Corrosion-resistant Krah pipe and preparation method thereof

Abstract

The invention relates to a corrosion-resistant Krah pipe and a preparation method thereof, and belongs to the technical field of high polymer materials. The corrosion-resistant Krah pipe comprises the following components in parts by weight: 40-60 parts of HDPE resin, 5-15 parts of PP resin, 10-20 parts of adhesive resin, 1-3 parts of a defoaming agent, 1-3 parts of a lubricant, 1-2 parts of a dispersing agent, 1-3 parts of a stabilizer and 4-6 parts of a modified heat-resistant agent, the compound improves the chemical corrosion resistance of the Krah pipe, the long carbon chain structure and conjugated double bonds of the compound endow the Krah pipe with good flexibility and reaction activity, the molecular structure or crystallinity of high-density polyethylene is improved, a cross-linked structure is formed with an HDPE molecular chain, the mechanical property of the material is enhanced, and the movement of the molecular chain is limited; benzene rings and carbonyl groups in the hydroxybenzophenone form a conjugated system, so that ultraviolet rays are absorbed, and the service life is prolonged; the corrosion-resistant Krah pipe prepared by the invention not only has good corrosion resistance and heat resistance, but also has excellent ultraviolet-resistant effect and tensile strength.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a corrosion-resistant carat tube and a preparation method thereof. Background Art

[0002] Carat tube is a high-density polyethylene wrapped structural wall tube formed by hot winding. It uses high-density polyethylene resin as raw material and is a special-shaped structural wall pipe made through a hot winding process. It is suitable for laying in narrow construction sites, complex underground pipelines and acidic and alkaline soil environments. It has the characteristics of low resistance, long service life, light weight, easy construction, corrosion resistance, and good airtightness. It is widely used in municipal drainage, industrial wastewater treatment and other fields.

[0003] However, the main raw material of carat pipe, high-density polyethylene, has poor heat resistance and is easily softened and deformed in high temperature environments, increasing brittleness and even rupture, resulting in a decrease in the pressure-bearing capacity of the pipeline. At the same time, HDPE material is sensitive to ultraviolet rays, and long-term exposure to sunlight will accelerate aging, affecting its service life. In addition, although corrosion-resistant carat pipe has certain corrosion resistance, with the increase in actual application needs, its own corrosion resistance can no longer meet the demand. Therefore, the research and development of excellent corrosion-resistant carat pipe has important practical significance and application value. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a corrosion-resistant carat tube and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A corrosion-resistant carat pipe comprises the following raw materials in parts by weight: 40-60 parts of HDPE resin, 5-15 parts of PP resin, 10-20 parts of adhesive resin, 1-3 parts of defoaming agent, 1-3 parts of lubricant, 1-2 parts of dispersant, 1-3 parts of stabilizer, and 4-6 parts of modified heat-resistant agent; The defoaming agent is fatty acid glyceride; The lubricant is magnesium sulfate; The dispersant is stearamide; The stabilizer is potassium stearate.

[0006] The modified heat-resistant agent is prepared by the following method: Step A1: Tung oil, methanol, and potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 hours, and then transferred to a separatory funnel for separation. The mixture was then washed until neutral, dried, filtered, and distilled under reduced pressure to obtain a compound. Furthermore, the usage ratio of tung oil, methanol, and potassium hydroxide is 20-40 g: 6-12 mL: 0.15-0.28 g; Step A2: The compound, L-arginine, tetrahydrofuran, and deionized water were mixed uniformly, and stirred at 60° C. for 12 hours. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Furthermore, the ratio of the compound, L-arginine, tetrahydrofuran, and deionized water is 0.02-0.04 mol: 0.01-0.02 mol: 10-50 mL: 10-50 mL; Step A3: Allyltrimethoxysilane and ethanol-water mixed solution were mixed at 35°C and stirred for 10 minutes. Then, the intermediate and 4-dimethylaminopyridine were added, and the temperature was raised to 60°C for reaction for 5 hours. After the temperature was lowered to room temperature, the product was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. Furthermore, the usage ratio of allyltrimethoxysilane, ethanol-water mixed solution, intermediate, and 4-dimethylaminopyridine is 0.03-0.06 mol:120 mL:0.01-0.02 mol:0.25-0.50 g; the volume ratio of ethanol to deionized water in the ethanol-water mixed solution is 4:1; Step A4: Mix oxybenzone, glycidyl methacrylate, and chloroform, add Amberlyst 15 ion exchange resin, place in an ultrasonic water bath, heat to 50°C, and stir to react for 3 hours. After the reaction is complete, filter, rotary evaporate, and dry to obtain pre-product 2; Furthermore, the usage ratio of oxybenzone, glycidyl methacrylate, chloroform, and Amberlyst 15 ion exchange resin is 0.01-0.03 mol: 0.01-0.03 mol: 5-7 mL: 0.5 g; Step A5: Pre-product 1 and pre-product 2 were mixed evenly, and then toluene, anhydrous ethanol and azobisisobutyronitrile were added and mixed, the mixture was heated to 55° C., stirred and reacted for 10 minutes, kept warm for 2 hours, filtered, washed, and vacuum dried for 24 hours to obtain a modified heat-resistant agent; Furthermore, the usage ratio of the preproduct, preproduct 2, toluene, anhydrous ethanol, and azobisisobutyronitrile is 0.01-0.03 mol: 0.01-0.03 mol: 20-30 mL: 20-30 mL: 0.005 g.

[0007] A method for preparing a corrosion-resistant carat tube specifically comprises the following steps: S1. Mix HDPE resin, PP resin, adhesive resin and defoamer, heat to 200°C, stir for 15 minutes, and rotate at 300-500 r / min to obtain a mixed material; S2. Mix the mixed material, lubricant, dispersant, stabilizer and modified heat-resistant agent, stir for 20 minutes, rotate at a speed of 300-500r / min, and then extrude through an extruder at an extrusion temperature of 180-200℃, cool at -2-0℃ and shape to obtain a corrosion-resistant carat tube.

[0008] Beneficial effects of the present invention: The corrosion-resistant carat tube prepared by the present invention not only has good corrosion resistance and heat resistance, but also has excellent ultraviolet resistance and tensile strength, thereby effectively extending the service life of the material.

[0009] The modified heat-resistant agent prepared by the present invention comprises the following steps: firstly, tung oil is reacted with methanol under alkaline conditions to synthesize a compound; then, an ester group of the compound is reacted with an amino group of L-arginine to generate an intermediate; secondly, silanol groups after hydrolysis of allyltrimethoxysilane are reacted with a carboxyl group of the intermediate to generate a pre-product 1; then, a hydroxyl group of oxybenzone is reacted with an epoxy group of glycidyl methacrylate to generate a pre-product 2; and finally, a carbon-carbon double bond of the pre-product 1 and a carbon-carbon double bond of the pre-product 2 are copolymerized to obtain the modified heat-resistant agent. Among the modified heat-resistant agents, tung oil itself has good acid resistance, alkali resistance, and corrosion resistance. The prepared compound can introduce these properties into the material, thereby improving the chemical corrosion resistance of the carat tube. At the same time, tung oil, as a renewable plant resource, is biodegradable. Its introduction into the modified heat-resistant agent can reduce the non-degradability of the material, reduce pollution to the environment, and comply with the concept of environmental protection. Secondly, the long carbon chain structure and conjugated double bonds of the compound give it good flexibility and reactivity, which can improve the molecular structure or crystallinity of high-density polyethylene, help improve the heat resistance of the carat tube, and reduce thermal aging caused by high temperature. In addition, the compound can react with H The DPE molecular chain forms a cross-linked structure, which enhances the mechanical properties of the material and limits the movement of the molecular chain, thereby improving the stability and thermal deformation temperature of the material. In addition, the benzene ring and methoxy structure of oxybenzone can effectively absorb ultraviolet rays and convert them into harmless heat energy, protecting the material from damage by ultraviolet rays. At the same time, a conjugated system can be formed between the benzene ring and the carbonyl group in the oxybenzone structure. This structure enables it to absorb ultraviolet rays. When exposed to ultraviolet rays, the molecules undergo thermal vibration, causing the electrons to be excited and jump to high energy levels. Energy is then released in the form of weak long-wave emission, resisting the harm of high-energy ultraviolet rays and effectively extending the service life of the carat tube. DETAILED DESCRIPTION

[0010] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0011] Example 1: A method for preparing a corrosion-resistant carat tube, comprising the following steps: S1. Weigh the raw materials by weight: 40 parts of HDPE resin, 8 parts of PP resin, 10 parts of adhesive resin, 1 part of defoamer, 1 part of lubricant, 1 part of dispersant, 1 part of stabilizer, and 4 parts of modified heat-resistant agent (prepared in this example); mix the HDPE resin, PP resin, adhesive resin, and fatty acid glyceride, heat to 200° C., and stir for 15 minutes at a speed of 300 r / min to obtain a mixed material; S2, the mixture, magnesium sulfate, stearamide, potassium stearate and modified heat-resistant agent were mixed, stirred for 20min, the speed was 300r / min, and then passed through an extruder, extruded, the extrusion temperature was 180°C, and cooled at -2°C to form a corrosion-resistant carat tube; The modified heat-resistant agent is prepared by the following method: Step A1: 20 g of tung oil, 6 mL of methanol, and 0.15 g of potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 h, transferred to a separatory funnel for separation, washed until neutral, dried, filtered, and distilled under reduced pressure to obtain the compound; Step A2: 0.02 mol of the compound, 0.01 mol of L-arginine, 10 mL of tetrahydrofuran, and 10 mL of deionized water were mixed uniformly, and the mixture was stirred at 60°C for 12 h. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Step A3: 0.03 mol of allyltrimethoxysilane and 120 mL of an ethanol-water mixed solution were mixed at 35°C and stirred for 10 min. 0.01 mol of the intermediate and 0.25 g of 4-dimethylaminopyridine were then added. The mixture was heated to 60°C and reacted for 5 h. After cooling to room temperature, the mixture was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. The volume ratio of ethanol to deionized water in the ethanol-water mixed solution was 4:1. Step A4: 0.01 mol of oxybenzone, 0.01 mol of glycidyl methacrylate, and 5 mL of chloroform were mixed evenly, and 0.5 g of Amberlyst 15 ion exchange resin was added. The mixture was placed in an ultrasonic water bath, heated to 50°C, and stirred for 3 h. After the reaction, the mixture was filtered, rotary evaporated, and dried to obtain pre-product 2. Step A5: Mix 0.01 mol of pre-product 1 and 0.01 mol of pre-product 2 evenly, then add 20 mL of toluene, 20 mL of anhydrous ethanol and 0.005 g of azobisisobutyronitrile, heat to 55 ° C, stir to react for 10 minutes, keep warm for 2 hours, filter, wash, and vacuum dry for 24 hours to obtain a modified heat-resistant agent.

[0012] Example 2: A method for preparing a corrosion-resistant carat tube, comprising the following steps: S1. Weigh the raw materials by weight: 47 parts of HDPE resin, 10 parts of PP resin, 13 parts of adhesive resin, 1.7 parts of defoamer, 1.7 parts of lubricant, 1.3 parts of dispersant, 1.7 parts of stabilizer, and 4.7 parts of modified heat-resistant agent (prepared in this example); mix the HDPE resin, PP resin, adhesive resin, and fatty acid glyceride, heat to 200° C., and stir for 15 minutes at a speed of 370 r / min to obtain a mixed material; S2, the mixture, magnesium sulfate, stearamide, potassium stearate and modified heat-resistant agent are mixed, stirred for 20min, the speed is 370r / min, and then passed through an extruder, extruded, the extrusion temperature is 187°C, and cooled and shaped at -1.3°C to obtain a corrosion-resistant carat tube; The modified heat-resistant agent is prepared by the following method: Step A1: 27 g of tung oil, 8 mL of methanol, and 0.193 g of potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 h, transferred to a separatory funnel for separation, washed until neutral, dried, filtered, and distilled under reduced pressure to obtain the compound; Step A2: 0.027 mol of the compound, 0.013 mol of L-arginine, 23 mL of tetrahydrofuran, and 23 mL of deionized water were mixed uniformly, and the mixture was stirred at 60°C for 12 h. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Step A3: 0.04 mol of allyltrimethoxysilane and 120 mL of an ethanol-water mixed solution were mixed at 35°C and stirred for 10 min. 0.013 mol of the intermediate and 0.333 g of 4-dimethylaminopyridine were then added. The mixture was heated to 60°C and reacted for 5 h. After cooling to room temperature, the mixture was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. The volume ratio of ethanol to deionized water in the ethanol-water mixed solution was 4:1. Step A4: 0.017 mol of oxybenzone, 0.017 mol of glycidyl methacrylate, and 5.3 mL of chloroform were mixed evenly, and 0.5 g of Amberlyst 15 ion exchange resin was added. The mixture was placed in an ultrasonic water bath, heated to 50° C., and stirred for 3 h. After the reaction, the mixture was filtered, rotary evaporated, and dried to obtain pre-product 2. Step A5: Mix 0.017 mol of pre-product 1 and 0.017 mol of pre-product 2 evenly, then add 23 mL of toluene, 23 mL of anhydrous ethanol and 0.005 g of azobisisobutyronitrile, heat to 55 ° C, stir to react for 10 minutes, keep warm for 2 hours, filter, wash, and vacuum dry for 24 hours to obtain a modified heat-resistant agent.

[0013] Example 3: A method for preparing a corrosion-resistant carat tube, comprising the following steps: S1. Weigh the raw materials by weight: 54 parts of HDPE resin, 11 parts of PP resin, 16 parts of adhesive resin, 2.4 parts of defoamer, 2.4 parts of lubricant, 1.6 parts of dispersant, 2.4 parts of stabilizer, and 5.4 parts of modified heat-resistant agent (prepared in this example); mix the HDPE resin, PP resin, adhesive resin, and fatty acid glyceride, heat to 200° C., and stir for 15 minutes at a speed of 440 r / min to obtain a mixed material; S2, the mixture, magnesium sulfate, stearamide, potassium stearate and modified heat-resistant agent are mixed, stirred for 20min, the speed is 440r / min, and then passed through an extruder, extruded, the extrusion temperature is 194°C, -0.6°C cooling and shaping, to obtain a corrosion-resistant carat tube; The modified heat-resistant agent is prepared by the following method: Step A1: 34 g of tung oil, 10 mL of methanol, and 0.236 g of potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 h, transferred to a separatory funnel for separation, washed until neutral, dried, filtered, and distilled under reduced pressure to obtain the compound; Step A2: 0.034 mol of the compound, 0.016 mol of L-arginine, 36 mL of tetrahydrofuran, and 36 mL of deionized water were mixed uniformly, and the mixture was stirred at 60°C for 12 h. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Step A3: 0.05 mol of allyltrimethoxysilane and 120 mL of an ethanol-water mixed solution were mixed at 35°C and stirred for 10 min. 0.016 mol of the intermediate and 0.416 g of 4-dimethylaminopyridine were then added. The mixture was heated to 60°C and reacted for 5 h. After cooling to room temperature, the mixture was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. The volume ratio of ethanol to deionized water in the ethanol-water mixed solution was 4:1. Step A4: 0.024 mol of oxybenzone, 0.024 mol of glycidyl methacrylate, and 5.6 mL of chloroform were mixed evenly, and 0.5 g of Amberlyst 15 ion exchange resin was added. The mixture was placed in an ultrasonic water bath, heated to 50° C., and stirred for 3 h. After the reaction, the mixture was filtered, rotary evaporated, and dried to obtain pre-product 2. Step A5: Mix 0.024 mol of pre-product 1 and 0.024 mol of pre-product 2 evenly, then add 26 mL of toluene, 26 mL of anhydrous ethanol and 0.005 g of azobisisobutyronitrile, heat to 55 ° C, stir to react for 10 minutes, keep warm for 2 hours, filter, wash, and vacuum dry for 24 hours to obtain a modified heat-resistant agent.

[0014] Example 4: A method for preparing a corrosion-resistant carat tube, comprising the following steps: S1. Weigh the raw materials by weight: 60 parts of HDPE resin, 15 parts of PP resin, 20 parts of adhesive resin, 3 parts of defoamer, 3 parts of lubricant, 2 parts of dispersant, 3 parts of stabilizer, and 6 parts of modified heat-resistant agent (prepared in this example); mix the HDPE resin, PP resin, adhesive resin, and fatty acid glyceride, heat to 200° C., and stir for 15 minutes at a speed of 500 r / min to obtain a mixed material; S2, the mixture, magnesium sulfate, stearamide, potassium stearate and modified heat-resistant agent are mixed, stirred for 20min, the speed is 500r / min, and then passed through an extruder, extruded, the extrusion temperature is 200°C, and cooled and shaped at 0°C to obtain a corrosion-resistant carat tube; The modified heat-resistant agent is prepared by the following method: Step A1: 40 g of tung oil, 12 mL of methanol, and 0.28 g of potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 h, transferred to a separatory funnel for separation, washed until neutral, dried, filtered, and distilled under reduced pressure to obtain the compound; Step A2: 0.04 mol of the compound, 0.02 mol of L-arginine, 50 mL of tetrahydrofuran, and 50 mL of deionized water were mixed uniformly, and the mixture was stirred at 60°C for 12 h. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Step A3: 0.06 mol of allyltrimethoxysilane and 120 mL of an ethanol-water mixed solution were mixed at 35°C and stirred for 10 min. 0.02 mol of the intermediate and 0.50 g of 4-dimethylaminopyridine were then added. The mixture was heated to 60°C and reacted for 5 h. After cooling to room temperature, the mixture was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. The volume ratio of ethanol to deionized water in the ethanol-water mixed solution was 4:1. Step A4: 0.03 mol of oxybenzone, 0.03 mol of glycidyl methacrylate, and 7 mL of chloroform were mixed evenly, and 0.5 g of Amberlyst 15 ion exchange resin was added. The mixture was placed in an ultrasonic water bath, heated to 50° C., and stirred for 3 h. After the reaction, the mixture was filtered, rotary evaporated, and dried to obtain pre-product 2. Step A5: Mix 0.03 mol of pre-product 1 and 0.03 mol of pre-product 2 evenly, then add 30 mL of toluene, 30 mL of anhydrous ethanol and 0.005 g of azobisisobutyronitrile, heat to 55 ° C, stir to react for 10 minutes, keep warm for 2 hours, filter, wash, and vacuum dry for 24 hours to obtain a modified heat-resistant agent.

[0015] Comparative Example: This comparative example is a corrosion-resistant carat tube. The difference from Example 3 is that the modified heat-resistant agent prepared in Example 3 is used with an equal amount of 2,6-di-tert-butyl-p-cresol, and the rest are the same.

[0016] Performance test: The corrosion-resistant carat tubes prepared in Examples 1-3 and the comparative example were cut into standard test sizes and the tensile strength was tested according to the standard GB / T1040-1992; the standard test sizes were placed in a UV aging box at 60°C and 0.86w / cm 2 , UV light exposure for 1000h, test the yellow index change difference, the larger the difference, the worse the anti-aging performance, and conduct chemical corrosion resistance time test; according to the impact test method of GB / T1843-2008 plastics, test the impact performance; the test results are shown in Table 1 below: Table 1

[0017] From the test data in Table 1, it can be seen that the corrosion-resistant carat tube prepared by the present invention not only has good corrosion resistance and heat resistance, but also has excellent UV resistance and tensile strength, thereby extending the service life of the material.

[0018] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a corrosion-resistant carat tube, characterized in that: The following steps are involved: S1. Weigh the raw materials by weight: 40-60 parts of HDPE resin, 5-15 parts of PP resin, 10-20 parts of adhesive resin, 1-3 parts of defoamer, 1-3 parts of lubricant, 1-2 parts of dispersant, 1-3 parts of stabilizer, and 4-6 parts of modified heat-resistant agent; mix the HDPE resin, PP resin, adhesive resin, and defoamer, heat to 200° C., and stir for 15 minutes at a speed of 300-500 r / min to obtain a mixed material; S2, the mixture, lubricant, dispersant, stabilizer and modified heat-resistant agent are mixed, stirred for 20min, the rotation speed is 300-500r / min, and then extruded through an extruder at an extrusion temperature of 180-200°C, and cooled to -2-0°C to prepare a corrosion-resistant carat tube; The modified heat-resistant agent is prepared by the following method: Step A1: Tung oil, methanol, and potassium hydroxide were mixed uniformly, reacted at 60°C for 1.5 hours, and then transferred to a separatory funnel for separation. The mixture was then washed until neutral, dried, filtered, and distilled under reduced pressure to obtain a compound. Step A2: The compound, L-arginine, tetrahydrofuran, and deionized water were mixed uniformly, and stirred at 60° C. for 12 hours. After the reaction, the mixture was filtered, distilled under reduced pressure, and dried in vacuo to obtain an intermediate. Step A3: Allyltrimethoxysilane and ethanol-water mixed solution were mixed at 35°C and stirred for 10 minutes. Then, the intermediate and 4-dimethylaminopyridine were added, and the temperature was raised to 60°C for reaction for 5 hours. After the temperature was lowered to room temperature, the product was washed, rotary evaporated, and dried at 60°C to obtain pre-product 1. Step A4: Mix oxybenzone, glycidyl methacrylate, and chloroform, add Amberlyst 15 ion exchange resin, place in an ultrasonic water bath, heat to 50°C, and stir to react for 3 hours. After the reaction is complete, filter, rotary evaporate, and dry to obtain pre-product 2; Step A5: Mix pre-product 1 and pre-product 2 evenly, then add toluene, anhydrous ethanol and azobisisobutyronitrile, heat to 55°C, stir to react for 10 minutes, keep warm for 2 hours, filter, wash, and vacuum dry for 24 hours to obtain a modified heat-resistant agent.

2. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: In step A1, the usage ratio of tung oil, methanol, and potassium hydroxide is 20-40 g: 6-12 mL: 0.15-0.28 g.

3. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: In step A2, the usage ratio of the compound, L-arginine, tetrahydrofuran, and deionized water is 0.02-0.04 mol: 0.01-0.02 mol: 10-50 mL: 10-50 mL.

4. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: In step A3, the usage ratio of allyltrimethoxysilane, ethanol-water mixed solution, intermediate, and 4-dimethylaminopyridine is 0.03-0.06 mol:120 mL:0.01-0.02 mol:0.25-0.50 g; the volume ratio of ethanol to deionized water in the ethanol-water mixed solution is 4:

1.

5. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: In step A4, the usage ratio of oxybenzone, glycidyl methacrylate, chloroform, and Amberlyst 15 ion exchange resin is 0.01-0.03 mol: 0.01-0.03 mol: 5-7 mL: 0.5 g.

6. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: In step A5, the usage ratio of the pre-product, pre-product 2, toluene, anhydrous ethanol, and azobisisobutyronitrile is 0.01-0.03 mol: 0.01-0.03 mol: 20-30 mL: 20-30 mL: 0.005 g.

7. The method for preparing a corrosion-resistant carat tube according to claim 1, characterized in that: The defoaming agent is fatty acid glyceride, the lubricant is magnesium sulfate, the dispersant is stearamide, and the stabilizer is potassium stearate.

8. A corrosion-resistant carat tube, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 7.

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