An acidic activation liquid for uniformly activating the front surface of steel material before electrolysis and a method of use

Abstract

The present application relates to a kind of steel electrolysis front surface uniform activation with acidic activation liquid and use method, acidic activation liquid includes: metal ion coagulant 4%~8%, Na2CO3 0.25%~1.2%, CuSO4 0.7%~1.5%, and NaHSO3 0.1%~0.8%, the rest is deionized water.Acidic activation liquid is used with a kind of steel surface uniform activation treatment device, can make up the deficiency of existing electrolysis front surface treatment technology, create favorable conditions for subsequent electrolysis process;Thus significantly reduce the application and maintenance cost of steel, the use of steel in industrial atmospheric environment has important engineering application value, while saving resources and energy, improving the environmental protection of steel surface treatment, improving the international competitiveness of steel all have important significance.

Description

Technical Field

[0001] This invention relates to the field of steel surface treatment technology, and in particular to an acidic activating solution for uniformly activating the surface of steel before electrolysis and its application method. Background Technology

[0002] The most prominent advantage of steel is that it can be used without painting. The concept of using it bare is "rust prevention with rust". That is, under long-term exposure, a dense and continuous protective rust layer can be formed between the loose external corrosion product layer on its surface and the substrate. This rust layer has good stability and fine and dense structure, which can effectively isolate the contact between the corrosive medium and the steel substrate, inhibit the corrosion of the internal steel, and thus effectively block the penetration and diffusion of the corrosive medium.

[0003] However, it takes at least 3 to 5 years for steel to form a stable rust layer in the natural environment. Furthermore, in the initial stages of use, rust dripping and spreading can pollute the environment (commonly referred to as "running rust"), significantly affecting the uniformity of the steel's color and polluting the surrounding environment. Therefore, it is necessary to treat the steel surface with electrolytic acceleration of rust formation or to use electroplating to apply a coating. This not only hinders the intrusion of corrosive ions but also reduces the formation of unstable, loose phases and promotes the formation of dense, stable phases, allowing a protective layer to quickly form on the steel surface. This enables the steel to be used for extended periods in industrial atmospheric environments.

[0004] However, since steel is covered with an oxide layer when it leaves the factory, if surface pretreatment is not performed before electrolytic treatment to accelerate rust formation, the electrolytic process will be uneven and incomplete, severely affecting the quality of the steel surface stabilization treatment and seriously impacting the subsequent industrial application of the steel. Existing surface pretreatment technologies before electrolysis mostly involve removing iron oxide scale from the steel surface. Methods include pickling and sandblasting, which are complex processes, increase costs, and can easily cause environmental pollution.

[0005] Chinese invention patent CN102925884B discloses a "method for spraying pretreatment to accelerate the stabilization of rust layer on steel surfaces." The method involves mixing 0.6% NaCl, 0.9% FeSO4, 0.6% CuSO4, and 0.9% NaHSO4 by weight with water to obtain a surface treatment agent, which is then sprayed onto the steel surface. The chemical substances in the solution react with the steel substrate to form a uniform and dense protective rust layer, making the steel more aesthetically pleasing during use and preventing rust solution runoff, thus protecting the environment from pollution. However, the spraying cost is high, and the spraying solution easily clogs the spraying equipment, making widespread adoption difficult.

[0006] Chinese invention patent CN105568208B discloses "a method for surface treatment of steel," which involves shot peening the steel surface followed by high-temperature oxidation at 250℃-350℃ for 1-4 hours to obtain a dense, reddish-brown oxide layer. This oxide layer has an appearance similar to that of the steel after long-term service and promotes the formation of a stable rust layer. However, shot peening can lead to unevenness on the surface of the plate and may even deteriorate the steel's properties. Furthermore, it has drawbacks such as complex production processes, long workflows, and poor continuous production capacity, making large-scale mass production impossible.

[0007] Chinese patent application CN111733413A discloses a "method for rust removal from steel," which solves the problem of rust removal from steel by implementing several steps including steel substrate treatment, spraying a treatment liquid onto the steel surface, and rust curing. This method achieves rapid and uniform rust removal. However, the composite treatment liquid used causes serious environmental pollution and introduces many impurities onto the steel surface, making large-scale application difficult.

[0008] Therefore, there is an urgent need for a surface treatment process for steel before electrolysis to make up for the shortcomings of existing surface pretreatment technologies. Summary of the Invention

[0009] This invention provides an acidic activating solution for uniformly activating the surface of steel before electrolysis and its application method. The acidic activating solution is used in conjunction with a steel surface uniform activation treatment device, which can overcome the shortcomings of existing surface treatment technologies before electrolysis and create favorable conditions for subsequent electrolysis processes. This significantly reduces the application and maintenance costs of steel, has important engineering application value for the use of steel in industrial atmospheric environments, and is also of great significance for saving resources and energy, improving the environmental friendliness of steel surface treatment, and enhancing the international competitiveness of steel.

[0010] To achieve the above objectives, the present invention employs the following technical solution: An acidic activation solution for a uniform surface activation process of steel before electrolysis, wherein the acidic activation solution comprises, by weight percentage: 4%–8% metal ion coagulant, 0.25%–1.2% Na2CO3, 0.7%–1.5% CuSO4, and 0.1%–0.8% NaHSO3, with the balance being deionized water.

[0011] Furthermore, the metal ion coagulant is composed of sodium carboxymethyl cellulose and sodium hexametaphosphate, and the content of sodium carboxymethyl cellulose is 2% to 4% and the content of sodium hexametaphosphate is 2% to 4% by weight percentage of the acidic activating solution.

[0012] Furthermore, the pH value of the acidic activating solution is 2 to 3.

[0013] A method for using an acidic activating solution in a steel surface uniform activation process before electrolysis, used in conjunction with a steel surface uniform activation treatment device; specifically including the following steps: 1) Prepare a uniform activation treatment device for steel surface, including an activator, a steel clamping mechanism, and nano-ceramic particles; the activator is a sealed container consisting of an activator body and a top cover, with the activator body and top cover being detachably and sealed together; the steel clamping mechanism is located inside the activator body for clamping the steel; the activator body is filled with several nano-ceramic particles on the upper and lower sides of the steel; several activation liquid inlets are opened on the top and sides of the activator, and the activation liquid inlets are connected to an activation liquid storage tank through activation liquid delivery pipes; a delivery pump and valve are installed on the activation liquid delivery pipe near the activation liquid storage tank; several activation liquid outlets are located at the bottom of the activator body, and the activation liquid outlets are connected to the activation liquid storage tank through activation liquid recovery pipes; filters are installed inside the activator corresponding to the activation liquid inlets and outlets; one-way valves are installed on the activation liquid delivery pipe near the activation liquid inlet and the activation liquid recovery pipe near the activation liquid outlet; a filter is installed on the activation liquid recovery pipe; 2) Clean and dry the surface of the steel, open the top cover, and fill a portion of the nano-ceramic particles into the activator body; use the steel clamping mechanism to fix the steel into the activator body; fill the remaining portion of nano-ceramic particles on top of the steel, and then seal the activator body through the top cover. 3) Connect the activator to the activation liquid storage tank through the activation liquid delivery pipeline and the activation liquid recovery pipeline, start the delivery pump, and inject high-pressure acidic activation liquid into the activator; the acidic activation liquid drives the polygonal nano-ceramic particles to vibrate and scour the steel surface, so as to uniformly activate the steel surface; 4) After the uniform activation process is completed, open the top cover, take out the uniformly activated steel, and clean the surface of the steel.

[0014] In step 3), the temperature of the acidic activation solution is 35-45°C, the pressure is 100-140 bar, and the flow rate is 30-60 L / min.

[0015] In step 3), the filling rate of nano-ceramic particles below the steel is 3% to 5% of the activator volume, and the filling rate of nano-ceramic particles above the steel is 5% to 10% of the activator volume; the uniform activation time is 2 to 7 hours.

[0016] During the uniform activation process in step 3), the pH value of the acidic activation solution is monitored periodically.

[0017] Monitor the pH value of the acidic activation solution every 3 to 5 minutes.

[0018] While regularly monitoring the pH value of the acidic activation solution, an acidic pH adjuster is added to maintain the pH value of the acidic activation solution at 2-3.

[0019] The acidic pH adjuster is a white powder of superior grade NaHSO4.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1) The acidic activating liquid described in this invention is used in conjunction with a uniform activation treatment device for steel surface. By introducing a high-speed flowing acidic activating liquid into the activator, polygonal nano-ceramic particles are continuously impacted and washed by the steel surface. This removes the hot-rolled oxide layer on the steel surface while uniformly activating the steel plate surface, allowing the particles on the steel surface to obtain sufficient energy. The electrons on the steel surface transition from a lower ground state energy level to a higher energy level, thereby making the particles on the steel surface more active and creating favorable conditions for the subsequent electrolysis process. 2) In the acidic activation solution, components such as Na2CO3, CuSO4 and NaHSO3 can create favorable conditions for the subsequent electrolysis process. The metal ion coagulant composed of sodium carboxymethyl cellulose and sodium hexametaphosphate can polymerize and coagulate metal element ions such as Cu and Na in the acidic activation solution, and wrap them around the polygonal nano-ceramic particles to improve the uniform activation effect. 3) Conventional surface treatment processes for steel before electrolysis, such as shot blasting and sandblasting, can easily cause unevenness on the steel surface or even incomplete removal of the oxide layer, making it difficult for the subsequent electrolysis process to proceed smoothly. Ultimately, the steel will experience problems such as cracking due to insufficient corrosion resistance during application. The acidic activation liquid described in this invention, combined with the steel surface uniform activation device, can significantly improve the uniformity of steel surface activation before electrolysis, creating favorable conditions for the subsequent electrolysis process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a steel surface uniform activation treatment device according to the present invention.

[0022] Figure 2 This is a schematic diagram of the activator described in this invention.

[0023] Figure 3 This is a comparison chart of the electrolysis effects of different activation processes used in the embodiments and comparative examples of the present invention.

[0024] In the diagram: 1. Activator 101. Activator body 102. Top cover 103. Activation solution inlet 104. Activation solution outlet 2. Steel 3. Activation solution storage tank 4. Valve 5. Transfer pump 6. Filter screen 7. Check valve 8. Filter 9. Nano-ceramic particles 10. Steel clamping mechanism Detailed Implementation

[0025] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings: The present invention discloses an acidic activation solution for a uniform surface activation process of steel before electrolysis. The acidic activation solution comprises, by weight percentage: 4%–8% metal ion coagulant, 0.25%–1.2% Na2CO3, 0.7%–1.5% CuSO4, and 0.1%–0.8% NaHSO3, with the balance being deionized water.

[0026] Furthermore, the metal ion coagulant is composed of sodium carboxymethyl cellulose and sodium hexametaphosphate, and the content of sodium carboxymethyl cellulose is 2% to 4% and the content of sodium hexametaphosphate is 2% to 4% by weight percentage of the acidic activating solution.

[0027] Furthermore, the acidic activation solution has a pH of 2–3 and a density of 0.8–0.95 g / cm³. 3 The viscosity at room temperature is 1500–1700 Pa·s; the operating temperature is 35–45℃.

[0028] The present invention describes a method for using an acidic activation solution in a steel surface uniform activation process before electrolysis, which is used in conjunction with a steel surface uniform activation treatment device; specifically, it includes the following steps: 1) Prepare a device for uniformly activating the surface of steel, such as... Figure 1 , Figure 2 As shown, the device includes an activator 1, a steel clamping mechanism 10, and nano-ceramic particles 9. The activator 1 is a sealed container consisting of an activator body 101 and a top cover 102, with the activator body 101 and the top cover 102 being detachably and sealed together. The steel clamping mechanism 9 is located inside the activator body 101 and is used to clamp steel 2. The activator body 101 is filled with several nano-ceramic particles 9 on the upper and lower sides of the steel 1. Several activation liquid inlets 103 are opened on the top and sides of the activator 1, through which activation liquid is transported. A pipeline connects to the activation solution storage tank 3. A delivery pump 5 and a valve 4 are installed on the activation solution delivery pipeline near the activation solution storage tank 3. Several activation solution outlets 104 are provided at the bottom of the activator body 101. The activation solution outlets 104 are connected to the activation solution storage tank 3 through activation solution recovery pipelines. Filter screens 6 are installed in the activator 1 corresponding to the activation solution inlet 103 and the activation solution outlet 104. One-way valves 7 are installed on the activation solution delivery pipeline near the activation solution inlet 103 and the activation solution recovery pipeline near the activation solution outlet 104. A filter 8 is installed on the activation solution recovery pipeline. 2) Clean and dry the surface of the steel, open the top cover 102, and fill a portion of the nano-ceramic particles 9 into the activator body 101; use the steel clamping mechanism 10 to fix the steel 2 into the activator body 101; fill the remaining portion of the nano-ceramic particles 9 on top of the steel 2, and then close the activator body 101 through the top cover 102. 3) Connect the activator 1 to the activation liquid storage tank 3 through the activation liquid delivery pipe and the activation liquid recovery pipe, start the delivery pump 5, and inject high-pressure acidic activation liquid into the activator 1; the acidic activation liquid drives the polygonal nano-ceramic particles 9 to vibrate and scour the surface of the steel 2, so as to uniformly activate the surface of the steel 2. 4) After the uniform activation process is completed, open the top cover 102, take out the uniformly activated steel, and clean the surface of the steel.

[0029] Furthermore, in step 3), the temperature of the acidic activation solution is 35–45°C, the pressure is 100–140 bar, and the flow rate is 30–60 L / min.

[0030] Furthermore, in step 3), the filling rate of nano-ceramic particles below the steel is 3% to 5% of the activator volume, and the filling rate of nano-ceramic particles above the steel is 5% to 10% of the activator volume; the uniform activation time is 2 to 7 hours.

[0031] Furthermore, during the uniform activation process in step 3), the pH value of the acidic activation solution is monitored periodically.

[0032] Furthermore, the pH value of the acidic activation solution was monitored every 3 to 5 minutes.

[0033] Furthermore, while monitoring the pH value of the acidic activation solution regularly, an acidic pH adjuster is added to maintain the pH value of the acidic activation solution at 2-3.

[0034] Furthermore, the acidic pH adjuster is a white powder of superior purity NaHSO4.

[0035] During uniform activation, the acidic activation solution is drawn from the activation solution storage tank 3 by the delivery pump 5, pressurized and sent into the activator 1, which drives the polygonal nano-ceramic particles 9 to vibrate and scour the surface of the steel 2, thereby uniformly activating the surface of the steel 2. During the uniform activation process, the acidic activation solution is recycled, entering the activator 1 from the activation solution inlet 103 and flowing out from the activation solution outlet 104. In order to prevent the nano-ceramic particles 9 in the activator 1 from flowing out, filter screens 6 are provided at both the activation solution inlet 103 and the activation solution outlet 104. One-way valves 7 are provided on both the activation solution delivery pipeline and the activation solution recovery pipeline. The acidic activation solution flowing out of the activator 1 is further filtered by the filter 8 and then returned to the activation solution storage tank 3 for recycling.

[0036] After uniform activation, the steel surface is cleaned with deionized water and can be directly used for electrolytic coating to achieve super corrosion resistance.

[0037] To further describe the present invention, the following description is in conjunction with the accompanying drawings. Figure 1-3The present invention will be specifically illustrated by the embodiments and comparative examples, thereby making its advantages and various effects more clearly apparent. Those skilled in the art will understand that these specific embodiments and examples are for illustrative purposes only and are not intended to limit the invention.

[0038] Throughout this specification, unless otherwise specified, the terminology used herein should be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the event of any conflict, this specification shall prevail.

[0039] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0040]

Example

[0041] Comparison of electrolysis effects of different activation processes in various embodiments and comparative examples Figure 3 As shown.

[0042] Comparative Example 1 The conventional steel surface activation process is adopted, specifically the steel is shot peened to make the surface roughness of the steel Ra2.50μm.

[0043] The steel treated with shot peening was subjected to electrolytic accelerated rust formation treatment. The time required for the rust layer to form on the steel surface was 36 hours, the thickness of the rust layer was 30 micrometers, the adhesion was grade 1, the impact resistance was 150cm, the color difference value ΔE of different parts of the steel surface was 7, and there were problems such as uneven appearance color and rust water flow that affected the appearance.

[0044]

Example 1

[0045] The pH of the acidic activation solution is maintained at 2-3; the temperature is 40℃.

[0046] In this embodiment, the process of using the acidic activation solution for uniformly activating the surface of the steel before electrolysis is as follows: 1) Prepare a device for uniformly activating the surface of steel, such as... Figure 1 , Figure 2 As shown, the device includes an activator 1, a steel clamping mechanism 10, and nano-ceramic particles 9. The activator 1 is a sealed container consisting of an activator body 101 and a top cover 102, with the activator body 101 and the top cover 102 being detachably and sealed together. The steel clamping mechanism 9 is located inside the activator body 101 and is used to clamp steel 2. The activator body 101 is filled with several nano-ceramic particles 9 on the upper and lower sides of the steel 1. Several activation liquid inlets 103 are opened on the top and sides of the activator 1, through which activation liquid is transported. A pipeline connects to the activation solution storage tank 3. A delivery pump 5 and a valve 4 are installed on the activation solution delivery pipeline near the activation solution storage tank 3. Several activation solution outlets 104 are provided at the bottom of the activator body 101. The activation solution outlets 104 are connected to the activation solution storage tank 3 through activation solution recovery pipelines. Filter screens 6 are installed in the activator 1 corresponding to the activation solution inlet 103 and the activation solution outlet 104. One-way valves 7 are installed on the activation solution delivery pipeline near the activation solution inlet 103 and the activation solution recovery pipeline near the activation solution outlet 104. A filter 8 is installed on the activation solution recovery pipeline. 2) Clean the oil, dust, and other debris from the steel surface with anhydrous ethanol and blow it dry. Open the top cover 102 and fill a portion of the nano-ceramic particles 9 into the activator body 101. Use the steel clamping mechanism 10 to fix the steel 2 into the activator body 101. Fill the remaining portion of the nano-ceramic particles 9 above the steel 2, and then seal the activator body 101 with the top cover 102. The nano-ceramic particle filling rate below the steel is 3.5% of the activator volume, and the nano-ceramic particle filling rate above the steel is 6% of the activator volume. 3) Connect activator 1 to activation liquid storage tank 3 through activation liquid delivery pipe and activation liquid recovery pipe, start delivery pump 5, and inject acidic activation liquid at a pressure of 120 bar into activator 1; the flow rate of acidic activation liquid is 55 L / min; the acidic activation liquid drives polygonal nano-ceramic particles 9 to vibrate and scour the surface of steel 2, so as to uniformly activate the surface of steel 2; the activation time is 6 hours; 4) During the uniform activation process, monitor the pH value of the acidic activation solution every 3 minutes. If the pH value of the acidic activation solution exceeds 3, add an acidic pH adjuster (white powdered high-purity NaHSO4) to adjust the acidic activation solution to the range of 2-3.

[0047] 5) After the uniform activation process is completed, open the top cover 102, take out the uniformly activated steel 2, and clean the surface of the steel.

[0048] The steel, after being uniformly activated and cleaned, was electrolyzed to generate a rust layer. The rust layer formed on the steel surface was 70 micrometers thick. It took 3 hours for the rust layer to uniformly cover the steel surface. The adhesion was grade 0, the impact resistance was 250cm, and the color difference value ΔE of different parts of the steel surface was 5. No problems affecting the appearance, such as uneven color or rust water flow, were found.

[0049]

Example 2

[0050] The pH of the acidic activation solution is maintained at 2-3; the temperature is 45℃.

[0051] In this embodiment, the process of using the acidic activation solution for uniformly activating the surface of the steel before electrolysis is as follows: 1) Prepare a uniform activation treatment device for steel surface, which is the same as the device used in Example 1; 2) Clean the oil, dust, and other debris from the steel surface with anhydrous ethanol and blow it dry. Open the top cover and fill a portion of the activator body with nano-ceramic particles. Use the steel clamping mechanism to fix the steel body into the activator body. Fill the remaining portion of nano-ceramic particles on top of the steel, and then seal the activator body with the top cover. The nano-ceramic particle filling rate below the steel is 4.2% of the activator volume, and the nano-ceramic particle filling rate above the steel is 7.8% of the activator volume. 3) Connect the activator to the activation liquid storage tank through the activation liquid delivery pipeline, start the delivery pump, and inject acidic activation liquid at a pressure of 120 bar into the activator; the flow rate of the acidic activation liquid is 50 L / min; the acidic activation liquid drives the polygonal nano-ceramic particles to vibrate and scour the steel surface, so as to uniformly activate the steel surface; the activation time is 3 hours. 4) During the uniform activation process, monitor the pH value of the acidic activation solution every 5 minutes. If the pH value of the acidic activation solution exceeds 3, add an acidic pH adjuster (white powdered high-purity NaHSO4) to adjust the acidic activation solution to the range of 2-3.

[0052] 5) After the uniform activation process is completed, open the top cover, take out the uniformly activated steel, and clean the surface of the steel.

[0053] The activated and cleaned steel was electrolyzed to generate a rust layer. The rust layer formed on the steel surface was 75 micrometers thick. It took 3.5 hours for the rust layer to evenly cover the steel surface. The adhesion was grade 0, the impact resistance was 300cm, and the color difference value ΔE of different parts of the steel surface was 4. No problems affecting the appearance, such as uneven color or rust water flow, were found.

[0054]

Example 3

[0055] The pH of the acidic activation solution is maintained at 2-3; the temperature is 35℃.

[0056] In this embodiment, the process of using the acidic activation solution for uniformly activating the surface of the steel before electrolysis is as follows: 1) Prepare a uniform activation treatment device for steel surface, the device used is the same as in Example 1; 2) Clean the oil, dust, and other debris from the steel surface with anhydrous ethanol and blow it dry. Open the top cover and fill a portion of the activator body with nano-ceramic particles. Use the steel clamping mechanism to fix the steel body into the activator body. Fill the remaining portion of nano-ceramic particles on top of the steel, and then seal the activator body with the top cover. The nano-ceramic particle filling rate below the steel is 3.6% of the activator volume, and the nano-ceramic particle filling rate above the steel is 8.4% of the activator volume. 3) Connect the activator to the activation liquid storage tank through the activation liquid delivery pipeline, start the delivery pump, and inject acidic activation liquid at a pressure of 130 bar into the activator; the flow rate of the acidic activation liquid is 30 L / min; the acidic activation liquid drives the polygonal nano-ceramic particles to vibrate and scour the steel surface, uniformly activating the steel surface; the activation time is 2 hours. 4) During the uniform activation process, monitor the pH value of the acidic activation solution every 4 minutes. If the pH value of the acidic activation solution exceeds 3, add an acidic pH adjuster (white powdered high-purity NaHSO4) to adjust the acidic activation solution to the range of 2-3.

[0057] 5) After the uniform activation process is completed, open the top cover, take out the uniformly activated steel, and clean the surface of the steel.

[0058] The activated and cleaned steel was electrolyzed to generate a rust layer. The rust layer formed on the steel surface was 68 micrometers thick. It took 2.7 hours for the rust layer to uniformly cover the steel surface. The adhesion was grade 0, the impact resistance was 230cm, and the color difference value ΔE of different parts of the steel surface was 6. No problems affecting the appearance, such as uneven color or rust water flow, were found.

[0059] The above comparison demonstrates that the acidic activation solution for uniformly activating the surface of steel before electrolysis, as described in this invention, combined with a steel surface uniform activation treatment device, can overcome the shortcomings of existing pre-electrolysis surface treatment technologies, creating favorable conditions for subsequent electrolysis processes. This significantly reduces the application and maintenance costs of steel and has significant engineering application value in ensuring the long-term use of steel in industrial atmospheric environments. It is also of great importance for saving resources and energy and improving the international competitiveness of steel.

[0060] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. For example, the composition and pH value of the acidic activation solution, the composition of the metal ion coagulant, the activation temperature, and the activation time are all limited within the scope of the present invention. Any variations or modifications to the above embodiments will fall within the scope of protection of the claims of the present invention.

[0061] The main components of the acidic activating solution of the present invention, by weight percentage, also include the following examples, as shown in Table 2: Table 2

[0062] It should be understood that the endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0063] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0064] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is accorded the widest scope consistent with the principles claimed herein.

Claims

1. An acidic activation solution for a uniform surface activation process of steel before electrolysis, characterized in that, The acidic activation solution comprises, by weight percentage: 4%–8% metal ion coagulant, 0.25%–1.2% Na2CO3, 0.7%–1.5% CuSO4, and 0.1%–0.8% NaHSO3, with the balance being deionized water; the metal ion coagulant is composed of sodium carboxymethyl cellulose and sodium hexametaphosphate, and by weight percentage of the acidic activation solution, the content of sodium carboxymethyl cellulose is 2%–4%, and the content of sodium hexametaphosphate is 2%–4%; the pH value of the acidic activation solution is 2–3.

2. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis as described in claim 1, characterized in that, Used in conjunction with a uniform activation treatment device for steel surfaces; specifically including the following steps: 1) Prepare a uniform activation treatment device for steel surface, including an activator, a steel clamping mechanism, and nano-ceramic particles; the activator is a sealed container consisting of an activator body and a top cover, with the activator body and top cover being detachably and sealed together; the steel clamping mechanism is located inside the activator body for clamping the steel; the activator body is filled with several nano-ceramic particles on the upper and lower sides of the steel; several activation liquid inlets are opened on the top and sides of the activator, and the activation liquid inlets are connected to an activation liquid storage tank through activation liquid delivery pipes; a delivery pump and valve are installed on the activation liquid delivery pipe near the activation liquid storage tank; several activation liquid outlets are located at the bottom of the activator body, and the activation liquid outlets are connected to the activation liquid storage tank through activation liquid recovery pipes; filters are installed inside the activator corresponding to the activation liquid inlets and outlets; one-way valves are installed on the activation liquid delivery pipe near the activation liquid inlet and the activation liquid recovery pipe near the activation liquid outlet; a filter is installed on the activation liquid recovery pipe; 2) Clean and dry the surface of the steel, open the top cover, and fill a portion of the nano-ceramic particles into the activator body; use the steel clamping mechanism to fix the steel into the activator body; fill the remaining portion of nano-ceramic particles on top of the steel, and then seal the activator body through the top cover. 3) Connect the activator to the activation liquid storage tank through the activation liquid delivery pipeline, start the delivery pump, and inject high-pressure acidic activation liquid into the activator; the acidic activation liquid drives the polygonal nano-ceramic particles to vibrate and scour the steel surface, so as to uniformly activate the steel surface; 4) After the uniform activation process is completed, open the top cover, take out the uniformly activated steel, and clean the surface of the steel.

3. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 2, characterized in that, In step 3), the temperature of the acidic activation solution is 35-45°C, the pressure is 100-140 bar, and the flow rate is 30-60 L / min.

4. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 2, characterized in that, In step 3), the filling rate of nano-ceramic particles below the steel is 3% to 5% of the activator volume, and the filling rate of nano-ceramic particles above the steel is 5% to 10% of the activator volume; the uniform activation time is 2 to 7 hours.

5. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 2, characterized in that, During the uniform activation process in step 3), the pH value of the acidic activation solution is monitored periodically.

6. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 5, characterized in that, Monitor the pH value of the acidic activation solution every 3 to 5 minutes.

7. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 5, characterized in that, While regularly monitoring the pH value of the acidic activation solution, an acidic pH adjuster is added to maintain the pH value of the acidic activation solution at 2-3.

8. The method of using the acidic activation solution for the uniform surface activation process of steel before electrolysis according to claim 7, characterized in that, The acidic pH adjuster is a white powder of superior grade NaHSO4.

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