WO1998037252A1 - Metal spraying - Google Patents
Metal spraying Download PDFInfo
- 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
Links
- 238000005507 spraying Methods 0.000 title claims description 25
- 229910052751 metal Inorganic materials 0.000 title claims description 13
- 239000002184 metal Substances 0.000 title claims description 13
- 239000011701 zinc Substances 0.000 claims abstract description 33
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 30
- 239000004411 aluminium Substances 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 13
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 13
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910001297 Zn alloy Inorganic materials 0.000 description 3
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000009862 microstructural analysis Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU61097/98A AU6109798A (en) | 1997-02-24 | 1998-02-20 | Metal spraying |
EP98905535A EP1003923A1 (en) | 1997-02-24 | 1998-02-20 | Metal spraying |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9703823.6 | 1997-02-24 | ||
GBGB9703823.6A GB9703823D0 (en) | 1997-02-24 | 1997-02-24 | Metal spraying |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998037252A1 true WO1998037252A1 (en) | 1998-08-27 |
Family
ID=10808221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1998/000536 WO1998037252A1 (en) | 1997-02-24 | 1998-02-20 | Metal spraying |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1003923A1 (en) |
AU (1) | AU6109798A (en) |
GB (1) | GB9703823D0 (en) |
WO (1) | WO1998037252A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1148147A1 (en) * | 2000-04-20 | 2001-10-24 | Federal-Mogul Friedberg GmbH | Wire for electric arc spraying process |
EP1285975A1 (en) * | 2001-08-20 | 2003-02-26 | Ford Global Technologies, Inc. | A method of spray forming an article |
EP1790752A1 (en) * | 2005-11-24 | 2007-05-30 | Sulzer Metco AG (Switzerland) | Thermal spray material, sprayed coating, thermal spray method and coated component |
CN111593288A (en) * | 2020-05-08 | 2020-08-28 | 哈尔滨工程大学烟台研究院 | Arc spraying flux-cored wire for antifouling and anticorrosive coating and application thereof |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1068960A (en) * | 1951-11-22 | 1954-07-02 | Improvements in spray metallization processes | |
GB816391A (en) * | 1955-02-08 | 1959-07-15 | British Oxygen Co Ltd | Methods for depositing alloy coatings by gas shielded electric arcs |
FR1194596A (en) * | 1958-04-11 | 1959-11-10 | Metallisation De Prec | Advanced metallization process |
EP0064840A1 (en) * | 1981-04-29 | 1982-11-17 | Ppg Industries, Inc. | Electrode, method for its preparation and its use in electrolysis |
JPS627843A (en) * | 1985-07-04 | 1987-01-14 | Yanmar Diesel Engine Co Ltd | Simultaneous wire explosion spraying method for different materials and sprayed parts |
JPS6452051A (en) * | 1987-08-24 | 1989-02-28 | Dainippon Toryo Kk | Formation of thermally sprayed film |
WO1991000373A1 (en) * | 1989-06-29 | 1991-01-10 | Alcan International Limited | Manufacture of metallic alloys |
US5294462A (en) * | 1990-11-08 | 1994-03-15 | Air Products And Chemicals, Inc. | Electric arc spray coating with cored wire |
-
1997
- 1997-02-24 GB GBGB9703823.6A patent/GB9703823D0/en active Pending
-
1998
- 1998-02-20 EP EP98905535A patent/EP1003923A1/en not_active Withdrawn
- 1998-02-20 WO PCT/GB1998/000536 patent/WO1998037252A1/en not_active Application Discontinuation
- 1998-02-20 AU AU61097/98A patent/AU6109798A/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1068960A (en) * | 1951-11-22 | 1954-07-02 | Improvements in spray metallization processes | |
GB816391A (en) * | 1955-02-08 | 1959-07-15 | British Oxygen Co Ltd | Methods for depositing alloy coatings by gas shielded electric arcs |
FR1194596A (en) * | 1958-04-11 | 1959-11-10 | Metallisation De Prec | Advanced metallization process |
EP0064840A1 (en) * | 1981-04-29 | 1982-11-17 | Ppg Industries, Inc. | Electrode, method for its preparation and its use in electrolysis |
JPS627843A (en) * | 1985-07-04 | 1987-01-14 | Yanmar Diesel Engine Co Ltd | Simultaneous wire explosion spraying method for different materials and sprayed parts |
JPS6452051A (en) * | 1987-08-24 | 1989-02-28 | Dainippon Toryo Kk | Formation of thermally sprayed film |
WO1991000373A1 (en) * | 1989-06-29 | 1991-01-10 | Alcan International Limited | Manufacture of metallic alloys |
US5294462A (en) * | 1990-11-08 | 1994-03-15 | Air Products And Chemicals, Inc. | Electric arc spray coating with cored wire |
Non-Patent Citations (2)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1148147A1 (en) * | 2000-04-20 | 2001-10-24 | Federal-Mogul Friedberg GmbH | Wire for electric arc spraying process |
EP1285975A1 (en) * | 2001-08-20 | 2003-02-26 | Ford Global Technologies, Inc. | A method of spray forming an article |
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 (en) * | 2005-11-24 | 2007-05-30 | Sulzer Metco AG (Switzerland) | Thermal spray material, sprayed coating, thermal spray method and coated component |
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 (en) * | 2020-05-08 | 2020-08-28 | 哈尔滨工程大学烟台研究院 | Arc spraying flux-cored wire for antifouling and anticorrosive coating and application thereof |
Also Published As
Publication number | Publication date |
---|---|
GB9703823D0 (en) | 1997-04-16 |
AU6109798A (en) | 1998-09-09 |
EP1003923A1 (en) | 2000-05-31 |
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