Preparation method and application of tin-doped stability-enhanced lead dioxide electrode

Abstract

The invention belongs to the technical field of electrochemical rust removal, and discloses a preparation method and application of a tin-doped stability-enhanced lead dioxide electrode. According to the preparation method, the tin element is introduced into the electrodeposition liquid, and the modified lead dioxide electrode with high stability and high conductivity is obtained by effectively regulating and controlling the preparation conditions. The introduction of the tin element enables the surface of the electrode to be more compact, uniform and smooth, and the conductivity and stability of the electrode are effectively improved; the cathode material is suitable for electrochemical rust removal. The invention provides a method for using tin-doped lead dioxide as a cathode material in an electric rust removal process. According to the method, by optimizing cathode material selection, the electric rust removal efficiency is remarkably improved, and the service life of the electrode is prolonged. Compared with a traditional graphite cathode, the tin-doped lead dioxide cathode can better resist corrosion and maintain stable performance under high current density. According to the embodiment of the invention, the excellent performance of the tin-doped lead dioxide cathode in the electric rust removal process is shown.

Description

Technical Field

[0001] The invention belongs to the technical field of electrochemical rust removal, and in particular relates to a preparation method and application of a tin-doped lead dioxide electrode with enhanced stability. Background Art

[0002] As an important structural material, steel has been widely used due to its good comprehensive performance and low price. However, steel is lost in large quantities every year due to corrosion such as chemical corrosion and electrochemical corrosion. The mechanical properties of steel deteriorate during use, which not only causes huge economic losses, but also brings great safety hazards. Therefore, steel rust removal is of great significance. Graphite is often used as the cathode material in traditional electro-rust removal technology. However, the graphite cathode is prone to corrosion and deformation during long-term electrolysis, thereby reducing the rust removal efficiency and shortening the electrode life. In order to solve this problem, the present invention proposes to use tin-doped lead dioxide as the cathode material, utilizing its excellent conductivity, corrosion resistance and stability to significantly improve the effect of the electro-rust removal process.

[0003] The key to electrochemical rust removal lies in the electrode material. Ti / PbO2 electrode has been widely used due to its advantages such as simple preparation, good chemical stability, high oxygen evolution potential, good conductivity and low cost. However, in the process of electrodeposition of the active layer of lead dioxide on the electrode with titanium plate as the substrate, the titanium plate is prone to passivation and generates TiO2, which hinders the subsequent deposition of lead dioxide deposits, causing the active layer of lead dioxide to fall off from the substrate, and the service life of the electrode is sharply shortened. Domestic and foreign scholars have conducted a lot of research on improving the electrochemical properties of Ti / PbO2 electrodes. Many studies have reduced the interface resistance, improved the bonding strength between lead dioxide and titanium substrate, and increased the service life by doping and modifying the active layer of lead dioxide (rare earth metal element ions represented by cerium / lanthanum / bismuth, particle doping and modification represented by cerium oxide particles / polytetrafluoroethylene particles, and surfactant modification represented by sodium dodecylbenzene sulfonate / sodium dodecyl sulfate).

[0004] Although the stability and conductivity of the modified cathode have been improved to a certain extent, they are still not ideal in the actual application of treating steel with a large degree of corrosion, and their cathode stability and conductivity still need to be further improved. Therefore, more improvement research is needed to prepare cathode materials with both excellent stability and conductivity.

[0005] Through the above analysis, the problems and defects of the prior art are as follows:

[0006] It is still not ideal in practical application of treating steel with a high degree of corrosion. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a preparation method and application of a tin-doped lead dioxide electrode with enhanced stability.

[0008] The present invention is achieved by: a method for preparing a tin-doped lead dioxide electrode with enhanced stability comprising:

[0009] Step 1, dissolving a lead source, a tin source and a sulfonic acid source in water to prepare a solution;

[0010] Step 2, adding a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution;

[0011] Step 3: Electrodepositing the titanium-based anode in the electroplating solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

[0012] Furthermore, the tin-doped lead dioxide electrode with enhanced stability comprises:

[0013] A titanium-based core layer and a tin-doped lead dioxide surface active layer deposited on the surface of the titanium-based core layer.

[0014] Furthermore, the thickness ratio of the titanium-based core layer to the tin-doped lead dioxide surface active layer is 1:(2-5); preferably 1:(3.5-4.5).

[0015] Furthermore, in the tin-doped lead dioxide surface active layer, the mass ratio of tin to lead dioxide is 1:(20-400); preferably, the mass ratio of tin to lead dioxide is 1:(50-300).

[0016] Further, the conditions of the electrodeposition treatment are: current density 5-15 mA / cm2, temperature 15-25°C, plate spacing 2-3.5 cm, deposition time 30-120 min;

[0017] The electrodeposition solution should at least include: a lead source, a tin source, and a sulfonic acid source;

[0018] The lead source is one or more of lead nitrate and lead methanesulfonate;

[0019] The tin source is one or more of tin methanesulfonate and [SnF6]2-;

[0020] The sulfonic acid source is one or more of methanesulfonic acid, ethylsulfonic acid, and trifluoromethanesulfonic acid;

[0021] The electrodeposition solution should also include a fluorine source and a surfactant;

[0022] The fluoride source is one or more of potassium fluoride, sodium fluoride and ammonium fluoride;

[0023] The surfactant is one or more of sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium butylnaphthalene sulfonate;

[0024] The pH of the electrodeposition solution is 0.3 to 1.5;

[0025] The molar concentration of the lead source in the electrodeposition solution is 0.05 to 0.15 mol / L;

[0026] The molar concentration of the tin source in the electrodeposition solution is 0.005 to 0.015 mol / L;

[0027] The molar concentration of the sulfonic acid source in the electrodeposition solution is 0.08 to 0.13 mol / L.

[0028] Another object of the present invention is to provide a tin-doped lead dioxide electrode with enhanced stability for use in electrochemical rust removal.

[0029] Another object of the present invention is to provide a system for preparing a tin-doped lead dioxide electrode with enhanced stability, comprising:

[0030] A dissolving module is used to dissolve a lead source, a tin source, and a sulfonic acid source in water to prepare a solution; and to add a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution;

[0031] The electroplating treatment module is used for electroplating the titanium-based anode in the electroplating solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

[0032] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for preparing the tin-doped lead dioxide electrode with enhanced stability.

[0033] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to perform the steps of the method for preparing the tin-doped lead dioxide electrode with enhanced stability.

[0034] Another object of the present invention is to provide an information data processing terminal, which is used to implement the preparation system of the tin-doped lead dioxide electrode with enhanced stability.

[0035] 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:

[0036] First, the present invention introduces tin into the electrodeposition solution and obtains a modified lead dioxide electrode with high stability and high conductivity by effectively regulating the preparation conditions. The introduction of tin makes the electrode surface more dense, uniform and flat, effectively improving the conductivity and stability of the electrode; it is suitable as a cathode material for electrochemical rust removal.

[0037] The present invention provides a method for using tin-doped lead dioxide as a cathode material in an electro-rust removal process. The method significantly improves the efficiency of electro-rust removal and prolongs the service life of the electrode by optimizing the selection of cathode materials. Compared with traditional graphite cathodes, tin-doped lead dioxide cathodes can better resist corrosion and maintain stable performance at high current density. The present invention demonstrates the superior performance of tin-doped lead dioxide cathodes in an electro-rust removal process through embodiments.

[0038] Second, the technical solution of the present invention solves the problem of insufficient stability of existing lead dioxide electrodes during use in industrial applications, especially the problems of surface structure damage, reduced activity and corrosion that are prone to occur in traditional lead dioxide electrodes during long-term electrochemical reactions. By introducing tin doping technology into the electrode, the present invention effectively enhances the anti-oxidation and anti-corrosion properties of the lead dioxide electrode, making it have a longer service life in harsh environments, reducing the frequency of electrode replacement, and thus improving the overall efficiency of the equipment.

[0039] Compared with traditional electrodes, the present invention improves the crystal structure and conductivity of lead dioxide by doping with tin ions. Tin doping not only improves the mechanical strength and wear resistance of the electrode, but also reduces the peeling of oxides on the electrode surface and the loss of active substances during the electrochemical reaction, and enhances the stability of the electrode under high current density and high potential. This performance improvement greatly expands the application field of lead dioxide electrodes, making their use in industrial fields such as water treatment and electrochemical oxidation more reliable and economical.

[0040] The present invention also optimizes the electrodeposition process to make the surface of the tin-doped lead dioxide electrode more compact and flat, thereby enhancing the corrosion resistance and oxidation resistance of the electrode. The addition of surfactants further improves the uniformity of the electrode surface, making it less likely to have surface defects or cracks during long-term operation, thereby extending the service life of the electrode. This improvement in surface morphology has significant advantages in large-scale industrial applications, reducing maintenance and replacement costs and improving production sustainability.

[0041] In addition, the tin doping technology of the present invention also achieves a good balance between the performance and cost of the electrode. The performance of the lead dioxide electrode is significantly improved through relatively low-cost materials and simple processes, which not only solves the long-term stability problem existing in the prior art, but also shows excellent economic benefits and broad market prospects in practical applications.

[0042] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0043] (1) The adhesion between the titanium substrate and the lead dioxide surface layer of the traditional titanium-based lead dioxide electrode is insufficient. During use, the lead dioxide surface layer is easily detached from the titanium substrate, resulting in electrode failure. The technical solution of the present invention enhances the adhesion between the lead dioxide surface layer and the titanium substrate by doping tin into the lead dioxide surface layer, thereby solving the problem of electrode failure to a large extent.

[0044] (2) Due to the enhanced stability and corrosion resistance of tin-doped electrodes, the use of such electrodes can reduce maintenance time and replacement frequency, and the company's long-term operating costs will be greatly reduced; compared with traditional lead dioxide electrode materials, tin-doped electrodes reduce the generation of waste electrodes, which helps companies improve their competitiveness in the context of increasingly stringent environmental regulations; this technology can be further expanded and applied to other electrochemical fields, such as energy storage and conversion, to increase product lines and market opportunities. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention provides a flowchart of a method for preparing a tin-doped lead dioxide electrode with enhanced stability according to an embodiment of the present invention.

[0046] Figure 2 It is a structural block diagram of a system for preparing a tin-doped lead dioxide electrode with enhanced stability provided by an embodiment of the present invention.

[0047] Figure 3 It is a comparison chart of rust removal efficiency of tin-doped lead dioxide electrode and graphite electrode provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution 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 used to limit the present invention.

[0049] like Figure 1 As shown, a method for preparing a tin-doped lead dioxide electrode with enhanced stability provided by an embodiment of the present invention comprises the following steps:

[0050] S101, dissolving a lead source, a tin source, and a sulfonic acid source in water to prepare a solution;

[0051] S102, adding a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution;

[0052] S103, subjecting the titanium-based anode to an electrodeposition treatment in the electrodeposition solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

[0053] The present invention relates to a method for preparing a tin-doped lead dioxide electrode with enhanced stability, and its working principle is mainly based on the modification of the crystal structure and surface properties of lead dioxide by tin doping during the electrodeposition process. As a doping element, tin helps to enhance the electrical conductivity, mechanical strength and electrochemical stability of the lead dioxide electrode, so that it has more excellent performance in practical applications, especially greatly improving the service life in the fields of electrochemical oxidation and electrolysis.

[0054] First, during the electrodeposition process, tin ions are introduced into the lead dioxide lattice. Since the radius of tin ions is similar to that of lead ions, tin doping can effectively reduce the defects of the lead dioxide lattice and enhance the conductivity of the electrode. In addition, the doping of tin elements in the electrode can form a denser lead dioxide surface layer. This structural optimization can significantly improve the corrosion resistance and mechanical stability of the electrode, especially under harsh electrochemical conditions, the electrode surface is not prone to structural collapse or peeling.

[0055] Secondly, the addition of surfactants helps to regulate the crystal growth mode of tin-doped lead dioxide during the electrodeposition process and optimize the surface morphology of the electrode. Surfactants adjust the growth rate of crystals to make the microstructure of the lead dioxide surface more uniform and smooth, which not only increases the contact area between the electrode surface and the electrolyte, enhances the electrochemical activity of the electrode, but also further improves its wear resistance and service life.

[0056] Finally, the tin-doped lead dioxide layer formed on the titanium-based core layer through the electrodeposition process can effectively enhance the electrode's anti-oxidation and anti-corrosion properties. The titanium-based core layer provides a solid support structure, while the tin-doped lead dioxide layer serves as a functional active layer, combining the high mechanical strength of titanium with the high electrochemical activity of lead dioxide. This composite structure can significantly improve the overall stability of the electrode, allowing it to maintain good electrochemical properties during long-term use.

[0057] The tin-doped lead dioxide electrode with enhanced stability provided by an embodiment of the present invention comprises:

[0058] A titanium-based core layer and a tin-doped lead dioxide surface active layer deposited on the surface of the titanium-based core layer.

[0059] The thickness ratio of the titanium-based core layer to the tin-doped lead dioxide surface active layer provided in the embodiment of the present invention is 1:(2-5); preferably 1:(3.5-4.5).

[0060] In the tin-doped lead dioxide surface active layer provided by the embodiment of the present invention, the mass ratio of tin to lead dioxide is 1:(20-400); preferably, the mass ratio of tin to lead dioxide is 1:(50-300).

[0061] The electrodeposition treatment conditions provided in the embodiment of the present invention are: current density 5-15 mA / cm 2 , the temperature is 15-25°C, the plate spacing is 2-3.5 cm, and the deposition time is 30-120 min;

[0062] The electrodeposition solution should at least include: a lead source, a tin source, and a sulfonic acid source;

[0063] The lead source is one or more of lead nitrate and lead methanesulfonate;

[0064] The tin source is tin methanesulfonate, [SnF6] 2- One or more of;

[0065] The sulfonic acid source is one or more of methanesulfonic acid, ethylsulfonic acid, and trifluoromethanesulfonic acid;

[0066] The electrodeposition solution should also include a fluorine source and a surfactant;

[0067] The fluoride source is one or more of potassium fluoride, sodium fluoride and ammonium fluoride;

[0068] The surfactant is one or more of sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium butylnaphthalene sulfonate;

[0069] The pH of the electrodeposition solution is 0.3 to 1.5;

[0070] The molar concentration of the lead source in the electrodeposition solution is 0.05 to 0.15 mol / L;

[0071] The molar concentration of the tin source in the electrodeposition solution is 0.005 to 0.015 mol / L;

[0072] The molar concentration of the sulfonic acid source in the electrodeposition solution is 0.08 to 0.13 mol / L.

[0073] The embodiment of the present invention provides a tin-doped lead dioxide electrode with enhanced stability for use in electrochemical rust removal.

[0074] like Figure 2 As shown, a system for preparing a tin-doped lead dioxide electrode with enhanced stability provided by an embodiment of the present invention comprises:

[0075] A dissolving module is used to dissolve a lead source, a tin source, and a sulfonic acid source in water to prepare a solution; and to add a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution;

[0076] The electroplating treatment module is used for electroplating the titanium-based anode in the electroplating solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

[0077] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for preparing the tin-doped lead dioxide electrode with enhanced stability.

[0078] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to perform the steps of the method for preparing the tin-doped lead dioxide electrode with enhanced stability.

[0079] Another object of the present invention is to provide an information data processing terminal, which is used to implement the preparation system of the tin-doped lead dioxide electrode with enhanced stability.

[0080] The present invention is specifically implemented:

[0081] <Example 1>

[0082] The method for preparing a tin-doped lead dioxide electrode with enhanced stability comprises the following steps:

[0083] Step 1: 5×10 -2 mol of Pb(CH3SO3)2, 5×10 -3 mol of (CH3COO)4Sn, 5.5×10 -2 mol of CH3SO3H was added to a beaker containing 500 mL of distilled water and stirred thoroughly until the mixture was dissolved to form a mixed solution;

[0084] Step 2: Add 2.5×10 -3 mol of NaF, 5×10 -5 mol of C 12 H 25 NaSO4, stirring thoroughly until the mixture is dissolved to prepare an electrodeposition solution;

[0085] Step 3: Place the polished titanium plate of 50×50×1 mm into the above-mentioned electrodeposition solution at an anode current density of 10 mA / cm 2 Under the conditions of solution temperature of 20℃ and plate spacing of 2.5cm, tin-doped lead dioxide electrode with enhanced stability was obtained by electrodeposition for 60min.

[0086] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, the stainless steel plate with oxide scale was used as the anode, and 20% Na2SO4 solution was used as the electrolyte for electrochemical rust removal at a current density of 25 mA / cm 2, the plate spacing is 3cm, the rust removal temperature is 30℃; the rust removal time is 0.5h, the rust removal efficiency is 98%, and the cathode corrosion rate is 0.05mg / cm 2 .

[0087] <Example 2>

[0088] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 1, 2.5×10 -2 mol of Pb(CH3SO3)2, 2.5×10 -3 mol of (CH3COO)4Sn, 4×10 -2 mol of CH3SO3H.

[0089] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.8 h, the rust removal efficiency was 95%, and the cathode corrosion rate was 0.08 mg / cm 2 .

[0090] <Example 3>

[0091] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 1, 7.5×10 -2 mol of Pb(CH3SO3)2, 7.5×10 -3 mol of (CH3COO)4Sn, 6.5×10 -2 mol of CH3SO3H.

[0092] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.6 h, the rust removal efficiency was 93%, and the cathode corrosion rate was 0.06 mg / cm 2 .

[0093] <Example 4>

[0094] The steps of this embodiment are basically the same as those of Embodiment 1, except that in Step 1, Pb(CH3SO3)2 and CH3SO3H are replaced by Pb(NO3)2 and HNO3.

[0095] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.8 h, the rust removal efficiency was 97%, and the cathode corrosion rate was 0.08 mg / cm 2 .

[0096] <Example 5>

[0097] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 2, NaF is replaced by KF.

[0098] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.9 h, the rust removal efficiency was 91%, and the cathode corrosion rate was 0.07 mg / cm 2 .

[0099] <Example 6>

[0100] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 2, NaF is replaced by NH4F.

[0101] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.7 h, the rust removal efficiency was 89%, and the cathode corrosion rate was 0.06 mg / cm 2 .

[0102] <Example 7>

[0103] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 2, C 12 H 25 NaSO4 was replaced by C 18 H 29 NaO3S.

[0104] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.9 h, the rust removal efficiency was 92%, and the cathode corrosion rate was 0.08 mg / cm 2 .

[0105] <Example 8>

[0106] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 3, the anode current density is 5 mA / cm 2 .

[0107] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.7 h, the rust removal efficiency was 92%, and the cathode corrosion rate was 0.06 mg / cm 2 .

[0108] <Example 9>

[0109] The steps of this embodiment are basically the same as those of embodiment 1, except that in step 3, the anode current density is 15 mA / cm 2 .

[0110] The obtained tin-doped lead dioxide electrode with enhanced stability was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 0.6 h, the rust removal efficiency was 94%, and the cathode corrosion rate was 0.07 mg / cm 2 .

[0111] <Comparative Example 1>

[0112] Step 1: Add 4.5 g of high-purity graphite powder and 1 g of PVDF into a blue-mouth bottle containing 40 mL of NMP and seal it. Use a magnetic stirrer to stir the mixture for 12 h to form a uniform slurry.

[0113] Step 2: evenly coat the slurry on the copper foil substrate, use a film coater to control the coating thickness to be 100 μm, and after coating, place the electrode material in a vacuum oven at 80° C. for 12 hours to remove the solvent;

[0114] Step 3: Place the dried electrode sheet into an electrode tablet press and apply a certain amount of pressure to increase the density and conductivity of the electrode. The electrode after tableting should remain uniform and flat with no cracks on the surface.

[0115] Step 4: further drying the prepared graphite electrode sheet in a vacuum oven, usually at 120° C. for 12 h, to ensure that the solvent in the electrode is completely volatilized;

[0116] Step 5: Cut the prepared electrode sheet into 50×50 mm rectangles for later use.

[0117] The obtained graphite electrode was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 1.5 h, the rust removal efficiency was 88%, and the cathode corrosion rate was 0.3 mg / cm 2 .

[0118] <Comparative Example 2>

[0119] The steps of this comparative example are basically the same as those of comparative example 1, except that in step 2, a film applicator is used to control the coating thickness to be 200 μm.

[0120] The obtained graphite electrode was used as the cathode, and the stainless steel plate with oxide scale was used as the anode. The rust removal conditions were the same as those in Example 1. The rust removal time was 2.0 h, the rust removal efficiency was 91%, and the cathode corrosion rate was 0.5 mg / cm 2 .

[0121] Table 1 Performance data of different electrodes

[0122]

[0123]

[0124] 1. Specific application fields or related products of the present invention.

[0125] The present invention is specifically applied to the field of electrochemical rust removal, and the tin-doped lead dioxide electrode helps to enhance the conductivity, stability and corrosion resistance of the electrode, thereby reducing the operating costs of the enterprise.

[0126] 2. Relevant evidence of the technical effects obtained by the embodiments of the present invention.

[0127] Figure 3 It shows that using tin-doped lead dioxide electrode as cathode can effectively improve the efficiency of electrolytic rust removal and reduce the rust removal time compared with graphite electrode.

[0128] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0129] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a tin-doped lead dioxide electrode with enhanced stability, characterized in that: The following steps are involved: Step 1, dissolving a lead source, a tin source and a sulfonic acid source in water to prepare a solution; Step 2, adding a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution; Step 3: Electrodepositing the titanium-based anode in the electroplating solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

2. The method for preparing the tin-doped lead dioxide electrode with enhanced stability as claimed in claim 1, characterized in that: The tin-doped lead dioxide electrode with enhanced stability comprises: A titanium-based core layer and a tin-doped lead dioxide surface active layer deposited on the surface of the titanium-based core layer.

3. The preparation method and application of the tin-doped lead dioxide electrode with enhanced stability as claimed in claim 2, characterized in that: The thickness ratio of the titanium-based core layer to the tin-doped lead dioxide surface active layer is 1:(2-5); preferably 1:(3.5-4.5).

4. The method for preparing the tin-doped lead dioxide electrode with enhanced stability as claimed in claim 2 or 3, characterized in that: In the tin-doped lead dioxide surface active layer, the mass ratio of tin to lead dioxide is 1:(20-400); preferably, the mass ratio of tin to lead dioxide is 1:(50-300).

5. The preparation method and application of the tin-doped lead dioxide electrode with enhanced stability as claimed in claim 1, characterized in that: The conditions of the electrodeposition treatment are: current density 5-15 mA / cm 2 , the temperature is 15-25°C, the plate spacing is 2-3.5 cm, and the deposition time is 30-120 min; The electrodeposition solution should at least include: a lead source, a tin source, and a sulfonic acid source; The lead source is one or more of lead nitrate and lead methanesulfonate; The tin source is tin methanesulfonate, [SnF6] 2- One or more of; The sulfonic acid source is one or more of methanesulfonic acid, ethylsulfonic acid, and trifluoromethanesulfonic acid; The electrodeposition solution should also include a fluorine source and a surfactant; The fluoride source is one or more of potassium fluoride, sodium fluoride and ammonium fluoride; The surfactant is one or more of sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium butylnaphthalene sulfonate; The pH of the electrodeposition solution is 0.3 to 1.5; The molar concentration of the lead source in the electrodeposition solution is 0.05 to 0.15 mol / L; The molar concentration of the tin source in the electrodeposition solution is 0.005 to 0.015 mol / L; The molar concentration of the sulfonic acid source in the electrodeposition solution is 0.08 to 0.13 mol / L.

6. Use of the tin-doped lead dioxide electrode with enhanced stability as claimed in any one of claims 1 to 5 in electrochemical rust removal.

7. A system for preparing a tin-doped lead dioxide electrode with enhanced stability for implementing the method for preparing a tin-doped lead dioxide electrode with enhanced stability as claimed in any one of claims 1 to 6, characterized in that: The preparation system of the tin-doped lead dioxide electrode with enhanced stability comprises: A dissolving module is used to dissolve a lead source, a tin source, and a sulfonic acid source in water to prepare a solution; and to add a fluorine source and a surfactant to the electrodeposition solution to prepare an electrodeposition solution; The electroplating treatment module is used for electroplating the titanium-based anode in the electroplating solution to obtain a tin-doped lead dioxide electrode with enhanced stability.

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