Glue heavy anti-corrosion environment-friendly coating and preparation method thereof

Abstract

The invention relates to the field of environment-friendly coatings, and discloses a colloidal heavy anti-corrosion environment-friendly coating and a preparation method thereof.The colloidal heavy anti-corrosion environment-friendly coating is prepared from 35%-42% of a basic film forming matrix, 15%-22% of an anti-oxidation waterproof material, 3%-7% of bionic hydrophobic filler, 5%-9% of a densification enhancing auxiliary, 1%-1.8% of an interface optimizing auxiliary, 0.8%-1.4% of an environment-friendly component, 8%-11% of a curing agent and the balance deionized water, the basic film-forming substrate comprises a waterborne epoxy emulsion serving as a film-forming carrier; the antioxidant waterproof material comprises 90-95% of hydrocarbon wax, 2-5% of a hindered phenol antioxidant and 1-3% of graphene nanosheets, the melting point of the hydrocarbon wax is 75-85 DEG C, and the number of layers of the graphene nanosheets is 5-10. Through targeted formula design, the antioxidant waterproof material is used for delaying aging of hydrocarbon wax, the bionic hydrophobic filler is used for constructing a lotus effect, the densification enhancing additive fills pores and is matched with the interface optimization additive to improve compatibility, the problems of coating water drop permeation and gap expansion under alternating humidity are effectively solved, corrosion medium permeation and base material corrosion are prevented, and the service life of the coating is prolonged. And the method is suitable for special scenes with large humidity height difference.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environment-friendly coatings, in particular to a colloidal heavy-duty corrosion-resistant environment-friendly coating and a preparation method thereof. BACKGROUND

[0002] With the increasing demand for long-term corrosion protection in the fields of marine engineering, chemical equipment, municipal bridges, etc., heavy-duty corrosion-resistant coatings need to meet the dual requirements of "high protection performance" and "environmental compliance". The current industry mainstream has shifted from traditional solvent-based coatings to water-based, solvent-free and other environmentally friendly systems to reduce VOC emissions and comply with environmental standards such as GB30981-2020. At the same time, for special scenarios such as marine tidal zones and high-humidity chemical workshops, coatings also need to withstand long-term humidity fluctuations, salt spray corrosion and other abilities to avoid structural failure of the substrate due to corrosion, which puts higher requirements on the density, hydrophobicity and environmental stability of the coating.

[0003] In the prior art, the colloidal heavy-duty corrosion-resistant system represented by Diling coating has achieved a breakthrough by introducing hydrocarbon wax as a hydrophobic core, water-based epoxy emulsion as a film-forming matrix, and titanium-based nanofiller and other additives to improve the density of the coating and significantly optimize the static corrosion resistance.

[0004] However, considering the alternating humidity dynamic conditions in some special scenarios such as daily "immersion-drying" cycles in marine tidal zones and "high-humidity-low-humidity" alternations in chemical workshops, the existing colloidal heavy-duty corrosion-resistant environment-friendly coating has problems such as aging and deterioration of the water-repellent wax layer, leading to water droplets adhering to the outer wall of the coating and slowly penetrating, and the coating expanding and contracting with humidity changes, further expanding the gap and accelerating the penetration of corrosive media, peeling off the coating-substrate interface, and ultimately causing a chain of problems such as substrate corrosion failure. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a colloidal heavy-duty corrosion-resistant environment-friendly coating and a preparation method thereof, which solves the problems of aging of the coating material under alternating humidity dynamic conditions, water droplet penetration, and expansion and contraction of the coating with humidity changes to expand the gap.

[0006] To achieve the above purpose, the present application realizes the following technical scheme: a colloidal heavy-duty corrosion-resistant environment-friendly coating, comprising a basic film-forming matrix 35-42%, an antioxidant waterproof material 15-22%, a biomimetic hydrophobic filler 3-7%, an enhanced dense additive 5-9%, an interface optimization additive 1-1.8%, an environmentally friendly additive 0.8-1.4%, a curing agent 8-11%, and deionized water to make up the balance.

[0007] Preferably, the base film-forming matrix comprises: an aqueous epoxy emulsion as a film-forming carrier, providing coating base adhesion and corrosion protection framework.

[0008] Preferably, the antioxidant waterproof material comprises: hydrocarbon wax 90-95%, hindered phenolic antioxidant 2-5%, graphene nanosheet 1-3%, and the melting point of the hydrocarbon wax is 75-85℃, the number of layers of the graphene nanosheet is 5-10 layers, and the antioxidant effect of the coating is improved.

[0009] Preferably, the biomimetic hydrophobic filler comprises: silane-modified silica microspheres for constructing a lotus effect microstructure.

[0010] Preferably, the reinforcing and densifying aid agent comprises: titanium-based nanocomposite filler for filling micro-pores in the coating.

[0011] Preferably, the interface optimization aid agent comprises: a silane coupling agent for enhancing the interface bonding between the filler and the matrix.

[0012] Preferably, the environmental protection aid agent comprises: an aqueous dispersant 66-67% and an aqueous defoaming agent 33-34%, the aqueous dispersant ensures uniform dispersion of each group of materials, and the aqueous defoaming agent eliminates bubbles generated during preparation.

[0013] Preferably, the curing agent comprises an aqueous amine curing agent, which is cured at room temperature, and forms a cross-linked and dense network after curing.

[0014] A preparation method of a colloidal heavy-duty corrosion-resistant and environmentally friendly coating, comprising the following steps: S1, preparing a modified hydrocarbon wax composite system: The hydrocarbon wax is added to the reaction kettle, and the reaction kettle is heated to 80-90℃, so that the temperature of the reaction kettle is greater than the melting point of the wax by 5-10℃, ensuring complete melting, and the reaction kettle is started for stirring at a stirring rate of 500-800rpm for 10-15min; The hindered phenolic antioxidant is then added to the molten wax, and the reaction kettle is continuously started for stirring for 10-15min until complete dissolution, and then the stirring rate is reduced to 200-300rpm, the graphene nanosheet is slowly added, and the temperature is increased to 90-95℃, and the stirring rate of the reaction kettle is increased to 3000-5000rpm, and high-speed shearing is performed for 30min to form a uniform modified hydrocarbon wax emulsion; S2, preparing silane-modified silica microspheres: The silica microspheres and ethanol are poured into an ultrasonic dispersing machine and ultrasonic dispersed for 15-20min to form a microsphere suspension with a mass fraction of 8-10%; Then pour the suspension and silane coupling agent into the blender, and raise the blender temperature to 60-70℃, the stirring rate is 800-1000rpm, and the reaction is carried out for 2-3h to ensure complete grafting of the silane, to obtain a silane grafted silica microsphere suspension; After waiting for the reaction to end, the silane grafted silica microsphere suspension is obtained, added to a centrifuge, centrifuged at a speed of 7000-8000rpm for 10-20min, and then the solid precipitate after centrifugation is taken out, washed with ethanol for 3-5 times, and placed in a vacuum drying machine, the temperature is adjusted to 75-80℃, and vacuum drying is carried out for 1.5-2h, to obtain hydrophobically modified silica microspheres; S3, preparing a coating body: A reaction kettle is used, and an aqueous epoxy emulsion is added, the stirring rate is 600-800rpm, and the modified hydrocarbon wax emulsion prepared in step S1 is slowly added during stirring, and the mixture is stirred for 12-15min; Then the titanium-based nanocomposite filler, the aqueous dispersing agent, and the aqueous defoaming agent are sequentially added, and the stirring rate of the reaction kettle is increased to 1300-1500rpm, and the dispersion is carried out for 15-20min; And the silane modified silica microspheres prepared in step 2 and the silane coupling agent are added, and the stirring rate of the reaction kettle is controlled to remain at 1200-1500rpm, and the dispersion is carried out for 25-30min; Finally, deionized water is added to adjust the viscosity to 50-80s, to obtain the coating body; S4, preparing a finished product coating: The coating body is naturally cooled to room temperature of 25-30℃, and the water-based amine curing agent is added within 1h before construction, according to the mass ratio of the aqueous epoxy emulsion to the water-based amine curing agent = 4:1, the stirring rate is 300-500rpm, and the mixture is stirred for 10-15min, to obtain the finished product colloidal heavy-duty anti-corrosion environmentally friendly coating.

[0015] The present application provides a colloidal heavy-duty anti-corrosion environmentally friendly coating and a preparation method thereof. The present application has the following beneficial effects: 1、The present application uses targeted formula design, uses antioxidant waterproof materials to delay the aging of hydrocarbon wax, uses biomimetic hydrophobic fillers to construct lotus effect, uses enhanced dense additives to fill pores, and uses interface optimization additives to improve compatibility, effectively solves the problems of water droplet penetration and crack expansion of the coating under alternating humidity, prevents corrosion medium penetration and substrate corrosion, and adapts to special scenes with large humidity difference.

[0016] 2、The present application uses environmentally friendly components such as aqueous epoxy emulsion, has zero VOC emission and meets environmental protection standards, and the coating can be cured at room temperature, the viscosity can be adjusted, and various construction methods are compatible, which takes into account environmental protection and construction practicability, reduces construction difficulty and energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The preparation method flow chart of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application specification. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Embodiment: Please refer to the drawings of the present application Figure 1 The embodiment of the present application provides a colloidal heavy anti-corrosion environment-friendly coating, which comprises a basic film-forming matrix 35-42%, an oxidation-resistant waterproof material 15-22%, a biomimetic hydrophobic filler 3-7%, an enhanced dense additive 5-9%, an interface optimization additive 1-1.8%, an environment-friendly agent 0.8-1.4%, a curing agent 8-11%, and deionized water to make up the balance.

[0020] The basic film-forming matrix comprises a water-based epoxy emulsion as a film-forming carrier, which provides the basic adhesion and corrosion-resistant framework of the coating. The oxidation-resistant waterproof material comprises hydrocarbon wax 90-95%, hindered phenolic antioxidant 2-5%, and graphene nanosheet 1-3%, and the melting point of the hydrocarbon wax is 75-85℃, and the number of layers of the graphene nanosheet is 5-10. The graphene synchronously improves the barrier property and oxidation resistance of the wax, and solves the oxidation problem of the wax component. The biomimetic hydrophobic filler comprises silane-modified silica microspheres, which are used to construct a lotus effect microstructure and form a hierarchical structure of "micron protrusions and nanometer roughness" to improve the surface hydrophobicity and durability. The enhanced dense additive comprises titanium-based nanocomposite filler, which is used to fill the micro-pores of the coating, has good compatibility with the matrix, and cooperatively improves the density and reduces the moisture permeation channel of the coating. The interface optimization additive comprises a silane coupling agent, which is used to enhance the interface bonding between the filler and the matrix, solve the compatibility problem of the oxidation-resistant waterproof material, the biomimetic hydrophobic filler, and the basic film-forming matrix, and avoid interface peeling under dynamic circulation. The environment-friendly agent comprises water-based dispersant 66-67% and water-based defoaming agent 33-34%. The water-based dispersant ensures uniform dispersion of each component without VOC emission, and the water-based defoaming agent eliminates the bubbles generated during the preparation process to avoid the formation of moisture permeation pores. The curing agent comprises a water-based amine curing agent, which is cured at room temperature and is environment-friendly and formaldehyde-free. After curing, a cross-linked dense network is formed to further improve the moisture expansion and shrinkage resistance of the material.

[0021] A preparation method of a colloidal heavy anti-corrosion environment-friendly paint, comprising the following steps: S1, preparing a modified carbon hydrocarbon wax composite system: The carbon hydrocarbon wax is added to the reaction kettle, and the reaction kettle is heated to 80-90℃, so that the temperature of the reaction kettle is greater than the melting point of the wax by 5-10℃, ensuring complete melting, and the reaction kettle is started for stirring at a stirring rate of 500-800rpm for 10-15min, ensuring complete melting of the carbon hydrocarbon wax to carry subsequent additives through precise temperature control and gradient stirring; Then, a hindered phenolic antioxidant is added to the molten wax, and the reaction kettle is continuously started for stirring for 10-15min until complete dissolution, and then the stirring rate is reduced to 200-300rpm, the graphene nanosheet is slowly added, and the temperature is increased to 90-95℃, and the stirring rate of the reaction kettle is increased to 3000-5000rpm for high-speed shearing for 30min to form a uniform modified carbon hydrocarbon wax emulsion, and the low-speed addition of graphene avoids agglomeration, and finally the high-speed shearing realizes the uniform compounding of "carbon hydrocarbon wax-hindered phenol-graphene"; It should be noted that the hindered phenolic antioxidant can be embedded in the wax molecular chain in advance to delay oxidation, and the graphene nanosheet can construct a physical barrier layer, and the dual effects can improve the oxidation resistance of the modified wax emulsion by more than 40%, laying a foundation for the long-term hydrophobicity of the subsequent coating under alternating humidity; S2, preparing silane-modified silica microspheres: The silica microspheres and ethanol are poured into an ultrasonic dispersing machine and ultrasonic dispersed for 15-20min to break the agglomeration of the silica microspheres and ensure uniform grafting of silane in the subsequent step, forming a microsphere suspension with a mass fraction of 8-10%; Then, the suspension and silane coupling agent are poured into a stirrer, and the temperature of the stirrer is increased to 60-70℃, which is the optimal temperature for hydrolysis and grafting of the silane coupling agent, and the reaction is carried out for 2-3h to ensure complete grafting of silane molecules to the surface of the microspheres, and the stirring rate is 800-1000rpm, and the reaction is carried out for 2-3h to ensure complete grafting of silane, obtaining a silane-grafted silica microsphere suspension; After the reaction is completed, the silane-grafted silica microsphere suspension is obtained, and is added to a centrifuge, and is centrifuged at a speed of 7000-8000rpm for 10-20min to remove free silane, and then the solid precipitate after centrifugation is taken out, washed with ethanol for 3-5 times, and placed in a vacuum drying machine, and the temperature is adjusted to 75-80℃ for vacuum drying for 1.5-2h, and the vacuum drying at 75-80℃ avoids secondary agglomeration of the microspheres, obtaining hydrophobic modified silica microspheres, and the final hydrophobic modified silica microspheres have a water contact angle of ≥120°, can construct a stable "micron protrusion-nanometer roughness" lotus effect structure on the surface of the coating, and reduce water droplet adhesion and initial penetration; S3, preparing a paint main body: Use the reaction kettle, and add the aqueous epoxy emulsion, the stirring rate is 600-800 rpm, and the modified hydrocarbon wax emulsion prepared in step S1 is slowly added in the stirring process, stirring, mixing for 12-15 min, the modified wax emulsion is mixed with the epoxy emulsion at a low speed of 600-800 rpm, so that the wax emulsion is prevented from crystallizing due to temperature difference, and the hydrophobic ingredients are uniformly dispersed; Then, the titanium-based nano composite filler, the water-based dispersing agent and the water-based defoaming agent are sequentially added, the stirring speed of the reaction kettle is increased to 1300-1500 rpm, and the dispersion is performed for 15-20 min; the titanium-based nano composite filler is dispersed at a high speed of 1300-1500 rpm, so that the filler can fully fill the micro-pores of the coating, and the water-based dispersing agent and the defoaming agent are used to prevent agglomeration and remove bubbles, thereby improving the density of the coating. Then, the titanium-based nano composite filler, the water-based dispersing agent and the water-based defoaming agent are sequentially added, the stirring speed of the reaction kettle is increased to 1300-1500 rpm, and the dispersion is performed for 15-20 min; the titanium-based nano composite filler is dispersed at a high speed of 1300-1500 rpm, so that the filler can fully fill the micro-pores of the coating, and the water-based dispersing agent and the defoaming agent are used to prevent agglomeration and remove bubbles, thereby improving the density of the coating. Finally, deionized water is added to adjust the viscosity to 50-80 s, and the coating main body is obtained. S4, preparation of finished paint: The coating main body is naturally cooled to room temperature of 25-30 DEG C, and the natural cooling to 25-30 DEG C can prevent the activity of the water-based amine curing agent from being damaged at high temperature, so that the curing reaction is stable, and the water-based amine curing agent is added within 1 h before construction to prevent the coating from being cured in advance and invalid, the water-based amine curing agent is added according to the mass ratio of water-based epoxy emulsion: water-based amine curing agent = 4:1, the stirring speed is 300-500 rpm, and the mixing time is 10-15 min, so that the finished colloidal heavy-duty anti-corrosion environmental protection coating is obtained, the cross-linked dense network is formed after curing, the anti-wet expansion and dry shrinkage capacity is improved by more than 30%, and zero VOC emission is achieved, so that the construction property, environmental protection and corrosion resistance are considered.

[0022] Example one: The example of the present application provides a colloidal heavy-duty anti-corrosion environmental protection coating, which comprises a basic film-forming matrix 35%, an antioxidant waterproof material 15%, a biomimetic hydrophobic filler 3%, an enhanced dense additive 5%, an interface optimization additive 1%, an environmental protection additive 0.8%, a curing agent 8% and deionized water to make up the balance.

[0023] Example one is the minimum ratio of the present application, and example one focuses on the basic heavy-duty anti-corrosion and environmental protection performance as the core, and considers the high economy, so as to adapt to the mild corrosion scene with low anti-corrosion requirement and limited budget.

[0024] Example two: The embodiment of the application provides a colloidal heavy-duty anticorrosive environment-friendly paint, which comprises a basic film-forming matrix 38.5%, an antioxidant waterproof material 18.5%, a biomimetic hydrophobic filler 5%, an enhanced dense additive 7%, an interface optimization additive 1.4%, an environment-friendly additive 1.1%, a curing agent 9.5% and deionized water in a residual amount.

[0025] Example two is a medium ratio in the application, and example two focuses on balanced comprehensive performance and high cost performance, meets the needs of moderate to severe corrosion protection, and is suitable for various construction methods, covering mainstream heavy-duty anticorrosion scenes such as municipal and industrial equipment.

[0026] Example three: The embodiment of the application provides a colloidal heavy-duty anticorrosive environment-friendly paint, which comprises a basic film-forming matrix 42%, an antioxidant waterproof material 22%, a biomimetic hydrophobic filler 7%, an enhanced dense additive 9%, an interface optimization additive 1.8%, an environment-friendly additive 1.4%, a curing agent 11% and deionized water in a residual amount.

[0027] Example three is the largest ratio in the application, and example three focuses on high performance and long service life in extreme environments, and has the best protection capability in harsh working conditions such as high humidity and high salt, and large temperature and humidity fluctuations, and is suitable for high-end demand scenes such as marine engineering and key chemical projects.

[0028] Comparative experiment: I. Preparation of experimental samples Substrate treatment: Q235 steel plates (150mmx70mmx3mm) are used for sand blasting treatment according to GB / T13288-2019 “Visual evaluation of surface cleanliness of steel surface before coating with paint”, to achieve Sa2.5 level, and the surface roughness is Ra50-80um; Coating construction: the three groups of example paints are all constructed by air spraying, the wet film thickness is controlled to be 100um, the room temperature (25℃, RH50%) is cured for 7d, and the dry film thickness is 80±5um after drying; Sample quantity: 10 parallel samples are prepared for each example for different performance tests.

[0029] II. Specific experimental projects and methods 1. Neutral salt spray test (core index of corrosion resistance) Standard: GB / T1771-2021 “Determination of the resistance of pigments and varnishes to neutral salt spray” Experimental parameters: Salt spray solution: 5% (mass fraction) NaCl solution, pH 6.5-7.2; Test temperature: 35℃; Salt spray deposition amount: 1.0-2.0mL / (h·80cm²); Test cycle: 5000h for Example One, 8000h for Example Two, 15000h for Example Three; Evaluation method: observed once every 1000h, rated according to the standard: ① rust rating (0 level: no rust; 1 level: rust area <5%); ② blister rating (0 level: no blister; 1 level: bubble diameter <0.5mm, number <5 / dm²).

[0030] 2. Alternating humidity cycle test (dynamic humidity adaptability) Execution standard: "Cyclic condensation test" in GB / T1865-2009 "Artificial climate aging and artificial radiation exposure of color paint and varnish" (national standard method instead of ASTM G154) Experimental parameters: Cycle period: 12h / cycle (8h condensation stage: temperature 40℃, relative humidity 100%; 4h drying stage: temperature 60℃, relative humidity 30%); Total test duration: 4000h; Correlation detection: test the moisture permeability according to GB / T17146-2015 "Building material water vapor transmission performance test method" after the test, unit: mg / (m²・day).

[0031] 3. Adhesion test (interface bonding performance) Execution standard: GB / T5210-2006 "Color paint and varnish adhesion test by pull-off method" Experimental parameters: Adhesive: epoxy structural adhesive (shear strength ≥15MPa); Test rate: 5mm / min; Sampling method: test 5 points for each group of samples, and take the average value; Evaluation standard: adhesion ≥20MPa is qualified, record the failure mode of each group (cohesion failure / interface failure, interface failure accounts for <10% is excellent).

[0032] 4. VOC content test (environmental protection performance) Execution standard: Appendix A of GB30981-2020 "Limit of harmful substances in industrial protective coating" Experimental parameters: Test method: gas chromatography (GC-FID); Sample weighing: 2.0g (accurate to 0.0001g); Solvent: ethyl acetate (chromatographic pure); Evaluation standard: VOC content ≤100g / L is qualified (limit of water-based industrial anticorrosive coating).

[0033] 5. Anti-wet expansion and shrinkage performance (coating stability) Execution standard: "Low temperature flexibility + heat resistance cycle test" in GB / T 16777-2008 "Test methods of building waterproof coating" Experimental parameters: Cycle condition: -20℃ freezing for 2h→70℃ baking for 2h, a total of 500 cycles; Post-test inspection: whether the coating appears cracking, peeling, and microscopic defects on the surface are observed by microscope (100 times).

[0034] Three, experimental results record and comparison

[0035] Four, experimental conclusion Corrosion resistance and dynamic humidity adaptability: Example three has the highest dosage of antioxidant waterproof material and reinforcing and compacting additives, and performs best in salt spray test and alternating humidity cycle; Example one meets the basic corrosion resistance requirement and is suitable for mild corrosion scenarios; Interface and stability: with the increase of the dosage of interface optimization additives, the adhesion of the three groups is improved in turn, and the interface of Example three is the tightest, and the defects after wet expansion and dry shrinkage are the least; Environmental protection: all the three groups meet the environmental protection requirement of GB30981-2020, and the VOC content slightly decreases with the optimization of water-based components, and the overall environmental protection is excellent.

[0036] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A colloidal, heavy-duty, anti-corrosion, and environmentally friendly coating, characterized in that, The composition includes: 35-42% basic film-forming matrix, 15-22% antioxidant and waterproof material, 3-7% biomimetic hydrophobic filler, 5-9% reinforcing and densifying agent, 1-1.8% interface optimization agent, 0.8-1.4% environmentally friendly agent, 8-11% curing agent, and deionized water to make up the balance. The antioxidant and waterproof material is used to delay the aging and deterioration of hydrocarbon wax. It enhances antioxidant properties and barrier properties through the synergistic effect of hindered phenolic antioxidants and graphene nanosheets, thereby reducing water droplet adhesion and penetration. The biomimetic hydrophobic filler is used to construct a lotus leaf effect microstructure with "micron-sized protrusions and nano-sized roughness" to improve the hydrophobic durability of the coating surface and reduce the initial penetration probability of water droplets.

2. The adhesive-based, heavy-duty, anti-corrosion, and environmentally friendly coating according to claim 1, characterized in that, The basic film-forming substrate includes an aqueous epoxy emulsion, which serves as a film-forming carrier and provides basic adhesion and anti-corrosion support for the coating.

3. The adhesive-weight anti-corrosion and environmentally friendly coating according to claim 1, characterized in that, The antioxidant and waterproof material comprises: 90-95% hydrocarbon wax, 2-5% hindered phenolic antioxidant, and 1-3% graphene nanosheets. The hydrocarbon wax has a melting point of 75-85℃, and the graphene nanosheets have 5-10 layers, thereby improving the antioxidant effect of the coating.

4. The adhesive-weight anti-corrosion and environmentally friendly coating according to claim 1, characterized in that, The biomimetic hydrophobic filler includes silane-modified silica microspheres, used to construct lotus leaf effect microstructures.

5. The adhesive-based, heavy-duty, anti-corrosion, and environmentally friendly coating according to claim 1, characterized in that, The reinforcing and densifying agent includes: titanium-based nanocomposite filler, used to fill the micropores in the coating.

6. The adhesive-weight anti-corrosion and environmentally friendly coating according to claim 1, characterized in that, The interface optimization aids include: silane coupling agents, used to enhance the interfacial bonding between the filler and the matrix.

7. The adhesive-weight anti-corrosion and environmentally friendly coating according to claim 1, characterized in that, The environmentally friendly additives include: 66-67% water-based dispersant and 33-34% water-based defoamer. The water-based dispersant ensures that the materials are evenly dispersed, while the water-based defoamer eliminates bubbles generated during the preparation process.

8. The adhesive-weight anti-corrosion and environmentally friendly coating according to claim 1, characterized in that, The curing agent includes an aqueous amine curing agent, which is cured at room temperature to form a cross-linked dense network after curing.

9. A method for preparing a colloidal, heavy-duty, anti-corrosion, and environmentally friendly coating according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Preparation of modified hydrocarbon wax composite system: Add hydrocarbon wax to the reactor and heat the reactor to 80-90℃, so that the temperature of the reactor is 5-10℃ higher than the melting point of the wax to ensure complete melting. Start stirring in the reactor at a stirring speed of 500-800 rpm and keep it at this temperature for 10-15 minutes. Add hindered phenolic antioxidants to the molten wax, and continue stirring in the reactor for 10-15 minutes until completely dissolved. Then reduce the stirring speed to 200-300 rpm, slowly add graphene nanosheets, and then heat to 90-95℃. Increase the stirring speed of the reactor to 3000-5000 rpm and perform high-speed shearing for 30 minutes to form a uniform modified hydrocarbon wax emulsion. S2. Preparation of silane-modified silica microspheres: Add silica microspheres and ethanol into an ultrasonic disperser and ultrasonically disperse for 15-20 minutes to form a microsphere suspension with a mass fraction of 8-10%. The suspension and silane coupling agent are then poured into a mixer, and the mixer temperature is raised to 60-70℃. The stirring speed is 800-1000 rpm, and the reaction is carried out for 2-3 hours to ensure complete silane grafting, thus obtaining a silane-grafted silica microsphere suspension. After the reaction is complete, the resulting silane-grafted silica microsphere suspension is added to a centrifuge and centrifuged at 7000-8000 rpm for 10-20 minutes. The solid precipitate after centrifugation is then removed, washed with ethanol 3-5 times, and placed in a vacuum dryer. The temperature is adjusted to 75-80℃ and vacuum dried for 1.5-2 hours to obtain hydrophobic modified silica microspheres. S3. Preparation of the coating substrate: Use a reaction vessel and add an aqueous epoxy emulsion. Stir at 600-800 rpm and slowly add the modified hydrocarbon wax emulsion prepared in step S1 while stirring. Mix for 12-15 minutes. Then add titanium-based nanocomposite filler, water-based dispersant, and water-based defoamer in sequence, and increase the stirring speed of the reactor to 1300-1500 rpm, and disperse for 15-20 min; Add the silane-modified silica microspheres and silane coupling agent prepared in step 2, and control the stirring speed of the reactor to maintain 1200-1500 rpm for 25-30 min; Finally, add deionized water to adjust the viscosity to 50-80s to obtain the main body of the coating; S4. Preparation of finished coating: Allow the coating to cool naturally to room temperature (25-30℃). Within 1 hour before application, add water-based amine curing agent at a mass ratio of 4:1 (water-based epoxy emulsion: water-based amine curing agent). Stir at 300-500 rpm for 10-15 minutes to obtain the finished adhesive-weight anti-corrosion and environmentally friendly coating.

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