Corrosion-resistant glass fiber reinforced plastic pipe and preparation process thereof

Abstract

The application provides a kind of corrosion-resistant glass steel pipe and its preparation process, belong to glass steel field;Its raw material composition includes: boron phenolic resin, epoxy vinyl ester resin, high-temperature resistant additive, modified montmorillonite, fluxing agent, garnet micro powder, flame retardant, mica powder, glass fiber, PBO fiber, ethylenediamine and anhydrous ethanol.The application is by first dissolving zirconium oxychloride octahydrate in anhydrous ethanol, then adding acetylacetone, using ketone group and zirconium ion to occur chelation reaction, form stable six-coordination complex, inhibit hydrolysis, then add diphenyl dimethoxysilane and 3-(triethoxysilyl) propyl methacrylate to react, make high-temperature resistant additive containing Si-O-Zr bond, after being added into boron phenolic resin and made into glass steel pipe, can effectively inhibit the escape of resin thermal decomposition product, and then improve the high-temperature resistance of glass steel pipe.

Description

Technical Field

[0001] This invention relates to the field of fiberglass, specifically to a corrosion-resistant fiberglass pipe and its manufacturing process. Background Technology

[0002] Fiberglass reinforced plastic (FRP) pipes are lightweight, high-strength, and corrosion-resistant non-metallic pipes. They are generally made of unsaturated polyester, epoxy resin, and phenolic resin as the matrix and glass fiber as the reinforcing material, using a special process. Due to their advantages such as leak-proofness, light weight, high strength, long service life, strong design flexibility, low fluid resistance, and convenient installation, they are widely used in industries such as petroleum, chemical, pharmaceutical, power, papermaking, urban water supply and drainage, factory sewage treatment, seawater desalination, gas transmission, and mining. They are ideal pipes for transporting liquids and gases.

[0003] Traditional fiberglass pipes are mainly made of epoxy resin or unsaturated polyester resin as the matrix and reinforced with glass fiber. However, the heat distortion temperature of epoxy resin and unsaturated polyester resin is usually below 100℃. They are prone to softening and a sharp drop in mechanical properties at high temperatures. Although phenolic resin has a high char residue rate and low production cost, it is prone to cracking at high temperatures, resulting in a loose and porous carbon layer. This further accelerates the oxidative cracking of the internal structure of the material, which can easily lead to damage to the material's internal structure. This limits its application in high-temperature pipelines.

[0004] In addition, traditional fiberglass pipes have poor resistance to strong oxidizing acids (such as nitric acid and chromic acid) and strong alkalis. Long-term exposure to corrosive media can easily lead to problems such as resin swelling and fiber debonding. While phenolic resin fiberglass has good resistance to non-oxidizing acids, it is prone to hydrolysis in alkaline environments, which limits its application in pipelines transporting highly corrosive media.

[0005] Therefore, it is necessary to propose a corrosion-resistant fiberglass pipe with good high-temperature resistance and its preparation process. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a corrosion-resistant fiberglass pipe and its manufacturing process.

[0007] A manufacturing process for corrosion-resistant fiberglass pipe includes the following steps:

[0008] S1: Add boron phenolic resin, epoxy vinyl ester resin, high-temperature resistant additives, flux, modified montmorillonite, garnet powder, flame retardant and mica powder to a disperser, mix evenly to obtain a mixture.

[0009] S2: Ethylenediamine and anhydrous ethanol are thoroughly mixed, and then glass fiber and PBO fiber modified with silane coupling agent are added. After uniform dispersion, a mixed dispersion is obtained.

[0010] S3: Add the above mixture to the above mixed dispersion liquid, and vacuum seal and stir for 30-40 minutes. Then pour it into the preheated mold and rotate it at 400-500 r / min and 140-160℃ for 40-50 minutes. After demolding, trimming and grinding, the fiberglass pipe is obtained.

[0011] Furthermore, the preparation steps of modified montmorillonite are as follows:

[0012] A1: Add organomontmorillonite and tetrabutyl titanate to xylene at a mass ratio of (2-3):1:(3.3-3.5), and mix thoroughly to obtain a mixed suspension;

[0013] A2: Add urushiol to the above mixed suspension and heat and stir at 70-80℃ for 1-2 hours, then heat and stir at 110-120℃ for 2-3 hours, and finally heat and stir at 135-140℃ for 1-2 hours. After cooling, modified montmorillonite is obtained, wherein the mass ratio of urushiol to tetrabutyl titanate is (1.8-2):1.

[0014] Furthermore, the preparation steps of organomontmorillonite are as follows:

[0015] Montmorillonite was dispersed in deionized water at a solid-liquid ratio of 1g:(10-20)mL and ultrasonically treated for 1-2 hours to obtain a montmorillonite suspension. Subsequently, hexadecyltrimethylammonium bromide was dissolved in 80% ethanol solution at a solid-liquid ratio of 1g:(8-10)mL to prepare a hexadecyltrimethylammonium bromide solution, which was then added dropwise to the montmorillonite suspension. The solution was then heated and stirred at 75-85℃ for 4-5 hours, and then filtered, washed and vacuum dried to obtain organomontmorillonite, wherein the mass ratio of hexadecyltrimethylammonium bromide to montmorillonite was (1-2):1.

[0016] Furthermore, the preparation steps of the high-temperature resistant additive are as follows:

[0017] B1: Add ZrOCl2·8H2O to anhydrous ethanol, stir thoroughly to dissolve, then add acetylacetone and stir for 1-2 hours to obtain a mixed solution, wherein the molar ratio of ZrOCl2·8H2O to anhydrous ethanol is 1:(25-30), and the molar ratio of acetylacetone to ZrOCl2·8H2O is 1:1;

[0018] B2: Add diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate to the above mixed solution, and heat and stir at 70-80℃ for 2-3 hours. Then, rotary evaporate at 100℃ for 15-20 minutes to obtain a high-temperature resistant additive.

[0019] Furthermore, the molar ratio of diphenyldimethoxysilane to 3-(triethoxysilyl)propyl methacrylate is (1.8-2.2):1, and the molar ratio of diphenyldimethoxysilane to ZrOCl2·8H2O is (6.5-7):1.

[0020] Further, by weight, the raw material composition of the fiberglass pipe is as follows: 30-40 parts boron phenolic resin, 10-20 parts epoxy vinyl ester resin, 10-20 parts high-temperature resistant additives, 12-16 parts modified montmorillonite, 15-25 parts flux, 5-15 parts garnet powder, 2-3 parts flame retardant, 6-8 parts mica powder, 35-45 parts glass fiber, 1-3 parts PBO fiber, 20-30 parts ethylenediamine, and 15-25 parts anhydrous ethanol; wherein the flame retardant is any one of ammonium superphosphate and zinc borate, and the flux is any one of alumina, magnesium oxide, or aluminum hydroxide.

[0021] Furthermore, the main components of the garnet micro powder are: 36-40wt% SiO2, 20-24wt% Al2O3, 22-24wt% FeO, 8-13wt% MgO, 6-9wt% CaO, 4-6wt% Fe2O3, 0-0.5wt% TiO2 and 0-0.5wt% MnO.

[0022] Furthermore, a corrosion-resistant fiberglass pipe is prepared by the manufacturing process of a corrosion-resistant fiberglass pipe described in any of the above claims.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] 1. In this invention, zirconium oxychloride octahydrate is first dissolved in anhydrous ethanol, and then acetylacetone is added. The ketone group reacts with zirconium ions to form a stable six-coordinate complex, which inhibits hydrolysis. Then, diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate are added to react and prepare a high-temperature resistant additive containing Si-O-Zr bonds. After adding it to boron phenolic resin and making it into a fiberglass pipe, the high-temperature resistant additive can be ceramicized to form a Zr-Si-O glass phase covering the carbon layer surface. At the same time, a three-dimensional high-temperature resistant skeleton is formed through Si-O-Zr bond crosslinking, which can effectively inhibit the escape of resin thermal decomposition products, thereby improving the high-temperature resistance of the fiberglass pipe.

[0025] 2. In this invention, organomontmorillonite is first prepared using hexadecyltrimethylammonium bromide as an intercalating agent. Then, organomontmorillonite and tetrabutyl titanate are dispersed in xylene, allowing the titanium oxide bonds of tetrabutyl titanate to react with the hydroxyl groups on the surface of organomontmorillonite to form Ti-O-Si bonds. Then, urushiol is added to react, allowing the phenolic hydroxyl groups of urushiol to undergo an esterification reaction with tetrabutyl titanate, forming modified montmorillonite with a stable organic-inorganic hybrid structure. After being added to boron phenolic resin to make fiberglass pipes, the modified montmorillonite has a tortuous and complex path, which can form a maze effect, prolonging the penetration path of corrosive media, thereby effectively improving the acid and alkali corrosion resistance of fiberglass pipes.

[0026] 3. In this invention, when PBO fibers and garnet micro powder are used together to prepare fiberglass pipes, on the one hand, at high temperatures, PBO fibers maintain structural integrity, while garnet micro powder delays resin carbonization by absorbing heat and insulating heat, forming a double-layer thermal protection layer to further improve the high-temperature resistance of the fiberglass pipe. On the other hand, PBO fibers themselves have self-flame-retardant properties, and the carbonized layer generated at high temperatures, together with the barrier effect of garnet micro powder, forms a dense thermal barrier, thereby further improving the flame-retardant performance of the fiberglass pipe. Attached Figure Description

[0027] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0028] Figure 1 This is a TEM image of the modified montmorillonite prepared in Example 1 of the present invention. Detailed Implementation

[0029] The following describes in detail, with reference to the accompanying drawings and specific embodiments, a corrosion-resistant fiberglass pipe and its manufacturing process provided by the present invention.

[0030] Example 1

[0031] A manufacturing process for corrosion-resistant fiberglass pipe includes the following steps:

[0032] Preparation of organomontmorillonite:

[0033] Montmorillonite was dispersed in deionized water at a solid-liquid ratio of 1 g: 10 mL and ultrasonicated for 1 h to obtain a montmorillonite suspension. Subsequently, hexadecyltrimethylammonium bromide was dissolved in 80% ethanol solution at a solid-liquid ratio of 1 g: 8 mL to prepare a hexadecyltrimethylammonium bromide solution, which was then added dropwise to the montmorillonite suspension. The mixture was then heated and stirred at 75 °C for 4 h, and finally filtered, washed, and vacuum dried to obtain organomontmorillonite, wherein the mass ratio of hexadecyltrimethylammonium bromide to montmorillonite was 1:1.

[0034] Preparation of modified montmorillonite:

[0035] The above-mentioned organomontmorillonite and tetrabutyl titanate were added to xylene at a mass ratio of 2:1:3.3 and thoroughly mixed to obtain a mixed suspension. Then, urushiol was added to the mixed suspension, and the mixture was heated and stirred at 70°C for 1 hour, followed by heating and stirring at 110°C for 2 hours, and finally heating and stirring at 135°C for 1 hour. After cooling, the modified montmorillonite was obtained, and its TEM image is shown below. Figure 1 As shown, the mass ratio of urushiol to tetrabutyl titanate is 1.8:1;

[0036] Preparation of high-temperature resistant additives:

[0037] ZrOCl2·8H2O was added to anhydrous ethanol and stirred thoroughly to dissolve. Then, acetylacetone was added and the mixture was stirred for 1 hour to obtain a mixed solution. The molar ratio of ZrOCl2·8H2O to anhydrous ethanol was 1:25, and the molar ratio of acetylacetone to ZrOCl2·8H2O was 1:1. Then, diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate were added to the mixed solution, and the mixture was heated and stirred at 70°C for 2 hours. After rotary evaporation at 100°C for 15 minutes, a high-temperature resistant additive was obtained. The molar ratio of diphenyldimethoxysilane to 3-(triethoxysilyl)propyl methacrylate was 1.8:1, and the molar ratio of diphenyldimethoxysilane to ZrOCl2·8H2O was 6.5:1.

[0038] S1: Add 30 parts by weight of boron phenolic resin, 10 parts by weight of epoxy vinyl ester resin, 10 parts by weight of high temperature resistant additive, 15 parts by weight of alumina, 12 parts by weight of modified montmorillonite, 5 parts by weight of garnet micro powder, 2 parts by weight of superphosphate and 6 parts by weight of mica powder into a disperser, and mix evenly to obtain a mixture.

[0039] S2: 20 parts by mass of ethylenediamine and 15 parts by mass of anhydrous ethanol are thoroughly mixed, then 35 parts by mass of glass fiber modified with silane coupling agent KH-550 and 1 part by mass of PBO fiber modified with silane coupling agent KH-550 are added. After uniform dispersion, a mixed dispersion is obtained. The main components of garnet micro powder are: 36wt% SiO2, 20wt% Al2O3, 22wt% FeO, 8wt% MgO, 6wt% CaO, and 4wt% Fe2O3.

[0040] S3: Add the above mixture to the above mixed dispersion liquid, and vacuum seal and stir for 30 minutes. Then pour it into the preheated mold and rotate it at 400 r / min and 140℃ for 40 minutes. After demolding, trimming and grinding, the fiberglass pipe is obtained.

[0041] Example 2

[0042] A manufacturing process for corrosion-resistant fiberglass pipe includes the following steps:

[0043] Preparation of organomontmorillonite:

[0044] Montmorillonite was dispersed in deionized water at a solid-liquid ratio of 1 g: 15 mL and ultrasonicated for 1.5 h to obtain a montmorillonite suspension. Subsequently, hexadecyltrimethylammonium bromide was dissolved in 80% ethanol solution at a solid-liquid ratio of 1 g: 9 mL to prepare a hexadecyltrimethylammonium bromide solution, which was then added dropwise to the montmorillonite suspension. The mixture was then heated and stirred at 80 °C for 4.5 h, and finally filtered, washed, and vacuum dried to obtain organomontmorillonite, wherein the mass ratio of hexadecyltrimethylammonium bromide to montmorillonite was 1.5:1.

[0045] Preparation of modified montmorillonite:

[0046] Organomontmorillonite and tetrabutyl titanate were added to xylene at a mass ratio of 2.5:1:3.4 and stirred thoroughly to obtain a mixed suspension. Then, urushiol was added to the mixed suspension and the mixture was heated and stirred at 75°C for 1.5 h, followed by heating and stirring at 115°C for 2.5 h, and finally heating and stirring at 138°C for 1.5 h. After cooling, modified montmorillonite was obtained, wherein the mass ratio of urushiol to tetrabutyl titanate was 1.9:1.

[0047] Preparation of high-temperature resistant additives:

[0048] ZrOCl2·8H2O was added to anhydrous ethanol and stirred thoroughly to dissolve. Then, acetylacetone was added and the mixture was stirred for 1.5 h to obtain a mixed solution. The molar ratio of ZrOCl2·8H2O to anhydrous ethanol was 1:28, and the molar ratio of acetylacetone to ZrOCl2·8H2O was 1:1. Then, diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate were added to the mixed solution and the mixture was heated and stirred at 75 °C for 2.5 h. After rotary evaporation at 100 °C for 18 min, a high-temperature resistant additive was obtained. The molar ratio of diphenyldimethoxysilane to 3-(triethoxysilyl)propyl methacrylate was 2:1, and the molar ratio of diphenyldimethoxysilane to ZrOCl2·8H2O was 6.8:1.

[0049] S1: Add 35 parts by weight of boron phenolic resin, 15 parts by weight of epoxy vinyl ester resin, 15 parts by weight of high temperature resistant additive, 20 parts by weight of magnesium oxide, 14 parts by weight of modified montmorillonite, 10 parts by weight of garnet powder, 2.5 parts by weight of superphosphate and 7 parts by weight of mica powder to a disperser, mix evenly to obtain a mixture.

[0050] S2: 25 parts by mass of ethylenediamine and 20 parts by mass of anhydrous ethanol are thoroughly mixed, then 40 parts by mass of glass fiber modified with silane coupling agent KH-550 and 2 parts by mass of PBO fiber modified with silane coupling agent KH-550 are added. After uniform dispersion, a mixed dispersion is obtained. The main components of the garnet micro powder are: 38.3wt% SiO2, 23.7wt% Al2O3, 22.8wt% FeO, 10.5wt% MgO, 7.4wt% CaO, 4.2wt% Fe2O3, 0.3wt% TiO2 and 0.1wt% MnO.

[0051] S3: Add the above mixture to the above mixed dispersion liquid, and vacuum seal and stir for 35 minutes. Then pour it into the preheated mold and rotate it at 450 r / min and 150℃ for 45 minutes. After demolding, trimming and grinding, the fiberglass pipe is obtained.

[0052] Example 3

[0053] A manufacturing process for corrosion-resistant fiberglass pipe includes the following steps:

[0054] Preparation of organomontmorillonite:

[0055] Montmorillonite was dispersed in deionized water at a solid-liquid ratio of 1 g: 20 mL and ultrasonically treated for 2 h to obtain a montmorillonite suspension. Subsequently, hexadecyltrimethylammonium bromide was dissolved in 80% ethanol solution at a solid-liquid ratio of 1 g: 10 mL to prepare a hexadecyltrimethylammonium bromide solution, which was then added dropwise to the montmorillonite suspension. The mixture was then heated and stirred at 85 °C for 5 h, and finally filtered, washed, and vacuum dried to obtain organomontmorillonite, wherein the mass ratio of hexadecyltrimethylammonium bromide to montmorillonite was 2:1.

[0056] Preparation of modified montmorillonite:

[0057] Organomontmorillonite and tetrabutyl titanate were added to xylene at a mass ratio of 3:1:3.5 and stirred thoroughly to obtain a mixed suspension. Then, urushiol was added to the mixed suspension and heated and stirred at 80°C for 2 hours, followed by heating and stirring at 120°C for 3 hours, and finally heating and stirring at 140°C for 2 hours. After cooling, modified montmorillonite was obtained, wherein the mass ratio of urushiol to tetrabutyl titanate was 2:1.

[0058] Preparation of high-temperature resistant additives:

[0059] ZrOCl2·8H2O was added to anhydrous ethanol and stirred thoroughly to dissolve. Then, acetylacetone was added and the mixture was stirred for 2 hours to obtain a mixed solution. The molar ratio of ZrOCl2·8H2O to anhydrous ethanol was 1:30, and the molar ratio of acetylacetone to ZrOCl2·8H2O was 1:1. Then, diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate were added to the mixed solution, and the mixture was heated and stirred at 80°C for 3 hours. After rotary evaporation at 100°C for 20 minutes, a high-temperature resistant additive was obtained. The molar ratio of diphenyldimethoxysilane to 3-(triethoxysilyl)propyl methacrylate was 2.2:1, and the molar ratio of diphenyldimethoxysilane to ZrOCl2·8H2O was 7:1.

[0060] S1: Add 40 parts by weight of boron phenolic resin, 20 parts by weight of epoxy vinyl ester resin, 20 parts by weight of high temperature resistant additive, 25 parts by weight of aluminum hydroxide, 16 parts by weight of modified montmorillonite, 15 parts by weight of garnet micro powder, 3 parts by weight of zinc borate and 8 parts by weight of mica powder to a disperser, and mix evenly to obtain a mixture.

[0061] S2: 30 parts by mass of ethylenediamine and 25 parts by mass of anhydrous ethanol are thoroughly mixed, then 45 parts by mass of glass fiber modified with silane coupling agent KH-550 and 3 parts by mass of PBO fiber modified with silane coupling agent KH-550 are added. After uniform dispersion, a mixed dispersion is obtained. The main components of the garnet micro powder are: 40wt% SiO2, 24wt% Al2O3, 24wt% FeO, 13wt% MgO, 9wt% CaO, 6wt% Fe2O3, 0.5wt% TiO2 and 0.5wt% MnO.

[0062] S3: Add the above mixture to the above mixed dispersion liquid, and vacuum seal and stir for 40 minutes. Then pour it into the preheated mold and rotate it at 500 r / min and 160℃ for 50 minutes. After demolding, trimming and grinding, the fiberglass pipe is obtained.

[0063] Comparative Example 1

[0064] The difference between Comparative Example 1 and Example 1 is that the high-temperature resistant additive in step S1 is removed.

[0065] Comparative Example 2

[0066] The difference between Comparative Example 2 and Example 1 is that the modified montmorillonite in step S1 is removed.

[0067] Comparative Example 3

[0068] The difference between Comparative Example 3 and Example 1 is that the garnet micro powder in step S1 is replaced with an equal amount of PBO fiber.

[0069] Comparative Example 4

[0070] The difference between Comparative Example 4 and Example 1 is that the PBO fibers in step S2 are replaced with an equal amount of garnet powder.

[0071] Test case

[0072] Test 1: The thermal stability of the fiberglass pipes prepared in Examples 1-3 and Comparative Examples 1, 3 and 4 was analyzed using a comprehensive thermal analyzer. The thermal weight loss rate of the fiberglass pipes from room temperature to 400℃ was measured. Each group was repeated three times and the average value was taken. The results are shown in Table 1.

[0073] Table 1: Results of Thermal Weight Loss Test for Fiberglass Pipes

[0074]

[0075] As shown in Table 1, the thermal weight loss rate of the fiberglass pipe prepared in Comparative Example 1 without the addition of high-temperature resistant additives was significantly higher than that in Example 1. This indicates that by first dissolving zirconium oxychloride octahydrate in anhydrous ethanol, then adding acetylacetone, and utilizing the chelation reaction between the ketone group and zirconium ions to form a stable six-coordinate complex to inhibit hydrolysis, and then adding diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate to react, a high-temperature resistant additive containing Si-O-Zr bonds is prepared. After adding this additive to boron phenolic resin and preparing fiberglass pipes, the high-temperature resistance of the fiberglass pipes can be effectively improved.

[0076] Furthermore, in Comparative Examples 3 and 4, when only one of PBO fiber or garnet powder was added, the thermal weight loss rate of the resulting fiberglass pipes was higher than that in Example 1. This shows that the combined use of PBO fiber and garnet powder can improve the high-temperature resistance of fiberglass pipes.

[0077] Test 2: The fiberglass pipe samples prepared in Examples 1-3 and Comparative Example 2 were placed in 20% sulfuric acid and 30% sodium hydroxide solutions, respectively, and soaked for 30 days. The mass loss was then tested. The experiment was repeated three times for each group, and the average value was taken. The results are shown in Table 2.

[0078] Table 2: Results of acid and alkali corrosion resistance tests

[0079]

[0080] As shown in Table 2, the acid and alkali immersion mass loss rate of the fiberglass pipes prepared in Comparative Example 2 without the addition of modified montmorillonite was higher than that in Example 1. This shows that by first preparing organomontmorillonite using hexadecyltrimethylammonium bromide as an intercalating agent, and then dispersing organomontmorillonite and tetrabutyl titanate in xylene, the titanium oxide bond of tetrabutyl titanate reacts with the hydroxyl group on the surface of organomontmorillonite to form Ti-O-Si bonds. Then, urushiol is added to react, and the phenolic hydroxyl group of urushiol reacts with tetrabutyl titanate to form modified montmorillonite with a stable organic-inorganic hybrid structure. After adding it to boron phenolic resin to make fiberglass pipes, the acid and alkali corrosion resistance of fiberglass pipes can be effectively improved.

[0081] Test 3: The limiting oxygen index of the fiberglass pipes prepared in Examples 1-3 and Comparative Examples 3-4 was tested. Each group was tested three times and the average value was taken. The results are shown in Table 3.

[0082] Table 3: Limiting Oxygen Index of Fiberglass Pipes

[0083]

[0084] As shown in Table 3, when only one of PBO fiber or garnet powder was added in Comparative Examples 3 and 4, the limiting oxygen index of the resulting fiberglass pipes was lower than that of Example 1. This shows that the combined use of PBO fiber and garnet powder can synergistically improve the flame retardant properties of fiberglass pipes.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A manufacturing process for corrosion-resistant fiberglass pipes, characterized in that, Includes the following steps: S1: Add boron phenolic resin, epoxy vinyl ester resin, high-temperature resistant additives, flux, modified montmorillonite, garnet powder, flame retardant and mica powder to a disperser, mix evenly to obtain a mixture. S2: Ethylenediamine and anhydrous ethanol are thoroughly mixed, and then glass fiber and PBO fiber modified with silane coupling agent are added. After uniform dispersion, a mixed dispersion is obtained. S3: Add the above mixture to the above mixed dispersion liquid, and vacuum seal and stir for 30-40 minutes. Then pour it into the preheated mold and rotate it at 400-500 r / min and 140-160℃ for 40-50 minutes. After demolding, trimming and grinding, fiberglass pipe is obtained. The preparation steps of modified montmorillonite are as follows: A1: Add organomontmorillonite and tetrabutyl titanate to xylene at a mass ratio of (2-3):1:(3.3-3.5), and mix thoroughly to obtain a mixed suspension; A2: Add urushiol to the above mixed suspension and heat and stir at 70-80℃ for 1-2 hours, then heat and stir at 110-120℃ for 2-3 hours, and finally heat and stir at 135-140℃ for 1-2 hours. After cooling, modified montmorillonite is obtained, wherein the mass ratio of urushiol to tetrabutyl titanate is (1.8-2):

1. The preparation steps for the high-temperature resistant additive are as follows: B1: Add ZrOCl2·8H2O to anhydrous ethanol, stir thoroughly to dissolve, then add acetylacetone and stir for 1-2 hours to obtain a mixed solution, wherein the molar ratio of ZrOCl2·8H2O to anhydrous ethanol is 1:(25-30), and the molar ratio of acetylacetone to ZrOCl2·8H2O is 1:1; B2: Add diphenyldimethoxysilane and 3-(triethoxysilyl)propyl methacrylate to the above mixed solution, and heat and stir at 70-80℃ for 2-3 hours. Then, rotary evaporate at 100℃ for 15-20 minutes to obtain a high-temperature resistant additive.

2. The manufacturing process of a corrosion-resistant fiberglass pipe according to claim 1, characterized in that, The preparation steps of organomontmorillonite are as follows: Montmorillonite was dispersed in deionized water at a solid-liquid ratio of 1g:(10-20)mL and ultrasonically treated for 1-2 hours to obtain a montmorillonite suspension. Subsequently, hexadecyltrimethylammonium bromide was dissolved in 80% ethanol solution at a solid-liquid ratio of 1g:(8-10)mL to prepare a hexadecyltrimethylammonium bromide solution, which was then added dropwise to the montmorillonite suspension. The solution was then heated and stirred at 75-85℃ for 4-5 hours, and then filtered, washed and vacuum dried to obtain organomontmorillonite, wherein the mass ratio of hexadecyltrimethylammonium bromide to montmorillonite was (1-2):

1.

3. The manufacturing process of a corrosion-resistant fiberglass pipe according to claim 1, characterized in that, The molar ratio of diphenyldimethoxysilane to 3-(triethoxysilyl)propyl methacrylate is (1.8-2.2):1, and the molar ratio of diphenyldimethoxysilane to ZrOCl2·8H2O is (6.5-7):

1.

4. The manufacturing process of a corrosion-resistant fiberglass pipe according to claim 1, characterized in that, By weight, the raw material composition of FRP pipe is as follows: 30-40 parts boron phenolic resin, 10-20 parts epoxy vinyl ester resin, 10-20 parts high-temperature resistant additives, 12-16 parts modified montmorillonite, 15-25 parts flux, 5-15 parts garnet powder, 2-3 parts flame retardant, 6-8 parts mica powder, 35-45 parts glass fiber, 1-3 parts PBO fiber, 20-30 parts ethylenediamine and 15-25 parts anhydrous ethanol; wherein, the flame retardant is any one of ammonium superphosphate and zinc borate, and the flux is any one of alumina, magnesium oxide or aluminum hydroxide.

5. The manufacturing process of a corrosion-resistant fiberglass pipe according to claim 4, characterized in that, The main components of garnet micro powder are: 36-40wt% SiO2, 20-24wt% Al2O3, 22-24wt% FeO, 8-13wt% MgO, 6-9wt% CaO, 4-6wt% Fe2O3, 0-0.5wt% TiO2 and 0-0.5wt% MnO.

6. A corrosion-resistant fiberglass pipe, characterized in that, It is prepared by the manufacturing process of a corrosion-resistant fiberglass pipe as described in any one of claims 1-5.

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