CN114133831A - Graphene oxide water-based epoxy coating and preparation method thereof - Google Patents
Graphene oxide water-based epoxy coating and preparation method thereof Download PDFInfo
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- CN114133831A CN114133831A CN202111618550.6A CN202111618550A CN114133831A CN 114133831 A CN114133831 A CN 114133831A CN 202111618550 A CN202111618550 A CN 202111618550A CN 114133831 A CN114133831 A CN 114133831A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 63
- 229920006334 epoxy coating Polymers 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003822 epoxy resin Substances 0.000 claims abstract description 21
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 21
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- 239000010445 mica Substances 0.000 claims abstract description 12
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- 239000000080 wetting agent Substances 0.000 claims abstract description 9
- 239000005028 tinplate Substances 0.000 claims abstract description 8
- 239000012895 dilution Substances 0.000 claims abstract description 6
- 238000010790 dilution Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005536 corrosion prevention Methods 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
Images
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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
Abstract
The graphene oxide water-based epoxy coating is composed of epoxy resin, a curing agent, zinc powder, mica powder, a wetting agent, a defoaming agent, an anti-flash rust agent, a leveling agent, an anti-settling agent, graphene oxide and a dispersing agent. The preparation method of the coating comprises the steps of dispersing the water-based epoxy resin, the wetting agent, the defoaming agent, the anti-flash rust agent, the leveling agent and the anti-settling agent, adding the mica powder, the graphene oxide and the dispersing agent, continuously dispersing, adding the zinc powder for uniform dispersion, continuously adding the curing agent for dilution, coating the obtained coating on the tinplate, and curing to obtain the graphene oxide water-based epoxy coating. The graphene oxide waterborne epoxy coating can play double roles of physical shielding corrosion prevention and electrochemical effect corrosion prevention, greatly improves the corrosion prevention effect, has simple preparation process, easy operation, low requirement on equipment, environment friendliness and is suitable for industrial production.
Description
Technical Field
The invention relates to a graphene oxide water-based epoxy coating and a preparation method thereof, and particularly belongs to the technical field of anticorrosive coatings.
Background
The traditional epoxy zinc-rich coating is widely applied in the field of heavy corrosion prevention, the corrosion prevention mechanism is based on the cathode protection effect of active metal zinc on iron, but too high zinc powder can cause the coating to be porous, the adhesive force to be reduced, and the cost to be increased. The graphene oxide serving as a nano material has excellent barrier property, large specific surface area and good conductivity, and the surface of the graphene oxide has hydrophilic oxygen-containing functional groups, so that the dispersibility of the graphene oxide in a water-based coating can be improved.
Due to the excellent physical properties of epoxy resin, in the research of an anticorrosive coating, graphene oxide is added into an aqueous epoxy resin solution to prepare the obtained coating. The coating enhances the physical anticorrosion effect due to the addition of the graphene oxide. The coating has low hardness because the coating occupies less filler; meanwhile, the inside of the coating cannot play a role in a cathode protection method of a sacrificial anode, so that the coating lacks current protection.
Graphene is a single-atomic-layer sheet-shaped two-dimensional nano material and has a plurality of excellent performances, but larger van der Waals force action among molecules of graphene easily causes agglomeration in a coating, so that the coating is very easy to form holes, corrosive media permeate into the coating, and corrosion is accelerated. The graphene oxide is added into the anticorrosive coating, so that on one hand, a corrosive medium can be prevented by utilizing shielding performance, and on the other hand, a permeation path of the corrosive medium can be prolonged by utilizing a flaky structure of the graphene oxide, and a double-layer anticorrosive effect is achieved. Besides physical corrosion resistance, the graphene oxide and the coating can form a small amount of conductive paths, generate more corrosion products than the original corrosion products, and form a compact protective film on a metal substrate.
Compared with an epoxy zinc-rich coating, the coating provided by the invention can solve the problem of excessive zinc content in the coating, increase the adhesive force of the coating and reduce the porosity of the coating. Compared with the method that only graphene oxide is added into epoxy resin, part of zinc powder in the coating can play a role in cathode protection while the hardness of the coating is increased, and the anticorrosion effect of the coating is further increased.
Disclosure of Invention
The invention aims to provide a graphene oxide water-based epoxy coating and a preparation method thereof, so as to overcome the defects in the prior art.
The graphene oxide waterborne epoxy coating disclosed by the invention comprises the following components: the anti-flash anti-rust paint comprises, by mass, 26% of epoxy resin, 16% of a curing agent, 50% of zinc powder, 5.8% -6.4% of mica powder, 0.4% of a wetting agent, 0.4% of an antifoaming agent, 0.2% of an anti-flash rust agent, 0.2% of a leveling agent, 0.4% of an anti-settling agent, 0-0.4% of graphene oxide and 0-0.2% of a dispersing agent.
The preparation method of the coating comprises the following steps:
step 1: controlling the rotation speed of a sand mill to be 800 r/min, dispersing the water-based epoxy resin, the wetting agent, the defoaming agent, the anti-flash rust agent, the flatting agent and the anti-settling agent for 5 min, adding the mica powder, the graphene oxide and the dispersing agent, continuously stirring and dispersing for 10 min, then adding the zinc powder at the rotation speed of 300 r/min, and continuously stirring and dispersing for 15 min at the rotation speed of 1500 r/min after the zinc powder is added;
step 2: adding a certain amount of curing agent into the dispersed mixed solution obtained in the step 1, stirring and dispersing uniformly, adding clear water for dilution, uniformly coating the mixture on a tinplate by using a wire bar coater with the thickness of 150 micrometers, and drying and curing at room temperature for 7 days to obtain the graphene oxide waterborne epoxy coating.
The epoxy resin is 6520-WH-53 type waterborne epoxy resin;
the curing agent is an IKURE8538-Y-68 type water-based curing agent;
the type of the dispersant is JCGWDS;
the granularity of the zinc powder is 800 meshes;
the particle size of the mica powder is 1000 meshes.
The invention has the beneficial effects that: 1. the flaky two-dimensional structure of the graphene oxide can delay the penetration of corrosive media, and has the effects of physical shielding and corrosion prevention; on the other hand, zinc in the coating is an active metal compared with the matrix iron and can play a role in cathodic protection of a sacrificial anode, so that the graphene oxide waterborne epoxy coating can play double roles of physical shielding corrosion resistance and electrochemical effect corrosion resistance, and the corrosion resistance effect is greatly improved; 2. the graphene oxide waterborne epoxy coating disclosed by the invention is simple in preparation process, easy to operate, low in equipment requirement, environment-friendly and suitable for industrial production.
Drawings
FIG. 1 is a scanning electron microscope image of a cured graphene oxide waterborne epoxy coating according to embodiment 1 of the present invention;
FIG. 2 is a scanning electron microscope image of the surface of a graphene oxide waterborne epoxy coating cured according to embodiment 2 of the present invention;
FIG. 3 is a scanning electron microscope image of the surface of a cured graphene oxide waterborne epoxy coating according to embodiment 3 of the present invention;
FIG. 4 is a scanning electron micrograph of the cured aqueous epoxy coating of comparative example 1 of the present invention;
FIG. 5 is a Nyquist plot of electrochemical impedance spectroscopy data measured after the coatings of examples 1-3 of the present invention and comparative example 1 were immersed in a 3.5wt% NaCl solution for 55 days;
FIG. 6 is a Bode plot of electrochemical impedance spectroscopy data measured after the coatings of examples 1-3 of the present invention and comparative example 1 are immersed in 3.5wt% NaCl solution for 55 days;
FIG. 7 is data of polarization curves measured after the coatings of examples 1 to 3 of the present invention and comparative example 1 were immersed in 3.5wt% NaCl solution for 55 days.
Detailed Description
The present invention is further described below by way of examples and figures, but the embodiments of the present invention are not limited thereto.
Example 1
The graphene oxide waterborne epoxy coating comprises the following components in percentage by mass: 26% of epoxy resin, 16% of curing agent, 50% of zinc powder, 6.25% of filler, 0.4% of wetting agent, 0.4% of defoaming agent, 0.2% of anti-flash rust agent, 0.2% of flatting agent, 0.4% of anti-settling agent, 0.1% of graphene oxide and 0.05% of dispersing agent.
The preparation method comprises the following steps:
step 1: adding 26g of waterborne epoxy resin and 1.6g of reagent into a beaker, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; adding 6.25g of mica powder, 0.1g of graphene oxide and 0.05g of dispersing agent, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; 50g of zinc powder is added at the rotating speed of 300 r/min and stirred for 15 min at the rotating speed of 1500 r/min.
Step 2: 16g of curing agent was added and stirred until the resin and curing agent were completely reacted. The novel graphene oxide water-based epoxy coating with the graphene oxide mass fraction of 0.1% is prepared.
Step 2: adding a certain amount of curing agent into the dispersed mixed solution obtained in the step 1, stirring and dispersing uniformly, adding clear water for dilution, uniformly coating the mixture on a tinplate by using a wire bar coater with the thickness of 150 micrometers, and drying and curing at room temperature for 7 days to obtain the graphene oxide waterborne epoxy coating.
The specification of the tinplate is as follows: 120X 25X 0.28 mm, grinding the surface of the substrate by 400-mesh and 800-mesh sand paper, wiping off stains on the surface by alcohol, and drying for later use.
Example 2
The composition comprises the following components in percentage by mass:
26% of epoxy resin, 16% of curing agent, 50% of zinc powder, 5.95% of filler, 1.6% of reagent, 0.3% of graphene oxide and 0.15% of dispersing agent.
The preparation method comprises the following steps:
step 1: adding 26g of waterborne epoxy resin and 1.6g of reagent into a beaker, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; adding 5.95 g of mica powder, 0.3g of graphene oxide and 0.15g of dispersing agent, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; 50g of zinc powder is added at the rotating speed of 300 r/min and stirred for 15 min at the rotating speed of 1500 r/min.
Step 2: adding 16g of curing agent, stirring until the resin and the curing agent are complete, preparing a novel dispersed mixed solution with the mass fraction of the graphene oxide being 0.1%, adding clear water for dilution, uniformly coating the solution on a tinplate by a wire bar coater with the thickness of 150 mu m, and drying and curing at room temperature for 7 days to obtain the graphene oxide waterborne epoxy coating.
Example 3
The composition comprises the following components in percentage by mass:
26% of epoxy resin, 16% of curing agent, 50% of zinc powder, 5.8% of filler, 0.4% of wetting agent, 0.4% of defoaming agent, 0.2% of anti-flash rust agent, 0.2% of flatting agent, 0.4% of anti-settling agent, 0.4% of graphene oxide and 0.2% of dispersing agent.
The preparation method comprises the following steps:
step 1: adding 26g of waterborne epoxy resin and 1.6g of reagent into a beaker, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; adding 5.8g of mica powder, 0.4g of graphene oxide and 0.2g of dispersing agent, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; 50g of zinc powder is added at the rotating speed of 300 r/min and stirred for 15 min at the rotating speed of 1500 r/min.
Step 2: adding 16g of curing agent, stirring until the resin and the curing agent are complete, preparing a novel dispersed mixed solution with the mass fraction of the graphene oxide being 0.1%, adding clear water for dilution, uniformly coating the solution on a tinplate by a wire bar coater with the thickness of 150 mu m, and drying and curing at room temperature for 7 days to obtain the graphene oxide waterborne epoxy coating.
Comparative example 1
The composition comprises the following components in percentage by mass:
26% of epoxy resin, 16% of curing agent, 50% of zinc powder, 6.4% of filler, 0.4% of wetting agent, 0.4% of defoaming agent, 0.2% of anti-flash rust agent, 0.2% of flatting agent, 0.4% of anti-settling agent, 0% of graphene oxide and 0% of dispersing agent. The preparation method comprises the following steps:
step 1: adding 26g of waterborne epoxy resin and 1.6g of reagent into a beaker, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; adding 6.4g of mica powder, dispersing at the rotating speed of 800 r/min, and stirring for 10 min; 50g of zinc powder is added at the rotating speed of 300 r/min and stirred for 15 min at the rotating speed of 1500 r/min.
Step 2: adding 16g of curing agent into the dispersed mixed solution obtained in the step 1, stirring until the resin and the curing agent are complete, preparing a graphene oxide waterborne epoxy coating with the mass fraction of 0% of graphene oxide, diluting the graphene oxide waterborne epoxy coating with a proper amount of clear water, uniformly coating the graphene oxide waterborne epoxy coating on a tinplate by using a 150-micrometer wire bar coater, and drying and curing the coating for 7 days at room temperature to obtain the graphene oxide waterborne epoxy coating.
Description of the test
a) Scanning electron microscope
The cured coatings of examples 1-3 and comparative example 1 were observed by scanning electron microscopy to determine the distribution of the coating surface, and the results are shown in FIGS. 1-4. As can be seen from FIGS. 1-4, no significant pores or cracks were found on the surface of the coating. Compared with the comparative example 1, the distribution of the zinc powder and the graphene oxide in the coating added with the graphene oxide is relatively uniform, the surface distribution of the coating is more compact, and the overall dispersibility of the surface coating is better. The addition of the graphene oxide can improve the dispersion degree of the coating system.
Electrochemical impedance spectroscopy test
Adopting a three-electrode system to cure 10
10mm coating as working electrode, saturated calomel electrode as reference electrode, 20
A20 mm platinum plate electrode was used as a counter electrode, which was placed in a 3.5wt% NaCl solution, and the electrochemical impedance spectrum was measured using CHI660C electrochemical workstation. Test frequency range of 10-2～105. As can be seen from the Nyquist plot of fig. 5, the radius of the impedance ring of the coating of example 2 after 55 days of immersion is the largest, reflecting its best corrosion resistance; while the radius of the resistance ring of the coating of comparative example 1 after 55 days of immersion was the smallest, representing the worst corrosion resistance of the coating. This is also demonstrated in the Bode plot of fig. 6, where the ordinate intercept is the indicator of semi-permeability resistance, with the ordinate intercept being the largest for example 2, reflected as the best corrosion resistance of the coating, and the smallest for comparative example 1.
Polarization curve testing
Measurement with three-electrode system, saturated calomel electrode as reference electrode, 20
A20 mm platinum plate electrode was used as a counter electrode, and placed in a 3.5wt% NaCl solution to measure electrochemical impedance spectroscopy.
TABLE 1 analysis of polarization curve test results
Claims (7)
1. A graphene oxide waterborne epoxy coating is characterized in that: the coating consists of the following components: the anti-flash anti-rust paint comprises, by mass, 26% of epoxy resin, 16% of a curing agent, 50% of zinc powder, 5.8% -6.4% of mica powder, 0.4% of a wetting agent, 0.4% of an antifoaming agent, 0.2% of an anti-flash rust agent, 0.2% of a leveling agent, 0.4% of an anti-settling agent, 0-0.4% of graphene oxide and 0-0.2% of a dispersing agent.
2. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the preparation method of the coating comprises the following steps:
step 1: controlling the rotation speed of a sand mill to be 800 r/min, dispersing the water-based epoxy resin, the wetting agent, the defoaming agent, the anti-flash rust agent, the flatting agent and the anti-settling agent for 5 min, adding the mica powder, the graphene oxide and the dispersing agent, continuously stirring and dispersing for 10 min, then adding the zinc powder at the rotation speed of 300 r/min, and continuously stirring and dispersing for 15 min at the rotation speed of 1500 r/min after the zinc powder is added;
step 2: adding a certain amount of curing agent into the dispersed mixed solution obtained in the step 1, stirring and dispersing uniformly, adding clear water for dilution, uniformly coating the mixture on a tinplate by using a wire bar coater with the thickness of 150 micrometers, and drying and curing at room temperature for 7 days to obtain the graphene oxide waterborne epoxy coating.
3. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the epoxy resin is 6520-WH-53 type waterborne epoxy resin.
4. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the curing agent is IKURE8538-Y-68 type water-based curing agent.
5. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the type of the dispersant is JCGWDS.
6. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the granularity of the zinc powder is 800 meshes.
7. The graphene oxide waterborne epoxy coating according to claim 1, wherein: the particle size of the mica powder is 1000 meshes.
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| CN202111618550.6A CN114133831A (en) | 2021-12-28 | 2021-12-28 | Graphene oxide water-based epoxy coating and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114989697A (en) * | 2022-06-14 | 2022-09-02 | 江苏荣辉电力设备制造有限公司 | Corrosion-resistant coating for power transmission and transformation iron tower and preparation method thereof |
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| US20160280931A1 (en) * | 2013-03-06 | 2016-09-29 | The Sixth Element (Changzhou) Materials Technology Co., Ltd. | Zinc-Rich Epoxy Anti-Corrosion Coating and Preparation Method Thereof |
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN112375459A (en) * | 2020-11-20 | 2021-02-19 | 广东豪之盛新材料有限公司 | Graphene/water-based epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method thereof |
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2021
- 2021-12-28 CN CN202111618550.6A patent/CN114133831A/en active Pending
Patent Citations (4)
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| US20160280931A1 (en) * | 2013-03-06 | 2016-09-29 | The Sixth Element (Changzhou) Materials Technology Co., Ltd. | Zinc-Rich Epoxy Anti-Corrosion Coating and Preparation Method Thereof |
| CN105713481A (en) * | 2014-12-03 | 2016-06-29 | 江苏邦杰防腐保温科技有限公司 | Graphene-modified epoxy zinc-rich primer and preparation method thereof |
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN112375459A (en) * | 2020-11-20 | 2021-02-19 | 广东豪之盛新材料有限公司 | Graphene/water-based epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114989697A (en) * | 2022-06-14 | 2022-09-02 | 江苏荣辉电力设备制造有限公司 | Corrosion-resistant coating for power transmission and transformation iron tower and preparation method thereof |
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