A surface nano-polishing process for a titanium heating plate

Abstract

The present application belongs to the technical field of polishing, and specifically discloses a nano-polishing process for the surface of a titanium heating plate. The nano-polishing process for the surface of a titanium heating plate comprises the following steps: placing a workpiece in a polishing liquid, the polishing liquid temperature is 50-55°C, and electrochemical polishing is performed using a constant voltage. The voltage is controlled at 20-30V, and the power-on time is 5-10min. After the electrochemical polishing is completed, the workpiece is taken out, washed with water, and dried with nitrogen; the polishing liquid includes polishing salt and deionized water, and the polishing salt includes the following components: ammonium sulfate, sodium citrate, glucose, and citric acid. The various components in this application cooperate to remove metal ion impurities on the surface of the workpiece to obtain a smoother and more uniform polished surface.

Description

Technical Field

[0001] The present application relates to the technical field of polishing, and in particular to a nano-polishing process for the surface of a titanium heating plate. Background Art

[0002] Polishing is the process of finishing a surface, such as a workpiece, to achieve a highly polished finish. Polishing removes minor surface irregularities, achieving a highly smooth surface and enhancing light reflection, thereby improving both the aesthetics and performance of the product.

[0003] There are many different polishing methods, including mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, and fluid polishing. Currently, due to the hard surface of titanium heating plates, physical polishing is difficult to remove the surface oxide layer. Imported hard emery cloth is usually used for polishing, but emery cloth polishing is inefficient and produces large sparks, posing a significant fire risk during production.

[0004] Electrochemical polishing is a processing method based on the principle of electrochemical dissolution of metal anodes, which gradually makes the metal surface reach microscopic flatness, so that the surface of the titanium heating plate can achieve a mirror effect, significantly improving the surface finish. The polishing process is relatively simple, and it is easy to control the polishing thickness and polishing speed. The polished finish and flatness are better than mechanical polishing.

[0005] The prior art discloses a titanium alloy polishing liquid containing perchloric acid, sodium perchlorate, lactic acid, and anhydrous ethanol. When this polishing liquid is used for polishing, a high-hardness oxide film is easily generated on the surface of the titanium alloy substrate, which increases the difficulty of polishing. During the polishing process, polishing lines are easily generated on the surface of the titanium alloy, making it difficult to achieve a mirror effect. Summary of the Invention

[0006] In order to improve the problem that polishing lines are easily generated on the surface of titanium alloy substrates treated with polishing liquid and it is difficult to achieve a mirror effect, the present application provides a nano-polishing process for the surface of titanium heating plates.

[0007] This application provides a nano-polishing process for the surface of a titanium heating plate, which adopts the following technical solutions:

[0008] A nano-polishing process for the surface of a titanium heating plate comprises the following steps: placing a workpiece in a polishing liquid at a temperature of 50-55°C, performing electrochemical polishing at a constant voltage of 20-30V, and applying power for 5-10 minutes. After the electrochemical polishing is completed, the workpiece is removed, washed with water, and dried with nitrogen.

[0009] The polishing liquid comprises polishing salt and deionized water. The polishing salt comprises the following components in the following mass percentages: 30-40% ammonium sulfate, 28-32% sodium citrate, 7-13% glucose and 22-28% citric acid.

[0010] By adopting the above technical solution, ammonium sulfate in the polishing liquid primarily improves the working environment and reduces the emission of nitrogen oxides during polishing, thereby reducing health hazards to operators. Sodium citrate has excellent complexing and buffering properties, helping to stabilize the pH value of the polishing liquid and prevent pH changes from affecting the polishing effect during the polishing process. Sodium citrate can also act as a chelating agent to remove metal ion impurities from the workpiece surface, further improving polishing quality. Glucose in the polishing liquid plays a polishing auxiliary role, and its addition helps to achieve a smoother and more uniform polished surface. In addition, glucose also affects the polishing effect by increasing the viscosity of the polishing liquid or improving the dispersion of polishing particles.

[0011] Citric acid is an organic acid with excellent complexing and chelating properties. In the polishing fluid, citric acid can remove oxides and impurities from the workpiece surface, promoting the polishing reaction. Citric acid can also adjust the pH value of the polishing fluid to keep it within an appropriate range, thereby ensuring the stability of the polishing effect. In addition, citric acid can also act as a reducing agent, participating in the redox reaction during the polishing process, helping to achieve a brighter polished surface. When ammonium sulfate, sodium citrate, glucose, and citric acid are mixed as a polishing fluid for titanium heating plates, each plays a different role, and together they achieve a highly efficient polishing effect.

[0012] Set the polishing liquid temperature, polishing voltage and polishing time to ensure uniform polishing. Rinse with running water to ensure that the workpiece surface is clean. Use nitrogen to blow dry the workpiece to avoid residual water stains. Ensure that nitrogen is blown evenly to avoid local over-drying or over-wetting.

[0013] Preferably, the polishing salt comprises the following components in the following mass percentages: 35% ammonium sulfate, 30% sodium citrate, 10% glucose and 25% citric acid.

[0014] By adopting this technical solution and further limiting the dosage of each polishing salt component, the resulting polishing solution exhibits superior overall effectiveness. The components are mixed in the aforementioned proportions to ensure consistent and stable polishing results. Through precise ingredient ratios and strict operating conditions, efficient polishing of workpiece surfaces can be achieved. Ammonium sulfate, with its excellent electrochemical properties and polishing effectiveness, helps regulate the pH value of the polishing solution and stabilize the polishing process. Furthermore, ammonium sulfate positively impacts the surface quality of the polished workpiece, such as improving gloss and flatness.

[0015] Sodium citrate forms stable complexes with metal ions, helping to remove metal oxides and impurities from the workpiece surface. It also regulates the pH of the polishing solution, ensuring a stable polishing effect. Glucose helps improve the viscosity and dispersibility of the polishing solution, thereby affecting the polishing effect and achieving a smoother, more uniform polished surface. Citric acid has excellent complexing and chelating properties, removing oxides and impurities from the workpiece surface and promoting the polishing reaction. It also works synergistically with ammonium sulfate to regulate the pH and electrochemical properties of the polishing solution.

[0016] Preferably, the workpiece is pretreated before being placed in the polishing liquid, comprising the following steps: soaking the workpiece in an acid solution for 30-35 minutes, then washing with water, then ultrasonically cleaning the workpiece in a cleaning solution for 1-2 hours, then washing with ethanol, and drying to obtain a pretreated workpiece;

[0017] The cleaning solution comprises the following components: sodium hydroxide, sodium gluconate, sodium borate, sodium edetate, modified xanthan gum, octylphenol polyoxyethylene ether, modified acrylic resin, triethanolamine oleate soap, polydimethylsilane and deionized water.

[0018] Using this technical solution, the workpiece is immersed in an acid solution to remove oxide layers, rust, or other metal contaminants from the workpiece's surface. The workpiece is then placed in a cleaning solution and cleaned using ultrasound. Ultrasonic cleaning uses microscopic bubbles generated by high-frequency sound waves to impact and remove dirt and residue from the workpiece's surface. The workpiece is further rinsed with ethanol to remove grease, oil residue, and other organic contaminants that cannot be completely removed by water, resulting in a pretreated workpiece.

[0019] In the cleaning solution, sodium hydroxide can remove grease, dirt and oxide layers on the surface of the titanium heating plate, improving the cleanliness of the surface. Sodium gluconate has excellent chelating effect and can form stable complexes with metal ions to remove metal ions and other impurities on the surface of the titanium heating plate. It also has a certain corrosion inhibition effect, protecting the titanium material from corrosion. Sodium borate acts as a buffer in the cleaning solution, stabilizing the pH value of the cleaning solution, removing stains on the surface of the titanium heating plate, and improving the cleaning effect. Sodium ethylenediaminetetraacetic acid has a strong chelating ability and can form stable complexes with metal ions, removing metal oxides and other corrosion products on the surface to prevent re-corrosion.

[0020] Modified xanthan gum acts as a thickener in the cleaning solution, regulating the system's adhesion, helping to remove impurities from the titanium heating plate's surface. It also maintains the stability of the cleaning solution and enhances cleaning effectiveness. Octylphenol polyoxyethylene ether possesses excellent emulsifying and dispersing capabilities, quickly forming a stable emulsion. It effectively emulsifies and disperses grease and oil, effectively removing oil and impurities from the titanium heating plate's surface. Modified acrylic resin improves the cleaning solution's wettability and adhesion, helping the detergent penetrate even the smallest indentations and crevices on the titanium heating plate's surface, enhancing cleaning effectiveness.

[0021] Triethanolamine oleic acid soap has excellent emulsifying and dispersing abilities and rust-proof properties, removing grease, oil, and other impurities from the surface and forming a protective film on the metal surface to prevent corrosion and oxidation. Polydimethylsilane, with its high chemical stability and inertness, acts as a lubricant and disperser, helping the cleaning agent to better penetrate the surface of the titanium heating plate and improve cleaning efficiency. The various components in the cleaning solution work together on the surface of the titanium heating plate, removing grease, dirt, oxides, and other impurities, improving the surface cleanliness and gloss. At the same time, the components work synergistically to maintain the stability and effectiveness of the cleaning solution.

[0022] Preferably, the cleaning solution comprises the following components in parts by weight: 6-9 parts of sodium hydroxide, 30-35 parts of sodium gluconate, 3-5 parts of sodium borate, 15-18 parts of sodium edetate, 3-5 parts of modified xanthan gum, 5-8 parts of octylphenol polyoxyethylene ether, 6-8 parts of modified acrylic resin, 2-5 parts of triethanolamine oleate soap, 1-3 parts of polydimethylsilane, and 350-380 parts of deionized water.

[0023] By adopting the above technical solution, the dosage range of each component in the cleaning solution is further limited, and the components cooperate with each other, so that the cleaning solution obtained has a better cleaning effect. Sodium hydroxide can effectively remove grease, dirt and mild oxide layers on the surface of the titanium heating plate, increase the pH value of the cleaning solution, and help other active ingredients to play a role. Sodium gluconate forms a stable complex with metal ions to prevent the ions from redepositing on the surface of the titanium heating plate during the cleaning process, enhance the cleaning effect, and make dirt easier to rinse off. Sodium borate stabilizes the pH value of the cleaning solution to prevent the cleaning effect from being affected by pH fluctuations. Sodium ethylenediaminetetraacetic acid further ensures that metal ions will not redeposit on the surface of the titanium heating plate, which helps to remove oxides and other impurities that are difficult to clean.

[0024] Modified xanthan gum increases the viscosity of the cleaning solution, making it easier to apply and adhere to the surface of the titanium heating plate, preventing the cleaning solution from stratifying or settling during use. Octylphenol polyoxyethylene ether has excellent emulsifying and dispersing capabilities, emulsifying pollutants such as grease and oil into tiny particles, dispersing them in the cleaning solution for easy rinsing. Modified acrylic resin improves the uniformity and thoroughness of cleaning, improving the wettability and adhesion of the cleaning solution, and ensuring that the cleaning agent can better penetrate the tiny depressions and gaps on the surface of the titanium heating plate. Triethanolamine oleic acid soap has excellent emulsifying and dispersing capabilities and rust-proof properties, forming a protective layer during the cleaning process to prevent corrosion and oxidation on the surface of the titanium heating plate.

[0025] Polydimethylsiloxane improves the dispersibility and permeability of the cleaning agent on the surface, accelerates the cleaning process, and changes the energy state of the titanium heating plate surface, making it easier to separate dirt from the surface. Through the synergistic effect of various components, this cleaning solution can effectively remove grease, dirt, oxides and other impurities on the surface of the titanium heating plate, while protecting the titanium material from corrosion and oxidation.

[0026] Preferably, the preparation method of the modified xanthan gum comprises the following steps: dispersing the xanthan gum in deionized water, stirring at 70-75°C for 1-2 hours, adding potassium hydroxide, adjusting the pH value to 10-11, then adding polysorbate and saccharin, stirring at 80-85°C for 50-55 minutes, filtering, washing with anhydrous ethanol, and drying to obtain the modified xanthan gum.

[0027] By employing the above technical solution, dispersing xanthan gum in deionized water helps reduce agglomeration during subsequent stirring, ensuring that the xanthan gum is fully dissolved and forms a uniform aqueous solution. Adjusting the pH of the solution to 10-11 facilitates the dispersion and dissolution of the xanthan gum in water, improving its solubility and dispersibility.

[0028] The addition of polysorbate and saccharin, with its excellent emulsifying, dispersing, and solubilizing properties, further reduces the surface tension of the system, making it easier for xanthan gum molecules to disperse in water, thereby improving its solubility and dispersibility. Saccharin not only promotes the dissolution of xanthan gum but also increases its viscosity and consistency, forming a tighter network structure with the xanthan gum, thereby increasing the viscosity of the system.

[0029] The modified xanthan gum is subsequently used in the cleaning of titanium heating plates, which not only increases the viscosity of the liquid, helps the cleaning liquid to better adhere to the surface of the titanium heating plate and improve the cleaning effect; but also the stability of the modified xanthan gum can prevent the cleaning liquid from stratification or precipitation during use, ensuring the uniformity and stability of the cleaning liquid.

[0030] Preferably, the mass ratio of the xanthan gum, polysorbate and saccharin is 1:0.1-0.3:0.6-0.8.

[0031] By adopting the above technical solution, the mass ratio of xanthan gum, polysorbate and saccharin is further limited within a certain range, and the xanthan gum obtained has excellent dispersibility and viscosity. Polysorbate has excellent wetting, dispersion and emulsifying properties, can stabilize the colloidal structure in the xanthan gum alkaline solution, and prevents the aggregation and precipitation of colloidal particles. Saccharin can form a tighter network structure with the xanthan gum, thereby increasing the viscosity of the system. There is a synergistic effect between xanthan gum, polysorbate and saccharin, and subsequent application in the cleaning of the titanium heating plate surface, the wetting and dispersing effect of polysorbate is combined with the suspending effect of xanthan gum, can more effectively remove stains and dirt on the titanium heating plate surface. The stabilizing effect of xanthan gum and the viscosity regulating effect of saccharin can ensure that the cleaning agent maintains stable performance in use, while increasing its adhesion and cleaning effect.

[0032] Preferably, the preparation method of the modified acrylic resin comprises the following steps: dispersing methyl methacrylate in deionized water, stirring at a temperature of 60-65°C for 1-2 hours, adding cellulose nanocrystals and sodium dodecylbenzenesulfonate, stirring at a temperature of 120-130°C for 2-3 hours, drying, and grinding to obtain the modified acrylic resin.

[0033] Using the above technical solution, methyl methacrylate is dispersed in deionized water and stirred thoroughly to ensure uniform dispersion. Cellulose nanocrystals and sodium dodecylbenzenesulfonate are then added. The cellulose nanocrystals provide additional structural strength and stability, while the sodium dodecylbenzenesulfonate acts as a surfactant, helping to improve the wettability and dispersibility of the mixture. The cellulose nanocrystals and sodium dodecylbenzenesulfonate are better integrated into the methyl methacrylate network, forming a cross-linked network structure. The resulting modified acrylic resin exhibits excellent mechanical properties, adhesion, weather resistance, and stability.

[0034] In subsequent applications for cleaning titanium heating plate surfaces, modified acrylic resin can increase the viscosity of the cleaning agent, allowing it to form a more durable coating on the surface of the titanium heating plate, thereby improving cleaning efficiency. Modified acrylic resin has excellent weather resistance and stability, and can maintain stable cleaning performance under various environmental conditions. Modified acrylic resin cleaning agents can effectively remove various stains and dirt on the surface of titanium heating plates, including grease, dust, oxides, etc., and can form a protective film to prevent further corrosion and damage to the titanium heating plate surface.

[0035] Preferably, the mass ratio of the methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate is 1:0.4-0.5:0.1-0.2.

[0036] By employing the above technical solution and further limiting the mass ratio of methyl methacrylate, cellulose nanocrystals, and sodium dodecylbenzenesulfonate to a certain range, the resulting modified methyl methacrylate exhibits excellent overall performance and subsequently demonstrates superior cleaning effectiveness in titanium heating plate surface cleaning. The combination of methyl methacrylate, cellulose nanocrystals, and sodium dodecylbenzenesulfonate exhibits a synergistic effect, forming a cross-linked network structure that improves the mechanical properties, weather resistance, adhesion, and stability of the acrylic resin.

[0037] Modified methyl methacrylate helps dissolve grease and oil stains on the surface of the titanium heating plate, increasing the viscosity and stability of the cleaning solution, thereby improving cleaning effectiveness. It also forms a protective film on the surface of the titanium heating plate to prevent excessive corrosion or damage from the cleaning agent. The methyl methacrylate, cellulose nanocrystals, and sodium dodecylbenzenesulfonate work synergistically in the mixture to achieve a combined cleaning effect. Their combination not only improves cleaning efficiency but also reduces the risk of damage to the titanium heating plate surface.

[0038] Preferably, the acid solution is sulfuric acid, hydrofluoric acid, and deionized water in a mass ratio of 30-35:6-9:100.

[0039] By adopting the above technical solution, the components of the acid solution and the mass ratio between the components are further limited, and the obtained cleaning effect on the surface of the titanium heating plate is better. Sulfuric acid, hydrofluoric acid and deionized water work together in the cleaning process to play a cleaning role. Sulfuric acid and hydrofluoric acid are responsible for chemical reactions to remove stains, while deionized water is responsible for dilution and flushing. Sulfuric acid can react chemically with oxides, dirt, etc. on the surface of the titanium heating plate to generate soluble sulfates, thereby removing them. Sulfuric acid can also increase the acidity of the solution, which helps to enhance the cleaning effect of hydrofluoric acid.

[0040] Hydrofluoric acid removes stubborn stains and oxide layers from the surface of titanium heating plates. Combined with sulfuric acid, hydrofluoric acid penetrates deeper into the stains, accelerating their decomposition and removal. Deionized water, used as a solvent, dilutes the sulfuric acid and hydrofluoric acid to a moderate concentration, ensuring effective cleaning while avoiding excessive corrosion. This acid solution effectively removes stains, oxide layers, and other impurities from the titanium heating plate's surface, restoring its smoothness and thermal conductivity.

[0041] Preferably, the method for preparing the polishing liquid comprises the following steps: uniformly mixing ammonium sulfate, sodium citrate, glucose and citric acid, dispersing the mixture in deionized water, and stirring for 2-3 hours to obtain the polishing liquid.

[0042] By adopting the above technical solution, the raw materials are mixed evenly, and the polishing liquid obtained has better stability and polishing performance, which is conducive to the subsequent electrochemical polishing.

[0043] In summary, this application has the following beneficial effects:

[0044] 1. In this application, when ammonium sulfate, sodium citrate, glucose and citric acid are mixed as a polishing liquid for a titanium heating plate, each plays a different role and together achieves an efficient polishing effect. Ammonium sulfate in the polishing liquid mainly plays the role of improving the working environment and improving the escape of nitrogen oxides during polishing, thereby reducing the health hazards to operators.

[0045] 2. In this application, glucose plays an auxiliary polishing role in the polishing liquid. The addition of glucose helps to obtain a smoother and more uniform polishing surface. Glucose also affects the polishing effect by increasing the viscosity of the polishing liquid or improving the dispersibility of the polishing particles.

[0046] 3. In this application, the polishing liquid temperature, polishing voltage and polishing time are set to ensure uniform polishing. Use running water to rinse to ensure that the workpiece surface is clean. Use nitrogen to blow dry the workpiece to avoid water stains. Ensure that nitrogen is blown evenly to avoid local over-drying or over-wetting. DETAILED DESCRIPTION

[0047] The present application is further described in detail below with reference to the embodiments.

[0048] The raw materials used in the examples and comparative examples can all be obtained commercially.

[0049] Preparation example of modified xanthan gum

[0050] Preparation Example 1-1

[0051] The preparation method of modified xanthan gum comprises the following steps: dispersing 10 kg of xanthan gum in 15 L of deionized water, stirring at 75° C. for 1.5 hours, adding potassium hydroxide, adjusting the pH value to 11, adding polysorbate and saccharin, stirring at 85° C. for 55 minutes, filtering, washing with anhydrous ethanol, and drying to obtain modified xanthan gum.

[0052] The mass ratio of xanthan gum, polysorbate and saccharin is 1:0.3:0.8.

[0053] Preparation Example 1-2

[0054] The difference from Preparation Example 1-1 is that polysorbate is not added.

[0055] Preparation Examples 1-3

[0056] The difference from Preparation Example 1-1 is that saccharin is not added.

[0057] Preparation Examples 1-4

[0058] The difference from Preparation Example 1-1 is that the mass ratio of xanthan gum, polysorbate and saccharin is 1:0.1:0.6.

[0059] Preparation Examples 1-5

[0060] The difference from Preparation Example 1-1 is that the mass ratio of xanthan gum, polysorbate and saccharin is 1:0.05:1.2.

[0061] Preparation example of modified acrylic resin

[0062] Preparation Example 2-1

[0063] The preparation method of the modified acrylic resin comprises the following steps: dispersing 12 kg of methyl methacrylate in 20 L of deionized water, stirring at 65° C. for 2 hours, adding cellulose nanocrystals and sodium dodecylbenzenesulfonate, stirring at 130° C. for 3 hours, drying, and grinding to obtain the modified acrylic resin.

[0064] The mass ratio of methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate is 1:0.4:0.1.

[0065] Preparation Example 2-2

[0066] The difference from Preparation Example 2-1 is that no cellulose nanocrystals are added.

[0067] Preparation Example 2-3

[0068] The difference from Preparation Example 2-1 is that sodium dodecylbenzenesulfonate is not added.

[0069] Preparation Example 2-4

[0070] The difference from Preparation Example 2-1 is that the mass ratio of methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate is 1:0.5:0.2.

[0071] Preparation Example 2-5

[0072] The difference from Preparation Example 2-1 is that the mass ratio of methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate is 1:0.1:0.6.

[0073] Example

[0074] Example 1

[0075] A titanium heating plate surface nano-polishing process comprises the following steps: placing a titanium heating plate workpiece with a diameter of 20 cm in a polishing liquid at a temperature of 52° C., performing electrochemical polishing at a constant voltage of 25 V for 8 minutes, and removing the workpiece after the electrochemical polishing is completed, washing it with water, and drying it with nitrogen;

[0076] The polishing liquid includes 5 kg of polishing salt and 100 kg of deionized water. The polishing salt includes the following components in the following mass percentages: 35% of ammonium sulfate, 30% of sodium citrate, 10% of glucose and 25% of citric acid.

[0077] During electrolytic polishing, the titanium heating plate workpiece is placed in the polishing tank, and the conductive beam is fixed to a movable anode conductive seat. The titanium heating plate workpiece serves as the anode, and the stainless steel serves as the cathode, with a distance of 5 cm between the cathode and the cathode. During polishing, a circulating pump is used to stir the electrolyte.

[0078] The preparation method of the polishing liquid comprises the following steps: uniformly mixing ammonium sulfate, sodium citrate, glucose and citric acid, dispersing the mixture in deionized water, and stirring for 3 hours to obtain the polishing liquid.

[0079] Example 2

[0080] A titanium heating plate surface nano-polishing process, which differs from Example 1 in that it comprises the following steps: placing the titanium heating plate workpiece in a polishing liquid at a temperature of 55° C., performing electrochemical polishing at a constant voltage of 20 V for 10 minutes, and after the electrochemical polishing is completed, removing the workpiece, washing it with water, and drying it with nitrogen;

[0081] The polishing liquid includes 5 kg of polishing salt and 100 kg of deionized water. The polishing salt includes the following components in the following mass percentages: 31% of ammonium sulfate, 28% of sodium citrate, 13% of glucose and 28% of citric acid.

[0082] Example 3

[0083] A titanium heating plate surface nano-polishing process, which differs from Example 1 in that it comprises the following steps: placing the titanium heating plate workpiece in a polishing liquid at a temperature of 50° C., performing electrochemical polishing at a constant voltage, controlling the voltage at 30 V, and applying power for 5 minutes; after the electrochemical polishing is completed, removing the workpiece, washing it with water, and drying it with nitrogen;

[0084] The polishing liquid includes 8 kg of polishing salt and 100 kg of deionized water. The polishing salt includes the following components in the following mass percentages: 40% of ammonium sulfate, 31% of sodium citrate, 7% of glucose and 22% of citric acid.

[0085] Example 4

[0086] A nano-polishing process for the surface of a titanium heating plate, which differs from Example 1 in that the workpiece is pretreated before being placed in the polishing liquid, comprising the following steps: soaking the workpiece in a 100 kg acid solution for 30 minutes, then washing with water, then ultrasonically cleaning the workpiece in a cleaning solution for 1 hour, washing with ethanol, and drying to obtain a pretreated workpiece;

[0087] The cleaning solution includes the following components by weight: 9 kg of sodium hydroxide, 35 kg of sodium gluconate, 3 kg of sodium borate, 18 kg of sodium edetate, 5 kg of modified xanthan gum, 8 kg of octylphenol polyoxyethylene ether, 8 kg of modified acrylic resin, 2 kg of triethanolamine oleate soap, 3 kg of polydimethylsilane, and 350 kg of deionized water.

[0088] The acid solution is sulfuric acid, hydrofluoric acid, and deionized water in a mass ratio of 30:9:100.

[0089] The modified xanthan gum was prepared according to Preparation Example 1-1, and the modified methyl methacrylate was prepared according to Preparation Example 2-1.

[0090] Example 5

[0091] A nano-polishing process for the surface of a titanium heating plate, which differs from Example 4 in that the workpiece is pretreated before being placed in the polishing solution, comprising the following steps: soaking the workpiece in an acid solution for 35 minutes, then washing with water, then ultrasonically cleaning the workpiece in a cleaning solution for 2 hours, washing with ethanol, and drying to obtain a pretreated workpiece;

[0092] The cleaning solution includes the following components by weight: 6 kg of sodium hydroxide, 30 kg of sodium gluconate, 5 kg of sodium borate, 15 kg of sodium edetate, 3 kg of modified xanthan gum, 5 kg of octylphenol polyoxyethylene ether, 6 kg of modified acrylic resin, 5 kg of triethanolamine oleate soap, 1 kg of polydimethylsilane, and 380 kg of deionized water.

[0093] The acid solution is sulfuric acid, hydrofluoric acid, and deionized water in a mass ratio of 35:6:100.

[0094] Example 6

[0095] A nano-polishing process for the surface of a titanium heating plate is different from Example 4 in that the modified xanthan gum is prepared using Preparation Example 1-2.

[0096] Example 7

[0097] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified xanthan gum is prepared using Preparation Examples 1-3.

[0098] Example 8

[0099] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified xanthan gum is prepared using Preparation Examples 1-4.

[0100] Example 9

[0101] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified xanthan gum is prepared using Preparation Examples 1-5.

[0102] Example 10

[0103] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified methyl methacrylate is prepared using Preparation Example 2-2.

[0104] Example 11

[0105] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified methyl methacrylate is prepared using Preparation Example 2-3.

[0106] Example 12

[0107] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified methyl methacrylate is prepared using Preparation Examples 2-4.

[0108] Example 13

[0109] A nano-polishing process for the surface of a titanium heating plate is disclosed, which differs from Example 1 in that the modified methyl methacrylate is prepared using Preparation Examples 2-5.

[0110] Comparative Example

[0111] Comparative Example 1

[0112] A nano-polishing process for the surface of a titanium heating plate, which differs from Example 1 in that ammonium sulfate is not added.

[0113] Comparative Example 2

[0114] A nano-polishing process for the surface of a titanium heating plate, which differs from Example 1 in that no glucose is added.

[0115] Performance testing

[0116] The high-efficiency heat-resistant and scald-proof paper cups prepared in Examples 1-13 and Comparative Examples 1-2 were subjected to performance tests;

[0117] Glossiness: The glossiness of the surface of each polished steel plate was tested using a micro gloss meter A-4430 (BYK, Germany).

[0118] Workpiece appearance: Observe the surface of each workpiece with the naked eye. If the workpiece surface appearance is uniform, without any discoloration and snowflakes, it is scored 8-10 points; if the workpiece surface appearance is uniform with slight color difference and slight snowflakes, it is scored 6-8 points; if the workpiece surface appearance is uniform with partial color difference and partial snowflakes, it is scored 4-6 points; if the workpiece surface appearance is uneven, with large color difference and large snowflakes, it is scored 0-4 points.

[0119] Roughness: tested using a surface roughness tester.

[0120] Stability: The percentage of the workpiece surface that remains smooth and spot-free after 48 hours of storage, and the area of rust spots to the total area; the test results are shown in Table 1.

[0121] Table 1 Test data of embodiments and comparative examples

[0122]

[0123] As can be seen from Table 1, the titanium heating plate obtained by the nano-polishing process for the titanium heating plate surface in Examples 1-3 of the present application has excellent overall performance. Among them, the glossiness of Example 1 is 57gu, the appearance score is 8.2 points, the roughness Ra is 0.356μm, and the stability performance is 88%. This shows that the polishing liquid prepared in this application has a good polishing effect. When ammonium sulfate, sodium citrate, glucose, and citric acid are mixed as the polishing liquid for the titanium heating plate, each plays a different role and together achieves an efficient polishing effect.

[0124] Comparative Examples 1-2, in which neither ammonium sulfate nor glucose was added, show significant deterioration in gloss, appearance score, roughness, and stability compared to Examples 1-3, as shown in Table 1. This demonstrates that ammonium sulfate has excellent electrochemical properties and polishing effects, helping to adjust the pH of the polishing solution, stabilize the polishing process, and improve the surface gloss and flatness of the polished workpiece. The addition of glucose contributes to a smoother, more uniform polished surface, impacting the polishing effect by increasing the viscosity of the polishing solution or improving the dispersion of the polishing particles.

[0125] In Examples 4 and 5, the workpiece was pretreated before being placed in the polishing solution. As can be seen in Table 1, the gloss, appearance score, roughness, and stability test results were significantly improved. In Example 4, the gloss was 68gu, the appearance score was 9.6, the roughness Ra was 0.231μm, and the stability was 98%. This indicates that the pretreatment further cleans the surface of the titanium heating plate, and the synergistic effect of the components maintains the stability and cleaning effect of the cleaning solution.

[0126] The preparation method of embodiment 6-7 modified xanthan gum does not add polysorbate and saccharin respectively, and embodiment 8-9 changes the mass ratio of xanthan gum, polysorbate and saccharin. As can be seen from Table 1, the glossiness, appearance score, roughness and stability test effect of embodiment 6-7 are obviously worse than embodiment 4-5, and the corresponding performance test effect of embodiment 9 is all better than embodiment 6-7, but worse than embodiment 4-5 and embodiment 8, shows that polysorbate has excellent wetting, dispersion and emulsification properties, can stabilize the colloidal structure in the xanthan gum alkaline solution, prevents the aggregation and precipitation of colloidal particles. Saccharin can form a tighter network structure with xanthan gum, thereby increases the viscosity of the system. There is synergistic effect between xanthan gum, polysorbate and saccharin, and subsequent application is in the cleaning of titanium heating plate surface. The wetting and dispersion of polysorbate are combined with the suspension effect of xanthan gum, and the stain and dirt on the titanium heating plate surface can be more effectively removed.

[0127] The preparation method of modified acrylic resin in Examples 10-11 does not add cellulose nanocrystals and sodium dodecylbenzenesulfonate respectively. Examples 12-13 change the mass ratio of methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate. As can be seen from Table 1, the glossiness, appearance score, roughness and stability test results of Examples 10-11 are significantly worse than those of Examples 4-5. The corresponding performance test results of Example 13 are all better than those of Examples 10-11, but worse than those of Examples 4-5 and Example 12, indicating that the mixture of methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate has a synergistic effect. Methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate can form a cross-linked network structure, thereby improving the mechanical properties, weather resistance, adhesion and stability of acrylic resin. When applied to the surface of a titanium heating plate, methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate work together to play a cleaning role, which not only improves the cleaning efficiency but also reduces the risk of damage to the surface of the titanium heating plate.

[0128] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A nano-polishing process for the surface of a titanium heating plate, characterized in that: The process comprises the following steps: placing a workpiece in a polishing liquid at a temperature of 50-55°C, performing electrochemical polishing at a constant voltage of 20-30V, and applying power for 5-10 minutes. After the electrochemical polishing is completed, the workpiece is removed, washed with water, and dried with nitrogen. The polishing liquid includes polishing salt and deionized water, wherein the polishing salt includes the following components in the following mass percentages: 30-40% ammonium sulfate, 28-32% sodium citrate, 7-13% glucose and 22-28% citric acid; The workpiece is pretreated before being placed in the polishing liquid, comprising the following steps: soaking the workpiece in an acid solution for 30-35 minutes, then washing with water, then ultrasonically cleaning the workpiece in a cleaning solution for 1-2 hours, washing with ethanol, and drying to obtain a pretreated workpiece; The cleaning solution comprises the following components in parts by weight: 6-9 parts of sodium hydroxide, 30-35 parts of sodium gluconate, 3-5 parts of sodium borate, 15-18 parts of sodium edetate, 3-5 parts of modified xanthan gum, 5-8 parts of octylphenol polyoxyethylene ether, 6-8 parts of modified acrylic resin, 2-5 parts of triethanolamine oleate soap, 1-3 parts of polydimethylsilane, and 350-380 parts of deionized water; The preparation method of the modified xanthan gum comprises the following steps: dispersing the xanthan gum in deionized water, stirring at 70-75°C for 1-2 hours, adding potassium hydroxide, adjusting the pH value to 10-11, then adding polysorbate and saccharin, stirring at 80-85°C for 50-55 minutes, filtering, washing with anhydrous ethanol, and drying to obtain the modified xanthan gum.

2. The nano-polishing process for the surface of a titanium heating plate according to claim 1, characterized in that: The polishing salt comprises the following components in the following mass percentages: 35% ammonium sulfate, 30% sodium citrate, 10% glucose and 25% citric acid.

3. The nano-polishing process for the surface of a titanium heating plate according to claim 1, characterized in that: The mass ratio of the xanthan gum, polysorbate and saccharin is 1:0.1-0.3:0.6-0.

8.

4. The nano-polishing process for the surface of a titanium heating plate according to claim 1, characterized in that: The preparation method of the modified acrylic resin comprises the following steps: dispersing methyl methacrylate in deionized water, stirring at a temperature of 60-65°C for 1-2 hours, adding cellulose nanocrystals and sodium dodecylbenzenesulfonate, stirring at a temperature of 120-130°C for 2-3 hours, drying, and grinding to obtain the modified acrylic resin.

5. The nano-polishing process for the surface of a titanium heating plate according to claim 4, characterized in that: The mass ratio of the methyl methacrylate, cellulose nanocrystals and sodium dodecylbenzenesulfonate is 1:0.4-0.5:0.1-0.

2.

6. The nano-polishing process for the surface of a titanium heating plate according to claim 1, characterized in that: The acid solution is composed of sulfuric acid, hydrofluoric acid and deionized water in a mass ratio of 30-35:6-9:

100.

7. The nano-polishing process for the surface of a titanium heating plate according to claim 1, characterized in that: The preparation method of the polishing liquid comprises the following steps: uniformly mixing ammonium sulfate, sodium citrate, glucose and citric acid, dispersing the mixture in deionized water, and stirring for 2-3 hours to obtain the polishing liquid.

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