CN113831774A - Weather-proof and corrosion-proof integrated coating material and preparation method thereof - Google Patents

Abstract

The invention discloses a weather-resistant and corrosion-resistant integrated coating material and a preparation method and application thereof, wherein the weather-resistant and corrosion-resistant integrated coating material comprises a component A, a component B and a component C, wherein the component A is a mixture of aqueous silicate and amine salt or derivatives thereof; the component B is a mixture of oxide powder, phosphorus flake or fiber and metal powder; and the component C is a mixture of a liquid polysulfide rubber epoxy group coupling agent modifier and sulfur-containing silane. The coating material of the invention has the characteristics of cement carbonization and corrosion prevention, steel corrosion prevention and excellent weather resistance, and the VOC content of the coating material is lower than 120 g/L.

Description

Weather-proof and corrosion-proof integrated coating material and preparation method thereof

Technical Field

The invention relates to a weather-resistant anticorrosive coating, in particular to a weather-resistant anticorrosive integrated coating material with low VOC content for a public pipe gallery in a seaside chemical industry environment and a preparation method thereof.

Background

China has 1.8-kilo-kilometer coastlines, and a plurality of heavy projects such as petroleum and chemical engineering are distributed on the long coastlines. Coastal areas and along rivers are always the major capital for the development of the chemical industry in China, and the pattern goes through the long evolution process of hundreds of years from the germination stage to the development stage and then to the tripod stage. The national ministry of environmental protection has conducted some investigation, and the results of the investigation show that more than 80% of the national chemical industry projects are distributed in regions such as rivers and seas. City and regional planning department of the environmental college of Beijing university is Lu bin: "if the large and small petrochemical projects are marked on the map, the coastline can be enclosed into a circle. "

A common pipe gallery of a chemical engineering area is formed by centralizing a plurality of pipelines in factories of the chemical industry and related categories, distributing the pipelines along the outside of a device or a factory building, generally in the air, and supporting the pipelines by utilizing a support to form a similar appearance of the gallery. In addition, a portion of the pipe gallery is located underground. The pipeline of the large-scale installation is generally a main place for centralized laying, and is composed of columns, beams, trusses and the like of a steel structure or a reinforced concrete structure, and can be divided into a single-layer structure or a multi-layer structure, a passable type or a non-passable type according to the corresponding types.

The pipe gallery is affected by environmental conditions such as sunlight irradiation, wind and rain, temperature change and the like in the environment, so that serious corrosion is generated, and even the stress state of the pipeline is changed due to the influence on the strength; and the environment that is in public piping lane under the seaside chemical industry environment is more abominable, and is more complicated to the anticorrosion technique under the more general condition. The causes of severe corrosion are generally considered to be mainly: (1) atmospheric factors: solar radiation and alternate dryness and wetness; (2) environmental factors: the temperature changes, and the ocean atmosphere is rich in chloride ions, and the industrial atmosphere contains corrosive substances. Therefore, the anti-corrosion coating in the area is required to have the characteristics of good salt mist corrosion resistance, sunlight irradiation aging resistance and high-low temperature alternate change resistance.

Due to the unreasonable layout of the coastal chemical industry in the current stage of China, the large environmental risks are hidden near the chemical industry, for example, a large continuous PX dam break event, and the environmental threats caused by the layout of the coastal chemical industry in China are completely exposed. The original national environmental protection bureau carries out large investigation on the environmental risks of petrochemical projects in China as early as 2006, and the investigation result shows that 7555 chemical and petrochemical construction projects are totally arranged in China at present, wherein about 81 percent of the chemical and petrochemical construction projects are distributed in environment sensitive areas such as river water areas and densely populated areas, and 45 percent of the chemical and petrochemical construction projects are major risk sources. Among the petrochemical projects, 1357 projects are laid along the banks of rivers, lakes, seas and reservoirs, accounting for 17.9%; 24889 people are distributed near the city or in dense population areas, accounting for 32.4 percent. Due to the close proximity to the crowd, if some of these items are destroyed, they can be harmful to nearby people and at the same time cause immeasurable damage to the environment.

VOC is an english abbreviation of volatile organic compound (volaileorganic compound), and is broadly any liquid or solid organic compound that can volatilize in the atmosphere at normal temperature and pressure. Definition of the United states Environmental Protection Agency (EPA) -all carbon compounds participating in atmospheric photochemical reactions, excluding CO, CO₂Carbonic acid, metal carbides or carbonates, and ammonium carbonate. Definition of VOC by the European Union-organic compounds having an initial boiling point of less than or equal to 250 ℃ at standard atmospheric pressure (101.3 kPa). At present, the main stream of anticorrosion coatings is mainly solvent-based coatings, but the problems are that the construction tools of the coatings need to be cleaned by volatile organic solvents, and in the process, the damages to human bodies or the environment are inevitably caused. Therefore, with the development of society and the increasing awareness of environmental protection, the limitation of VOC (volatile organic compound) in solvent-based coatings is also increasing. Thus, it is an urgent task to develop a coating that can meet the performance requirements of people and has a low VOC content.

From several perspectives to solve the problems encountered by marine environmental materials, there is a need to provide a low-VOC-content weather-resistant and corrosion-resistant integrated coating material for public pipe corridors in the seaside chemical industry environment.

Disclosure of Invention

In view of the above, the main object of the present invention is to provide a weather-resistant and corrosion-resistant integrated coating material and a preparation method thereof, wherein the coating material is suitable for outdoor structures in the seaside chemical industry environment, and can also be used for other offshore wind power steel structures or other offshore structures with high requirements for corrosion resistance and weather resistance.

In order to achieve the aim, the invention provides a weather-resistant and corrosion-resistant integrated coating material which comprises a component A, a component B and a component C, wherein the component A is a mixture of aqueous silicate and amine salt or derivatives thereof; the component B is a mixture of oxide powder, phosphorus flake or fiber and metal powder; and the component C is a mixture of a liquid polysulfide rubber epoxy group coupling agent modifier and sulfur-containing silane.

Further, the mass ratio of the component A, the component B and the component C is (1-5): (0.8-2): (2-5).

Further wherein the aqueous silicate is at least one of silicates having a modulus of 3.3 to 6.5.

Further wherein the aqueous silicate is selected from at least one of sodium silicate, potassium silicate, lithium silicate and ammonium silicate.

Further, the ammonium salt or the derivative thereof is at least one selected from urea, methyl urea, dimethyl urea, diamine and the derivative thereof, triamine and the derivative thereof and alcohol amine compounds.

Further, the ammonium salt or the derivative thereof is selected from one of polyether amine and ethanolamine; the polyether amine is a mono-amine or a diamine; the ethanolamine is selected from 2-aminoethanol: at least one of ethanolamine, 2-hydroxyethylamine, N-dibutylethanol, dibutylethanolamine, 2-diethylaminoethanol and N, N-diethylethanolamine.

Further, the mass ratio of the amine substances in the aqueous silicate and the amine salt or the derivative thereof is (60-90): (40-10).

Further, the gel time of the component B is 160-200 s, the swelling ratio is 42.33%, and the component B is selected from at least two of cement, fly ash, steel slag powder, glass powder, dry red mud powder, inorganic flaky materials and inorganic chopped fibers; the inorganic flaky material comprises glass flakes, basalt flakes, mica or mica iron oxide; the inorganic chopped fibers comprise glass fibers, basalt fibers or aluminum silicate fibers; the metal powder comprises at least one of titanium powder, zinc powder and aluminum powder.

Further, the mass ratio of the oxide powder, the phosphor flake or the fiber and the metal powder in the component B is (60-90): (40-10).

Further, the sulfur-containing silane is at least one of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black, pre-dispersed JH-S69 coupling agent rubber master batches, bis- [3- (triethoxysilyl) -propyl ] -disulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -disulfide and carbon black, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-thiocyanopropylthoxysilane, multifunctional sulfur-containing silane, alkyl terminated silane and monothiosilane coupling agent.

Further wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following steps: liquid polysulfide rubber, propylene glycol methyl ether acetate or propylene glycol methyl ether, epoxy silane and water are mixed according to the mass ratio of (20-30): (10-20): (15-35): (0.1-1), uniformly mixing, heating to 90-98 ℃, carrying out heat preservation and reflux under nitrogen, and reacting for 24-72 hours to obtain viscous transparent liquid; the mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black is prepared by mixing bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide (50%) and carbon black according to the weight ratio of 1: 1 in a weight ratio; the mixture of bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black is prepared by mixing bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black according to the weight ratio of 1: 1, and mixing the components in a weight ratio.

Further, the mass ratio of the liquid polysulfide rubber epoxy group coupling agent modifier to the sulfur-containing silane is (40-60): (60-40).

Further wherein the coating material has a volume solids content of not less than 95% and a VOC content of 60-120 g/L.

Furthermore, the mixture of the oxides mentioned in the component B can be a mixture of pure oxides, and can also be powder obtained by crushing various wastes, so that the method has the value of resource recycling and has higher cost performance.

In order to achieve the aim, the invention also provides a preparation method of the weather-resistant and corrosion-resistant integrated coating material, which comprises the following steps:

(1) mixing the water-based silicate, the ammonium salt or the derivatives thereof according to the formula amount, stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to obtain a first base material which is uniformly dispersed;

(2) mixing oxide powder, phosphorus flake or fiber and metal powder, stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to obtain a second base material which is uniformly dispersed;

(3) uniformly mixing the first base material in the step (1) and the second base material in the step (2), then sequentially adding 1-3 parts of defoaming agent, 2-3 parts of dispersing agent, 3-5 parts of fumed silica anti-settling agent, 0.5-1.5 parts of organic bentonite, 0.3-0.7 part of polyamide resin and 4-6 parts of ultraviolet absorbent, and uniformly mixing to obtain a resin base material solution;

(4) adding the mixture of the liquid polysulfide rubber epoxy group coupling agent modifier and the sulfur-containing silane in the formula amount into the resin base material solution obtained in the step (3), stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed third base material;

(5) adding the additive into the third base material obtained in the step (4), stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed color paste solution;

(6) adding the third base material obtained in the step (4) into the color paste solution obtained in the step (5), uniformly stirring, coating on a substrate by adopting a spraying process, and naturally placing;

(7) drying the substrate coated with the color paste solution in the step (6), and curing the coating to obtain the weather-resistant and corrosion-resistant integrated coating material; wherein the temperature of the drying environment is 10-40 ℃, and the air drying is carried out naturally; the humidity of the dry environment is 85% or less.

Further, in the step (3), the ultraviolet absorbent is prepared by mixing the components in a mass ratio of 1: 1: 1: 1, UV-292, UV-1130, UV-928 and UV-123.

Further, in the step (5), the additive is composed of barite, platy filler, anticorrosive filler and carbon black pigment, and the addition amount of the additive is 5% -10% of the weight of the third base material.

Compared with the prior art, the invention has the following beneficial effects:

the coating material of the invention has the characteristics of cement carbonization and corrosion prevention, steel corrosion prevention and excellent weather resistance, and the VOC content of the coating material is lower than 120 g/L. The coating has good adhesive force with cement and steel (the adhesive force of a cement substrate is more than 5MPa, and the adhesive force of a steel substrate is about 8MPa), has excellent salt spray resistance, aging resistance and alternate dry and wet change resistance, is suitable for outdoor structures in a seaside chemical environment, and can also be used for other offshore wind power steel structures or other offshore structures with high requirements on corrosion resistance and weather resistance.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following description is given with reference to the preferred embodiments. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions. The following materials or reagents, unless otherwise specified, are all commercially available.

The invention provides a weather-resistant and corrosion-resistant integrated coating material which comprises a component A, a component B and a component C, wherein the component A is a mixture of water-based silicate, amine salt or derivatives thereof; the component B is oxide powder, phosphor flake or fiber and metal powderA mixture of (a); the component C is a mixture of a liquid polysulfide rubber epoxy group coupling agent modifier and sulfur-containing silane, wherein the sulfide bond in a polysulfide rubber skeleton contained in the liquid polysulfide rubber epoxy group coupling agent modifier enables a chain segment to have considerable mobility, so that the whole molecular chain has better flexibility; 2 groups with different chemical properties (epoxy groups and alkoxy groups capable of reacting) are simultaneously arranged in the molecular chain of the epoxy group coupling agent, so that the chemical connection between the reinforcing filler and the rubber can be realized, the compatibility between the reinforcing filler and the rubber is improved, and the dispersion of the reinforcing filler in a rubber matrix is facilitated; the epoxy group coupling agent can participate in the vulcanization reaction of the sizing material during vulcanization due to sulfur atoms contained in molecules; component A, B, C provides reactive groups that can be crosslinked, where component A provides-NH₂(ii) a Component B provides-CH (O) CH-; component C provides-COO-, etc.; the coating after the three reactions has the characteristics of compactness, water resistance and corrosion resistance. The coating material is constructed on cement and steel structures, has good adhesive force with a substrate material, and has multiple characteristics of corrosion resistance, resistance to outdoor environment dry-wet alternation and ultraviolet irradiation.

In specific implementation, the mass ratio of the component A, the component B and the component C is (1-5): (0.8-2): (2-5), the preferable mass ratio is as follows: (2-2.5): (0.8-1.1): (2-3), so that the coating material has better weather resistance and corrosion resistance after being optimized.

In a specific embodiment, the aqueous silicate is at least one silicate having a modulus of 3.3 to 6.5.

In a specific embodiment, the aqueous silicate is at least one selected from the group consisting of sodium silicate, potassium silicate, lithium silicate, and ammonium silicate.

In specific implementation, the ammonium salt or the derivative thereof is at least one selected from urea, methyl urea, dimethyl urea, diamine and the derivative thereof, triamine and the derivative thereof, and an alcohol amine compound.

In specific implementation, the mass ratio of the amine substances in the aqueous silicate and the amine salt or the derivative thereof is (60-90): (40-10), and the preferable mass ratio is (70-85): (30-15), so that the weather resistance and corrosion resistance of the coating material can be improved after preference.

In specific implementation, the ammonium salt or the derivative thereof is selected from one of polyetheramine and ethanolamine; the polyether amine is a mono-amine or a di-amine, and is specifically selected from M-600, M-1000, M-2005, M-2070, T403 and T5000; the ethanolamine is selected from 2-aminoethanol: at least one of ethanolamine, 2-hydroxyethylamine, N-dibutylethanol, dibutylethanolamine, 2-diethylaminoethanol and N, N-diethylethanolamine.

In specific implementation, the component B has the characteristics of hydration and gelation, the gel time is 160-200 s, the swelling ratio is 42.33%, and the component B can be at least two of cement (such as white cement), fly ash, steel slag powder, glass powder, dry red mud powder, inorganic flaky materials and inorganic chopped fibers; the inorganic flaky material comprises glass flakes, basalt flakes, mica or mica iron oxide and the like; the inorganic chopped fibers comprise glass fibers, basalt fibers or aluminum silicate fibers and the like; the metal powder comprises at least one of titanium powder, zinc powder and aluminum powder.

In specific implementation, the mass ratio of the oxide to the metal powder is (60-90): (40-10), preferably (70-80): (30-20), so that the mechanical strength and the corrosion resistance of the coating material can be improved after the coating material is optimized.

In specific implementation, the mass ratio of the liquid polysulfide rubber epoxy group coupling agent modifier to the sulfur-containing silane is (40-60): (60-40), the more optimized mass ratio is as follows: (45-55): (55-45), so that the viscosity of the post-coating material is proper to facilitate construction.

Specifically, the sulfur-containing silane is at least one of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black, pre-dispersed JH-S69 coupling agent rubber master batch (commercially available), bis- [3- (triethoxysilyl) -propyl ] -disulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -disulfide and carbon black, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, multifunctional sulfur-containing silane, alkyl-terminated silane and monothiosilane coupling agent.

In specific implementation, the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following steps: liquid polysulfide rubber, propylene glycol methyl ether acetate (PMA) or propylene glycol methyl ether (PM), epoxy silane and water are mixed according to the mass ratio of (20-30): (10-20): (15-35): (0.1-1), uniformly mixing, heating to 90-98 ℃, carrying out heat preservation and reflux under nitrogen, and reacting for 24-72 hours to obtain viscous transparent liquid; the mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black is prepared by mixing bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide (50%) and carbon black according to the weight ratio of 1: 1 in a weight ratio; the mixture of bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black is prepared by mixing bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black according to the weight ratio of 1: 1, and mixing the components in a weight ratio.

In specific implementation, the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following steps: liquid polysulfide rubber, propylene glycol methyl ether acetate (PMA) or propylene glycol methyl ether (PM), epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

In specific implementation, the liquid polysulfide rubber can be LP-1400, the mercaptan content (wt%) is 612-; LP-33, with a mercaptan content (%) of 510-615, a crosslinker of 15%, and a viscosity (25 ℃, PaS) of 115-210; LP-3, with a mercaptan content (wt%) of 519-717, a crosslinker of 2%, and a viscosity (25 ℃, PaS) of 194-1144; LP-980, a mercaptan content (wt%) of 215-315, a crosslinker of 15, a viscosity (25 ℃, PaS) of 10-15; LP-977, with a mercaptan content (wt%) of 215-315, a crosslinker of 21%, and a viscosity (25 ℃, PaS) of 10-15; LP-541, the mercaptan content (wt%) is 115-210, the cross-linking agent is 0, and the viscosity (25 ℃, PaS) is 41-5215; LP-12, a mercaptan content (wt%) of 115-210, a crosslinker of 12%, a viscosity (25 ℃, PaS) of 51-5215; LP-32 with a mercaptan content (wt%) of 115-215, a crosslinker of 0, a viscosity of 195-1185LP-2, a mercaptan content (wt%) of 115-210, a crosslinker of 2, and a viscosity (25 ℃, PaS) of 41-5215; LP-31, the mercaptan content (wt%) is 110-115, the cross-linking agent is 15%, and the viscosity is 95-115; g-4, a mercaptan content (wt%) of greater than 519, a crosslinker of 210, a viscosity (25 ℃, PaS) of less than 113; g-22, the mercaptan content (wt%) is 211-217, the cross-linking agent is 015, the viscosity (25 ℃, PaS) is 10-20; g-21, the mercaptan content (wt%) is 215-311, the crosslinking agent is 210, and the viscosity (25 ℃, PaS) is 10-20; g-12, a mercaptan content (wt%) of 115-117, a crosslinker of 012, a viscosity (25 ℃, PaS) of 38-50; g-112, a mercaptan content (wt%) of 115-117, a crosslinker of 015, a viscosity (25 ℃, PaS) of 38-50; g-1, the mercaptan content (wt%) is 118-210, the crosslinking agent is 2, and the viscosity (25 ℃, PaS) is 41-52; and G-131, a mercaptan content (wt%) of 110-113, a crosslinker of 015, and a viscosity (25 ℃, PaS) of 80-145.

Specifically, the epoxy silane is at least one selected from the group consisting of 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane and 3-glycidoxypropylmethyldiethoxysilane.

In specific implementation, the volume solid content of the coating material is not less than 95%, and the VOC content is 60-120 g/L.

In specific implementation, the mixture of the oxides mentioned in the component B can be a mixture of pure oxides, and can also be powder obtained by crushing various wastes, so that the method has a resource recycling value and a high cost performance.

The invention also provides a preparation method of the weather-resistant and corrosion-resistant integrated coating material, which comprises the following steps:

(1) mixing the water-based silicate, the ammonium salt or the derivatives thereof according to the formula amount, stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to obtain a first base material which is uniformly dispersed; the rotation speed, time and material temperature are preferably 2500r/min, 30min and 50 ℃, so that the dispersing effect is good after the optimization and the time is short;

(2) mixing oxide powder, phosphorus flake or fiber and metal powder, stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to obtain a second base material which is uniformly dispersed; the rotation speed, time and material temperature are preferably 2500r/min, 30min and 50 ℃, so that the dispersing effect is good after the optimization and the time is short;

(3) uniformly mixing the first base material in the step (1) and the second base material in the step (2), then sequentially adding 1-3 parts of defoaming agent, 2-3 parts of dispersing agent, 3-5 parts of fumed silica anti-settling agent, 0.5-1.5 parts of organic bentonite, 0.3-0.7 part of polyamide resin, 4-6 parts of UV-292, UV-1130, UV-928 and UV-123 mixed ultraviolet absorbent, and uniformly mixing to obtain a resin base material solution; the mass ratio of UV-292, UV-1130, UV-928 and UV-123 in the ultraviolet absorbent is 1: 1: 1: 1;

(4) adding the mixture of the liquid polysulfide rubber epoxy group coupling agent modifier and the sulfur-containing silane in the formula amount into the resin base material solution obtained in the step (3), stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed third base material; the rotation speed, time and material temperature are preferably 2500r/min, 30min and 50 ℃, so that the dispersing effect is good after the optimization and the time is short;

(5) adding the additive into the third base material obtained in the step (4), stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed color paste solution; the rotation speed, time and material temperature are preferably 2500r/min, 30min and 50 ℃, so that the dispersing effect is good after the optimization and the time is short; the additive is prepared from the following components in a mass ratio of 1: 1: 1: 1, the addition amount of the barite, the flaky filler, the anticorrosive filler and the carbon black pigment is 5-10% of the weight of the third base material, and is preferably 8%, so that the weather resistance and the corrosion resistance of the coating are better;

(6) adding the third base material obtained in the step (4) into the color paste solution obtained in the step (5), uniformly stirring, spraying (for example, the spraying rate is 150-;

(7) drying the substrate sprayed with the color paste solution in the step (6), and curing a coating film to obtain a weather-resistant and corrosion-resistant integrated coating material; wherein the temperature of the drying environment is 10-40 ℃, and the drying is carried out naturally; the humidity of the dry environment is 85% or less.

The coating material which is low in VOC content and is used for integrating weather resistance and corrosion resistance of the public pipe gallery in the seaside chemical industry environment is prepared by the preparation method. Meanwhile, the coating has the characteristics of cement carbonization and corrosion resistance, steel corrosion resistance and excellent weather resistance, and the VOC content of the coating material is lower than 120 g/L. The coating has good adhesive force with cement and steel, has excellent salt spray resistance, aging resistance and alternate dry and wet change resistance, is suitable for outdoor structures in a seaside chemical environment, and can also be used for other offshore wind power steel structures or other offshore structures with high requirements on corrosion resistance and weather resistance. The paint has good dispersibility, mechanical property, salt spray corrosion resistance, weather resistance and high and low temperature change resistance, meets the corrosion resistance requirement under the current chemical and marine environmental conditions, and simultaneously performs simple maintenance on the structure to be maintained and achieves good protective performance. The salt spray resistant time of the coating material is 1886-⁴Ω·m²: the hardness of the coating reaches 4H, the wear resistance is 20, the adhesive force grade is 1 grade, the adhesive force with a cement substrate is 3-3.3Mpa, the adhesive force with sand blasting Sa2.5 grade steel is 10.5-12.8Mpa, the VOC content is lower than 120g/L, for example, 60-110g/L, even 60 g/L.

Example 1

The embodiment provides a weather-resistant and corrosion-resistant integrated coating material, and the specific formula of the coating material is shown in table 1.

TABLE 1

(1) The component A comprises: is prepared by mixing 30g of sodium silicate (modulus of 3.3), 60g of potassium silicate (modulus of 4.8) and 10g of triethanolamine;

(2) and B component: consists of 30g of white cement (the granularity is 3-30 microns), 50g of steel slag powder (the granularity is 3-5 microns), 10g of titanium powder (the granularity is 0.5-1 mm) and 10g of basalt scales (the granularity is 30-50 microns);

(3) and C, component C: consists of 50g of liquid polysulfide rubber epoxy group coupling agent modifier, 50g of a mixture of bis- [3- (triethoxy silicon) -propyl ] -tetrasulfide (50 wt%) and carbon black (50 wt%). Wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following method: liquid polysulfide rubber, propylene glycol methyl ether acetate, epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

Example 2

The embodiment provides a weather-resistant and corrosion-resistant integrated coating material, and the specific formula of the coating material is shown in table 2.

TABLE 2

(1) The component A comprises: is prepared by mixing 30g of sodium silicate (modulus of 3.3), 50g of lithium silicate (modulus of 5.0) and 10g of triethanolamine;

(2) and B component: the dust remover consists of 40g of fly ash (the granularity is 3-30 microns), 50g of steel slag powder (the granularity is 3-5 microns), 20g of zinc powder (the granularity is 0.5-1 mm) and 10g of basalt flakes (the granularity is 30-50 microns);

(3) and C, component C: the polysulfide rubber modified material consists of 50g of polysulfide rubber modified material and 50g of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide. Wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following method: liquid polysulfide rubber, propylene glycol methyl ether acetate, epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

Example 3

The embodiment provides a weather-resistant and corrosion-resistant integrated coating material, and the specific formula of the coating material is shown in table 3.

TABLE 3

(1) The component A comprises: is prepared by mixing 30g of potassium silicate (modulus of 3.5), 50g of lithium silicate (modulus of 5.0) and 10g of 2-diethylaminoethanol;

(2) and B component: consists of 50g of glass powder (the granularity is 10-30 microns), 40g of steel slag powder (the granularity is 3-5 microns), 20g of titanium powder (the granularity is 0.5-1 mm) and 10g of glass fiber (the granularity is 5-20 microns);

(3) and C, component C: the adhesive consists of 50g of liquid polysulfide rubber epoxy group coupling agent modifier and 50g of 3-mercaptopropyltriethoxysilane. Wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following method: liquid polysulfide rubber, propylene glycol methyl ether acetate, epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

Example 4

The embodiment provides a weather-resistant and corrosion-resistant integrated coating material, and the specific formula of the coating material is shown in table 4.

TABLE 4

(1) The component A comprises: is prepared by mixing 30g of potassium silicate (modulus of 3.5), 50g of ammonium silicate (modulus of 4.5) and 10g of 2-diethylaminoethanol;

(2) and B component: consists of 50g of dry red mud powder (the granularity is 0.05-0.08 mm), 40g of steel slag powder (the granularity is 3-5 microns), 20g of zinc powder (the granularity is 0.5-1 mm) and 10g of basalt scales (the granularity is 30-50 microns);

(3) and (3) component C: the modified polysulfide rubber epoxy group coupling agent consists of 50g of liquid polysulfide rubber epoxy group coupling agent modified substance and 50g of 3-mercaptopropyl trimethoxy silane. Wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following method: liquid polysulfide rubber, propylene glycol methyl ether acetate, epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

Example 5

The embodiment provides a weather-resistant and corrosion-resistant integrated coating material, and the specific formula of the coating material is shown in table 5.

TABLE 5

(1) The component A comprises: is prepared by mixing 30g of sodium silicate (modulus of 3.3), 50g of ammonium silicate (modulus of 4.5) and 20g of dimethyl urea;

(2) and B component: consists of 50g of fly ash (the granularity is 3-30 microns), 50g of steel slag powder (the granularity is 3-5 microns), 20g of titanium powder (the granularity is 0.5-1 mm) and 10g of mica (the granularity is 0.045 mm);

(3) and (3) component C: the polysulfide rubber coupling agent consists of 50g of liquid polysulfide rubber epoxy group coupling agent modifier and 40g of predispersed JH-S69 coupling agent rubber master batch. Wherein the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following method: liquid polysulfide rubber, propylene glycol methyl ether acetate, epoxy silane and water are mixed according to the mass ratio of 20: 10: 15: 0.1, heating to 98 ℃, keeping the temperature under nitrogen (98 ℃), refluxing (98 ℃) and reacting for 24 hours to obtain viscous transparent liquid.

The weather-resistant and corrosion-resistant integrated coatings described in examples 1 to 5 of the present invention were tested in the following test manners, and the test results are shown in table 6.

Fourier infrared spectroscopy (FT-IR)

The coating is characterized by a Fourier transform infrared spectrometer, and the test conditions are as follows: scanning wavelength 4000-^-1。

The surface appearance characterization of the weather-resistant and corrosion-resistant integrated coating material comprises the following steps: and analyzing the surface appearance and the dispersity of the sample by using a Scanning Electron Microscope (SEM).

The weather-resistant and corrosion-resistant integrated coating material is tested by taking GB/T5210 as a standard in adhesive force, testing the water resistance by taking GB/T1733-93 as a standard in water resistance, testing the cyclic aging time by taking GB/T31415 as a standard in cyclic aging time, and testing the impact resistance by taking GBT 1732-93 as a standard in impact resistance.

The salt spray resistance test box of the weather-resistant and corrosion-resistant integrated coating material is used for testing the corrosion resistance according to the GB/T10125 standard.

And (3) performing impedance spectroscopy (ELS) test and polarization curve test on the weather-resistant and corrosion-resistant integrated coating material by using test and analysis instruments such as an AUTOLAB electrochemical workstation and the like.

Thermal gravimetric analysis (DTG) and differential thermal analysis (DSC) were used to test the thermal stability of the weatherproof, corrosion resistant integrated coating material. N is a radical of₂Atmosphere, rate of temperature rise: 5 ℃/min.

TABLE 6

As can be seen from the test data in Table 6, the coatings prepared in examples 1-5 of the present invention have excellent weatherability and corrosion resistance, and the coatings still have good other properties at low VOC content.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Claims (10)

1. The weather-resistant and corrosion-resistant integrated coating material is characterized by comprising a component A, a component B and a component C, wherein the component A is a mixture of aqueous silicate and amine salt or derivatives thereof; the component B is a mixture of oxide powder, phosphorus flake or fiber and metal powder; and the component C is a mixture of a liquid polysulfide rubber epoxy group coupling agent modifier and sulfur-containing silane.

2. The coating material of claim 1, wherein the mass ratio of the component A, the component B and the component C is (1-5): (0.8-2): (2-5).

3. The coating material of claim 1, wherein the aqueous silicate is at least one of a silicate having a modulus of 3.3 to 6.5; the ammonium salt or the derivative thereof is at least one selected from urea, methyl urea, dimethyl urea, diamine and the derivative thereof, triamine and the derivative thereof and an alcohol amine compound.

4. The coating material of claim 3, wherein the aqueous silicate is selected from at least one of sodium silicate, potassium silicate, lithium silicate, and ammonium silicate; the ammonium salt or the derivative thereof is selected from one of polyether amine and ethanolamine; the polyether amine is a mono-amine or a diamine; the ethanolamine is selected from 2-aminoethanol: at least one of ethanolamine, 2-hydroxyethylamine, N-dibutylethanol, dibutylethanolamine, 2-diethylaminoethanol and N, N-diethylethanolamine.

5. The coating material of claim 4, wherein the mass ratio of the amine substances in the aqueous silicate and the amine salt or the derivative thereof is (60-90): (40-10).

6. The coating material of claim 1, wherein the component B has a gel time of 160s to 200s, a swelling ratio of 42.33%, and is selected from at least two of cement, fly ash, steel slag powder, glass powder, dried red mud powder, inorganic flake materials, and inorganic chopped fibers; the inorganic flaky material comprises glass flakes, basalt flakes, mica or mica iron oxide; the inorganic chopped fibers comprise glass fibers, basalt fibers or aluminum silicate fibers; the metal powder comprises at least one of titanium powder, zinc powder and aluminum powder; the mass ratio of the oxide powder, the phosphor flake or the fiber and the metal powder in the component B is (60-90): (40-10).

7. The coating material of claim 1, wherein the sulfur-containing silane is at least one of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black, pre-dispersed JH-S69 coupling agent rubber masterbatch, bis- [3- (triethoxysilyl) -propyl ] -disulfide, a mixture of bis- [3- (triethoxysilyl) -propyl ] -disulfide and carbon black, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, multifunctional sulfur-containing silane, alkyl-terminated silane, and monothiosilane coupling agent; the liquid polysulfide rubber epoxy group coupling agent modifier is prepared by the following steps: liquid polysulfide rubber, propylene glycol methyl ether acetate or propylene glycol methyl ether, epoxy silane and water are mixed according to the mass ratio of (20-30): (10-20): (15-35): (0.1-1), uniformly mixing, heating to 90-98 ℃, carrying out heat preservation and reflux under nitrogen, and reacting for 24-72 hours to obtain viscous transparent liquid; the mixture of bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide and carbon black is prepared by mixing bis- [3- (triethoxysilyl) -propyl ] -tetrasulfide (50%) and carbon black according to the weight ratio of 1: 1 in a weight ratio; the mixture of bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black is prepared by mixing bis- [3- (triethoxy silicon) -propyl ] -disulfide and carbon black according to the weight ratio of 1: 1, and mixing the components in a weight ratio.

8. The coating material of claim 7, wherein the mass ratio of the liquid polysulfide rubber epoxy group coupling agent modifier to the sulfur-containing silane is (40-60): (60-40).

9. The coating material of claim 1, wherein the coating material has a volume solids content of not less than 95% and a VOC content of 60-120 g/L.

10. A method for preparing the weather-resistant corrosion-resistant integrated coating material according to any one of claims 1 to 9, which comprises the following steps:

(1) mixing the water-based silicate, the ammonium salt or the derivatives thereof according to the formula amount, stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to obtain a first base material which is uniformly dispersed;

(2) mixing oxide powder, phosphorus flake or fiber and metal powder, stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to obtain a second base material which is uniformly dispersed;

(3) uniformly mixing the first base material in the step (1) and the second base material in the step (2), then sequentially adding 1-3 parts of defoaming agent, 2-3 parts of dispersing agent, 3-5 parts of fumed silica anti-settling agent, 0.5-1.5 parts of organic bentonite, 0.3-0.7 part of polyamide resin and 4-6 parts of ultraviolet absorbent, and uniformly mixing to obtain a resin base material solution; the ultraviolet absorbent is prepared from the following components in percentage by mass of 1: 1: 1: 1, UV-292, UV-1130, UV-928 and UV-123;

(4) adding the mixture of the liquid polysulfide rubber epoxy group coupling agent modifier and the sulfur-containing silane in the formula amount into the resin base material solution obtained in the step (3), stirring at the rotating speed of 2000-3000r/min for 20-40 minutes, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed third base material;

(5) adding the additive into the third base material obtained in the step (4), stirring for 20-40 minutes at the rotating speed of 2000-3000r/min, and controlling the material temperature below 50 ℃ to prepare a uniformly dispersed color paste solution; the additive consists of barite, flaky filler, anticorrosive filler and carbon black pigment, and the addition amount of the additive is 5-10% of the weight of the third base material;

(6) adding the third base material obtained in the step (4) into the color paste solution obtained in the step (5), uniformly stirring, coating on a substrate by adopting a spraying process, and naturally placing;

(7) drying the substrate coated with the color paste solution in the step (6), and curing the coating to obtain the weather-resistant and corrosion-resistant integrated coating material; wherein the temperature of the drying environment is 10-40 ℃; the humidity of the dry environment is 85% or less.