EP0142010B1 - Procédé et appareil pour le dépôt électrolytique de métaux - Google Patents

Procédé et appareil pour le dépôt électrolytique de métaux Download PDF

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Publication number
EP0142010B1
EP0142010B1 EP84111959A EP84111959A EP0142010B1 EP 0142010 B1 EP0142010 B1 EP 0142010B1 EP 84111959 A EP84111959 A EP 84111959A EP 84111959 A EP84111959 A EP 84111959A EP 0142010 B1 EP0142010 B1 EP 0142010B1
Authority
EP
European Patent Office
Prior art keywords
electrolyte
strip
metal strip
entry
anodes
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
Application number
EP84111959A
Other languages
German (de)
English (en)
Other versions
EP0142010A1 (fr
Inventor
Werner Dipl.-Ing. Bechem
Hubertus Dipl.-Ing. Peters
Werner Solbach
Dietrich Dr. Ing. Wolfhard
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.)
Hoesch AG
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Hoesch AG
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Filing date
Publication date
Application filed by Hoesch AG filed Critical Hoesch AG
Priority to AT84111959T priority Critical patent/ATE31560T1/de
Publication of EP0142010A1 publication Critical patent/EP0142010A1/fr
Application granted granted Critical
Publication of EP0142010B1 publication Critical patent/EP0142010B1/fr
Expired legal-status Critical Current

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    • 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
    • C25D7/0628—In vertical cells

Definitions

  • the invention relates to a method for the electrolytic deposition of metals, in particular zinc, from aqueous solutions of the metal salts on metal strip, in particular steel strip, using high relative flow velocities between the electrolyte and the metal strip and the anodes, the metal strip being introduced vertically into the electrolyte, deflected and is led vertically out of the electrolyte and a device for carrying out this method, in which a deflection roller and / or a current transfer roller are assigned to the metal strip inlet and outlet above an electrolytic cell, the metal strip in the lower part of the electrolytic cell around an immersion roller and in the inlet area and outlet area is guided between anodes which, together with the container walls, form shaft-shaped areas for the tape inlet and the tape outlet, the anode surfaces facing the metal tape being parallel to one another within the inlet and outlet areas Change and are arranged to the metal band.
  • a deflection roller and / or a current transfer roller are assigned to the metal strip inlet and outlet above an electro
  • Methods for the electrolytic deposition of metals on metal strip are known in various embodiments with horizontal, radial or vertical strip guidance in the refining zone.
  • pairs of electrode cushions are arranged even when the steel strip is guided vertically in the electrolysis area between current-conducting rollers serving to guide the steel strip, each electrode cushion being provided with at least one slot through which the electrolyte is pushed out to the surface of the metal strip so that a sufficiently high static pressure of the pressed out electrolyte forms to keep the metal strip at a distance from the anode pads.
  • the slot through which the electrolyte is pressed out of the respective electrode pad preferably has a closed, approximately rectangular shape in the middle of the anode surface.
  • the electrolyte In order to build up the static pressure between the anode pad and the steel strip, the electrolyte must be pressed out of the slot of the anode pad with a speed component directed against the strip surface, whereby a different velocity distribution of the electrolyte on the strip than at farther occurs where the electrolyte stream emerging from the anode pad hits distant locations on the surface of the steel strip opposite the anode pads.
  • the space between the anode cushion and the steel strip is filled solely by the amount of electrolyte flowing out of the cushion and the electrolyte flows freely on all sides, where it collects below the current-carrying deflection rollers in the lower part of the cell when the strip is guided vertically in the electrolysis area.
  • the current density can only be adapted to the different relative flow velocities in the inlet and outlet part of the electrolysis cell according to the running and running run of the metal strip with increased effort; as a result, it is difficult, if not impossible, to achieve uniform deposition conditions in these two parts of the electrolytic cell.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, which also in the case of a vertical cell, vertically on the metal strip, in particular steel strip, which is guided by an electrolyte, the use of high current densities enables the same relative flows between the metal strip and the electrolyte and thus at the same time even separation conditions for the incoming and outgoing metal strip.
  • the electrolyte in the entire area between the anodes and the metal strip is forcibly guided in the direction of strip travel.
  • This is preferably achieved in that the flow of the electrolyte is increased by increasing the pressure, the pressure in the inlet and / or outlet part advantageously being increased.
  • a further possibility of carrying out the invention is given in that the electrolyte is supplied in the area of the tape outlet with a downward speed component, that the electrolyte is pumped against the tape running direction and also in that a vacuum is generated locally in the cell.
  • the device according to the invention which is preferred for carrying out the method according to the invention is constructed in such a way that the inlet and outlet areas are formed as two separate shafts delimited by container walls and are communicatively connected to one another by a lower part, and the upper edge of the inlet area by an amount A h below the upper edge the outlet area is arranged. Further preferred embodiments of the device according to the invention result from the following description and the further claims.
  • Soluble anodes can also be used in a device according to the invention, the build-up of a static pressure to support the steel strip is not required and a similar and uniform electrolyte flow (relative flow) against the strip running direction is generated in both the inlet and the outlet part, the pumped amounts of electrolyte and thus the flow rate in the space between the anode and cathode are freely selectable within wide limits. Accordingly, a perfect surface of the deposited metal layer is ultimately achieved faster and with simpler means than in the prior art.
  • the process is carried out with a relative flow rate between more than 0.5 to 2.5, preferably 3.0 m / sec. performed, the relative flow rate representing the difference in speed between the metal strip and the electrolyte flow rate.
  • FIGS. 1 to 5 showing in schematic form electrolytic cells in different variants with an incoming and outgoing metal strip.
  • a deflection roller 2, 3 and a respective current transfer roller 4, 5 are provided above an electrolysis cell, generally designated 1, in each case above the metal strip outlet and metal strip inlet into or out of the electrolysis cell 1.
  • the to be refined, e.g. B. to be galvanized metal strip 6 runs according to the direction of the arrows 7 between the guide roller 2 and the current transfer roller 4, through which the current transfer to the metal strip 6, z. B. a steel strip, touching the line, down into the inlet area 8 between the anodes 9, around the immersion roller 10 and then upwards between the anodes 11 in the outlet area 12.
  • the metal strip 6 After emerging from the outlet area 12 of the electrolytic cell 1, the metal strip 6 becomes between the deflection roller 3 and current transfer roller 5 z. B. the next electrolytic cell. Either soluble or insoluble anodes are used as anodes 9, 11. Alternatively, 2 and 3 current rollers can be used instead of the deflection rollers, whereby the current transfer rollers 4 and 5 can be omitted.
  • both the inlet area 8 and the outlet area 12 are formed in a shaft-like manner, these areas being communicatively connected to one another by a lower part 13 in which the plunger roller 10 is arranged. Furthermore, the upper edge of the inlet area 8 is arranged by the dimension A h below the upper edge of the outlet area 12. If the electrolyte liquid in the outlet area 12, for. B. entered via an inlet funnel 14 shown in FIG. 3, this results in a flow of the electrolyte counter to the direction of belt travel during the passage of the metal strip 6 through the electrolytic cell 1, ie the flow is directed downwards in the outlet region 12 and upwards in the inlet region 8 .
  • the electrolyte emerges at the upper edge of the inlet area 8, as indicated by arrows 18.
  • the value for the dimension A h results from the desired flow rate and the flow losses for the electrolyte in the outlet area 12, in the lower part 13 and in the inlet area 8.
  • the effective length for the coating or finishing of the metal strip 6 of the anodes 9, 11 is indicated in FIG. 11 with a.
  • the anodes 9 are shortened by the value A h, so that the lower edge of the anodes 9 in the inlet area 8 is at the same height as that of the anodes 11 in the outlet area 12.
  • inlet funnels 14 are provided for the electrolyte in the outlet area 12 of the metal strip 6; If the electrolyte is introduced into these inlet funnels 14, which extend between the anodes 11, there is an increased flow rate of the electrolyte between the metal strip 6 and the anodes 11 in the discharge region 12 against the direction of travel of the metal strip 6.
  • suction pipes 15 with a pump 16 are provided below the anodes 11, by means of which electrolyte is sucked off and into the inlet area 8 below the anodes 9 is pushed in through food pipes 17.
  • an additional upward flow component is formed in the inlet area 8 in order to almost compensate for flow losses.
  • the overflowing electrolyte is indicated by the arrows 18.
  • the area between the inlet and outlet areas 8, 12 of the electrolytic cell 1 is designed as an overflow container 19 in which a pump 20 is arranged.
  • the electrolyte running from the inlet area 8 into the overflow tank 19 - indicated by the arrow 21 - is pumped back into the opening of the outlet area 12 of the metal strip 6 by means of the pump 20 - as indicated by the arrow 22. Accordingly, only a small amount of electrolyte coming from a storage container (not shown) has to be additionally pumped into the outlet area 12 in order to generate or increase the necessary flow in the opposite direction to the belt running direction.
  • FIG. 5 A further embodiment according to the invention is shown in FIG. 5.
  • a storage container 24 with a connecting pipe 25 to the inlet funnels 14 is arranged above the electrolysis cell 1.
  • the necessary flow energy is achieved in that a directed electrolyte flow is led from the reservoir 24 into the inlet funnel 14 of the outlet region 12.
  • a pump 27 which is arranged in the lower part 13 of the electrolytic cell 1 below the immersion roller 10, a pressure drop is achieved below the outlet area 12 and an increase in pressure below the inlet area 8, so that the height difference between the upper edges of the inlet and outlet areas 8, 12 can be kept very small.

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)
  • Electrolytic Production Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (12)

1. Procédé de précipitation électrolytique de métaux, en particulier du zinc, à partir de solutions aqueuses de sels métalliques sur un feuillard métallique, en particulier un feuillard d'acier, en utilisant de hautes vitesses relatives d'écoulement entre l'électrolyte et le feuillard métallique, ainsi que les anodes, le feuillard métallique étant introduit verticalement dans l'électrolyte, pour être ensuite dévié et sortir verticalement hors de l'électrolyte, caractérisé en ce que, dans toute la zone comprise entre les anodes et le feuillard métallique, l'électrolyte est forcé dans un sens opposé au sens de défilement du feuillard.
2. Procédé selon la revendication 1, caractérisé en ce l'écoulement de l'électrolyte est assuré par une élévation de pression.
3. Procédé selon les revendications 1 et 2, caractérisé en ce que l'on élève la pression à l'extrémité inférieure de la partie d'entrée et/ou dans la partie de sortie.
4. Procédé selon les revendications 1 à 3, caractérisé en ce que, dans la zone de sortie du feuillard, l'électrolyte est acheminé avec une composante de vitesse dirigée vers le bas.
5. Procédé selon les revendications 1 à 4, caractérisé en ce que l'électrolyte est pompé à l'encontre du sens de défilement du feuillard.
6. Procédé selon les revendications 1 à 5, caractérisé en ce que la vitesse d'écoulement de l'électrolyte est accrue du fait que l'on crée localement une dépression dans la cellule.
7. Dispositif pour la réalisation du procédé de précipitation électrolyte de métaux sur un feuillard métallique selon les revendications 1 à 6, dispositif dans lequel, au-dessus d'une cellule électrolytique (1), on prévoit chaque fois un rouleau de renvoi (2,3) et/ou un rouleau de transmission de courant (4, 5) associés à l'entrée et à la ' sortie du feuillard métallique, tandis que le feuillard métallique (6) passe autour d'un rouleau plongeur (10) dans la partie inférieure de la cellule électrolytique (1), et entre des anodes (9, 11) dans la zone d'entrée (8) et dans la zone de sortie (12), qui forment avec les parois du récipient une zone en puits pour l'entrée et la sortie du feuillard, tandis que les surfaces anodiques tournées vers le feuillard 6 sont disposées parallèlement l'une à l'autre et au feuillard métallique (6), dans les zones d'entrée et de sortie (8, 12), caractérisé en ce que les zones d'entrée et de sortie (8, 12) sont réalisées sous la forme de deux puits séparés, limités par des parois du récipient, et communiquent l'une avec l'autre par une partie inférieure (13), tandis que le bord supérieur de la zone d'entrée (8) est disposé a une cote A h en dessous du bord supérieur de la zone de sortie (12).
8. Dispositif selon la revendication 7, caractérisé en ce que, entre les zones d'entrée et de sortie (8, 12), est disposé un récipient de trop-plein (19) et, au moyen d'une pompe (16), l'électrolyte peut être aspiré au moyen de tubes d'aspiration (15) prévus en dessous de la zone de sortie (12), et l'électrolyte peut être acheminé au moyen de tubes d'alimentation (17) prévus en dessous de la zone d'entrée (8), avec une composante de vitesse dirigée vers le haut dans le puits, la cote A h pouvant ainsi être réduite jusqu'à la valeur zéro.
9. Dispositif selon les revendications 7 et 8, caractérisé en ce qu'une pompe (20), prévue dans le récipient de trop-plein (19), est reliée par son côté de refoulement, par des tubes (22), à l'ouverture de la zone de sortie (12).
10. Dispositif selon les revendications 7 à 9, caractérisé en ce qu'une pompe 27 est prévue dans la partie inférieure (13), en dessous du rouleau plongeur (10).
11. Dispositif selon les revendications 7 à 10, caractérisé en ce que, dans la zone de sortie (12), on prévoit, pour le liquide électrolytique, des entonnoirs d'entrée (14) dont l'extrémité inférieure est située entre les anodes (11).
12. Dispositif selon la revendication 11, caractérisé en ce que des réservoirs (24) sont disposés au-dessus des entonnoirs d'entrée (14) avec lesquels ils sont reliés par des tubes (25).
EP84111959A 1983-11-10 1984-10-05 Procédé et appareil pour le dépôt électrolytique de métaux Expired EP0142010B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111959T ATE31560T1 (de) 1983-11-10 1984-10-05 Verfahren und vorrichtung zum elektrolytischen abscheiden von metallen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3340732 1983-11-10
DE3340732 1983-11-10

Publications (2)

Publication Number Publication Date
EP0142010A1 EP0142010A1 (fr) 1985-05-22
EP0142010B1 true EP0142010B1 (fr) 1987-12-23

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EP84111959A Expired EP0142010B1 (fr) 1983-11-10 1984-10-05 Procédé et appareil pour le dépôt électrolytique de métaux

Country Status (11)

Country Link
US (1) US4634504A (fr)
EP (1) EP0142010B1 (fr)
JP (1) JPS60114593A (fr)
KR (1) KR920000247B1 (fr)
AT (1) ATE31560T1 (fr)
AU (1) AU3529684A (fr)
CA (1) CA1251415A (fr)
DE (1) DE3468239D1 (fr)
DK (1) DK529384A (fr)
ES (1) ES8601338A1 (fr)
NO (1) NO844498L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442388A1 (de) * 1994-11-29 1996-05-30 Heraeus Elektrochemie Elektrode mit plattenförmigem Elektrodenträger

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6137996A (ja) * 1984-07-31 1986-02-22 Nippon Kokan Kk <Nkk> 垂直型電気亜鉛めつき装置
DE3510592A1 (de) * 1985-03-23 1986-10-02 Hoesch Stahl AG, 4600 Dortmund Hochgeschwindigkeits-elektrolysezelle fuer die veredelung von bandfoermigem gut
US6395163B1 (en) 1992-08-01 2002-05-28 Atotech Deutschland Gmbh Process for the electrolytic processing especially of flat items and arrangement for implementing the process
US6096183A (en) * 1997-12-05 2000-08-01 Ak Steel Corporation Method of reducing defects caused by conductor roll surface anomalies using high volume bottom sprays
FR2847761B1 (fr) * 2002-11-27 2005-02-04 Framatome Connectors Int Dispositif de metallisation de formes imprimees munies de pistes conductrices d'electricite et procede de metallisation associe
US9878044B2 (en) 2012-03-16 2018-01-30 Merck Patent Gmbh Targeting aminoacid lipids

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US2317242A (en) * 1939-04-28 1943-04-20 Carnegie Illinois Steel Corp Plating tank for electrodeposition of metals on metallic strip
US2673836A (en) * 1950-11-22 1954-03-30 United States Steel Corp Continuous electrolytic pickling and tin plating of steel strip
US3975242A (en) * 1972-11-28 1976-08-17 Nippon Steel Corporation Horizontal rectilinear type metal-electroplating method
US4183799A (en) * 1978-08-31 1980-01-15 Production Machinery Corporation Apparatus for plating a layer onto a metal strip
AU525633B2 (en) * 1980-03-07 1982-11-18 Nippon Steel Corporation Metal strip treated by moving electrolyte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, C field, vol. 6, no. 3, January 9, 1982,THE PATENT OFFICE JAPANESE GOVERNMENT,page 83 C 86 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442388A1 (de) * 1994-11-29 1996-05-30 Heraeus Elektrochemie Elektrode mit plattenförmigem Elektrodenträger
DE4442388C2 (de) * 1994-11-29 1999-01-07 Heraeus Elektrochemie Elektrode mit plattenförmigem Elektrodenträger

Also Published As

Publication number Publication date
CA1251415A (fr) 1989-03-21
ATE31560T1 (de) 1988-01-15
DK529384A (da) 1985-05-11
KR920000247B1 (ko) 1992-01-10
ES537508A0 (es) 1985-10-16
DE3468239D1 (en) 1988-02-04
KR850004134A (ko) 1985-07-01
AU3529684A (en) 1985-05-16
DK529384D0 (da) 1984-11-07
EP0142010A1 (fr) 1985-05-22
US4634504A (en) 1987-01-06
NO844498L (no) 1985-05-13
JPS60114593A (ja) 1985-06-21
ES8601338A1 (es) 1985-10-16

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