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WO1998037252A1 - Metallisation au pistolet - Google Patents

Metallisation au pistolet Download PDF

Info

Publication number
WO1998037252A1
WO1998037252A1 PCT/GB1998/000536 GB9800536W WO9837252A1 WO 1998037252 A1 WO1998037252 A1 WO 1998037252A1 GB 9800536 W GB9800536 W GB 9800536W WO 9837252 A1 WO9837252 A1 WO 9837252A1
Authority
WO
WIPO (PCT)
Prior art keywords
wire
zinc
aluminium
core
alloy
Prior art date
Application number
PCT/GB1998/000536
Other languages
English (en)
Inventor
Terence Patrick Lester
Original Assignee
Metallisation Limited
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 Metallisation Limited filed Critical Metallisation Limited
Priority to AU61097/98A priority Critical patent/AU6109798A/en
Priority to EP98905535A priority patent/EP1003923A1/fr
Publication of WO1998037252A1 publication Critical patent/WO1998037252A1/fr

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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/131—Wire arc spraying

Definitions

  • This invention relates generally to metal spraying, and more particularly to the application by arc spraying of a coating which comprises two metals or alloys.
  • the metals in relation to which the invention has been developed are zinc and aluminium, or zinc and an aluminium/magnesium alloy.
  • Zinc and aluminium coatings have been widely used to protect steel structures from corrosion in aggressive and hostile conditions, e.g. on oil platforms at sea, in industrial plant, etc. Flame and arc spray processes have been widely used to produce coatings on original constructions as well as in repair and maintenance of existing structures. Zinc and aluminium have been separately sprayed to provide a layered coating, and more recently a zinc- 15% aluminium alloy has been available in a wire form which can be arc sprayed.
  • the surface of such zinc/aluminium alloy wire tends to oxidise, and difficulty is encountered in establishing electrical connection with such wire in an arc spraying pistol for carrying the electrical current necày for arc spraying. This results in unsatisfactoiy coatings.
  • Difficulty is encountered in attempting to arc spray a composite or "pseudo-alloy" coating by feeding two wires, one of aluminium of one of zinc, to a conventional arc spraying device. Because the two wires are fed towards the arc from opposite sides of the head of the device, the resulting spray has a greater proportion of aluminium to one side and of zinc to the other side. When the spray head is traversed to apply the coating to a large area of substrate, this difference tends to become evened out but the non-uniformity of the spray pattern means that the technique can really only be used in automatic spraying equipment. When manually spraying, even the most skilled of operatives tends to produce a coating which lacks uniformity.
  • a method of arc spraying wherein a wire comprising two metals or alloys as physically separate constituents is supplied to an arc spraying device.
  • the two metals or alloys comprise zinc and aluminium or zinc and an aluminium/magnesium alloy.
  • the wire comprises a core of one metal or alloy with an exterior layer of the other, and in particular the exterior layer should be a material with which electrical contact is readily established in order to facilitate the arc spraying process.
  • the exterior layer of material preferably is zinc, since electrical contact is readily established therewith.
  • a further consideration which renders zinc the preferred material for the sheath or outer layer of the wire is that aluminium or aluminium/magnesium alloy work harden during processing and if such material were the outer layer it would make the wire less ductile and more prone to cracking of the outer layer.
  • the wire may comprise separate strands of the materials, twisted, braided, or otherwise intertwined together.
  • a wire suitable for use in an arc spraying operation comprising aluminium or an alloy thereof and zinc, as physically separate constituents. Preferably they are arranged as a core and an exterior layer.
  • the core is of an aluminium/magnesium alloy.
  • the composition by weight of the wire may be Al 19%, Mg 1%, Zn balance.
  • the wire may be made by a process in which a core of aluminium or the alloy thereof is passed through a bath of molten zinc to provide a coating thereon, whereafter the wire may be coiled for storage and distribution for use in arc spraying operations.
  • a core of aluminium or the alloy thereof may be provided with its exterior layer or sheath of zinc by being wrapped in a strip thereof.
  • the two materials may be co-extruded.
  • the coating may contain 5-25% by weight of aluminium or an aluminium/magnesium alloy. Preferably it contains approximately 79% by weight zinc, 20% by weight aluminium, and 1% by weight magnesium.
  • the substrate is preferably steel.
  • a substrate may be provided with a coating which comprises a fine and relatively uniform dispersion of zinc and aluminium or aluminium/magnesium.
  • the invention has been found to be particularly suitable for use in applying a coating to structures or parts of containers or vessels which in use are immersed in water, e.g. sea water. It has been found that not only does the invention facilitate the controlled spraying of a zinc/aluminium (alloy) coating, but in particular it has been found that an improved adhesive bond strength between the substrate and the sprayed material may be obtained.
  • a substrate panel of cold rolled mild steel, one millimetre thick and finished to a surface roughness of 0.5 microns was prepared by grit blasting with alumina particles.
  • a Metallisation ArcSpray 528E pistol with a GC head was used to spray a coating using a wire as described hereafter.
  • the conditions of spraying included a voltage of 21-28 volts, current 200A, pistol-substrate distance of 150 millimetres, and a pistol traverse rate of 50 millimetres per second.
  • 2.3 millimetre wires were sprayed; one wire used comprised a zinc wire core wrapped with an Al-5wt%-Mg sheath, and another comprised an Al-5wt% Mg core wrapped with a zinc sheath.
  • Test substrates thus obtained were subjected to tests including corrosion tests in a salt spray cabinet.
  • the salt spray test was earned out to BS 5466 (Part 6) and ISO 3768 using a 3.5% sodium chloride solution.
  • the first sign of the appearance of red rust was watched for.
  • the sample which used the zinc- cored wire wrapped with aluminium-magnesium alloy produced a time until the appearance of red rust of 7010 hours.
  • the sample using the aluminium- magnesium cored wire with a zinc sheath resulted in a time until the appearance of red rust of 5950 hours.
  • Such times until the appearance of red rust are at least comparable with and generally better than the results produced by the spraying of pseudo alloys using feed wires of different materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

La présente invention concerne la métallisation par projection d'un revêtement renfermant du zinc et un alliage aluminium/magnésium, au moyen d'un fil dont l'âme est constituée par un premier matériau et la couche extérieure est constituée par l'autre matériau des matériaux sus-mentionnés.
PCT/GB1998/000536 1997-02-24 1998-02-20 Metallisation au pistolet WO1998037252A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU61097/98A AU6109798A (en) 1997-02-24 1998-02-20 Metal spraying
EP98905535A EP1003923A1 (fr) 1997-02-24 1998-02-20 Metallisation au pistolet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9703823.6A GB9703823D0 (en) 1997-02-24 1997-02-24 Metal spraying
GB9703823.6 1997-02-24

Publications (1)

Publication Number Publication Date
WO1998037252A1 true WO1998037252A1 (fr) 1998-08-27

Family

ID=10808221

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/000536 WO1998037252A1 (fr) 1997-02-24 1998-02-20 Metallisation au pistolet

Country Status (4)

Country Link
EP (1) EP1003923A1 (fr)
AU (1) AU6109798A (fr)
GB (1) GB9703823D0 (fr)
WO (1) WO1998037252A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148147A1 (fr) * 2000-04-20 2001-10-24 Federal-Mogul Friedberg GmbH Fil pour procédé de pulvérisation à arc
EP1285975A1 (fr) * 2001-08-20 2003-02-26 Ford Global Technologies, Inc. Formage d'un article par pulverisation
EP1790752A1 (fr) * 2005-11-24 2007-05-30 Sulzer Metco AG (Switzerland) Materiel pour pulverization thérmique, revêtement pulverizé, méthode pour obtenir ce revêtement et composant revetu
CN111593288A (zh) * 2020-05-08 2020-08-28 哈尔滨工程大学烟台研究院 一种防污防腐涂层用电弧喷涂药芯焊丝及其应用

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1068960A (fr) * 1951-11-22 1954-07-02 Perfectionnements apportés aux procédés de métallisation par projection
GB816391A (en) * 1955-02-08 1959-07-15 British Oxygen Co Ltd Methods for depositing alloy coatings by gas shielded electric arcs
FR1194596A (fr) * 1958-04-11 1959-11-10 Metallisation De Prec Procédé perfectionné de métallisation
EP0064840A1 (fr) * 1981-04-29 1982-11-17 Ppg Industries, Inc. Electrode, procédé pour sa préparation et son utilisation dans l'électrolyse
JPS627843A (ja) * 1985-07-04 1987-01-14 Yanmar Diesel Engine Co Ltd 異材同時線爆溶射法及び溶射部品
JPS6452051A (en) * 1987-08-24 1989-02-28 Dainippon Toryo Kk Formation of thermally sprayed film
WO1991000373A1 (fr) * 1989-06-29 1991-01-10 Alcan International Limited Fabrication d'alliages metalliques
US5294462A (en) * 1990-11-08 1994-03-15 Air Products And Chemicals, Inc. Electric arc spray coating with cored wire

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1068960A (fr) * 1951-11-22 1954-07-02 Perfectionnements apportés aux procédés de métallisation par projection
GB816391A (en) * 1955-02-08 1959-07-15 British Oxygen Co Ltd Methods for depositing alloy coatings by gas shielded electric arcs
FR1194596A (fr) * 1958-04-11 1959-11-10 Metallisation De Prec Procédé perfectionné de métallisation
EP0064840A1 (fr) * 1981-04-29 1982-11-17 Ppg Industries, Inc. Electrode, procédé pour sa préparation et son utilisation dans l'électrolyse
JPS627843A (ja) * 1985-07-04 1987-01-14 Yanmar Diesel Engine Co Ltd 異材同時線爆溶射法及び溶射部品
JPS6452051A (en) * 1987-08-24 1989-02-28 Dainippon Toryo Kk Formation of thermally sprayed film
WO1991000373A1 (fr) * 1989-06-29 1991-01-10 Alcan International Limited Fabrication d'alliages metalliques
US5294462A (en) * 1990-11-08 1994-03-15 Air Products And Chemicals, Inc. Electric arc spray coating with cored wire

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 185 (C - 428) 13 June 1987 (1987-06-13) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 241 (C - 604) 6 June 1989 (1989-06-06) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148147A1 (fr) * 2000-04-20 2001-10-24 Federal-Mogul Friedberg GmbH Fil pour procédé de pulvérisation à arc
EP1285975A1 (fr) * 2001-08-20 2003-02-26 Ford Global Technologies, Inc. Formage d'un article par pulverisation
US6595263B2 (en) 2001-08-20 2003-07-22 Ford Global Technologies, Inc. Method and arrangement for utilizing a psuedo-alloy composite for rapid prototyping and low-volume production tool making by thermal spray form techniques
US7273669B2 (en) 2001-08-20 2007-09-25 Ford Global Technologies, Llc Spray-formed articles made of pseudo-alloy and method for making the same
EP1790752A1 (fr) * 2005-11-24 2007-05-30 Sulzer Metco AG (Switzerland) Materiel pour pulverization thérmique, revêtement pulverizé, méthode pour obtenir ce revêtement et composant revetu
US8628860B2 (en) 2005-11-24 2014-01-14 Sulzer Metco Ag Thermal spraying material, a thermally sprayed coating, a thermal spraying method and also a thermally coated workpiece
US9562281B2 (en) 2005-11-24 2017-02-07 Oerlikon Metco Ag, Wohlen Thermal spraying material, a thermally sprayed coating, a thermal spraying method and also a thermally coated workpiece
CN111593288A (zh) * 2020-05-08 2020-08-28 哈尔滨工程大学烟台研究院 一种防污防腐涂层用电弧喷涂药芯焊丝及其应用

Also Published As

Publication number Publication date
AU6109798A (en) 1998-09-09
GB9703823D0 (en) 1997-04-16
EP1003923A1 (fr) 2000-05-31

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