EP0781857A1 - Verfahren zur Oberflächenbehandlung eines elektrischen Leiters wie eine Schiene gehörend zu einer Schienenanordnung und nach dem Verfahren hergestellte Schiene - Google Patents

Verfahren zur Oberflächenbehandlung eines elektrischen Leiters wie eine Schiene gehörend zu einer Schienenanordnung und nach dem Verfahren hergestellte Schiene Download PDF

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Publication number
EP0781857A1
EP0781857A1 EP96410120A EP96410120A EP0781857A1 EP 0781857 A1 EP0781857 A1 EP 0781857A1 EP 96410120 A EP96410120 A EP 96410120A EP 96410120 A EP96410120 A EP 96410120A EP 0781857 A1 EP0781857 A1 EP 0781857A1
Authority
EP
European Patent Office
Prior art keywords
bar
coating
connection
aluminum
tin
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
EP96410120A
Other languages
English (en)
French (fr)
Other versions
EP0781857B1 (de
Inventor
Pascal Lepretre
Daniel Mermet
Marie-Christine Andre
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0781857A1 publication Critical patent/EP0781857A1/de
Application granted granted Critical
Publication of EP0781857B1 publication Critical patent/EP0781857B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating 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
    • C25D11/026—Anodisation with spark discharge
    • 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
    • C25D11/04—Anodisation of aluminium or alloys based thereon

Definitions

  • the present invention relates to a method of treating the surface of an electrical conductor such as a bar belonging to a busbar, and to busbars capable of being obtained according to this method.
  • the electrical distribution busbar sets commonly used in low-voltage cabinets, for example for ensuring the electrical connection between one or more electrical devices such as circuit breakers and starting devices such as motors, lighting systems, etc. are made of copper.
  • these busbars are used as they are, which makes them particularly advantageous, except for a few specific applications in which they are coated with silver or tin by electrolytic means.
  • these copper busbars if they are advantageous for the reasons mentioned above, are nonetheless quite expensive. It has already been envisaged to reduce the cost price of such busbars, to use aluminum busbars. However, in contact with air, aluminum spontaneously covers itself with a layer of solid and insulating oxide, alumina.
  • the present invention solves these problems and proposes an economical method for treating the surface of a conductor such as a bar belonging to a busbar, allowing bars protected in particular against corrosion, the use of which is facilitated. for the operator, and which has improved cooling characteristics.
  • the subject of the present invention is a method of treating the surface of an electrical conductor, such as a bar, belonging to a set of bars, in particular against oxidation and / or to ensure surface properties.
  • this method being characterized in that it comprises coating at least part of the connection surface of the bar with a protective conductive metal by thermal spraying.
  • the total surface of the bar is anodized, then sandblasting located at the connection surface of said bar.
  • the invention also relates to a method for treating the surface of an electrical conductor such as a bar belonging to a busbar, in particular against oxidation, characterized in that it comprises the coating of a part at least of the connection surface of the bar with a protective conductive metal and in that prior to the deposition of the coating, anodization of the total surface of the bar is carried out followed by sandblasting located at its connection surface.
  • the aforementioned coating is treated against corrosion by a process such as microblasting or impregnation.
  • the aforementioned coating is deposited by a thermal spray with a flame, a spray with an electric arc or a spray with a plasma torch.
  • the aforementioned conductive metal is one of the metals included in the group comprising tin, silver, copper, bronze, brass, bronze-aluminum (cuproalu)
  • pigments are added to the anodization bath, the color of which is chosen so as to differ from the color of the metal coating.
  • the thickness of the oxide layer deposited during anodization is between 5 and 8 ⁇ .
  • the thickness of the metal coating is between 10 and 500 ⁇ m.
  • the bar is made of aluminum and the coating of tin.
  • the subject of the invention is also a bar of the kind previously mentioned, characterized in that it comprises a solid component M made of a conductive material such as aluminum, and comprises on its connection surface a coating of a protective metal such than silver or tin. According to another characteristic, its total surface apart from its connection zone is covered with an oxide layer of said material.
  • the invention also relates to a bar treated according to one of the methods described above, and being in the form of a profile.
  • this section has a substantially H-shaped cross section, and comprises two longitudinal blanks connected by a transverse bar, said longitudinal blanks respectively comprising two longitudinal edges folded at right angles; forming two extensions, the outer surface of which constitutes the connection area of the bar.
  • Figures 1 to 4 are perspective views of a bar belonging to a busbar, respectively corresponding to the different stages of a treatment method according to the invention.
  • the bar 1 made of aluminum has not undergone any particular treatment.
  • this same bar 1 has undergone anodization, that is to say anodic oxidation on its total surface 4.
  • This treatment consists in immersing the bar 1 in an electrolytic solution in which it is electrically connected to an anode. The current is passed from the anode to the cathode, and thus oxygen is released, which oxidizes the part on the surface. The bar 1 is completely oxidized when the current no longer passes because the alumina thus formed is insulating.
  • pigments to the bath which will be trapped during the electrolytic treatment, and whose function will be to color (for example in black, gold or bronze color) the layer of alumina 5 formed whose thickness will commonly be on the order of 5 to 8 ⁇ .
  • the contact surfaces 2 (or connection) of the bar 1 are sanded, as shown in FIG. 3.
  • This operation consists in removing the layer of alumina which has just d 'be formed on the contact surfaces 2, this in order to make these surfaces rougher and allow better adhesion of the coating which will be applied in the next step.
  • a thermal spraying of a non-oxidizable (or slightly oxidizable) material 3 is carried out on the abovementioned connection surfaces 2 (FIG. 4).
  • this projection is carried out as soon as the sanding to prevent the alumina from reforming.
  • the material used is tin.
  • this process is particularly well suited to aluminum bars of the profiled type, because the connection zone is very well located, which makes it possible to make the deposition by thermal spraying economically more advantageous than the electrolytic deposition.
  • This process therefore makes it possible to use aluminum bars 1 and to protect them with a tin coating 3, since the color of the bar 1, outside of the contact surfaces 2, is different (thanks to anodization), from that of said contact surfaces 2. It is then possible to differentiate a pure aluminum bar from a protected bar.
  • a copper or bronze coating could also be considered, although copper also has porosity and a significant corrosion tendency.
  • the use of one of these two materials would make it possible to get rid of the anodization operation, because their color is different from that of aluminum and a differentiation would then be possible.
  • the anodizing operation is however desirable since it has a certain number of advantages. Indeed, in addition to the fact that it allows a differentiation between a pure bar and a treated bar, it increases the emissivity of the bar, that is to say the capacity of the material to evacuate its heat by radiation. This increase in emissivity makes it possible to improve the cooling of the bar thanks to better infrared radiation and therefore makes it possible to transport a larger amount of current, in the same section of bar and for identical heating.
  • This layer of aluminum oxide also makes it possible to seal the bond between the coating of the surfaces. contact and the bar, and thereby limits the effects of corrosion. In addition, it allows you to change the appearance of the bar, which can be a commercial advantage.
  • thermal spraying operation may be followed by an anticorrosion treatment such as for example microbeading or impregnation (for example with paraffin).
  • an anticorrosion treatment such as for example microbeading or impregnation (for example with paraffin).
  • the bar 1, produced according to this method thus comprises a solid aluminum component M and is coated on its connection zone 2 with a non-oxidizable conductive metal 3, and on the rest of its surface with a layer of oxide of aluminum (or alumina 5).
  • the invention also includes a copper bar coated on its connection zone with a layer of tin deposited by thermal spraying.
  • the invention extends to any electrical conductor comprising the characteristics mentioned in the claims.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Coating With Molten Metal (AREA)
  • Conductive Materials (AREA)
EP19960410120 1995-12-27 1996-12-09 Verfahren zur Oberflächenbehandlung eines elektrischen Leiters wie eine Schiene gehörend zu einer Schienenanordnung und nach dem Verfahren hergestellte Schiene Expired - Lifetime EP0781857B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9515831 1995-12-27
FR9515831A FR2743205B1 (fr) 1995-12-27 1995-12-27 Procede de traitement de la surface d'un conducteur electrique tel qu'une barre appartenant a un jeu de barres et barre susceptible d'etre obtenue suivant ce procede

Publications (2)

Publication Number Publication Date
EP0781857A1 true EP0781857A1 (de) 1997-07-02
EP0781857B1 EP0781857B1 (de) 2000-05-17

Family

ID=9486227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960410120 Expired - Lifetime EP0781857B1 (de) 1995-12-27 1996-12-09 Verfahren zur Oberflächenbehandlung eines elektrischen Leiters wie eine Schiene gehörend zu einer Schienenanordnung und nach dem Verfahren hergestellte Schiene

Country Status (4)

Country Link
EP (1) EP0781857B1 (de)
DE (1) DE69608402T2 (de)
ES (1) ES2148710T3 (de)
FR (1) FR2743205B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086018A2 (de) * 2000-05-08 2001-11-15 Ami Doduco Gmbh Verfahren zum herstellen von werkstücken, welche der leitung von elektrischem strom dienen und mit einem überwiegend metallischen material beschichtet sind
FR2900353A1 (fr) * 2006-04-27 2007-11-02 Daniel Bernard Revetement conducteur electrique sur barre en aluminium anodise et son procede de fabrication associe
CN102817061A (zh) * 2012-09-07 2012-12-12 佛山市三水凤铝铝业有限公司 一种铝型材电解着色槽阴极管的清洗方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10222271A1 (de) * 2002-05-18 2003-06-26 Leoni Ag Verfahren zur Erhöhung der Widerstandsfähigkeit einer elektrischen Kontaktverbindung zwischen zwei Kontaktteilen und elektrische Kontaktverbindung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877728A (en) * 1957-02-13 1961-09-20 Bosch Gmbh Robert Improvements in or relating to the deposition on aluminium of a layer of copper, copper alloy, tin or zinc
JPS58189394A (ja) * 1982-04-28 1983-11-05 Corona Kogyo Kk 異色アルミニウム又はその合金面の加工法
US4490184A (en) * 1982-09-23 1984-12-25 Ltv Aerospace And Defense Co. Corrosion resistant thermal control material and process
EP0215950A1 (de) * 1985-02-06 1987-04-01 Fujitsu Limited Verfahren zur bildung eines komposit-aluminium-filmes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB877728A (en) * 1957-02-13 1961-09-20 Bosch Gmbh Robert Improvements in or relating to the deposition on aluminium of a layer of copper, copper alloy, tin or zinc
JPS58189394A (ja) * 1982-04-28 1983-11-05 Corona Kogyo Kk 異色アルミニウム又はその合金面の加工法
US4490184A (en) * 1982-09-23 1984-12-25 Ltv Aerospace And Defense Co. Corrosion resistant thermal control material and process
EP0215950A1 (de) * 1985-02-06 1987-04-01 Fujitsu Limited Verfahren zur bildung eines komposit-aluminium-filmes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 24 (C - 208) 2 February 1984 (1984-02-02) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086018A2 (de) * 2000-05-08 2001-11-15 Ami Doduco Gmbh Verfahren zum herstellen von werkstücken, welche der leitung von elektrischem strom dienen und mit einem überwiegend metallischen material beschichtet sind
WO2001086018A3 (de) * 2000-05-08 2002-04-18 Ami Doduco Gmbh Verfahren zum herstellen von werkstücken, welche der leitung von elektrischem strom dienen und mit einem überwiegend metallischen material beschichtet sind
FR2900353A1 (fr) * 2006-04-27 2007-11-02 Daniel Bernard Revetement conducteur electrique sur barre en aluminium anodise et son procede de fabrication associe
CN102817061A (zh) * 2012-09-07 2012-12-12 佛山市三水凤铝铝业有限公司 一种铝型材电解着色槽阴极管的清洗方法
CN102817061B (zh) * 2012-09-07 2015-12-02 佛山市三水凤铝铝业有限公司 一种铝型材电解着色槽阴极管的清洗方法

Also Published As

Publication number Publication date
FR2743205B1 (fr) 1998-02-06
DE69608402T2 (de) 2001-08-23
DE69608402D1 (de) 2000-06-21
FR2743205A1 (fr) 1997-07-04
ES2148710T3 (es) 2000-10-16
EP0781857B1 (de) 2000-05-17

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