EP3649273A1 - A metallic substrate bearing a cold sprayed coating - Google Patents
A metallic substrate bearing a cold sprayed coatingInfo
- Publication number
- EP3649273A1 EP3649273A1 EP18739954.8A EP18739954A EP3649273A1 EP 3649273 A1 EP3649273 A1 EP 3649273A1 EP 18739954 A EP18739954 A EP 18739954A EP 3649273 A1 EP3649273 A1 EP 3649273A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metallic substrate
- coating
- anyone
- gas
- substrate
- 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.)
- Granted
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 94
- 238000000576 coating method Methods 0.000 title claims abstract description 92
- 239000011248 coating agent Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 37
- 239000000843 powder Substances 0.000 claims description 32
- 239000007921 spray Substances 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 12
- 239000011777 magnesium Substances 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000009718 spray deposition Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000003570 air Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 238000005554 pickling Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 20
- 230000007797 corrosion Effects 0.000 description 20
- 230000008569 process Effects 0.000 description 9
- 230000004224 protection Effects 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010288 cold spraying Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum rare earth Chemical class 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011800 void material Substances 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
Definitions
- the present invention relates to a metallic substrate bearing a cold sprayed coating and a method for the manufacture of this metallic substrate bearing a cold sprayed coating.
- the invention is particularly well suited for the industry, civil engineering and construction fields.
- metallic substrates are often use in order to produce metallic parts, in particular for marine metallic structures.
- the metallic parts can be steel pilings, bearing piles, combined walls, moles, parts of offshore wind powers or plates and beams for offshore structures.
- the main problem of these parts is their resistance to corrosion. Indeed, the parts are used in corrosive areas, i.e. in sea area. Due to these corrosive areas, the lifetime of such parts can be divided by 5 when compared to the use of such parts on earth.
- metallic substrates having a higher resistance to corrosion in order to improve their lifetime especially in corrosive atmospheres.
- Some protections can be used to protect these parts. For example, it is known to produce these parts with a sacrificial thickness, the lifetime depending on the thickness of the part. However, even if the sacrificial thicknesses improve the lifetime of these parts, they do not really improve the corrosion resistance. It is also know to deposit paints or metallic coatings such as a zinc coating by hot-dip galvanizing. However, these deposition processes are very expensive and difficult to implement at industrial scale especially for long and heavy products.
- a coil is firstly annealed and then hot-dipped in a zinc bath in the hot-dip galvanizing line.
- a zinc bath in the hot-dip galvanizing line.
- the steel pilings are produced by hot-rolling at about 1250°C.
- the semi-finished products called "beam blank” pass through walking beam furnace that are mobile. Then, oxides formed during the reheating are removed from the beam blank. The blanks pass through rolling mills. After, the length of the steel piling is about 100m. The steel piling is then cut in order to obtain a final length around 20m. The steel piling is finally cooled and can be implementing in the soil in the sea. Due to the length and the shape of the steel piling, it cannot be hot-dipped in continuous hot-dip galvanizing lines.
- Cold spray also called as “Cold Gas Dynamic Spray”.
- Cold spray can be classified into two categories depending on different spraying pressures: low-pressure cold spray and high-pressure cold spray.
- Cold spray process mainly refers to a process in which tiny solid particles are sprayed onto the surface of a metallic or insulating substrate using a compressed gas flow with a supersonic speed, and deposited following strong plastic deformation, to form a coating.
- the spraying since the spraying is performed under a low temperature (below 600°C), phenomena such as oxidation, grain growth and phase transition are difficult to occur for spraying materials such that the properties of original materials can be well maintained.
- the coating manufactured by a cold spray process has a denser microstructure, a lower heat-affected residual stress and a better long-acting protection for superstructures of the marine oil and gas equipments as compared to conventional thermally sprayed coatings, because during the cold spray, the process temperature is reduced, and solid particles is deposited mainly depending on the plastic deformation due to improvement in kinetic energy, and the particles are deformed more fully.
- the cold spray method can be used for covering metallic substrate in industry, civil engineering and construction field.
- metallic aluminum particles are generally recognized as relatively ideal cold spraying materials due to their low yield strength, good plastic deformation capacity and excellent corrosion-resistance property.
- a metallic aluminum coating has been widely used as an anti-corrosive coating of metallic components, wherein the metallic aluminum coating as a anode coating, not only plays a role in shielding corrosive media from reacting with the substrate, but also can be used as a sacrificial anode material, providing a cathodic protection to protect metallic substrates from corrosion. However, they provide a very low sacrificial protection.
- the patent application CN105525286 discloses components of a cold spraying aluminum-based self-lubrication abrasion-resistant coating and a preparation technology of the cold spraying aluminum-based self-lubrication abrasion-resistant coating, and belongs to the technology of surface treatment of metal.
- the coating comprises Al, AI2O3 and M, wherein the M is a combination of aluminum rare earth alloy and/or aluminum magnesium alloy and molybdenum disulfide and/or tungsten disulfide; the volume ratio X of the AI 2 O 3 to the sum of the Al and the AI 2 O 3 is 28-32%; the total mass ratio Y of the M to the coating is 0.96-70.08%; and the structure of the coating is represented as (AI-Xvol%AI 2 O3)- Ywt%M.
- the method is dedicated to marine steel structures.
- the preparation of the coating is not easy to perform since the coating comprising several elements including Al, AI 2 O 3 , M; the can comprise 4 different elements. Moreover, the proportion of each element is difficult to manage during the cold spray deposition allowing sometimes an heterogeneous composition coating. Additionally, the coating comprises molybdenum disulfide and/or tungsten disulfide as lubricant. Nevertheless, the tungsten and the molybdenum are really expensive metallic elements and do not improve the corrosion resistance. Finally, although the coating has a barrier effect mainly thanks to the presence of Al, the coating is not sufficiently sacrificial. Therefore, the resistance to corrosion decreases resulting in among others the presence of red rust.
- the object of the invention is to provide a coated metallic substrate having an improved resistance to corrosion, in particular having a barrier effect and a sacrificial protection.
- the object is also to provide a coated metallic substrate having a longer life time especially in corrosive area.
- it also makes available an easy to implement method for the manufacture of such coated metallic substrates.
- electrochemical potential has to be at least 50mV more negative than the potential of the metallic substrate.
- a maximum potential of -0.78V with respect to a saturated calomel electrode (SCE) is needed. It is preferable not to decrease the potential at a value of -1 .4V/SCE, even -1 .25V/SCE which would involve a fast consumption and would finally decrease the period of protection of steel.
- SCE saturated calomel electrode
- Another object is achieved by providing a method for the manufacture of a metallic substrate bearing a cold sprayed coating according to claim 1 1 .
- the method can also comprise any characteristic of claims 12 to 22.
- Figure 1 is a schematic illustration of a cold spray device.
- Figure 2 is a schematic illustration of a powder particle having a spherical shape.
- Figure 3 is a schematic illustration of a powder particle having an angular shape.
- Figure 4 is a schematic illustration of a powder particle having a spheroidal shape.
- the thickness of the layers represented is exclusively for purposes of illustration and cannot be considered to be a representation of the different layers to scale.
- Portion is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, as a percentage between 0 and 100% by volume,
- the hardness can be defined by HV(0.1 ) or HV(0.01 ) according to the norm ISO 6507-1 and
- the invention relates to a metallic substrate bearing a cold sprayed coating coated with a coating comprising:
- such coating not comprising at least one of the following elements: Molybdenum disulfide (M0S2), Tungsten Disulfide (WS2) and zinc,
- the coating having a porosity between 0.9 and 8.0%
- microstructure of the coating does not comprise an intermetallic diffusion layer made of Fe and Al.
- the metallic substrate bearing a cold sprayed coating according to the present invention has a sacrificial protection and a barrier effect mainly due to the presence of magnesium, optionally AI 2 O 3 and aluminum in specific amount. Additionally, it is believed that the coating composition has a low porosity thanks to the specific compounds of the coating. Moreover, the coating according to the present invention does not comprise Molybdenum disulfide (MoS 2 ) and/or Tungsten Disulfide (WS 2 ) since it is believed that both compounds do not improve the corrosion resistance. Thus, the metallic substrate is well protected against corrosion, the appearance of the red rust is prevented or at least significantly delayed.
- MoS 2 Molybdenum disulfide
- WS 2 Tungsten Disulfide
- the coating does not comprise zinc. Indeed, it is believed that due to the electrochemical potential difference between Al and Zn, Zn can play the role of anode and Al of the cathode. Consequently, there is a risk that in corrosive medium, Zn dissolves and quickly corrodes leading to open porosity. Consequently, it can result in a decrease of the corrosion resistance properties.
- the coating can comprise unavoidable impurities.
- the optionally impurities are chosen from Fe, Si, Cu, the content by weight of each additional element being inferior to 0.3% by weight.
- the coating comprises from 2.0 to 8.0, more preferably from 3.0 to 7.0% and more advantageously between 4.0 and 6.0% by weight of magnesium.
- the coating has a porosity between 1 .0 and 5.0%, more preferably between 1 .0 and 2.0%.
- the coating microstructure does not include an intermetallic layer between the coating and the metallic substrate made of Fe and Al. More preferably, the microstructure of the coating does not comprise an intermetallic diffusion layer made of FeAI 3 and Fe 2 AI 5 . Advantageously, the microstructure of the coating does not comprise an intermetallic diffusion layer. Without willing bound by any theory, it seems that the specific microstructure of the present invention prevents the risks of coating brittleness and therefore improves the adherence of the coating on the metallic substrate.
- the thickness of the coating is between 100 and 350 ⁇ , more preferably between150 and 250 ⁇ .
- the coating hardness is between 90 and 140HV(0.1 ) and more preferably between 100 and 140HV(0.1 ).
- the hardness of the coating is between 1 15 and 125H V(0.1 ).
- the metallic substrate can be chosen among: aluminum substrate, steel substrate, stainless steel substrate, copper substrate, iron substrate, copper alloys substrate, titanium substrate, cobalt substrate or nickel substrate.
- the metallic substrate is a steel substrate.
- the metallic substrate is a part chosen from: a piling, a wire, a plate, a tube and a beam.
- the method for the manufacture of a metallic substrate bearing a cold sprayed coating according to the present invention comprises the following step:
- the cold spray deposition of a powder mixture comprising from 1 .0 to 10.0% by weight of magnesium, between 10 and 20% by weight of AI2O3, the balance being aluminum and wherein the coating does not comprise at least one of the following elements: Molybdenum disulfide (MoS 2 ), Tungsten Disulfide (WS 2 ) and zinc, on the metallic substrate, said deposition being performed in a cold spray device comprising a heating section, a powder feeder and a supersonic nozzle.
- MoS 2 Molybdenum disulfide
- WS 2 Tungsten Disulfide
- zinc zinc
- the surface treatment is chosen from: shot blasting, pickling, polishing, sand blasting and grinding.
- the surface preparation step is performed so as to obtain a surface roughness of the metallic substrate above 5 ⁇ , more preferably between 5 and 30 ⁇ and advantageously between 10 and 20 ⁇ . Indeed, without willing to be bound by any theory, it is believed that the surface preparation modified the surface texture of the metallic substrate allowing an increase of the coating adhesion.
- the surface treatment is preferably shot blasting.
- the metallic substrate can comprise an oxide layer on its surface originating from the elaboration route of the metallic substrate.
- the surface preparation can remove oxides present on the metallic substrate to further improve the coating adhesion on the metallic substrate.
- the metallic substrate is a steel substrate
- a layer of mill scale is generally formed after the hot-rolling.
- the surface preparation can remove this mill scale layer.
- step C) comprises the following sub-steps:
- Figure 1 illustrates a typical cold spray device wherein preferably, in step C), at least one gas under pressure is injected in the cold spray device.
- the gas is chosen among: nitrogen, argon, helium, air or a mixture thereof.
- the pressure of the gas is between 1 and 10 MPa.
- the pressure of the gas is between 2 and 7 MPa.
- a first part of the gas is heated in the heating section 1 at a temperature between 200 and 600°C, more preferably between 300 and 500°C and for example of 400°C.
- the second part of the gas navigates through the powder feeder section 2 in order to carrier the powder mixture.
- steps C.ii) and C.iii) are performed simultaneously.
- the first part represents above 60% by volume of the gas and the second part represents below 40% by volume of the gas. More preferably, the first part represents above 70% by volume of the gas and the second part represents below 30% by volume of the gas.
- the first part represents above 80% by volume of the gas and the second part represents below 20% by volume of the gas.
- step C.v the first and the second parts of gas are mixed before the ejector of the supersonic nozzle 3.
- the mixing gases comprising the powder mixture crosses the ejector of the supersonic nozzle 4 resulting in an acceleration of the gases at supersonic speed.
- the supersonic nozzle is a tube that is pinched in the middle, making a carefully balanced, asymmetric hourglass shape.
- the powder mixture particles impact the metallic substrate 4 to create a coating.
- the supersonic speed is between 350 and 1200m.s "1 , preferably between 400 and l OOOm.s “1 and more preferably between 400 and 850m. s "1 .
- the distance projection between the ejector supersonic and the metallic substrate is between 10 and 50mm, more preferably between 20 and 40mm and for example of 30mm.
- the projection angle between the supersonic nozzle and the metallic substrate is between 70 and 1 10°.
- the powder mixture comprises from 2.0 to 8.0%, more preferably from 3.0 to 7.0% and more advantageously between 4.0 and 6.0% by weight of magnesium.
- the powder mixture comprises between 10 and 20% by weight of AI2O3.
- the powder mixture does not comprise zinc.
- the powder particles shape is spherical, spheroidal or angular.
- Figure 2 illustrates a spherical powder particle.
- Figure 3 illustrates an example of angular powder particle.
- an angular particle can have a hexagonal shape, a cubic shape or a triangular shape.
- Figure 4 illustrates a spheroidal powder particle.
- the powder particles have a size above 10 ⁇ , more preferably between 10 and 150 ⁇ and more preferably between 10 and ⁇ ⁇ .
- the hardness of the powder particles is between 60 and 90HV(0.01 ).
- the cold spray method according to the present invention can be used locally on the metallic substrate.
- the productivity of the cold spray method increases.
- it can be used on piling products in order to protect preferentially at least one specific area, the one subjected to the corrosion medium.
- the coating of a metallic substrate can be damaged. It can be due to scratches for example during the transport or during the building of metallic structures.
- the method according to the present invention it is possible to repair the metallic coating by depositing the cold sprayed coating on the damaged area(s).
- the local deposition of the coating on the metallic substrate with the method according to the present invention is easy to implement and quick improving the productivity.
- the cold sprayed metallic substrate can be used for the manufacture offshore structure, offshore wind power, Marine current power, hull of a boat, coastal and port infrastructure, quay wall and, underground structure, rail, and anchorage.
- the invention will now be explained in trials carried out for information only. They are not limiting.
- the metallic substrate is a steel substrate having the following composition according to the EN 10248-1 norm:
- Trial 1 is a cold sprayed coated steel sheet wherein the coating comprising 5% by weight of Mg, the balance being Al.
- Trial 2 is a cold sprayed coated steel sheet wherein the coating comprising
- Trial 3 is a cold sprayed coated steel sheet wherein the coating comprising 15% by weight of AI 2 O and Al.
- the steel sheet was first shot blasted to obtain a surface roughness of 14.5 ⁇ . Then, the powder mixture was deposited by cold spray process.
- the parameter of the cold spray process was as follows:
- Trial 1 according to the present invention is highly sacrificial compared to Trials 2 to 3. Coupling potential of Trial 1 is under -0.78V/SCE as required.
- Trials 1 to 3 were prepared and subjected to a corrosion test to evaluate the protection of the coated steel sheets.
- the salt fog comprises 5% by weight of NaCI.
- the salt fog had the following characteristics:
- Trial 1 shows excellent protection against corrosion when compared to Trials 2 and 3. Moreover, Trial 2 shows red rust after 15 days of salt spray test.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2017/000816 WO2019008404A1 (en) | 2017-07-04 | 2017-07-04 | A metallic substrate bearing a cold sprayed coating |
PCT/IB2018/054909 WO2019008503A1 (en) | 2017-07-04 | 2018-07-02 | A metallic substrate bearing a cold sprayed coating |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3649273A1 true EP3649273A1 (en) | 2020-05-13 |
EP3649273B1 EP3649273B1 (en) | 2021-09-01 |
Family
ID=59416737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18739954.8A Active EP3649273B1 (en) | 2017-07-04 | 2018-07-02 | A metallic substrate bearing a cold sprayed coating |
Country Status (2)
Country | Link |
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EP (1) | EP3649273B1 (en) |
WO (2) | WO2019008404A1 (en) |
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US11662300B2 (en) | 2019-09-19 | 2023-05-30 | Westinghouse Electric Company Llc | Apparatus for performing in-situ adhesion test of cold spray deposits and method of employing |
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CN112522696B (en) * | 2020-11-30 | 2021-09-07 | 江苏珀然轮毂有限公司 | Equipment for shot blasting metal coating on surface of automobile hub |
CN112760633B (en) * | 2020-12-30 | 2022-03-15 | 武汉大学 | Low-pressure cold spraying method for low-melting-point alloy |
CN114182249B (en) * | 2021-12-01 | 2023-11-17 | 常州大学 | Method for improving corrosion resistance of cold-sprayed double-layer coating |
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KR20050081252A (en) * | 2004-02-13 | 2005-08-18 | 고경현 | Porous metal coated member and manufacturing method thereof using cold spray |
CN103255410B (en) * | 2013-04-24 | 2015-08-26 | 中国航空工业集团公司北京航空材料研究院 | The preparation method of the anticorrosive protective coating of a kind of magnesium alloy |
CN104046939B (en) * | 2014-06-25 | 2017-02-22 | 中国船舶重工集团公司第七二五研究所 | Preparation method of anticorrosive composite coating for LNG (liquefied natural gas) gasifier surface |
CN105525286B (en) | 2016-01-06 | 2018-06-12 | 中国石油大学(华东) | A kind of cold spraying aluminium base self-lubricating abrasion-resistant erosion resisting coating and preparation method thereof |
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US11935662B2 (en) | 2019-07-02 | 2024-03-19 | Westinghouse Electric Company Llc | Elongate SiC fuel elements |
US11662300B2 (en) | 2019-09-19 | 2023-05-30 | Westinghouse Electric Company Llc | Apparatus for performing in-situ adhesion test of cold spray deposits and method of employing |
CN113564568A (en) * | 2021-07-06 | 2021-10-29 | 上海巴洛特新材料研究有限公司 | High-oxidation-resistance nano coating process for surface of magnesium aluminum part |
CN115958191A (en) * | 2022-12-16 | 2023-04-14 | 北京中铁科新材料技术有限公司 | Composite anticorrosive layer and preparation method thereof |
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EP3649273B1 (en) | 2021-09-01 |
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