EP0024964A1 - Vorrichtung zur elektrolytischen Plattierung und diese Vorrichtung verwendendes Verchromungsverfahren - Google Patents

Vorrichtung zur elektrolytischen Plattierung und diese Vorrichtung verwendendes Verchromungsverfahren Download PDF

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Publication number
EP0024964A1
EP0024964A1 EP80401094A EP80401094A EP0024964A1 EP 0024964 A1 EP0024964 A1 EP 0024964A1 EP 80401094 A EP80401094 A EP 80401094A EP 80401094 A EP80401094 A EP 80401094A EP 0024964 A1 EP0024964 A1 EP 0024964A1
Authority
EP
European Patent Office
Prior art keywords
anode
cells
workpiece
cell
row
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
EP80401094A
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English (en)
French (fr)
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EP0024964B1 (de
Inventor
François Mortier
Jean-Jacques Sabatier
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.)
Centre Technique des Industries Mecaniques CETIM
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Centre Technique des Industries Mecaniques CETIM
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Publication of EP0024964A1 publication Critical patent/EP0024964A1/de
Application granted granted Critical
Publication of EP0024964B1 publication Critical patent/EP0024964B1/de
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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
    • 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
    • C25D7/04—Tubes; Rings; Hollow bodies

Definitions

  • the invention relates to electroplating techniques.
  • It relates to an electrolytic coating device designed to make it possible to circulate, in the vicinity of a conductive part to be coated, an electrolytic bath containing in solution salts of a metal to be deposited by electrolysis on this part, which must therefore constitute the cathode of an electrolysis cell.
  • the electrolytic coating device comprises at least one electrolysis cell containing a tubular anode and provided with inlet and outlet connections for an electrolyte bath circulating longitudinally in the anode, and a removable workpiece holder comprising means for gripping a part to be coated in electrical connection with a cathode supply plate and suitable for being mounted on the cell to close the latter and suspend the part in the axis of the anode.
  • the device comprises at least one row of several cells mounted on common support means by which they are suspended immersed in the same electrolyte tank.
  • Such support means may in particular comprise two half-plates ensuring the mounting of the anodes in their respective cells and enclosing between them an electrical supply plate of said anodes.
  • the device comprising at least one row of several cells, the associated workpiece carriers are assembled by two support half-plates enclosing said cathode feed plate between them, the latter being common to the various workpiece carriers associated with said row of cells.
  • the device comprises a grid for distributing the electrolyte fixed at the end of the anode.
  • the device according to the invention makes it possible to produce electrolytic deposits under circulation of the electrolyte. It is particularly suitable for producing hard chrome coatings on elongated parts. It allows compared to conventional devices a very significant increase in the current densities usable without burning deposits. This increase in current density leads to a significant improvement in the faradaic efficiency, and consequently to a reduction in the energy lost and consumed during the evolution of hydrogen. The reduction of hydrogen embrittlement phenomena also results from the improvement of faradaic yields. In addition, a better homogeneity of the thicknesses of the deposit is obtained along the generators of the coated elongated parts, as well as a very marked improvement in the resistance to corrosion.
  • a complete device comprises three rows of three electrolysis cells.
  • the nine cells 2 are suspended in a common tank 3, where they are partially immersed in an electrolytic bath 4, containing in solution the salts of the metal to be deposited in coating.
  • the cells themselves are fixed in this tank, while their removable covers also play the role of workpiece carrier for the cathodes which constitute the parts to be coated.
  • the 3 cells of the same row are mounted on a common suspension plate 5, which bears on the walls of the tank 3.
  • a common suspension plate 5 which bears on the walls of the tank 3.
  • the anode supply bars we have included, for example in 6, the anode current supply bars. They connect the rows of cells together, as well as connecting bars 20 which ensure the mechanical rigidity of the assembly.
  • the various cells are closed by the workpiece carriers 7 (FIG. 2), which are themselves joined in groups of three by a support plate 8 at the level of which the electrical connections for the power supply are provided. cathodic.
  • the various support plates 8 are linked together, like the plates 5, on the one hand by stiffness bars 9, on the other hand by bars current supply 10, on the sides of the tank.
  • the design of the cells is illustrated more precisely in the embodiment of a row of three cells shown in FIGS. 3 and 4 on the longitudinal section of a cell in FIG. 5.
  • Each cell is constituted by a vase 11, of cylindrical shape with conical bottom open at its upper end and by a cylindrical cap 12, mounted on the end of the vase.
  • the bottom of the vessel is provided with a connector 13 for entering the electrolyte, while the cap 12 has two outlet connectors 14 and 15 , diametrically opposite.
  • the cap 12 is held integral with the vase 11 by two half-plates 16 and 17, bolted together engaging on respective flanges of the vase and the cap. These two half - plates together constitute the suspension plate marked 5 in Figures 1 and 2. They are in fact extended to be common to the three cells of the row, thus made integral. At the ends, they are provided with eyelets 18 which facilitate the handling of the group. In the lower part, the three cells are also held integral by a spacer 19 made up of two parts joined together, so as to trap the end of the bottoms of vases in cells which they comprise for this purpose.
  • a cylindrical anode 21 provided with a flange 22 at its upper end, by which it is held between the vessel 11 and the cap 12.
  • Two annular seals 23 and 24 provide at the ends l sealing between the anode 21 and the vessel 11 or the cap 12 respectively.
  • a perforated disc, constituting a grid 25 is fixed to the lower end of the anode 21, across the circulation of the electrolyte, to ensure a good distribution of the latter.
  • a conductive plate 26 which ensures the electrical supply of the anode.
  • This plate 26 appears enclosed in the walls of the cell in the section of FIG. 5, but in the longitudinal direction of the row of cells it extends through the walls to be common to the three cells. Beyond the end cells, it is sandwiched between the two half-plates 16 and 17, from which protrude terminals 27-28 for the electrical connections.
  • the group of cells moreover carries handling devices of the grasshopper type, such as 29, the supports 31 of which are fixed to the half-plates 16 and 17. These devices are used for fitting and removing the workpiece carriers. They are fitted with pressure mechanisms 32, with jacks 33, which are articulated on the locusts. These mechanisms allow the workpiece carriers to be pressed in a sealed position on the cells. An annular seal 34 is housed in the cap 12.
  • the workpieces are grouped by three like the corresponding cells. They are joined together by two half-plates 36 and 37, linked together by bolts 38. These half-plates enclose between them, in a corresponding housing of the lower half-plate 36, a plate 39 for the electrical supply of the cathodes, whose connection terminals 41 ( Figures 3-4) project at the ends. In addition, eyelets 42 ( Figure 3) allow the handling of the removable assembly.
  • each workpiece holder forms a centering cone on the upper opening of the corresponding cell. It is fixed under the common support by three screws 44 which pass through the half-plate 36 and the supply plate 39 and the heads of which press on the latter by means of insulating washers 45.
  • the body 43 is hollow in the center.
  • An axis 46 slides vertically there with the three jaws of a clamp 47 to which it is linked by spring blades 48.
  • the three jaws are outlets to the outside of the body 43 of the workpiece carrier in the clamp open position, or on the contrary retracted inside the body 43 in the clamp closed position.
  • This clamp thus makes it possible to suspend the piece to be coated from the workpiece, for example the rod 49 shown in FIG. 7.
  • the seal in the closed position, for the electrolytic treatment, is ensured by two seals 51 and 52, between the body 43 and the clamp 47 on the one hand, the axis 46 on the other hand.
  • a cavity is provided above the workpiece holder to accommodate the axis 46 in the high position.
  • the electrical connection between the part to be coated and the supply plate 39 is provided by means of the pin 46 and the clamp 47, both made of conductive metal, by means of a ground braid 53, the ends of which are fixed. in electrical contact with the plate 39 and the head of the axis 46, supplemented by shunt braids 54 whose ends are fixed on the side of the axis 46 and in each jaw of the clamp 47 respectively.
  • the device described can be used on an industrial scale for hard chrome plating of parts such as shock absorber rods. We can operate under the following conditions, compared to those of a dead bath treatment. There is an increase in the deposition rate and in the yield compared to conventional conditions for the same bath. But the device also allows a saving of material by the use of baths weakly concentrated in chromic acid. Furthermore, the embodiment described has the further advantage of allowing the use of relatively low capacity tanks for the same production rate.

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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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP80401094A 1979-08-03 1980-07-23 Vorrichtung zur elektrolytischen Plattierung und diese Vorrichtung verwendendes Verchromungsverfahren Expired EP0024964B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7919934A FR2462490A1 (fr) 1979-08-03 1979-08-03 Dispositif de revetement electrolytique
FR7919934 1979-08-03

Publications (2)

Publication Number Publication Date
EP0024964A1 true EP0024964A1 (de) 1981-03-11
EP0024964B1 EP0024964B1 (de) 1984-01-11

Family

ID=9228584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401094A Expired EP0024964B1 (de) 1979-08-03 1980-07-23 Vorrichtung zur elektrolytischen Plattierung und diese Vorrichtung verwendendes Verchromungsverfahren

Country Status (8)

Country Link
US (1) US4303481A (de)
EP (1) EP0024964B1 (de)
JP (1) JPS5655598A (de)
DE (1) DE3066089D1 (de)
ES (1) ES493924A0 (de)
FR (1) FR2462490A1 (de)
GB (1) GB2055401B (de)
IT (1) IT1132296B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211990A (en) * 1987-08-06 1989-07-12 Spectrol Reliance Ltd Capacitive pressure sensors
WO1998006884A1 (de) * 1996-08-09 1998-02-19 Atotech Deutschland Gmbh Verfahren und vorrichtung zum elektrochemischen behandeln langgestreckter gegenstände
US6168691B1 (en) 1996-08-09 2001-01-02 Atotech Deutschland Gmbh Device for electrochemical treatment of elongate articles
EP2180088A1 (de) * 2008-10-22 2010-04-28 Enthone, Inc. Verfahren zur galvanischen Abscheidung von Hartchromschichten
CN104451841A (zh) * 2014-12-05 2015-03-25 重庆耀勇减震器有限公司 汽车前减震器连杆电镀挂具

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563540B1 (fr) * 1984-04-26 1989-05-05 Alsthom Atlantique Dispositif pour effectuer un depot metallique sur les parties frottantes d'un rotor de turbine
FR2663046B1 (fr) * 1990-06-07 1993-03-26 Traitements Surface Mecanique Procede et dispositif destines a produire un depot metallique sur des pieces.
US5660704A (en) * 1994-02-21 1997-08-26 Yamaha Hatsudoki Kabushiki Kaisha Plating method and plating system for non-homogenous composite plating coating
JPH08209384A (ja) * 1995-02-02 1996-08-13 Yamaha Motor Co Ltd 表面処理装置
US6086731A (en) * 1996-10-24 2000-07-11 Honda Giken Kogyo Kabushiki Kaisha Composite plating apparatus
US6652657B2 (en) 2000-07-31 2003-11-25 United Technologies Corporation Method for electrochemically treating articles and apparatus and method for cleaning articles
US6547945B2 (en) * 2000-07-31 2003-04-15 United Technologies Corporation Method and apparatuses for electrochemically treating an article
FI114811B (fi) * 2002-02-08 2004-12-31 Stratum Oy Pinnoitusmenetelmä ja -laite
US20060118411A1 (en) * 2004-12-07 2006-06-08 H & T Marsberg Gmbh & Co. Kg Process and apparatus for multiple surface treatments of battery cans
DE102005016004A1 (de) * 2005-04-07 2006-10-12 Robert Bosch Gmbh Aufnahme eines Bauteils zur insbesondere galvanischen Behandlung in einem Prozessraum
DE102008001881A1 (de) * 2008-05-20 2009-11-26 Robert Bosch Gmbh Vorrichtung und Verfahren zur elektrochemischen Bearbeitung
CN104451839A (zh) * 2014-12-05 2015-03-25 重庆耀勇减震器有限公司 拉杆下连接挂具
US11542626B2 (en) 2020-10-08 2023-01-03 Honeywell International Inc. Systems and methods for enclosed electroplating chambers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034447B (de) * 1955-04-09 1958-07-17 Benteler Werke Ag Einrichtung fuer die gleichzeitige elektrolytische Behandlung der Innen- und Aussenwandungen mehrerer metallischer Hohlkoerper grosser Laenge, insbesondere von Rohren
DE1103103B (de) * 1958-11-13 1961-03-23 Daimler Benz Ag Vorrichtung zum galvanischen Verchromen der Aussenflaeche langgestreckter zylindrischer Koerper, insbesondere von Tellerventilschaeften
FR1329717A (fr) * 1962-05-04 1963-06-14 Procédé de chromage électrolytique et dispositif pour sa mise en oeuvre

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2739937A (en) * 1952-09-05 1956-03-27 Clarence W Forestek Aligned anode apparatus
US3065153A (en) * 1958-10-15 1962-11-20 Gen Motors Corp Electroplating method and apparatus
US3888755A (en) * 1973-06-04 1975-06-10 Bruce Evans Wallace Cylinder plating rack
JPS51119333A (en) * 1975-04-14 1976-10-19 Taisei Corp Method of vertical alignment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034447B (de) * 1955-04-09 1958-07-17 Benteler Werke Ag Einrichtung fuer die gleichzeitige elektrolytische Behandlung der Innen- und Aussenwandungen mehrerer metallischer Hohlkoerper grosser Laenge, insbesondere von Rohren
DE1103103B (de) * 1958-11-13 1961-03-23 Daimler Benz Ag Vorrichtung zum galvanischen Verchromen der Aussenflaeche langgestreckter zylindrischer Koerper, insbesondere von Tellerventilschaeften
FR1329717A (fr) * 1962-05-04 1963-06-14 Procédé de chromage électrolytique et dispositif pour sa mise en oeuvre

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 77, 1972 abrégé 121448a, pages 516-517, Columbus, Ohio, US, N.P. KOVAL et al.: "Chromium electrodeposition in circulating electrolyte", & Elektron. Obrab. Mater. 1972, (2), 42-7. *
METAL FINISHING, vol. 72, no. 1 janvier 1974, KONISHI et al.: "Chromium Plating from Dilute Baths", pages 56-58. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2211990A (en) * 1987-08-06 1989-07-12 Spectrol Reliance Ltd Capacitive pressure sensors
GB2211990B (en) * 1987-08-06 1991-09-11 Spectrol Reliance Ltd Capacitive pressure sensors
WO1998006884A1 (de) * 1996-08-09 1998-02-19 Atotech Deutschland Gmbh Verfahren und vorrichtung zum elektrochemischen behandeln langgestreckter gegenstände
US6168691B1 (en) 1996-08-09 2001-01-02 Atotech Deutschland Gmbh Device for electrochemical treatment of elongate articles
EP2180088A1 (de) * 2008-10-22 2010-04-28 Enthone, Inc. Verfahren zur galvanischen Abscheidung von Hartchromschichten
WO2010048404A1 (en) * 2008-10-22 2010-04-29 Enthone Inc. Method for galvanic deposition of hard chrome layers
CN104451841A (zh) * 2014-12-05 2015-03-25 重庆耀勇减震器有限公司 汽车前减震器连杆电镀挂具

Also Published As

Publication number Publication date
FR2462490A1 (fr) 1981-02-13
IT8023887A0 (it) 1980-08-01
JPS5655598A (en) 1981-05-16
IT1132296B (it) 1986-07-02
ES8106565A1 (es) 1981-08-01
GB2055401A (en) 1981-03-04
FR2462490B1 (de) 1983-12-02
EP0024964B1 (de) 1984-01-11
DE3066089D1 (en) 1984-02-16
GB2055401B (en) 1983-02-23
ES493924A0 (es) 1981-08-01
US4303481A (en) 1981-12-01

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