CN113308172A - Preparation and use method of composite anticorrosive paint for cable-stayed bridge inhaul cable - Google Patents
Preparation and use method of composite anticorrosive paint for cable-stayed bridge inhaul cable Download PDFInfo
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- CN113308172A CN113308172A CN202110637636.7A CN202110637636A CN113308172A CN 113308172 A CN113308172 A CN 113308172A CN 202110637636 A CN202110637636 A CN 202110637636A CN 113308172 A CN113308172 A CN 113308172A
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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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- 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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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Abstract
The invention discloses a preparation method and a use method of a composite anticorrosive paint for a cable-stayed bridge cable. The composite anticorrosive paint not only can endow part of special functions which are not possessed by the traditional epoxy anticorrosive paint, including ultraviolet resistance, wear resistance, antibacterial property and the like. Meanwhile, the X-ray laser dispersion method is adopted, graphene can be effectively dispersed, the corrosion resistance of the coating is greatly improved, the coating can be used in combination with fluorocarbon finish or polyurethane finish in an epoxy coating system, the color of a primer film is changed through the finish, and the film forming color of the coating is adjusted, so that the corrosion resistance and the aesthetic property of the cable-stayed bridge cable are greatly improved.
Description
Technical Field
The invention belongs to the technical field of bridge safety, and particularly relates to a preparation method and a use method of a composite anticorrosive paint for a cable-stayed bridge inhaul cable.
Background
The corrosion of the steel wire of the inhaul cable leads to the phenomenon that the HDPE sheath bulges at the corrosion position due to the increase of the molecular weight of the steel wire. Therefore, the anticorrosive paint is adopted for corrosion of a plurality of inhaul cables, and has excellent physical and chemical anticorrosive effects based on the unique structure of graphene. At present, research results of preparing an anticorrosive film by a CVD method are advanced, but the quality factors of the film are more, including selection requirements of a metal substrate, substrate pretreatment, types of carbon sources, a high-temperature vacuum environment and the like, so that graphene defect residues are inevitably caused, electrochemical corrosion is accelerated, the quality guarantee period of the graphene film is shortened, and the wide application of the method is restricted. Therefore, the graphene epoxy resin anticorrosive paint is produced at the same time. The nanoparticles TiO under the action of aminosilane2、Al2O3、SiO2、Fe2O3Adsorb on GO thin slice surface to prepare composite coating with epoxy blending, the coating micropore is filled in the dispersion effect of nanometer particle promotion GO in the coating when, has improved composite coating's barrier propterty, has nevertheless increased the thickness of GO thin slice, has reduced the mobility of coating, has increased coating surface roughness. The other method is to prepare the GO epoxy resin composite coating by adopting an in-situ synthesis method, the GO is reduced under the action of polyvinylpyrrolidone (PVP) to obtain PVP-GO, and the GO modified by the PVP has good dispersibility and adhesiveness in the epoxy resin, so that the porosity of the coating is reduced. However, the in situ synthesis method uses a large amount of organic solvent in the preparation process and is harmful to human bodies and the environment.
Disclosure of Invention
The technical problem is as follows: the invention aims to solve the technical problem of providing a preparation method and a use method of a composite anticorrosive paint for a cable-stayed bridge cable aiming at the defects of the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a preparation method and a use method of a composite anticorrosive paint for a cable-stayed bridge cable are characterized in that: the preparation method comprises the steps of dispersing graphene in an ammonia water solvent by adopting an X-ray laser dispersion method to prepare a graphene dispersion solution, adding an anti-precipitation agent, magnetically stirring and mixing with aqueous epoxy resin to prepare the composite anticorrosive material, and also can be used in combination with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system, changing the color of a primer paint film through the finish paint, and adjusting the film forming color of the paint.
Furthermore, the X-ray adopted by the graphene is a field emission cathode ray tube made of carbon nano tubes to emit high-energy electrons, and the X-ray can be generated without using high temperature to generate high-energy electron beams. Under the condition of room temperature, a thin layer of carbon nano tube can generate high-energy electron beams, and X rays can be emitted after a power supply is switched on, so that the preheating process of metal wires is avoided.
Furthermore, the X-ray laser dispersion method utilizes the thermal action of X-rays to convert most of X-ray energy absorbed by the graphene into heat energy, so that the temperature of the graphene is continuously raised, and simultaneously utilizes the generated huge energy, thereby overcoming the van der Waals force between graphene sheet layers and preparing the graphene powder which is better to be stably dispersed in ammonia water. Meanwhile, the generated high temperature can partially gasify the ammonia water, and the generated air pressure has a remarkable action effect on overcoming the van der Waals force between graphene sheets.
Furthermore, the epoxy anticorrosive paint mainly comprises epoxy resin, pigment, extender pigment, drier, auxiliary agent and organic solvent.
Further, the graphene powder is a two-dimensional carbon material formed by stacking 3-10 layers of carbon atoms which are periodically and closely stacked in a benzene ring structure (namely a hexagonal honeycomb structure) in different stacking modes (including ABC stacking, ABA stacking and the like).
Further, the graphene powder is prepared by preparing graphite oxide by a Hummer method; placing graphite oxide into water for ultrasonic dispersion to form a uniformly dispersed graphene oxide solution with the mass concentration of 0.25-1 g/L, and then dropwise adding ammonia water with the mass concentration of 28% into the graphene oxide solution; dissolving a reducing agent in water to form an aqueous solution with the mass concentration of 0.25-2 g/L; and uniformly mixing the prepared graphene oxide solution and the reducing agent aqueous solution, placing the obtained mixed solution in an oil bath for stirring, and after the reaction is finished, filtering, washing and drying the mixture to obtain the graphene powder.
Furthermore, the graphene powder is added into the epoxy resin anticorrosive paint, the applicable surface area of each gram of graphene is 2630 square meters, the price of each gram of graphene is about 1.5 yuan, and the economical efficiency is very high.
Furthermore, the graphene epoxy anticorrosive paint is combined with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system for use, a primer paint film is changed in color through the finish paint, the film forming color of the paint is adjusted to be white, and sunlight can be reflected under the condition of strong light, so that the cable of the cable-stayed bridge can be better protected.
Furthermore, the fluorocarbon finish paint is a two-component self-drying paint of high-grade fluorocarbon resin, special resin and main film forming substances. The fluorine resin coating has high electronegativity and strong carbon-fluorine bond energy due to the introduced fluorine element, has various particularly excellent performances including weather resistance, heat resistance, low temperature resistance and chemical resistance, and has unique non-adhesiveness and low friction.
Furthermore, the polyurethane finish paint is a two-component polyurethane anti-corrosion finish paint which is composed of synthetic resin as a base material, a coloring pigment and a curing agent.
Furthermore, when the dosage of the dispersing agent in the curing agent component is determined to be 0.6 percent and the dosage of the thixotropic agent is 1.7 percent, the coating is simple in production process and stable in storage, and when the dosage ratio of active hydrogen to epoxy substance is 0.8-1.0, the coating shows better physical and mechanical properties and neutral salt spray resistance.
Further, the composite anticorrosive material for the cable-stayed bridge inhaul cable comprises the following implementation methods:
firstly, the prepared graphene epoxy resin anticorrosive paint is stored in a glass container which is ventilated and dried to prevent direct irradiation of sunlight, a fire source is isolated, a heat source is far away, and a packaging container needs to be sealed. The storage temperature should be greater than 0 ℃. Storage at high temperatures (greater than 30 ℃) or in a refrigerated environment (less than 0 ℃) is not recommended;
secondly, controlling the temperature of the substrate at normal temperature, drying the surface for 1 hour, and performing actual drying for 24 hours;
thirdly, combining the graphene epoxy anticorrosive paint with fluorocarbon finish or polyurethane finish in an epoxy paint system, and stirring for 25 minutes to be uniformly used under the condition of normal temperature;
and fourthly, when the coating is used, the graphene epoxy resin anticorrosive coating is filled into a spraying device with the nozzle size of 2.0-3.0mm and the nozzle pressure (minimum) of 0.4Mpa, and the surface of the stay cable of each cable-stayed bridge is sprayed in the air.
Thirdly, when the stay cable is sprayed, in order to ensure that the coating on the surface of the stay cable is uniformly sprayed, a manual electrostatic spray gun is adopted, so that the stay cable can be uniformly sprayed in a short time.
Finally, because the corrosion degree of the bottom of the inhaul cable is large, 4.0% of graphene material, 50.0% of conductive carbon black, 15.0% of acetylene black and 20.0% of graphite can be adopted, and resin, a curing agent and the like are added according to the filler combination to manufacture a coating, so that the corrosion of the bottom of the inhaul cable caused by rainwater deposition is greatly reduced. Meanwhile, the surface of the inhaul cable coated with the coating is filled with oily sealing wax, so that water or steam can be prevented from entering the inner layer through the outer layer, and the protective effect of two-layer protection is achieved.
Has the advantages that:
according to the composite anticorrosive paint for the cable-stayed bridge inhaul cable, disclosed by the invention, the graphene epoxy resin anticorrosive paint is dispersed in an ammonia water solvent by adopting an X-ray laser dispersion method, so that a graphene dispersion liquid is prepared, and an anti-precipitant is added to be magnetically stirred and mixed with the waterborne epoxy resin to prepare the composite anticorrosive material, so that part of special functions which are not possessed by the traditional epoxy anticorrosive paint can be endowed, including ultraviolet resistance, wear resistance, antibacterial property and the like. The thickness of the graphene sheet can be greatly reduced, the fluidity of the coating is improved, and the surface roughness of the coating is reduced. And the preparation process adopts an X-ray laser dispersion method, controls the heat absorbed by the graphene, overcomes the van der Waals force between graphene sheets, and prepares the graphene powder which is better dispersed in ammonia water stably. Meanwhile, the dosage of the organic solvent can be greatly reduced, and the environment is protected. In addition, the graphene epoxy resin coating can be combined with fluorocarbon finish or polyurethane finish in an epoxy coating system for use, the color of a primer film is changed through the finish, the film forming color of the coating is adjusted to be white, and the influence of illumination on the corrosion of the inhaul cable is reduced. In addition, the graphene powder is added into the epoxy resin anticorrosive paint, the applicable surface area of each gram of graphene is 2630 square meters, the price of each gram of graphene is about 1.5 yuan, and the economical efficiency is very high. And the corrosion degree of the bottom of the inhaul cable is large, 4.0% of graphene material, 50.0% of conductive carbon black, 15.0% of acetylene carbon black and 20.0% of graphite can be adopted, and resin, a curing agent and the like are added according to the filler combination to manufacture a coating, so that the corrosion of the bottom caused by rainwater deposition is greatly reduced. Meanwhile, due to the simple design and convenient operation, great convenience is provided for the safety of the bridge.
Drawings
FIG. 1 is a schematic view of the microstructure of the composite anticorrosive paint of the present invention.
FIG. 2 is a flow chart of the preparation process of the composite anticorrosive paint of the invention.
FIG. 3 is a schematic diagram of the application method and steps of the composite anticorrosive paint of the present invention.
Detailed Description
The above-mentioned contents of the present invention are further described in detail by way of examples below, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following examples, and any technique realized based on the above-mentioned contents of the present invention falls within the scope of the present invention.
The following further illustrates embodiments of the invention:
a preparation method and a use method of a composite anticorrosive paint for a cable-stayed bridge cable are characterized in that: the preparation method comprises the steps of dispersing graphene in an ammonia water solvent by adopting an X-ray laser dispersion method to prepare a graphene dispersion solution, adding an anti-precipitation agent, magnetically stirring and mixing with aqueous epoxy resin to prepare the composite anticorrosive material, and also can be used in combination with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system, changing the color of a primer paint film through the finish paint, and adjusting the film forming color of the paint.
In an embodiment, the implementation method includes the following steps:
firstly, the prepared graphene epoxy resin anticorrosive paint is stored in a glass container which is ventilated and dried to prevent direct irradiation of sunlight, a fire source is isolated, a heat source is far away, and a packaging container needs to be sealed. The storage temperature should be greater than 0 ℃. Storage at high temperatures (greater than 30 ℃) or in a refrigerated environment (less than 0 ℃) is not recommended;
secondly, controlling the temperature of the substrate at normal temperature, drying the surface for 1 hour, and performing actual drying for 24 hours;
thirdly, combining the graphene epoxy anticorrosive paint with fluorocarbon finish or polyurethane finish in an epoxy paint system, and stirring for 25 minutes to be uniformly used under the condition of normal temperature;
and finally, when in use, the graphene epoxy resin anticorrosive paint is filled into a spraying device with the nozzle size of 2.0-3.0mm and the nozzle pressure (minimum) of 0.4Mpa, and the surface of the stay cable of each cable-stayed bridge is sprayed in the air.
Thirdly, when the stay cable is sprayed, in order to ensure that the coating on the surface of the stay cable is uniformly sprayed, a manual electrostatic spray gun is adopted, so that the stay cable can be uniformly sprayed in a short time.
Finally, because the corrosion degree of the bottom of the inhaul cable is large, 4.0% of graphene material, 50.0% of conductive carbon black, 15.0% of acetylene black and 20.0% of graphite can be adopted, and resin, a curing agent and the like are added according to the filler combination to manufacture a coating, so that the corrosion of the bottom of the inhaul cable caused by rainwater deposition is greatly reduced. Meanwhile, the surface of the inhaul cable coated with the coating is filled with oily sealing wax, so that water or steam can be prevented from entering the inner layer through the outer layer, and the protective effect of two-layer protection is achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The composite anticorrosive paint for the cable-stayed bridge inhaul cable is characterized in that: the preparation method comprises the steps of dispersing graphene in an ammonia water solvent by adopting an X-ray laser dispersion method to prepare a graphene dispersion solution, adding an anti-precipitation agent, magnetically stirring and mixing with water-based epoxy resin to prepare the composite anticorrosive material, combining with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system for use, changing the color of a primer paint film through the finish paint, and adjusting the film forming color of the paint.
2. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the X-ray adopted by the graphene is a field emission cathode ray tube made of carbon nano tubes to emit high-energy electrons, and the X-ray can be generated without utilizing high-energy electron beams generated at high temperature; under the condition of room temperature, a thin layer of carbon nano tube can generate high-energy electron beams, and X rays can be emitted after a power supply is switched on, so that the preheating process of metal wires is avoided.
3. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the X-ray laser dispersion method is characterized in that most of X-ray energy absorbed by graphene is converted into heat energy by utilizing the thermal action of X-rays, so that the temperature of the graphene is continuously raised, and simultaneously, the generated huge energy is utilized, so that the van der Waals force between graphene sheets is overcome, and the prepared graphene powder is better and stably dispersed in ammonia water; meanwhile, the generated high temperature can partially gasify the ammonia water, and the generated air pressure has a remarkable action effect on overcoming the van der Waals force between graphene sheets.
4. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the epoxy anticorrosive paint mainly comprises epoxy resin, pigment, extender pigment, drier, auxiliary agent and organic solvent; the graphene powder is a two-dimensional carbon material which is formed by stacking 3-10 layers of carbon atoms which are periodically and closely stacked in a benzene ring structure, namely a hexagonal honeycomb structure, in different stacking modes.
5. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the graphene powder is prepared by a Hummer method; placing graphite oxide into water for ultrasonic dispersion to form a uniformly dispersed graphene oxide solution with the mass concentration of 0.25-1 g/L, and then dropwise adding ammonia water with the mass concentration of 28% into the graphene oxide solution; dissolving a reducing agent in water to form an aqueous solution with the mass concentration of 0.25-2 g/L; and uniformly mixing the prepared graphene oxide solution and the reducing agent aqueous solution, placing the obtained mixed solution in an oil bath for stirring, and after the reaction is finished, filtering, washing and drying the mixture to obtain the graphene powder.
6. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the graphene epoxy anticorrosive paint is combined with fluorocarbon finish paint or polyurethane finish paint in an epoxy paint system, a primer paint film is changed in color through the finish paint, the film forming color of the paint is adjusted to be white, and sunlight is reflected under the condition of strong light, so that the cable of the cable-stayed bridge is protected better.
7. The composite anticorrosive paint for cable-stayed bridge cables according to claim 1, characterized in that: the fluorocarbon finish paint is a two-component self-drying paint of high-grade fluorocarbon resin, special resin and a main film forming substance; the polyurethane finish paint is a two-component polyurethane anti-corrosion finish paint which is composed of synthetic resin as a base material, a coloring pigment and a curing agent.
8. The composite anticorrosive paint for cable-stayed bridge cables according to claim 7, characterized in that: the amount of the dispersing agent in the curing agent component is determined to be 0.6%, the amount of the thixotropic agent is 1.7%, and when the amount ratio of active hydrogen to epoxy substance is 0.8-1.0, the coating shows better physical and mechanical properties and neutral salt spray resistance.
9. The use method of the composite anticorrosive paint for cable-stayed bridge cables according to any one of claims 1 to 8, characterized in that the implementation method comprises the following steps:
firstly, storing the prepared graphene epoxy resin anticorrosive paint in a ventilated and dried glass container which is prevented from being directly irradiated by sunlight, isolating a fire source, keeping away from a heat source, and sealing a packaging container;
secondly, controlling the temperature of the substrate at normal temperature, drying the surface for 1 hour, and performing actual drying for 24 hours;
mixing the graphene epoxy anticorrosive paint with fluorocarbon finish or polyurethane finish in an epoxy paint system, and stirring for 25 minutes to be uniform at normal temperature;
when in use, the mixed coating is put into a spraying device with the nozzle size of 2.0-3.0mm and the nozzle pressure of more than or equal to 0.4Mpa, and the surface of the stay cable of each cable-stayed bridge is sprayed in the air;
when the stay cable is sprayed, in order to ensure that the coating on the surface of the stay cable is uniformly sprayed, a manual electrostatic spray gun is adopted, so that the stay cable can be uniformly sprayed in a short time;
filling the surface of the inhaul cable coated with the coating with oily sealing wax, so that water or steam can be prevented from entering the inner layer through the outer layer, and the protective effect of two-layer protection is achieved.
10. The use method of the composite anticorrosive paint for cable-stayed bridge cables according to claim 9, characterized in that: because the corrosion degree of the bottom of the inhaul cable is large, 4.0% of graphene material, 50.0% of conductive carbon black, 15.0% of acetylene carbon black and 20.0% of graphite are adopted, and resin, a curing agent and the like are added according to the filler combination to manufacture a coating, so that the corrosion of the bottom of the inhaul cable caused by rainwater deposition is greatly reduced.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808473A (en) * | 2021-09-26 | 2021-12-17 | 武汉理工大学 | Two-dimensional code label coating for maritime work equipment and preparation method thereof |
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