CN112080716A - Hydrophobic corrosion-resistant coating material and preparation method thereof - Google Patents
Hydrophobic corrosion-resistant coating material and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 74
- 239000011248 coating agent Substances 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 59
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 50
- 238000005260 corrosion Methods 0.000 title claims abstract description 48
- 230000007797 corrosion Effects 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 95
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000919 ceramic Substances 0.000 claims abstract description 32
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 32
- 239000011737 fluorine Substances 0.000 claims abstract description 32
- 238000007751 thermal spraying Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims description 57
- 239000010410 layer Substances 0.000 claims description 35
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 28
- 239000002131 composite material Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 21
- 239000007921 spray Substances 0.000 claims description 18
- 229910052593 corundum Inorganic materials 0.000 claims description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 229910010293 ceramic material Inorganic materials 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 10
- 229910000943 NiAl Inorganic materials 0.000 claims description 9
- 239000011812 mixed powder Substances 0.000 claims description 8
- 239000002356 single layer Substances 0.000 claims description 8
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910001120 nichrome Inorganic materials 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000005524 ceramic coating Methods 0.000 claims description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 4
- -1 NiCrAl Chemical compound 0.000 claims description 3
- 229910003322 NiCu Inorganic materials 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 229920001774 Perfluoroether Polymers 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- JJILSUYJNDUISN-UHFFFAOYSA-N octan-2-ylhydrazine;sulfuric acid Chemical compound OS(O)(=O)=O.CCCCCCC(C)NN JJILSUYJNDUISN-UHFFFAOYSA-N 0.000 claims 1
- 238000007788 roughening Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
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- 238000001035 drying Methods 0.000 description 10
- 239000010431 corundum Substances 0.000 description 6
- 238000005488 sandblasting Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
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- 229910000831 Steel Inorganic materials 0.000 description 4
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- 239000010959 steel Substances 0.000 description 4
- 229910009594 Ti2AlN Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
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- 238000002156 mixing Methods 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- 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
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- Chemical & Material Sciences (AREA)
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- 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
The invention discloses a hydrophobic corrosion-resistant coating material and a preparation method thereof, belonging to the technical field of thermal spraying. A fluorine-containing material and ceramic powder are used as modified raw materials, and one or two layers of corrosion-resistant hydrophobic coatings are prepared on the metal surface by utilizing a thermal spraying technology. The invention utilizes the controllable appearance of the surface of the plasma spraying coating tissue, the surface is formed with a micro-nano floating structure, and a certain amount of low surface energy substances are doped to achieve the aim of dewatering, reduce the contact area of the metal part and the liquid medium in the corrosive environment and further improve the service life of the metal part in the corrosive environment. The invention combines the high-flux technology to prepare the foundation and can also prepare the multi-component hydrophobic anti-corrosion coating. The coating prepared by the invention can be widely applied to various equipment facilities in liquid corrosive medium, such as a cross-sea bridge, a naval vessel covering piece, a metal connecting piece, an offshore drilling platform, a coastal power plant and the like.
Description
Technical Field
The invention relates to a hydrophobic corrosion-resistant coating material and a preparation method thereof, belonging to the technical field of thermal spraying.
Background
Ocean equipment facilities such as a cross-sea bridge, an offshore drilling platform, a coastal power plant and the like generally need to be in safe service for decades, and the invested capital in the construction period is huge, so that the offshore drilling platform has a great significance for national civil design and national defense construction, and along with continuous exploration of China on deep ocean and diversification of the equipment facilities, the offshore drilling platform has very important economic significance and social significance for protecting long-term safe operation of the facilities.
The corrosion of marine environment is one of the most severe corrosion, which can affect the structural performance of marine major equipment and facilities, shorten the service life of equipment and cause a series of problems of safety, environment and economic loss. Seawater is a very corrosive electrolyte solution, contains a large amount of salts, oxygen, carbon dioxide, nitrogen and other substances, and also contains a large amount of microorganisms; this also means that marine equipment is not only exposed to corrosion from sea water, but also to microbial corrosion and biofouling caused by marine microbial attachment. Currently, the annual global corrosion losses account for about 3-5% of the total global national production, with marine corrosion losses accounting for about 1/3% of the total corrosion losses, which is very alarming, but if we take effective anti-corrosion measures, about 25-40% of the corrosion losses can be avoided. Therefore, how to reduce the corrosion of the corrosive environment to various major equipment and facilities becomes an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a hydrophobic corrosion-resistant coating material, a hydrophobic coating is prepared by utilizing a thermal spraying technology, the corrosion of a corrosion environment to various major equipment facilities is reduced based on the reduction of the contact area with a corrosion medium, meanwhile, the overall mechanical property of the coating is improved and the safe operation life of the coating is prolonged by utilizing ceramic as a reinforcing base, and the coating consists of a bottom bonding layer and a top ceramic hydrophobic composite layer.
The coating consists of a bottom bonding layer and a top ceramic hydrophobic composite layer; wherein, the ceramic material accounts for 65-90 parts by weight, and the fluorine-containing material accounts for 10-35 parts by weight.
The bonding layer comprises the following raw materials: AT40, NiAl, NiCu, NiCr, NiCrAl, nimal, NiCrAlY, NiCoCrAlY, Cu alloy.
The raw materials of the ceramic hydrophobic composite layer comprise a ceramic material and a fluorine-containing material, wherein the ceramic material is Al2O3、ZrO2、TiO2、WC、Ti2AlC、Ti2One or more of AlN is mixed in any proportion.
The fluorine-containing material is polytetrafluoroethylene powder or perfluoroalkoxy vinyl ether copolymer powder, the ceramic hydrophobic composite layer is a single layer or double layers, and the single-layer ceramic hydrophobic composite coating is obtained by spraying a ceramic-doped fluorine-containing material; the double-layer ceramic hydrophobic composite coating is formed by depositing a ceramic coating and then depositing a fluorine-containing material on the surface layer.
Preferably, the raw materials of the bonding layer and the ceramic material are powder, and the particle size of the particles is 25-75 μm.
The method can well combine the fluorine-containing material and the ceramic material, the coating part can react to generate the nano material in situ, and meanwhile, the fluorine-containing material with lower hardness can reduce micro-nano cracks caused by collision of ceramic particles in the spraying process, so that the mechanical property and the corrosion resistance of the coating are further improved.
The invention also aims to provide a preparation method of the hydrophobic corrosion-resistant coating material, which comprises the following steps:
(1) and (4) carrying out physical coarsening on the metal matrix, and spraying a nickel-based bonding layer after cleaning.
(2) Spraying a ceramic doped fluorine-containing material or spraying a ceramic wear-resistant layer and then spraying a fluorine-containing material to finally obtain a single-layer ceramic hydrophobic composite coating or a double-layer ceramic hydrophobic composite coating.
The single-layer ceramic hydrophobic composite coating is sprayed by adopting mixed powder of ceramic doped with fluorine-containing material, the low melting point of the fluorine-containing material is easy to volatilize, and the high melting point of the ceramic material is considered, and the mixed powder is added at a position 5-20mm away from a gun mouth and vertical to a flame center according to the spraying power of a thermal spraying gun during spraying.
According to the double-layer ceramic hydrophobic composite coating, due to the fact that the difference between the melting points of the fluorine-containing material and the ceramic material is large, a layer of ceramic coating is deposited firstly, wherein the ceramic powder adopts inner powder feeding, then the fluorine-containing material on the surface layer is deposited, and the fluorine-containing powder is added at the position which is 60-90mm away from a muzzle and is vertical to a flame center by utilizing a tool.
Preferably, the thermal spraying parameters of the invention are as follows: argon flow: 40-60L/min; hydrogen flow rate: 0.5-3.0L/min; current: 350-700A; voltage: 40-60V; powder feeding speed: 3-8V; spraying distance: 80-130 mm; moving speed of the thermal spray gun: 10 to 300 mm/s.
The principle of the invention is as follows: the coating and the substrate in the hydrophobic anti-corrosion coating material are basically combined mechanically; firstly, considering the hydrophobic characteristic of the fluorine-containing material, the contact area of a matrix and seawater in a marine environment is reduced, and meanwhile, marine organisms have the characteristic of difficult adhesion in the hydrophobic material, and secondly, the shape of the tissue surface of the thermal spraying coating is controllable, and the thermal spraying coating naturally forms a micro-nano embossed structure (figure 2) and has certain hydrophobic capacity, so that the corrosion resistance of the whole coating is improved. But the single fluorine-containing material has lower strength, is easy to break and fall off in the maintenance and use processes, and provides a corrosion condition for a corrosion environment, so that a ceramic material is added as a coating structure reinforcing phase to form a composite coating. On one hand, the coating can be ensured to have good hydrophobic performance, and the structural strength of the coating is improved.
The method can combine two materials with great property difference, namely the fluorine-containing material and the ceramic material, into a whole, the composite coating can form a good brick wall structure in the spraying process, the ceramic is used as the brick stone, the fluorine-containing material is used as the concrete, the coating part can react to generate a nano structure in situ, and meanwhile, the fluorine-containing material with lower hardness can reduce micro-nano cracks caused by collision of ceramic particles in the spraying process, so that the mechanical property and the corrosion resistance of the coating are further improved; the invention combines the high-flux technology to prepare the foundation and can also prepare the multi-component hydrophobic anti-corrosion coating.
The invention has the beneficial effects that:
the traditional preparation method is to paint a layer of organic or metal paint on the surface of a metal substrate, and the paint is used after being dried, the paint has low bonding strength and insufficient wear resistance, is easy to damage by impact to cause local corrosion of the substrate, needs regular maintenance and inspection, and has certain volatility and biotoxicity. According to the composite material consisting of the ceramic and the fluorine-containing material, the naturally formed embossed micro-nano structure is thermally sprayed by utilizing the hydrophobicity of the material, so that the contact area of the composite coating and a liquid corrosion medium and the material strength are improved, the corrosion rate of the coating is reduced, and the protection capability of the coating on metal parts in a corrosion environment is improved.
Drawings
FIG. 1 is a schematic representation of a thermally sprayed hydrophobic corrosion resistant coating;
FIG. 2 shows a micro-nano relief structure on the surface of a thermally sprayed hydrophobic corrosion-resistant coating.
Fig. 3 is a graph of the tensile strength of a thermally sprayed hydrophobic corrosion-resistant coating.
Detailed Description
The invention will be described in more detail with reference to the following figures and embodiments, but the scope of the invention is not limited thereto.
Example 1
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in the present example is Cu, Al2O3PTEE powder, wherein the Cu powder particle size is 58-75 μm, Al2O3The particle size of the powder is 45-58 mu m; mixing Al2O3And mechanically mixing the powder with PTEE powder uniformly according to the mass percentage of 75 percent and 25 percent, and drying the Cu and the mixed powder for 3 hours in a drying oven at the temperature of 80 ℃.
Selecting 45 steel as a spraying object, selecting 16-20 meshes of white corundum to carry out sand blasting and coarsening treatment on the spraying surface, and cleaning the surface by using dry compressed air.
Putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, and spraying Cu bonding layer parameters as follows: argon flow: 50L/min; hydrogen flow rate: 1.5L/min; current: 500A; voltage: 40V; powder feeding speed: 4V; spraying distance: 110 mm; moving speed of the thermal spray gun: 100mm/s, powder is fed in a gun.
Spray Al2O3The doped PTEE powder parameters were: argon flow: 56L/min; hydrogen flow rate: 1.7L/min; current: 550A; voltage: 45V, and (5); powder feeding speed: 6V; spraying distance: 90 mm; moving speed of the thermal spray gun: 50mm/s, and the distance between the powder feeding position and the muzzle is 10 mm. The overall thickness of the coating obtained was 400 μm, and the static contact angle was about: 143 deg., and the bonding strength of the coating is 12.2 Mpa.
Fig. 1 is a microstructure diagram of a surface of the thermal-spray hydrophobic corrosion-resistant coating prepared in this embodiment, and it can be seen from the microstructure that the surface has a micro-nano embossed structure.
Example 2
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in the embodiment is NiAl or ZrO2+20％Al2O3A PFA powder, wherein the NiAl powder has a particle size of 58-75 μm and ZrO2+20％Al2O3The particle size of the powder is 45-58 μm, and PFA powder is prepared into powder of 13-45 μm by granulation. ZrO 2 is mixed with2+20％Al2O3And PFA powder is mechanically and uniformly mixed with 80 percent and 20 percent of the PFA powder by mass percent, and NiAl and the mixed powder are put into a drying oven for drying for 3 hours at the temperature of 80 ℃.
Q235 steel is selected as a spraying object, 16-20 meshes of white corundum is selected to carry out sand blasting and coarsening treatment on the spraying surface, and dry compressed air is used for carrying out cleaning treatment on the surface.
Putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, wherein the parameters of spraying NiAl bonding layers are as follows: argon flow: 50L/min; hydrogen flow rate: 1.5L/min; current: 500A; voltage: 40V; powder feeding speed: 4V; spraying distance: 110 mm; moving speed of the thermal spray gun: 100mm/s, powder is fed in a gun.
Spray ZrO2+20％Al2O3The parameters of the doped PFA powder are: argon flow: 58L/min; hydrogen flow rate: 2.0L/min; current: 550A; voltage: 47V; powder feeding speed: 6V; spraying distance: 90 mm; moving speed of the thermal spray gun: 50mm/s, and the distance between the powder feeding position and the muzzle is 5 mm. The overall thickness of the coating obtained was 400 μm, and the static contact angle was about: 123 degrees and the bonding strength of the coating is 12.8 Mpa.
Example 3
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in the embodiment is NiCu, AT40 and PTEE powder, wherein the particle size of NiAl powder is 58-75 μm, the particle size of AT40 powder is 45-58 μm, and the particle size of PTEE powder is 25-45 μm. All powders were dried in a drying oven at 80 ℃ for 3 h.
Q235 steel is selected as a spraying object, 16-20 meshes of white corundum is selected to carry out sand blasting and coarsening treatment on the spraying surface, and dry compressed air is used for carrying out cleaning treatment on the surface.
Putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, wherein the parameters of spraying NiAl bonding layers are as follows: argon flow: 50L/min; hydrogen flow rate: 1.5L/min; current: 500A; voltage: 40V; powder feeding speed: 4V; spraying distance: 110 mm; moving speed of the thermal spray gun: 100mm/s, powder is fed in a gun.
The parameters of the sprayed AT40 powder and the PTEE powder are as follows: argon flow: 58L/min; hydrogen flow rate: 2.0L/min; current: 550A; voltage: 47V; powder feeding speed: 6V; spraying distance: 100 mm; moving speed of the thermal spray gun: 70mm/s, wherein AT40 powder is fed in a gun, and the powder feeding position of PTEE powder is 60mm away from the muzzle. The overall thickness of the coating obtained was 400 μm, and the static contact angle was about: 145 degrees and the bonding strength of the coating is 13.7 Mpa.
Example 4
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in the embodiment is NiCrAlY or Ti2AlN, PFA powder, wherein the particle size of NiCrAlY powder is 58-75 μm, Ti2AlN powder with a particle size of 30.8-38.5 μm and PFA powder with a particle size of 13-45 μm; all powders were dried in a drying oven at 80 ℃ for 3 h.
NiCrAlY steel is selected as a spraying object, white corundum with 16-20 meshes is selected to carry out sand blasting and coarsening treatment on the spraying surface, and the surface of the spraying object is cleaned by dry compressed air.
Putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, and spraying NiCrAlY bonding layer parameters as follows: argon flow: 55L/min; hydrogen flow rate: 1.5L/min; current: 550A; voltage: 42V; powder feeding speed: 4V; spraying distance: 100 mm; moving speed of the thermal spray gun: 100mm/s, powder is fed in a gun.
Spray AT13 powder and PFA powder parameters were: argon flow: 58L/min; hydrogen flow rate: 2.0L/min; current: 550A; voltage: 47V; powder feeding speed: 6V; spraying distance: 100 mm; moving speed of the thermal spray gun: 70mm/s of Ti2AlN powder is fed in a gun, and the distance between the powder feeding position of PFA powder and the muzzle is 90 mm; the overall thickness of the resulting coating was 420 μm, and the static contact angle was about: 141 DEG, the bonding strength of the coating is 14.1 MPa.
Example 5
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in this example is NiCr, TiO2PFA powder, wherein the NiAl powder has a particle size of 58-75 μm, TiO2The particle size of the powder is 30.8-38.5 μm, and the particle size of the PFA powder is 25-45 μm; TiO 22And PFA powder is mechanically and uniformly mixed with 75 percent and 25 percent of PFA powder by mass percent, and NiCr and the mixed powder are put into a drying oven for drying for 3 hours at the temperature of 80 ℃.
Selecting TC4 titanium alloy as a spraying object, selecting 16-20 meshes of white corundum to perform sand blasting and coarsening treatment on the spraying surface, and cleaning the surface by using dry compressed air.
Putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, and spraying NiCr bonding layer parameters as follows: argon flow: 53L/min; hydrogen flow rate: 1.5L/min; current: 520A; voltage: 40V; powder feeding speed: 3V; spraying distance: 90 mm; moving speed of the thermal spray gun: 300mm/s, powder is fed in a gun.
Spray TiO2The parameters of the doped PFA powder are: argon flow: 56L/min; hydrogen flow rate: 2.0L/min; current: 550A; voltage: 45V, and (5); powder feeding speed: 7V, and (3) adding water; spraying distance: 80 mm; moving speed of the thermal spray gun: 100mm/s, and the distance between the powder feeding position and the muzzle is 15 mm. The overall thickness of the coating obtained was 450 μm, and the static contact angle was about: 116 deg., and the bonding strength of the coating is 16.3 Mpa.
Example 6
A hydrophobic corrosion-resistant coating material and a preparation method thereof specifically comprise the following steps:
the spraying material used in this example was NiCrAl, WC + 10% Ti2AlC and PTEE powder, wherein the particle size of NiCrAl powder is 58-75 mu m, and WC + 10% Ti2The granularity of AlC powder is 30.8-38.5 mu m, and the granularity of PTEE powder is 25-45 mu m; WC + 10% Ti2Mechanically and uniformly mixing 80% and 20% of AlC and PTEE powder by mass percent, and drying the NiCrAl and the mixed powder in a drying oven at 80 ℃ for 3 h.
Selecting TC4 titanium alloy as a spraying object, selecting 16-20 meshes of white corundum to perform sand blasting and coarsening treatment on the spraying surface, and cleaning the surface by using dry compressed air.
And (3) putting the dried powder into thermal spraying powder feeding equipment in time, starting the thermal spraying equipment, and spraying NiCrAl bonding layer parameters as follows: argon flow: 53L/min; hydrogen flow rate: 1.5L/min; current: 520A; voltage: 40V; powder feeding speed: 3V; spraying distance: 90 mm; moving speed of the thermal spray gun: 120mm/s, powder is fed in a gun.
Spray coating of WC + 10% Ti2The parameters of AlC doped PTEE powder are as follows: argon flow: 56L/min; hydrogen flow rate: 2.0L/min; current: 550A; voltage: 45V, and (5); powder feeding speed: 7V, and (3) adding water; spraying distance: 80 mm; moving speed of the thermal spray gun: 50mm/s, and the distance between the powder feeding position and the muzzle is 20 mm; to obtainThe overall thickness of the coating was 450 μm and the static contact angle was about: 134 deg., and the bonding strength of the coating is 13.6 Mpa.
Claims (6)
1. A hydrophobic, corrosion-resistant coating material characterized by: the coating consists of a bottom bonding layer and a top ceramic hydrophobic composite layer;
the bonding layer comprises the following raw materials: one or more of AT40, NiAl, NiCu, NiCr, NiCrAl, NiMoAl, NiCrAlY, NiCoCrAlY, Cu;
the raw materials of the ceramic hydrophobic composite layer comprise a ceramic material and a fluorine-containing material, wherein the ceramic material accounts for 65-90 parts by weight, and the fluorine-containing material accounts for 10-35 parts by weight;
the ceramic material is Al2O3、ZrO2、TiO2、WC、Ti2AlC、Ti2One or more of AlN is/are mixed according to any proportion;
the fluorine-containing material is polytetrafluoroethylene powder or perfluoroalkoxy vinyl ether copolymer powder;
the ceramic hydrophobic composite layer is a single layer or double layers, and the single-layer ceramic hydrophobic composite coating is obtained by spraying a ceramic-doped fluorine-containing material; the double-layer ceramic hydrophobic composite coating is formed by depositing a ceramic coating and then depositing a fluorine-containing material on the surface layer.
2. The hydrophobic, corrosion-resistant coating material according to claim 1, characterized in that: the raw materials of the bonding layer and the ceramic material are powdery, and the particle size of the particles is 25-75 mu m; the fluorine-containing material is granulated by a granulator, and the particle size is kept between 13 and 45 mu m.
3. A process for the preparation of a hydrophobic, corrosion-resistant coating material according to claim 1 or 2, characterized in that: the method specifically comprises the following steps:
(1) physically roughening the metal matrix, and spraying a nickel-based bonding layer after cleaning;
(2) spraying a ceramic doped fluorine-containing material or spraying a ceramic wear-resistant layer and then spraying a fluorine-containing material to finally obtain a single-layer ceramic hydrophobic composite coating or a double-layer ceramic hydrophobic composite coating.
4. The method of preparing the hydrophobic, corrosion-resistant coating material of claim 3, wherein: the single-layer ceramic hydrophobic composite coating is sprayed by adopting mixed powder of ceramic-doped fluorine-containing materials, and the mixed powder is added at a position 5-20mm away from a gun mouth and perpendicular to a flame center according to the spraying power of a thermal spraying gun during spraying.
5. The method of preparing the hydrophobic, corrosion-resistant coating material of claim 3, wherein: the double-layer ceramic hydrophobic composite coating comprises the following components: firstly, a layer of ceramic coating is deposited, wherein the ceramic powder adopts inner powder feeding, then the fluorine-containing material on the surface layer is deposited, and the fluorine-containing powder is added at the position which is 60-90mm away from a muzzle and is vertical to a flame core by utilizing a tool.
6. The method of preparing the hydrophobic, corrosion-resistant coating material of claim 3, wherein: the thermal spraying parameters are as follows: argon flow: 40-60L/min; hydrogen flow rate: 0.5-3.0L/min; current: 350-700A; voltage: 40-60V; powder feeding speed: 3-8V; spraying distance: 80-130 mm; moving speed of the thermal spray gun: 10 to 300 mm/s.
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| CN114318207A (en) * | 2021-12-31 | 2022-04-12 | 西安交通大学 | Preparation method of metal alloy thermal barrier coating sprayed by atmosphere plasma and corresponding copper alloy base material |
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| CN115595579A (en) * | 2022-10-31 | 2023-01-13 | 中国地质大学（北京）（Cn） | Hydrophobic anti-icing coating on surface of front compression blade of engine and preparation method and application thereof |
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| CN115595579A (en) * | 2022-10-31 | 2023-01-13 | 中国地质大学（北京）（Cn） | Hydrophobic anti-icing coating on surface of front compression blade of engine and preparation method and application thereof |
| CN116871139A (en) * | 2023-07-10 | 2023-10-13 | 中铁二局集团有限公司 | Shield cutter head combined structure for resisting mud cake, preparation method and application |
| CN117105673A (en) * | 2023-10-24 | 2023-11-24 | 内蒙古工业大学 | Aluminum nitride complex phase ceramic and preparation method thereof |
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