Electric rust removal electrolyte and rust removal method

Abstract

The invention belongs to the technical field of metal surface treatment, and discloses an electric rust removal electrolyte which comprises the following components: sodium sulfate, potassium sulfate and a corrosion inhibitor. The sodium sulfate electrolyte and the potassium sulfate additive are adopted, and the efficient and environment-friendly electrolytic rust removal process is achieved. And under the electrolysis action, the rust on the metal surface can be quickly and thoroughly removed, and the natural color and luster of the metal are recovered. The addition of additives such as potassium sulfate is beneficial to improving the conductivity of the electrolyte, so that the cost is reduced and the efficiency is improved. The method is easy to operate, low in cost and suitable for rust removal treatment of various metal materials.

Description

Technical Field

[0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to an electrorust removal electrolyte and a rust removal method. Background Art

[0002] Traditional rust removal methods include mechanical and chemical rust removal. While these methods can remove rust from metal surfaces to a certain extent, they often suffer from drawbacks such as low efficiency, significant environmental pollution, and damage to the metal substrate. Electrochemical rust removal, as an emerging rust removal technology, offers advantages such as rapid rust removal and minimal damage to the substrate.

[0003] Electrochemical rust removal is a technology that uses an electrolyte and electric current to remove rust from metal surfaces. Traditional electrolytes often use sodium chloride or sodium sulfate, but these electrolytes alone may not be conductive enough and may not be effective enough for rust removal.

[0004] Through the above analysis, the problems and defects of the existing technology are as follows:

[0005] Conventional electrolytes often use sodium chloride or sodium sulfate, but when these electrolytes are used alone, the conductivity and rust removal effects may be insufficient. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present invention provides an electrolytic rust removal electrolyte.

[0007] The present invention is achieved in that an electro-rust removal electrolyte comprises the following components:

[0008] Sodium sulfate, potassium sulfate, corrosion inhibitor.

[0009] Furthermore, the sodium sulfate Na2SO4 has a purity of more than 99% and serves as the main electrolyte.

[0010] Furthermore, the amount of potassium sulfate K2SO4 added as an auxiliary additive can be adjusted according to specific rust removal requirements, and the weight ratio of potassium sulfate to sodium sulfate is usually controlled between 1:1 and 1:20.

[0011] Furthermore, the corrosion inhibitor may be added with other inorganic or organic acids and salts in appropriate amounts, including citric acid and tartaric acid.

[0012] Another object of the present invention is to provide a method for preparing an electrolyte:

[0013] Step 1: Mix the calculated sodium sulfate and potassium sulfate, as well as other optional components, in proportion;

[0014] Step 2: Add an appropriate amount of deionized water and stir until completely dissolved to obtain the desired electrolyte.

[0015] Another object of the present invention is to provide a method for removing rust with an electrolytic solution, comprising:

[0016] (1) Place the metal substrate to be derusted into the electrolytic cell to ensure that the metal substrate is in full contact with the electrolyte;

[0017] (2) Apply power for electrolytic rust removal, with the voltage controlled between 3V and 20V, which is adjusted appropriately according to the degree of corrosion of the metal substrate and the concentration of the electrolyte;

[0018] (3) During the electrolysis process, sodium sulfate and potassium sulfate act as electrolytes to provide conductivity, and work together with other additives to accelerate the dissolution and peeling of rust and form a protective film on the metal surface;

[0019] (4) The electrolysis time depends on the degree of rust. Generally, rust removal and cleaning can be completed in a few minutes to tens of minutes.

[0020] (5) After the electrolysis is completed, remove the metal substrate and rinse the electrolyte residue on the surface with clean water; subsequent treatments such as drying and polishing can be performed as needed to further improve the smoothness and aesthetics of the metal surface.

[0021] Another object of the present invention is to provide an electrolyte preparation system for implementing the electrolyte preparation method according to any one of claim 15, characterized in that the electrolyte preparation system comprises:

[0022] The mixing module is used to mix the calculated sodium sulfate and potassium sulfate, as well as other optional components, in proportion;

[0023] The dissolution module is used to add an appropriate amount of deionized water and stir until it is completely dissolved to obtain the required electrolyte.

[0024] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0025] First, the present invention utilizes a sodium sulfate electrolyte and potassium sulfate additive to achieve an efficient and environmentally friendly electrolytic rust removal process. Through electrolysis, rust can be quickly and thoroughly removed from metal surfaces, restoring the metal's natural color and luster. The addition of additives such as potassium sulfate helps improve the electrolyte's conductivity, thereby reducing costs and increasing efficiency. This method is simple to operate, low-cost, and suitable for rust removal on a variety of metal materials.

[0026] Second, the electrolytic rust removal electrolyte technical solution of the present invention effectively solves many problems of the prior art in industrial applications and achieves significant technological progress.

[0027] First of all, traditional mechanical and chemical rust removal methods often have problems such as low efficiency, great damage to the substrate, and serious environmental pollution. Although mechanical rust removal is effective, it is difficult to completely remove the rust layer on metal parts with complex structures; chemical rust removal will bring about the problem of waste liquid treatment after pickling, which is easy to pollute the environment and poses a potential risk to the health of operators. The present invention designs an electrorust removal electrolyte based on a combination of sodium sulfate, potassium sulfate and corrosion inhibitors, combined with electrochemical reactions, which can quickly and evenly remove the rust layer on the metal surface, while protecting the metal substrate, avoiding the physical damage of mechanical rust removal and the environmental hazards of chemical rust removal.

[0028] Secondly, the electrolyte used in this invention contains a corrosion inhibitor, which effectively prevents further corrosion of the metal surface during the electrolysis process, greatly improving treatment accuracy and safety. The efficient operation of the electrolyte under the action of electric current not only significantly shortens rust removal time but also comprehensively cleans metal surfaces and crevices with complex geometries, enhancing rust removal effectiveness. This method is particularly suitable for large steel structures, mechanical components, ships, and other fields.

[0029] Therefore, in industrial applications, the technical solution of the present invention significantly improves the rust removal efficiency, reduces environmental pollution, and reduces substrate damage during the rust removal process. At the same time, through the action of the corrosion inhibitor, the life of the metal surface is extended, the overall optimization of the technical performance is achieved, and significant technological progress is achieved.

[0030] Third, the expected benefits and commercial value of the technical solution of the present invention after transformation are: reducing the power loss caused by low conductivity, reducing the power consumption during the electric rust removal process, and achieving cost reduction, efficiency improvement, energy conservation and emission reduction.

[0031] Does the technical solution of the present invention solve the technical problems that people have always wanted to solve but have never been able to solve: solving the problem of high electricity consumption and high operating costs in the traditional electrochemical cleaning process?

[0032] The electro-rust removal electrolyte formula provided by the present invention solves the problems of low efficiency, serious environmental pollution, and excessive corrosion of metal substrates in traditional rust removal methods by rationally combining sodium sulfate, potassium sulfate, and corrosion inhibitors, and represents a significant technological advancement, which is specifically reflected in the following aspects:

[0033] 1. Improve rust removal efficiency

[0034] Traditional chemical rust removal methods typically require long soaking times and are difficult to control. The electrolyte of the present invention significantly improves rust removal speed through electro-rust removal technology, particularly removing both mild and severe rust in a shorter time. This highly efficient rust removal method can save production time and reduce process costs, making it suitable for large-scale, rapid rust removal applications.

[0035] 2. Reduce damage to the metal substrate

[0036] The present invention incorporates corrosion inhibitors, such as citric acid and tartaric acid, to effectively prevent excessive corrosion of the metal substrate during the electrolysis process, ensuring a smooth surface finish while maintaining the original strength. While acidic corrosion, common in traditional rust removal methods, can easily cause irreversible damage to metals, the electrolyte solution of the present invention prevents excessive corrosion during the rust removal process, thereby extending the service life of metal workpieces.

[0037] 3. Reduce environmental pollution

[0038] Traditional chemical rust removers contain large amounts of acidic or heavy metal components, resulting in significant environmental pollution and complex wastewater treatment. The electrolyte formulation of the present invention utilizes environmentally friendly electrolytes such as sodium sulfate and potassium sulfate, along with an organic acid corrosion inhibitor. No harmful gases are released during the rust removal process, significantly improving the electrolyte's environmental performance and reducing the cost and difficulty of wastewater treatment, thus meeting the requirements of green manufacturing.

[0039] 4. Wide applicability and adjustability

[0040] The electrolyte formulation of this invention allows for the ratio of potassium sulfate to sodium sulfate to be adjusted according to the severity of corrosion, thereby meeting the different treatment requirements for lightly and heavily corroded metals. This flexibility solves the existing problem of requiring multiple rust removers depending on the severity of corrosion, providing a highly adaptable solution for industrial production and significantly simplifying the process flow.

[0041] In summary, the present invention has achieved technological breakthroughs in rust removal efficiency, environmental protection, substrate protection and applicability, providing an efficient, green and safe solution for the field of industrial rust removal, and greatly improving the convenience and economic benefits of industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The present invention provides a flow chart of a method for preparing an electrolytic rust removal electrolyte.

[0043] Figure 2 The present invention provides an embodiment of the present invention provides an electrolytic rust removal method.

[0044] Figure 3 This is a structural block diagram of an electrolytic rust removal electrolyte preparation system provided by an embodiment of the present invention.

[0045] Figure 4 At 25A / dm 2 A comparison chart of the effects of using 20% ​​sodium sulfate electrolyte and a mixed electrolyte of 10% sodium sulfate and 10% potassium sulfate for the same treatment time at a current density of .

[0046] Figure 5 This is a comparison chart of the conductivity of the electrolytes prepared in Comparative Examples 1 to 3 and Examples 1 to 4.

[0047] Figure 6 Schematic diagram of the electrolytic rust removal electrolyte provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] An electrolytic rust removal electrolyte provided by an embodiment of the present invention includes the following components:

[0050] Sodium sulfate, potassium sulfate, corrosion inhibitor.

[0051] The sodium sulfate Na2SO4 provided in the embodiment of the present invention has a purity of more than 99% and is used as the main electrolyte.

[0052] The potassium sulfate K2SO4 provided in the embodiment of the present invention is used as an auxiliary additive, and its addition amount can be adjusted according to the specific rust removal requirements. The weight ratio of potassium sulfate to sodium sulfate is usually controlled between 1:1 and 1:20.

[0053] The corrosion inhibitor provided by the embodiment of the present invention can be added with other inorganic or organic acids and salts in appropriate amounts, including citric acid and tartaric acid.

[0054] Example 1: Electrolyte for lightly corroded metal surfaces

[0055] 1. Electrolyte formula

[0056] Sodium sulfate (Na2SO4): 60 g (purity above 99%)

[0057] Potassium sulfate (K2SO4): 3 g (as an auxiliary additive, the weight ratio with sodium sulfate is 1:20)

[0058] Corrosion inhibitor: 2g citric acid

[0059] This formula is suitable for lightly corroded metal surfaces, especially some thin rust layers that do not require stronger rust removal effects.

[0060] 2. Usage steps

[0061] Sodium sulfate, potassium sulfate and citric acid were dissolved in 1000 ml of deionized water respectively, and stirred evenly until completely dissolved to obtain a uniform electrolyte.

[0062] Immerse the rusted metal parts to be treated in the electrolyte and apply a low current density direct current, the current density is controlled at 0.1A / cm2 About 10 minutes of electrolysis.

[0063] After electrolysis, remove the metal parts and gently wipe the surface to remove the thin layer of rust.

[0064] 3. Effect verification

[0065] After electrolytic treatment, the surface rust of metal parts is significantly reduced, the surface is smooth and the metallic luster is maintained. The addition of citric acid effectively prevents excessive metal corrosion and improves the rust removal effect.

[0066] Example 2: Electrolyte for Severely Corroded Metal Surfaces

[0067] 1. Electrolyte formula

[0068] Sodium sulfate (Na2SO4): 80g (purity above 99%)

[0069] Potassium sulfate (K2SO4): 20 g (as an auxiliary additive, the weight ratio with sodium sulfate is 1:4)

[0070] Corrosion inhibitor: 5g tartaric acid

[0071] This formula is suitable for heavily corroded metal surfaces, providing enhanced rust removal.

[0072] 2. Usage steps

[0073] Sodium sulfate, potassium sulfate and tartaric acid were dissolved in 1000 ml of deionized water respectively, and stirred evenly until completely dissolved to obtain a high-concentration electrolyte.

[0074] Immerse the heavily corroded metal parts to be treated in the electrolyte and apply a high current density direct current, the current density is controlled at 0.3A / cm 2 , electrolysis for 20 minutes.

[0075] After electrolysis, remove the metal parts, remove the loose rust with a soft brush, rinse with clean water, and finally air dry naturally.

[0076] 3. Effect verification

[0077] After electrolysis treatment, the rust on the metal parts is basically removed. The corrosion inhibition effect of tartaric acid prevents excessive corrosion of the metal body during the electrolysis process, making the metal surface smooth and undamaged.

[0078] like Figure 1 As shown, an embodiment of the present invention provides a method for preparing an electrolyte:

[0079] S101, mixing the calculated sodium sulfate and potassium sulfate, and other optional components in proportion;

[0080] S102, add an appropriate amount of deionized water and stir until completely dissolved to obtain the desired electrolyte.

[0081] like Figure 2 As shown, an embodiment of the present invention provides an electrolytic rust removal method comprising:

[0082] S201, placing the metal substrate to be derusted into the electrolytic cell to ensure that the metal substrate is in full contact with the electrolyte;

[0083] S202, applying power to perform electrolytic derusting, with the voltage controlled between 3V and 20V, which is adjusted appropriately according to the degree of corrosion of the metal substrate and the concentration of the electrolyte;

[0084] S203, during the electrolysis process, sodium sulfate and potassium sulfate act as electrolytes to provide conductivity, and work together with other additives to accelerate the dissolution and peeling of rust and form a protective film on the metal surface;

[0085] S204, the electrolysis time depends on the degree of rust, and generally takes several minutes to several tens of minutes to complete rust removal and cleaning;

[0086] S205, after the electrolysis is completed, the metal substrate is removed and the electrolyte residue on the surface is rinsed with clean water; subsequent treatments such as drying and polishing can be performed as needed to further improve the smoothness and aesthetics of the metal surface.

[0087] The electrolyte preparation method and electrolytic rust removal method of the embodiments of the present invention are intended to improve rust removal efficiency and protect the metal substrate through the rational configuration of electrolytes and additives. First, when preparing the electrolyte, the calculated sodium sulfate and potassium sulfate are mixed in a specific ratio, an appropriate amount of deionized water is added and stirred until completely dissolved, thereby forming a uniform electrolyte. Sodium sulfate, as the main electrolyte, provides a high-purity ionic environment to ensure good conductivity, while potassium sulfate, as an auxiliary additive, can adjust the performance of the electrolyte to meet different rust removal requirements.

[0088] During rust removal, the metal substrate to be cleaned is placed in an electrolytic cell, ensuring full contact with the electrolyte. After power is applied, the voltage is generally controlled between 3V and 20V, and can be adjusted appropriately depending on the degree of rust and the concentration of the electrolyte. When power is applied, the ions in the sodium sulfate and potassium sulfate in the electrolytic cell create a conductive effect, evenly distributing the current across the metal surface. This uniform current distribution helps evenly remove rust and prevents excessive damage to the metal substrate surface.

[0089] During the electrolytic derusting process, the sodium sulfate and potassium sulfate in the electrolyte work synergistically to accelerate the dissolution and removal of rust. As the rust is gradually removed, the corrosion inhibitor added to the electrolyte forms a protective film on the metal surface, preventing further oxidation. This corrosion-resistant protective film effectively protects the metal surface from secondary corrosion, making the metal substrate more durable after electrolytic derusting.

[0090] After electrolysis is complete, the metal substrate is removed from the electrolytic cell and any residual electrolyte residue is rinsed with clean water to prevent it from damaging the metal. The metal surface can then be dried and polished as needed to further enhance its finish and aesthetics. This highly efficient and environmentally friendly process not only improves rust removal effectiveness compared to traditional rust removal methods, but also reduces damage to the metal substrate and environmental pollution.

[0091] like Figure 3 As shown, an electrolyte preparation system provided by an embodiment of the present invention includes:

[0092] The mixing module is used to mix the calculated sodium sulfate and potassium sulfate, as well as other optional components, in proportion;

[0093] The dissolution module is used to add an appropriate amount of deionized water and stir until it is completely dissolved to obtain the required electrolyte.

[0094] The present invention is specifically implemented:

[0095] In view of the existing problems, the present invention provides an electro-rust removal method using sodium sulfate electrolyte and potassium sulfate as additives. The specific implementation process is as follows:

[0096] According to one aspect of an embodiment of the present invention, the amount of sodium sulfate added in the electrolyte preparation is 10 wt % to 20 wt %, and the amount of potassium sulfate added is 1 wt % to 10 wt %.

[0097] <Example 1>

[0098] Electrolyte composition: 19 wt% sodium sulfate and 1 wt% potassium sulfate.

[0099] step:

[0100] 1. Mix 190 g of sodium sulfate and 10 g of potassium sulfate, add 1 liter of deionized water, and stir until completely dissolved to obtain an electrolyte.

[0101] 2. Place the stainless steel product to be derusted into the electrolytic tank to ensure that the stainless steel product is in full contact with the electrolyte.

[0102] 3. Connect the electrolytic cell to the DC power supply, set the voltage and current, and start electrolytic rust removal

[0103] 4. After electrolysis for a certain period of time, it is observed that the rust on the surface gradually dissolves and peels off.

[0104] 5. After the electrolysis is completed, take out the stainless steel products, rinse them with clean water, and dry them in the air or by blowing them dry.

[0105] <Example 2>

[0106] The steps of this embodiment are basically the same as those of Example 1, except that the electrolyte composition is 17 wt % sodium sulfate and 3 wt % potassium sulfate, and in step 1, 170 g sodium sulfate and 30 g potassium sulfate are added.

[0107] <Example 3>

[0108] The steps of this embodiment are basically the same as those of Example 1, except that the electrolyte composition is 15 wt % sodium sulfate and 5 wt % potassium sulfate, and in step 1, 150 g sodium sulfate and 50 g potassium sulfate are added.

[0109] <Example 4>

[0110] The steps of this embodiment are basically the same as those of Example 1, except that the electrolyte composition is 10 wt % sodium sulfate and 10 wt % potassium sulfate, and in step 1, 100 g of sodium sulfate and 100 g of potassium sulfate are added.

[0111] Comparative Example 1

[0112] The steps of this comparative example are basically the same as those of Example 1, except that the electrolyte composition is 20 wt % sodium sulfate, and in step 1, only 200 g of sodium sulfate is added.

[0113] Comparative Example 2

[0114] The steps of this comparative example are basically the same as those of Example 1, except that the electrolyte composition is 10 wt % sodium sulfate, and in step 1, only 100 g of sodium sulfate is added.

[0115] Comparative Example 3

[0116] The steps of this comparative example are basically the same as those of Example 1, except that the electrolyte composition is 10 wt % potassium sulfate, and in step 1, only 100 g of potassium sulfate is added.

[0117] <Electrorust removal performance test>

[0118] Electrolytic derusting performance was tested for the electrolytes prepared in Examples 1-4 and Comparative Examples 1-3. The stainless steel article to be derusted was placed in an electrolytic cell, ensuring full contact between the stainless steel article and the electrolyte. The cell was then connected to a DC power supply, the voltage and current were set, and derusting was initiated. The time required for complete removal of the oxide scale from the stainless steel surface, revealing a smooth metal surface, was recorded. The amount of rust removed per unit of electricity was then calculated to evaluate the derusting performance. The results are shown in Table 1.

[0119] Table 1

[0120]

[0121] As can be seen from Table 1, the conductivity and rust removal per unit electricity of the electrolytes prepared in Examples 1 to 4 are higher than those in Comparative Examples 1 to 3, indicating that the utilization rate of electricity for electrolytic rust removal using the electrolytes prepared in Examples 1 to 4 is higher; the time required for rust removal by the electrolytes prepared in Examples 1 to 4 is short, indicating that the electrolytic rust removal performance of the electrolytes prepared in Examples 1 to 4 is better.

[0122] The above test results show that potassium sulfate has a higher electrical conductivity than sodium sulfate. Adding a certain amount of potassium sulfate to the sodium sulfate electrolyte can improve the conductivity of the electrolyte, reduce the electrical loss caused by the conversion of electrical energy into thermal energy, and improve the efficiency of electric rust removal, thereby achieving cost reduction and efficiency improvement.

[0123] Example 1: Rust removal of metal component surfaces

[0124] In the maintenance of large-scale mechanical equipment, metal components with rust on the surface are often encountered. Traditional mechanical rust removal methods are time-consuming and labor-intensive, while the use of electrostatic rust removal electrolyte can complete the rust removal work more efficiently. In specific implementation, the metal components that need to be rusted are immersed in the electrostatic rust removal electrolyte, and an appropriate current is applied. The electrolyte is composed of sodium sulfate (15%), potassium sulfate (5%), corrosion inhibitor (such as citric acid, 1%) and deionized water (79%). Under the action of current, the movement of ions in the electrolyte accelerates the shedding of the rust layer, and the corrosion inhibitor can protect the substrate and prevent excessive corrosion. This process is usually carried out at room temperature for 30-60 minutes. After rust removal, the metal surface is smooth and clean, and its original luster is restored.

[0125] Example 2: Rust removal of steel structures during ship maintenance

[0126] During regular maintenance of ships, hull steel plates are often exposed to seawater and are prone to rust. Electrostatic rust removal technology uses electrostatic rust removal electrolyte to treat the surface of the hull, which can quickly remove the rust layer without affecting the performance of the steel. The electrolyte is composed of sodium sulfate (20%), potassium sulfate (10%), corrosion inhibitor (such as tartaric acid, 1.5%) and deionized water (68.5%). By applying an appropriate current, the rust on the rusted steel plate can be removed in a short time, the surface of the steel plate is effectively protected, and the corrosion inhibitor effectively prevents secondary corrosion during the rust removal process. This method greatly improves the efficiency of ship maintenance and reduces the use of chemical agents.

[0127] At 25A / dm 2 The effect of using 20% ​​sodium sulfate electrolyte and 10% sodium sulfate and potassium sulfate mixed electrolyte for the same treatment time at a current density of Figure 4 From this comparison, it can be seen that when the electrolyte of this practical example is used to clean hot-rolled stainless steel, the power consumption is low and the cleaning effect is good, which can achieve cost reduction and efficiency improvement.

[0128] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. An electrolytic rust removal electrolyte, characterized in that: The electro-rust removal electrolyte comprises the following components: Sodium sulfate, potassium sulfate, and corrosion inhibitor, wherein the purity of sodium sulfate is above 99%.

2. The electrolytic rust removal electrolyte according to claim 1, characterized in that: The sodium sulfate is used as a main electrolyte, and its weight proportion is 10% to 30%.

3. The electrolytic rust removal electrolyte according to claim 1, characterized in that: The potassium sulfate is used as an auxiliary additive, and the added amount is 5% to 50% of the weight of the sodium sulfate, and the specific ratio range is the weight ratio of sodium sulfate to potassium sulfate of 1:1 to 1:

20.

4. The electrolytic rust removal electrolyte according to claim 1, characterized in that: The amount of the corrosion inhibitor added is 0.1% to 2% of the total weight of the electrolyte, and the corrosion inhibitor includes one or both of citric acid and tartaric acid.

5. The electrolytic rust removal electrolyte according to claim 1, characterized in that: The electrolyte may also be added with an appropriate amount of deionized water as a solvent as required, and the overall composition ratio of the electrolyte is controlled at 10% to 30% electrolyte, 5% to 15% corrosion inhibitor, and 55% to 85% deionized water.

6. A method for preparing an electro-rust removal electrolyte for implementing the electro-rust removal electrolyte according to any one of claim 15, characterized in that: The electrolyte preparation method: Step 1, mix the calculated sodium sulfate and potassium sulfate, as well as other optional components, in proportion; Step 2, add an appropriate amount of deionized water and stir until completely dissolved to obtain the desired electrolyte.

7. A method for removing rust using the electrolytic rust removal electrolyte according to any one of claim 15, characterized in that: The electro-rust removal electrolyte rust removal method comprises: (1) Place the metal substrate to be derusted into the electrolytic cell to ensure that the metal substrate is in full contact with the electrolyte; (2) Power on for electrolytic rust removal, with the voltage controlled between 3V and 20V, which is adjusted appropriately according to the degree of corrosion of the metal substrate and the concentration of the electrolyte; (3) During the electrolysis process, sodium sulfate and potassium sulfate act as electrolytes to provide conductivity, and work together with other additives to accelerate the dissolution and peeling of rust and form a protective film on the metal surface; (4) The electrolysis time depends on the degree of rust. Generally, rust removal and cleaning can be completed in a few minutes to tens of minutes. (5) After the electrolysis is completed, remove the metal substrate and rinse the electrolyte residue on the surface with clean water; drying and polishing can be performed as needed to further improve the smoothness and aesthetics of the metal surface.

8. An electrolyte preparation system for implementing the electrolyte preparation method according to any one of claim 15, characterized in that: The electrolyte preparation system comprises: A mixing module is used to mix the calculated sodium sulfate and potassium sulfate, as well as other optional components, in a uniform proportion; The dissolution module is used to add an appropriate amount of deionized water and stir until it is completely dissolved to obtain the required electrolyte.

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