EP1693857A1 - Electrical lead wire with aluminium or aluminium alloy core - Google Patents

Electrical lead wire with aluminium or aluminium alloy core Download PDF

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Publication number
EP1693857A1
EP1693857A1 EP06300106A EP06300106A EP1693857A1 EP 1693857 A1 EP1693857 A1 EP 1693857A1 EP 06300106 A EP06300106 A EP 06300106A EP 06300106 A EP06300106 A EP 06300106A EP 1693857 A1 EP1693857 A1 EP 1693857A1
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EP
European Patent Office
Prior art keywords
coating layer
tin
alloy
core
zinc
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.)
Withdrawn
Application number
EP06300106A
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German (de)
French (fr)
Inventor
Christophe Brismalein
Francis Debladis
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.)
Nexans SA
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Nexans SA
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Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Publication of EP1693857A1 publication Critical patent/EP1693857A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium

Definitions

  • the invention relates to an electric wire comprising a core of aluminum or aluminum alloy.
  • alumina formation occurs around the wire by oxidation in the air.
  • alumina is electrically resistant and consequently leads to an increase in the electrical contact resistance, which can create a break in the contact, in the case of low currents, or heating in the case of strong currents.
  • the object of the invention is to avoid this formation of a layer of alumina around the electrical wire, by coating the wire with a material that does not have these insulating properties detrimental to the proper electrical operation of the conductor.
  • Tin is less electronegative than aluminum and protects it poorly in case of galvanic corrosion.
  • the invention proposes an electric wire comprising an aluminum or aluminum alloy core provided with a metal coating layer, characterized in that said coating layer is made of tin and zinc alloy, said coating layer (3) being deposited on the core (2) by electrodeposition.
  • the deposition of this alloy by electrodeposition is more controllable as to the quality and the thickness of the layer than a deposition by hot dipping. Moreover, it is a reproducible process.
  • said alloy of tin and zinc is a codeposit on said core, that is to say that the tin and the zinc are alloyed during their deposit on the aluminum core or of aluminum alloy.
  • said alloy has a tin content by weight of between 60 and 80%.
  • said alloy has a zinc content by weight of between 20 and 40%.
  • said alloy comprises a tin content by weight substantially equal to 70% and a weight ratio of zinc substantially equal to 30%.
  • the thickness of said coating layer may be between 0.5 ⁇ m and 10 ⁇ m.
  • the invention also relates to a multi-stranded electrical conductor made by assembling a plurality of wires as specified above.
  • the invention relates to a single strand electrical conductor consisting of a wire as specified above.
  • Figure 1 is a cross-sectional view of a wire according to the invention.
  • Figure 2 is a perspective view of an electrical conductor consisting of son according to the invention.
  • an electric wire 1 comprises a core 2 made of aluminum or aluminum alloy provided with a layer of coating 3 made of tin and zinc alloy, preferably a codode of tin and zinc.
  • the alloy comprises a weight content of tin of between 60 and 80% and a zinc content by weight of between 20 and 40%.
  • the alloy comprises a weight ratio of tin substantially equal to 70% and a zinc content by weight substantially equal to 30%.
  • the thickness of the coating layer 3 is between 0.5 ⁇ m and 10 ⁇ m.
  • An electric wire according to the invention is manufactured by wire drawing.
  • the coating layer 3 is electrodeposited on a core to an intermediate state and then the entire core and the coating layer is drawn to the final diameter.
  • the invention is preferably applied to aluminum or aluminum alloy wires having a diameter of between 0.08 and 12 mm., In the finished state after drawing
  • the son 1 thus obtained can be assembled and stranded to form a multi-strand electric cable as shown in FIG.
  • the invention also applies to large diameter wires that can produce a single-stranded conductor.

Abstract

The wire (1) has a core (2) provided with a metallic coating layer (3). The coating layer is made of tin or zinc alloy. The thickness of the coating layer is between 0.5 and 10 micrometers. The coating layer is deposited on the core by electrodeposition during which tin and zinc are alloyed. The coating layer does not present prejudicial insulating properties with a better electric operation of a conductor. Independent claims are also included for the following: (1) a multistranded electrical conductor formed by assembling a set of electric wires (2) a monostranded electrical conductor constituted of an electric wire.

Description

L'invention concerne un fil électrique comportant une âme en aluminium ou alliage d'aluminium.The invention relates to an electric wire comprising a core of aluminum or aluminum alloy.

Lors de sertissage d'un fil en aluminium ou alliage d'aluminium dans un manchon de sertissage, compte-tenu de la différence des coefficients de dilatation thermique de l'aluminium et du métal constituant le manchon de sertissage, souvent en alliage de cuivre, il se produit des formations d'alumine autour du fil par oxydation à l'air. Or, l'alumine est électriquement résistant et entraîne en conséquence une augmentation de la résistance électrique de contact, qui peut créer une rupture du contact, dans le cas de faibles courants, ou un échauffement, dans le cas de forts courants.When crimping an aluminum or aluminum alloy wire in a crimping sleeve, taking into account the difference in the thermal expansion coefficients of aluminum and the metal constituting the crimping sleeve, often made of copper alloy, alumina formation occurs around the wire by oxidation in the air. However, alumina is electrically resistant and consequently leads to an increase in the electrical contact resistance, which can create a break in the contact, in the case of low currents, or heating in the case of strong currents.

Le but de l'invention est d'éviter cette formation d'une couche d'alumine autour du fil électrique, par revêtement du fil par un matériau qui ne présente pas ces propriétés isolantes préjudiciables au bon fonctionnement électrique du conducteur.The object of the invention is to avoid this formation of a layer of alumina around the electrical wire, by coating the wire with a material that does not have these insulating properties detrimental to the proper electrical operation of the conductor.

Il est divulgué dans le document de brevet GB 790 015 qu'il est connu de réaliser un fil électrique avec une âme en aluminium ou alliage d'aluminium pourvu d'une couche de revêtement en étain.It is disclosed in GB 790 015 that it is known to make an electrical wire with an aluminum or aluminum alloy core provided with a tin coating layer.

Cependant, cette solution pose le problème suivant.However, this solution poses the following problem.

L'étain est moins électronégatif que l'aluminium et protège mal ce dernier en cas de corrosion galvanique.Tin is less electronegative than aluminum and protects it poorly in case of galvanic corrosion.

Enfin, les revêtements d'étain pur sont suceptibles de développer des filaments dans certaines conditions.Finally, pure tin coatings are likely to develop filaments under certain conditions.

Pour résoudre ce problème, l'invention propose un fil électrique comportant une âme en aluminium ou alliage d'aluminium pourvue d'une couche de revêtement métallique, caractérisé en ce que ladite couche de revêtement est en alliage d'étain et de zinc, ladite couche de revêtement (3) étant déposée sur le noyau (2) par électrodéposition.To solve this problem, the invention proposes an electric wire comprising an aluminum or aluminum alloy core provided with a metal coating layer, characterized in that said coating layer is made of tin and zinc alloy, said coating layer (3) being deposited on the core (2) by electrodeposition.

Le dépôt de cet alliage par électrodéposition est plus contrôlable quant à la qualité et l'épaisseur de la couche qu'un dépôt par trempé à chaud. De plus, c'est un processus reproductible.The deposition of this alloy by electrodeposition is more controllable as to the quality and the thickness of the layer than a deposition by hot dipping. Moreover, it is a reproducible process.

Selon un mode de réalisation préféré, ledit alliage d'étain et de zinc est un codépôt sur ladite âme, c'est-à-dire que l'étain et le zinc sont alliés lors de leur dépôt sur l'âme d'aluminium ou d'alliage d'aluminium.According to a preferred embodiment, said alloy of tin and zinc is a codeposit on said core, that is to say that the tin and the zinc are alloyed during their deposit on the aluminum core or of aluminum alloy.

De préférence, ledit alliage comporte un taux en poids d'étain compris entre 60 et 80%.Preferably, said alloy has a tin content by weight of between 60 and 80%.

De préférence, ledit alliage comporte un taux en poids de zinc compris entre 20 et 40%.Preferably, said alloy has a zinc content by weight of between 20 and 40%.

Avantageusement, ledit alliage comporte un taux en poids d'étain sensiblement égal à 70% et un taux en poids de zinc sensiblement égal à 30%.Advantageously, said alloy comprises a tin content by weight substantially equal to 70% and a weight ratio of zinc substantially equal to 30%.

L'épaisseur de ladite couche de revêtement peut être comprise entre 0,5µm et 10 µm.The thickness of said coating layer may be between 0.5 μm and 10 μm.

L'invention concerne également un conducteur électrique multibrin réalisé par assemblage d'une pluralité de fils tels que précisés ci-dessus.The invention also relates to a multi-stranded electrical conductor made by assembling a plurality of wires as specified above.

L'invention concerne enfin un conducteur électrique monobrin constitué d'un fil tel que précisé ci-dessus.Finally, the invention relates to a single strand electrical conductor consisting of a wire as specified above.

L'invention est décrite ci-après plus en détail à l'aide de figures ne représentant qu'un mode de réalisation préféré de l'invention.The invention is described below in more detail with the aid of figures representing only a preferred embodiment of the invention.

La figure 1 est une vue en coupe transversale d'un fil conforme à l'invention.Figure 1 is a cross-sectional view of a wire according to the invention.

La figure 2 est une vue en perspective d'un conducteur électrique constitué de fils conformes à l'invention.Figure 2 is a perspective view of an electrical conductor consisting of son according to the invention.

Comme visible sur la figure 1, un fil électrique 1 comporte une âme 2 en aluminium ou alliage d'aluminium pourvue d'une couche de revêtement 3 en alliage d'étain et de zinc, de préférence un codépôt d'étain et de zinc.As can be seen in FIG. 1, an electric wire 1 comprises a core 2 made of aluminum or aluminum alloy provided with a layer of coating 3 made of tin and zinc alloy, preferably a codode of tin and zinc.

Selon l'invention, l'alliage comporte un taux en poids d'étain compris entre 60 et 80% et un taux en poids de zinc compris entre 20 et 40%.According to the invention, the alloy comprises a weight content of tin of between 60 and 80% and a zinc content by weight of between 20 and 40%.

Selon un mode de réalisation particulier, l'alliage comporte un taux en poids d'étain sensiblement égal à 70% et un taux en poids de zinc sensiblement égal à 30%.According to a particular embodiment, the alloy comprises a weight ratio of tin substantially equal to 70% and a zinc content by weight substantially equal to 30%.

L'épaisseur de la couche de revêtement 3 est comprise entre 0,5 µm et 10 µm.The thickness of the coating layer 3 is between 0.5 μm and 10 μm.

Un fil électrique conforme à l'invention est fabriqué par tréfilage. La couche de revêtement 3 est disposée par électrodéposition sur une âme à un état intermédiaire puis l'ensemble de l'âme et de la couche de revêtement est tréfilée au diamètre final.An electric wire according to the invention is manufactured by wire drawing. The coating layer 3 is electrodeposited on a core to an intermediate state and then the entire core and the coating layer is drawn to the final diameter.

L'invention s'applique de préférence à des fils en aluminium ou alliage d'aluminium ayant un diamètre compris entre 0,08 et 12 mm., à l'état fini après tréfilageThe invention is preferably applied to aluminum or aluminum alloy wires having a diameter of between 0.08 and 12 mm., In the finished state after drawing

Les fils 1 ainsi obtenus peuvent être assemblés et toronnés pour former un câble électrique multibrin tel que représenté sur la figure 2.The son 1 thus obtained can be assembled and stranded to form a multi-strand electric cable as shown in FIG.

L'invention s'applique également à des fils de diamètre important pouvant réaliser un conducteur monobrin.The invention also applies to large diameter wires that can produce a single-stranded conductor.

Claims (8)

Fil électrique (1) comportant une âme (2) en aluminium ou alliage d'aluminium pourvue d'une couche de revêtement (3) métallique, caractérisé en ce que ladite couche de revêtement est en alliage d'étain et de zinc, ladite couche de revêtement (3) étant déposée sur le noyau (2) par électrodéposition.Electrical wire (1) comprising a core (2) made of aluminum or aluminum alloy provided with a metal coating layer (3), characterized in that said coating layer is made of tin and zinc alloy, said layer coating (3) being deposited on the core (2) by electroplating. Fil électrique selon la revendication 1, caractérisé en ce que ledit alliage d'étain et de zinc est un codépôt sur ladite âme.Electrical wire according to claim 1, characterized in that said alloy of tin and zinc is a codeposit on said core. Fil électrique selon la revendication 1 ou 2, caractérisé en ce que ledit alliage comporte un taux en poids d'étain compris entre 60 et 80%.Electrical wire according to claim 1 or 2, characterized in that said alloy has a weight ratio of tin of between 60 and 80%. Fil électrique selon l'une des revendications précédentes, caractérisé en ce que ledit alliage comporte un taux en poids de zinc compris entre 20 et 40%.Electrical wire according to one of the preceding claims, characterized in that said alloy has a zinc content by weight of between 20 and 40%. Fil électrique selon les revendications 3 et 4, caractérisé en ce que ledit alliage comporte un taux en poids d'étain sensiblement égal à 70% et un taux en poids de zinc sensiblement égal à 30%.Electrical wire according to claims 3 and 4, characterized in that said alloy comprises a weight ratio of tin substantially equal to 70% and a zinc content by weight substantially equal to 30%. Fil électrique selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur de ladite couche de revêtement (3) est comprise entre 0,5 µm et 10 µm.Electrical wire according to one of the preceding claims, characterized in that the thickness of said coating layer (3) is between 0.5 microns and 10 microns. Conducteur électrique multibrin réalisé par assemblage d'une pluralité de conducteurs selon l'une des revendications précédentes.Multi-stranded electrical conductor made by assembling a plurality of conductors according to one of the preceding claims. Conducteur électrique monobrin constitué d'un fil selon l'une des revendications 1 à 6.Single conductor electric conductor consisting of a wire according to one of claims 1 to 6.
EP06300106A 2005-02-10 2006-02-03 Electrical lead wire with aluminium or aluminium alloy core Withdrawn EP1693857A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0550398A FR2881870B1 (en) 2005-02-10 2005-02-10 ELECTRIC WIRE WITH ALUMINUM OR ALUMINUM ALLOY

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EP1693857A1 true EP1693857A1 (en) 2006-08-23

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EP06300106A Withdrawn EP1693857A1 (en) 2005-02-10 2006-02-03 Electrical lead wire with aluminium or aluminium alloy core

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EP (1) EP1693857A1 (en)
FR (1) FR2881870B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017178734A1 (en) 2016-04-11 2017-10-19 Nexans Electrical cable with improved resistance to galvanic corrosion

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009009557A1 (en) * 2009-02-19 2010-09-02 W.C. Heraeus Gmbh Electrically conductive materials, leads and cables for stimulation electrodes
DE102009009558B4 (en) * 2009-02-19 2013-08-29 Heraeus Precious Metals Gmbh & Co. Kg Wound tape as electrical conductor for stimulation electrodes
CN202955104U (en) * 2012-10-22 2013-05-29 株式会社岛野 Control inhaul cable for bicycle
DE102014108347A1 (en) * 2014-06-13 2015-12-17 Leoni Bordnetz-Systeme Gmbh Electric stranded conductor and method for producing a stranded electrical conductor
WO2020189689A1 (en) * 2019-03-20 2020-09-24 住友電気工業株式会社 Aluminum-based wire material

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB790015A (en) 1955-09-09 1958-01-29 Ici Ltd Coated wire
JPH07102356A (en) * 1993-10-01 1995-04-18 Furukawa Electric Co Ltd:The Conductor for electric and electronic equipment and production thereof
US5601695A (en) * 1995-06-07 1997-02-11 Atotech U.S.A., Inc. Etchant for aluminum alloys

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US2638521A (en) * 1952-01-25 1953-05-12 Cons Edison Co New York Inc Contact for electrical conductors of aluminum or aluminum alloys
US3814621A (en) * 1969-10-24 1974-06-04 Dynamics Corp Massa Div Methods of and means for coating articles employing sonic energy
LU72235A1 (en) * 1975-04-07 1977-03-18
US4169770A (en) * 1978-02-21 1979-10-02 Alcan Research And Development Limited Electroplating aluminum articles
US4963237A (en) * 1989-05-08 1990-10-16 Olds Robert S Method for electrochemical activation of IVD aluminum coatings
JP3878978B2 (en) * 2002-10-24 2007-02-07 コーア株式会社 Lead-free solder and lead-free fittings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB790015A (en) 1955-09-09 1958-01-29 Ici Ltd Coated wire
FR1156681A (en) * 1955-09-09 1958-05-20 Ici Ltd Coated metal wire
JPH07102356A (en) * 1993-10-01 1995-04-18 Furukawa Electric Co Ltd:The Conductor for electric and electronic equipment and production thereof
US5601695A (en) * 1995-06-07 1997-02-11 Atotech U.S.A., Inc. Etchant for aluminum alloys

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 07 31 August 1995 (1995-08-31) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017178734A1 (en) 2016-04-11 2017-10-19 Nexans Electrical cable with improved resistance to galvanic corrosion

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FR2881870A1 (en) 2006-08-11
US20060283621A1 (en) 2006-12-21
FR2881870B1 (en) 2011-10-21

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