WO2004079032A1 - Zinc-nickel coating layer - Google Patents

Zinc-nickel coating layer

Info

Publication number
WO2004079032A1
WO2004079032A1 PCT/EP2003/050043 EP0350043W WO2004079032A1 WO 2004079032 A1 WO2004079032 A1 WO 2004079032A1 EP 0350043 W EP0350043 W EP 0350043W WO 2004079032 A1 WO2004079032 A1 WO 2004079032A1
Authority
WO
WIPO (PCT)
Prior art keywords
zinc
mesh
coating layer
nickel coating
coated
Prior art date
Application number
PCT/EP2003/050043
Other languages
French (fr)
Inventor
Pierre Etienne
Antonio Laudadio
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 BRPI0318164-2A priority Critical patent/BR0318164B1/en
Priority to AU2003219146A priority patent/AU2003219146A1/en
Priority to PCT/EP2003/050043 priority patent/WO2004079032A1/en
Priority to EP03714940A priority patent/EP1601808A1/en
Priority to CNB038259982A priority patent/CN100523268C/en
Publication of WO2004079032A1 publication Critical patent/WO2004079032A1/en

Links

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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon

Definitions

  • the invention relates to a mesh comprising a zinc-nickel coating layer and to a method of manufacturing such a mesh.
  • the invention further relates to a wire coated with a zinc-nickel coating layer.
  • Galvanising steel articles in a batch process by dipping the article into a bath of molten zinc is generally known in the art.
  • the bath conventionally contains up to 1.5 wt% lead to avoid floating dross formation and to decrease the surface tension of the zinc.
  • lead due to legislation, the use of lead is forbidden in many countries.
  • a mesh coated with a zinc-nickel coating layer is provided.
  • the mesh comprises metal wires.
  • the zinc-nickel coating layer comprises between 0.01 and 0.1 wt% Ni. More preferably, the zinc-nickel coating layer comprises between between 0.035 and 0.065 wt% Ni.
  • the zinc-nickel coating layer is lead free. With 'lead free' is meant that the coating layer does not comprise lead with the exception of unavoidable traces.
  • the zinc-nickel coating is preferably applied in a continuous coating process by passing the mesh through a zinc-nickel bath in a hot dip galvanising process.
  • an alloy layer of the metal of the metal wires and the zinc-nickel coating layer is formed at the interface of the metal wire and the zinc-nickel coating layer.
  • This alloy layer has a thickness between 0.1 and 10 ⁇ m, for example 8 ⁇ m.
  • a mesh coated with a zinc-nickel coating layer according to the present invention shows an improved corrosion resistance compared to a mesh coated with a zinc layer.
  • the mesh may comprise a welded mesh, for example a mesh comprising a number of wires electrically welded at their cross-over points.
  • the mesh may also comprise a woven structure comprising metal wires.
  • the mesh may have rectangular, square, hexagonal or diamond-shaped openings.
  • the mesh may have a planar shape or may be bent or deformed.
  • the wires are preferably steel wires or steel wires coated with a zinc or zinc alloy coating layer.
  • the wires may have circular, oval-shaped, rectangular or any other cross-sections.
  • the wires have circular cross-sections and a diameter between 0.1 and 5 mm, for example between 0.4 and 1 mm.
  • the mesh is coated with a zinc or zinc alloy coating layer before being coated with the zinc-nickel coating layer.
  • the wires of the mesh may be coated with a zinc or zinc alloy coating layer before the mesh is formed.
  • the mesh comprising metal wires is coated with a zinc or zinc alloy coating layer.
  • a wire coated with a nickel-zinc coating layer is provided.
  • the wire preferably comprises a steel wire. More preferably, the wire comprises a steel wire having a zinc or zinc alloy coating layer.
  • a method for the manufacturing of a coated mesh is provided.
  • the method comprises the steps of :
  • the method may further comprise the step of : - applying a zinc coating on said mesh before the application of said zinc-nickel coating layer.
  • the zinc-nickel coating is applied in a continuous coating process.
  • a preferred embodiment comprises a welded mesh having steel wires.
  • a zinc-nickel coating layer is applied in a continuous hot dip galvanising process.
  • the hot dip galvanising bath comprises between 0.048 and
  • the immersion time of the welded mesh in the hot dip galvanising bath is between 10 seconds and 5 minutes.
  • the zinc-nickel coating layer applied on the mesh comprises between
  • an alloy layer of the steel and the zinc-nickel coating layer is formed.
  • the alloy layer has a thickness between 0.1 and 10 ⁇ m.
  • the mesh coated with a zinc-nickel coating layer is subjected to a salt spray test.
  • Table 1 mentions the time span it takes until 5% of the surface is covered with dark brown rust (DBR).
  • DBR dark brown rust

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention relates to a mesh comprising metal wires. The mesh is coated with a zinc-nickel coating layer. The zinc-nickel coating layer comprises between 0.01 and 0.1 wt% Ni and is lead free. The invention further relates to a wire coated with such a zinc-nickel coating layer.

Description

ZINC-NI IφMEEL COATING LAYER
Field of the invention.
The invention relates to a mesh comprising a zinc-nickel coating layer and to a method of manufacturing such a mesh.
The invention further relates to a wire coated with a zinc-nickel coating layer.
Background of the invention. Galvanising steel articles in a batch process by dipping the article into a bath of molten zinc is generally known in the art. The bath conventionally contains up to 1.5 wt% lead to avoid floating dross formation and to decrease the surface tension of the zinc. However, due to legislation, the use of lead is forbidden in many countries.
Summary of the invention.
It is an object of the present invention to provide a mesh having a lead free coating layer and to provide a method of manufacturing a coated mesh using a lead free bath.
It is another object of the invention to provide a mesh comprising a zinc- nickel coating layer having an excellent corrosion resistance.
It is a further object to provide a wire having a zinc-nickel coating layer.
It is still a further object to provide a method of manufacturing a coated mesh by means of a continuous coating process.
According to a first aspect of the present invention a mesh coated with a zinc-nickel coating layer is provided. The mesh comprises metal wires.
The zinc-nickel coating layer comprises between 0.01 and 0.1 wt% Ni. More preferably, the zinc-nickel coating layer comprises between between 0.035 and 0.065 wt% Ni. The zinc-nickel coating layer is lead free. With 'lead free' is meant that the coating layer does not comprise lead with the exception of unavoidable traces.
As described above, generally lead is added to the zinc bath to avoid floating dross formation. According to the present invention, surprisingly it has been found that a zinc-nickel coating could be applied without lead addition.
The zinc-nickel coating is preferably applied in a continuous coating process by passing the mesh through a zinc-nickel bath in a hot dip galvanising process.
In a preferred embodiment, at the interface of the metal wire and the zinc-nickel coating layer, an alloy layer of the metal of the metal wires and the zinc-nickel coating layer is formed. This alloy layer has a thickness between 0.1 and 10 μm, for example 8 μm.
A mesh coated with a zinc-nickel coating layer according to the present invention shows an improved corrosion resistance compared to a mesh coated with a zinc layer.
The mesh may comprise a welded mesh, for example a mesh comprising a number of wires electrically welded at their cross-over points. The mesh may also comprise a woven structure comprising metal wires.
The mesh may have rectangular, square, hexagonal or diamond-shaped openings. The mesh may have a planar shape or may be bent or deformed.
The wires are preferably steel wires or steel wires coated with a zinc or zinc alloy coating layer.
The wires may have circular, oval-shaped, rectangular or any other cross-sections. In a preferred embodiment the wires have circular cross-sections and a diameter between 0.1 and 5 mm, for example between 0.4 and 1 mm.
In a preferred embodiment the mesh is coated with a zinc or zinc alloy coating layer before being coated with the zinc-nickel coating layer. The wires of the mesh may be coated with a zinc or zinc alloy coating layer before the mesh is formed.
Alternatively, the mesh comprising metal wires is coated with a zinc or zinc alloy coating layer.
According to a second aspect of the present invention a wire coated with a nickel-zinc coating layer is provided. The wire preferably comprises a steel wire. More preferably, the wire comprises a steel wire having a zinc or zinc alloy coating layer.
According to a further aspect of the present invention a method for the manufacturing of a coated mesh is provided.
The method comprises the steps of :
- providing a mesh; - applying a zinc-nickel coating on said mesh by hot dip galvanising, said zinc-nickel coating comprising between 0.01 and 0.1 wt% Ni and said zinc-nickel coating being lead free.
The method may further comprise the step of : - applying a zinc coating on said mesh before the application of said zinc-nickel coating layer.
The zinc-nickel coating is applied in a continuous coating process.
Description of the preferred embodiments of the invention.
A preferred embodiment comprises a welded mesh having steel wires. A zinc-nickel coating layer is applied in a continuous hot dip galvanising process. The hot dip galvanising bath comprises between 0.048 and
0.053 wt% Ni.
The immersion time of the welded mesh in the hot dip galvanising bath is between 10 seconds and 5 minutes.
The zinc-nickel coating layer applied on the mesh comprises between
0.035 and 0.065 wt% Ni and is lead free.
At the interface of the metal wire and the zinc-nickel coating layer, an alloy layer of the steel and the zinc-nickel coating layer is formed. The alloy layer has a thickness between 0.1 and 10 μm.
To evaluate the corrosion resistance the mesh coated with a zinc-nickel coating layer is subjected to a salt spray test. Table 1 mentions the time span it takes until 5% of the surface is covered with dark brown rust (DBR). The corrosion resistance of a mesh coated with a zinc-nickel coating layer is given in column 2; the corrosion resistance of a mesh coated with a zinc coating layer is given in column 3.
Table 1
Figure imgf000005_0001

Claims

1. A mesh comprising metal wires, said mesh being coated with a zinc- nickel coating layer, said zinc-nickel coating layer comprising between 0.01 and 0.1 wt% Ni, said zinc-nickel coating layer being lead free.
2. A mesh according to claim 1 , whereby said zinc-nickel coating comprises between 0.035 and 0.065 wt % Ni.
3. A mesh according to claim 1 or 2, whereby an alloy layer having a thickness between 0.1 and 10 μm is formed at the interface of the metal wire and the zinc-nickel coating layer.
4. A mesh according to any one of the preceding claims, whereby said mesh comprises a welded or woven mesh.
5. A mesh according to any one of the preceding claims, whereby said mesh comprises steel wires.
6. A mesh according to any one of the preceding claims, whereby said mesh comprises zinc coated steel wires.
7. A mesh according to any one of the preceding claims, whereby said mesh is coated with a zinc coating layer before being coated with said zinc-nickel coating layer.
8. A metal wire being coated with a zinc-nickel coating layer, said zinc- nickel coating comprising between 0.01 and 0.1 % Ni, said zinc- nickel coating layer being lead free.
9. A metal wire according to claim 8, whereby said metal wire comprises a steel wire or a steel wire coated with a zinc or zinc alloy coating layer.
10. A method of manufacturing a coated mesh, said method comprises the steps of
- providing a mesh; - applying a zinc-nickel coating on said mesh by hot dip galvanising, said zinc-nickel coating comprising between 0.01 and 0.1 wt% Ni and said zinc-nickel coating being lead free.
11. A method according to claim 10, whereby said method comprises the step of
- applying a zinc coating on said mesh before the application of said zinc-nickel coating layer.
PCT/EP2003/050043 2003-03-07 2003-03-07 Zinc-nickel coating layer WO2004079032A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BRPI0318164-2A BR0318164B1 (en) 2003-03-07 2003-03-07 Nickel-zinc coated wire mesh and mesh manufacturing method.
AU2003219146A AU2003219146A1 (en) 2003-03-07 2003-03-07 Zinc-nickel coating layer
PCT/EP2003/050043 WO2004079032A1 (en) 2003-03-07 2003-03-07 Zinc-nickel coating layer
EP03714940A EP1601808A1 (en) 2003-03-07 2003-03-07 Zinc-nickel coating layer
CNB038259982A CN100523268C (en) 2003-03-07 2003-03-07 Zinc-Nickel coating layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/050043 WO2004079032A1 (en) 2003-03-07 2003-03-07 Zinc-nickel coating layer

Publications (1)

Publication Number Publication Date
WO2004079032A1 true WO2004079032A1 (en) 2004-09-16

Family

ID=32946827

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/050043 WO2004079032A1 (en) 2003-03-07 2003-03-07 Zinc-nickel coating layer

Country Status (5)

Country Link
EP (1) EP1601808A1 (en)
CN (1) CN100523268C (en)
AU (1) AU2003219146A1 (en)
BR (1) BR0318164B1 (en)
WO (1) WO2004079032A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468929B1 (en) 2010-12-27 2015-04-08 Fontana Fasteners R.D. S.r.l. Process for coating threaded metallic pieces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103088278B (en) * 2012-11-22 2016-01-27 天长市飞龙金属制品有限公司 The manufacture method of lead-free coated mesh in a kind of coating

Citations (10)

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US3272728A (en) * 1960-10-07 1966-09-13 Pintsch Bamag Ag Method of producing activated electrodes
GB1517454A (en) * 1975-04-02 1978-07-12 Garphytte Bruk Ab Hot dipping process for the preparation of rope and spring wire of carbon steel with corrosion resistance
JPS61179861A (en) * 1984-12-26 1986-08-12 Sadaji Nagabori Zn alloy hot dipped steel plate having high corrosion resistance
US5455122A (en) * 1993-04-05 1995-10-03 The Louis Berkman Company Environmental gasoline tank
US5597656A (en) * 1993-04-05 1997-01-28 The Louis Berkman Company Coated metal strip
JPH09143659A (en) * 1995-11-15 1997-06-03 Nippon Steel Corp Galvannealed steel sheet excellent in initial white rust resistance
EP0852264A1 (en) * 1997-01-02 1998-07-08 Industrial Galvanizadora S.A. Zinc alloys yielding anticorrosive coatings on ferrous materials
WO1998053109A1 (en) * 1997-05-23 1998-11-26 N.V. Union Miniere S.A. Alloy and process for galvanizing steel
KR20000045512A (en) * 1998-12-30 2000-07-15 이구택 Method for producing hot rolled-molten zinc plated steel strip having excellent adherence
EP1186679A1 (en) * 2000-09-12 2002-03-13 n.v. Umicore s.a. Hot-dip galvanising alloy and process

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JPS4928334B1 (en) * 1969-05-26 1974-07-25
CN1037552A (en) * 1989-02-24 1989-11-29 鸡西煤矿专用设备厂 Composite processing technology for resisting corrosion
US5799613A (en) * 1996-10-04 1998-09-01 Ctb, Inc. Galvanized animal cage front and related method
US6753479B2 (en) * 2000-03-17 2004-06-22 Nippon Steel Corporation Plated metal wire and method and apparatus for producing the same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3272728A (en) * 1960-10-07 1966-09-13 Pintsch Bamag Ag Method of producing activated electrodes
GB1517454A (en) * 1975-04-02 1978-07-12 Garphytte Bruk Ab Hot dipping process for the preparation of rope and spring wire of carbon steel with corrosion resistance
JPS61179861A (en) * 1984-12-26 1986-08-12 Sadaji Nagabori Zn alloy hot dipped steel plate having high corrosion resistance
US5455122A (en) * 1993-04-05 1995-10-03 The Louis Berkman Company Environmental gasoline tank
US5597656A (en) * 1993-04-05 1997-01-28 The Louis Berkman Company Coated metal strip
JPH09143659A (en) * 1995-11-15 1997-06-03 Nippon Steel Corp Galvannealed steel sheet excellent in initial white rust resistance
EP0852264A1 (en) * 1997-01-02 1998-07-08 Industrial Galvanizadora S.A. Zinc alloys yielding anticorrosive coatings on ferrous materials
WO1998053109A1 (en) * 1997-05-23 1998-11-26 N.V. Union Miniere S.A. Alloy and process for galvanizing steel
KR20000045512A (en) * 1998-12-30 2000-07-15 이구택 Method for producing hot rolled-molten zinc plated steel strip having excellent adherence
EP1186679A1 (en) * 2000-09-12 2002-03-13 n.v. Umicore s.a. Hot-dip galvanising alloy and process

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; KIM, JONG SANG: "Manufacture of molten zinc-plated steel strip having high plating adherence", XP002261173, retrieved from STN Database accession no. 136:154400 CA *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 003 (C - 395) 7 January 1987 (1987-01-07) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 10 31 October 1997 (1997-10-31) *
RAGUNATHAN P.: "porous nickel electrodes by alloy electroplating techniques", BULLETIN OF ELECTROCHEMISTRY, vol. 2, no. 3, 1986, pages 237 - 241, XP008024443 *
See also references of EP1601808A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468929B1 (en) 2010-12-27 2015-04-08 Fontana Fasteners R.D. S.r.l. Process for coating threaded metallic pieces

Also Published As

Publication number Publication date
AU2003219146A1 (en) 2004-09-28
BR0318164A (en) 2006-02-21
EP1601808A1 (en) 2005-12-07
CN1742108A (en) 2006-03-01
CN100523268C (en) 2009-08-05
BR0318164B1 (en) 2012-10-02

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