CN109111825A - A kind of preparation method and application of graphene film zinc composite heavy corrosion protection coating - Google Patents
A kind of preparation method and application of graphene film zinc composite heavy corrosion protection coating Download PDFInfo
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- CN109111825A CN109111825A CN201810846129.2A CN201810846129A CN109111825A CN 109111825 A CN109111825 A CN 109111825A CN 201810846129 A CN201810846129 A CN 201810846129A CN 109111825 A CN109111825 A CN 109111825A
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- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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Abstract
The invention discloses a kind of preparation method and application of graphene film zinc composite heavy corrosion protection coating.1) preparation method of this graphene film zinc composite heavy corrosion protection coating is the following steps are included: prepare graphene ceramic composite powder；2) graphene ceramic slurry is prepared；3) graphene film zinc composite heavy corrosion protection coating is prepared.The application method of this graphene film zinc composite heavy corrosion protection coating is also disclosed simultaneously.The present invention takes low surface tolerance formula design, reduce derusting by sandblasting quality requirement, steel surface can be tolerated through simple or remaining after pretreatment by hand rust staining, oxide skin, various old coatings, moisture, salinity, greasy dirt etc., it can also tolerate the environmental factors such as high temperature, low temperature, high humility, reduce construction cost.
Description
Technical field
The present invention relates to a kind of preparation method and application of graphene film zinc composite heavy corrosion protection coating.
Background technique
In recent years, the steel constructions such as a large amount of offshore production platforms, built bridge, pylon and gymnasium enter dimension both at home and abroad
The phase is repaired, needs to carry out coating again to old coating.In order to guarantee the anticorrosive quality of coating, thorough sandblasting must be carried out to steel
Pre-treatment will usually reach Sa2.5 grades.This proposes high requirement for entire engineering construction: 1, sandblasting needs special
With equipment, a large amount of abrasive materials are expended, project cost is made to improve (typically constitute entire engineering 30%~40%): 2, complexity being made
The structure dead angle in industry face not can be carried out thorough processing；3, strong dust and noise pollution be will cause；4, sandblasting will cause steel
Structure is thinned, and makes its strength reduction, especially in the anti-corrosion maintenance of old steel construction.
It is very big that the difficulty handled before sandblasting is carried out on the basis of these built steel constructions, is related to environmental protection, construction
Difficulty and maintenance of works cost etc..Therefore, hand cleaning is mostly used to be surface-treated it both at home and abroad.But in ship system
Make with maintenance field, due to the needs of environmental protection, hydroblasting and wet abrasive blasting technique just gradually replaces traditional blasting craft, with
Just pre-treatment is carried out to the steel surface of naval vessel inside especially enclosed environment.And above-mentioned various derusting process treated steel
Surface is extremely difficult to Sa2 grades of requirement.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method and application of graphene film zinc composite heavy corrosion protection coating, pass through
Low surface tolerance (Surface Tolerant Coatings) formula design is carried out to zinc alkene coating, it is preferable using permeability
Resin is base-material, is cooperated by means of bleeding agent, polar solvent, and so that coating is surface-treated surface over the ground has good permeability,
To infiltrate and permeate rusty scale, closed, and then reach permanent protective property energy effect.
The technical solution used in the present invention is:
A kind of preparation method of graphene film zinc composite heavy corrosion protection coating, comprising the following steps:
1) graphene ceramic composite powder is prepared
First magnesium powder and alumina powder are uniformly mixed, then obtained mixed powder is placed in reactor, in carbon dioxide
Under atmosphere, it is powered and induces self-propagating combustion reaction, it is cooling, obtain graphene ceramic composite powder；
2) graphene ceramic slurry is prepared
By the graphene ceramic composite powder of 5~10 mass parts, the dispersing agent of 1~5 mass parts and 50~80 mass parts
Solvent mixing, stirs evenly, obtains graphene ceramic slurry；
3) graphene film zinc composite heavy corrosion protection coating is prepared
The epoxy resin of 20~40 mass parts, the bleeding agent of 1~5 mass parts and 10~40 mass parts solvents are mixed
Uniformly, the piece shape zinc powder, the filler of 10~30 mass parts and the auxiliary agent of 1~10 mass parts of 10~20 mass parts are added, is mixed
It stirs evenly, grinds, the graphene ceramic slurry that 5~20 mass parts are then added is mixed evenly, and filters, obtains graphene
Piece zinc composite heavy corrosion protection coating.
It prepares in graphene ceramic composite powder, the mass ratio of alumina powder and magnesium powder is (4~5): 1.
It prepares in graphene ceramic composite powder, the pressure of carbon dioxide atmosphere is 0.4MPa~0.6MPa in reactor.
It prepares in graphene ceramic composite powder, be powered the tungsten for inducing that self-propagating combustion reaction is specially energization 40A~60A
Wire coil induces mixed powder and self-propagating combustion reaction occurs.
It prepares in graphene slurry, at least one of dispersing agent BYK110, BYK161, BYK170 dispersing agent.
It prepares in graphene film zinc composite heavy corrosion protection coating, epoxy resin is E-51 epoxy resin, E-44 epoxy resin, E-
At least one of 20 epoxy resin, DER331 epoxy resin, DER671 epoxy resin, CYD011 epoxy resin；Bleeding agent is
Polyoxyethylene ether compound；Filler is talcum powder, in lithopone, mica powder, blanc fixe, trbasic zinc phosphate, nano silica
At least one；Auxiliary agent is at least one of levelling agent, coupling agent, defoaming agent.
It prepares in graphene film zinc composite heavy corrosion protection coating, is ground to be ground to fineness≤50 μm；Be filtered into 50 mesh~
The sieve of 100 mesh.
It prepares graphene slurry or prepares in graphene film zinc composite heavy corrosion protection coating, solvent is toluene, dimethylbenzene, first
At least one of alcohol, ethyl alcohol, n-butanol, ether, acetone, tetrahydrofuran, N,N-dimethylformamide, dimethyl sulfoxide.
The construction method of this graphene film zinc composite heavy corrosion protection coating, comprising the following steps:
S1: being surface-treated workpiece surface to be onstructed, removes impurity and pollutant；
S2: the graphene film zinc composite heavy corrosion protection coating and curing agent that any one of claim 1~8 is prepared mix
It stirs evenly, obtains construction paint；
S3: construction paint is sprayed or is brushed in workpiece surface to be onstructed.
In the S2 of construction method, the mass ratio of graphene film zinc composite heavy corrosion protection coating and curing agent is (4~6): 1.
The beneficial effects of the present invention are:
The present invention takes low surface tolerance formula design, reduces derusting by sandblasting quality requirement, can tolerate steel surface
Through simple or remaining after pretreatment by hand rust staining, oxide skin, various old coatings, moisture, salinity, greasy dirt etc., can also tolerate
The environmental factors such as high temperature, low temperature, high humility reduce construction cost.
Detailed description of the invention
Fig. 1 is the reaction principle schematic diagram for preparing graphene ceramic composite powder；
Fig. 2 is the schematic diagram for preparing graphene ceramic composite powder reaction product；
Fig. 3 is the graphene scanning electron microscope (SEM) photograph being prepared；
Fig. 4 is the graphene transmission electron microscope picture being prepared；
Fig. 5 is the graphene transmission electron microscope electronic diffraction ring figure being prepared；
Fig. 6 is different aluminium oxide/magnesium powder ratio graphite ene product X-ray diffractogram；
Fig. 7 is the scanning electron microscope (SEM) photograph of graphene ceramic composite powder；
Fig. 8 is the schematic diagram of graphene ceramic slurry；
Fig. 9 is the salt spray test comparison diagram of piece shape Yu spherical zinc powder coating.
Specific embodiment
A kind of preparation method of graphene film zinc composite heavy corrosion protection coating, comprising the following steps:
1) graphene ceramic composite powder is prepared
First magnesium powder and alumina powder are uniformly mixed, then obtained mixed powder is placed in reactor, in carbon dioxide
Under atmosphere, it is powered and induces self-propagating combustion reaction, it is cooling, obtain graphene ceramic composite powder；
2) graphene ceramic slurry is prepared
By the graphene ceramic composite powder of 5~10 mass parts, the dispersing agent of 1~5 mass parts and 50~80 mass parts
Solvent mixing, stirs evenly, obtains graphene ceramic slurry；
3) graphene film zinc composite heavy corrosion protection coating is prepared
The epoxy resin of 20~40 mass parts, the bleeding agent of 1~5 mass parts and 10~40 mass parts solvents are mixed
Uniformly, the piece shape zinc powder, the filler of 10~30 mass parts and the auxiliary agent of 1~10 mass parts of 10~20 mass parts are added, is mixed
It stirs evenly, grinds, the graphene ceramic slurry that 5~20 mass parts are then added is mixed evenly, and filters, obtains graphene
Piece zinc composite heavy corrosion protection coating.
Preferably, it prepares in graphene ceramic composite powder, the mass ratio of alumina powder and magnesium powder is (4~5): 1.
Preferably, it prepares in graphene ceramic composite powder, the partial size of magnesium powder is 90 μm~110 μm.
Preferably, it prepares in graphene ceramic composite powder, the partial size of alumina powder is 180nm~220nm.
Preferably, it prepares in graphene ceramic composite powder, mixing is specially that 40min~80min is mixed in ball grinder.
Preferably, it prepares in graphene ceramic composite powder, mixed powder is placed in the graphite grinding tool of reactor and is carried out
Reaction.
Preferably, prepare in graphene ceramic composite powder, in reactor the pressure of carbon dioxide atmosphere be 0.4MPa~
0.6MPa；It is further preferred that the pressure of carbon dioxide atmosphere is 0.5MPa in reactor.
Preferably, it prepares in graphene ceramic composite powder, the induction self-propagating combustion reaction specially energization 40A that is powered~
The tungsten filament coil of 60A induces mixed powder and self-propagating combustion reaction occurs.
Preferably, it prepares in graphene ceramic composite powder, the temperature of self-propagating combustion reaction is 5000K~5200K.
Preferably, prepare in graphene ceramic composite powder, self-propagating combustion reaction reaction time be 30min~
45min。
Preferably, it prepares in graphene slurry, at least one in dispersing agent BYK110, BYK161, BYK170 dispersing agent
Kind.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, epoxy resin is E-51 epoxy resin, E-44 epoxy
At least one of resin, E-20 epoxy resin, DER331 epoxy resin, DER671 epoxy resin, CYD011 epoxy resin.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, bleeding agent is polyoxyethylene ether compound；Further
Preferably, at least one of bleeding agent AEO3, AEO9.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, filler is talcum powder, lithopone, mica powder, precipitating
At least one of barium sulfate, trbasic zinc phosphate, nano silica；Further, the partial size of filler is 500~2000 mesh.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, the partial size of zinc flake is 10 μm~20 μm, and diameter is thick
Than for (35~45): 1, bulk density is 1kg/L~2kg/L, specific surface area 1m2/ g~1.5m2/ g, oil absorption 20mL/
100g~25mL/100g.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, auxiliary agent is levelling agent, in coupling agent, defoaming agent
It is at least one.
Further, levelling agent can be selected from organobentonite, fumed silica, polyethylene wax.
Further, coupling agent can be selected from KH550, KH560, KH570.
Further, defoaming agent can be selected from BYK054, BYK065, BYK021.
Preferably, it prepares in graphene film zinc composite heavy corrosion protection coating, is ground to be ground to fineness≤50 μm；It was filtered into
50 mesh~100 mesh sieve.
Preferably, it prepares graphene slurry or prepares in graphene film zinc composite heavy corrosion protection coating, solvent is toluene, diformazan
Benzene, methanol, ethyl alcohol, n-butanol, ether, acetone, tetrahydrofuran, N,N-dimethylformamide, at least one in dimethyl sulfoxide
Kind.
The construction method of this graphene film zinc composite heavy corrosion protection coating, comprising the following steps:
S1: being surface-treated workpiece surface to be onstructed, removes impurity and pollutant；
S2: the graphene film zinc composite heavy corrosion protection coating and curing agent that any one of claim 1~8 is prepared mix
It stirs evenly, obtains construction paint；
S3: construction paint is sprayed or is brushed in workpiece surface to be onstructed.
Preferably, in the S2 of construction method, the mass ratio of graphene film zinc composite heavy corrosion protection coating and curing agent be (4~
6): 1.
Preferably, in the S2 of construction method, curing agent is amine curing agent；It is further preferred that curing agent be ethylenediamine,
At least one of hexamethylene diamine, diethylenetriamine, triethylene tetramine, diethylaminopropylamine, m-phenylene diamine (MPD).
The contents of the present invention are described in further detail below by way of specific embodiment.Original used in embodiment
Material unless otherwise specified, can be obtained from routine business approach.
Prepare graphene ceramic composite powder embodiment:
Choosing average grain diameter is that 100 microns of magnesium powder and 200 nanometers of alumina powder mix 1 hour in ball grinder,
Alumina powder and the mass ratio of magnesium powder are 4:1 (i.e. M=4), and the graphite that uniformly mixed material powder is placed in reaction unit is ground
In tool, in the carbon dioxide gas of 0.5MPa, the tungsten filament coil of energization 50A induces magnesium powder and carbon dioxide generation in raw material
Self-propagating combustion reacts (5097K, 40min), after device is cooling, obtains the graphene composite powder of grey black.
Magnesium powder or alumina powder used is commercially available high purity powdered form, Mg content >=99.5wt% in magnesium powder,
Al in alumina powder2O3Content >=99.5wt%.
The reaction principle schematic diagram for preparing graphene ceramic composite powder is shown in that attached drawing 1, the schematic diagram of reaction product are shown in attached drawing
2。
Attached drawing 3 is the graphene scanning electron microscope (SEM) photograph being prepared.As can be seen from Figure 3 exist between graphene layer apparent
Gap avoids graphene during the preparation process between generally existing graphene sheet layer so that graphene sheet layer is disconnected from each other
Stacking and agglomeration.
Attached drawing 4 is the graphene transmission electron microscope picture being prepared.Attached drawing 5 is the graphene transmission electron microscope electronics being prepared
Diffraction ring figure.The graphene of transmission electron microscope pattern display preparation has significant drape characteristic, and electronic diffraction ring shows that its is high-quality
Flow characteristic.
It is prepared by the graphene and conventional oxidation reduction method that the present embodiment (M=4) is prepared by burning synthesis method
Obtained graphene carries out performance comparison, as a result can be shown in Table 1.
1 graphene performance comparison of table
| Graphene performance | Oxidation-reduction method preparation | The preparation of embodiment method |
| Conductivity (S/m) | 100-6500 | 13000 |
| Specific surface area (m2/g) | 30-350 | 709 |
| Oxygen content (wt, %) | 20-30 | 1.2 |
| Size (μm) | 5-10 | 5-10 |
As known from Table 1, the graphene that embodiment is prepared has high conductivity, high-ratio surface, high-purity.
It takes alumina powder and the mass ratio of magnesium powder is that 3:1,5:1,6:1,7:1 and 8:1 are compared, is i.e. the value of M point
It Wei 3,5,6,7 and 8.Different aluminium oxide/magnesium powder ratio graphite ene product X-ray diffractogram is shown in attached drawing 6.Calculation of thermodynamics table
It is bright, Mg/CO2The combustion reaction adiabatic temperature of system is up to 4700 DEG C.At such a temperature, the magnesia of generation can be with addition
Ceramic powder carries out solid phase reaction, generates complex phase ceramic structural material.It will be appreciated from fig. 6 that when the control of aluminium oxide/magnesium powder quality exists
When M is 4~5, synthesizing in ceramic product does not have magnesia, only magnesium aluminate spinel (MgAl2O4) and aluminium oxide composition, Ke Yizhi
It connects and is added in graphene film zinc anticorrosive paint as composite ceramics filler.By between regulation aluminium oxide and metal magnesium powder
It matches (mass ratio M), the magnesia of generation can be changed into magnesium aluminate spinel at high temperature.Graphene film zinc below is prevented again
In rotten Paint Examples, the value for choosing M is the 4 graphene ceramic composite powders being prepared.
Attached drawing 7 is the scanning electron microscope (SEM) photograph of graphene ceramic composite powder.
Graphene of the invention is generated in ceramic powder surface in situ, is taken full advantage of magnesium powder and is reacted with carbon dioxide gas-solid
The compound feature of in-situ deposition realizes graphene with ceramic powder and uniformly mixes dispersion in minute yardstick, has good point
Dissipate stability.Graphene prepared by the present invention is few layer high-quality graphene of the number of plies at 3 layers to 5 layers, has high conductivity,
It is the desirable material of zinc alkene coating.The magnesium-aluminum spinel ceramic powder synthesized under high temperature can be added to painting directly as filler
In material, the addition of the ceramic packing in post-coatings preparation process is reduced, the production process of zinc alkene coating is optimized.
Prepare graphene ceramic slurry embodiment 1:
By the graphene ceramic composite powder of 6 mass parts, the solvent of the dispersant B YK110 of 1 mass parts and 50 mass parts
(mixed solvent that dimethylbenzene and n-butanol are formed with mass ratio 4:1) mixing, stirs evenly, and obtains the graphene pottery of embodiment 1
Porcelain slurry, the visible attached drawing 8 of schematic diagram.
Prepare graphene ceramic slurry embodiment 2:
By the graphene ceramic composite powder of 10 mass parts, the solvent of the dispersant B YK110 of 2 mass parts and 68 mass parts
(mixed solvent that dimethylbenzene and n-butanol are formed with mass ratio 4:1) mixing, stirs evenly, and obtains the graphene pottery of embodiment 2
Porcelain slurry.
Prepare graphene ceramic slurry embodiment 3:
By the graphene ceramic composite powder of 5 mass parts, the solvent of the dispersant B YK110 of 1 mass parts and 74 mass parts
(mixed solvent that dimethylbenzene and n-butanol are formed with mass ratio 4:1) mixing, stirs evenly, and obtains the graphene pottery of embodiment 3
Porcelain slurry.
Prepare graphene film zinc composite heavy corrosion protection Paint Examples 1:
The epoxy resin of 25 mass parts, the bleeding agent of 1 mass parts and 25 mass parts solvents are mixed evenly, are added
The piece shape zinc powder of 18 mass parts, the filler of 20 mass parts, 1 mass parts levelling agent, be mixed evenly, be ground to fineness be 30
μm, the graphene ceramic slurry that 10 mass parts are then added is mixed evenly, and crosses 80 mesh screens, it is compound to obtain graphene film zinc
Anticorrosive paint.
Epoxy resin used is E-44 epoxy resin；Bleeding agent is AEO3；Solvent is dimethylbenzene and n-butanol with quality
Than the mixed solvent of 4:1 composition；The average grain diameter of zinc flake is 15 μm, radius-thickness ratio 40:1, bulk density 1.5kg/L,
Specific surface area is 1.2m2/ g, oil absorption 22mL/100g；Filler is talcum powder；Levelling agent is organobentonite；Graphene pottery
Porcelain slurry is the graphene ceramic slurry for preparing graphene ceramic slurry embodiment 1 and obtaining.
Prepare graphene film zinc composite heavy corrosion protection Paint Examples 2:
The epoxy resin of 27 mass parts, the bleeding agent of 2 mass parts and 30 mass parts solvents are mixed evenly, are added
The piece shape zinc powder of 20 mass parts, the filler of 12 mass parts, the levelling agent of 2 mass parts and the defoaming agent of 1 mass parts are mixed equal
Even, being ground to fineness is 30 μm, and the graphene ceramic slurry that 8 mass parts are then added is mixed evenly, and crosses 80 mesh screens, obtains
To graphene film zinc composite heavy corrosion protection coating.
Epoxy resin used is E-44 epoxy resin；Bleeding agent is AEO3；Solvent is dimethylbenzene and n-butanol with quality
Than the mixed solvent of 4:1 composition；The average grain diameter of zinc flake is 15 μm, radius-thickness ratio 40:1, bulk density 1.5kg/L,
Specific surface area is 1.2m2/ g, oil absorption 22mL/100g；Filler is talcum powder；Levelling agent is organobentonite；Defoaming agent is
BYK054；Graphene ceramic slurry is the graphene ceramic slurry for preparing graphene ceramic slurry embodiment 1 and obtaining.
Prepare graphene film zinc composite heavy corrosion protection Paint Examples 3:
The epoxy resin of 32 mass parts, the bleeding agent of 1 mass parts and 20 mass parts solvents are mixed evenly, are added
The piece shape zinc powder of 15 mass parts, the filler of 15 mass parts, the levelling agent of 1 mass parts and the defoaming agent of 1 mass parts are mixed equal
Even, being ground to fineness is 30 μm, and the graphene ceramic slurry that 5 mass parts are then added is mixed evenly, and crosses 80 mesh screens, obtains
To graphene film zinc composite heavy corrosion protection coating.
Epoxy resin used is E-44 epoxy resin；Bleeding agent is AEO3；Solvent is dimethylbenzene and n-butanol with quality
Than the mixed solvent of 4:1 composition；The average grain diameter of piece shape zinc powder is 15 μm, radius-thickness ratio 40:1, bulk density 1.5kg/L,
Specific surface area is 1.2m2/ g, oil absorption 22mL/100g；Filler is talcum powder；Levelling agent is organobentonite；Defoaming agent is
BYK054；Graphene ceramic slurry is the graphene ceramic slurry for preparing graphene ceramic slurry embodiment 1 and obtaining.
Prepare graphene film zinc composite heavy corrosion protection coating comparative example 1:
Piece shape zinc powder used in graphene film zinc composite heavy corrosion protection Paint Examples 1 will be prepared and change spherical zinc powder, institute into
Ball zinc average grain diameter is 3 μm, radius-thickness ratio 1.5:1, bulk density 2.5kg/L, specific surface area 0.4m2/ g, oil suction
Amount is 6.5mL/100g.Remaining raw material of comparative example 1 is identical with preparation method, thus obtains the zinc alkene anticorrosive paint of comparative example 1.
The zinc alkene anticorrosive paint and triethylene tetramine curing agent that embodiment 1 and comparative example 1 are prepared are with mass ratio 5:1
It is mixed, coating is made in obtained coating and is tested, project detected presses the progress of state's calibration method, testing result
As shown in table 2.
2 zinc alkene anticorrosive paint contrast test result of table
Attached drawing 9 is the salt spray test comparison diagram of piece shape Yu spherical zinc powder coating.The piece shape of embodiment 1 is shown on the left of Fig. 9
Zinc alkene anticorrosive paint salt spray test is as a result, show the spherical zinc alkene anticorrosive paint salt spray test result of comparative example 1 on the right side of Fig. 9.
The coating salt fog cross cut test of embodiment 1 does not become rusty for 3000 hours, and the coating salt fog cross cut test of comparative example 1 gets rusty for 1000 hours.
Construction method embodiment:
One, workpiece surface to be onstructed is surface-treated, removes impurity and pollutant；
Two, the graphene film zinc composite heavy corrosion protection coating that embodiment 1 is prepared and with triethylene tetramine curing agent with
Mass ratio 5:1 is mixed evenly, and obtains construction paint；
Three, construction paint is sprayed or is brushed in workpiece surface to be onstructed.
It is further illustrated as follows:
One, it is surface-treated
1, all surfaces to be coated should all be cleaned, dry, is pollution-free.Before japanning, all surface should all basis
ISO8504:2000 standard is assessed and is handled；Oil or grease should clear up standard by SSPC-SP-1 solvent and remove.
2, blasting by abrasives is cleared up:
Steel surface spray treatment is to Sa21/2(ISO 8501-1:2007) or SSPC-SP10 standard.If spraying
After processing, apply epoxy zinc rich primer front surface aoxidize, then the surface should spray treatment again, reach defined mesh
Sighting target is quasi-.
The surface defect of exposure during spray treatment, it should polish, fill up or handle in the right way.It is recommended that surface
Roughness is 40~70 μm.
3, weld seam and failure area should do spray treatment, reach Sa21/2(ISO 8501-1:2007) or SSPC-SP6 mark
It is quasi-.
Two, construction requirement
Product of the present invention divides dual-pack, forms a unit.It every time must be disposable mixed in pairs according to the specified ratio
It closes, and is finished in defined be used in mixed way in the time limit.
(1) with power blender stirring graphene film zinc composite heavy corrosion protection coating (base material A).
(2) whole curing agent (B) and base-material (A) are reconciled together, is thoroughly stirred with power blender.
Mixed construction paint service life is as follows: at 40 DEG C at 2 hours, 25 DEG C 12 hours, 5 DEG C at 5 hours, 15 DEG C
Lower 24 hours.
Three, construction method and parameter declaration are as follows:
Practical spreading rate: considering loss factor appropriate, is 0.85~0.95；
Coating method: including airless spraying, aerial spraying or brushing；
1, airless spraying
Using nozzle diameter 0.43-0.53mm (17-21 millimeter), paint pressure is not less than 176 kilograms/square at nozzle
Centimetre.
2, aerial spraying (band pressurized tank)
Use spray gun: DeVilbiss MBC or JGA；Air capacity: 704 or 765；Nozzle: E.
3, it brushes
It is only repaired with small range, 50-75 μm of typical thickness.
Coating road number: 1~2；
Construction paint drying time is as shown in table 3.
3 construction paint drying time of table
| Temperature | Surface drying time | Dry-hard time | Minimum, which is covered, applies the time | Maximum, which is covered, applies the time |
| 5℃ | 12 hours | 24 hours | 24 hours | Without limitation |
| 15℃ | 8 hours | 18 hours | 18 hours | Without limitation |
| 25℃ | 6 hours | 12 hours | 12 hours | Without limitation |
| 40℃ | 3 hours | 6 hours | 6 hours | Without limitation |
Above-mentioned technological parameter is only for reference, and it is appropriate to be carried out according to construction actual operation and ambient conditions when construction
Adjustment.
The present invention uses the preferable resin of permeability for base-material, is cooperated by means of bleeding agent, polar solvent, makes coating over the ground
Being surface-treated surface has good permeability, so that infiltration and infiltration rusty scale, are closed, and then reach permanent protective property efficiency
Fruit.Coating after low prepared surface designs can tolerate steel through simple or remaining after pretreatment by hand rust staining, oxidation
Skin, various old coatings, moisture, salinity, greasy dirt etc., can also tolerate the environmental factors such as high temperature, low temperature, high humility.
Show 2400 hours salt of graphene film zinc anticorrosive paint of the invention through the detection of naval vessels coating inspection center
Mist test has the resisting salt fog corrosion characteristic being better than compared to traditional zinc-rich anticorrosion coat, and protective benefits improve 2 times.Product is
It was tried out in 2017 at PCK steel pipe factory Zhuhai building site scene of carrying out, can reach Sa2 grades or more of requirement, user's evaluation effect is good
It is good.
Claims (10)
1. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating, it is characterised in that: the following steps are included:
1) graphene ceramic composite powder is prepared
First magnesium powder and alumina powder are uniformly mixed, then obtained mixed powder is placed in reactor, in carbon dioxide atmosphere
Under, it is powered and induces self-propagating combustion reaction, it is cooling, obtain graphene ceramic composite powder；
2) graphene ceramic slurry is prepared
By the graphene ceramic composite powder of 5~10 mass parts, the solvent of the dispersing agent of 1~5 mass parts and 50~80 mass parts
Mixing, stirs evenly, obtains graphene ceramic slurry；
3) graphene film zinc composite heavy corrosion protection coating is prepared
The epoxy resin of 20~40 mass parts, the bleeding agent of 1~5 mass parts and 10~40 mass parts solvents are mixed equal
It is even, the piece shape zinc powder, the filler of 10~30 mass parts and the auxiliary agent of 1~10 mass parts of 10~20 mass parts are added, mixing is stirred
It mixes uniformly, grinding, the graphene ceramic slurry that 5~20 mass parts are then added is mixed evenly, and filters, obtains graphene film
Zinc composite heavy corrosion protection coating.
2. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 1, it is characterised in that: system
In standby graphene ceramic composite powder, the mass ratio of alumina powder and magnesium powder is (4~5): 1.
3. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 1, it is characterised in that: system
In standby graphene ceramic composite powder, the pressure of carbon dioxide atmosphere is 0.4MPa~0.6MPa in reactor.
4. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 1, it is characterised in that: system
In standby graphene ceramic composite powder, the induction self-propagating combustion reaction that is powered is specially that the tungsten filament coil of energization 40A~60A induces
Self-propagating combustion reaction occurs for mixed powder.
5. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 1, it is characterised in that: system
In standby graphene slurry, at least one of dispersing agent BYK110, BYK161, BYK170 dispersing agent.
6. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 1, it is characterised in that: system
In standby graphene film zinc composite heavy corrosion protection coating, epoxy resin is E-51 epoxy resin, E-44 epoxy resin, E-20 asphalt mixtures modified by epoxy resin
At least one of rouge, DER331 epoxy resin, DER671 epoxy resin, CYD011 epoxy resin；Bleeding agent is polyoxyethylene
Ether compound；Filler is talcum powder, lithopone, mica powder, blanc fixe, trbasic zinc phosphate, at least one in nano silica
Kind；Auxiliary agent is at least one of levelling agent, coupling agent, defoaming agent.
7. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 6, it is characterised in that: system
In standby graphene film zinc composite heavy corrosion protection coating, it is ground to be ground to fineness≤50 μm；It was filtered into 50 mesh~100 mesh sieve
Net.
8. a kind of preparation method of graphene film zinc composite heavy corrosion protection coating according to claim 5 or 6, feature exist
In: solvent is toluene, dimethylbenzene, methanol, ethyl alcohol, n-butanol, ether, acetone, tetrahydrofuran, N,N-dimethylformamide, two
At least one of methyl sulfoxide.
9. a kind of construction method of graphene film zinc composite heavy corrosion protection coating, it is characterised in that: the following steps are included:
S1: being surface-treated workpiece surface to be onstructed, removes impurity and pollutant；
S2: the graphene film zinc composite heavy corrosion protection coating and curing agent that any one of claim 1~8 is prepared are mixed
Uniformly, construction paint is obtained；
S3: construction paint is sprayed or is brushed in workpiece surface to be onstructed.
10. a kind of construction method of graphene film zinc composite heavy corrosion protection coating according to claim 9, it is characterised in that:
In S2, the mass ratio of graphene film zinc composite heavy corrosion protection coating and curing agent is (4~6): 1.
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| WO2024038200A1 (en) * | 2022-08-18 | 2024-02-22 | Sparc Technologies Limited | Anticorrosive coating composition comprising graphene |
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