Corrosion-resistant aluminum alloy cable and method of making the same

Abstract

This application discloses a corrosion-resistant aluminum alloy cable and its preparation method, relating to the field of cables. It comprises, radially from the inside out, an aluminum alloy core, a first semi-conductive shielding layer, an insulation layer, a second semi-conductive shielding layer, an aluminum alloy shielding layer, an isolation layer, an armor layer, and an outer sheath. The aluminum alloy shielding layer is formed by wrapping an aluminum alloy strip around the surface of the second semi-conductive shielding layer and then forming an inner protective coating on its surface. The inner protective coating is prepared from components comprising the following parts by weight: 45-55 parts aromatic polyurethane resin, 50-80 parts two-dimensional transition metal carbide silane modified liquid, 0.8-1.3 parts organophosphate intercalated hydrotalcite, 0.5-1 part carbon nanotubes, 0.1-0.3 parts defoamer, and 0.1-0.3 parts leveling agent. This application improves the corrosion resistance of the electromagnetic shielding layer of the aluminum alloy cable when the outer sheath is damaged.

Description

Technical Field

[0001] This application relates to the field of cables, and in particular to a corrosion-resistant aluminum alloy cable and a method for preparing the same. Background Technology

[0002] As an indispensable and crucial component of modern power systems, cables undertake the core functions of power transmission and distribution. The stability and reliability of their performance directly affect the normal operation of the entire national economy and the energy security of social life. Traditional copper core cables are widely used due to their excellent conductivity, but they are also expensive and have high density. Therefore, aluminum alloy cables, with their lightweight and low-cost characteristics, are gradually becoming an alternative.

[0003] Since aluminum alloy cables use aluminum alloy as the core material, if copper is used as the electromagnetic shielding layer, the potential difference between aluminum and copper will cause contact and accelerated corrosion in humid or electrolyte-containing environments. Although there is usually an insulation layer between the electromagnetic shielding layer and the core material, there is still a risk of accelerated corrosion at joints, terminals, or damaged areas. Compared to using copper-aluminum transition clamps or coating with antioxidants, directly using aluminum alloy as the electromagnetic shielding layer is undoubtedly a fundamental solution to the problem.

[0004] Because aluminum alloy's conductivity is only 61% that of copper, a common practice to achieve electromagnetic shielding effects similar to copper shielding layers is to increase the thickness of the aluminum alloy electromagnetic shielding layer. However, this approach also presents problems. During transportation, installation, and use, the outer sheath of the cable is inevitably subjected to external impacts, friction, or internal stress concentrations, leading to scratches and internal microcracks. These become entry points for water, chloride ions, and other ions to corrode through capillary action. Increasing the thickness of the aluminum alloy shielding layer increases its circumferential area, resulting in a larger potential interface area for corrosive media. For cables with ultra-high aspect ratios, this increase in area poses a significant potential risk. However, current research on cable corrosion resistance primarily focuses on the outer sheath, with limited attention paid to the corrosion protection of the electromagnetic shielding layer itself. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned related technologies, this application provides a corrosion-resistant aluminum alloy cable and a method for preparing the same.

[0006] On the one hand, the corrosion-resistant aluminum alloy cable provided in this application adopts the following technical solution: A corrosion-resistant aluminum alloy cable includes an aluminum alloy core, a first semi-conductive shielding layer, an insulation layer, a second semi-conductive shielding layer, an aluminum alloy shielding layer, an isolation layer, an armor layer, and an outer sheath arranged radially from the inside to the outside. The aluminum alloy shielding layer is formed by wrapping an aluminum alloy strip around the surface of the second semiconductive shielding layer and then forming an inner protective coating on its surface; the inner protective coating is prepared from the following components in parts by weight: 45-55 parts of aromatic polyurethane resin, 50-80 parts of two-dimensional transition metal carbide silane modified liquid, 0.8-1.3 parts of organophosphate intercalated hydrotalcite, 0.5-1 parts of carbon nanotubes, 0.1-0.3 parts of defoamer and 0.1-0.3 parts of leveling agent.

[0007] Preferably, the weight ratio of the aromatic polyurethane resin to the two-dimensional transition metal carbide in the two-dimensional transition metal carbide silane modified liquid is 100:0.95-1.52.

[0008] Preferably, the two-dimensional transition metal carbide silane modified liquid is prepared by the following steps: mixing and stirring a silane coupling agent, water and a two-dimensional transition metal carbide dimethylformamide dispersion for 15-25 min; the mass-volume concentration of the two-dimensional transition metal carbide in the two-dimensional transition metal carbide dimethylformamide dispersion is 5-20 mg / mL.

[0009] Preferably, the mass-volume concentration of the two-dimensional transition metal carbide in the dimethylformamide dispersion of the two-dimensional transition metal carbide is 9-11 mg / mL.

[0010] Preferably, the weight ratio of the silane coupling agent, water, and two-dimensional transition metal carbide is 1:3-5:0.8-1.5.

[0011] By adopting the above scheme and controlling the ratio and reaction time, the silane coupling agent and its hydrolysis products coexist in the silane-modified solution of two-dimensional transition metal carbide. On the one hand, the combination of its hydrolysis products with the active groups on the two-dimensional transition metal carbide helps to reduce the oxidation degree of the two-dimensional transition metal carbide during film formation and improve the stability of the composite labyrinth structure formed by the two-dimensional transition metal carbide and organophosphate intercalated aluminum magnesium hydrotalcite. On the other hand, the remaining unhydrolyzed silane coupling agent lies dormant in the formed coating, waiting to combine with the trace water molecules that have penetrated through the isolation layer in the future, so as to prevent the presence of free water from accelerating corrosion. At the same time, the generated hydrolysis products will also establish a connection with the matrix or adjacent two-dimensional transition metal carbide or adjacent hydrotalcite in situ through silanol groups, blocking the diffusion channels of water molecules at the microscopic level.

[0012] Preferably, the silane coupling agent includes one or more of aminosilane, vinylsilane, and epoxysilane.

[0013] Preferably, the organophosphate intercalated hydrotalcite is prepared by the following steps: dispersing hydrotalcite in water, adding organophosphate, controlling the pH to 8.5-9.5, controlling the temperature to 55-65℃, stirring for 6-10 hours, filtering, washing until neutral, and drying to obtain organophosphate intercalated hydrotalcite.

[0014] Preferably, the weight ratio of the hydrotalcite to the organophosphate is 1.5-2.5:1.

[0015] Preferably, the hydrotalcite includes one or more of aluminum-magnesium hydrotalcite, cobalt-aluminum hydrotalcite, magnesium-aluminum-calcium hydrotalcite, and nickel-aluminum hydrotalcite.

[0016] Preferably, the organophosphate includes one or more of sodium aminotrimethylphosphonate, sodium hydroxyethylidene diphosphonate, and sodium ethylenediaminetetramethylphosphonate.

[0017] Preferably, the weight ratio of the carbon nanotubes to the two-dimensional transition metal carbide silane modified liquid is 1:0.475-1.52.

[0018] Preferably, the weight ratio of the carbon nanotubes to the two-dimensional transition metal carbide in the two-dimensional transition metal carbide silane modified solution is 1:50-160.

[0019] On the other hand, the method for preparing a corrosion-resistant aluminum alloy cable provided in this application adopts the following technical solution: A method for preparing a corrosion-resistant aluminum alloy cable includes the following steps: taking aluminum alloy monofilaments, stranding and pressing them together, and then annealing them to obtain an aluminum alloy core; extruding and cross-linking the aluminum alloy core surface using a three-layer co-extrusion process to obtain a first semi-conductive shielding layer, an insulation layer, and a second semi-conductive shielding layer, wherein the first and second semi-conductive shielding layers are made of cross-linked semi-conductive polymer materials, and the insulation layer uses polyethylene and peroxide cross-linking agents; wrapping an aluminum alloy strip around the second semi-conductive shielding layer and then forming an inner protective coating on its surface to obtain an aluminum alloy shielding layer; wrapping a semi-conductive buffer water-blocking strip around the surface of the aluminum alloy shielding layer to obtain an isolation layer; wrapping an aluminum alloy strip around the isolation layer surface in opposite directions with gaps to form an armor layer; and finally extruding and forming a polyvinyl chloride outer sheath on the surface of the armor layer to obtain a corrosion-resistant aluminum alloy cable.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. Under the synergistic effect of two-dimensional transition metal carbide silane modified liquid and organophosphate intercalated hydrotalcite, the two-dimensional structure forms a multi-dimensional physical barrier structure consisting of a composite labyrinth layer structure, a silane coupling agent hydrolysis product repair region, and an organophosphate repair region. At the same time, the silane coupling agent and the ion exchange with hydrotalcite chemically hinder the further erosion of water molecules and chloride ions at the microscopic level. Under the combined effect, the corrosion resistance of the aluminum alloy shielding layer is improved, which is beneficial to improving the corrosion resistance of aluminum alloy cables when the outer sheath is damaged.

[0021] 2. Using aluminum alloy as the substrate for the electromagnetic shielding layer fundamentally avoids accelerated corrosion caused by the potential difference between the electromagnetic shielding layer material (e.g., copper) and the aluminum alloy core when the outer sheath is damaged.

[0022] 3. The aluminum alloy strip with an inner protective coating provides basic electromagnetic shielding that meets the standards through the aluminum alloy strip substrate, while the electromagnetic shielding performance of the coating formed on the surface of the aluminum alloy strip by the inner protective coating reaches more than 30dB, further supplementing the electromagnetic shielding. The continuous conductive network composed of two-dimensional transition metal carbides and multi-walled carbon nanotubes can improve the risk resistance of the reinforced aluminum alloy shielding layer when the cable is not severely corroded. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the embodiments. The following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified, specific conditions in the following embodiments were performed under conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the methods used are conventional methods known in the art, and the consumables and reagents used are commercially available. Unless otherwise stated, the technical and scientific terms used herein have the same meaning as those familiar to those skilled in the art. Furthermore, any methods or materials similar to or equivalent to those described herein may also be applied to the present invention.

[0024] Example 1 Example 1 provides a corrosion-resistant aluminum alloy cable, the preparation method of which is as follows: AA8030 aluminum alloy monofilaments are stranded, pressed, and annealed to obtain an aluminum alloy core. The aluminum alloy core is then extruded using a three-layer co-extrusion process and cross-linked in a high-temperature and high-pressure nitrogen environment to obtain a first semi-conductive shielding layer, an insulation layer, and a second semi-conductive shielding layer. The first and second semi-conductive shielding layers are made of cross-linked semi-conductive polymer materials, and the insulation layer uses polyethylene and peroxide cross-linking agents.

[0025] The 5052-O aluminum alloy strip after decontamination is overlapped and wrapped on the outer surface of the second semiconductive shielding layer with an overlap rate of 10-20% bandwidth. An inner protective coating is applied to the surface of the aluminum alloy strip, and the inner protective coating is dried and cured in an inert atmosphere to obtain the aluminum alloy shielding layer. The preparation steps for the internal protective coating are as follows: Take 1 part by weight of 3-aminopropyltriethoxysilane (KH550), 4 parts by weight of water, and 1 part by weight of two-dimensional transition metal carbide (Ti3C2T). x Add dimethylformamide in the form of a 10 mg / mL dispersion and mix for 20 min to obtain a two-dimensional transition metal carbide silane modified solution (wherein the mass percentage content of two-dimensional transition metal carbide is 0.95%). Take 6 parts by weight of aluminum-magnesium hydrotalcite (Mg6Al2(OH)2). 16 CO3·4H2O) was dispersed in 150 parts by weight of water, and 3 parts by weight of sodium hydroxyethylidene diphosphonate were added. The pH was controlled at 9 and stirred continuously at 60°C for 8 hours. After filtration, the mixture was washed until neutral and then vacuum dried at 60°C for 12 hours to obtain organophosphate intercalated aluminum magnesium hydrotalcite. Take 50 parts by weight of aromatic polyurethane resin (solid content 35±2%, viscosity 25000-45000 mPa·s), 70 parts by weight of two-dimensional transition metal carbide silane modified liquid (of which two-dimensional transition metal carbide is 0.665 parts by weight), 0.6 parts by weight of multi-walled carbon nanotubes, 1 part by weight of organophosphate intercalated aluminum magnesium hydrotalcite, 0.2 parts by weight of BYK-024 defoamer and 0.2 parts by weight of BYK-346 leveling agent, mix them evenly, add dimethylformamide to adjust the viscosity to about 5000 mPa·s, stir at 1000 rpm for 20 minutes to obtain the inner protective coating.

[0026] An isolation layer is obtained by wrapping a semi-conductive buffer water-blocking tape with an overlap rate of 10-20% on the outer surface of the aluminum alloy shielding layer. An armor layer is formed by wrapping 5052-H14 aluminum alloy tape with gaps in opposite directions on the surface of the isolation layer. This provides mechanical protection for the aluminum alloy shielding layer and improves the electrical contact between the aluminum alloy shielding layer and the armor layer, thus enhancing the shielding. Finally, a polyvinyl chloride outer sheath is extruded onto the surface of the armor layer to obtain a corrosion-resistant aluminum alloy cable.

[0027] Example 2 Example 2 provides a corrosion-resistant aluminum alloy cable. The difference between Example 2 and Example 1 is that the inner protective coating of Example 2 contains 50 parts by weight of two-dimensional transition metal carbide silane modified liquid (of which two-dimensional transition metal carbide is 0.475 parts by weight), 1 part by weight of multi-walled carbon nanotubes, and 1.3 parts by weight of organophosphate intercalated aluminum magnesium hydrotalcite.

[0028] Example 3 Example 3 provides a corrosion-resistant aluminum alloy cable. The difference between Example 3 and Example 1 is that the inner protective coating of Example 3 contains 80 parts by weight of two-dimensional transition metal carbide silane modified liquid (of which two-dimensional transition metal carbide is 0.76 parts by weight), 0.5 parts by weight of multi-walled carbon nanotubes, and 0.8 parts by weight of organophosphate intercalated aluminum magnesium hydrotalcite.

[0029] Comparative Example 1 Comparative Example 1 provides an aluminum alloy cable. The difference between Comparative Example 1 and Example 1 is that the inner protective coating of Comparative Example 1 does not contain two-dimensional transition metal carbide silane modified liquid.

[0030] Comparative Example 2 Comparative Example 2 provides an aluminum alloy cable. The difference between Comparative Example 2 and Example 1 is that the inner protective coating of Comparative Example 2 does not contain organophosphate intercalated aluminum magnesium hydrotalcite.

[0031] Comparative Example 3 Comparative Example 3 provides an aluminum alloy cable. The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses 1.5 parts by weight of silane-modified two-dimensional transition metal carbide to replace 70 parts by weight of the two-dimensional transition metal carbide silane modification solution. The preparation steps of the silane-modified two-dimensional transition metal carbide are as follows: Take 1 part by weight of 3-aminopropyltriethoxysilane (KH550), 4 parts by weight of water, and 1 part by weight of two-dimensional transition metal carbide (Ti3C2T). x Add dimethylformamide in the form of a 10 mg / mL dispersion, mix and stir for 20 min, centrifuge, wash to remove unreacted 3-aminopropyltriethoxysilane, dry to obtain silane-modified two-dimensional transition metal carbide.

[0032] Comparative Example 4 Comparative Example 4 provides an aluminum alloy cable. The difference between Comparative Example 4 and Example 1 is that the two-dimensional transition metal carbide silane modified solution of Comparative Example 4 is prepared by the following steps: 1 part by weight of 3-aminopropyltriethoxysilane (KH550), 10 parts by weight of water, and 1 part by weight of two-dimensional transition metal carbide (Ti3C2T) are taken. x (Added as a 10 mg / mL dimethylformamide dispersion) and mixed and stirred for 4 hours.

[0033] Comparative Example 5 Comparative Example 5 provides an aluminum alloy cable. The difference between Comparative Example 5 and Example 1 is that the inner protective coating of Comparative Example 5 does not contain two-dimensional transition metal carbide silane modified liquid and organophosphate intercalated aluminum magnesium hydrotalcite.

[0034] Testing and Inspection (1) The aluminum alloy shielding layers of the corrosion-resistant aluminum alloy cables of Examples 1-3 and Comparative Examples 1-5 were tested using an electrochemical workstation to obtain corrosion current density, corrosion potential and protection efficiency (with the aluminum alloy shielding layer of Comparative Example 5 as the reference). Protection efficiency = (1 - corrosion current density after protection / corrosion current density of the reference) × 100%. The results are shown in Table 1 below.

[0035] Table 1: (2) Artificial scratches of consistent length, width and depth were made on the outer sheath of the corrosion-resistant aluminum alloy cables of Examples 1-3 and the aluminum alloy cables of Comparative Examples 1-5. The scratches extended to the armor layer. Then the cable samples were immersed in a 3.5wt% sodium chloride solution for 30 days. Finally, the corrosion current density and corrosion potential of the aluminum alloy shielding layer were re-detected using an electrochemical workstation, as shown in Table 2 below.

[0036] Table 2: (3) The electromagnetic shielding performance of the inner protective coatings made by the inner protective coatings used in the preparation of corrosion-resistant aluminum alloy cables in Examples 1-3 was tested according to GB / T 30142-2013. The results are shown in Table 3 below.

[0037] The following detailed description of this application is based on the experimental data provided in Table 1-2.

[0038] Referring to Table 1, the protection efficiency of the aluminum alloy shielding layer in the corrosion-resistant aluminum alloy cables of Examples 1-3 all reached over 99%, demonstrating excellent corrosion resistance. Using Comparative Examples 1, 2, and 5 as controls, Example 1 illustrates the effects of two-dimensional transition metal carbide silane modified liquid and organophosphate intercalated aluminum-magnesium hydrotalcite on the corrosion resistance of the aluminum alloy shielding layer in the corrosion-resistant aluminum alloy cable. The corrosion potential and protection efficiency of the aluminum alloy shielding layer in the corrosion-resistant aluminum alloy cable of Example 1 are significantly higher than those in Comparative Examples 1-2 and 5, while the corrosion current density is significantly lower, decreasing by nearly one to two orders of magnitude. The analysis is due to two main reasons. First, the two-dimensional transition metal carbides and aluminum-magnesium hydrotalcite on the surface of the aluminum alloy shielding layer in Example 1 form a composite labyrinth structure in the coating. Under the action of silanol groups in the silane hydrolysis products, the stability of the composite labyrinth structure is improved, and the erosion path of water and salt ions is prolonged. Second, when corroded by chloride ions, the hydroxyethylidene diphosphonate ions in the aluminum-magnesium hydrotalcite intercalation layer undergo ion exchange with chloride ions. This not only restricts the migration of chloride ions, but the released hydroxyethylidene diphosphonate ions can also form a protective film in situ at the damaged part of the aluminum alloy, constituting both chemical and physical protection. The combined effect improves the corrosion resistance of the aluminum alloy shielding layer, thereby improving the overall corrosion resistance of the aluminum alloy cable.

[0039] Compared with Comparative Examples 3 and 4, Example 1 demonstrates the effect of the modification of two-dimensional transition metal carbides and 3-aminopropyltriethoxysilane on the corrosion resistance of the aluminum alloy shielding layer in a corrosion-resistant aluminum alloy cable. The corrosion potential and protection efficiency of the aluminum alloy shielding layer in the corrosion-resistant aluminum alloy cable of Example 1 are significantly higher than those in the aluminum alloy cables of Comparative Examples 3-4, and the corrosion current density is significantly lower than that in the aluminum alloy shielding layers of Comparative Examples 3-4 and Comparative Example 5, decreasing by nearly 1-3 orders of magnitude. The analysis suggests that, on the one hand, the hydrolysis products of 3-aminopropyltriethoxysilane bind to the active groups on the two-dimensional transition metal carbide, which helps reduce the oxidation degree of the two-dimensional transition metal carbide during film formation while improving the stability of the composite maze structure formed by the two-dimensional transition metal carbide and the organophosphate intercalated aluminum magnesium hydrotalcite. On the other hand, the residual unhydrolyzed 3-aminopropyltriethoxysilane lies dormant in the formed coating. When water molecules invade, they are bound by the residual 3-aminopropyltriethoxysilane in the coating. At the same time, the generated hydrolysis products also establish connections with the matrix or adjacent two-dimensional transition metal carbide or adjacent hydrotalcite in situ through silanol groups, blocking the diffusion channels of water molecules at the microscopic level. In addition, a comparison of the results of Comparative Example 3 and Comparative Example 4 shows that in Comparative Example 3, unreacted 3-aminopropyltriethoxysilane was removed by centrifugation and washing; in Comparative Example 4, due to the increase in water volume and the extension of stirring time, the proportion of unhydrolyzed silane coupling agent in the system decreased. In this case, the corrosion potential and protection efficiency of the aluminum alloy shielding layer in the aluminum alloy cable of Comparative Example 4 are both higher than those in the aluminum alloy cable of Comparative Example 3, while the corrosion current density is lower. This is because adding the modified liquid facilitates the direct mixing of the two-dimensional transition metal carbides with polyurethane in a dispersed form, avoiding the agglomeration and redispersion process of the two-dimensional transition metal carbides and improving the uniformity of their dispersion.

[0040] In summary, the synergistic effect of the two-dimensional transition metal carbide silane modified liquid and the organophosphate intercalated aluminum magnesium hydrotalcite forms a multi-dimensional physical barrier structure, including a composite labyrinth layer structure, a silane coupling agent hydrolysis product repair region, and a hydroxyethylidene diphosphonate repair region. At the same time, it chemically hinders the further erosion of water molecules and chloride ions through consumption and ion exchange. Under the combined effect, the corrosion resistance of the aluminum alloy shielding layer is improved, thereby improving the overall corrosion resistance of the aluminum alloy cable.

[0041] Referring to Tables 1 and 2, a comparison of the corrosion potential and corrosion current density results in Tables 1 and 2 clearly shows that the corrosion resistance of the aluminum alloy cables in Examples 1-3 decreased significantly less in sodium chloride solution after artificial scratching than that of the aluminum alloy cables in Comparative Examples 1-5. The protection efficiency was calculated using the aluminum alloy shielding layer of Comparative Example 5 as a baseline for unprotected operation. When obtaining the data in Table 2, because the aluminum alloy shielding layer of Comparative Example 5 did not incorporate two-dimensional transition metal carbide silane modification liquid and organophosphate intercalated aluminum-magnesium hydrotalcite during its preparation, the polyurethane coating alone was insufficient to effectively block the erosion of sodium chloride solution during the simulated test. This resulted in a much faster rate of corrosion resistance decline compared to other groups. Therefore, the protection efficiency values ​​calculated for other groups using the severely corrosion-damaged aluminum alloy shielding layer of Comparative Example 5 as a reference are not meaningful for comparison.

[0042] In summary, this application improves the corrosion resistance of the aluminum alloy shielding layer in the event of damage to the outer sheath of the aluminum alloy cable by constructing an aluminum alloy shielding layer. Furthermore, using aluminum alloy as the substrate for the electromagnetic shielding layer avoids accelerated corrosion caused by the potential difference between the electromagnetic shielding layer material (e.g., copper) and the aluminum alloy core when the outer sheath is damaged. Additionally, referring to Table 3, the aluminum alloy strip with the inner protective coating provides adequate basic electromagnetic shielding through the aluminum alloy strip substrate, while the electromagnetic shielding performance of the coating formed on the surface of the aluminum alloy strip reaches over 30 dB, further supplementing the electromagnetic shielding. The continuous conductive network composed of two-dimensional transition metal carbides and multi-walled carbon nanotubes can enhance the risk resistance of the reinforced aluminum alloy shielding layer when the cable is not severely corroded.

[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A corrosion-resistant aluminum alloy cable, characterized in that: It includes an aluminum alloy wire core, a first semi-conductive shielding layer, an insulating layer, a second semi-conductive shielding layer, an aluminum alloy shielding layer, an isolation layer, an armor layer, and an outer sheath arranged radially from the inside to the outside. The aluminum alloy shielding layer is obtained by wrapping an aluminum alloy strip around the surface of the second semiconductive shielding layer and then forming an inner protective coating on its surface. The inner protective coating is prepared from the following components in parts by weight: 45-55 parts of aromatic polyurethane resin, 50-80 parts of two-dimensional transition metal carbide silane modified liquid, 0.8-1.3 parts of organophosphate intercalated hydrotalcite, 0.5-1 parts of carbon nanotubes, 0.1-0.3 parts of defoamer and 0.1-0.3 parts of leveling agent.

2. The corrosion-resistant aluminum alloy cable according to claim 1, characterized in that: The two-dimensional transition metal carbide silane-modified liquid is prepared by the following steps: mixing silane coupling agent, water and a two-dimensional transition metal carbide dimethylformamide dispersion, and stirring for 15-25 min; the mass-volume concentration of the two-dimensional transition metal carbide in the two-dimensional transition metal carbide dimethylformamide dispersion is 5-20 mg / mL.

3. The corrosion-resistant aluminum alloy cable according to claim 2, characterized in that: The weight ratio of the silane coupling agent, water, and two-dimensional transition metal carbide is 1:3-5:0.8-1.

5.

4. The corrosion-resistant aluminum alloy cable according to claim 2, characterized in that: The silane coupling agent includes one or more of aminosilane, vinylsilane, and epoxysilane.

5. The corrosion-resistant aluminum alloy cable according to claim 1, characterized in that: The organophosphate intercalated hydrotalcite is prepared by the following steps: dispersing hydrotalcite in water, adding organophosphate, controlling the pH to 8.5-9.5, controlling the temperature to 55-65℃, stirring for 6-10 hours, filtering, washing until neutral, and drying to obtain organophosphate intercalated hydrotalcite.

6. The corrosion-resistant aluminum alloy cable according to claim 5, characterized in that: The weight ratio of the hydrotalcite to the organophosphate is 1.5-2.5:

1.

7. The corrosion-resistant aluminum alloy cable according to claim 5, characterized in that: The hydrotalcite includes one or more of aluminum-magnesium hydrotalcite, cobalt-aluminum hydrotalcite, magnesium-aluminum-calcium hydrotalcite, and nickel-aluminum hydrotalcite.

8. The corrosion-resistant aluminum alloy cable according to claim 5, characterized in that: The organophosphates include one or more of sodium aminotrimethylphosphonate, sodium hydroxyethylidene diphosphonate, and sodium ethylenediaminetetramethylphosphonate.

9. The corrosion-resistant aluminum alloy cable according to claim 1, characterized in that: The weight ratio of the carbon nanotubes to the two-dimensional transition metal carbide silane modified liquid is 1:50-160.

10. A method for preparing a corrosion-resistant aluminum alloy cable as described in any one of claims 1-9, characterized in that: Includes the following steps: Aluminum alloy wire cores are obtained by twisting, pressing, and annealing aluminum alloy monofilaments together. A first semiconductive shielding layer, an insulating layer, and a second semiconductive shielding layer are obtained by extruding and cross-linking an aluminum alloy wire core using a three-layer co-extrusion process. The first and second semiconductive shielding layers are made of cross-linked semiconductive polymer materials, and the insulating layer uses polyethylene and peroxide cross-linking agents. An aluminum alloy strip is wrapped around the second semiconductive shielding layer, and an inner protective coating is formed on its surface to obtain an aluminum alloy shielding layer. A semiconductive buffer water-blocking strip is wrapped around the surface of the aluminum alloy shielding layer to obtain an isolation layer. An armor layer is formed by wrapping aluminum alloy strips around the surface of the isolation layer in opposite directions with gaps; finally, a polyvinyl chloride outer sheath is extruded onto the surface of the armor layer to obtain a corrosion-resistant aluminum alloy cable.

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