EP0695818A1 - Procédé et dispositif pour traitement de surface électrolytique - Google Patents

Procédé et dispositif pour traitement de surface électrolytique Download PDF

Info

Publication number
EP0695818A1
EP0695818A1 EP95250142A EP95250142A EP0695818A1 EP 0695818 A1 EP0695818 A1 EP 0695818A1 EP 95250142 A EP95250142 A EP 95250142A EP 95250142 A EP95250142 A EP 95250142A EP 0695818 A1 EP0695818 A1 EP 0695818A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
strip
electrolyte
working electrodes
surface treatment
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
EP95250142A
Other languages
German (de)
English (en)
Other versions
EP0695818B1 (fr
Inventor
Franz Gerhard Ing. Pempera
Michael Dipl.-Ing. Haentjes
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0695818A1 publication Critical patent/EP0695818A1/fr
Application granted granted Critical
Publication of EP0695818B1 publication Critical patent/EP0695818B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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 electrolytic surface treatment method and a device for carrying out the method, in particular for pickling, cleaning and degreasing snow-running metal strips, preferably cold-rolled steel strip, consisting of at least one container holding the electrolyte through which the strip passes horizontally, above and below the Band in the tape running direction electrodes are arranged one behind the other, which are alternately connected anodically or cathodically.
  • EP-A-02 35 595 A known system of this type is described in EP-A-02 35 595. It is used to clean tapes and is used in combination with mechanical agents that act on the tape surface.
  • the entire electrolytic process is usually carried out in at least one container in which the electrolyte necessary for the electrolytic process and covering the electrodes and also the tape is contained.
  • the electrolyte is usually supplied to the container by means of pumps.
  • the electrodes arranged above and below the band are generally referred to as working electrodes, to which the band acts as a counter electrode. This process is also known as the middle conductor process. If, as is known, the electrodes on both sides of the tape have the same polarity, then all points on the tape surface, regardless of which side of the tape they are on, have the same polarity. If the working electrodes are all positive (anodic), the strip surface acts as a negative pole (cathode) - or vice versa.
  • the invention is based on the object of creating an electrolytic surface treatment method and a system for carrying out the method, with which an effective surface treatment of the strip can be carried out in a short time and with little contamination of the electrolyte can be.
  • the areas between two adjacent electrodes of different circuitry and the top and bottom of the strip are kept free of electrolytes, since only such (galvanic) separation avoids a "leakage current" between the working electrodes.
  • the invention is based on the idea that if the bridge between the cathode and the anode (the working electrode) formed by the electrolyte can be broken, no or only a small electric current can flow directly from the cathode to the anode. This increases the effectiveness of the system because the entire electrical current is now available for the strip treatment, so that a more effective treatment and thus shorter treatment times can be achieved. If, according to the invention, the areas between the band and the neighboring electrodes are kept free of electrolyte, then no impurities can be transported with the band into the next electrolyte half cell.
  • the electrolyte is displaced from the region between two adjacent electrodes.
  • the electrolyte is displaced and the area between two laterally adjacent working electrodes is kept clear in a system for carrying out the method in that several nozzle bars arranged between the working electrodes for injecting electrolyte liquid obliquely to the strip surface and in the direction of the respectively adjacent working electrodes are arranged.
  • electrolyte liquid By injecting electrolyte liquid under pressure, the in the area between the Working electrodes and the band and the adjacent working electrodes displaced liquid, so that with correct arrangement of the nozzle bars, the space between two nozzle bars remains free of liquid.
  • Each pair of electrodes is preferably assigned four nozzle bars, which act in pairs on the top and bottom of the strip.
  • the arrangement of the nozzle bars in front of and behind an electrode pack on the one hand seals the affected area in the direction of strip travel, and on the other hand the resulting turbulence between the working electrode and the strip considerably facilitates the current transfer through the electrolyte and thus optimizes the actual treatment step accordingly.
  • an overflow is provided above each electrode stack, via which the amount from the nozzle assemblies is fed back to the associated storage container.
  • the amount or pressure of the injected electrolyte for guiding the strip relative to the electrodes can be adjusted.
  • the injection of the electrolyte provided above and below the band simultaneously guides the band a short distance of, for example, 20 to 60 mm between the band and the electrodes.
  • the distance can be varied by changing the amount or pressure of the electrolyte.
  • 1 denotes a container through which the band 2 to be treated is passed in the horizontal direction.
  • deflection and guide rollers 3 and 4 are indicated, which define the position of the belt in the container.
  • 5 and 6 denote 2 working electrodes arranged above and below the strip, which are connected anodically at 5 and at 6 cathodically. As can be seen, anodically switched working electrodes alternate with cathodically connected working electrodes in the longitudinal direction of the strip.
  • FIG. 1 shows the solution of the invention, the same parts being labeled the same.
  • each working electrode 5, 6 is assigned a nozzle tube, which is arranged at an angle to the working electrode 5, 6 and directed towards the strip surface and is injected by the electrolyte. This will cause the electrolyte in the area of opposite working electrodes 5, 6 are held, while in the band area 9 between the neighboring working electrodes or pairs of working electrodes the band to be treated is almost free of electrolyte on the surface.
  • Additional partition walls 10 in the container divide the container 1 into areas so that contamination of the electrolyte is limited to the container area below the respective working electrode package.
  • the invention ensures that the areas 9 between the working electrode pairs 8 are kept free of electrolyte, so that short-circuit currents can no longer flow between the cathode and anode of the working electrodes connected in series. This maintains the full electrical effect for treating the tape. In this way, not only can the quality of the surface treatment process be improved, but the treatment speed can also be increased, and the productivity of the system can thus be increased.

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)
EP95250142A 1994-07-07 1995-06-14 Procédé et dispositif pour traitement de surface électrolytique Expired - Lifetime EP0695818B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425854 1994-07-07
DE4425854A DE4425854C1 (de) 1994-07-07 1994-07-07 Elektrolytisches Oberflächenbehandlungsverfahren und Anlage zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP0695818A1 true EP0695818A1 (fr) 1996-02-07
EP0695818B1 EP0695818B1 (fr) 1998-04-08

Family

ID=6523791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250142A Expired - Lifetime EP0695818B1 (fr) 1994-07-07 1995-06-14 Procédé et dispositif pour traitement de surface électrolytique

Country Status (5)

Country Link
US (1) US5584984A (fr)
EP (1) EP0695818B1 (fr)
JP (1) JP3813998B2 (fr)
DE (2) DE4425854C1 (fr)
FI (1) FI110367B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7045053B2 (en) 2000-09-22 2006-05-16 Danieli & C.Officine Meccaniche S.P.A. Process and apparatus for the superficial electrolytic treatment of metal strips

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660708A (en) * 1994-11-21 1997-08-26 Sumitomo Metal Mining Company, Limited Process for manufacturing a lead frame
DE19702639C1 (de) * 1997-01-25 1998-06-18 Sundwiger Eisen Maschinen Vorrichtung und Verfahren zum kontinuierlichen chemischen Entzundern von Metallband
JP2000064100A (ja) 1998-08-24 2000-02-29 Hitachi Ltd 鋼帯の脱スケ−ル装置及び鋼帯の製造装置
US6203691B1 (en) 1998-09-18 2001-03-20 Hoffman Industries International, Ltd. Electrolytic cleaning of conductive bodies
US6265020B1 (en) * 1999-09-01 2001-07-24 Shipley Company, L.L.C. Fluid delivery systems for electronic device manufacture
DE102004029894B3 (de) * 2004-06-17 2005-12-22 Atotech Deutschland Gmbh Vorrichtung und Verfahren zum elektrolytischen Behandeln von elektrisch gegeneinander isolierten, elektrisch leitfähigen Strukturen auf Oberflächen von flachem Behandlungsgut
AT413707B (de) * 2004-07-19 2006-05-15 Voest Alpine Ind Anlagen Verfahren und vorrichtung zum beizen von metallen
ITMI20130497A1 (it) * 2013-03-29 2014-09-30 Tenova Spa Apparato per il trattamento elettrolitico superficiale in continuo di semilavorati metallici, in particolare semilavorati metallici piatti.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926767A (en) * 1975-01-21 1975-12-16 United States Steel Corp Electrolytic treating apparatus
EP0235595A2 (fr) 1986-03-01 1987-09-09 Hoesch Stahl Aktiengesellschaft Procédé, installation et dispositif de dégraissage et de nettoyage en continu de bandes de métaux, en particulier de bandes d'acier laminées à froid
WO1992006231A2 (fr) * 1990-10-08 1992-04-16 Le Four Industriel Belge S.A. Procede et dispositif de decapage, ainsi que procede et installation de galvanisation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165326A (en) * 1934-10-30 1939-07-11 Hanson Van Winkle Munning Co Electrolytic treatment of ferrous metals
US3558460A (en) * 1966-01-26 1971-01-26 Nippon Steel Corp Process for surface treatment of steel strip
CH594067A5 (fr) * 1973-10-04 1977-12-30 Galentan Ag
JPS5594492A (en) * 1979-01-12 1980-07-17 Nippon Kokan Kk <Nkk> Fluidizing method for liquid by jet stream between parallel flat board
GB2147009B (en) * 1983-09-07 1987-11-18 Sumitomo Metal Ind Method and apparatus for continuous electroplating of alloys

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926767A (en) * 1975-01-21 1975-12-16 United States Steel Corp Electrolytic treating apparatus
EP0235595A2 (fr) 1986-03-01 1987-09-09 Hoesch Stahl Aktiengesellschaft Procédé, installation et dispositif de dégraissage et de nettoyage en continu de bandes de métaux, en particulier de bandes d'acier laminées à froid
WO1992006231A2 (fr) * 1990-10-08 1992-04-16 Le Four Industriel Belge S.A. Procede et dispositif de decapage, ainsi que procede et installation de galvanisation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7045053B2 (en) 2000-09-22 2006-05-16 Danieli & C.Officine Meccaniche S.P.A. Process and apparatus for the superficial electrolytic treatment of metal strips

Also Published As

Publication number Publication date
JPH08100299A (ja) 1996-04-16
DE59501827D1 (de) 1998-05-14
FI953316A (fi) 1996-01-08
US5584984A (en) 1996-12-17
FI953316A0 (fi) 1995-07-05
EP0695818B1 (fr) 1998-04-08
JP3813998B2 (ja) 2006-08-23
FI110367B (fi) 2002-12-31
DE4425854C1 (de) 1995-11-09

Similar Documents

Publication Publication Date Title
DE2234424C3 (de) Verfahren und Vorrichtung zur einseitigen kontinuierlichen elektrolytischen Aufrauhung und/oder Oxidation von Aluminiumbändern
DE2533319C2 (fr)
DE4425854C1 (de) Elektrolytisches Oberflächenbehandlungsverfahren und Anlage zur Durchführung des Verfahrens
DE3246690C2 (fr)
AT399167B (de) Verfahren und vorrichtung zum elektrolytischen beizen von kontinuierlich durchlaufendem elektrisch leitendem gut
EP0741804B1 (fr) Procede et dispositif de metallisation ou d&#39;attaque electrolytiques d&#39;articles a traiter
DE2917383A1 (de) Verfahren und vorrichtung zur kontinuierlichen elektrochemischen behandlung eines metallbandes
DE2208076A1 (de) Verfahren zur elektrolytischen Behandlung von Industrieabwässern und Vorrichtung zur Durchführung desselben
DE102008063187A1 (de) Anodisierungsvorrichtung
EP0039453B1 (fr) Dispositif d&#39;électrodéposition
DE2131473C2 (de) Leiteranordnung zum Kompensieren schädlicher magnetischer Einflüsse von Reihen elektrolytischer Zellen auf benachbarte Zellenreihen
DE1598110A1 (de) Vorrichtung zur Elektrophoreses
DE1496714A1 (de) Verfahren und Vorrichtung fuer die anodische Oxydation von Aluminium
DE1496727B2 (de) Verfahren zur elektrolytischen behandlung der innen und aussenflaeche von rohren
DE2904441A1 (de) Stromschienensystem von elektrolysezellen zur aluminiumherstellung
DE4315117C2 (de) Einrichtung zur Reinigung und Aufbereitung von Schmutzwässern mittels Elektrolyse
EP0686603A1 (fr) Procédé et dispositif pour séparer des matières solides et liquides contenus dans des eaux usées industrielles par électroflottation
EP0801153B1 (fr) Procédé et dispositif pour le traitement électrolytique d&#39;objets transportés en continu
EP0033714B1 (fr) Disposition de barres d&#39;amenée de courant pour cellules d&#39;électrolyse
DE3521109A1 (de) Verfahren und vorrichtung zur galvanomagnetischen entfernung von ionen aus einer fluessigkeit
DE60104148T2 (de) Verfahren und vorrichtung zur elektrolytischen oberflächenbehandlung von metallstreifen
DE2912889A1 (de) Verfahren fuer die elektroraffination von blei sowie vorrichtung zur durchfuehrung desselben
DE3901807A1 (de) Vorrichtung zum elektrolytischen abscheiden von metallen auf einer oder beiden seiten von baendern
DE10215463C1 (de) Durchlaufanlage und Verfahren zum elektrolytischen Metallisieren von Werkstück
DE3206457C2 (fr)

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

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19951227

17Q First examination report despatched

Effective date: 19961111

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980417

ITF It: translation for a ep patent filed

Owner name: GUZZI E RAVIZZA S.R.L.

REF Corresponds to:

Ref document number: 59501827

Country of ref document: DE

Date of ref document: 19980514

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
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20120621

Year of fee payment: 18

Ref country code: GB

Payment date: 20120622

Year of fee payment: 18

Ref country code: FR

Payment date: 20120705

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120628

Year of fee payment: 18

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

Ref country code: SE

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

Effective date: 20130615

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20130614

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140228

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

Ref country code: GB

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

Effective date: 20130614

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: 20130701

Ref country code: IT

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

Effective date: 20130614

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140619

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59501827

Country of ref document: DE