A corrosion-resistant electric power pipe and preparation method thereof

Abstract

The invention relates to a corrosion-resistant electric power pipe and a preparation method thereof, belonging to the technical field of polymer materials; the electric power pipe comprises, by weight percentage, 12-17wt% of glass fiber powder, 3.5-5wt% of filler, 2.2-3.5wt% of anti-corrosion aid, 0.16-0.22wt% of nucleating agent, 0.3-0.4wt% of lubricant and 0.08-0.1wt% of antioxidant, and the balance is polypropylene resin; the anti-corrosion aid is prepared by amine ester exchange between diethyl difluoromalonate and tetraethylenepentamine to obtain an intermediate, and then a chlorinated short-chain alkane is first fully substituted with an active secondary amine on a molecular chain of the intermediate, and then a highly active iodinated long-chain alkane is further reacted with a tertiary amine substituted in the chain at a high temperature to form a quaternary ammonium structure in the chain, and a long-chain alkyl is introduced to modify the molecular chain of the intermediate to obtain the anti-corrosion aid, which effectively improves the corrosion resistance of the electric power pipe in a buried environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and in particular, relates to a corrosion-resistant electric power pipe and a preparation method thereof. Background Art

[0002] In the power system, power pipes are one of the important components responsible for transmitting electricity. Traditional power pipeline materials and construction methods have many defects in the face of growing power demand and complex urban environments. For example, traditional PVC (polyvinyl chloride) power pipes may experience performance degradation due to temperature changes or aging during long-term use, resulting in a shortened service life of the pipes and certain safety hazards. PP (polypropylene), as a high-performance polymer material, has attracted widespread attention in the field of power pipes. PP materials have excellent mechanical properties, chemical corrosion resistance, high toughness and softness, which are more advantageous than traditional PVC materials. Through blending and modification, not only the overall strength and weather resistance of the pipes are improved, but also the adaptability to changes in the external environment is enhanced.

[0003] However, existing PP power pipes have limitations in terms of corrosion resistance, especially for power pipes buried in the soil for a long time, their corrosion resistance is insufficient, which directly affects the service life and transmission efficiency of the power pipes. Long-term corrosion will cause the power pipe wall to become thinner, reduce mechanical strength, and even cause the power pipe to fail, which may lead to interruption of power supply, bringing serious impact on people's normal life and production activities.

[0004] In the prior art, through the composite pipe production technology, fluororesin with high corrosion resistance is compounded to the surface of the base pipe, which can effectively improve the corrosion resistance of the power pipe. However, the production process of this type of pipe is complicated, especially in the large-diameter pipe, the production is difficult, and the bonding strength between the fluororesin and the base pipe is not high, which can easily cause the surface layer to detach during installation and use. There is also a blending technology that directly compounds the fluororesin in the pipe raw material, which can improve the corrosion resistance of the pipe to a certain extent. However, as a polymer material, fluororesin has poor dispersibility in the matrix, and the amount of addition is greatly limited. Excessive addition will greatly reduce the mechanical properties. Summary of the invention

[0005] In order to solve the technical problems mentioned in the background technology, the purpose of the present invention is to provide a corrosion-resistant power pipe and a preparation method thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A corrosion-resistant electric power pipe comprises the following raw materials by weight percentage:

[0008] Glass fiber powder 12-17wt%, filler 3.5-5wt%, anti-corrosion additive 2.2-3.5wt%, nucleating agent 0.16-0.22wt%, lubricant 0.3-0.4wt% and antioxidant 0.08-0.1wt%, and the balance is polypropylene resin.

[0009] The anti-corrosion additive is prepared by the following method:

[0010] Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 35-45°C, diethyl difluoromalonate is added and the mixture is reacted for 3-4 hours, and then the temperature is continued to be raised to 65-70°C and refluxed for 1.5-2.2 hours. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate;

[0011] Furthermore, the feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10mmol:11-13mmol:10-15mg:17-25mL. Under the promotion of potassium tert-butoxide, diethyl difluoromalonate and tetraethylenepentamine undergo amine ester exchange to form a chain fluorine-containing amide compound.

[0012] Step A2: premix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 45-70°C for reaction for 2.5-4.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 95-105°C and continue to reflux for 9-14h, after the reaction is completed, remove dioxane by reduced pressure rotary evaporation, wash the substrate with ethanol and dry it to obtain an anti-corrosion additive.

[0013] Furthermore, the feed ratio of the intermediate, chlorinated short-chain alkane, iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1g:9-12mmol:15-20mmol:10-20mg:35-60mg:20-25mL. The chlorinated short-chain alkane is a small molecule raw material, which is preferentially substituted with the active secondary amine on the intermediate molecular chain to reduce the polarity of the intermediate molecular chain. Then, hexadecyltrimethylammonium bromide is used as a phase transfer agent to promote the quaternization reaction of the iodinated long-chain alkane and the substituted tertiary amine under high temperature reflux, and the long-chain alkyl is introduced to modify the intermediate molecular chain.

[0014] Preferably, the chlorinated short-chain alkane is one of 1-chloropropane and 1-chloropentane.

[0015] Preferably, the iodinated long-chain alkane is one of 1-iodododecane and 1-iodooctadecane.

[0016] Preferably, the filler is silane-modified nano-silicon dioxide, which improves the fluidity of the melt in the composite system and helps to improve the density of the pipe.

[0017] Preferably, the lubricant is compounded from polypropylene wax and calcium stearate, and has both internal and external lubricity in the composite system, which is beneficial to improving the surface quality of the pipe.

[0018] A method for preparing a corrosion-resistant power pipe comprises the following steps:

[0019] Step S1: Mix all the raw materials in a high-speed mixer, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials and cut them into pellets to obtain modified masterbatch;

[0020] Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 8-13 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

[0021] Beneficial effects of the present invention:

[0022] The invention is based on the existing modified polypropylene system for power pipes, and is compounded with a self-developed anti-corrosion additive for blending and modification, so as to effectively improve the corrosion resistance of the power pipes; the anti-corrosion additive is prepared by amine ester exchange between diethyl difluoromalonate and tetraethylenepentamine to form a small molecular chain fluorine-containing amide compound, i.e., an intermediate, and then the chlorinated short-chain alkane is first fully substituted with the active secondary amine on the intermediate molecular chain to reduce the overall polarity of the intermediate molecular chain, which is conducive to dispersion into the polypropylene matrix during the blending process, and then the highly active iodinated long-chain alkane is further quaternized with the tertiary amine substituted in the chain at high temperature to form a chain A quaternary ammonium structure is prepared and a long-chain alkyl group is introduced to modify the molecular chain of the intermediate part, thereby obtaining an anti-corrosion agent. During the hot forming process of the pipe, the fluorine structure of the anti-corrosion agent undergoes a segregation effect and migrates to the surface of the pipe, forming an interwoven enrichment layer of fluorine structure and quaternary ammonium structure on the surface of the pipe. The fluorine element itself has excellent chemical inertness and extremely low surface energy, so a protective layer is formed on the surface of the pipe to reduce the corrosion of the substrate by external fungi or corrosive media. In addition, the quaternary ammonium structure enriched on the surface has an inhibitory effect on most fungi, especially in common soil burial environments, and can effectively reduce the corrosion caused by fungal adhesion. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1, preparing a corrosion-resistant power pipe, the specific implementation process is as follows:

[0025] (1) Preparation of anti-corrosion additives

[0026] Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 35°C, diethyl difluoromalonate is added and the mixture is reacted for 4 hours, and then the temperature is continued to be raised to 65°C and refluxed for 2.2 hours, wherein the feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10mmol:11mmol:10mg:25mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate.

[0027] Step A2: pre-mix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 45°C for reaction for 2.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 95°C and continue reflux reaction for 9h, wherein the feed ratio of the intermediate, chlorinated short-chain alkane, iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1g:9mmol:15mmol:20mg:35mg:20mL, the chlorinated short-chain alkane is 1-chloropropane, and the iodinated long-chain alkane is 1-iodododecane. After the reaction, the dioxane is removed by reduced pressure rotary evaporation, and the substrate is washed and dried with ethanol to obtain an anti-corrosion additive.

[0028] (2) Preparation of corrosion-resistant power pipes

[0029] Ingredients: The raw materials are taken according to weight percentage, glass fiber powder 12wt%, selected from 1000 mesh alkali-free glass fiber powder; filler 5wt%, selected from TSP-L12 type silane-modified nano-silica; anti-corrosion additive 2.2wt%, homemade in this embodiment; nucleating agent 0.22wt%, selected from XT-386 type nucleating agent; lubricant 0.3wt%, selected from QY-300P type polypropylene wax and industrial agent calcium stearate in equal weight compound; antioxidant 0.08wt%, selected from antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1 compound; the balance is EPS31HP type polypropylene resin.

[0030] Step S1: Add all raw materials into a high-speed mixer and mix them at 1200 rpm for 10 min, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials, and cut them into pellets to obtain modified masterbatch.

[0031] Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 8 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

[0032] Example 2, preparing a corrosion-resistant power pipe, the specific implementation process is as follows:

[0033] (1) Preparation of anti-corrosion additives

[0034] Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 45°C, diethyl difluoromalonate is added and the mixture is reacted for 3 hours, and then the temperature is continued to be raised to 70°C and refluxed for 1.5 hours, wherein the feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10mmol:13mmol:15mg:17mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate.

[0035] Step A2: pre-mix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 70°C for reaction for 4.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 105°C and continue to reflux for 14h, wherein the feed ratio of the intermediate, chlorinated short-chain alkane, iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1g:12mmol:20mmol:10mg:60mg:25mL, the chlorinated short-chain alkane is 1-chloropentane, and the iodinated long-chain alkane is 1-iodooctadecane. After the reaction, the dioxane is removed by reduced pressure rotary evaporation, and the substrate is washed and dried with ethanol to obtain an anti-corrosion additive.

[0036] (2) Preparation of corrosion-resistant power pipes

[0037] Ingredients: The raw materials are taken according to weight percentage, glass fiber powder 17wt%, selected from 1000 mesh alkali-free glass fiber powder; filler 3.5wt%, selected from TSP-L12 type silane-modified nano-silica; anti-corrosion additive 3.5wt%, homemade in this embodiment; nucleating agent 0.16wt%, selected from XT-386 type nucleating agent; lubricant 0.4wt%, selected from QY-300P type polypropylene wax and industrial agent calcium stearate in equal weight compound; antioxidant 0.1wt%, selected from antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1 compound; the balance is EPS31HP type polypropylene resin.

[0038] Step S1: Add all raw materials into a high-speed mixer and mix them at 1200 rpm for 10 min, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials, and cut them into pellets to obtain modified masterbatch.

[0039] Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 13 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

[0040] Example 3, preparing a corrosion-resistant power pipe, the specific implementation process is as follows:

[0041] (1) Preparation of anti-corrosion additives

[0042] Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 40°C, diethyl difluoromalonate is added and the mixture is reacted for 3.5 hours, and then the temperature is continued to be raised to 68°C and refluxed for 1.8 hours, wherein the feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10mmol:12mmol:12mg:20mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate.

[0043] Step A2: pre-mix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 70°C for reaction for 3.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 100°C and continue to reflux for 12h, wherein the feed ratio of the intermediate, chlorinated short-chain alkane, iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1g:10mmol:18mmol:15mg:40mg:25mL, the chlorinated short-chain alkane is 1-chloropentane, and the iodinated long-chain alkane is 1-iodododecane. After the reaction, the dioxane is removed by reduced pressure rotary evaporation, and the substrate is washed and dried with ethanol to obtain an anti-corrosion additive.

[0044] (2) Preparation of corrosion-resistant power pipes

[0045] Ingredients: The raw materials are taken according to weight percentage, glass fiber powder 15wt%, selected from 1000 mesh alkali-free glass fiber powder; filler 4.2wt%, selected from TSP-L12 type silane-modified nano-silica; anti-corrosion additive 2.8wt%, homemade by this embodiment; nucleating agent 0.19wt%, selected from XT-386 type nucleating agent; lubricant 0.35wt%, selected from QY-300P type polypropylene wax and industrial agent calcium stearate in equal weight compound; antioxidant 0.1wt%, selected from antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1 compound; the balance is EPS31HP type polypropylene resin.

[0046] Step S1: Add all raw materials into a high-speed mixer and mix them at 1200 rpm for 10 min, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials, and cut them into pellets to obtain modified masterbatch.

[0047] Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 10 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

[0048] Example 4, preparing a corrosion-resistant power pipe, the specific implementation process is as follows:

[0049] (1) Preparation of anti-corrosion additives

[0050] Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 40°C, diethyl difluoromalonate is added and the mixture is reacted for 4 hours, and then the temperature is continued to be raised to 65°C and refluxed for 2 hours, wherein the feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10mmol:11mmol:13mg:22mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate.

[0051] Step A2: pre-mix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 50°C for reaction for 3.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 100°C and continue reflux reaction for 10h, wherein the feed ratio of the intermediate, chlorinated short-chain alkane, iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1g:10mmol:15mmol:15mg:50mg:25mL, the chlorinated short-chain alkane is 1-chloropropane, and the iodinated long-chain alkane is 1-iodooctadecane. After the reaction, the dioxane is removed by reduced pressure rotary evaporation, and the substrate is washed and dried with ethanol to obtain an anti-corrosion additive.

[0052] (2) Preparation of corrosion-resistant power pipes

[0053] Ingredients: The raw materials are taken according to weight percentage, glass fiber powder 14wt%, selected from 1000 mesh alkali-free glass fiber powder; filler 4.5wt%, selected from TSP-L12 type silane-modified nano-silica; anti-corrosion additive 3.2wt%, homemade in this embodiment; nucleating agent 0.18wt%, selected from XT-386 type nucleating agent; lubricant 0.35wt%, selected from QY-300P type polypropylene wax and industrial agent calcium stearate in equal weight; antioxidant 0.09wt%, selected from antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1; the balance is EPS31HP type polypropylene resin.

[0054] Step S1: Add all raw materials into a high-speed mixer and mix them at 1200 rpm for 10 min, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials, and cut them into pellets to obtain modified masterbatch.

[0055] Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 12 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

[0056] In Comparative Example 1, referring to the prior art, fluororubber and polyquaternary ammonium salt are blended and modified with polypropylene resin. The specific formula refers to Example 4, no anti-corrosion additive is added, 3wt% of FKM-26 fluororubber and 0.2wt% of polyquaternary ammonium salt-7 are added, and the rest of the implementation process is exactly the same.

[0057] Comparative Example 2, referring to Comparative Example 1, the amount of FKM-26 fluororubber is increased to 8wt%, the amount of polyquaternium-7 is increased to 0.5wt%, and the remainder is polypropylene resin to supplement to 100wt%.

[0058] The modified masterbatch prepared as above was taken, hot-pressed at 220° C. and a pressure of 1.5 MPa using a flat vulcanizer, spray-cooled to set the shape, and then baked at 100° C. for 10 minutes to prepare a sheet sample.

[0059] Buried corrosion test: Municipal sludge was sieved, and the sample was immersed in the sludge and placed in a 30℃ constant temperature box for 3 months, then rinsed with water and dried with hot air;

[0060] Medium corrosion test: prepare 10wt% sodium chloride solution, 5wt% sulfuric acid solution and 5wt% sodium hydroxide solution as corrosion media respectively, immerse the sample in the corrosion media, and place it in a 30℃ constant temperature box for 168h, then rinse with water and dry with hot air;

[0061] The tensile strength of the sample before and after corrosion was tested according to GB / T 1040.2-2022 standard. The tensile strength loss rate of the sample was used to characterize the degree of corrosion of the sample. Tensile strength loss rate = (tensile strength before corrosion - tensile strength after corrosion) / tensile strength before corrosion × 100%; the specific test results are shown in Table 1:

[0062] Table 1

[0063]

[0064] It can be seen from the test results in Table 1 that the material prepared in the example shows good corrosion resistance in acid, alkali, salt and sludge, and the material maintains a high mechanical strength.

[0065] Based on the above test results, the samples were subjected to a microbial adhesion test, specifically: CGMCC 4.1825 Rhodococcus was used as the bacterial source, activated and cultured to a concentration of 10 8 CFU / mL of bacterial solution, the sample was sterilized by saturated steam fumigation, the sample was immersed in the bacterial solution and cultured for 48 hours, the sample was taken out and immersed in sterile saline to remove the non-adherent strains, then placed in saline for shaking, and samples were taken from the washing liquid for culture, and the colony adhesion amount was counted. The specific test results are shown in Table 2:

[0066] Table 2

[0067]

[0068] From the test results in Table 2, it can be seen that the surface of the material prepared in the embodiment is less prone to surface viscosity fungi than that of the comparative example.

[0069] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A corrosion-resistant power pipe, characterized in that: The following raw materials are included in percentage by weight: Glass fiber powder 12-17wt%, filler 3.5-5wt%, anti-corrosion additive 2.2-3.5wt%, nucleating agent 0.16-0.22wt%, lubricant 0.3-0.4wt% and antioxidant 0.08-0.1wt%, the balance is polypropylene resin; The anti-corrosion additive is prepared by the following method: Step A1: tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran are mixed, dry nitrogen is introduced for protection, the temperature is pre-heated to 35-45°C, diethyl difluoromalonate is added and the mixture is reacted for 3-4 hours, and then the temperature is continued to be raised to 65-70°C and refluxed for 1.5-2.2 hours. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, the substrate is washed with water, the aqueous phase is removed and dried in vacuo to obtain an intermediate; Step A2: premix the intermediate, potassium hydroxide and dioxane, add chlorinated short-chain alkane, mix and heat to 45-70°C for reaction for 2.5-4.5h, then add iodinated long-chain alkane and hexadecyltrimethylammonium bromide, continue to heat to 95-105°C and continue reflux reaction for 9-14h, after the reaction is completed, remove dioxane by reduced pressure rotary evaporation, wash and dry the substrate with ethanol to obtain an anti-corrosion additive, wherein the chlorinated short-chain alkane is one of 1-chloropropane and 1-chloropentane.

2. The corrosion-resistant electric power pipe according to claim 1, characterized in that: The feed ratio of diethyl difluoromalonate, tetraethylenepentamine, potassium tert-butoxide and anhydrous tetrahydrofuran is 10 mmol: 11-13 mmol: 10-15 mg: 17-25 mL.

3. The corrosion-resistant electric power pipe according to claim 2, characterized in that: The feed ratio of the intermediate, the chlorinated short-chain alkane, the iodinated long-chain alkane, potassium hydroxide, hexadecyltrimethylammonium bromide and dioxane is 1 g: 9-12 mmol: 15-20 mmol: 10-20 mg: 35-60 mg: 20-25 mL.

4. The corrosion-resistant electric power pipe according to claim 3, characterized in that: The iodinated long-chain alkane is one of 1-iodododecane and 1-iodooctadecane.

5. The corrosion-resistant electric power pipe according to claim 1, characterized in that: The filler is silane-modified nano-silica.

6. The corrosion-resistant electric power pipe according to claim 1, characterized in that: The lubricant is compounded from polypropylene wax and calcium stearate.

7. A method for preparing a corrosion-resistant electric power pipe according to any one of claims 1 to 6, characterized in that: The steps include: Step S1: Mix all the raw materials in a high-speed mixer, transfer them into a mixer and mix them at 190° C. until the torque is stable, cool the discharged materials and cut them into pellets to obtain modified masterbatch; Step S2: The modified masterbatch is extruded at 220° C. using an extruder, spray-cooled to set the shape, and then baked in a tunnel furnace at 100° C. for 8-13 minutes. After natural cooling, a corrosion-resistant power pipe is obtained.

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