CN116285606A - Water-based anticorrosive paint for welding points and preparation method thereof - Google Patents
Water-based anticorrosive paint for welding points and preparation method thereof Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 45
- 239000003973 paint Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 13
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 239000011347 resin Substances 0.000 claims abstract description 80
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000000945 filler Substances 0.000 claims abstract description 48
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 43
- 239000004917 carbon fiber Substances 0.000 claims abstract description 43
- 239000011230 binding agent Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 31
- 239000012700 ceramic precursor Substances 0.000 claims abstract description 29
- 239000000049 pigment Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 229920002050 silicone resin Polymers 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 229910001297 Zn alloy Inorganic materials 0.000 claims abstract description 4
- 239000000306 component Substances 0.000 claims abstract description 4
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 239000010937 tungsten Substances 0.000 claims abstract description 4
- 239000002243 precursor Substances 0.000 claims description 31
- 239000011256 inorganic filler Substances 0.000 claims description 22
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 22
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 13
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 12
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 10
- 239000002105 nanoparticle Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 229920003180 amino resin Polymers 0.000 claims description 8
- 239000002041 carbon nanotube Substances 0.000 claims description 8
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 125000003700 epoxy group Chemical group 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 239000011231 conductive filler Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000013556 antirust agent Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000412 polyarylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based anticorrosive paint for welding points and a preparation method thereof, wherein the water-based anticorrosive paint comprises carbon skeleton raw materials, high-temperature resistant resin, a binder component and pigment and filler; the carbon skeleton raw material comprises graphene and filament carbon fibers, wherein the mass ratio of the graphene to the filament carbon fibers is 3:2; the binder component comprises a conventional heat-conducting filler, a ceramic precursor binder and an auxiliary agent; the high temperature resistant resin comprises a composition of one or more of a poly aryl ethynyl resin, a silicone resin and polytetrafluoroethylene; the pigment filler comprises a metal pigment filler, and the metal pigment filler comprises a composition of one or more of copper powder, copper-zinc alloy powder and tungsten steel powder; the mass ratio of the carbon skeleton raw material to the high-temperature resistant resin to the binder component to the pigment and filler is 3:5:70:50, preparing a finished product by adopting a method of respectively feeding and stirring, and the invention has the advantage that the high temperature resistance and the reinforcement performance on the skeleton strength of graphene and filament carbon fibers can be fully utilized.
Description
Technical Field
The invention relates to the field of anti-corrosion paint, in particular to an aqueous anti-corrosion paint for welding points and a preparation method thereof.
Background
The losses due to corrosion, especially of metals, are very severe.
The adoption of the anti-corrosion coating can solve the problem of corrosion resistance of most metals, but for the positions needing to be welded, when the welding operation is carried out locally, the arc temperature is between 6 and 8 kilo DEG, the temperature of a molten pool is generally about 1700 ℃ on average, the average temperature of transitional molten drops can reach about 2300 ℃, the traditional anti-corrosion coating is difficult to bear such high temperature, and the local anti-corrosion coating is inevitably burnt during welding.
The conventional solution is to repair the anticorrosive paint on the welding spot after the welding spot is cooled, although the method can reconstruct the anticorrosive performance of the welding spot area, the anticorrosive material on the surface of the welding spot is ablated during welding, the metal surface is oxidized, a fine gap is left at the bottom of the welding spot, the fine gap exists on the surface of the welding spot even after polishing, the gap exists on the repaired anticorrosive paint layer, and long-term rust starts to be generated from the gap.
To solve this problem, it is desirable to prepare an aqueous corrosion resistant coating that is specific to the area of the weld.
Disclosure of Invention
The invention aims to: the invention aims to provide a water-based anticorrosive paint for welding points and a preparation method thereof, aiming at the defects of the prior art.
The technical scheme is as follows: the invention relates to an aqueous anticorrosive paint for welding points, which comprises carbon skeleton raw materials, high-temperature resistant resin, a binder component and pigment and filler;
the carbon skeleton raw material comprises graphene and filament carbon fibers, wherein the mass ratio of the graphene to the filament carbon fibers is 3:2;
the binder component comprises a conventional heat-conducting filler, a ceramic precursor binder and an auxiliary agent;
the high temperature resistant resin comprises a composition of one or more of a poly aryl ethynyl resin, a silicone resin and polytetrafluoroethylene;
the pigment filler comprises a metal pigment filler, and the metal pigment filler comprises a composition of one or more of copper powder, copper-zinc alloy powder and tungsten steel powder;
the mass ratio of the carbon skeleton raw material to the high-temperature resistant resin to the binder component to the pigment and filler is 3:5:70:50.
preferably, the ceramic precursor binder is prepared by adding micron-sized inorganic filler and nano-sized inorganic filler into a liquid polycarbosilazane precursor respectively, and uniformly mixing the micron-sized inorganic filler and the nano-sized inorganic filler, wherein the micron-sized inorganic filler is silicon carbide with the particle size of 10-50 mu m, and the nano-sized inorganic filler is carbon nano tube with the length of 20-50 nm.
Preferably, the auxiliary agent comprises isocyanate, pyridine, amino resin, resin with epoxy group, tetraisopropoxy titanium, anti-flash rust agent and silane coupling agent.
Preferably, the conventional heat conducting filler is one or a mixture of more of aluminum oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide, and when the conventional heat conducting filler is the same filler, a combination mode of multiple particle size ranges is adopted; alternatively, when the conventional heat conductive filler is in the same particle size range, a combination mode of various fillers of different types is selected.
Preferably, the high temperature resistant resin comprises a poly (arylene ethynyl) resin, a silicone resin, and polytetrafluoroethylene in a ratio of 4:1:1, and a mixture thereof.
The invention also provides a preparation method of the water-based anticorrosive paint for the welding points, which comprises the following steps:
s1, heating high-temperature resistant resin to a molten state, adding filament carbon fibers into the molten state high-temperature resistant resin, and uniformly dispersing the filament carbon fibers into the molten state high-temperature resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the prepared mixture into a heating stirrer, and simultaneously adding graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking a liquid polycarbosilazane precursor, firstly adding a nanoscale inorganic filler into the liquid polycarbosilazane precursor, uniformly dispersing the liquid polycarbosilazane precursor by adopting ultrasonic oscillation stirring, then adding a microscale inorganic filler, uniformly dispersing the liquid polycarbosilazane precursor by adopting a roller stirring mode, and preparing a ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into the mixture of the graphene and the filament carbon fibers which are prepared in the S2 and uniformly dispersed in the high-temperature resistant resin, adding the ceramic precursor binder, adding the conventional heat conducting filler and the auxiliary agent at a constant speed, and stirring to uniformly disperse the mixture;
and S5, finally adding metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
Compared with the prior art, the invention has the following beneficial effects: (1) The high-temperature-resistant welding wire has the advantages that graphene, filament carbon fibers and high-temperature-resistant resin are used as matrix materials, the high-temperature-resistant welding wire has excellent high-temperature resistance, when welding operation is performed, after the high-temperature-resistant resin is melted and destroyed at the high temperature of 1700 ℃, the graphene and the filament carbon fibers cannot be physically changed in the environment of 1700 ℃, the graphene and the filament carbon fibers can be kept stable and filled in gaps between welding points and a bottom metal surface, and meanwhile, the high-temperature-resistant resin can be used as a framework for resolidification after being cooled, so that the high-temperature-resistant performance is ensured, and meanwhile, the gaps between the welding points and the metal base surface after welding are fully filled, and subsequent corrosion is avoided;
(2) Graphene and filament carbon fibers are used as a framework, and when the water-based anti-corrosion coating is coated on the surface of a welding point, the thin seams on the surface of the welding point can be fully covered, so that corrosion at the seams is avoided;
(3) The ceramic precursor adhesive is adopted to be matched with a conventional heat-conducting filler to serve as a main component of an adhesive component, and graphene, filament carbon fiber and high-temperature-resistant resin can be matched to fully improve the overall high-temperature resistance.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate directional or positional relationships for convenience in describing the invention and simplifying the description, and do not indicate or imply that the devices or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; either directly, or indirectly, through intermediaries, may be in communication with each other, or may be in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
An aqueous anticorrosive paint for welding points comprises carbon skeleton raw materials, high-temperature resistant resin, a binder component and pigment and filler;
the carbon skeleton raw material comprises graphene and filament carbon fiber, wherein the mass ratio of the graphene to the filament carbon fiber is 3:2;
the binder component comprises conventional heat conducting filler, ceramic precursor binder and auxiliary agent;
the high temperature resistant resin comprises a composition of one or more of a poly (aryl ethynyl) resin, a silicone resin and polytetrafluoroethylene;
the pigment filler comprises a metal pigment filler, and the metal pigment filler comprises one or a combination of more of copper powder, copper zinc alloy powder and tungsten steel powder;
the mass ratio of the carbon skeleton raw material, the high-temperature resistant resin, the binder component and the pigment and filler is 3:5:70:50.
the technical scheme has the advantages that graphene, filament carbon fiber and high-temperature resistant resin are used as matrix materials, the matrix materials have excellent high-temperature resistance, when welding operation is carried out, after the polyarylene ethynyl resin, organic silicon resin and polytetrafluoroethylene serving as the high-temperature resistant resin are melted down at the high temperature of 1700 ℃, the graphene and the filament carbon fiber cannot be physically changed in the environment of 1700 ℃, the graphene and the filament carbon fiber can be kept stable and filled in a gap between a welding point and a bottom metal surface, and meanwhile, the matrix materials can be used as a framework for re-solidification after the high-temperature resistant resin is melted down, so that the high-temperature resistance is ensured, and meanwhile, the gap between the welding point and the metal base surface after welding is fully filled, and subsequent corrosion is avoided; graphene and filament carbon fibers are used as a framework, and when the water-based anti-corrosion coating is coated on the surface of a welding point, the thin seams on the surface of the welding point can be fully covered, so that corrosion at the seams is avoided; the ceramic precursor adhesive is adopted to be matched with a conventional heat-conducting filler to serve as a main component of an adhesive component, and graphene, filament carbon fiber and high-temperature-resistant resin can be matched to fully improve the overall high-temperature resistance.
In the specific implementation, the ceramic precursor adhesive is prepared by respectively adding micron-sized inorganic filler and nano-sized inorganic filler into a liquid polycarbosilazane precursor, and uniformly mixing the micron-sized inorganic filler and the nano-sized inorganic filler, wherein the micron-sized inorganic filler is silicon carbide with the particle size of 10-50 mu m, and the nano-sized inorganic filler is carbon nano tube with the length of 20-50 nm; the auxiliary agent comprises isocyanate, pyridine, amino resin, resin with epoxy groups, titanium tetraisopropoxide, an anti-flash rust agent and a silane coupling agent; the conventional heat conducting filler is one or a mixture of more of aluminum oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide, and when the conventional heat conducting filler is the same filler, a combination mode of various particle size ranges is adopted; or when the conventional heat conducting filler is in the same particle size range, selecting a combination mode of various fillers in different types; the high temperature resistant resin comprises poly (aryl ethynyl) resin, organic silicon resin and polytetrafluoroethylene with the following weight ratio of 4:1:1, and a mixture thereof.
The following are examples using this technical scheme and comparative examples, in which the parts of the substances mentioned in the examples and comparative examples are mass fractions.
Example 1: the preparation method of the water-based anticorrosive paint for the welding points comprises the following steps:
s1, 40 parts of poly aryl ethynyl resin, 40 parts of organic silicon resin and 12 parts of polytetrafluoroethylene are mixed according to the following ratio of 4:1:1, heating the mixed high-temperature-resistant resin in a proportion to a molten state, then adding 3 parts of filament carbon fibers into the molten state high-temperature-resistant resin, and then uniformly dispersing the filament carbon fibers into the molten state high-temperature-resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the mixture into a heating stirrer, and simultaneously adding 2 parts of graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking 6 parts of liquid polycarbosilazane precursor, firstly adding 2 parts of carbon nano tubes with the length of 20nm into the precursor, uniformly dispersing the precursor by adopting ultrasonic oscillation stirring, then adding 1 part of silicon carbide within the range of 10 mu m, and uniformly dispersing the precursor by adopting a roller stirring mode to prepare the ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into a mixture of graphene and filament carbon fibers which are prepared in the S2 and uniformly dispersed in high-temperature resistant resin, adding 2 parts of aluminum oxide, 0.7 part of isocyanate, 0.2 part of pyridine, 1 part of amino resin, 1 part of resin with epoxy groups, 0.6 part of tetraisopropoxide titanium, 0.2 part of anti-flash rust agent and 0.1 part of silane coupling agent at a uniform speed while adding the ceramic precursor binder, and stirring to uniformly disperse;
and S5, finally adding 20 parts of metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
Example 2: the preparation method of the water-based anticorrosive paint for the welding points comprises the following steps:
s1, 40 parts of poly aryl ethynyl resin, 40 parts of organic silicon resin and 12 parts of polytetrafluoroethylene are mixed according to the following ratio of 4:1:1, heating the mixed high-temperature-resistant resin in a proportion to a molten state, then adding 3 parts of filament carbon fibers into the molten state high-temperature-resistant resin, and then uniformly dispersing the filament carbon fibers into the molten state high-temperature-resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the mixture into a heating stirrer, and simultaneously adding 2 parts of graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking 6 parts of liquid polycarbosilazane precursor, firstly adding 2 parts of carbon nano tubes with the length of 50nm into the precursor, uniformly dispersing the precursor by adopting ultrasonic oscillation stirring, then adding 1 part of silicon carbide within the range of 50 mu m, and uniformly dispersing the precursor by adopting a roller stirring mode to prepare the ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into a mixture of graphene and filament carbon fibers which are prepared in the S2 and uniformly dispersed in high-temperature resistant resin, adding 1 part of zinc oxide, 1 part of aluminum nitride, 0.7 part of isocyanate, 0.2 part of pyridine, 1 part of amino resin, 1 part of resin with epoxy groups, 0.6 part of tetraisopropoxy titanium, 0.2 part of anti-rust agent and 0.1 part of silane coupling agent, and stirring to uniformly disperse the mixture;
and S5, finally adding 20 parts of metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
Example 3: the preparation method of the water-based anticorrosive paint for the welding points comprises the following steps:
s1, 40 parts of poly aryl ethynyl resin, 40 parts of organic silicon resin and 12 parts of polytetrafluoroethylene are mixed according to the following ratio of 4:1:1, heating the mixed high-temperature-resistant resin in a proportion to a molten state, then adding 3 parts of filament carbon fibers into the molten state high-temperature-resistant resin, and then uniformly dispersing the filament carbon fibers into the molten state high-temperature-resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the mixture into a heating stirrer, and simultaneously adding 2 parts of graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking 6 parts of liquid polycarbosilazane precursor, firstly adding 2 parts of carbon nano tube with the length of 38nm into the precursor, uniformly dispersing the precursor by adopting ultrasonic oscillation stirring, then adding 1 part of silicon carbide within the range of 25 mu m, and uniformly dispersing the precursor by adopting a roller stirring mode to prepare the ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into a mixture of graphene and filament carbon fibers which are prepared in the S2 and uniformly dispersed in high-temperature resistant resin, adding 1 part of boron nitride, 1 part of silicon carbide, 0.7 part of isocyanate, 0.2 part of pyridine, 1 part of amino resin, 1 part of resin with epoxy groups, 0.6 part of tetraisopropoxide titanium, 0.2 part of anti-rust agent and 0.1 part of silane coupling agent, and stirring to uniformly disperse the mixture;
and S5, finally adding 20 parts of metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
Comparative example 1: the preparation method of the water-based anticorrosive paint for the welding points comprises the following steps:
s1, heating epoxy resin to a molten state, adding filament carbon fibers into the molten state high-temperature-resistant resin, and uniformly dispersing the filament carbon fibers into the molten state high-temperature-resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the mixture into a heating stirrer, and simultaneously adding graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking a liquid polycarbosilazane precursor, firstly adding a carbon nano tube with the length of 20-50 nm into the liquid polycarbosilazane precursor, uniformly dispersing the liquid polycarbosilazane precursor by adopting ultrasonic oscillation stirring, then adding silicon carbide within the range of 10-50 mu m, and uniformly dispersing the liquid polycarbosilazane precursor by adopting a roller stirring mode to prepare the ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into the mixture prepared in the step S2, uniformly dispersing, adding isocyanate, pyridine, amino resin, epoxy resin, tetraisopropoxide titanium, an anti-flash rust agent and a silane coupling agent at uniform speed while adding the ceramic precursor binder, and stirring to uniformly disperse;
and S5, finally adding metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
Comparative example 2: the preparation method of the water-based anticorrosive paint for the welding points comprises the following steps:
s1, mixing poly aryl ethynyl resin, organic silicon resin and polytetrafluoroethylene with the following weight ratio of 4:1:1, heating the high-temperature resistant resin mixed in proportion to a molten state;
s2, taking a liquid polycarbosilazane precursor, firstly adding a carbon nano tube with the length of 20-50 nm into the liquid polycarbosilazane precursor, uniformly dispersing the liquid polycarbosilazane precursor by adopting ultrasonic oscillation stirring, then adding silicon carbide within the range of 10-50 mu m, and uniformly dispersing the liquid polycarbosilazane precursor by adopting a roller stirring mode to prepare the ceramic precursor binder;
s3, adding the prepared ceramic precursor binder into the molten high-temperature resistant resin and uniformly dispersing, adding isocyanate, pyridine, amino resin, epoxy resin, tetraisopropoxide titanium, an anti-flash rust agent and a silane coupling agent into the ceramic precursor binder at a uniform speed, and stirring to uniformly disperse the ceramic precursor binder;
and S5, finally adding metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
The anticorrosive paint finished products prepared in the examples, the comparative examples 1 and 2 are adopted, metal surface coating, welding, secondary coating operation after welding are carried out, test samples are prepared, and three test samples are placed into an aging cabin in a high-humidity high-salt high-temperature environment for aging corrosion test, and the corrosion occurrence time is compared, so that the following results are obtained:
| etching time (h) | |
| Example 1 | 817 |
| Example 2 | 809 |
| Example 3 | 812 |
| Comparative example 1 | 588 |
| Comparative example 2 | 439 |
It follows that, to achieve an anticorrosive coating meeting the requirements of the welding points, the poly (arylene-ethynyl) resin, the silicone resin and the polytetrafluoroethylene are mixed in a ratio of 4:1:1, the high temperature resistant resin, the graphene and the filament carbon fiber which are mixed in proportion are all essential components.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is at a lower level than the second feature. In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example.
Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. An aqueous anticorrosive paint for welding points is characterized in that: comprises a carbon skeleton raw material, high-temperature resistant resin, a binder component and pigment and filler;
the carbon skeleton raw material comprises graphene and filament carbon fibers, wherein the mass ratio of the graphene to the filament carbon fibers is 3:2;
the binder component comprises a conventional heat-conducting filler, a ceramic precursor binder and an auxiliary agent;
the high temperature resistant resin comprises a composition of one or more of a poly aryl ethynyl resin, a silicone resin and polytetrafluoroethylene;
the pigment filler comprises a metal pigment filler, and the metal pigment filler comprises a composition of one or more of copper powder, copper-zinc alloy powder and tungsten steel powder;
the mass ratio of the carbon skeleton raw material to the high-temperature resistant resin to the binder component to the pigment and filler is 3:5:70:50.
2. the aqueous anticorrosive paint for welding points according to claim 1, wherein: the ceramic precursor adhesive is prepared by respectively adding micron-sized inorganic filler and nano-sized inorganic filler into a liquid polycarbosilazane precursor, and uniformly mixing the micron-sized inorganic filler and the nano-sized inorganic filler, wherein the micron-sized inorganic filler is silicon carbide with the particle size of 10-50 mu m, and the nano-sized inorganic filler is carbon nano tube with the length of 20-50 nm.
3. The aqueous anticorrosive paint for welding points according to claim 1, wherein: the auxiliary agent comprises isocyanate, pyridine, amino resin, resin with epoxy groups, titanium tetraisopropoxide, an anti-flash rust agent and a silane coupling agent.
4. The aqueous anticorrosive paint for welding points according to claim 1, wherein: the conventional heat conducting filler is one or a mixture of more of aluminum oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide, and when the conventional heat conducting filler is the same filler, a combination mode of multiple particle size ranges is adopted; alternatively, when the conventional heat conductive filler is in the same particle size range, a combination mode of various fillers of different types is selected.
5. The aqueous anticorrosive paint for welding points according to claim 1, wherein: the high temperature resistant resin comprises poly aryl ethynyl resin, organic silicon resin and polytetrafluoroethylene in a ratio of 4:1:1, and a mixture thereof.
6. A method for preparing an aqueous anticorrosive paint for welding points according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
s1, heating high-temperature resistant resin to a molten state, adding filament carbon fibers into the molten state high-temperature resistant resin, and uniformly dispersing the filament carbon fibers into the molten state high-temperature resistant resin by adopting an ultrasonic vibration stirrer;
s2, uniformly dispersing the filament carbon fibers in the high-temperature-resistant resin, and then placing the prepared mixture into a heating stirrer, and simultaneously adding graphene and continuously stirring until the mixture is uniformly dispersed;
s3, taking a liquid polycarbosilazane precursor, firstly adding a nanoscale inorganic filler into the liquid polycarbosilazane precursor, uniformly dispersing the liquid polycarbosilazane precursor by adopting ultrasonic oscillation stirring, then adding a microscale inorganic filler, uniformly dispersing the liquid polycarbosilazane precursor by adopting a roller stirring mode, and preparing a ceramic precursor binder;
s4, adding the prepared ceramic precursor binder into the mixture of the graphene and the filament carbon fibers which are prepared in the S2 and uniformly dispersed in the high-temperature resistant resin, adding the ceramic precursor binder, adding the conventional heat conducting filler and the auxiliary agent at a constant speed, and stirring to uniformly disperse the mixture;
and S5, finally adding metal pigment and filler, uniformly stirring, and cooling to obtain a finished product.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107652843A (en) * | 2017-10-18 | 2018-02-02 | 哈尔滨金纳科技有限公司 | A kind of preparation method of CNT composite graphite alkene anticorrosive paint |
| CN108893009A (en) * | 2018-07-24 | 2018-11-27 | 宁波蒙曼生物科技有限公司 | A kind of high temperature resistance high heat conduction non-viscous paint and its preparation method and application |
| CN111057438A (en) * | 2019-11-27 | 2020-04-24 | 广东阿尔法工程材料有限公司 | Graphene-based high-temperature-resistant anticorrosive paint and preparation method thereof |
| CN111808463A (en) * | 2020-07-29 | 2020-10-23 | 深圳市寒暑科技新能源有限公司 | High-temperature electric heating coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107652843A (en) * | 2017-10-18 | 2018-02-02 | 哈尔滨金纳科技有限公司 | A kind of preparation method of CNT composite graphite alkene anticorrosive paint |
| CN108893009A (en) * | 2018-07-24 | 2018-11-27 | 宁波蒙曼生物科技有限公司 | A kind of high temperature resistance high heat conduction non-viscous paint and its preparation method and application |
| CN111057438A (en) * | 2019-11-27 | 2020-04-24 | 广东阿尔法工程材料有限公司 | Graphene-based high-temperature-resistant anticorrosive paint and preparation method thereof |
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