Water-based mortar anti-corrosion coatings, concrete structures and their applications in radiation environments

Abstract

The present invention provides a kind of water-based mortar anticorrosive coating, concrete structure and its application in radiation environment.The water-based mortar anticorrosive coating includes component A and component B mixed in use, and by mass, component A includes 80-90 parts of film-forming resin, 1-3 parts of detergent and 5-15 parts of water; component B includes 60-70 parts of cement, 20-30 parts of filler and 1-3 parts of anti-sagging aid; wherein, the film-forming resin includes micro-nano epoxy-modified acrylate resin, and its raw materials include 20-30 parts by mass of self-emulsifying epoxy emulsion, 1-3 parts by mass of cosolvent, 70-80 parts by mass of acrylic resin and catalyst.The water-based mortar anticorrosive coating provided by the present invention has good corrosion resistance, radiation resistance, thick coating and thick coating crack resistance, and can be applied in water intake tunnels, water intake corridors, water diversion pipelines and other high humidity, multi-void, a small amount of cracks and other harsh places with radiation environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a water-based mortar anti-corrosion coating, a concrete structure and applications thereof in a radiation environment. Background Art

[0002] The uranium-based nuclear fuel in a nuclear power plant undergoes fission within the reactor, generating a large amount of heat. This heat is then extracted by high-pressure seawater, producing steam in a steam generator. This steam drives a turbine that rotates along with the generator, generating a continuous flow of electricity that is then distributed to all directions via the power grid. The typical engineering conditions for seawater intake tunnels and seawater diversion pipelines vary depending on the choice of nuclear power plant, but generally, the following characteristics apply: the water velocity in the intake tunnel is approximately 0.6 m / s, and the water velocity in the main cooling water inlet gallery is approximately 2.5 m / s. During the commissioning period (approximately one and a half years), the water velocity in the tunnels and galleries is close to zero. Due to the presence of large amounts of floating algae in seawater, the high humidity and open water environment can lead to corrosion in underground seawater intake tunnels and seawater diversion pipelines. Furthermore, the harsh environment, such as the attachment of marine organisms and low-dose radiation, poses significant challenges to tunnel operation and maintenance. Since the base of seawater tunnels and seawater diversion pipelines used in nuclear power plants is the natural surface after lining concrete pouring (without other treatment), its surface is uneven and has a small number of cracks. The coating formed on it by the anti-corrosion coatings in the existing technology has poor adhesion and is easy to fall off; in addition, due to the high humidity environment, the concrete surface is prone to water seepage and has crystals, and the surface is damp, etc., which makes it difficult to apply general anti-corrosion coatings on it, or the formed coating is difficult to maintain a good anti-corrosion effect in harsh environments. Summary of the Invention

[0003] In order to solve all or part of the above technical problems, the present invention provides the following technical solutions:

[0004] One of the objects of the present invention is to provide a water-based mortar anti-corrosion coating, comprising component A and component B to be mixed when used, wherein, by weight, component A comprises 80-90 parts of a film-forming resin, 1-3 parts of a detergent, and 5-15 parts of water; and component B comprises 60-70 parts of cement, 20-30 parts of a filler, and 1-3 parts of an anti-sagging agent.

[0005] The film-forming resin includes micro-nano epoxy-modified acrylate resin, and the raw materials of the micro-nano epoxy-modified acrylate resin include 20 to 30 parts by mass of self-emulsifying epoxy emulsion, 1 to 3 parts by mass of cosolvent, 70 to 80 parts by mass of acrylic resin and catalyst.

[0006] The micro-nano epoxy modified acrylate resin has a small particle size, excellent permeability and excellent adhesion; and has good construction performance, can be constructed in a high humidity environment, can be constructed on a concrete surface with many gaps and cracks to form a coating with good adhesion, and can be used as a film-forming substance in anti-corrosion coatings. The water-based mortar anti-corrosion coating has excellent anti-corrosion performance, can meet the flash rust problem of metal embedded parts, and improves the shortcomings of water-based anti-corrosion coatings in metal substrates; and has good thick coating properties; has a certain decontamination ability, and can prevent the adsorption of marine organisms and the like; the coating formed by the anti-corrosion coating has good radiation resistance and can be used in radiation environments; the anti-corrosion coating is a two-component package, and the independent packaging of cement effectively solves the transportation and use stability of cement, and the two components can also improve the convenience of construction.

[0007] In some embodiments, the particle size of the micro-nano epoxy-modified acrylate resin is 0.2-0.3 μm.

[0008] The self-emulsifying epoxy emulsion can be any commercially available self-emulsifying epoxy emulsion. In some embodiments, the self-emulsifying epoxy emulsion includes MAINCOTE TM One or more of AEH-20 (Rohm and Haas International Trading (Shanghai) Co., Ltd.), XBC660 (Shenzhen Xingbaichuan Technology Co., Ltd.) or WEP-5153 (Shanghai Junjiang New Materials Sales Co., Ltd.), but not limited thereto.

[0009] In some embodiments, the cosolvent includes an ether cosolvent, such as, but not limited to, a combination of one or more of propylene glycol monomethyl ether, dipropylene glycol butyl ether, or diethylene glycol monobutyl ether. The cosolvent can adjust the hydrophilic and lipophilic properties of the micro-nano epoxy-modified acrylate resin, making it suitable for application on high-humidity, high-porosity concrete surfaces, and even on concrete substrates with slight water content, while forming a coating with good adhesion.

[0010] In some embodiments, the catalyst includes one or more of tetrafluoroboric acid, perchloric acid, or trifluoromethanesulfonic acid, but is not limited thereto.

[0011] In some preferred embodiments, the acrylic resin is an emulsion-type acrylic resin. Compared to other types of acrylic resins, the anti-corrosion coating prepared therefrom exhibits superior adhesion and radiation resistance. The emulsion-type acrylic resin includes, for example, a combination of one or more of pure acrylic emulsion, silicone acrylic emulsion, styrene acrylic emulsion, or acetate acrylic emulsion, but is not limited thereto.

[0012] In some embodiments, the preparation method of the micro-nano epoxy-modified acrylate resin includes: mixing the self-emulsifying epoxy emulsion, cosolvent, catalyst and acrylic resin at a temperature of 50-55°C to form a uniform mixture; then adjusting the temperature of the mixture to 55°C-60°C for reaction to obtain the micro-nano epoxy-modified acrylate resin.

[0013] In some embodiments, the preparation method specifically includes:

[0014] The self-emulsifying epoxy emulsion is heated to 50-55° C., and then a cosolvent, a catalyst and an acrylic resin are added thereto in sequence, wherein the cosolvent, the catalyst and the acrylic resin are added in batches and stirred during the addition process; after the acrylic resin is added, the temperature is adjusted to 55-60° C. and high-speed dispersion (maintained at 3000-3500 r / min) is carried out for 1-2 hours to obtain the micro-nano epoxy-modified acrylate resin.

[0015] In a typical embodiment, the preparation method includes the following steps: heating 20 to 30 parts of a self-emulsifying epoxy emulsion to 50-55°C, and stabilizing the stirring speed to 3000-3500 r / min; then dropping 1-3 parts of a cosolvent into the self-emulsifying epoxy emulsion within 20-30 minutes, and maintaining the temperature for 1-2 hours; then slowly adding a catalyst thereto, stirring at 800-1000 r / min for 5 minutes, and maintaining the temperature at 50-55°C; then dropping 70-80 parts of an acrylic resin thereto within 30-50 minutes, raising the temperature to 55-60°C, and dispersing at a high speed (maintained at 3000-3500 r / min) for 1-2 hours to obtain a micro-nano epoxy-modified acrylate resin with a particle size of 0.2-0.3 μm.

[0016] In some embodiments, component A further comprises 0.3-1.0 parts of a rust inhibitor. The rust inhibitor may be any one or more combinations of rust inhibitors known in the art, and the present invention is not particularly limited thereto. In some embodiments, the rust inhibitor comprises one or more of an organic alcohol amine and a nitrite.

[0017] The detergent can be any one or more detergents in the art, and the present invention does not specifically limit this. In some embodiments, the detergent includes a combination of one or more of non-ionized polyethylene glycol non-hydroxy ethers and fatty acid sodium salts.

[0018] In some embodiments, the cement includes a combination of one or more of microfiber cement, fly ash cement, or pozzolana cement.

[0019] In some preferred embodiments, the cement comprises microfiber cement. Compared to fly ash cement or pozzolana cement, microfiber cement exhibits superior wettability and dispersion in micro-nano epoxy-modified acrylate resins, resulting in superior film strength and density, thereby improving adhesion to the substrate.

[0020] In some embodiments, the filler includes one or more of quartz powder, artificial glass fiber, or talc powder.

[0021] In some preferred embodiments, the filler includes quartz powder, synthetic glass fiber, and talcum powder. The combined use of these three ingredients can improve the coating's crack resistance during thick coating, preventing the coating from cracking or falling off when applied to cracked concrete surfaces. Furthermore, the filler preferably includes quartz powder, synthetic glass fiber, and talcum powder in a mass ratio of 60-70:5-10:10-20. Within this mass ratio range, the thick coating exhibits even better crack resistance.

[0022] The anti-sagging agent can be any one or a combination of any of the anti-sagging agents known in the art, and the present invention is not particularly limited thereto. The anti-sagging agent is preferably a powdered anti-sagging agent. In some embodiments, the anti-sagging agent comprises a combination of one or more of hydroxyethyl cellulose, aqueous bentonite, or aqueous polyamide wax, but is not limited thereto.

[0023] In some embodiments, when the water-based mortar anti-corrosion coating is used, the component A and the component B are mixed in a mass ratio of 60-80:20-40.

[0024] A second object of the present invention is to provide a concrete structure comprising a concrete substrate and an anti-corrosion coating applied thereon, the anti-corrosion coating comprising a cured product of the water-based mortar anti-corrosion coating. The concrete substrate may be, for example, a high-porosity substrate with cracks that is susceptible to high humidity or radiation environments. The water-based mortar anti-corrosion coating of the present invention can form an anti-corrosion coating on the surface thereof that exhibits excellent adhesion, corrosion resistance, and radiation resistance.

[0025] The third object of the present invention is to provide the application of the water-based mortar anti-corrosion coating in the anti-corrosion of liquid transportation structures.

[0026] In some embodiments, the liquid transport structure includes a seawater transport structure in a radiation environment, such as a water intake tunnel or water diversion pipeline for a nuclear power plant, or other liquid transport structures formed by a high-humidity and high-voidity concrete substrate.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] (1) The present invention uses micro-nano epoxy-modified acrylate resin as a film-forming substance to prepare a water-based mortar anti-corrosion coating, which has both the strong adhesion and radiation resistance of epoxy and the air-drying drying ability of acrylic acid. The present invention adjusts the hydrophilic and lipophilic ends of the micro-nano epoxy-modified acrylate resin by using a cosolvent to make it suitable for construction under high humidity conditions, and can form a coating with good adhesion on the surface of a concrete substrate with slightly visible water.

[0029] (2) The anti-corrosion coating provided by the present invention has good thick coating properties and thick coating crack resistance. A single coat can be applied to a thickness of 2-3 mm, and can form a smooth coating that is not prone to cracking or falling off on a cracked concrete surface. Furthermore, adding artificial glass fiber to the filler can further improve the thick coating crack resistance, especially when quartz powder, artificial glass fiber and talcum powder are compounded in a certain mass ratio to form a filler, the effect is better. The coating also has excellent corrosion resistance and decontamination ability.

[0030] (3) Furthermore, the coating formed by the micro-nano epoxy-modified acrylate resin and microfiber cement has better strength and density, thereby improving the adhesion between the coating and the substrate.

[0031] (4) The water-based mortar anti-corrosion coating provided by the present invention can be applied in harsh places with high humidity, multiple voids, a small number of cracks, and other radiation environments such as water intake tunnels, water intake corridors, and water diversion pipes of nuclear power plants. It has extremely strong adhesion to the concrete surface of the inner wall of the pipe; it has excellent filling and corrosion resistance, and has excellent airtightness and anti-fouling properties, and meets the radiation resistance of a certain dose; this coating is a two-component package, and the independent packaging of cement effectively solves the transportation and use stability of cement. The two components can also improve the convenience of construction; this coating meets the protection requirements of high-humidity and high-void concrete surfaces, and can even be constructed on concrete substrates with slight visible water, effectively filling the anti-corrosion gaps and construction limitations of surfaces such as nuclear power plant water intake tunnels, greatly improving the life of underground wading tunnels and reducing maintenance costs. DETAILED DESCRIPTION

[0032] The technical solutions of the present invention are described in detail below in conjunction with specific embodiments so that those skilled in the art can better understand and implement the technical solutions of the present invention. The specific functional details disclosed herein should not be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching those skilled in the art to employ the present invention in various ways in virtually any appropriate detailed embodiment.

[0033] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in this field can be used. If the manufacturer of the reagents or instruments is not specified, they are all commercially available conventional reagents.

[0034] Unless otherwise specified, the raw materials and reagents used in the present invention are all commercially available. For example, the raw materials used in the following examples and comparative examples are as follows:

[0035] The self-emulsifying epoxy emulsion MAINCOTE used to prepare the micro-nano epoxy-modified acrylate resin A-1 in Examples 1-6 TM AEH-20 was purchased from Rohm and Haas International Trading (Shanghai) Co., Ltd.;

[0036] The NY-128 epoxy resin used to prepare the film-forming resin B in Comparative Examples 1-4 was purchased from Nanya Resins Company;

[0037] The water-based phenyl acrylic resin used as the film-forming resin in Comparative Examples 5-7 is Dow's MAINCOTE TM HG-300;

[0038] In Comparative Examples 8-10, the common waterborne epoxy resin used as the film-forming resin is Beckopox EP147w from Allnex;

[0039] The anti-sagging agent used in the examples and comparative examples is a product of Hemingway Chemical Co., Ltd., model number BenTone EW, which is a powdered montmorillonite clay rheological agent; the rust inhibitor used is a product of Hofmann Chemical Co., Ltd. The quartz sand and quartz powder used are GSF-1 from Chuzhou Gree, the artificial glass fiber is MS600-R0xu11000 from Lapiuns, and the talc powder is 800 mesh talc powder from Guangxi Longsheng Lily Chemical Co., Ltd.

[0040] Example 1

[0041] This embodiment provides a micro-nano epoxy-modified acrylate resin and a preparation method thereof, as well as a water-based mortar anti-corrosion coating containing the micro-nano epoxy-modified acrylate resin.

[0042] The preparation method of micro-nano epoxy modified acrylate resin is as follows:

[0043] Step 1: Add 25 parts by weight of self-emulsifying epoxy emulsion MAINCOTE TM AEH-20 (Rohm and Haas International Trading (Shanghai) Co., Ltd.) was added to a heat-insulating stirring container, and heated to 53°C with high-speed mechanical stirring. The stirring speed was stabilized at 3200 r / min and maintained for 25 min to obtain liquid 1;

[0044] Step 2: Then, 2 parts by weight of the co-solvent dipropylene glycol butyl ether was slowly added dropwise to liquid 1 over a total time of 25 minutes, and the temperature was maintained at 53° C. for 1 hour to obtain liquid 2;

[0045] Step 3: Slowly add tetrafluoroboric acid catalyst to liquid 2, stir at medium speed for 5 minutes, at which time the stirring speed is 900 r / min, and the temperature is maintained at 53°C to obtain liquid 3;

[0046] Step 4: Slowly add 75 parts by weight of acrylic resin (pure acrylic emulsion) and add the total amount dropwise to liquid 3 over a total time of 40 minutes. The temperature is raised to 58°C and the mixture is kept heat-sealed and dispersed at high speed for 2 hours or more. The particle size is tested to be 0.2-0.3 μm, thereby obtaining a micro-nano epoxy-modified acrylic resin, which is recorded as A-1.

[0047] The above-mentioned micro-nano epoxy-modified acrylate resin is used as a film-forming resin to prepare a water-based mortar anti-corrosion coating. The composition of the water-based mortar anti-corrosion coating is as follows, calculated by weight:

[0048] Component A: 85 parts of micro-nano epoxy modified acrylate resin, 0.7 parts of rust inhibitor (Hofmann Chemical Company ), 2.0 parts of detergent (non-ionized polyethylene glycol non-hydroxy ether) and 10 parts of water;

[0049] Component B: 65 parts of 500-mesh microfiber cement, 25 parts of filler and 2 parts of anti-sagging agent (product of Haiming Steqian Company, model BenTone EW), wherein the filler is composed of 800-mesh quartz sand quartz powder, 500-mesh artificial glass fiber and 800-mesh talc powder in a mass ratio of 70:10:20.

[0050] Example 2

[0051] The only difference between Example 2 and Example 1 is that the component B of Example 2 is: 65 parts of 500-mesh fly ash cement, 25 parts of 800-mesh quartz sand and quartz powder, and 2 parts of anti-sagging agent.

[0052] Example 3

[0053] The only difference between Example 3 and Example 1 is that component B of Example 3 is: 65 parts of 500-mesh pozzolan cement, 25 parts of 800-mesh quartz sand and quartz powder, and 2 parts of anti-sagging agent.

[0054] Example 4

[0055] The only difference between Example 4 and Example 1 is that component B of Example 4 is: 65 parts of 500-mesh microfiber cement, 25 parts of filler and 2 parts of anti-sagging agent, wherein the filler is composed of 800-mesh quartz sand quartz powder and 800-mesh talc powder in a mass ratio of 70:20.

[0056] Example 5

[0057] The only difference between Example 5 and Example 1 is that component B of Example 5 is: 65 parts of 500-mesh microfiber cement, 25 parts of filler and 2 parts of anti-sagging agent, wherein the filler is composed of 800-mesh quartz sand quartz powder, 500-mesh artificial glass fiber, and 800-mesh talc powder in a mass ratio of 70:2:25.

[0058] Example 6

[0059] The only difference between Example 6 and Example 1 is that component B of Example 6 is: 65 parts of 500-mesh microfiber cement, 25 parts of filler and 2 parts of anti-sagging agent, wherein the filler is composed of 800-mesh quartz sand quartz powder, 500-mesh artificial glass fiber and 800-mesh talc powder in a mass ratio of 70:15:5.

[0060] Example 7

[0061] This embodiment provides a micro-nano epoxy-modified acrylate resin and a preparation method thereof, as well as a water-based mortar anti-corrosion coating containing the micro-nano epoxy-modified acrylate resin.

[0062] The preparation method of micro-nano epoxy modified acrylate resin is as follows:

[0063] Step 1: 25 parts by weight of self-emulsifying epoxy emulsion XBC660 (Shenzhen Xingbaichuan Technology Co., Ltd.) was added to a stirring container that can be heated and insulated, and the mixture was stirred at high speed and heated to 50° C. The stirring speed was stabilized at 3000 r / min and maintained for 20 minutes to obtain liquid 1;

[0064] Step 2: Then, 2 parts by weight of the co-solvent propylene glycol monomethyl ether was slowly added dropwise to liquid 1 over a total time of 20 minutes, and the temperature was maintained at 50° C. for 1 hour to obtain liquid 2;

[0065] Step 3: Slowly add the catalyst perchloric acid to liquid 2, stir at medium speed for 5 minutes, at this time the stirring speed is 800 r / min, and the temperature is maintained at 50°C to obtain liquid 3;

[0066] Step 4: Slowly add 75 parts by weight of acrylic resin (silicone acrylic emulsion) and add the total amount dropwise to liquid 3 over a total time of 30 minutes. The temperature is raised to 55°C and the mixture is kept sealed and dispersed at high speed for 2 hours or more. The particle size is tested to be 0.2-0.3 μm, thus obtaining a micro-nano epoxy-modified acrylic resin, which is recorded as A-2.

[0067] The above-mentioned micro-nano epoxy-modified acrylate resin is used as a film-forming resin to prepare a water-based mortar anti-corrosion coating. The composition of the water-based mortar anti-corrosion coating is as follows, calculated by weight:

[0068] Component A: 80 parts of micro-nano epoxy-modified acrylate resin A-2, 0.3 parts of rust inhibitor, 1.0 parts of detergent (non-ionized polyethylene glycol non-hydroxy ether) and 8 parts of water;

[0069] Component B: 60 parts of 500-mesh microfiber cement, 20 parts of filler and 1 part of anti-sagging agent (product of Haiming Steqian Company, model BenTone EW), wherein the filler is composed of 800-mesh quartz sand quartz powder, 500-mesh artificial glass fiber and 800-mesh talc powder in a mass ratio of 60:5:10.

[0070] Example 8

[0071] This embodiment provides a micro-nano epoxy-modified acrylate resin and a preparation method thereof, as well as a water-based mortar anti-corrosion coating containing the micro-nano epoxy-modified acrylate resin.

[0072] The preparation method of micro-nano epoxy modified acrylate resin is as follows:

[0073] Step 1: 25 parts by weight of self-emulsifying epoxy emulsion WEP-5153 (Shanghai Junjiang New Materials Sales Co., Ltd.) was added to a heat-insulating stirring container, and the mixture was stirred at high speed and heated to 55° C. The stirring speed was stabilized at 3500 r / min and maintained for 30 minutes to obtain liquid 1;

[0074] Step 2: Then, 2 parts by weight of the co-solvent diethylene glycol monobutyl ether was slowly added dropwise to liquid 1 over a total time of 30 minutes, and the temperature was maintained at 55° C. for 1 hour to obtain liquid 2;

[0075] Step 3: Slowly add trifluoromethanesulfonic acid catalyst to liquid 2, stir at medium speed for 5 minutes, at which time the stirring speed is 1000 r / min and the temperature is maintained at 55°C to obtain liquid 3;

[0076] Step 4: Slowly add 75 parts by weight of acrylic resin (styrene acrylic emulsion) and add the total amount dropwise to liquid 3 over a total time of 50 minutes. The temperature is raised to 60°C and the mixture is kept sealed and dispersed at high speed for 2 hours or more. The particle size is tested to be 0.2-0.3 μm, thereby obtaining a micro-nano epoxy-modified acrylic resin, which is recorded as A-3.

[0077] The above-mentioned micro-nano epoxy-modified acrylate resin is used as a film-forming resin to prepare a water-based mortar anti-corrosion coating. The composition of the water-based mortar anti-corrosion coating is as follows, calculated by weight:

[0078] Component A: 90 parts of micro-nano epoxy-modified acrylate resin A-3, 1.0 part of a rust inhibitor, 3.0 parts of a detergent (non-ionized polyethylene glycol non-hydroxy ether), and 12 parts of water;

[0079] Component B: 70 parts of 500-mesh microfiber cement, 30 parts of filler and 3 parts of anti-sagging agent (product of Haiming Steqian Company, model BenToneEW), wherein the filler is composed of 800-mesh quartz sand quartz powder, 500-mesh artificial glass fiber and 800-mesh talc powder in a mass ratio of 65:8:15.

[0080] Examples 9-11

[0081] The only difference between Examples 9 to 11 and Example 1 is that the relevant components and contents are changed as shown in Table 1, and the rest are implemented in the same manner as Example 1.

[0082] Example 12

[0083] The only difference between Example 12 and Example 1 is that 75 parts of acrylic resin are prepared from Evonik's DEGALAN PM602:PMA=50:25 (mass ratio). In the preparation process of the micro-nano-scale epoxy-modified acrylate resin, 75 parts of pure acrylic emulsion in Example 1 are replaced by 75 parts of acrylic resin prepared in this comparative example. The prepared modified resin is recorded as F, which is used as the film-forming resin formulation component A. The rest is the same as in Example 1.

[0084] Comparative Examples 1 to 4

[0085] Comparative Examples 1 to 4 In the preparation process of micro-nano epoxy modified acrylate resin, the self-emulsifying epoxy emulsion MAINCOTE used in Example 1 was TM AEH-20 was replaced with NY-128 epoxy resin from Nanya Resins Co., Ltd. The obtained product was designated as B and used as the film-forming resin to prepare component A. The compositions of component A and component B of comparative examples 1 to 4 are shown in Table 1.

[0086] Comparative Examples 5 to 7

[0087] The film-forming resin of component A in Comparative Examples 5 to 7 is a common water-based phenyl acrylic resin (denoted as C in Table 1). The compositions of component A and component B in Comparative Examples 5 to 7 are shown in Table 1.

[0088] Comparative Examples 8-10

[0089] The film-forming resin of component A in Comparative Examples 8 to 10 is a common water-based epoxy resin (denoted as D in Table 1). The compositions of component A and component B in Comparative Examples 5 to 7 are shown in Table 1.

[0090] Comparative Example 11

[0091] The only difference between Comparative Example 11 and Example 1 is that no cosolvent is added during the preparation of the micro-nano epoxy-modified acrylate resin. The obtained product is recorded as E. The rest of the process is the same as Example 1.

[0092] Table 1 Composition of water-based mortar anticorrosive coatings in the embodiments of the present invention and comparative examples

[0093]

[0094]

[0095]

[0096] Table 2 Physical property test results of component A in Example 1, Comparative Example 5 and Comparative Example 8

[0097]

[0098] Component A and component B in the above examples and comparative examples were mixed in a mass ratio of 80:20 and applied to a concrete substrate for testing of relevant properties. The specific testing method is as follows:

[0099] The test substrate is a newly poured concrete substrate of 50 cm×50 cm×5 cm. After being soaked in water for 28 days, the vertical surface is directly scraped (with a large amount of visible water on the surface).

[0100] Test basis: Adhesion is tested according to GB / T5210-2006; stain sensitivity is tested according to NB / T 20133.4; radiation resistance is tested according to NB / T 20133.3 procedure b; high-pressure water gun resistance is tested by spraying high-pressure water gun on the paint film for 30 minutes and observing the paint film shedding; thick coating is tested by scraping the vertical surface with a scraper to check for sagging, sagging, etc.; filling performance is tested by scraping the concrete with a scraper to check for depression, drying cracks, etc. in the original holes.

[0101] Table 3 Related properties of the anti-corrosion coatings formed in the embodiments of the present invention and the comparative examples

[0102]

[0103]

[0104]

[0105] The various aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and are not intended to limit the present invention, the scope of which is defined solely by the claims. Other embodiments, modifications and uses will be apparent to those skilled in the art without departing from the spirit and scope of the invention as claimed.

[0106] In addition, the inventors of this case also referred to the aforementioned embodiments and conducted experiments using other raw materials, process operations, and process conditions described in this specification, and obtained relatively ideal results.

[0107] Although the present invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions, and / or additions may be made and that substantial equivalents may be substituted for the elements of the embodiments without departing from the spirit and scope of the present invention. Additionally, many modifications may be made to adapt specific circumstances or materials to the teachings of the present invention without departing from the scope of the present invention. Therefore, it is not intended herein to limit the present invention to the disclosed specific embodiments for carrying out the present invention, but rather to include all embodiments within the scope of the appended claims. Furthermore, unless specifically stated, any use of the terms first, second, etc. does not indicate any order or importance, but rather uses the terms first, second, etc. to distinguish one element from another.

Claims

1. A water-based mortar anti-corrosion coating, characterized by: The water-based mortar anti-corrosion coating comprises component A and component B which are mixed when used, wherein, by weight, component A comprises 80-90 parts of a film-forming resin, 1-3 parts of a detergent, and 5-15 parts of water; and component B comprises 60-70 parts of cement, 20-30 parts of a filler, and 1-3 parts of an anti-sagging agent. The film-forming resin includes a micro-nano epoxy-modified acrylate resin, and the raw materials of the micro-nano epoxy-modified acrylate resin include 20 to 30 parts by mass of a self-emulsifying epoxy emulsion, 1 to 3 parts by mass of a cosolvent, 70 to 80 parts by mass of an acrylic resin, and a catalyst. The preparation method includes: mixing the self-emulsifying epoxy emulsion, the cosolvent, the catalyst, and the acrylic resin at a temperature of 50 to 55° C. to form a uniform mixture; and then adjusting the temperature of the mixture to 55 to 60° C. for reaction to obtain the micro-nano epoxy-modified acrylate resin.

2. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The particle size of the micro-nano epoxy-modified acrylate resin is 0.2-0.3 μm.

3. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The co-solvent includes an ether co-solvent.

4. The water-based mortar anti-corrosion coating according to claim 3, characterized in that: The cosolvent includes one or more of propylene glycol monomethyl ether, dipropylene glycol butyl ether or diethylene glycol monobutyl ether.

5. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The catalyst includes a combination of one or more of tetrafluoroboric acid, perchloric acid or trifluoromethanesulfonic acid.

6. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The acrylic resin includes an emulsion type acrylic resin.

7. The water-based mortar anti-corrosion coating according to claim 6, characterized in that: The acrylic resin includes one or more combinations of pure acrylic emulsion, silicone acrylic emulsion, styrene acrylic emulsion or acetate acrylic emulsion.

8. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The component A further comprises 0.3-1.0 parts of a rust preventive.

9. The water-based mortar anti-corrosion coating according to claim 8, characterized in that: The rust inhibitor includes one or more components of organic alcohol amine and nitrite.

10. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The detergent comprises a combination of one or more of non-ionized polyethylene glycol non-hydroxy ether and fatty acid sodium salt.

11. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The cement comprises one or more of microfiber cement, fly ash cement or pozzolana cement.

12. The water-based mortar anti-corrosion coating according to claim 11, characterized in that: The cement includes microfiber cement.

13. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The filler includes one or more of quartz powder, artificial glass fiber or talc powder.

14. The water-based mortar anti-corrosion coating according to claim 13, characterized in that: The filler comprises quartz powder, artificial glass fiber and talc powder in a mass ratio of 60-70:5-10:10-20.

15. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: The anti-sagging aid includes a combination of one or more of hydroxyethyl cellulose, water-based bentonite or water-based polyamide wax.

16. The water-based mortar anti-corrosion coating according to claim 1, characterized in that: When the water-based mortar anti-corrosion coating is used, the component A and the component B are mixed in a mass ratio of 60-80:20-40.

17. A concrete structure, characterized in that: The concrete structure includes a concrete substrate and an anti-corrosion coating provided on the concrete substrate, wherein the anti-corrosion coating includes a cured product of the water-based mortar anti-corrosion coating according to any one of claims 1 to 16.

18. Use of the water-based mortar anti-corrosion coating according to any one of claims 1 to 16 in the anti-corrosion of liquid transportation structures.

19. The use according to claim 18, characterized in that: The liquid delivery structure includes a seawater delivery structure in a radiation environment.

Images