EP2855739B1 - Vorrichtung zur elektrochemischen behandlung, insbesondere lokal, eines leitersubstrats - Google Patents

Vorrichtung zur elektrochemischen behandlung, insbesondere lokal, eines leitersubstrats Download PDF

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Publication number
EP2855739B1
EP2855739B1 EP13731381.3A EP13731381A EP2855739B1 EP 2855739 B1 EP2855739 B1 EP 2855739B1 EP 13731381 A EP13731381 A EP 13731381A EP 2855739 B1 EP2855739 B1 EP 2855739B1
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EP
European Patent Office
Prior art keywords
electrolyte
head
handle
pump
space
Prior art date
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Active
Application number
EP13731381.3A
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English (en)
French (fr)
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EP2855739A1 (de
Inventor
Jean Pierre CHAIX
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.)
Dalic Laboratoire SA
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Dalic Laboratoire SA
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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
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/10—Agitating of electrolytes; Moving of racks
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/022—Anodisation on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • 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
    • C25D5/04—Electroplating with moving electrodes
    • C25D5/06—Brush or pad plating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Definitions

  • the present invention relates to a device for the electrochemical treatment, in particular localized, of a conductive substrate by displacement on said substrate, and usable in any position.
  • Such a device makes it possible, in particular, to produce electrochemically formed metal coatings and to perform localized recharging or retouching on metallic surfaces.
  • surfaces In the automotive, aeronautical or rail industry, it often happens that surfaces have to be prepared before assembly or before another surface treatment.
  • metal parts or surfaces may also be subject to wear, scratching, scuffing, or corrosion that justifies such localized metal touch-ups.
  • electrochemical treatment devices are already known such as, for example, devices of the buffer type, as well as devices using chambers or cells with electrolyte circulation or with gels in order to avoid electrolyte flows.
  • the electrolyte leakage in particular during the displacement of the device on the substrate, presents a real danger for the neighboring areas not to be treated and for the operator, because of the often corrosive nature of the electrolytes used.
  • an electrochemical treatment device which comprises an envelope provided with an opening and defining a space, an electrode disposed in this space and intended to be connected to one of the terminals of a source of electric current, the conductive substrate being intended to to be connected to the other terminal of this source, and an electrolyte supply and an electrolyte outlet, both in communication with said space.
  • this device has disadvantages in that the same tool can not be used on different surfaces to be treated, such as flat surfaces and convex shaped surfaces.
  • this device can not always fix accurately or maintain the flow of electrolyte which is however a defining characteristic for the quality of the electrochemical treatment.
  • the objective of the present invention is therefore to overcome the aforementioned drawbacks and to propose a device for the electrochemical treatment which makes it possible to obtain an improved quality of deposition while being usable in different configurations of surfaces to be treated.
  • the present invention relates to a device for the electrochemical treatment, in particular localized, of a conductive substrate by displacement on said substrate and usable in any position, comprising a head, a power supply and an electrolyte output comprising each a flexible tube, the head comprising an envelope provided with an opening and defining a space, an electrode disposed in this space and intended to be connected to one of the terminals of an electric power source, the conductive substrate being intended to be connected to the other terminal of this source, a portion of the electrolyte supply and a portion of the electrolyte outlet, both in communication with said space, and a body of absorbent material, flexible, non-conductive of electricity and permeable to gases and liquids, this body being in contact with said electrode and closing said opening protruding from the latter, the device further comprising two peristaltic pumps, a first pump mounted on said electrolyte supply and a second pump mounted on said electrolyte outlet, the flow rate of the second pump being greater than that of the first pump so as
  • the device according to the invention allows a high quality electrochemical treatment, thanks to the control of the flow of the electrolyte, while being usable on a large variety of surfaces to be treated.
  • the head of the device is arranged so that the electrolyte arriving in the interior space of the head is partly retained by the absorbent material body with which it comes into contact, thus ensuring electrical continuity between the electrode and the substrate. driver to treat. Moreover, due to the depression prevailing within this space, there is continuous suction of the excess electrolyte. The electrolyte is thus renewed continuously, which contributes to the dissipation of the heat generated by the electrochemical treatment. In addition, and always because of this depression, there is continuous suction of outside air through the entire mass of the body of absorbent material, which limits any inadvertent flow through said opening and this, whatever the position of use of the device. In addition, this air suction ensures partial cooling of the electrolyte heating under the application of high intensity currents.
  • said electrolyte supply portion of the head opens into said space in the vicinity of said body of absorbent material, it being specified that the electrolyte supply portion preferably comprises less a hole made in the electrode and opening on the surface of this electrode, in the area of contact of the latter with said body of absorbent material.
  • the electrolyte as soon as it leaves the electrolyte supply, arrives directly on the absorbent material body to spread uniformly throughout the mass of this body.
  • said electrolyte outlet portion of the head originates in said space preferably in the vicinity of said body of absorbent material.
  • the absorbent material constituting the body used in the head of the device of the invention may in particular be made of a material having chemical resistance properties with respect to the electrolyte and thermal resistance in the working temperature range (from 15 ° C to 60 ° C).
  • This material must also be non-conductive of electricity and permeable to gases and liquids; finally, it should be chosen not to scratch the substrate to be treated.
  • This may for example be polyester wadding or a textile material, woven or non-woven, made of fibers or nylon felt.
  • the source of electric current may be a source of pulsed current or direct current.
  • the front face of the electrode may be flat if the device is to be used to treat a flat, convex surface or have an edge.
  • the front face of the electrode has a convex surface, for example a curved surface or even an angled section.
  • This embodiment is particularly suitable for the treatment of concave surfaces, for example an angle iron.
  • the head of the device is intended to be fixed on the handle, so that the respective portions of the feed and the electrolyte outlet of said handle and head are facing each other and connected to form a power supply and an electrolyte outlet passing through the head and the handle.
  • the head is removable from the handle of the device makes it possible to use the same device on different types of surfaces to be treated, by changing the head of the device or by modifying its adaptation on the sleeve.
  • the end of the head by which it is intended to be fixed on the handle has a solid surface.
  • the user will thus adapt the shape and size of the head of the device according to the surface to be treated.
  • the head and the handle of said device are coaxial, this embodiment being particularly suitable for the treatment of flat surfaces.
  • the head and the handle of said device form an angle between 0 and 90 °.
  • This embodiment is particularly advantageous for the treatment of convex surfaces or surfaces having a bore.
  • the head and the handle of said device can be fixed to one another by various means known to those skilled in the art.
  • the head of said device is clip on said handle.
  • a connector can be inserted between the head and the handle, to change the inclination between the head and the handle.
  • the device further comprises a device FRL (filtration and regulation) air supply.
  • FRL filtration and regulation
  • Such a device FR further improves the cooling of the electrolyte by Venturi effect.
  • the temperature of the electrolyte is decisive as regards the quality of the layer formed on the surface to be treated.
  • an FR device By using an FR device, it ensures the supply of clean air and regulated pressure, which avoids punctual stops of the device (in order to wait for the return to a suitable temperature).
  • the use in the device of a flowmeter and a brushless motor (brushless) for the pumps makes it possible to ensure the control and the regularity of the flow rates of the electrolyte supply and outlet, because the absence of broom prevents variation of rotation of the pump.
  • the device further comprises a display device for monitoring in real time the evolution of the flow rate of the electrolyte.
  • the device according to the invention may also be accompanied by software for implementing pre-established treatment programs. The user will only have to follow the instructions issued on the display device to begin the implementation of the electrochemical treatment.
  • the device as defined above allows the realization of all types of electrochemical treatments. It may be first of all the realization of an electrolytic deposit; in this case, the substrate to be treated will constitute the cathode and the electrode of the device will constitute the anode, this electrode being made of an insoluble material in the treatment conditions. It may also be a demetallization treatment using a demetallization electrolyte, the substrate to be treated being chosen as anode and the electrode of the device as a cathode. It may finally be an anodizing treatment of any substrate to be treated consisting of an oxidizable material such as aluminum, titanium and their alloys; in this application, the substrate to be treated will be chosen as the anode and the electrode of the device as the cathode.
  • the figure 1 represents a device according to the invention for the anodic oxidation for preparing a surface S of an aluminum part A, before bonding.
  • the device comprises a head 1 and a handle 2.
  • the head 1 comprises an envelope 3 having a lateral wall 4, a rear wall 5 and a front opening 6 opposite to the rear wall 5.
  • This envelope defines an internal space 7 in which is housed a cathode 8 facing the opening 6.
  • the cathode 8 has a front face 8b, in contact with a buffer 18 of absorbent material, flat, and may, for example, have a circular cross-section, square or rectangular, the useful cathode surface may vary from a few mm ⁇ 2> to a few cm ⁇ 2>.
  • the cathode 8 is also maintained in the space 7 by any means and in particular by fixing, by its rear face 8a, at least two points to the rear wall of the casing 3.
  • the cathode 8 has dimensions such as on the one hand, it delimits with the inner face of the side wall 4 of the casing 3 a continuous peripheral chamber and on the other hand, this front face 8b is located at a distance from the
  • the cathode 8 is provided with a bore 12 originating on its rear face 8a and opening on its front face 8b. Although only one hole is shown on the figure 1 , it is advantageous to provide several holes so that they open uniformly over the entire front face of the cathode 8. This or these holes 12 are connected, at the rear face 8a of the electrode, by a connector 13, to a conduit 14 electrolyte supply.
  • the wall 4 of the casing 3 is furthermore provided with a bore 15 extending from the inside face of this wall 4 to the outer face of the latter, where it is connected by a connection 16 to a duct 17. evacuation of electrolyte.
  • the opening 6 is closed by a buffer of absorbing material 18 whose thickness is chosen so that on the one hand, it is in contact with the entire front face 8b of the electrode 8 and on the other hand, protrudes slightly outside said opening, it being specified that the bore 15 will be made in such a way that it opens into the space 7 at a point sufficiently far from the opening 4 so that this point is not covered by said pad 18.
  • the handle 2 of the device according to the invention comprises an envelope 20 which defines an internal space 21, generally in the same material as that of the envelope 3 of the head 1, and has a front wall 22 and a side wall 23.
  • the internal space 21 of the handle 2 also comprises a connecting cable 19 to the "minus" terminal 9 of a generator G of current, in particular pulsed current, whose "plus” terminal 10 is connected to a point 11 of the workpiece A, said cable opening on the front wall of the casing 22 so as to be located facing the portion of the rear face 8a of the cathode 8 opening on the rear face of the head 1.
  • the electrode 8 is connected to the "plus" terminal of the generator G.
  • the duct 24 is connected to the suction of a peristaltic pump 26, the discharge of which is connected to a duct 27 which communicates with the reserve R of electrolyte E.
  • conduit 25 it is connected to the discharge of a peristaltic pump 28 whose suction is connected to a conduit 29 whose free end is immersed in the electrolyte of the reserve R.
  • the peristaltic pumps 26 and 28 comprise two rotors provided with peripheral rollers and mounted axially on a shaft adapted to be rotated by a brushless motor.
  • the flow rate of the pump 26 is controlled by a flowmeter (not shown) making it possible to set and modify the flow rate of the pump in real time so as to adapt it best to the conditions of use of the device of the invention.
  • the head 1 and the handle 2 are fixed to each other at their rear wall 5 and front wall 22 respectively, removably by any suitable fastening means, in particular by clipping.
  • the head 1 and the handle 2 are coaxial, but it is also possible that they form an angle between 0 and 90 ° C.
  • the head 1 and the handle 2 are clipped on one another, then the peristaltic pumps 26 and 28 are brought into action.
  • the electrolyte E of the reserve R is sucked by the pump 26 and brought from the reserve R via the conduit 27, the pump 26, the conduits 24 and 14 and the bore 12 on the buffer 18 which is thus impregnated with the electrolyte.
  • the flow rate of the pump 26, fixed by means of the flowmeter is chosen so that a quantity sufficient electrolyte reaches the buffer 18 to perform anodic oxidation under good conditions.
  • the flow rate of the pump 28 is fixed so as to create, inside the casing 3, a sufficient vacuum without drying the pad 18.
  • the electrode 8 and the part A are connected to the current generator G.
  • the device is then operational to carry out the anodic oxidation and it suffices to move this device, manually or mechanically, on the surface S to be treated and orthogonally with respect to this surface.
  • the two pumps 26 and 28 are peristaltic pumps which comprise two rotors both mounted axially on a common shaft adapted to be rotated by a drive motor.
  • the rotors comprise at their peripheries pebbles.
  • Said pumps 26 and 28 also comprise a first bearing surface on which is applied a flexible tube connecting the conduits 14, 24 and 27 shown in FIG. figure 1 , and a second bearing surface on which is applied a flexible tube connecting the ducts 17, 25 and 29 shown in FIG. figure 1 .
  • the rotors are arranged and dimensioned in diameter so that their rollers compress the flexible tubes crushing, so that when the rotors are rotated, said rollers moving along the flexible tubes advance the electrolyte in these same tubes.
  • the diameter of the rotors and / or the diameter of the flexible tubes are furthermore chosen so that the flow rate at the outlet of the tube connected to the electrolyte evacuation conduits is greater than that at the outlet of the tube connected to the supply ducts of the tube. electrolyte so as to create a depression within the interior space 7.
  • the figure 2 represents an alternative of the device according to the invention similar to that presented to the figure 1 but in which the front face 8b 'of the cathode 8' in contact with the pad 6 'and has a square section.
  • the device of the figure 2 is particularly suitable for the treatment of the surface S 'which has an angle of 90 ° C.
  • the device according to the invention is able to be implemented on parts of various shapes and volumes, and is not limited to flat surfaces. Thus, it can be used on surfaces to be treated which have dimensions of a few square centimeters to a few square decimetres or at joints of sheet metal, flat or in "step"; or on convex surfaces or sharp edges.
  • the surfaces to be treated may furthermore have all the inclinations; in particular, it is possible to modify the ceiling.
  • electrochemical treatment alterations may, according to the invention, be carried out either in a fixed position in a laboratory or in a workshop, or in a mobile station for on-site interventions. In the latter case, it will advantageously benefit from the total absence of flow out of the device whatever its position (this due to the depression created by the two pumps).

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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)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (7)

  1. Vorrichtung zur elektrochemischen Behandlung, insbesondere lokalisiert, eines Leitersubstrats (S) durch Bewegung auf dem Substrat und in sämtlichen Positionen verwendbar, umfassend einen Kopf (1), eine Versorgung und einen Elektrolytausgang, die jeweils eine flexible Rohrleitung umfassen,
    wobei der Kopf (1) Folgendes umfasst: eine Umhüllung (3), die mit einer Öffnung (6) versehen ist und einen Raum (7) definiert, eine Elektrode (8), die in diesem Raum (6) angeordnet ist und für die Verbindung mit einer der Klemmen (9) einer elektrischen Stromquelle bestimmt ist, wobei das Leitersubstrat (S) für die Verbindung mit der anderer Klemme (10) dieser Quelle bestimmt ist, einen Teil der Elektrolytversorgung (14) und einen Teil des Elektrolytausgangs (17), die beide mit dem Raum (7) in Verbindung stehen, und einen Körper (18) aus einem Absorptionsmaterial, das flexibel, elektrisch nicht leitend und gegenüber Glasen und gegenüber Flüssigkeiten undurchlässig ist, wobei dieser Körper (18) mit der Elektrode (8) in Kontakt ist und die Öffnung (6) verschließt, indem er aus dieser letzten auskragt,
    wobei die Vorrichtung ferner zwei Peristaltikpumpen (26, 28) umfasst, eine erste Pumpe (26), die an der Elektrolytversorgung montiert ist, und eine zweite Pumpe (28), die an dem Elektrolytausgang montiert ist, wobei der Durchsatz der zweiten Pumpe (25) höher ist als der der ersten Pumpe (26), so dass ein Unterdruck in dem Raum (7) des Kopfes (1) erzeugt wird,
    dadurch gekennzeichnet, dass die Vorrichtung ferner einen Schaft (2) aufweist, an dem der Kopf (1) befestigt werden soll und der Folgendes umfasst: eine Umhüllung (20), einen Teil der Elektrolytversorgung (24) und einen Teil des Elektrolytausgangs (25), die dazu bestimmt sind, an den Teilen der Elektrolytversorgung (14) bzw. des Elektrolytausgangs (17) des Kopfes (1) angeschlossen zu werden,
    der Kopf (1) der Vorrichtung von dem Schaft (2) lösbar ist,
    die erste und die zweite Pumpe (26, 28) zwei Läufer umfassen, die mit Umfangsrollen versehen sind und auf einer Welle, die durch einen bürstenlosen Motor zur Drehung angetrieben werden kann, axial gelagert sind, wobei die Rollen eines der Läufer mit der flexiblen Rohrleitung der Elektrolytversorgung zusammenwirken und die Rollen des anderen Läufers mit der flexiblen Rohrleitung des Elektrolytausgangs zusammenwirken und die Durchmesser der Läufer und/oder der flexiblen Rohrleitungen gewählt sind, um den Unterdruck in dem Raum zu erzeugen,
    und dass die Vorrichtung ferner einen Durchflussmesser zur Regelung und Steuerung des Durchsatzes der ersten Pumpe (26) sowie des Durchsatzes des Elektrolyten in dem Elektrolytversorgungsteil (14) des Kopfes (1) aufweist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kopf (1) und der Schaft (2) koaxial sind.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kopf (1) und der Schaft (2) einen Winkel in einem Bereich zwischen 0 und 90 °C bilden.
  4. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Kopf (1) der Vorrichtung an dem Schaft (2) einrastbar ist.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie ferner eine FR-Vorrichtung (Filtrierung und Regelung) für die Luftversorgung umfasst.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Fläche der Elektrode (8) in Kontakt mit dem Körper (18) aus Absorptionsmaterial eben ist.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Fläche der Elektrode (8) in Kontakt mit dem Körper aus Absorptionsmaterial (18) konvex ist.
EP13731381.3A 2012-06-01 2013-05-31 Vorrichtung zur elektrochemischen behandlung, insbesondere lokal, eines leitersubstrats Active EP2855739B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1255106A FR2991343B1 (fr) 2012-06-01 2012-06-01 Dispositif pour le traitement electrochimique, notamment localise, d'un substrat conducteur
PCT/FR2013/051227 WO2013178959A1 (fr) 2012-06-01 2013-05-31 Dispositif pour le traitement electrochimique, notamment localise, d'un substrat conducteur

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Publication Number Publication Date
EP2855739A1 EP2855739A1 (de) 2015-04-08
EP2855739B1 true EP2855739B1 (de) 2016-03-02

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EP13731381.3A Active EP2855739B1 (de) 2012-06-01 2013-05-31 Vorrichtung zur elektrochemischen behandlung, insbesondere lokal, eines leitersubstrats

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US (1) US9863056B2 (de)
EP (1) EP2855739B1 (de)
FR (1) FR2991343B1 (de)
WO (1) WO2013178959A1 (de)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102018203988B4 (de) 2018-03-15 2024-03-21 Airbus Defence and Space GmbH Werkzeugkopf zur lokalen nasschemischen Oberflächenbehandlung und Vorrichtung zur lokalen nasschemischen Behandlung, insbesondere Anodisierung

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Publication number Priority date Publication date Assignee Title
CN110079856A (zh) * 2019-04-29 2019-08-02 沈阳富创精密设备有限公司 一种流量计零件的电解抛光工装
US11352710B2 (en) * 2019-09-30 2022-06-07 Abdurrahman Ildeniz Leak free brush electroplating system
US11926916B2 (en) * 2019-11-05 2024-03-12 Wisys Technology Foundation, Inc. Color controlled metal finishing pen
US20220220628A1 (en) * 2021-01-13 2022-07-14 Corrdesa, LLC Electrochemical treatment system

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IT1017643B (it) * 1973-11-15 1977-08-10 Ebara Udylite Kk Metodo e apparecchio per tratta re soluzioni per il trattamento superficiale di metalli e liqui di di lavaggio
DE3404059A1 (de) * 1984-02-06 1985-08-08 Saafo AG, Zürich Vorrichtung zum galvanischen behandeln von werkstuecken
US5116480A (en) * 1990-03-26 1992-05-26 The Carolinch Company Method and apparatus for electrolytic plating
FR2714080B1 (fr) * 1993-12-16 1996-03-01 Dalic Dispositif pour le traitement électrochimique, notamment localisé, d'un substrat conducteur.
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Publication number Priority date Publication date Assignee Title
DE102018203988B4 (de) 2018-03-15 2024-03-21 Airbus Defence and Space GmbH Werkzeugkopf zur lokalen nasschemischen Oberflächenbehandlung und Vorrichtung zur lokalen nasschemischen Behandlung, insbesondere Anodisierung

Also Published As

Publication number Publication date
FR2991343A1 (fr) 2013-12-06
WO2013178959A1 (fr) 2013-12-05
FR2991343B1 (fr) 2014-05-16
US20150184308A1 (en) 2015-07-02
EP2855739A1 (de) 2015-04-08
US9863056B2 (en) 2018-01-09

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