WO2003100132A1 - Coated wire and method of producing the same - Google Patents

Coated wire and method of producing the same Download PDF

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Publication number
WO2003100132A1
WO2003100132A1 PCT/EP2003/050177 EP0350177W WO03100132A1 WO 2003100132 A1 WO2003100132 A1 WO 2003100132A1 EP 0350177 W EP0350177 W EP 0350177W WO 03100132 A1 WO03100132 A1 WO 03100132A1
Authority
WO
WIPO (PCT)
Prior art keywords
coated wire
zinc alloy
alloy layer
polyolefin based
wire according
Prior art date
Application number
PCT/EP2003/050177
Other languages
French (fr)
Inventor
Nico Fourneau
Danny Gonnissen
Original Assignee
N.V. Bekaert S.A.
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 N.V. Bekaert S.A. filed Critical N.V. Bekaert S.A.
Priority to AU2003238078A priority Critical patent/AU2003238078A1/en
Priority to EP03735710A priority patent/EP1537256A1/en
Publication of WO2003100132A1 publication Critical patent/WO2003100132A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/024—Covers or coatings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/10—Metallic substrate based on Fe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/60—Adding a layer before coating
    • B05D2350/65—Adding a layer before coating metal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2507/00—Polyolefins

Definitions

  • the invention relates to a coated wire and to a. method of manufacturing a coated wire.
  • Such type of wire has to be characterised by a uniform color, it has to keep its beautiful appearance over a long period of time and at the same time it has to be characterised by a good corrosion resistance.
  • a method known in the art comprises the application of a zinc coating followed by the application of a polymer coating, generally applied on a cold metal surface after a prior treatment of chemical conversion, for example a chromate conversion.
  • a coated wire comprises : a steel core; a zinc alloy coating, said zinc alloy comprises at least 2 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn; a polyolefin based polymer coating.
  • the zinc alloy layer comprises a porous structure allowing the polyolefin based coating to penetrate into the pores of this porous structure. In this way a mechanical anchoring of the polyolefin based polymer coating in the zinc alloy layer is obtained.
  • the pores can for example be obtained by the presence of an element such as Fe, Al, Ni, Mn, Sn in the zinc lattice as the presence of such a foreign element is disturbing the zinc lattice.
  • a great advantage of the coated wire according to the present invention is that a good adhesion of the polyolefin based coating can be obtained without using adhesion promoting agents, such as toxic chromium components or the more expensive Ti and/or Zr salts.
  • the composition of the zinc alloy may be homogeneous throughout the whole thickness of the zinc alloy coating.
  • the outer surface of the zinc alloy coating comprises at least traces of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn.
  • the zinc alloy layer has at its outer surface a lamellar structure allowing the polyolefin based coating to penetrate in the pores created between neighboring lamellas.
  • the invention is applicable to steel wires as core.
  • the steel wires may be chosen within a high diameter range. Either steel wires with a low or a high carbon content can be considered.
  • the steel wires can have any cross-section such as round, square, rectangular, oval or half oval cross-sections.
  • the zinc alloy layer has a thickness ranging preferably between 1 and
  • zinc alloy layer one can consider for example zinc alloys comprising at least 2 wt% of an element selected from the group consisting of Fe,
  • the zinc alloy layer comprises more than 3 wt% or even more than 5 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn.
  • a first group of zinc alloys comprises Zn-Fe alloys.
  • the Zn-Fe alloy coating can be applied by any technique known in the art, as for example by electrolysis, by the deposition of a Fe-Zn salt, by hot dip, ...
  • a gradient of the iron throughout the thickness of the coating layer may be observed. This gradient is for example due to the diffusion of iron, for example of the steel into the coating layer, as for example a Zn coating layer or a Zn-Fe coating layer.
  • a second group of zinc alloys comprises Zn-AI alloys.
  • a preferred Zn-AI alloy comprises between 2 and 15 % Al. Possibly, the Zn-AI alloy comprises a rare earth element such as Ce and/or La.
  • zinc alloys comprise comprise Zn-Ni alloys, Zn-Mn alloys or Zn-Sn alloys.
  • polyolefin based polymer coating is meant a polymer coating comprising at least one olefin as monomer.
  • polyolefin based polymer coatings are high or low density polyethylene, polypropylene and polyethylene/polypropylene copolymers.
  • the polyolefin based polymer coating may further comprise a polyacrylate.
  • the polyolefin based polymer coating preferably has a thickness between 0.1 and 5 ⁇ m, for example between 0.5 and 2 ⁇ m
  • stabilizers or other additives can be added to the polyolefin based polymer coating.
  • colored wires By adding a coloring pigment to the polyolefin based polymer coating colored wires can be obtained. In this way colored wires pertaining to the whole visible spectrum, from violet till red can be obtained.
  • the colored wire according to the present invention can be used for any kind of application whereby a wire with an improved corrosion resistance and/or a colored wire is desired.
  • the colored wires can for example be used for decoration, anti-corrosion and identification application.
  • Examples where a decorative aspect is desired are for example wires for handles of buckets or pails, wires for the closing of bottles or jars, coat hanger wire.
  • Colored wires according to the present invention can be used for fences since they are giving a nice decorative aspect and at the same time an improved corrosion resistance. They can for example be used as barbed wire, for knotted fences, for welded fences, ... Structures comprising a number of colored wires according to the present invention are described below.
  • a further application of the colored wire according to the present invention is for the manufacturing of springs.
  • the colored wires are suitable for al kind of identification purposes, for example for filament identification in cables, for identification of springs or for applications where the visibility of the wire is important, such as vineyard wire.
  • a colored wire according to the present invention comprises no toxic compounds as for example chromium compounds, it is food approved and can thus be used in the food industry, for example as handles of buckets or pails, as wires for the closing of bottles or jars or as champagne cork wire.
  • a spring comprising a coated wire according to the invention is provided.
  • a structure comprising a number of colored wires as described above is provided.
  • the structure may for example comprise a welded, woven or braided structure.
  • Wires according to the present invention can be used in reinforcing structures for buildings such as wire beads for reinforcing internal or external corners of a wall or for reinforcing window or door openings. Such wire beads are sold by the applicant under the trademark WIDRA ® . According to a fourth aspect of the invention a method of manufacturing a colored wire is provided.
  • This method comprises the steps of providing a steel core; applying a zinc alloy layer comprising at least 2 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn on said steel core; applying a polyolefin based polymer coating on said zinc alloy layer.
  • the colored wire according to the present invention can be manufactured in a continuous, in line process. By using this continuous process, the manufacturing costs of the colored wire are considerably reduced. This is a great advantage over the processes known in the art.
  • the zinc alloy layer can be applied by any conventional technique, for example by hot dip, electrolysis or cladding.
  • the zinc or zinc alloy coated wire is subjected to a thermal treatment.
  • the polyolefin based coating can be applied by any technique known in the art.
  • a preferred technique is extrusion.
  • the polyolefin based coating can also be applied by dipping or spraying. Possibly, the application of the polyolefin based coating is followed by a drying or curing step.
  • the coated steel core Before the polyolefin based coating is applied, the coated steel core may be cooled. Alternatively, the polyolefin based coating is applied on a hot metal surface.
  • FIGURE 1 shows the cross-section of a colored wire according to the present invention.
  • FIGURE 1 represents a transversal cross-section of a coated wire 10 according to the invention.
  • the steel wire 10 comprises a steel core 12, a Zn-Fe alloy coating layer 14 applied on the steel core and a polyethylene based coating layer 16 applied on top of the zinc alloy layer.
  • a steel wire according to the invention can be manufactured as follows : Starting material is a low carbon wire rod with a diameter of about 5.5 mm. This wire rod is drawn either to an intermediate diameter or to the final diameter. Subsequently, the drawn wire is subjected to a heat treatment and at this intermediate or final diameter a zinc alloy coating is applied.
  • the coated wire can be further drawn to its final diameter in case of an intermediate drawing step.
  • the Zn-Fe coating layer has for example a thickness of 20 ⁇ m.
  • the Zn-Fe coating layer comprises 8 wt% Fe.
  • Zn-Fe coating layer comprises 5 wt% Fe.
  • a polyethylene based polymer coating comprising at least one coloring agent is applied.
  • the polyethylene base polymer coating is thereby penetrating in the pores located at the outer surface of the zinc alloy layer.
  • the above described colored wire is characterised by a long lasting shiny aspect.
  • wires are subjected to a corrosion test (DIN50021 NSS (neutral salt spray test)).
  • the corrosion resistance is evaluated by determining the relative corrosion performance of a wire.
  • the relative corrosion performance is defined as : number of hours to obtain 5 % dark brown rust (DBR) weight of the coating layer in g/ m 2
  • Table 1 shows the relative corrosion performance of a wire with a Zn-Fe coating alloy with and without a polyethylene coating and the relative corrosion performance of a wire with a Zn-AI with and without a polyethylene coating.

Abstract

The invention relates to a coated wire comprising: - a steel core; - a zinc alloy layer, said zinc alloy layer comprises at least 2 wt % of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn; - a polyolefin based polymer coating. The zinc alloy layer comprises pores allowing the penetration of the polyolefin based polymer coating. The invention further relates to a method of manufacturing a coated wire.

Description

COATED IRE AND ETHOD OF PRODUCING THE SAME
Field of the invention. the invention relates to a coated wire and to a. method of manufacturing a coated wire.
Background of the invention.
The application of a zinc coating to protect steel against corrosion is widely known.
At present, there is a high demand in the market for colored wire. Such type of wire has to be characterised by a uniform color, it has to keep its beautiful appearance over a long period of time and at the same time it has to be characterised by a good corrosion resistance.
A number of attempts have already been made to obtain a colored wire with a good corrosion resistance.
A method known in the art comprises the application of a zinc coating followed by the application of a polymer coating, generally applied on a cold metal surface after a prior treatment of chemical conversion, for example a chromate conversion.
However, since chromium is a toxic component, high efforts are made to avoid its use.
Nowadays one tries to replace chromium with other adhesion promoting agents such as Ti and/or Zr salts. These alternatives are however expensive and up to now the performance of these adhesion promoting agents is not satisfactory.
Summary of the invention.
It is an object of the present invention to provide wires with a long lasting shining aspect and a good corrosion resistance.
It is another object to provide steel wires in a variety of colors.
It is a further object to provide a method of manufacturing colored wire in an environment friendly way thereby avoiding the use of chromium compounds or other adhesion promoting agents. According to a first aspect of the present invention, a coated wire is provided. This coated wire comprises : a steel core; a zinc alloy coating, said zinc alloy comprises at least 2 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn; a polyolefin based polymer coating.
With "2 wt%" is meant that, supposed that the total weight of the zinc alloy coating is equal to y grams, the weight of the element selected y - 2 from the group consisting of Fe, Al, Ni, Mn and Sn is at least - —
grams.
As mentioned above a polymer coating applied on a zinc coating known in the art presents a very poor adhesion. To obtain a good adhesion, a chemical conversion process, for example a chromate conversion process, is necessary.
According to the present invention, the zinc alloy layer comprises a porous structure allowing the polyolefin based coating to penetrate into the pores of this porous structure. In this way a mechanical anchoring of the polyolefin based polymer coating in the zinc alloy layer is obtained.
The pores can for example be obtained by the presence of an element such as Fe, Al, Ni, Mn, Sn in the zinc lattice as the presence of such a foreign element is disturbing the zinc lattice.
A great advantage of the coated wire according to the present invention is that a good adhesion of the polyolefin based coating can be obtained without using adhesion promoting agents, such as toxic chromium components or the more expensive Ti and/or Zr salts.
The composition of the zinc alloy may be homogeneous throughout the whole thickness of the zinc alloy coating.
Alternatively, a gradient of the concentration of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn is observed, the concentration of such an element being higher close to the surface of the steel core compared to the concentration of such an element at the outer surface of the zinc alloy coating.
In case a gradient of the concentration of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn is observed, it is preferred that the outer surface of the zinc alloy coating comprises at least traces of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn.
In a preferred embodiment the zinc alloy layer has at its outer surface a lamellar structure allowing the polyolefin based coating to penetrate in the pores created between neighboring lamellas.
The invention is applicable to steel wires as core. The steel wires may be chosen within a high diameter range. Either steel wires with a low or a high carbon content can be considered.
The steel wires can have any cross-section such as round, square, rectangular, oval or half oval cross-sections.
The zinc alloy layer has a thickness ranging preferably between 1 and
100 μm and more preferably between 1 and 50 μm, for example 5 or 20 μm.
As zinc alloy layer one can consider for example zinc alloys comprising at least 2 wt% of an element selected from the group consisting of Fe,
Al, Ni, Mn and Sn. More preferably, the zinc alloy layer comprises more than 3 wt% or even more than 5 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn.
A first group of zinc alloys comprises Zn-Fe alloys.
The Zn-Fe alloy coating can be applied by any technique known in the art, as for example by electrolysis, by the deposition of a Fe-Zn salt, by hot dip, ... A gradient of the iron throughout the thickness of the coating layer may be observed. This gradient is for example due to the diffusion of iron, for example of the steel into the coating layer, as for example a Zn coating layer or a Zn-Fe coating layer.
A second group of zinc alloys comprises Zn-AI alloys. A preferred Zn-AI alloy comprises between 2 and 15 % Al. Possibly, the Zn-AI alloy comprises a rare earth element such as Ce and/or La.
Other zinc alloys comprise comprise Zn-Ni alloys, Zn-Mn alloys or Zn-Sn alloys.
With polyolefin based polymer coating is meant a polymer coating comprising at least one olefin as monomer. Examples of polyolefin based polymer coatings are high or low density polyethylene, polypropylene and polyethylene/polypropylene copolymers.
The polyolefin based polymer coating may further comprise a polyacrylate.
The polyolefin based polymer coating preferably has a thickness between 0.1 and 5 μm, for example between 0.5 and 2 μm
Possibly, stabilizers or other additives can be added to the polyolefin based polymer coating.
By adding a coloring pigment to the polyolefin based polymer coating colored wires can be obtained. In this way colored wires pertaining to the whole visible spectrum, from violet till red can be obtained.
The colored wire according to the present invention can be used for any kind of application whereby a wire with an improved corrosion resistance and/or a colored wire is desired. The colored wires can for example be used for decoration, anti-corrosion and identification application.
Examples where a decorative aspect is desired are for example wires for handles of buckets or pails, wires for the closing of bottles or jars, coat hanger wire.
Colored wires according to the present invention can be used for fences since they are giving a nice decorative aspect and at the same time an improved corrosion resistance. They can for example be used as barbed wire, for knotted fences, for welded fences, ... Structures comprising a number of colored wires according to the present invention are described below.
A further application of the colored wire according to the present invention is for the manufacturing of springs.
Furthermore, the colored wires are suitable for al kind of identification purposes, for example for filament identification in cables, for identification of springs or for applications where the visibility of the wire is important, such as vineyard wire.
As a colored wire according to the present invention comprises no toxic compounds as for example chromium compounds, it is food approved and can thus be used in the food industry, for example as handles of buckets or pails, as wires for the closing of bottles or jars or as champagne cork wire.
According to a second aspect of the invention a spring comprising a coated wire according to the invention is provided.
According to a third aspect of the invention a structure comprising a number of colored wires as described above is provided. The structure may for example comprise a welded, woven or braided structure.
Wires according to the present invention can be used in reinforcing structures for buildings such as wire beads for reinforcing internal or external corners of a wall or for reinforcing window or door openings. Such wire beads are sold by the applicant under the trademark WIDRA®. According to a fourth aspect of the invention a method of manufacturing a colored wire is provided.
This method comprises the steps of providing a steel core; applying a zinc alloy layer comprising at least 2 wt% of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn on said steel core; applying a polyolefin based polymer coating on said zinc alloy layer.
The colored wire according to the present invention can be manufactured in a continuous, in line process. By using this continuous process, the manufacturing costs of the colored wire are considerably reduced. This is a great advantage over the processes known in the art.
The zinc alloy layer can be applied by any conventional technique, for example by hot dip, electrolysis or cladding.
Possibly, the zinc or zinc alloy coated wire is subjected to a thermal treatment.
The polyolefin based coating can be applied by any technique known in the art. A preferred technique is extrusion.
The polyolefin based coating can also be applied by dipping or spraying. Possibly, the application of the polyolefin based coating is followed by a drying or curing step.
Before the polyolefin based coating is applied, the coated steel core may be cooled. Alternatively, the polyolefin based coating is applied on a hot metal surface.
Brief description of the drawings.
The invention will now be described into more detail with reference to the accompanying drawing wherein FIGURE 1 shows the cross-section of a colored wire according to the present invention.
Description of the preferred embodiments of the invention.
FIGURE 1 represents a transversal cross-section of a coated wire 10 according to the invention. The steel wire 10 comprises a steel core 12, a Zn-Fe alloy coating layer 14 applied on the steel core and a polyethylene based coating layer 16 applied on top of the zinc alloy layer.
A steel wire according to the invention can be manufactured as follows : Starting material is a low carbon wire rod with a diameter of about 5.5 mm. This wire rod is drawn either to an intermediate diameter or to the final diameter. Subsequently, the drawn wire is subjected to a heat treatment and at this intermediate or final diameter a zinc alloy coating is applied.
The coated wire can be further drawn to its final diameter in case of an intermediate drawing step. The Zn-Fe coating layer has for example a thickness of 20 μm. The Zn-Fe coating layer comprises 8 wt% Fe. The outer surface of the
Zn-Fe coating layer comprises 5 wt% Fe.
Subsequently, a polyethylene based polymer coating comprising at least one coloring agent is applied. The polyethylene base polymer coating is thereby penetrating in the pores located at the outer surface of the zinc alloy layer.
The above described colored wire is characterised by a long lasting shiny aspect.
To evaluate the corrosion resistance of the wires according to the present invention, wires are subjected to a corrosion test (DIN50021 NSS (neutral salt spray test)). The corrosion resistance is evaluated by determining the relative corrosion performance of a wire. The relative corrosion performance is defined as : number of hours to obtain 5 % dark brown rust (DBR) weight of the coating layer in g/ m2
Table 1 shows the relative corrosion performance of a wire with a Zn-Fe coating alloy with and without a polyethylene coating and the relative corrosion performance of a wire with a Zn-AI with and without a polyethylene coating.
It is clear from table 1 that the relative corrosion performance of a wire according to the present invention, i.e. a wire coated with a polyolefin based coating, is higher than the relative corrosion performance of a wire coated with a zinc alloy.
Table 1
Figure imgf000010_0001

Claims

1. A coated wire comprising a steel core; - a zinc alloy layer, said zinc alloy layer comprises at least 2 wt % of an element selected from the group consisting of Fe, Al, Ni, Mn and
Sn; a polyolefin based polymer coating; characterized in that said zinc alloy layer comprises pores and that said polyolefin based polymer coating is penetrating in said pores of said zinc alloy layer.
2. A coated wire according to claim 1 , whereby adhesion between said zinc alloy layer and said polyolefin based polymer coating is obtained without using an adhesion promoting agent.
3. A coated wire according to claim 1 or 2, whereby said zinc alloy layer comprises at its outer surface at least one of the elements Fe, Al, Ni, Mn or Sn.
4. A coated wire according to any one of the preceding claims, whereby said zinc alloy layer has its outer surface a lamellar structure and whereby said polyolefin based coating is penetrating between the pores created between neighboring lamellas.
5. A coated wire according to any one of the preceding claims, whereby said polyolefin based polymer coating further comprises a polyacrylate.
6. A coated wire according to any one of the preceding claims, whereby said polyolefin based polymer coating comprises polyethylene.
7. A coated wire according to any one of the preceding claims, whereby said polyolefin based polymer coating comprises polypropylene
8. A coated wire according to any one of claims 1 to 6, whereby said polyolefin based coating comprises at least one coloring agent.
9. A coated wire according to any one of the preceding claims, whereby said zinc alloy layer comprises a Zn-Fe alloy, a Zn-AI alloy, a Zn-Ni alloy, a Zn-Mn alloy or a Zn-Sn alloy.
10. A coated wire according to any one of the preceding claims, whereby said zinc alloy layer comprises between 2 and 15 % Al and possibly a rare earth element.
1 1. A coated wire according to any one of the preceding claims, whereby said polyolefin based polymer coating has a thickness ranging between 0.1 and 5 μm.
12. A spring made from a coated wire according to any one of claims 1 to 11.
13. A structure comprising a number of colored wires according to any one of claims 1 to 11.
14. A structure according to claim 13, whereby said structure comprises a welded, woven or braided structure.
15. A method of manufacturing a coated wire according to any one of claims 1 to 1 1 , said method comprising the steps of providing a steel core; - applying a zinc alloy layer comprising at least 2 wt % of an element selected from the group consisting of Fe, Al, Ni, Mn and Sn on said steel core; applying a polyolefin based coating on said zinc alloy layer.
16. A method according to claim 15, whereby said coated wire is manufactured in a continuous, in line process.
17. A method according to any one of claims 15 to 16, whereby said zinc alloy coating is applied by means of hot dip, electrolysis or cladding.
PCT/EP2003/050177 2002-05-23 2003-05-20 Coated wire and method of producing the same WO2003100132A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003238078A AU2003238078A1 (en) 2002-05-23 2003-05-20 Coated wire and method of producing the same
EP03735710A EP1537256A1 (en) 2002-05-23 2003-05-20 Coated wire and method of producing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02100555 2002-05-23
EP02100555.8 2002-05-23

Publications (1)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3680507A1 (en) * 2019-01-11 2020-07-15 NV Bekaert SA Method for making a spring

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JPS63130212A (en) * 1986-11-18 1988-06-02 Sumitomo Metal Ind Ltd Continuous wiring method for wire rod for cold forging
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* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198731, Derwent World Patents Index; Class A88, AN 1987-216379, XP002253420 *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 378 (M - 751) 11 October 1988 (1988-10-11) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 410 (C - 540) 28 October 1988 (1988-10-28) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3680507A1 (en) * 2019-01-11 2020-07-15 NV Bekaert SA Method for making a spring

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