EP0922791B1 - Elektroplattierungsanlage, Verwendung von Elektrode und Gegenhalter dafür und Elektroplattierungsverfahren - Google Patents
Elektroplattierungsanlage, Verwendung von Elektrode und Gegenhalter dafür und Elektroplattierungsverfahren Download PDFInfo
- Publication number
- EP0922791B1 EP0922791B1 EP98402805A EP98402805A EP0922791B1 EP 0922791 B1 EP0922791 B1 EP 0922791B1 EP 98402805 A EP98402805 A EP 98402805A EP 98402805 A EP98402805 A EP 98402805A EP 0922791 B1 EP0922791 B1 EP 0922791B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrodes
- electroplating
- bearing
- solution
- interface
- 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
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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
- C25D7/0635—In radial cells
-
- 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
- C25D17/005—Contacting devices
-
- 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
- C25D17/06—Suspending or supporting devices for articles to be coated
Definitions
- the invention relates, in the bath of an electroplating installation, the support of the submerged electrodes and the supply of current to these electrodes, especially in the case of electrodes which are soluble anodes and consumables and must be interchangeable during electrodeposition.
- An installation of this type is for example an installation electrogalvanizing of steel strips in an electrolytic bath based on chlorides.
- soluble anodes of zinc or zinc alloy For electrogalvanizing in a chloride medium, generally soluble anodes of zinc or zinc alloy.
- the electrodes 3 are formed by curved bars facing the roller 1 along the direction of travel of the strip and are grouped in sets of electrodes arranged side by side so as to form a portion of cylindrical generator partially enveloping the roller 1 in the electroplating bath, as illustrated in Figures 1 and 2.
- each support member 2, 4 is common to all the electrodes 3 of the same set; more specifically in the example given here, each support member 2, 4 is formed by an oriented beam transversely to the strip running path on which come lean all the electrodes 3 of a set and each electrode 3 is retained against this beam by means of an electrode hook 31.
- the electrodes 3 are consumable (case of soluble anodes), their thickness varies (see Figure 3) depending on the level of wear and should be to be able to change them during plating as they are dissolution.
- the electrodes 3 are made to slide. of the same clearance on the support members 2, 4 respectively in the directions A, B (see Figure 3), so as to remove a worn electrode at one end beam while making room for a new electrode at the other end.
- each electrode 3 only rests by simple support by its own weight on its support member 2, 4 at the level interface 6; the electrodes therefore rest freely on their organ support.
- the support member also serves to supply all the electrodes of a set in electric current of electroplating.
- the pressure exerted at the interface 6 on the support member generally does not exceed 10 4 Pa, or 1 Newton per cm 2 of bearing surface.
- this bearing force may even be less than 0.1 Newton per cm 2 of bearing surface (10 3 Pa).
- bearing surface is meant the total area at the interface 6 between the electrode and the support member.
- the object of the invention is to reduce the electrical contact losses at level of the interfaces 6 and to increase the lifetime of the support members 2, 4 of the electrodes 3.
- the invention therefore also relates to a support and supply member.
- current for electrodeposition electrodes provided with a support surface, sliding and electrical contact with said electrodes, characterized in that said surface has grooves.
- this support member mainly consists of graphite at the level of said surface.
- the invention therefore also relates to the use of an electrodeposition electrode intended to rest on a support member, provided with a support surface, sliding and electrical contact with said member, characterized in that said surface has grooves opening into said bath.
- this electrode consists essentially of zinc or zinc alloy.
- the invention also relates to a method of electrodeposition in the installation according to the invention, characterized in that, during the electrodeposition operation and at the level of said interface, the bearing force of said electrodes immersed on said organs support is less than 1 Newton per cm 2 of support surface and bearing surface, or even less than 0.1 Newton per cm 2 .
- a support member 2 of electrode 3 is shown in FIG. 7.
- the contact surface 6B of the support member has grooves 7; a groove detail 7 is shown in Figure 7A; these grooves 7 are never closed, even when electrodes 3 are in support on the surface 6B; so they lead into the bath when the installation is in operation.
- the width and density of the grooves 7 is adapted to that the total area of the grooves does not represent more than 30% of the area bearing 6B.
- the present invention also relates to the case where the grooves are made on the bearing surface 6A of the electrode.
- the present invention also relates to the more general case where the interface 6 is adapted, at the support surface 6A from electrodes and / or the bearing surface 6B of the support member 2, 4, to spare, in the interface 6, grooves 7 opening into said bath.
- the electroplating installation includes a support interface (6) having grooves (7) opening into the bath.
- the invention therefore makes it possible to increase the life of the support members. 2, 4 of electrodes, or even, if necessary, of the electrodes 3 themselves.
- the invention applies to all types of electroplating installation where the electrical contact between the electrodes and their supporting members is immersed in the bath, the essential means of the invention residing in the presence of grooves opening into the bath at the electrical contact interface 6.
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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)
- Electrolytic Production Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Bathtubs, Showers, And Their Attachments (AREA)
Claims (19)
- Tragteil (2,4) für die Abstützung von und die Stromzufuhr zu Elektroden (3) für die Elektrobeschichtung, das mit einer Fläche (6B) zur Abstützung, zum Gleiten und für den elektrischen Kontakt mit den Elektroden (3) versehen ist, wobei das Tragteil (2,4) und die Elektroden (3) in ein Bad (5) für die Elektrobeschichtung eingetaucht sind, dadurch gekennzeichnet, dass die Fläche (6B) mit Nuten (7) versehen ist, die im Bad (5) münden.
- Tragteil nach Anspruch 1, dadurch gekennzeichnet, dass es auf Höhe der Fläche (6B) im wesentlichen aus Graphit besteht.
- Verwendung des Tragteils (2,4) nach einem der Ansprüche 1 bis 2 für die Abstützung löslicher Anoden-Elektroden, die in ein Bad für die Elektrobeschichtung eingetaucht sind, wobei die Fläche (6B) während der Elektrobeschichtung in das Bad eingetaucht ist.
- Verwendung einer Elektrode (3) für die Elektrobeschichtung, die auf einem Tragteil (2,4) für die Abstützung angeordnet ist, die mit einer Fläche (6A) zur Abstützung, zum Gleiten und für den elektrischen Kontakt mit dem Tragteil (2,4) versehen ist, dadurch gekennzeichnet, dass die Fläche (6A) Nuten aufweist, die im Bad (5) für die Elektrobeschichtung münden.
- Verwendung nach Anspruch 4, dadurch gekennzeichnet, dass sie im wesentlichen aus Zink oder aus einer Zinklegierung besteht.
- Anlage zur Elektrobeschichtung der leitenden Oberfläche eines Bauteils, mit:einem Bad für die Elektrobeschichtung,in das Bad eingetauchten Elektroden (3), die sich auf mindestens einem Tragteil (2,4) abstützen, das sowohl der Abstützung als auch der Stromzufuhr zu den Elektroden (3) dient und das, zusammen mit den Elektroden (3), eine Zwischenfläche (6) der Abstützung aufweist, die in das Bad eingetaucht ist,einer Anordnung zur Führung und/oder Halterung des Bauteils im Bad gegenüber den Elektroden,einer Anordnung um einen elektrischen Strom für die Elektrobeschichtung zwischen der zu beschichtenden Oberfläche und den Elektroden (3) über wenigstens ein Tragteil (2,4) fliessen zu lassen,
- Anlage nach Anspruch 6, dadurch gekennzeichnet, dass die Elektroden (3) frei auf dem zugehörigen Tragteil (2,4) angeordnet sind.
- Anlage nach einem der Ansprüche 6 bis 7, dadurch gekennzeichnet, dass auf Höhe der Zwischenfläche (6) die Stützkraft der eingetauchten Elektroden (3) auf die Tragteile (2,4) kleiner ist als 1 Newton pro cm2 Stützfläche und Tragfläche.
- Anlage nach Anspruch 8, dadurch gekennzeichnet, dass die Stützkraft kleiner ist als 0,1 Newton pro cm2.
- Anlage nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass sie eine Anordnung aufweist um während der Elektrobeschichtung die Elektroden (3) auf dem Tragteil (2,4) durch einen Gleitvorgang auf Höhe der Zwischenfläche (6) zu verschieben.
- Anlage nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass wenigstens eines der Tragteile (2,4) gemäss einem der Ansprüche 1 bis 2 ausgestaltet ist.
- Anlage nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass die Elektroden (3) nach einem der Ansprüche 4 bis 5 ausgestaltet sind.
- Anlage zur kontinuierlichen Elektrobeschichtung eines metallischen Bandes nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass :die Anordnung zur Führung und zur Halterung aus der Anordnung für den Durchlauf des Bandes durch das Bad besteht,die Elektroden (3) aus Stangen bestehen, die sich entlang des Durchlaufweges im Bad erstrecken und aus wenigstens einer Gruppe von Elektroden (3) bestehen, die nebeneinander und gegenüber dem Durchlaufweg des Bandes angeordnet sind,jedes Tragteil (2,4) aus einem Balken besteht, der sich quer zur Anordnung für den Durchlauf erstreckt und jede Elektrode (3) der Gruppe trägt,die Anordnung zum Gleiten in der Lage ist, die Elektroden (3) der Gruppe entlang des entsprechenden Balkens zu verschieben.
- Anlage nach Anspruch 13, dadurch gekennzeichnet, dass:die Anordnung zum Durchlauf des Bandes eine Tragrolle (1) für das Band aufweist, die wenigstens teilweise eingetaucht istdie Elektroden (3) eine Krümmung aufweisen, deren Radius in der Nähe desjenigen der Rolle (1) liegt, sodass jede Gruppe von Elektroden einen Teil einer zylindrischen Erzeugenden bildet, die teilweise die Rolle (1) im Bad umgibt.
- Verfahren zur Elektrobeschichtung der leitenden Oberfläche eines Bauteils in einer Anlage nach einem der Ansprüche 6 bis 12 oder der Oberfläche eines Bandes in einer Anlage nach einem der Ansprüche 13 bis 14, dadurch gekennzeichnet, dass während des Vorgangs der Elektrobeschichtung und auf Höhe der Zwischenschicht (6) die Stützkraft der eingetauchten Elektroden (3) auf die Tragteile (2,4) kleiner ist als 1 Newton pro cm2 Stützfläche (6A) und Tragfläche (6B).
- Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass die Stützkraft kleiner ist als 0,1 Newton pro cm2.
- Verfahren nach einem der Ansprüche 15 bis 16, dadurch gekennzeichnet, dass während des Vorgangs der Elektrobeschichtung die Dichte des elektrischen Stromes, der von der Anordnung zur Zufuhr des elektrischen Stromes stammt, grösser oder gleich 0,025 A/mm2 ist auf Höhe der Zwischenschicht (6).
- Verfahren nach einem der Ansprüche 15 bis 17, dadurch gekennzeichnet, dass die Anoden (3) während der Elektrobeschichtung aufgelöst werden.
- Verfahren nach Anspruch 18, dadurch gekennzeichnet, dass das Bad ein Bad auf der Basis von Chloriden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9715179A FR2771757B1 (fr) | 1997-12-03 | 1997-12-03 | Installation d'electrodeposition, electrode et organe d'appui pour cette installation et procede d'electrodeposition |
FR9715179 | 1997-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0922791A1 EP0922791A1 (de) | 1999-06-16 |
EP0922791B1 true EP0922791B1 (de) | 2003-03-05 |
Family
ID=9514070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402805A Expired - Lifetime EP0922791B1 (de) | 1997-12-03 | 1998-11-13 | Elektroplattierungsanlage, Verwendung von Elektrode und Gegenhalter dafür und Elektroplattierungsverfahren |
Country Status (7)
Country | Link |
---|---|
US (2) | US6129820A (de) |
EP (1) | EP0922791B1 (de) |
JP (1) | JPH11229197A (de) |
AT (1) | ATE233835T1 (de) |
DE (1) | DE69811836T2 (de) |
ES (1) | ES2192313T3 (de) |
FR (1) | FR2771757B1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2771757B1 (fr) * | 1997-12-03 | 1999-12-31 | Lorraine Laminage | Installation d'electrodeposition, electrode et organe d'appui pour cette installation et procede d'electrodeposition |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR52384E (fr) | 1942-11-24 | 1943-03-14 | Phrix Arbeitsgemeinschaft | Procédé de fabrication de laine synthétique bouclée d'après le procédé à la viscose |
DE2324834C2 (de) * | 1973-05-17 | 1978-09-07 | Dr. Eugen Duerrwaechter Doduco, 7530 Pforzheim | Vorrichtung zum kontinuierlichen selektiven Bandgalvanisieren |
DE3043207A1 (de) * | 1980-11-15 | 1982-07-08 | Metallgesellschaft Ag, 6000 Frankfurt | Loesbarer anschlusskontakt fuer hochstromleiter |
JPS6082700A (ja) * | 1983-10-07 | 1985-05-10 | Kawasaki Steel Corp | ラジアルセル型めつき槽におけるカウンタ−フロ−装置 |
FR2653787B1 (fr) * | 1989-10-27 | 1992-02-14 | Lorraine Laminage | Installation et procede de revetement electrolytique d'une bande metallique. |
US5228965A (en) * | 1990-10-30 | 1993-07-20 | Gould Inc. | Method and apparatus for applying surface treatment to metal foil |
US5685970A (en) * | 1992-07-01 | 1997-11-11 | Gould Electronics Inc. | Method and apparatus for sequentially metalized polymeric films and products made thereby |
FR2771757B1 (fr) * | 1997-12-03 | 1999-12-31 | Lorraine Laminage | Installation d'electrodeposition, electrode et organe d'appui pour cette installation et procede d'electrodeposition |
-
1997
- 1997-12-03 FR FR9715179A patent/FR2771757B1/fr not_active Expired - Fee Related
-
1998
- 1998-11-13 DE DE69811836T patent/DE69811836T2/de not_active Expired - Fee Related
- 1998-11-13 EP EP98402805A patent/EP0922791B1/de not_active Expired - Lifetime
- 1998-11-13 AT AT98402805T patent/ATE233835T1/de not_active IP Right Cessation
- 1998-11-13 ES ES98402805T patent/ES2192313T3/es not_active Expired - Lifetime
- 1998-12-03 JP JP10344434A patent/JPH11229197A/ja not_active Withdrawn
- 1998-12-03 US US09/204,545 patent/US6129820A/en not_active Expired - Fee Related
-
2000
- 2000-08-14 US US09/637,026 patent/US6334943B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6334943B1 (en) | 2002-01-01 |
ES2192313T3 (es) | 2003-10-01 |
EP0922791A1 (de) | 1999-06-16 |
FR2771757A1 (fr) | 1999-06-04 |
DE69811836T2 (de) | 2004-05-19 |
DE69811836D1 (de) | 2003-04-10 |
US6129820A (en) | 2000-10-10 |
ATE233835T1 (de) | 2003-03-15 |
FR2771757B1 (fr) | 1999-12-31 |
JPH11229197A (ja) | 1999-08-24 |
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