WO2005064043A2 - Galvanoplastie perfectionnee sur bandes metalliques - Google Patents

Galvanoplastie perfectionnee sur bandes metalliques Download PDF

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Publication number
WO2005064043A2
WO2005064043A2 PCT/EP2004/014894 EP2004014894W WO2005064043A2 WO 2005064043 A2 WO2005064043 A2 WO 2005064043A2 EP 2004014894 W EP2004014894 W EP 2004014894W WO 2005064043 A2 WO2005064043 A2 WO 2005064043A2
Authority
WO
WIPO (PCT)
Prior art keywords
anode
strip
tin
anodes
pellets
Prior art date
Application number
PCT/EP2004/014894
Other languages
English (en)
Other versions
WO2005064043A3 (fr
Inventor
Kokkie Schnetz
Daniël Adriaan DE VREUGD
Eric Bob Wijnbeek
Jacques Hubert Olga Joseph Wijenberg
Original Assignee
Corus Staal Bv
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 Corus Staal Bv filed Critical Corus Staal Bv
Priority to AU2004309087A priority Critical patent/AU2004309087B2/en
Priority to BRPI0418111-5A priority patent/BRPI0418111A/pt
Priority to DE602004021961T priority patent/DE602004021961D1/de
Priority to US10/584,068 priority patent/US20070227632A1/en
Priority to MXPA06007170A priority patent/MXPA06007170A/es
Priority to JP2006546130A priority patent/JP2007515557A/ja
Priority to EP04804475A priority patent/EP1699949B1/fr
Priority to CA002551273A priority patent/CA2551273A1/fr
Priority to AT04804475T priority patent/ATE435933T1/de
Publication of WO2005064043A2 publication Critical patent/WO2005064043A2/fr
Publication of WO2005064043A3 publication Critical patent/WO2005064043A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10—Electrodes, e.g. composition, counter electrode
    • 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
    • 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

Definitions

  • the invention relates to a process for high-speed metal strip electrotinning wherein the strip is plated by anodically dissolving tin anodes facing the strip into an electroplating solution.
  • a process for high-speed metal strip electrotinning wherein the strip is plated by anodically dissolving tin anodes facing the strip into an electroplating solution.
  • Such a process is known from practice and is described in detail e.g. in the handbook "The Making, Shaping and Treating of Steel", 10th ed., pp. 1146-1153, where a description of a typical commercial tinplating process called FERROSTAN is given which description is considered to be incorporated herein by reference.
  • FERROSTAN a typical commercial tinplating process
  • the anode bars are to be replaced and the anode bar positions adjusted regularly, which is labour intensive because of the weight of the anode bars of typically 50 kg, potentially hazardous in view of fumes, strong acids and high electrical currents and deteriorates the uniform tin coating thickness over the strip width.
  • the anode bars are spent to an agreed minimum thickness, they are removed from the plating section and recycled in a remelting process for new cast anodes. Since optimal placement of the anodes is important for stable and uniform plating, the anode positions must be adjusted regularly. It is an objective to minimize relatively unhealthy, heavy and uncomfortable work on parts of and above or near plating units used in electrolytic tinplating processes.
  • masking out is held to mean positioning an object between anode and cathode so as to impede plating "in the shadow of the object" if the anode is seen as a light source.
  • anode substance viz. tin is supplied in pellet form and fed to baskets
  • tin bars as described above are no longer used and so there is no need to adjust them anymore.
  • the need to supply heavy anode bars is eliminated.
  • anode substance is supplied in the form of easily handled anode pellets.
  • the invention also avoids removal of spent anode material since the pellets may be completely consumed.
  • pellets shall mean rounds, ovoids, briquets, granules and the like.
  • part of the anode is masked out according to claim 2.
  • the masking means have the features of claim 3.
  • the pellets are electrically contacted via a current collector made of a material with a low electrical resistance allowing for good electrical contact with the tin pellets and being electrochemically inert in the electrolyte.
  • Suitable materials for the current collector include Ti and Zr.
  • an automated supply system is provided to add tin pellets to the anode basket.
  • Fig. 1 shows a cross section of a conventional tinning cell and various elements used in such a cell
  • Fig. 2 shows an example of a screen shot of process control apparatus displaying coating thicknesses at different positions over the strip width in a conventional tinning line
  • Fig. 3 shows a top view of an anode bridge forming part of a conventional tinning cell
  • Fig. 1 shows a cross section of a conventional tinning cell and various elements used in such a cell
  • Fig. 2 shows an example of a screen shot of process control apparatus displaying coating thicknesses at different positions over the strip width in a conventional tinning line
  • Fig. 3 shows a top view of an anode bridge forming part of a conventional tinning cell
  • FIG. 4 schematically indicates the movement of the anode bars along the anode bridge in a conventional tinning process
  • Fig. 5 schematically indicates removing or adding anode bars in a conventional tinning process
  • Fig. 6 schematically indicates placement and appearance of an anode basket for use in the process according to the invention
  • Fig. 7 schematically indicates an anode basket for use in the process according to the invention in more detail
  • Fig. 8 a graph generally indicating i/i aVg as a function of D ES
  • Fig. 9 schematically indicates a shutter placed as a mask in front of an anode basket for use in a process according to the invention.
  • tin is supplied by tin anode 1 which has an anode gap 2 and an anode notch 3.
  • tin anode 1 which has an anode gap 2 and an anode notch 3.
  • Isolated plate 6 separates two tinning sections in one plating cell. Electrical power is supplied to the strip via conductor roll 7. Near the bottom of the plating cell the strip is guided by sink roll 8. Also hold-down roll 9 is shown.
  • Anode bridge 4 comprises an insulated parking space 10 for a fresh tin anode 1.
  • the tin anodes 1 are connected to the anode bridge 4 via contact strip 14.
  • Three different procedures can be distinguished during operation of the soluble anode system.
  • Procedure 1 - Anode spacing During tinplating the anodes have to be properly positioned to obtain a uniform tin coating thickness over the strip width.
  • Fig. 2 an example is given of values of the tin coating thickness over the strip width in a situation in which the anodes were not properly positioned. To prevent the situation described above, the anodes have to be positioned as can be seen in Fig. 3, which gives a top view of anode bridge.
  • the optimal anode positions are given by parameters A-G.
  • the optimal parameters are given for a line speed of 400 m min "1 , a strip width of 732 mm and a tin coating thickness of 2.8 g m "2 on each side of the strip.
  • anode spacing is a regularly recurring operation after replacement of spent anodes (see procedure 2), after a change of strip width, and after a change to differential coating (see procedure 3). Anodes are manually spaced by placing an insulated hook into the anode gap.
  • a first disadvantage is the occurrence of variations of tin coating thickness over the strip width, e.g.
  • the outer anodes may be positioned too close to the strip edge (parameter C), or the anodes may be a non-equidistanced (parameter D), or not evenly consumed over the length of the strip caused by improper anode positioning.
  • a second disadvantage is the labour intensiveness of adjustment, and a third disadvantage is that adjustment is hazardous in view of exposure to electrolyte, fumes and the presence of electrically charged installation parts.
  • Procedure 2 Replacing spent anodes
  • the thickness of the worn anodes is regularly checked with a thickness gauge.
  • the anode thickness in the optimal anode arrangement previously described becomes less than 15 mm
  • the anode is detached from the anode bridge and placed on the nearest insulated parking space, see Fig. 4 where the arrows indicate how the anodes "move" along the anode bridge.
  • a new anode is placed on the insulated parking space and transferred to the anode bridge.
  • anodes need to be repositioned again (see procedure 1).
  • a fresh tin anode is designated with N and a worn one with W.
  • the anodes dissolve which results in a changing anode to strip distance. This causes a non-homogeneous tin coating thickness distribution over the strip width. In practice this is compensated by placing the anode bridge and the strip at a small angle (see procedure 1, parameters A and B).
  • the disadvantages of the soluble anode system due to anode replacement are mainly related to anode spacing (see procedure 1).
  • An additional disadvantage is that the anodes are not constantly positioned according to the optimal anode arrangement during anode replacement. This causes variations in the tin coating thickness over the strip width.
  • Procedure 3 Changing to another strip width or to differential coating
  • parameter C in Fig. 3 no longer has the optimal value.
  • tin edge build-up becomes more severe on the low coating weight side.
  • both situations are compensated by removing (or adding) and/or repositioning the anodes on the anode bridge.
  • Fig. 5 indicating removing or adding anodes after changing to another strip width or to differential coatings. If the strip width changes e.g. from 732 mm to 580 mm in the previously described optimal anode arrangement (see procedure 1) two anodes have to be detached from the anode bridge (see Fig. 5).
  • the remaining anodes need to be repositioned again (see procedure 1).
  • a differential coating is applied of 2.8 / 5.6 g m "2 in the previously described optimal anode arrangement (see procedure 1) one anode has to be added on the anode bridge facing the high coating weight side of the strip.
  • the anodes need to be repositioned again (see procedure 1).
  • the outermost anodes also have to be shifted more inwards (parameter C in Fig. 3) with respect to the strip edge.
  • DISADVANTAGES PRIOR ART AND ADVANTAGES INVENTION The disadvantages of the soluble anode system due to changing to another strip width or to differential coating are mainly related to anode spacing (see procedure 1).
  • An additional disadvantage is that the anodes are not positioned according to the optimal anode arrangement (see procedure 1) during removal or adding of anodes. This causes variations in the tin coating thickness over the strip width.
  • dimension stable anodes DSA
  • This system is less labour intensive and results in less variations of tin coating thickness over the strip width.
  • the main disadvantage of DSA is that an external dissolution reactor is required to replenish tin to the electrolyte.
  • the advantages of an SA and a DSA system are now combined into a system, which is totally new for high-speed strip electrotinning, the new system hereinafter referred to as a DSSA (dimension stable soluble anode) system.
  • a DSSA dimension stable soluble anode
  • the tin stock can be lower and compared to the DSA system no separate dissolution reactor is needed. Also less personnel is needed for anode handling.
  • the cell voltage can be lowered. Probably this is due to the increase of anodic surface. It will be clear that this also opens up routes to increased production speeds and thus potentially higher yield for the electrotinning production line in question.
  • the invention will now be described in more detail by describing an example according to the invention.
  • anode baskets 12 were mounted on the anode bar 4 via contact strip 14.
  • the contact strips 14, made of copper in the experiments according to this example, may be coated on their surface contacting the anode basket 12 with a noble metal like Au or Pt.
  • the contact strips 14 were coated with Pt, which worked well.
  • the anode baskets 12 in Fig. 6 were filled with tin pellets (2-20 mm preferably between 5-9 mm in diameter).
  • tin pellets are supplied regularly, which can be done while the plating line is fully operational.
  • the anode baskets 12 in the experiments according to this example made of titanium, are designed and positioned in such a way that the anode is closer to the strip at the bottom to compensate for holmic losses in the anode and strip, which would otherwise cause unwanted differences in current density over the height of the strip.
  • the anode basket was covered with an anode bag to prevent small tin fines entering the electrolyte. Under normal operating conditions the anode bags may need replacement 1-2 times a year.
  • a normalised current density defined as i aV g, wherein i stands for the local current density and i avg for the average current density (e.g. in A/m ), and therefore the amount of tin build-up at the edge of the strip reaches an unacceptable level, see upper curve in Fig. 8.
  • i stands for the local current density
  • i avg for the average current density (e.g. in A/m )
  • the horizontal axis shows D ES representing the distance in mm from the edge of the strip
  • the lower curve shows the relation i/i avg versus D ES for a strip and anode width of 1020 mm
  • the upper curve shows i/i avg after the strip width has changed to 940 leaving the anode configuration configured for a strip width of 1020 mm.
  • the horizontal axis (the X-axis) represents the distance from the centre of the strip, D CS.
  • the upper curve corresponds to an overlap of 0 mm
  • the next lower curve to 30 mm the next lower curve to 45 mm and the lower curve to 60 mm.
  • an optimum tin layer thickness distribution may be found at an overlap of mask and anode of about 45 mm. It will be clear that the invention involves a great leap forward whereby the features and operation of existing electrotinning lines can be greatly improved by providing a method that can be easily controlled, is less labour intensive, eliminates risks and reduces waste (regeneration) flows.

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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)
  • Electroplating Methods And Accessories (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

L'invention concerne un procédé d'étamage électrolytique sur bandes métalliques à grande vitesse, selon lequel la bande est plaquée par dissolution anodique d'anodes en étain faisant face à la bande dans une solution de galvanoplastie, et par dépôt de l'étain dissous anodiquement sur au moins une partie de la bande faisant office de cathode. L'étain est ajouté à la solution de galvanoplastie sous forme de granulés conservés dans un panier d'anode.
PCT/EP2004/014894 2003-12-23 2004-12-23 Galvanoplastie perfectionnee sur bandes metalliques WO2005064043A2 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
AU2004309087A AU2004309087B2 (en) 2003-12-23 2004-12-23 Improved metal strip electroplating
BRPI0418111-5A BRPI0418111A (pt) 2003-12-23 2004-12-23 eletrogalvanização de tira de metal aperfeiçoada
DE602004021961T DE602004021961D1 (de) 2003-12-23 2004-12-23 Verbesserte metallbandgalvanisierung
US10/584,068 US20070227632A1 (en) 2003-12-23 2004-12-23 Metal Strip Electroplating
MXPA06007170A MXPA06007170A (es) 2003-12-23 2004-12-23 Electroplaqueado de cinta metalica mejorado.
JP2006546130A JP2007515557A (ja) 2003-12-23 2004-12-23 改良された金属細片電気メッキ
EP04804475A EP1699949B1 (fr) 2003-12-23 2004-12-23 Galvanoplastie perfectionnee sur bandes metalliques
CA002551273A CA2551273A1 (fr) 2003-12-23 2004-12-23 Galvanoplastie perfectionnee sur bandes metalliques
AT04804475T ATE435933T1 (de) 2003-12-23 2004-12-23 Verbesserte metallbandgalvanisierung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03078988.7 2003-12-23
EP03078988 2003-12-23

Publications (2)

Publication Number Publication Date
WO2005064043A2 true WO2005064043A2 (fr) 2005-07-14
WO2005064043A3 WO2005064043A3 (fr) 2005-09-09

Family

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PCT/EP2004/014894 WO2005064043A2 (fr) 2003-12-23 2004-12-23 Galvanoplastie perfectionnee sur bandes metalliques

Country Status (15)

Country Link
US (1) US20070227632A1 (fr)
EP (1) EP1699949B1 (fr)
JP (1) JP2007515557A (fr)
KR (1) KR20060127076A (fr)
CN (1) CN1918328A (fr)
AT (1) ATE435933T1 (fr)
AU (1) AU2004309087B2 (fr)
BR (1) BRPI0418111A (fr)
CA (1) CA2551273A1 (fr)
DE (1) DE602004021961D1 (fr)
ES (1) ES2327239T3 (fr)
MX (1) MXPA06007170A (fr)
PT (1) PT1699949E (fr)
RU (1) RU2374363C2 (fr)
WO (1) WO2005064043A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2918674A1 (fr) * 2007-07-12 2009-01-16 Siemens Vai Metals Tech Sas Installation et procede pour l'etamage electrolytique de bandes d'acier mettant en oeuvre une anode soluble
WO2015011130A1 (fr) * 2013-07-26 2015-01-29 Tata Steel Ijmuiden B.V. Système d'anode destiné à être utilisé dans une cellule de dépôt électrolytique pour le revêtement d'une bande métallique mobile et procédé mettant en œuvre ledit système d'anode
US11098412B2 (en) 2018-03-16 2021-08-24 Airbus Defence and Space GmbH Apparatus and method for the continuous metallization of an object

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JP4902346B2 (ja) * 2006-12-28 2012-03-21 Ｊｆｅスチール株式会社 Ｓｎメッキ用電極支持体及びその使用方法
JP5884169B2 (ja) * 2012-03-01 2016-03-15 Ｊｆｅスチール株式会社 電気めっき鋼板の製造ラインの自溶性電極の消費量自動監視システム及び方法
JP5900213B2 (ja) * 2012-07-18 2016-04-06 Ｊｆｅスチール株式会社 電気めっき鋼板の製造装置
JP6084112B2 (ja) * 2013-05-09 2017-02-22 株式会社荏原製作所 Ｓｎ合金めっき装置およびＳｎ合金めっき方法
JP6233334B2 (ja) 2015-03-04 2017-11-22 Ｊｆｅスチール株式会社 方向性電磁鋼帯の連続電解エッチング方法および方向性電磁鋼帯の連続電解エッチング装置
CN105696059B (zh) * 2016-02-02 2018-03-06 上海大学 磁场下高强高导铜‑纳米碳管复合材料的制备方法及装置
CN107740173B (zh) * 2017-09-15 2020-12-15 首钢京唐钢铁联合有限责任公司 一种高锡量镀锡板的边部质量控制方法
EP3763850A1 (fr) 2019-07-10 2021-01-13 Tata Steel IJmuiden B.V. Anode et procédé de dépôt électrolytique d'une couche métallique sur un substrat métallique
CN214612819U (zh) 2021-03-25 2021-11-05 宁德时代新能源科技股份有限公司 一种过滤机构及用于生产导电材料的设备
CN116516445A (zh) * 2022-11-28 2023-08-01 粤海中粤(中山)马口铁工业有限公司 可溶性阳极的边部屏蔽装置及方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2918674A1 (fr) * 2007-07-12 2009-01-16 Siemens Vai Metals Tech Sas Installation et procede pour l'etamage electrolytique de bandes d'acier mettant en oeuvre une anode soluble
WO2009016292A2 (fr) * 2007-07-12 2009-02-05 Siemens Val Metals Technologies Sas Installation et procede pour l'etamage electrolytique de bandes d'acier mettant en oeuvre une anode soluble
WO2009016292A3 (fr) * 2007-07-12 2009-09-11 Siemens Val Metals Technologies Sas Installation et procede pour l'etamage electrolytique de bandes d'acier mettant en oeuvre une anode soluble
WO2015011130A1 (fr) * 2013-07-26 2015-01-29 Tata Steel Ijmuiden B.V. Système d'anode destiné à être utilisé dans une cellule de dépôt électrolytique pour le revêtement d'une bande métallique mobile et procédé mettant en œuvre ledit système d'anode
US11098412B2 (en) 2018-03-16 2021-08-24 Airbus Defence and Space GmbH Apparatus and method for the continuous metallization of an object

Also Published As

Publication number Publication date
KR20060127076A (ko) 2006-12-11
AU2004309087A1 (en) 2005-07-14
WO2005064043A3 (fr) 2005-09-09
ATE435933T1 (de) 2009-07-15
DE602004021961D1 (de) 2009-08-20
MXPA06007170A (es) 2006-09-04
RU2374363C2 (ru) 2009-11-27
CA2551273A1 (fr) 2005-07-14
RU2006126703A (ru) 2008-01-27
CN1918328A (zh) 2007-02-21
ES2327239T3 (es) 2009-10-27
BRPI0418111A (pt) 2007-04-17
JP2007515557A (ja) 2007-06-14
EP1699949A2 (fr) 2006-09-13
PT1699949E (pt) 2009-08-03
EP1699949B1 (fr) 2009-07-08
US20070227632A1 (en) 2007-10-04
AU2004309087B2 (en) 2009-10-22

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