EP0875605B1 - Anordnung zur elektrogalvanischen Metallbeschichtung von Bändern - Google Patents

Anordnung zur elektrogalvanischen Metallbeschichtung von Bändern Download PDF

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Publication number
EP0875605B1
EP0875605B1 EP98107344A EP98107344A EP0875605B1 EP 0875605 B1 EP0875605 B1 EP 0875605B1 EP 98107344 A EP98107344 A EP 98107344A EP 98107344 A EP98107344 A EP 98107344A EP 0875605 B1 EP0875605 B1 EP 0875605B1
Authority
EP
European Patent Office
Prior art keywords
anode
strip
strips
arrangement
metal coating
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
EP98107344A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0875605A3 (de
EP0875605A2 (de
Inventor
Werner Schimion
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0875605A2 publication Critical patent/EP0875605A2/de
Publication of EP0875605A3 publication Critical patent/EP0875605A3/de
Application granted granted Critical
Publication of EP0875605B1 publication Critical patent/EP0875605B1/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
    • C25D7/0614—Strips or foils
    • C25D7/0642—Anodes
    • 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
    • C25D7/0614—Strips or foils
    • C25D7/0692—Regulating the thickness of the coating

Definitions

  • the invention relates to an arrangement for electrogalvanic metal coating of bands passing through a metal-enriched acidic electrolyte having at least one insoluble anode arranged parallel to the band from which the current flows to the band connected as a cathode, wherein metal from the electrolyte on the Surface of the tape is deposited, each anode is parallel to the direction of the tape divided into anode strips and each anode strip is individually powered.
  • Cold-rolled strip of normal carbon steel must be provided with a protective layer to prevent or at least greatly retard corrosion.
  • the type of protective layer depends on the purpose and the economically justifiable effort.
  • the state of the art includes u. a. galvanizing.
  • galvanizing the corrosion protection can be achieved by a metallic coating, which is applied by electrolysis.
  • Plants for applying one or both sides of such zinc layers in thicknesses of about 2.5 to 15 micrometers are known from the prior art.
  • the anodes are arranged parallel to the tape in the smallest possible distance between 5 and 30 mm.
  • the space between each anode and the belt is filled with a metal (zinc) enriched acidic electrolyte.
  • the current flows from the anodes to the band connected as a cathode, on the surface of which the zinc is deposited.
  • the tape is to be coated on one side only with such an arrangement, further problems are added. If the anode of the strip side not to be coated is completely removed or replaced by a dummy anode (eg a plastic plate), not only edge teasing on the side to be coated, but also edge tedding occurs as a result of encompassing the current flow on the side not to be coated.
  • a dummy anode eg a plastic plate
  • edge masks which, in the form of electrically insulating plates or foils, prevent the flow of current between the two anodes next to the strip.
  • the band edges comprise U-profiles arranged on the end faces of the electrically insulating plates. From the immersion depth of the strip edges in the U-profiles depends on the degree of Kantenaufzinkung. It is therefore necessary to always accurately track the U-Pofile the tape running. This requires a tape edge position measurement and complex edge mask drives with complicated measurement and control technology.
  • edge masks Another disadvantage of the edge masks is their susceptibility. For example, not smooth band edges or sudden width variations of the band can damage the edge masks. Expensive shutdowns and repairs are the result.
  • edge masks require a minimum distance between the anodes to make them sufficiently stable.
  • the edge masks do not solve the problem that the coating thickness across the width of the tape is a direct image of the cross profile of the tape. For example, if the tape has a transverse bow or other unevenness or imbalance between the anodes, this results in an uneven coating thickness. In order to avoid this undesired effect, the prior art coating processes are preceded by expensive draft-leveling equipment.
  • the present invention seeks to provide an arrangement for electro-galvanic metal coating of the type mentioned above, the edge growths of the deposited metal safely prevented while avoiding the disadvantages of the arrangements with edge masks.
  • a uniform metal coating should be ensured regardless of any Bandunplan symposium, a removal of the anode on a non-coated side superfluous and no moving parts in the anode area may be required.
  • this object is achieved in an arrangement of the type mentioned in that insulating materials arranged between the anode strips, the anode strips against each other and insulate that the insulating material protrude at least over the tape facing surface of each anode also in the electrolyte.
  • the arrangement according to the invention makes it possible, depending on the respective width of the strip to be coated, to supply only those anode strips with current which are located opposite the strip.
  • the current band position can be determined with the existing tape position measuring system.
  • unplane tapes can advantageously also be coated by switching off the power supply of individual anode strips, which are closer to the strip surface than provided by the mean value of the distances.
  • the tape is indeed further coated, but to a lesser extent. Weakened, this also applies to the next but one strip. As a result, switching off individual anode strips leads to a homogenization of the coating.
  • the individual anode strips are insulated from one another, for example, by insulating strips which project beyond the surface of the anodes formed by the anode strips in the direction of the electrolyte. The only a few millimeters into the electrolyte protruding insulating strip also prevent striking the tape.
  • the layer thickness can also be controlled by selecting the over or underfilling of the strip edges with the anode strips fed with current, for example dropping, uniformly or rising towards the strip edge.
  • the insulating strips are preferably made of wear-resistant and unbreakable material.
  • Another key advantage of the insulating strip projecting beyond the surface of each anode is that the electrolyte is guided parallel to or against the strip running direction.
  • the uniform flow rate over the bandwidth results in a more uniform deposition of metal than in the known arrangements in which crossflows can occur, especially when the supply and / or removal of the flowing electrolyte into the anode area is not carefully performed.
  • anodes according to the invention are connected one behind the other in the running direction of the strip. Due to the individual control options of the anodes connected in series, the summation of the coating profile, which can be individually controlled with each individual anode, ensures an always uniform layer thickness.
  • the coating profile can be controlled particularly effectively by supplying current to the anode strips with the aid of a current regulator.
  • the current regulator keeps the current level desired in each anode strip constant.
  • Coulombic metal mass is directly proportional to the sum of currents according to Coulomb's law, so that the coating thickness can be precisely controlled (for example, one gram of zinc deposit requires 1.22 Ah).
  • the thickness of the coating can be controlled by having the anode strips of each anode over their length are divided several times and each anode strip part is preferably powered individually via a switch with power. For example, if the anode strip is divided 4-fold, each anode strip can be charged with 0%, 25%, 50%, 75%, and 100% current.
  • FIG. 1 shows an arrangement for the electro-galvanic coating of a strip 2 running in an electrolyte 1.
  • an upper and a lower anode 3 a, 3 b are arranged at a short distance.
  • the width of the upper and lower anode 3a, 3b depends on the widest band to be coated. With a width of the band of, for example, 1850 mm, the anode width may be 2050 mm.
  • edge masks 4 consist of insulating plates 4a, 4b and the band edges 2c, 2d comprehensive U-profiles 4c, 4d.
  • a drive for the edge mask 4, not shown in FIG. 2 guides the U-profiles 4c, 4d exactly to the course of the band edges 2c, 2d. This is associated with a high measurement and control effort.
  • both the arrangement according to FIG. 1 and FIG. 2 have the disadvantage that the coating thickness over the width of the strip is a direct image of the transverse profile of the strip 2.
  • FIG. 3 illustrates this relationship using the example of an arcuate cross-section of the band 2, which is guided between an upper and a lower anode 3a, 3b.
  • the arrangement according to the invention in FIG. 4 consists of individual anode strips 5a, 5b, which are arranged both above and below the band 2 in the exemplary embodiment shown.
  • the individual anode strips 5a, 5b are insulated from one another by insulating strips 6a, 6b which protrude in the direction of the electrolyte 1 over the surface of the anodes formed by the strips 5a, 5b.
  • the anode strips 5a, 5b each form a lower and an upper box-shaped anode, which at the same time form the flow channel for the electrolyte 1 with lateral closures, not shown in FIG.
  • the entire arrangement can be replaced by lateral displacement with little time for repair and / or maintenance.
  • Special coating cells are dispensable in such an embodiment.
  • each individual anode strip 5a, 5b is connected via its own switch 8a, 8b to a central rectifier 7a, 7b which supplies it with current.
  • central rectifiers 7a, 7b it is also possible to assign a separate rectifier to each individual anode strip, which is connected to the anode strip either via a switch or a current regulator.
  • FIG. 5 assumes that four anodes designed according to the invention (FIG. 4) are arranged one behind the other in the direction of strip travel. In the embodiment, only a coating on the surface 2a of the belt 2 takes place. The anode strips 5b of the lower anode are all turned off.
  • FIG. 6 shows a smoothing of the zinc layer in the edge region when passing through only two anodes connected in series with different wiring of the anode strips 5a, 5b in the edge region of the strip 2.

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)
EP98107344A 1997-04-25 1998-04-22 Anordnung zur elektrogalvanischen Metallbeschichtung von Bändern Expired - Lifetime EP0875605B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717489 1997-04-25
DE19717489A DE19717489B4 (de) 1997-04-25 1997-04-25 Anordnung zur elektrogalvanischen Metallbeschichtung eines Bandes

Publications (3)

Publication Number Publication Date
EP0875605A2 EP0875605A2 (de) 1998-11-04
EP0875605A3 EP0875605A3 (de) 1998-12-09
EP0875605B1 true EP0875605B1 (de) 2006-05-31

Family

ID=7827729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107344A Expired - Lifetime EP0875605B1 (de) 1997-04-25 1998-04-22 Anordnung zur elektrogalvanischen Metallbeschichtung von Bändern

Country Status (10)

Country Link
US (1) US6071384A (ko)
EP (1) EP0875605B1 (ko)
JP (1) JPH10310900A (ko)
KR (1) KR100568022B1 (ko)
CN (1) CN1221685C (ko)
AT (1) ATE328137T1 (ko)
BR (1) BR9801440A (ko)
DE (2) DE19717489B4 (ko)
RU (1) RU2205252C2 (ko)
UA (1) UA57003C2 (ko)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7427337B2 (en) * 1998-12-01 2008-09-23 Novellus Systems, Inc. System for electropolishing and electrochemical mechanical polishing
DE10100297A1 (de) * 2001-01-04 2002-07-18 Gesimat Gmbh Vorrichtung und Verahren zur elektrochemischen Beschichtung
KR20030025523A (ko) * 2001-09-21 2003-03-29 지에스티 반도체장비(주) Ｐｃｂ 전해도금장치
DE102009041068A1 (de) * 2009-09-10 2011-03-24 GM Global Technology Operations, Inc., Detroit Vorrichtung sowie Verfahren zur galvanischen Abscheidung einer Schicht auf einen Gegenstand
KR20150057194A (ko) 2013-11-18 2015-05-28 삼성전기주식회사 도금 장치
KR20150062008A (ko) 2013-11-28 2015-06-05 삼성전기주식회사 도금 장치
KR102194716B1 (ko) 2014-03-06 2020-12-23 삼성전기주식회사 도금 장치
KR101666461B1 (ko) * 2014-12-24 2016-10-14 주식회사 포스코 에지 영역 과도금 방지를 위한 전기 도금 장치
EP3064617B1 (de) * 2015-03-03 2018-08-15 MTV Metallveredlung GmbH & Co. KG VERFAHREN ZUR VERNICKELUNG GROßFLÄCHIGER BAUTEILE
CN109487328A (zh) * 2019-01-15 2019-03-19 山东宏旺实业有限公司 一种酸洗电解槽
KR102022920B1 (ko) * 2019-06-25 2019-09-19 주식회사 태성 롤투롤 수평식 연속 도금장치
KR102597468B1 (ko) * 2019-11-14 2023-11-01 에스케이넥실리스 주식회사 전해동박 도금장치 및 이를 포함하는 전해동박 제조장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4824925B1 (ko) * 1968-07-08 1973-07-25
JPS5218649A (en) * 1975-08-04 1977-02-12 Taku Sasagawa Free stand for twoowheel vehicle on ground
DE3017079A1 (de) * 1980-05-03 1981-11-05 Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg Vorrichtung zum elektroplattieren
US4401523A (en) * 1980-12-18 1983-08-30 Republic Steel Corporation Apparatus and method for plating metallic strip
AU530006B2 (en) * 1981-02-24 1983-06-30 Nippon Kokan Kabushiki Kaisha Method and apparatus for electroplating steel strip
LU86520A1 (fr) * 1986-07-17 1988-02-02 Delloye Matthieu Procede d'electrozingage en continu d'une tole d'acier par voie electrolytique
DE3901807A1 (de) * 1989-01-21 1990-07-26 Roland Schnettler Vorrichtung zum elektrolytischen abscheiden von metallen auf einer oder beiden seiten von baendern
EP0491163B1 (en) * 1990-12-19 1996-02-14 Nikko Gould Foil Co., Ltd. Method and apparatus for producing electrolytic copper foil
FR2725215B1 (fr) * 1994-09-29 1996-11-22 Lorraine Laminage Cellule d'electrodeposition en continu d'alliages metalliques

Also Published As

Publication number Publication date
KR19980081740A (ko) 1998-11-25
KR100568022B1 (ko) 2006-05-25
CN1206753A (zh) 1999-02-03
US6071384A (en) 2000-06-06
DE59813567D1 (de) 2006-07-06
CN1221685C (zh) 2005-10-05
DE19717489B4 (de) 2008-04-10
UA57003C2 (uk) 2003-06-16
EP0875605A3 (de) 1998-12-09
EP0875605A2 (de) 1998-11-04
DE19717489A1 (de) 1998-10-29
JPH10310900A (ja) 1998-11-24
RU2205252C2 (ru) 2003-05-27
ATE328137T1 (de) 2006-06-15
BR9801440A (pt) 1999-09-28

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