A method for polishing and anti-oxidation of cathode roller surface based on composite chemical reagents

Abstract

This invention discloses a composite chemical treatment agent for polishing and anti-oxidation of cathode roller surfaces, relating to the field of maintenance technology for electrolytic copper foil production equipment. It comprises the following components: an organic acid complexing agent, a buffer, a surfactant, nano-abrasives, and a hydrolyzable silane. These components are used in a single treatment process to sequentially achieve complexation cleaning, microscopic smoothing, and in-situ formation of an anti-oxidation film on the cathode roller surface oxide layer. A method for polishing and anti-oxidation of the cathode roller surface includes the following steps: S1. Chemical treatment: The cathode roller surface is brought into contact with the composite chemical treatment agent at 40-60°C for 5-30 minutes. In this invention, the organic acid complexing agent and buffer first gently and effectively dissolve the main oxide layer; the dispersed nano-abrasives then microscopically shear and smooth the loosened surface, obtaining an ultra-smooth substrate; the hydrolyzable silane gradually condenses on the activated titanium surface, forming a chemically bonded protective film.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for electrolytic copper foil production equipment, specifically a method for polishing and anti-oxidation of the cathode roller surface based on composite chemical reagents. Background Technology

[0002] In the electrolytic copper foil production process, the cathode roller, as the carrier for copper ion electrodeposition, has a surface condition that is a core factor determining the quality of the copper foil. Ideally, the cathode roller surface should be highly clean, microscopically smooth, and possess uniform conductivity. However, during long-term operation, a titanium oxide layer inevitably forms on the cathode roller surface, and electrolytic byproducts, organic residues, and other contaminants may become embedded. This leads to increased surface roughness and deterioration of conductivity, resulting in a series of quality problems in the produced copper foil, such as pinholes, penetration points, uneven gloss, and even thickness fluctuations. Therefore, periodic polishing and regeneration of the cathode roller surface is a necessary step to ensure copper foil quality and maintain stable production.

[0003] Currently, the industry mainly relies on two types of technologies for the maintenance of cathode rollers: mechanical polishing and chemical cleaning, but both have limitations to varying degrees. Mainstream mechanical polishing techniques, such as offline dry or wet grinding using polishing brushes or grinding wheels, have the advantage of quickly removing macroscopic oxide layers and uneven areas. However, this method also has significant drawbacks: First, purely mechanical action is insufficient to thoroughly clean stubborn contaminants within microscopic grooves, cracks, and other defects on the surface, easily creating cleaning dead zones; second, direct mechanical contact between the abrasive and the roller surface carries the risk of damaging the titanium substrate, and over-polishing can shorten the lifespan of the cathode roller; third, this method typically generates dust or requires the use of polishing fluid, potentially causing environmental pollution or increasing the burden of post-processing.

[0004] To overcome the drawbacks of mechanical methods, chemical polishing technology has emerged. This type of technology removes the oxide layer through the dissolution and complexation effects of chemical reagents, theoretically being gentler on the substrate and better able to handle microscopic areas. For example, patent CN109097779B discloses a chemical polishing slurry using chloroacetic acid as the main agent, disodium ethylenediaminetetraacetate as a complexation promoter, and a surfactant. This method achieves surface regeneration through chemical dissolution, avoiding mechanical damage. However, its technical solution focuses on cleaning and does not address the immediate secondary oxidation problem caused by the extremely high chemical activity of the fresh titanium surface after cleaning. If the surface cannot be put into production immediately after cleaning, the roller surface exposed to air will quickly re-oxidize, significantly reducing the cleaning effect. Furthermore, for some non-oxidized embedded hard contaminants, the removal efficiency of purely chemical methods is sometimes insufficient.

[0005] Therefore, the existing technologies have the following problems that need to be solved: (1) Mechanical and chemical methods are single in function and it is difficult to take into account deep cleaning, micro-level smoothing and substrate protection; (2) Chemical methods or chemical-mechanical combination methods generally lack the ability to provide immediate antioxidant protection for highly active surfaces after treatment, resulting in unsustainable maintenance effects; Therefore, developing an integrated technology that can simultaneously achieve efficient polishing and immediate and long-term antioxidant protection in a single treatment process is of great significance for improving the maintenance quality of cathode rollers, extending the maintenance cycle, simplifying the operation process and reducing production costs. Summary of the Invention

[0006] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a composite chemical treatment agent and method for polishing and anti-oxidation of cathode roller surfaces, thereby solving the problems mentioned in the background art, such as the difficulty of achieving deep cleaning, microscopic smoothing, and immediate protection in a single process, as well as the cumbersome process and unsustainable maintenance effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution: On one hand, the present invention provides a composite chemical treatment agent for polishing and anti-oxidation of the cathode roller surface. The innovation of this treatment agent lies in the specific compatibility of its components, which aims to induce a sequential functional release process of complexation cleaning-nano-smoothing-in-situ film formation.

[0008] Specifically, the composite chemical treatment agent of the present invention comprises the following functional components: an organic acid complexing agent, a buffer, a surfactant, nano-abrasives, and a hydrolyzable silane. The sequential function is manifested as follows: in the initial stage of treatment, the organic acid complexing agent, under the regulation of the buffer, preferentially undergoes a complexation reaction with surface oxides, achieving primary cleaning; simultaneously, the nano-abrasives, under the action of fluid, perform microscopic mechanical leveling of the loosened surface; as cleaning progresses, the fresh surface of the titanium substrate is exposed, and the hydrolyzable silane hydrolyzes at the interface and forms chemical bonds with it, gradually forming a protective film covering the surface in the later stage of treatment. The surfactant ensures the wetting and penetration of each component onto the complex surface throughout the process. This sequential functional design based on differences in reaction kinetics is the key mechanism for achieving an integrated treatment effect.

[0009] Preferably, the pH value of the composite chemical treatment agent is 3.0-5.0, more preferably 3.5-4.5. This pH range ensures the effectiveness of the organic acid complexing agent and the buffer system, achieving gentle and controllable cleaning, while also providing a suitable reaction environment for the hydrolysis and condensation of hydrolyzable silanes. It is one of the key parameters to ensure the sequential synergistic effect.

[0010] Preferably, the concentration ranges of each component are optimized to ensure maximum synergistic effect over time. Organic acid complexing agents (10-50 g / L) and buffers (10-40 g / L) need to be at concentrations sufficient to provide effective and controllable cleaning power; nano-abrasives (1-20 g / L) – too low a concentration will result in insufficient smoothing, while too high a concentration may lead to dispersion difficulties or uneconomical costs; hydrolyzable silanes (1-30 g / L) need to ensure the formation of a continuous, dense protective film while avoiding excessive self-polymerization in the bulk phase; surfactants (0.5-10 g / L) are preferably selected to ensure sufficient wetting without generating excessive foam.

[0011] Preferably, the organic acid complexing agent is at least one of oxalic acid, aminotrimethylene phosphonic acid (ATMP), and hydroxyethylidene diphosphonic acid (HEDP). These organic acids or organophosphonic acid molecules contain multiple coordinating groups (carboxyl or phosphonic acid groups), exhibiting strong complexing ability towards titanium ions, effectively dissolving titanium oxides. Furthermore, their acidity is moderate, and the reaction is mild, which is beneficial for protecting the titanium roller substrate. Compared to strong inorganic acids, their complexing and dissolution mechanism is more selective, resulting in a lower risk of excessive corrosion to the substrate.

[0012] The buffer is preferably sodium oxalate, potassium oxalate, aminotrimethylene phosphonate, or hydroxyethylidene diphosphonate. When the organic acid complexing agent is oxalic acid, its corresponding sodium oxalate or potassium oxalate is the preferred buffer; when the organic acid complexing agent is aminotrimethylene phosphonate or hydroxyethylidene diphosphonate, its corresponding salt is also suitable. The organic acid and its corresponding salt can form a highly efficient buffer system. For example, when the main complexing agent is oxalic acid, its corresponding sodium oxalate is the preferred buffer. This buffer can stabilize the pH value of the treatment solution, allowing the entire treatment process to be carried out in a relatively constant weakly acidic environment. This brings multiple technical benefits: first, it inhibits the excessive ionization of organic acids, controls the complexation reaction rate, prevents excessively rapid reactions leading to localized over-corrosion, and achieves gentle polishing; second, it provides a common ion effect, balances the reaction equilibrium, and makes the cleaning process more uniform and controllable; third, salts such as sodium oxalate can also provide complexing anions, which can produce a synergistic complexing effect with organic acids, enhancing the cleaning ability.

[0013] Preferably, the nanoabrasive is a hydrophilic inorganic oxide sol with an average particle size of 10-100 nm, such as silica, alumina, or cerium oxide sol. Its mechanism of action is the introduction of a chemical mechanical polishing (CMP) effect. The nanoparticles are uniformly dispersed in the treatment solution under the action of a surfactant. While the surface layer is softened and loosened through chemical complexation, the nanoparticles also assist in the removal of stubborn contaminants and the shearing of microscopic protrusions through their minute mechanical friction, thereby achieving ultra-fine surface smoothing. This compensates for the shortcomings of purely chemical methods in microscopic morphology modification, laying the foundation for the subsequent formation of a uniform protective film. The concentration of the nanoabrasive is based on the mass of its effective component, i.e., the oxide solid. Excessive particle size poses a risk of scratching, while excessively small particle size results in weak mechanical action.

[0014] Preferably, the hydrolyzable silane is an epoxysilane containing epoxy groups, such as 3-glycidyl etheroxypropyltrimethoxysilane (GPTMS); or an alkoxysilane containing an amino group, such as γ-aminopropyltriethoxysilane. These silanes are the core components for achieving in-situ antioxidant function. In a weakly acidic aqueous phase, the alkoxy groups gradually hydrolyze to generate silanols. When the titanium surface is cleaned and exposed to a large number of fresh hydroxyl groups, the silanols undergo a condensation reaction with the titanium hydroxyl groups, forming strong Ti-O-Si covalent bonds. Simultaneously, the silanol molecules also condense and crosslink with each other, constructing a dense organic-inorganic hybrid siloxane network film on the titanium surface. This film effectively blocks oxygen and moisture, giving the treated surface immediate antioxidant capacity. Silanes containing reactive epoxy groups or amino groups exhibit better film-forming activity and film density.

[0015] Preferably, the surfactant is a nonionic surfactant, such as fatty acid methyl ester ethoxylate (FMEE) or alkyl alcohol polyoxyethylene ether. Nonionic surfactants have good chemical stability and are less affected by solution pH and electrolytes. They can significantly reduce the surface tension of the treatment solution, allowing it to fully wet and penetrate the microscopic grooves, cracks, and other defect areas on the cathode roller surface, ensuring that all active components act uniformly on the entire surface to be treated, eliminating cleaning dead zones. Simultaneously, it can disperse the reaction products and detached particles in the solution, preventing them from redepositing onto the cleaned surface.

[0016] On the other hand, the present invention provides a method for polishing and anti-oxidation of the cathode roller surface using the above-mentioned composite chemical treatment agent. This method includes two core steps: chemical treatment S1 and S1a for removing excess treatment liquid and curing to form a film S2. The purpose of step S1 is not merely simple immersion, but to provide the necessary reaction conditions for achieving the sequential synergistic effect described in claim 1. Treatment at 40-60°C for 5-30 minutes is optimized: a suitable temperature accelerates the kinetics of the complexation reaction and silane hydrolysis, ensuring that the initial cleaning and film formation processes are completed within the specified time; too short a time results in insufficient functionality, while too long a time may lead to over-reaction or low efficiency.

[0017] S1a. Remove excess treatment liquid: Drain or rotate the cathode roller surface treated by S1 to remove excess treatment liquid.

[0018] The hot air drying and curing step S2 is a key innovation deeply integrated with the function of the treatment agent. Using a hot air stream of 50-80℃ for curing, instead of the conventional water washing followed by air drying or high-temperature baking, serves specific purposes: firstly, it avoids the water washing step damaging the incompletely condensed and cured silane protective layer precursor; secondly, the gentle heat provides additional activation energy for the condensation reaction between silanol and the hydroxyl groups on the titanium surface, as well as for further cross-linking of the siloxane network, promoting the formation of the protective film and improving its density and bonding strength; thirdly, this method offers rapid drying, which improves process efficiency. This method is a necessary process guarantee to ensure the realization of the final technical effect of in-situ formation of an anti-oxidation film.

[0019] Preferably, the S1 chemical treatment can be carried out by conventional but effective methods such as immersion or spraying; removing excess treatment liquid before curing into a film can be achieved by low-speed rotation or tilting to drain, which helps to obtain a protective film with a more uniform thickness and reduces the energy consumption of hot air curing.

[0020] Preferably, the hot airflow temperature is 60-70°C, and the roller surface is swept at an angle of 30°-60°. This temperature range strikes a balance between promoting the condensation reaction and avoiding thermal degradation of the silane film. Sharp-angle sweeping helps to more effectively remove liquid film and volatile substances and makes heat exchange more uniform, thereby obtaining a protective film with consistent performance.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves integrated and sequential synergy between polishing and protection, significantly improving processing efficiency and overall effectiveness. Through a sophisticated component combination, this invention integrates complexation cleaning, nanoscale chemical mechanical polishing, and in-situ condensation film formation into a single chemical treatment system. Utilizing the differences in reaction kinetics among the components, they work sequentially and synergistically during the treatment process. Organic acid complexing agents and buffers first gently and effectively dissolve the main oxide layer; then, dispersed nano-abrasives microscopically shear and level the loosened surface, obtaining an ultra-smooth substrate; simultaneously, hydrolyzable silanes gradually condense on the activated titanium surface, forming a chemically bonded protective film. This one-stop, sequential treatment integrates traditional multi-step processes into a single step, greatly simplifying the operation process, reducing equipment investment and space occupation, and more importantly, eliminating waiting and transfer links between processes. It avoids post-treatment surface exposure to air for oxidation, allowing for seamless integration of efficient polishing and immediate protection. Ultimately, this results in a superior surface with excellent cleanliness, smoothness, and anti-oxidation properties, with processing efficiency and overall effectiveness far exceeding existing technologies that employ step-by-step methods.

[0022] 2. This invention provides the cathode roller surface with immediate and long-lasting antioxidant protection, significantly extending the maintenance cycle. This invention introduces hydrolyzable silanes as in-situ film-forming agents and matches them with a key waterless hot air curing process. The surface treated by this invention is not exposed active titanium, but is covered with a dense organic-inorganic hybrid siloxane film firmly bonded by Ti-O-Si covalent bonds. This film effectively blocks the erosion of the substrate by oxygen and water molecules, allowing the treated cathode roller to maintain a low oxidation state during storage, even if it is not immediately put into production. The surface impedance value increases by several orders of magnitude after treatment, exhibiting excellent corrosion resistance; even after accelerated aging, its hydrophobicity and protective performance degradation rate is very low. This solves the problem of existing technologies where the treated surface looks new after washing but becomes old after storage, significantly extending the effective maintenance cycle of the cathode roller, reducing frequent downtime for maintenance, improving equipment utilization and production continuity, and resulting in significant economic benefits.

[0023] 3. The process of this invention is mild, controllable, and environmentally friendly. This invention uses organic acid / phosphonic acid as the main complexing agent, combined with its corresponding salt to form a buffer system, ensuring the entire chemical treatment process takes place in a stable, weakly acidic environment with a uniform and controllable reaction rate. This guarantees sufficient cleaning and polishing capabilities while minimizing the risk of over-corrosion of the titanium roller substrate, achieving gentle polishing and protecting the expensive cathode roller. Furthermore, the entire system is a water-based solution, and post-treatment uses hot air curing, avoiding the use of highly corrosive acids, heavy metal catalysts, or the generation of large amounts of complex wastewater, thus reducing safety and environmental risks. The addition of surfactants and nano-abrasives enhances the ability to handle complex microstructures, ensuring uniform results. Therefore, this invention not only excels in technical effectiveness but also surpasses traditional strong acid cleaning or mechanical grinding processes in terms of process safety, substrate protection, and environmental friendliness. Attached Figure Description

[0024] Figure 1 This is a schematic flowchart of a method for polishing and anti-oxidation of the surface of a cathode roller according to the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention. All raw materials used in the examples are commercially available.

[0027] Examples 1-3 and Comparative Examples 1-3: Different treatment agents were prepared according to the formulations shown in Table 1. Among them, nano-SiO2 sol had an average particle size of 30 nm, a solid content of 30%, and used industrial-grade GPTMS and FMEE.

[0028] Preparation method: Under stirring, add the organic acid complexing agent, buffer, surfactant, nano-SiO2 sol (converted to SiO2 mass), and hydrolyzable silane to deionized water in sequence, stir evenly, and finally adjust the pH to 3.5-4.5 with dilute nitric acid or sodium hydroxide solution to obtain the composite chemical treatment agent.

[0029] Table 1: Formulations of treatment agents for examples and comparative examples (unit: g / L, solvent: water)

[0030] Solution: Take several titanium plates of the same specifications and with the same degree of simulated oxidation surface treatment. Perform the following treatment: 1. Pretreatment: degreasing with alkaline solution, washing with water, activation with dilute nitric acid, washing with water, and drying with hot air.

[0031] 2. Chemical treatment: Immerse the titanium plate in the corresponding treatment agent and let it stand in a constant temperature water bath at 50±2℃ for 15 minutes.

[0032] 3. Post-processing: Remove the titanium plate and tilt it to drain for 30 seconds.

[0033] 4. Curing and film formation: Immediately place the titanium plate in a hot air drying oven at 65±2℃ and blow it to cure for 30 minutes. Then remove it and cool it to room temperature.

[0034] In Comparative Example 3, the titanium plate was soaked for 15 minutes, rinsed with plenty of pure water, and then dried with hot air under the same conditions.

[0035] Performance Tests and Results: The treated titanium plates were subjected to the following performance tests, and the results are listed in Table 2.

[0036] 1. Surface roughness Ra (μm): Measured using a white light interferometer to evaluate the polishing effect.

[0037] 2. Water contact angle: Measured using a contact angle meter to assess changes in surface energy and hydrophobicity, indirectly reflecting the formation of the protective film.

[0038] 3. Electrochemical Impedance Spectroscopy (EIS): Tested in 3.5 wt.% NaCl solution. The corrosion resistance is evaluated using the impedance modulus value |Z|0.01 Hz in the low-frequency region (0.01 Hz). The higher the value, the better the protection.

[0039] 4. Simulated secondary oxidation: After placing the treated sample in a constant temperature and humidity (40℃, 75%RH) environment for 24 hours, the surface water contact angle was measured again, the contact angle decay rate (%) was calculated, and the durability of the protective film was evaluated.

[0040] 5. Appearance of subsequent deposited copper foil: Micro-electrolytic copper foil deposition experiments were conducted on the treated titanium plate samples to observe the uniformity of the surface brightness of the deposited copper foil and whether there were any obvious defects.

[0041] Table 2: Performance test results of the examples and comparative examples after processing

[0042] Results Analysis and Summary: Based on the data in Tables 1 and 2, the following conclusions can be drawn, fully demonstrating the superiority of the technical solution of this invention: 1. This invention truly achieves an excellent integrated effect of polishing and anti-oxidation. All three embodiments, while achieving the lowest surface roughness (Ra0.16-0.18μm, excellent polishing effect), exhibited a high water contact angle (75-82°) and a high impedance value (>2E5Ω·cm²), proving that while the surface becomes smooth, a protective film with hydrophobicity and excellent isolation properties was successfully formed in situ.

[0043] 2. Both nano-abrasives and hydrolyzable silanes are essential components for achieving the comprehensive effects of this invention. Comparative Example 1 lacks nano-abrasives, resulting in the highest surface roughness (0.22 μm), indicating insufficient micro-smoothing effect. Simultaneously, its impedance value and contact angle retention rate after aging are lower than those of the examples, suggesting that the film quality and adhesion of silanes on relatively rough surfaces may be affected. Comparative Example 2 lacks hydrolyzable silanes, exhibiting a hydrophilic surface (contact angle 25°) and extremely low impedance (-8E3Ω·cm²), comparable to the untreated sample. It completely lacks anti-oxidation capabilities. Although it has some cleaning effect (Ra 0.19 μm), the treated surface is exposed and highly susceptible to oxidation.

[0044] 3. The hot air curing process of this invention has significant advantages compared to the traditional water washing process. Comparative Example 3 simulates the existing chemical polishing followed by water washing process. Although silane is added to the formulation, the water washing step is likely to wash away most of the uncured silane precursors, resulting in its final performance (contact angle, impedance) being almost indistinguishable from that of Comparative Example 2 without silane, and the anti-oxidation function is lost. This starkly contrasts with the fact that the combination of a specific composite treatment agent and a waterless hot air curing film-forming process is a key and inseparable technical feature of this invention that ensures the protective function is achieved.

[0045] 4. The protective film of the present invention has good durability. After 24 hours of accelerated aging, the contact angle attenuation rate of the sample samples was less than 10%, while the attenuation rate of each comparative sample exceeded 20%, reaching a maximum of 35.7%, indicating that the protective film formed by the present invention has a strong bond, stable performance, and can provide long-term protection.

[0046] In summary, this invention, through the careful design of a composite chemical system comprising organic acid complexing agents, buffers, nano-abrasives, hydrolyzable silanes, and surfactants, coupled with a proprietary hot-air curing process, successfully achieves efficient polishing and immediate, long-lasting anti-oxidation treatment of the cathode roller surface in a single chemical process. The technical effects are significant and the innovation is outstanding.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite chemical treatment agent for polishing and anti-oxidation of cathode roller surfaces, characterized in that, It includes the following components: organic acid complexing agent, buffer, surfactant, nano-abrasive and hydrolyzable silane. The components are used to sequentially achieve complexation cleaning, micro-smoothing and in-situ formation of anti-oxidation film on the oxide layer of the cathode roller surface in a single process.

2. The composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 1, characterized in that: Using water as a solvent, it contains the following components at the following concentrations: Organic acid complexing agent 10-50 g / L; Buffer concentration: 10-40 g / L; Nano-abrasive 1-20g / L; Hydrolyzable silanes 1-30 g / L; Surfactant 0.5-10 g / L; The pH value of the composite chemical treatment agent is 3.0-5.

0.

3. The composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 2, characterized in that: The organic acid complexing agent is at least one of oxalic acid, aminotrimethylene phosphonic acid, and hydroxyethylidene diphosphonic acid.

4. A composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 2 or 3, characterized in that: The buffer is sodium oxalate, potassium oxalate, aminotrimethylene phosphonate, or hydroxyethylidene diphosphonate.

5. The composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 2, characterized in that: The nano-abrasive is a hydrophilic inorganic oxide sol with an average particle size of 10-100 nm, and its concentration is expressed as the mass of oxide solids.

6. The composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 2, characterized in that: The hydrolyzable silane is an alkoxysilane containing an epoxy group or an amino group.

7. The composite chemical treatment agent for polishing and anti-oxidation of cathode roller surface according to claim 2, characterized in that: The surfactant is a nonionic surfactant.

8. A method for polishing and anti-oxidation of the surface of a cathode roller, characterized in that, The composite chemical treatment agent for polishing and anti-oxidation of the cathode roller surface as described in any one of claims 1 to 7 is used, and the process includes the following steps in sequence: S1. Chemical treatment: The surface of the cathode roller is brought into contact with the composite chemical treatment agent at 40-60°C for 5-30 minutes; S1a. Remove excess treatment liquid: Drain or rotate the cathode roller surface treated by S1 to remove excess treatment liquid; S2. Curing into a film: Without washing with water, the surface of the cathode roller treated with S1a is placed in a hot airflow at 50-80℃ for drying and curing.

9. A method for polishing and anti-oxidation of the surface of a cathode roller according to claim 8, characterized in that, In step S1, the contact reaction is carried out by immersion or spraying.

10. A method for polishing and anti-oxidation of the surface of a cathode roller according to claim 8, characterized in that, In step S2, the temperature of the hot airflow is 60-70°C, and the blowing direction is at an angle of 30°-60° to the roller surface.

Images