dispositif d'électrode pour un traitement électrochimique d'une pièce
CN113089073A (zh) * 2021-03-30 2021-07-09 中国工程物理研究院机械制造工艺研究所 电化学抛光用柔性电极及内腔结构电化学抛光方法

Also Published As

Publication number Publication date
EP0074464B1 (fr) 1985-08-07
JPS5855599A (ja) 1983-04-01
DE3136186C3 (fr) 1985-03-07
DE3136186A1 (de) 1983-03-24

Similar Documents

Publication Publication Date Title
EP0247209B1 (fr) Dispositif et procédé de polissage électrochimique de surfaces intérieures de tubes
DE1931174A1 (de) Einrichtung zum elektrolytischen Polieren von Kernbrennstabhuellrohren
DE3136187C2 (de) Verfahren und Vorrichtung zur Reinigung der Innenwände von metallischen Leitungssystemen durch Elektropolieren mit Hilfe bewegter Elektroden
EP0171717A1 (fr) Procédé et dispositif pour le polissage électrolytique des surfaces internes de tubes d'échangeurs de chaleur en forme d'U
AT411693B (de) Elektrochemisches verfahren zum reinigen von oberflächen metallischer werkstücke
EP0203583A2 (fr) Dispositif pouvant être glissé et orienté dans un tuyau
EP0074464B1 (fr) Dispositif pour le nettoyage de parois intérieures des systèmes tubulaires métalliques par polissage électrolytique à l'aide d'électrodes agitées
DE3825533A1 (de) Verfahren und vorrichtung zur innenbehandlung metallener rohre
DE2810352C2 (de) Einrichtung zur Überwachung der Korrosion
DE2606984B2 (de) Verfahren und einrichtung zum chemischen reinigen von kontaktierungsloechern in leiterplatten
DE4315117C2 (de) Einrichtung zur Reinigung und Aufbereitung von Schmutzwässern mittels Elektrolyse
DE3826257A1 (de) Verfahren und vorrichtung zur aetzbearbeitung langer metallrohre
DE3500750C2 (fr)
EP0314053B1 (fr) Dispositif pour le renforcement par électrodéposition d'une ligne conductrice sur une vitre
DE19846591A1 (de) Vorrichtung und Verfahren zur Umspülung von Stabelementen
DE2830486A1 (de) Stromleiter-verbindungsorgan fuer einen abbrennstumpfschweissapparat
EP0020318A1 (fr) Dispositif de fabrication de treillis soudés en fils métalliques se croisant mutuellement, au moyen de la méthode de soudage électrique par résistance
DE1228492B (de) Vorrichtung zum Reinigen, Beizen und Entzundern von Metallrohren mittels Ultraschall
DE3006614A1 (de) Vorrichtung zur reinigung des bodens von elektrolytischen quecksilberkathodenzellen u.dgl.
EP1060827B1 (fr) Méthode et appareil pour le traitement des faces intérieures de tubes métalliques
DE10022083A1 (de) Verfahren und Einrichtung zum Beizen von Edelstahlwarmbändern
EP0278256A1 (fr) Procédé et dispositif pour éliminer les couches d'oxydes
DE3539278C2 (fr)
DE3207135A1 (de) Verfahren zur reinigung der innenflaeche von in ringform vorliegenden metallrohren
DD238631A1 (de) Vorrichtung zur elektrolytischen behandlung metallischer hohlzylinder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH FR GB LI NL

17P Request for examination filed

Effective date: 19830228

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH FR GB LI NL

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870630

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880226

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19880605

BERE Be: lapsed

Owner name: KERNFORSCHUNGSZENTRUM KARLSRUHE G.M.B.H.

Effective date: 19880630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19890101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19890630

Ref country code: CH

Effective date: 19890630

Ref country code: BE

Effective date: 19890630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL