EP0362924A1 - Vorrichtung zur kontinuierlichen elektrolytischen Behandlung von Gegenständen in Form von Draht - Google Patents

Vorrichtung zur kontinuierlichen elektrolytischen Behandlung von Gegenständen in Form von Draht Download PDF

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Publication number
EP0362924A1
EP0362924A1 EP89202386A EP89202386A EP0362924A1 EP 0362924 A1 EP0362924 A1 EP 0362924A1 EP 89202386 A EP89202386 A EP 89202386A EP 89202386 A EP89202386 A EP 89202386A EP 0362924 A1 EP0362924 A1 EP 0362924A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
accordance
objects
anodes
bath
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
EP89202386A
Other languages
English (en)
French (fr)
Other versions
EP0362924B1 (de
Inventor
Mario Catteeuw
Pierre Cosaert
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.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
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 Bekaert NV SA filed Critical Bekaert NV SA
Publication of EP0362924A1 publication Critical patent/EP0362924A1/de
Application granted granted Critical
Publication of EP0362924B1 publication Critical patent/EP0362924B1/de
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
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0607—Wires
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • 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
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • 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 an apparatus for the continuous electrolytic treatment of wire-shaped objects such as e.g. filaments, yarns, cables or strip-shaped bands or ribbons.
  • This treatment can be either a coating treatment or a pickling treatment.
  • the object of the invention is now to to overcome these drawbacks by immersing the supporting and current-carrying arms of the successive cathodes in the electrolyte. This precludes the formation of salt crystals and the maintenance that it entails. Besides, this set-up has the added advantage that the immersed cathode can cool down more easily. Indeed, as the wires have a relatively high running speed through the installation, high current densities are to be used which can cause the cathodes to heat up considerably. Cooling in liquid and circulating electrolyte is much more effective than air cooling such as for contact fingers or contact rollers placed above the bath or at the bath entry and exit, respectively.
  • the accessibility of the bath surface that is markedly improved in accordance with the invention is particularly advantageous upon starting the apparatus when a new series of wires is to be pulled through from entry (pay-off) to exit (take-up unit). It also improves the surveyability of the installation, which makes process control easier for the operator.
  • the objects follow a zigzag path of travel in sliding contact with the successive current-transmitting electrodes connected to one and the same pole of the power source.
  • the electrodes i.e. their parts assuring the sliding-contact, and the elements supporting them are immersed in the electrolyte bath.
  • the application of the zigzag path of travel over the sliding contacts of said electrodes precludes the tendency to sparking which occurs with state-of-the-art electrode fingers.
  • the considerable transport tension on the wires between pay-off and take-up unit guarantees a constant and even contact of the wire with the electrodes at the peaks and valleys of the zigzag path of travel. It follows that operational reliability and the assurance of a constant process quality are obtained via a strong simplification of the prior art apparatuses.
  • the treatment apparatus is an electroplating line
  • said electrodes with sliding contacts will be connected as cathodes.
  • the wires conducted against the sliding contacts then constitute the cathode in the coating line and the positive ions of the metal (e.g. zinc) to be applied will precipitate on them from the electrolyte in the path of travel at the anodes located opposite the wires.
  • the metal e.g. zinc
  • said electrodes will be connected as anodes.
  • the metal coating to be removed from the passing wires then dissolves in the electrolyte and deposits on the stationary cathodes at the path of travel of the wire near these cathodes.
  • the electrolysis apparatus in accordance with figure 1 basically comprises an elongate tank or channel 1 as electrolyte bath.
  • This bath 1 is filled with a suitable electrolyte up to level 3 so that both the anodes 4 and the cathodes 5 are immersed in it.
  • the cathode pins 5 are fixed on successive supporting arms 6, 7, 8 (e.g. of copper).
  • the successive anode sections 9, 10 are mounted between said supporting arms. Said sections comprise the supporting arms 11 (e.g. of copper) for the anode plates 4, 12. These are e.g. inert lead anodes.
  • the respective supporting arms for cathodes and anodes are connected to the current-supply bars 13 and 14.
  • the electrode-supporting parts (6, 7, 8) of these arms are immersed with the electrodes 5 in bath 1 under the bath surface 3.
  • the electrolyte can be continuously circulated by means of pumps (not shown) and through the bores 16 in the anode plates towards the surface level 3 of the bath 1.
  • the circulation increases the turbulence in the bath, which increases the electrolysis efficiency.
  • the wire-shaped objects 2 to be coated are now continuously conducted past a succession of anodes 4, 12 and cathode supports 6, 7, 8 below the electrolyte surface 3.
  • the wires drag against the pins 5 fixed on the respective current-carrying supporting arms 6, 7, 8 as a result of which they are connected as cathode, tracing a horizontal zigzag path of travel as shown in figure 2. So, the successive peaks and valleys of the zigzag path of travel are located at these pins 5.
  • the electrodes themselves comprise a highly conductive but preferably also wear-resistant metal alloy, e.g. tungsten carbide at the sliding contacts at the zigzag peak/valley positions.
  • the wires come in the vicinity of the inert anode plates 4, 12 where the desired metal deposition from the bath 1 takes place.
  • the anode plates 4, 12 can be designed flat but will preferably comprise channel-shaped recesses 15 (as sketched in figure 3) at the path of travel of the wires 2 between two consecutive cathode pins 5. This way, a more even metal deposition is obtained over the whole wire circumference.
  • Figure 4 schematically shows another nearly horizontal zigzag path of travel for the wires 2.
  • An insulated (ceramic) counterpressure bar 17 or 18 is mounted near each cathode-supporting arm 6 or 7 respectively. These can e.g. be tilted upwards out of and away from the bath for the purpose of making the bath surface easily accessible when starting the apparatus for a new series of wires.
  • the cathode-supporting arms 6, 7 are each coated with a wear-resistant layer 19 as sliding contact for the transmission of current to the wires.

Landscapes

  • 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)
  • Coating With Molten Metal (AREA)
EP89202386A 1988-10-06 1989-09-21 Vorrichtung zur kontinuierlichen elektrolytischen Behandlung von Gegenständen in Form von Draht Expired - Lifetime EP0362924B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8801152 1988-10-06
BE8801152A BE1001859A3 (nl) 1988-10-06 1988-10-06 Inrichting voor het continu electrolytisch behandelen van draadvormige voorwerpen.

Publications (2)

Publication Number Publication Date
EP0362924A1 true EP0362924A1 (de) 1990-04-11
EP0362924B1 EP0362924B1 (de) 1994-05-11

Family

ID=3883667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89202386A Expired - Lifetime EP0362924B1 (de) 1988-10-06 1989-09-21 Vorrichtung zur kontinuierlichen elektrolytischen Behandlung von Gegenständen in Form von Draht

Country Status (9)

Country Link
EP (1) EP0362924B1 (de)
JP (1) JP2859672B2 (de)
KR (1) KR0174269B1 (de)
AU (1) AU610759B2 (de)
BE (1) BE1001859A3 (de)
BR (1) BR8907111A (de)
DE (1) DE68915236T2 (de)
ES (1) ES2056196T3 (de)
WO (1) WO1990004050A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026435A1 (en) * 1993-05-08 1994-11-24 United Wire Limited Wire plating
IT201700065757A1 (it) * 2017-06-14 2018-12-14 Assembling S R L Apparecchio di trattamento filo metallico, elettrolitico od elettrochimico e cella elettrolitica utilizzata

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229423A (en) * 1937-05-18 1941-01-21 Purdue Research Foundation Electroplating apparatus for wire or the like
US2708181A (en) * 1951-05-17 1955-05-10 Indiana Steel & Wire Company I Electroplating process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609292B1 (fr) * 1987-01-06 1989-03-24 Pechiney Aluminium Procede et dispositif pour deposer electrolytiquement au defile un film continu de nickel sur du fil metallique a usage electrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229423A (en) * 1937-05-18 1941-01-21 Purdue Research Foundation Electroplating apparatus for wire or the like
US2708181A (en) * 1951-05-17 1955-05-10 Indiana Steel & Wire Company I Electroplating process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026435A1 (en) * 1993-05-08 1994-11-24 United Wire Limited Wire plating
IT201700065757A1 (it) * 2017-06-14 2018-12-14 Assembling S R L Apparecchio di trattamento filo metallico, elettrolitico od elettrochimico e cella elettrolitica utilizzata

Also Published As

Publication number Publication date
JP2859672B2 (ja) 1999-02-17
ES2056196T3 (es) 1994-10-01
BE1001859A3 (nl) 1990-03-20
AU610759B2 (en) 1991-05-23
AU4213589A (en) 1990-05-01
EP0362924B1 (de) 1994-05-11
JPH03502715A (ja) 1991-06-20
BR8907111A (pt) 1991-02-05
KR0174269B1 (ko) 1999-02-18
DE68915236T2 (de) 1994-08-18
WO1990004050A1 (en) 1990-04-19
DE68915236D1 (de) 1994-06-16
KR920700311A (ko) 1992-02-19

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