CN111892857A - Industrial pipeline anticorrosion powder coating and preparation method thereof - Google Patents
Industrial pipeline anticorrosion powder coating and preparation method thereof Download PDFInfo
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- 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
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Abstract
An industrial pipeline anticorrosion powder coating comprises the following components in percentage by weight: 65-70% of epoxy resin, 5-7% of curing agent, 5-8% of graphene and 10-15% of barrier powder filler. The flaky filler wet-process sericite powder with the barrier effect forms basically parallel orientation arrangement in a paint film, water and other corrosive substances are strongly blocked from permeating the paint film, so that the paint film has a good barrier effect, the added silica powder can fill up arrangement gaps among wet-process sericite powder sheets, the barrier effect is enhanced, and the silica powder also has remarkable anti-permeability and anti-corrosion effects; according to the invention, the heat resistance and corrosion resistance of the epoxy resin powder coating can be effectively improved by grafting the graphene component; the graphene component has strong adsorption capacity, and can firmly adsorb wet-process sericite powder and needle-shaped silicon micro powder on the surface of metal, so that the whole coating has strong adhesive force.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and particularly relates to an industrial pipeline anticorrosion powder coating and a preparation method thereof.
Background
The powder coating is a solid powder synthetic resin coating composed of solid resin, pigment, filler and assistant, and is different from ordinary solvent-type coating and water-based coating, and its dispersion medium is not solvent and water, but air, and it has the features of no solvent pollution, hundreds of film forming and low energy consumption. Therefore, powder coatings are the coatings of major development for environmentally friendly coating products. However, the existing epoxy resin powder coating has some defects in the aspects of heat resistance and corrosion resistance, and cannot meet the corrosion prevention requirement of industrial pipelines operating in severe environments, so that the components of the traditional epoxy resin powder coating need to be improved to obtain better heat resistance, corrosion resistance and adhesion, and the traditional epoxy resin powder coating can be better suitable for the operating environment of industrial pipelines.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an industrial pipeline anticorrosive powder coating and a preparation method thereof, and the specific technical scheme is as follows:
an industrial pipeline anticorrosion powder coating comprises the following components in percentage by weight: 65-70% of epoxy resin, 5-7% of curing agent, 5-8% of graphene and 10-15% of barrier powder filler.
Further, the barrier powder filler is wet sericite powder, silicon micropowder, and the weight ratio of 2: 1 by weight ratio.
Further, the graphene and the barrier powder filler are both modified by a silane coupling agent.
Further, the curing agent is an amine curing agent.
A preparation method of an industrial pipeline anticorrosion powder coating comprises the following steps:
s1, preparation of a silane coupling agent solution:
mixing and stirring a silane coupling agent, absolute ethyl alcohol and deionized water according to a mass ratio of (15-20) to (60-70) to (8-10) until the mixture is clear, and standing to obtain a silane coupling agent solution;
s2, graphene modification treatment:
firstly, ultrasonically dispersing graphene in deionized water to obtain a graphene dispersion liquid, then placing the graphene dispersion liquid in a reaction kettle, adding the silane coupling agent solution obtained in the step S1, heating and stirring for 60-120 min, keeping the stirring temperature at 70-85 ℃, continuously stirring and cooling to room temperature to obtain a modified graphene solution;
s3, modification treatment of the barrier powder filler:
firstly, sequentially adding wet-process sericite powder and silicon micropowder in the barrier powder filler into a high-speed stirrer according to the proportion in the claim 2, fully mixing at a high speed for 30min at 80-90 ℃, then atomizing and spraying the silane coupling agent solution obtained in the step of S1 into the high-speed stirrer, keeping the temperature for fully mixing at a high speed for 30min, stopping stirring and cooling to room temperature to obtain the modified barrier powder filler;
s4, preparing a modified compound of graphene and barrier powder filler:
adding the modified barrier powder filler obtained in the step S3 into the modified graphene solution obtained in the step S2 while stirring, preserving heat, mixing and stirring at 50-60 ℃, reacting for 30-60 min, cooling to room temperature after the reaction is finished, and then washing, filtering, drying, crushing and sieving to obtain a modified composite of graphene and the barrier powder filler;
s5, preparing the graphene modified powder coating:
according to the proportion in the claim 1, the modified compound of graphene and barrier powder filler obtained in the step S4 and epoxy resin are stirred and mixed uniformly, then curing agent with proportion is added, the mixture is stirred and mixed uniformly to obtain premixed material powder, then the premixed material powder is put into an extruder to be subjected to melt extrusion, cooling and chopping into flakes, and the obtained flakes are ground, sieved and discharged to obtain the graphene modified powder coating.
Furthermore, the particle sizes of the wet-process sericite powder and the silicon micropowder in the barrier powder filler are 1250 meshes.
Further, the silane coupling agent is one or two of gamma-aminopropyl triethoxysilane and gamma-methacryloxypropyl trimethoxysilane.
The invention has the beneficial effects that:
the flaky filler wet-process sericite powder with the barrier effect forms basically parallel orientation arrangement in a paint film, water and other corrosive substances are strongly blocked from permeating the paint film, so that the paint film has a good barrier effect, the added silica powder can fill up arrangement gaps among wet-process sericite powder sheets, the barrier effect is enhanced, and the silica powder also has remarkable anti-permeability and anti-corrosion effects; according to the preparation method, graphene and barrier powder filler are subjected to wet-process and dry-process coupling modification respectively, the modified graphene and the barrier powder filler are subjected to physical mixing reaction, and a modified compound of the graphene and the barrier powder filler is obtained after a series of steps of washing, filtering, drying, crushing and sieving; the modified compound of graphene and barrier powder filler prepared by the two-step method has high compatibility with epoxy resin and strong binding force, and can be better fused into the whole powder coating after the curing agent is added for crosslinking and curing to form a uniform and stable compound; according to the invention, the heat resistance and corrosion resistance of the epoxy resin powder coating can be effectively improved by grafting the graphene component; the graphene component has strong adsorption capacity, and can firmly adsorb wet-process sericite powder and needle-shaped silicon micro powder on the surface of metal, so that the whole coating has strong adhesive force.
Drawings
Fig. 1 is an electron microscope comparative photograph of a powder coating (a) to which a barrier powder filler is added but no graphene is added and a powder coating (b) to which graphene and a barrier powder filler are added.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the application provides the industrial pipeline anticorrosion powder coating and the preparation method thereof, the flaky filler wet-process sericite powder with the barrier effect is utilized to form basically parallel orientation arrangement in a paint film, the penetration of water and other corrosive substances to the paint film is strongly blocked, the coating has good barrier effect, the added silicon micro powder can fill up arrangement gaps among wet-process sericite powder sheets, the barrier effect is enhanced, and the silicon micro powder also has remarkable anti-permeability and anticorrosion effects; the method comprises the steps of firstly, separately carrying out wet method and dry method coupling modification on graphene and barrier powder filler, then carrying out physical mixing reaction on the modified graphene and the barrier powder filler, and carrying out a series of steps of washing, filtering, drying, crushing and sieving to obtain a modified compound of the graphene and the barrier powder filler; the modified compound of graphene and barrier powder filler prepared by the two-step method has high compatibility with epoxy resin and strong binding force, and can be better fused into the whole powder coating after the curing agent is added for crosslinking and curing to form a uniform and stable compound; according to the application, the heat resistance and the corrosion resistance of the epoxy resin powder coating can be effectively improved by grafting the graphene component; the graphene component has strong adsorption capacity, and can firmly adsorb wet-process sericite powder and needle-shaped silicon micro powder on the metal surface, so that the whole coating has strong adhesive force.
In order to solve the above problems, the technical solution in the embodiment of the present application has the following general idea:
the graphene is a two-dimensional carbon atom sheet formed by hybridized carbon atoms, and the carbon atoms are in a hexagonal honeycomb shape; the graphene is characterized by being formed by a layer of carbon atoms and endowed with various properties, for example, graphene has excellent properties of high temperature resistance, corrosion resistance and the like; based on the well-known excellent performance of graphene, researchers add graphene as a reinforcement into powder coatings to improve the performance of the powder coatings in terms of high temperature resistance and corrosion resistance.
Due to the fact that the graphene material is large in specific surface area and interaction is easy to occur between the sheet layers, agglomeration is easy to occur, graphene aggregate not only reduces self adsorption capacity but also hinders the exertion of excellent performance of graphene, and therefore graphene is subjected to ultrasonic dispersion in deionized water at first and then is modified by the silane coupling agent in a wet environment, and the compatibility of graphene and epoxy resin is enhanced.
Sericite is natural fine-grained muscovite, is silicate with a layered structure, can be split into extremely thin sheets, the thickness of each sheet can reach below 1 mu m, the diameter-thickness ratio is large, the wear resistance and the wear resistance are good, the heat resistance and the insulation are realized, the sericite is insoluble in acid-base solution, and the chemical property is stable; compared with the common dry-method sericite powder, the wet-method sericite powder has high purity and can better play the lamellar barrier effect; the silicon micropowder can effectively fill up the lamellar gaps of the sericite powder, and the silicon micropowder and the sericite powder can form an excellent barrier in cooperation, so that the sericite powder has anti-permeability and anti-corrosion effects.
Because sericite powder and silicon micropowder are inorganic powder fillers and epoxy resin are poor in compatibility, coupling modification treatment needs to be carried out on the inorganic powder fillers, however, how to better disperse and fuse the two inorganic powder fillers and graphene needs to be carried out in two steps: firstly, carrying out wet modification and dry modification on graphene and powder filler respectively; and secondly, putting the inorganic powder filler modified by the dry method into the graphene solution modified by the wet method, carrying out temperature-controlled physical mixing reaction on the inorganic powder filler and the graphene solution to form a uniform solution system, and carrying out a series of steps of washing, filtering, drying, crushing and sieving to obtain the modified compound of the graphene and the inorganic powder filler.
The curing action of the amine curing agent on the epoxy resin is to open an epoxy group by active hydrogen on a nitrogen atom so as to crosslink and cure the epoxy resin; the amine curing agent can effectively improve the heat resistance and corrosion resistance of the product, and can also improve the impact resistance and shear strength of the product.
Both the gamma-aminopropyltriethoxysilane and the gamma-methacryloxypropyltrimethoxysilane are colorless transparent liquids, can be dissolved in water and hydrolyzed in water, are used for coupling organic polymers and inorganic materials, enhance the cohesiveness and compatibility of the organic polymers and improve the mechanical, water-resistant, ageing-resistant and other properties of the product.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
An industrial pipeline anticorrosion powder coating comprises the following components in percentage by weight: 65% of epoxy resin, 5% of curing agent, 5% of graphene and 10% of barrier powder filler.
The barrier powder filler is wet sericite powder, silicon micropowder in a ratio of 2: 1 by weight ratio.
And the graphene and the barrier powder filler are both subjected to modification treatment by a silane coupling agent.
The curing agent is an amine curing agent.
A preparation method of an industrial pipeline anticorrosion powder coating comprises the following steps:
s1, preparation of a silane coupling agent solution:
mixing and stirring a silane coupling agent, absolute ethyl alcohol and deionized water according to a mass ratio of 15:60:8 until the mixture is clear, and standing to obtain a silane coupling agent solution;
s2, graphene modification treatment:
firstly, ultrasonically dispersing graphene in deionized water to obtain a graphene dispersion liquid, then placing the graphene dispersion liquid in a reaction kettle, adding the silane coupling agent solution obtained in the step S1, heating and stirring for 60min, keeping the stirring temperature at 70 ℃, continuously stirring and cooling to room temperature to obtain a modified graphene solution;
s3, modification treatment of the barrier powder filler:
firstly, sequentially adding wet-process sericite powder and silicon micropowder in the barrier powder filler into a high-speed stirrer according to the proportion, fully mixing at a high speed for 30min at 80 ℃, then atomizing and spraying the silane coupling agent solution obtained in the step S1 into the high-speed stirrer, keeping the temperature, fully mixing at a high speed for 30min, stopping stirring and cooling to room temperature to obtain the modified barrier powder filler;
s4, preparing a modified compound of graphene and barrier powder filler:
adding the modified barrier powder filler obtained in the step S3 into the modified graphene solution obtained in the step S2 while stirring, preserving heat, mixing and stirring at 50 ℃, reacting for 30min, cooling to room temperature after the reaction is finished, and then washing, filtering, drying, crushing and sieving to obtain a modified composite of graphene and the barrier powder filler;
s5, preparing the graphene modified powder coating:
according to the proportion, the modified compound of the graphene and the barrier powder filler obtained in the step S4 and the epoxy resin are stirred and mixed uniformly, then the curing agent with the proportion is added, the mixture is stirred and mixed uniformly to obtain premixed material powder, then the premixed material powder is put into an extruder to be subjected to melt extrusion, cooling and chopping to obtain sheet materials, and the obtained sheet materials are ground, sieved and discharged to obtain the graphene modified powder coating.
The particle sizes of the wet-process sericite powder and the silicon micro powder in the barrier powder filler are 1250 meshes.
The silane coupling agent is one or two of gamma-aminopropyl triethoxysilane and gamma-methacryloxypropyl trimethoxysilane.
Example two
An industrial pipeline anticorrosion powder coating comprises the following components in percentage by weight: 67.5% of epoxy resin, 6% of curing agent, 6.5% of graphene and 12.5% of barrier powder filler.
The barrier powder filler is wet sericite powder, silicon micropowder in a ratio of 2: 1 by weight ratio.
And the graphene and the barrier powder filler are both subjected to modification treatment by a silane coupling agent.
The curing agent is an amine curing agent.
A preparation method of an industrial pipeline anticorrosion powder coating comprises the following steps:
s1, preparation of a silane coupling agent solution:
mixing and stirring a silane coupling agent, absolute ethyl alcohol and deionized water according to a mass ratio of 17.5:65:9 until the mixture is clear, and standing to obtain a silane coupling agent solution;
s2, graphene modification treatment:
firstly, ultrasonically dispersing graphene in deionized water to obtain a graphene dispersion liquid, then placing the graphene dispersion liquid in a reaction kettle, adding the silane coupling agent solution obtained in the step S1, heating and stirring for 90min, keeping the stirring temperature at 77.5 ℃, continuously stirring and cooling to room temperature to obtain a modified graphene solution;
s3, modification treatment of the barrier powder filler:
firstly, sequentially adding wet-process sericite powder and silicon micropowder in the barrier powder filler into a high-speed stirrer according to the proportion, fully mixing at 85 ℃ for 30min at a high speed, then atomizing and spraying the silane coupling agent solution obtained in the step S1 into the high-speed stirrer, keeping the temperature, fully mixing at the high speed for 30min, stopping stirring, and cooling to room temperature to obtain the modified barrier powder filler;
s4, preparing a modified compound of graphene and barrier powder filler:
adding the modified barrier powder filler obtained in the step S3 into the modified graphene solution obtained in the step S2 while stirring, preserving heat, mixing and stirring for reaction for 45min at 55 ℃, cooling to room temperature after the reaction is finished, and then washing, filtering, drying, crushing and sieving to obtain a modified composite of graphene and the barrier powder filler;
s5, preparing the graphene modified powder coating:
according to the proportion, the modified compound of the graphene and the barrier powder filler obtained in the step S4 and the epoxy resin are stirred and mixed uniformly, then the curing agent with the proportion is added, the mixture is stirred and mixed uniformly to obtain premixed material powder, then the premixed material powder is put into an extruder to be subjected to melt extrusion, cooling and chopping to obtain sheet materials, and the obtained sheet materials are ground, sieved and discharged to obtain the graphene modified powder coating.
The particle sizes of the wet-process sericite powder and the silicon micro powder in the barrier powder filler are 1250 meshes.
The silane coupling agent is one or two of gamma-aminopropyl triethoxysilane and gamma-methacryloxypropyl trimethoxysilane.
EXAMPLE III
An industrial pipeline anticorrosion powder coating comprises the following components in percentage by weight: 70% of epoxy resin, 7% of curing agent, 8% of graphene and 15% of barrier powder filler.
The barrier powder filler is wet sericite powder, silicon micropowder in a ratio of 2: 1 by weight ratio.
And the graphene and the barrier powder filler are both subjected to modification treatment by a silane coupling agent.
The curing agent is an amine curing agent.
A preparation method of an industrial pipeline anticorrosion powder coating comprises the following steps:
s1, preparation of a silane coupling agent solution:
mixing and stirring a silane coupling agent, absolute ethyl alcohol and deionized water according to a mass ratio of 20:70:10 until the mixture is clear, and standing to obtain a silane coupling agent solution;
s2, graphene modification treatment:
firstly, ultrasonically dispersing graphene in deionized water to obtain a graphene dispersion liquid, then placing the graphene dispersion liquid in a reaction kettle, adding the silane coupling agent solution obtained in the step S1, heating and stirring for 120min, keeping the stirring temperature at 85 ℃, continuously stirring and cooling to room temperature to obtain a modified graphene solution;
s3, modification treatment of the barrier powder filler:
firstly, sequentially adding wet-process sericite powder and silicon micropowder in the barrier powder filler into a high-speed stirrer according to the proportion, fully mixing at a high speed for 30min at 90 ℃, then atomizing and spraying the silane coupling agent solution obtained in the step S1 into the high-speed stirrer, keeping the temperature, fully mixing at a high speed for 30min, stopping stirring and cooling to room temperature to obtain the modified barrier powder filler;
s4, preparing a modified compound of graphene and barrier powder filler:
adding the modified barrier powder filler obtained in the step S3 into the modified graphene solution obtained in the step S2 while stirring, preserving heat, mixing and stirring at 60 ℃, reacting for 60min, cooling to room temperature after the reaction is finished, and then washing, filtering, drying, crushing and sieving to obtain a modified compound of graphene and the barrier powder filler;
s5, preparing the graphene modified powder coating:
according to the proportion, the modified compound of the graphene and the barrier powder filler obtained in the step S4 and the epoxy resin are stirred and mixed uniformly, then the curing agent with the proportion is added, the mixture is stirred and mixed uniformly to obtain premixed material powder, then the premixed material powder is put into an extruder to be subjected to melt extrusion, cooling and chopping to obtain sheet materials, and the obtained sheet materials are ground, sieved and discharged to obtain the graphene modified powder coating.
The particle sizes of the wet-process sericite powder and the silicon micro powder in the barrier powder filler are 1250 meshes.
The silane coupling agent is one or two of gamma-aminopropyl triethoxysilane and gamma-methacryloxypropyl trimethoxysilane.
GB/T1735-2009, GB/T1771-2007 and CJ/T120-2008 are adopted for product performance detection, the powder coating and the common comparative powder coating are respectively sprayed on the surfaces of the same metal round tubes, sample pieces are manufactured according to the same process conditions, and performance test data of the sample pieces are shown in Table 1.
TABLE 1
| Test items | Example one | Example two | EXAMPLE III | Comparative example |
| Salt spray resistance/hr | 550 | 570 | 600 | 420 |
| High temperature resistance/. degree.C | 520 | 530 | 550 | 400 |
| Adhesion grade | Grade 3 | Stage 2 | Stage 2 | 4 stage |
Remarking: class 1- -the coating is clearly not able to be pried off;
class 2- -is pried away to a coating of less than or equal to 50%;
class 3- -the coating that is prised off is greater than 50%, but the coating exhibits significant prising resistance;
level 4- -the coating is easily pried into strips or large fragments;
grade 5- -the coating is stripped off in one piece.
As can be seen from the above Table 1, the salt spray resistance and the high temperature resistance of the invention are remarkably improved compared with those of the comparative example; in the powder coating system, as the content of graphene is increased in the first to third examples, the salt spray resistance and the high temperature resistance of the material are in an increasing linear relationship; according to the invention, the adhesion detection method in CJ/T120-2008 standard tests that the coating surface is unchanged and the adhesion level can still reach 1-3 levels in long-term boiling test, thereby improving the corrosion resistance of the sample.
As can be seen from fig. 1, the sericite powder in the coating of the powder coating (a) to which the barrier powder filler is added but the graphene is not added is not tightly bonded, and the sericite powder in the coating of the powder coating (b) to which the graphene and the barrier powder filler are added is relatively tightly bonded, which indicates that the graphene has an adsorption effect on the barrier powder filler.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The industrial pipeline anticorrosion powder coating is characterized by comprising the following components in percentage by weight: 65-70% of epoxy resin, 5-7% of curing agent, 5-8% of graphene and 10-15% of barrier powder filler.
2. The industrial pipeline anticorrosion powder coating of claim 1, wherein the barrier powder filler is wet-process sericite powder, silica micropowder in a ratio of 2: 1 by weight ratio.
3. The industrial pipeline anticorrosion powder coating of claim 2, wherein the graphene and the barrier powder filler are both modified by a silane coupling agent.
4. The industrial pipeline anticorrosive powder coating as claimed in claim 1, wherein the curing agent is an amine curing agent.
5. The preparation method of the industrial pipeline anticorrosive powder coating is characterized by comprising the following steps:
s1, preparation of a silane coupling agent solution:
mixing and stirring a silane coupling agent, absolute ethyl alcohol and deionized water according to a mass ratio of (15-20) to (60-70) to (8-10) until the mixture is clear, and standing to obtain a silane coupling agent solution;
s2, graphene modification treatment:
firstly, ultrasonically dispersing graphene in deionized water to obtain a graphene dispersion liquid, then placing the graphene dispersion liquid in a reaction kettle, adding the silane coupling agent solution obtained in the step S1, heating and stirring for 60-120 min, keeping the stirring temperature at 70-85 ℃, continuously stirring and cooling to room temperature to obtain a modified graphene solution;
s3, modification treatment of the barrier powder filler:
firstly, sequentially adding wet-process sericite powder and silicon micropowder in the barrier powder filler into a high-speed stirrer according to the proportion in the claim 2, fully mixing at a high speed for 30min at 80-90 ℃, then atomizing and spraying the silane coupling agent solution obtained in the step of S1 into the high-speed stirrer, keeping the temperature for fully mixing at a high speed for 30min, stopping stirring and cooling to room temperature to obtain the modified barrier powder filler;
s4, preparing a modified compound of graphene and barrier powder filler:
adding the modified barrier powder filler obtained in the step S3 into the modified graphene solution obtained in the step S2 while stirring, preserving heat, mixing and stirring at 50-60 ℃, reacting for 30-60 min, cooling to room temperature after the reaction is finished, and then washing, filtering, drying, crushing and sieving to obtain a modified composite of graphene and the barrier powder filler;
s5, preparing the graphene modified powder coating:
according to the proportion in the claim 1, the modified compound of graphene and barrier powder filler obtained in the step S4 and epoxy resin are stirred and mixed uniformly, then curing agent with proportion is added, the mixture is stirred and mixed uniformly to obtain premixed material powder, then the premixed material powder is put into an extruder to be subjected to melt extrusion, cooling and chopping into flakes, and the obtained flakes are ground, sieved and discharged to obtain the graphene modified powder coating.
6. The preparation method of the industrial pipeline anticorrosion powder coating as claimed in claim 5, wherein the wet-process sericite powder and the silica micropowder in the barrier powder filler have a particle size of 1250 meshes.
7. The method for preparing the industrial pipeline anticorrosion powder coating as claimed in claim 5, wherein the silane coupling agent is one or two of gamma-aminopropyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
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| CN113150652A (en) * | 2021-05-18 | 2021-07-23 | 黑龙江科技大学 | Preparation method of graphene heavy-duty anticorrosive coating |
| CN114410196A (en) * | 2021-12-20 | 2022-04-29 | 江南载福粉末涂料（张家港）有限公司 | Boiling-resistant powder coating and preparation method and application thereof |
| CN114539871A (en) * | 2022-01-27 | 2022-05-27 | 福建万安实业集团有限公司 | Anticorrosive powder coating for deep well pipeline and preparation method and application thereof |
| CN116239908A (en) * | 2022-12-30 | 2023-06-09 | 福建万安实业集团有限公司 | Insulating sand grain powder coating and preparation method thereof |
| CN117019575A (en) * | 2023-08-18 | 2023-11-10 | 中微纳新能源科技(东莞)有限公司 | Preparation method and device of fastener with graphene-based anti-corrosion coating |
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