A plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment and its preparation method.

Abstract

This invention provides a plating solution and its preparation method for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment. The plating solution incorporates one-dimensional and two-dimensional materials, along with zero-dimensional silver nanoparticles, to form a multi-dimensional framework. This results in excellent dispersibility of the plating solution under different silver concentrations, with no significant stratification or agglomeration. The novel plating solution of this invention, by introducing one-dimensional and two-dimensional materials into the silver plating solution, creates a silver paste with excellent dispersibility, achieving long-term storage and low cost while maintaining a simple process. Furthermore, silver plating solutions of different concentrations and viscosities can be obtained by controlling the amount of ethylene glycol solvent added. When used as a silver plating solution for copper, this invention solves the problem of poor compatibility of copper with fluorocarbon-based environmentally friendly insulating gases, and also addresses the issues of high cost, poor dispersibility, fixed viscosity, fixed concentration, and poor adhesion associated with using only silver paste for plating.

Description

Technical Field

[0001] This invention relates to the field of nanomaterials and metal coating technology, specifically to a coating solution and its preparation method for improving the compatibility of metals with environmentally friendly alternative gases in gas insulation equipment. Background Technology

[0002] SF6 is a widely recognized greenhouse gas with significant environmental hazards. Its greenhouse effect is 23,500 times that of CO2, and it can remain in the atmosphere for over 3,200 years. To combat the threat of global warming, it is necessary not only to reduce CO2 emissions but also to decrease emissions of the highly greenhouse-producing SF6. This makes the search for environmentally friendly insulating media in electrical equipment a key research focus and challenge for the power industry.

[0003] However, for new environmentally friendly gases, the requirements are not only that they must possess excellent insulation properties, but also that they have good compatibility with the solid materials constituting the equipment. If the materials inside the equipment are not compatible with the new environmentally friendly gas, it may lead to a chemical reaction between the gas components and the materials, altering the material properties. This poses a danger to the normal operation of the gas-insulated equipment and hinders its long-term safe operation. Currently, environmentally friendly insulating media considered to have potential replacement potential include perfluoroisobutyronitrile (C4F7N) and perfluoropentanone (C5F7N). 10 O), perfluorohexanone (C6F) 12 Fluorocarbons such as O (oxygen oxides) decompose under electrothermal action with copper, a key metallic material in the equipment's gas chamber, causing the insulation medium to decompose and resulting in corrosion of the copper surface. Meanwhile, these environmentally friendly insulating media exhibit good compatibility with silver; therefore, silver plating on key structures within the equipment's gas chamber is an effective method to prevent copper corrosion.

[0004] Common methods for plating metal surfaces include electroplating, electroless plating, hot-dip plating, spraying, and sputtering. Applying a silver paste layer to the surface of copper is a common method, but silver paste has disadvantages such as high cost (high proportion of heavy metals), poor dispersibility (particles in silver paste tend to aggregate and precipitate), and difficulty in preservation (it is prone to stratification during long-term storage). Summary of the Invention

[0005] To address the existing problems of poor compatibility of copper metal with fluorocarbon-based environmentally friendly insulating media, existing silver plating solutions suffer from high cost, poor dispersibility, fixed viscosity and concentration, and poor adhesion. This paper proposes a plating solution and its preparation method to improve the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment. By designing a novel silver plating solution with a specific formulation, the solution can be plated on the surface of copper metal, achieving a strong bond with the metal material, exhibiting significant adhesion and microhardness, while also possessing excellent chemical stability and corrosion resistance.

[0006] A plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment and its preparation method include the following steps:

[0007] Step 1) Mix silver metal powder, carbon nanotube powder and graphene oxide powder in a certain proportion;

[0008] Step 2) After adding isopropanol to the product obtained in Step 1), transfer it to a ball mill for ball milling;

[0009] Step 3) Place the product obtained in step 2) into an oven for a certain period of time to dry at high temperature;

[0010] Step 4) Place the product obtained in step 3) into a mortar and grind it until there is no obvious grainy texture;

[0011] Step 5) Place the mixture obtained in Step 4) into a ground glass bottle and add a magnetic stir bar, binder and a certain amount of ethylene glycol solution, place it on a magnetic stirrer and stir. After mixing and stirring for a certain period of time, perform ultrasound to obtain the prepared silver plating solution.

[0012] Furthermore, in step 1), the amount of silver nanoparticles used is 30-60 mg, the amount of carbon nanotube powder is 35-45 mg, the amount of graphene oxide powder is 5-15 mg, and the amount of isopropanol used in step 2) is 392.75-785.5 mg.

[0013] Furthermore, in step 2), the ball mill speed is 300-450 r / min, and the grinding time is 5-8 h.

[0014] Furthermore, in step 3), the oven temperature is 80℃ and the drying time is 8-10 hours.

[0015] Furthermore, the grinding time in step 4) is 10-15 min.

[0016] Furthermore, the adhesive mentioned in step 5) is a CMC solution or a PVDF solution.

[0017] Furthermore, in step 5), CMC solution is used as a binder with a concentration of 20-25 mg / mL and a dosage of 0.5 mL, while ethylene glycol is used in a dosage of 556.5-1669.5 mg.

[0018] Furthermore, in step 5), the magnetic stirrer rotates at 600 r / min and the stirring time is 8-10 h. An ultrasonic cleaner is used for ultrasonic cleaning, with the power of the ultrasonic cleaner set to 80% and the ultrasonic cleaning time being 0.5-1 h.

[0019] A plating solution prepared according to the above preparation method.

[0020] A plating solution prepared according to the above preparation method is used as a silver plating solution to plate copper surfaces, serving as an application to protect copper metal materials from corrosion by carbon-fluorine environmentally friendly insulating gases.

[0021] This invention, by adjusting the composition of the plating solution and the ratio of different components, can control the production of silver plating solutions with good dispersibility and different silver concentrations and viscosities, thereby improving the problem of poor compatibility between copper metal and carbon-fluorine environmentally friendly insulating gases in gas-insulated equipment. This method designs a novel plating solution formulation with excellent dispersibility. By mixing one-dimensional carbon nanotubes with two-dimensional graphene oxide powder, the resulting plating solution exhibits good dispersibility and does not show stratification or agglomeration during long-term storage. It also boasts relatively low cost by reducing the amount of heavy silver powder used by mixing metallic silver powder with carbon nanotubes and graphene oxide powder. The viscosity is adjustable; by controlling the amount of ethylene glycol added, the viscosity of the plating solution can be accurately controlled, allowing for the preparation of plating solutions with different viscosities to meet various application requirements. The plating solution exhibits good adhesion, bonding firmly to metal materials with significant adhesion and microhardness. It also possesses excellent chemical stability and corrosion resistance, protecting copper metal from corrosion in a fluorocarbon-based environmentally friendly insulating gas atmosphere. Furthermore, it demonstrates strong conductivity; in electrical equipment, copper serves as a metal conductor, and the materials plated on it also require good conductivity. This invention's novel formulation incorporates highly conductive one-dimensional carbon nanotubes and two-dimensional conductive graphene oxide powder to form a multi-dimensional conductive network, resulting in excellent conductivity in the plating solution.

[0022] The beneficial effects of this invention are as follows: Based on the plating process and nanocomposite material process, zero-dimensional silver metal particles are mixed, stirred, and ultrasonically stirred with one-dimensional carbon nanotubes, two-dimensional graphene oxide powder, CMC solution (or PVDF solution) as a binder, and ethylene glycol as a solvent to produce a silver plating solution with low cost, good dispersibility, easy storage, good adhesion after plating, high conductivity, and strong corrosion resistance. When the plating solution prepared by this invention is used to plate the copper metal surface in medium and low pressure gas insulation equipment, it can protect copper from corrosion in a carbon-fluorine environmentally friendly insulating gas environment. Attached Figure Description

[0023] Figure 1 These are effect diagrams of the three embodiments of the present invention plated on copper;

[0024] Figure 2 This is a graph showing the changes in the low-content silver plating solution (silver nanoparticle content 30%-40%) over time (10 min, 1 h, 5 h) in Example 1 of the present invention.

[0025] Figure 3 This is a graph showing the change of silver content (silver nanoparticle content 40%-50%) in the silver plating solution in Example 2 of the present invention over time (10 min, 1 h, 5 h);

[0026] Figure 4 This is a graph showing the change of the high-content silver plating solution (silver nanoparticle content 60%-90%) in Example 3 of the present invention over time (10 min, 1 h, 5 h);

[0027] Figure 5 This is the result of long-term standing (24h×7) of the low-content silver plating solution (silver nanoparticle content 30%-40%) in Example 1 of the present invention;

[0028] Figure 6 This is the result of the silver plating solution (silver nanoparticle content 40%-50%) in Example 2 of the present invention being left to stand for a long time (24h×7);

[0029] Figure 7 This is the result of long-term standing (24h×7) of the high-content silver plating solution (silver nanoparticle content 60%-90%) in Example 3 of the present invention.

[0030] Figure 8 This is a flowchart of a method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment, according to the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 8 As shown, this invention provides a method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment, comprising the following steps:

[0033] Step 1) Mix silver metal powder, carbon nanotube powder and graphene oxide powder in a certain proportion;

[0034] Step 2) After adding isopropanol to the product obtained in Step 1), transfer it to a ball mill for ball milling;

[0035] Step 3) Place the product obtained in step 2) into an oven for a certain period of time to dry at high temperature;

[0036] Step 4) Place the product obtained in step 3) into a mortar and grind it until there is no obvious grainy texture;

[0037] Step 5) Place the mixture obtained in Step 4) into a ground glass bottle and add a magnetic stir bar, binder and a certain amount of ethylene glycol solution, place it on a magnetic stirrer and stir. After mixing and stirring for a certain period of time, perform ultrasound to obtain the prepared silver plating solution.

[0038] The experimental results show that by introducing one-dimensional carbon nanotubes and two-dimensional graphene oxide powder into the plating solution, which together with zero-dimensional silver nanoparticles form a three-dimensional framework network, the plating solution exhibits good dispersibility, ease of storage, and good adhesion. Furthermore, in plating solutions with different silver contents and viscosities, it achieves characteristics such as low cost, good dispersibility, adjustable viscosity, good adhesion after plating, high conductivity, and strong corrosion resistance. Therefore, the main difference between different implementation methods lies in controlling the silver nanoparticle content (step 1). Based on the different amounts of silver nanoparticles added, the solutions are numbered as low-content silver plating solutions, medium-content silver plating solutions, and high-content silver plating solutions.

[0039] Table 1 Comparison of silver nanoparticle content in different examples

[0040]

[0041] exist Figure 1 The images show the effects of low, medium, and high silver nanoparticle content plating on copper. As the silver nanoparticle content in the slurry increases, the color of the copper plating gradually deepens after drying.

[0042] Example 1: Low-content silver plating solution (silver nanoparticle content 30%-40%)

[0043] A method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment includes the following steps:

[0044] 1) Mix 30-40mg of silver metal powder, 35-45mg of carbon nanotube powder and 5-15mg of graphene oxide powder.

[0045] 2) After adding 392.75-785.5 mg of isopropanol to the product obtained in step 1), the product was transferred to a ball mill for ball milling.

[0046] 3) Place the product obtained in step 2) into an 80℃ oven for 8-10 hours for high-temperature drying.

[0047] 4) Place the product obtained in step 3) into a mortar and grind for 10-15 minutes until there is no obvious particle feel.

[0048] 5) Place the mixture obtained in step 4) into a ground glass bottle and add a magnetic stir bar. Add 0.5 mL of 20-25 mg / mL CMC solution and 1669.5 mg of ethylene glycol solution. Stir on a magnetic stirrer at 600 rpm for 8 hours, then sonicate in an 80% power ultrasonic cleaner for 0.5-1 hours to obtain the prepared silver plating solution.

[0049] Taking the product prepared in this embodiment as an example, when the content of silver nanoparticles in the three-dimensional framework network is 30%-40%, it has a low viscosity, which can be determined by the degree to which the liquid decreases over time. Figure 2 The graph showing the descent of a low-content silver plating solution (30%-40% silver nanoparticle content) over time (10 min, 1 h, 5 h) indicates that after the slurry was poured into the test tube and inverted, approximately 2 / 3 had flowed to the bottom after 10 min, approximately 4 / 5 had flowed to the bottom after 1 h, and after 5 h, except for a few trace droplets adhering to the test tube wall, the rest had completely flowed to the bottom, indicating its low viscosity. Furthermore, as... Figure 5 This indicates that after prolonged standing (24h × 7) of the low-silver-content plating solution, the slurry had completely flowed to the bottom of the test tube. It can be observed that the low viscosity due to the low silver nanoparticle content resulted in a higher total slurry volume compared to the medium and high silver-content solutions, even when other slurry components were kept at the same concentration. Comparing plating solutions with different silver nanoparticle contents, it was found that the low-silver-content solution decreased at a significantly higher rate over time than the medium and high-silver-content solutions. Furthermore, the images show that the solution maintained good dispersibility at these time points (10min, 1h, 5h), with no obvious stratification or agglomeration.

[0050] In this embodiment, a low-content silver plating solution is prepared and plated onto copper. The preparation method of the plating solution is as follows: silver metal powder is used as the main material, carbon nanotubes and graphene oxide powder are used as conductive agents, CMC solution is used as a binder, and ethylene glycol is used as a solvent. The mass ratio of the main material (zero-dimensional silver metal powder), conductive agent (one-dimensional carbon nanotubes + two-dimensional graphene oxide powder), binder (CMC), and solvent (ethylene glycol) is 3:6:1:0.5. After thoroughly mixing them in this ratio, the mixture is stirred and ultrasonicated to obtain the silver plating solution.

[0051] Taking the silver plating solutions with different concentrations prepared in this embodiment as examples of plating onto silver surfaces, they exhibit low concentrations and rapid dripping over time. They also demonstrate excellent plating adhesion, maintaining good morphology after drying without material lifting. They show good dispersibility and show no significant stratification or agglomeration even after prolonged storage. When plated onto copper foil, they effectively encapsulate the copper foil, enhancing its corrosion resistance.

[0052] The above demonstrates that by introducing one-dimensional carbon nanotubes and two-dimensional graphene oxide powder into the plating solution, which together with zero-dimensional silver nanoparticles form a three-dimensional framework network, the plating solution exhibits good dispersibility, ease of storage, and excellent adhesion. Furthermore, in plating solutions with varying silver concentrations and viscosities, it achieves characteristics such as low cost, good dispersibility, long-term storage without stratification, adjustable viscosity, strong adhesion after plating, good conductivity, and strong corrosion resistance. This overcomes the shortcomings of ordinary silver paste and significantly enhances the corrosion resistance of copper in carbon-fluorine based environmentally friendly insulating gas environments.

[0053] Example 2: Silver plating solution (silver nanoparticle content 40%-50%)

[0054] A method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment includes the following steps:

[0055] 1) Mix 40-50mg of silver metal powder, 35-45mg of carbon nanotube powder and 5-15mg of graphene oxide powder.

[0056] 2) After adding 392.75-785.5 mg of isopropanol to the product obtained in step 1), the product was transferred to a ball mill for ball milling.

[0057] 3) Place the product obtained in step 2) into an 80℃ oven for 8-10 hours for high-temperature drying.

[0058] 4) Place the product obtained in step 3) into a mortar and grind for 10-15 minutes until there is no obvious particle feel.

[0059] 5) Place the mixture obtained in step 4) into a ground glass bottle and add a magnetic stir bar. Add 0.5 mL of 20-25 mg / mL CMC solution and 1113 mg of ethylene glycol solution. Stir on a magnetic stirrer at 600 rpm for 8 hours, then sonicate in an 80% power ultrasonic cleaner for 0.5-1 hours to obtain the prepared silver plating solution.

[0060] Taking the product prepared in this embodiment as an example, when the content of silver nanoparticles in the three-dimensional framework network is 40%-50%, it has a medium viscosity, which can be determined by the degree to which the liquid decreases over time. Figure 3 The graph showing the decrease in concentration of medium-content silver plating solution (40%-50% silver nanoparticle content) over time (10 min, 1 h, 5 h) indicates that after the slurry was poured into the test tube and inverted, approximately 1 / 4 had flowed to the bottom after 10 min, approximately 3 / 4 after 1 h, and approximately 4 / 5 after 5 h. Some slurry still adhered to the top of the test tube, indicating its medium viscosity. Furthermore, as... Figure 6This indicates that after prolonged standing (24h × 7) of the medium-content silver plating solution, the slurry, except for a small amount of droplets adhering to the test tube wall, has completely flowed to the bottom. The moderate viscosity of the medium-content silver nanoparticles results in a relatively low total slurry volume under the same conditions of controlling other slurry component contents, while the high-content silver plating solution remains at a moderate level. Comparing plating solutions with different silver nanoparticle contents reveals that the medium-content silver plating solution decreases at a significantly higher rate over time than the high-content silver plating solution, but at a lower rate than the low-content silver plating solution. Furthermore, the images show that the solution maintains good dispersibility at these time points (10min, 1h, 5h), with no obvious stratification or aggregation.

[0061] In this embodiment, a medium-content silver plating solution is prepared and plated onto copper. The preparation method of the plating solution is as follows: silver metal powder is used as the main material, carbon nanotubes and graphene oxide powder are used as conductive agents, CMC solution is used as a binder, and ethylene glycol is used as a solvent. The mass ratio of the main material (zero-dimensional silver metal powder), conductive agent (one-dimensional carbon nanotubes + two-dimensional graphene oxide powder), binder (CMC), and solvent (ethylene glycol) is 5:4:1:0.5. After thoroughly mixing them in this ratio, the mixture is stirred and ultrasonicated to obtain the silver plating solution.

[0062] Taking the silver plating solutions of different concentrations prepared in this embodiment as examples for plating onto silver surfaces, they exhibit moderate concentrations and rapid dripping over time. They also demonstrate excellent plating adhesion, maintaining good morphology after drying without material lifting. They show good dispersibility and show no significant delamination or agglomeration even after prolonged storage. When plated onto copper foil surfaces, they effectively coat the copper foil, enhancing its corrosion resistance.

[0063] The above demonstrates that by introducing one-dimensional carbon nanotubes and two-dimensional graphene oxide powder into the plating solution, which together with zero-dimensional silver nanoparticles form a three-dimensional framework network, the plating solution exhibits good dispersibility, ease of storage, and excellent adhesion. Furthermore, in plating solutions with varying silver concentrations and viscosities, it achieves characteristics such as low cost, good dispersibility, long-term storage without stratification, adjustable viscosity, strong adhesion after plating, good conductivity, and strong corrosion resistance. This overcomes the shortcomings of ordinary silver paste and significantly enhances the corrosion resistance of copper in carbon-fluorine based environmentally friendly insulating gas environments.

[0064] Example 3: High-content silver plating solution (silver nanoparticle content 60%-90%)

[0065] A method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment includes the following steps:

[0066] 1) Mix 60-90mg of silver metal powder, 35-45mg of carbon nanotube powder and 5-15mg of graphene oxide powder.

[0067] 2) After adding 392.75-785.5 mg of isopropanol to the product obtained in step 1), the product was transferred to a ball mill for ball milling.

[0068] 3) Place the product obtained in step 2) into an 80℃ oven for 8-10 hours for high-temperature drying.

[0069] 4) Place the product obtained in step 3) into a mortar and grind for 10-15 minutes until there is no obvious particle feel.

[0070] 5) Place the mixture obtained in step 4) into a ground glass bottle and add a magnetic stir bar. Add 0.5 mL of 20-25 mg / mL CMC solution and 556.5 mg of ethylene glycol solution. Stir on a magnetic stirrer at 600 rpm for 8 hours, then sonicate in an 80% power ultrasonic cleaner for 0.5-1 hours to obtain the prepared silver plating solution.

[0071] Taking the product prepared in this embodiment as an example, when the content of silver nanoparticles in the three-dimensional framework network is 60%-90%, it has a high viscosity, which can be determined by the degree to which the liquid decreases over time. Figure 4 The graphs showing the descent of a high-content silver plating solution (60%-90% silver nanoparticle content) over time (10 min, 1 h, 5 h) indicate that after the slurry was poured into the test tube and inverted, it remained concentrated at the top of the tube after 10 min. After 1 h, only a small amount (about 1 / 10) of the slurry had flowed to the bottom. After 5 h, about 1 / 2 had flowed to the bottom, but a large amount of slurry still adhered to the top of the test tube, indicating its high viscosity. Furthermore, as... Figure 7 This indicates that after prolonged standing (24h × 7) of the medium-content silver plating solution, the slurry, except for a small amount of droplets adhering to the test tube wall, had completely flowed to the bottom. It can be observed that the high viscosity of the high-silver-nanoparticle content resulted in a lower total slurry volume and less medium-content silver plating solution under the same conditions of controlling other slurry component contents. By comparing plating solutions with different silver nanoparticle contents, it can be found that the high-content silver plating solution decreased at a significantly lower rate over time than the low-content and medium-content silver plating solutions. Furthermore, the images show that the solution maintained good dispersibility at these time points (10min, 1h, 5h), with no obvious stratification or aggregation.

[0072] In this embodiment, a high-content silver plating solution was prepared and plated onto copper. The preparation method of the plating solution is as follows: silver metal powder is used as the main material, carbon nanotubes and graphene oxide powder are used as conductive agents, CMC solution is used as a binder, and ethylene glycol is used as a solvent. The mass ratio of the main material (zero-dimensional silver metal powder), conductive agent (one-dimensional carbon nanotubes + two-dimensional graphene oxide powder), binder (CMC), and solvent (ethylene glycol) is 8:1:1:0.5. After thoroughly mixing them in this ratio, the mixture is stirred and ultrasonicated to obtain the silver plating solution. Taking the silver plating solutions with different contents prepared in this embodiment as examples of plating onto silver surfaces, they have a high concentration and a fast drip rate over time. They also have excellent plating adhesion, maintain a good morphology after drying, and do not exhibit material lifting or other phenomena. They have good dispersibility and do not show obvious delamination or agglomeration even after long-term storage. After being plated onto the copper foil surface, they can also effectively coat the copper foil, thereby improving its corrosion resistance.

[0073] The above indicates that by introducing one-dimensional carbon nanotubes and two-dimensional graphene oxide powder into the plating solution, together with zero-dimensional silver nanoparticles to form a three-dimensional framework network, the plating solution exhibits good dispersibility, ease of storage, and good adhesion. Furthermore, in plating solutions with different silver concentrations and viscosities, it can achieve characteristics such as low cost, good dispersibility, long-term storage without stratification, adjustable viscosity, strong adhesion after plating, good conductivity, and strong corrosion resistance. This improves upon the shortcomings of ordinary silver paste and can significantly enhance the corrosion resistance of copper in carbon-fluorine environmentally friendly insulating gas environments.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for preparing a plating solution that improves the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment, comprising the following steps: Step 1) Mix silver metal powder, carbon nanotube powder and graphene oxide powder in a certain proportion; Step 2) After adding isopropanol to the product obtained in Step 1), transfer it to a ball mill for ball milling; Step 3) Place the product obtained in step 2) into an oven for a certain period of time to dry at high temperature; Step 4) Place the product obtained in step 3) into a mortar and grind it until there is no obvious grainy texture; Step 5) Place the mixture obtained in Step 4) into a ground glass bottle and add a magnetic stir bar, binder and a certain amount of ethylene glycol solution, place it on a magnetic stirrer and stir. After mixing and stirring for a certain period of time, perform ultrasound to obtain the prepared silver plating solution.

2. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: In step 1), the amount of silver metal powder used is 30-60 mg, the amount of carbon nanotube powder used is 35-45 mg, the amount of graphene oxide powder used is 5-15 mg, and the amount of isopropanol used in step 2) is 392.75-785.5 mg.

3. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: In step 2), the ball mill speed is 300-450 r / min, and the grinding time is 5-8 h.

4. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: In step 3), the oven temperature is 80℃ and the drying time is 8-10 hours.

5. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: The grinding time in step 4) is 10-15 minutes.

6. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: The adhesive mentioned in step 5) is a CMC solution or a PVDF solution.

7. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: In step 5), CMC solution is used as a binder with a concentration of 20-25 mg / mL and a dosage of 0.5 mL, while ethylene glycol is used in a dosage of 556.5-1669.5 mg.

8. The method for preparing the plating solution for improving the compatibility of metals with environmentally friendly alternative gases in gas-insulated equipment according to claim 1, characterized in that: In step 5), the magnetic stirrer rotates at 600 r / min and the stirring time is 8-10 h. An ultrasonic cleaner is used for ultrasonic cleaning, with the power of the ultrasonic cleaner set to 80% and the ultrasonic cleaning time being 0.5-1 h.

9. A plating solution prepared according to any one of claims 1-8.

10. A plating solution prepared by any one of the preparation methods in claims 1-8 is used as a silver plating solution to plate a copper surface, for the purpose of protecting copper metal materials from corrosion by carbon-fluorine environmentally friendly insulating gases.

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