A method for the rapid preparation of a micromilled protective strippable coating

Abstract

This invention discloses a method for rapid micro-scale preparation of a chemical milling protective peelable coating. The method includes weighing all materials in the chemical milling protective peelable coating, controlling the total mass to be between 50g and 500g; loading all materials into a corrosion-resistant, high-strength, pressure-resistant wide-mouth container; adding grinding balls to the container, and then sealing the container after adding the grinding balls, with the grinding balls filling 30% to 50% of the total mass of all raw materials; sealing the container with a corrosion-resistant and pressure-resistant cap; fixing the sealed wide-mouth container onto the fixture of a three-dimensional shaker; setting the shaker frequency to 500-800 rpm and the grinding time to 30-60 minutes; the forward and reverse rotation switching cycle of the three-dimensional shaker being 3-5 minutes; after grinding, samples can be directly taken for particle size analysis and viscosity testing, allowing for preliminary performance evaluation without transfer. This method significantly shortens the preparation cycle to within 1 hour, and the entire process is conducted in a closed system, effectively reducing solvent evaporation and environmental pollution, lowering R&D costs, doubling efficiency, and simultaneously meeting the requirements of chemical milling process specifications.

Description

Technical Field

[0001] This invention relates to the field of polymer composite materials and protective coating manufacturing technology, specifically to a method for rapid preparation of chemically milled protective peelable coatings in micro-volumes. Background Technology

[0002] Chemical milling (CMM) is a machining technique that uses a chemical solution to etch the surface of a metal substrate. This technology utilizes the concentration and etching time of the chemical solution to precisely remove metal from predetermined areas, resulting in large-size, high-precision products that meet technical requirements. CMM is highly efficient, low-cost, and the most mature machining method, offering advantages such as no tool wear, no cutting stress in the finished product, and good fatigue performance. Currently, CMM has become an irreplaceable key machining technology for most parts.

[0003] Chemical milling protective peelable coatings have advantages such as multiple construction methods, low coating loss, and simple operation. They are widely used in chemical milling of aluminum alloys, titanium alloys, and stainless steel, as well as temporary protection for anodizing and electroplating of aluminum alloys and etching of complex art pieces. They can also be used for chemical corrosion protection of coated surfaces, or as temporary protection for instrument surfaces and mechanical equipment to prevent scratches and abrasions.

[0004] Currently, traditional chemical milling protective peelable coatings are produced using large planetary mixers, sand mills, or three-roll mills, with material input typically ranging from several kilograms to several hundred kilograms. However, when conducting formula screening and product optimization in laboratories, these large-scale equipment or small mixers are still used, which leads to the following problems during the research and development process: 1. Significant material waste: The use of large-scale equipment for formula experiments requires the consumption of several kilograms of expensive abrasives (such as diamond, alumina, and cerium oxide) and chemical additives each time, resulting in high research and development costs; 2. Poor environmental performance: Traditional mixing and grinding equipment is a semi-enclosed structure, which cannot effectively prevent solvent evaporation during the production process. Solvent evaporation not only pollutes the environment but also increases the solid content in the coating, affecting its performance and workability. To adjust to the appropriate solid content and viscosity, additional solvent must be added later, which not only increases raw material consumption and costs but may also create a vicious cycle of "evaporation-replenishment," further exacerbating environmental pollution and resource waste.

[0005] 3. Cumbersome cleaning and maintenance: Large grinding equipment has many dead corners, and cleaning after each experiment is time-consuming and labor-intensive, and it is very easy to cause cross-contamination between different formulas.

[0006] 4. Low efficiency: The loading, unloading and cleaning time of the equipment often exceeds the actual grinding time, which seriously slows down the formula iteration speed. Each piece of equipment can only carry out the next batch of production operation after completing a single batch of production and going through cleaning and preparation procedures.

[0007] 5. Poor dispersion effect: Small batches of materials are prone to "climbing the rod" or "stirring dead corners" in large equipment, resulting in uneven dispersion. Therefore, grinding often needs to be carried out for 2 hours or even longer to meet the actual use requirements.

[0008] Therefore, it is of great significance to invent a method for rapid preparation of chemical milling protective peelable coatings in small quantities without affecting other properties of the coatings. Summary of the Invention

[0009] The present invention aims to solve the technical problems of high R&D cost, poor environmental performance, cumbersome equipment cleaning and maintenance, long R&D cycle and poor dispersion effect of the chemical milling protective peelable coating formulation in the above-mentioned prior art.

[0010] The present invention provides a method for rapid preparation of a chemically treated peelable protective coating in small quantities, comprising the following steps: 1. Micro-weighing: Weigh all materials (including resin, pigments, fillers, additives and solvents) of the chemical milling protective peelable coating according to the preset formula ratio, and control the total mass between 50g and 500g; 2. Filling the container: Fill all the above materials into a corrosion-resistant, high-strength, pressure-resistant wide-mouth container; 3. Add grinding balls: Add grinding balls to the container described above, and then seal the pressure-resistant wide-mouth container. The filling mass of the grinding balls should be 30% to 50% of the total mass of all raw materials. Seal the container with a corrosion-resistant and pressure-resistant cap. 4. High-energy oscillation grinding: Fix the sealed wide-mouth container onto the fixture of the three-dimensional shaker; 5. Parameter control: Start the equipment, set the shaking frequency to 500~800 rpm, and the grinding time to 30~60 minutes; the forward and reverse rotation switching cycle of the three-dimensional shaking mixer is 3min~5min; 6. Sampling and testing: After grinding, remove the container, open the cap, and take samples directly for particle size analysis and viscosity testing. Preliminary performance evaluation can be performed without transferring the samples.

[0011] The pressure-resistant wide-mouth container includes a wide-mouth container body and a sealing cap. The volume of the wide-mouth container body is 250mL~1000mL. The wide-mouth container body is made of a corrosion-resistant material, which is one or a combination of polytetrafluoroethylene (PTFE), polycarbonate (PC), or glass. The sealing cap is equipped with a corrosion-resistant seal, preventing solvent leakage under vibration conditions. During the grinding process, the temperature inside the pressure-resistant wide-mouth container does not exceed 40℃. When the temperature exceeds 40℃, the equipment automatically stops and grinding resumes after the temperature drops below 30℃. The grinding balls are made of one or more combinations of zirconia balls, corundum balls, and glass balls. The grinding balls are arranged in different diameter gradations, with a single grinding ball diameter of 1mm to 10mm. The mass of the grinding balls accounts for 30% to 50% of the amount of peelable chemical milling protective coating material. Specifically, grinding balls with a diameter of 1mm to 5mm account for 60% to 80% of the total mass of the grinding balls, and grinding balls with a diameter of 6mm to 10mm account for 20% to 40%.

[0012] The three-dimensional shaker features forward and reverse rotation, enabling three-dimensional tumbling and impact of materials within the container. It can accommodate 8-20 sealed, pressure-resistant wide-mouth containers at a time. Utilizing the forward and reverse tumbling design, the grinding balls generate high-frequency impact and shearing action on the materials. Combined with a high oscillation frequency of 500-800 rpm, the target fineness can be achieved in just 30-60 minutes, increasing grinding efficiency by 3-8 times. Exceeding this parameter range will result in negative effects such as a sharp drop in dispersion efficiency, pigment agglomeration, and excessive solvent evaporation. Furthermore, a single unit can simultaneously accommodate 8-20 sealed containers, supporting simultaneous grinding of multiple formulations and batches of samples. It is particularly suitable for the needs of multiple comparative experiments during the formulation development stage, significantly shortening the formulation optimization cycle.

[0013] The peelable chemical milling protective coating is any one of solvent-based chemical milling protective coating, solvent-free chemical milling protective coating, or two-component chemical milling protective coating.

[0014] Single-container end-to-end operation: Material weighing, filling, grinding, and testing are all completed within a single sealed, pressure-resistant, wide-mouth container, eliminating the need for intermediate material transfer, reducing container wall adhesion losses, and achieving a material recovery rate close to 100%. This is particularly suitable for preparing micro-scale formulations of 50-500g, avoiding losses during multi-step material transfers that could distort the formulation ratio. The sealed container completely blocks the evaporation of organic solvents, reducing VOC emissions during preparation and meeting the operational safety requirements of strong solvent systems such as xylene and ketones commonly used in chemical milling protective coatings. The container can be made of PTFE, PC, or glass, resisting corrosion from additives and solvents in the coating and eliminating the risk of impurity precipitation. Furthermore, key parameters such as the grinding ball filling ratio (30%~50% of material mass), ball diameter range (1~10mm), oscillation frequency, and grinding time are clearly defined and can be flexibly adjusted according to the formulation viscosity and pigment / filler hardness, ensuring that the grinding fineness and viscosity deviation between different batches of samples is less than 5%, with data reproducibility far exceeding that of traditional manual operations. After grinding, samples can be directly taken for particle size and viscosity testing without the need for cooling or tank transfer, avoiding performance test deviations caused by material temperature changes and solvent evaporation. It provides rapid feedback on grinding results, facilitating parameter adjustments. The three-dimensional oscillating grinding mode offers excellent dispersion for both low-viscosity solvent-based coatings and high-viscosity elastomer-based systems (such as SBS and neoprene rubber-based coatings). It avoids the efficiency drops that occur with traditional sand mills when processing high-viscosity materials and the tendency for three-roll mills to flow when processing low-viscosity materials. No complex equipment cleaning process is required; containers and grinding balls can be directly immersed in solvent for cleaning. Switching between different formulations carries no risk of cross-contamination, making it suitable for laboratory-based multi-category, small-batch coating R&D scenarios, significantly reducing equipment investment and operating costs. Beneficial effects

[0015] Compared with the prior art, the present invention has the following outstanding advantages: 1. Reduced R&D costs: The amount of material fed in a single experiment was reduced from kilograms to 100 grams, which greatly reduced the consumption of expensive abrasives and special chemicals, saved R&D costs, and made high-throughput formulation screening possible.

[0016] 2. Completely eliminate cross-contamination: Use disposable or independent sealed pressure-resistant wide-mouth bottles for grinding. Each formula uses an independent bottle and grinding ball, which fundamentally eliminates residues and cross-contamination between different formulas.

[0017] 3. Green Manufacturing: Because the entire preparation process uses disposable or independent sealed pressure-resistant wide-mouth bottles for grinding, it not only solves the environmental pollution problems of traditional semi-closed stirring and grinding equipment during production, but also reduces the need for subsequent solvent replenishment, further improving overall efficiency. 4. Extremely simple cleaning and maintenance: There is no need to clean the complex sand mill cavity or pipes. Only the pressure-resistant wide-mouth bottle and grinding balls need to be cleaned, or disposable lined wide-mouth bottles can be used directly, saving a lot of cleaning and maintenance time.

[0018] 5. Increased efficiency: Three-dimensional shake mixers can typically hold multiple wide-mouth bottles simultaneously, enabling "parallel experiments." Multiple different formulas can be tested in a single run, significantly improving R&D efficiency.

[0019] 6. Excellent dispersion effect: High-energy ball milling combined with three-dimensional tumbling can provide sufficient shear force and impact force, enabling micron- or nano-sized abrasives to rapidly deagglomerate and uniformly disperse in micro-scale systems.

[0020] 7. Meets the requirements of chemical milling process specifications: This invention not only solves the technical problems of high R&D cost, cumbersome equipment cleaning and maintenance, long R&D cycle and poor dispersion effect in the chemical milling protective peelable coating formulation during the experimental process, but also ensures that the chemical milling protective peelable coating prepared by this invention has the same performance as the coating prepared by large grinding equipment, and all technical indicators and parameters meet the technical process requirements of chemical milling protective peelable coating. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0022] Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, according to the chemical milling protective peelable coating formula. Add these to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 36g of zirconia grinding balls with a diameter of 3mm and 9g of a diameter of 6mm (filling rate 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0023] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0024] Example 2: Micro-preparation of protective peelable coatings by chemical milling Weigh out 154g of solvent, 26g of base resin, 18g of pigments and fillers, and 2g of additives, totaling 200g, according to the chemical milling protective peelable coating formula. Add these to a 400ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 50g of 5mm diameter and 20g of 8mm diameter zirconia grinding balls (filling rate 35%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 700 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0025] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0026] Comparative Example 1: Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, according to the chemical milling protective peelable coating formula. Add these to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 45g of zirconia grinding balls with a diameter of 3mm and 9g of a diameter of 6mm (filling rate of 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker without automatic forward and reverse switching. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0027] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0028] Conclusion of Comparative Example 1: The test results of Comparative Example 1 show that when the three-dimensional mixer does not have an automatic forward and reverse switching function, the fineness of the prepared chemical milling protective peelable coating exceeds the standard, the engraving has burrs and expansion tearing, and there are many bubbles in the paint film, resulting in poor density. The alkali resistance and acid resistance cannot meet the technical requirements of chemical milling protective coating. Comparative Example 2

[0029] Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, according to the chemical milling protective peelable coating formula. Add these to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 45g of zirconia grinding balls with a diameter of 3mm and 9g of a diameter of 6mm (filling rate of 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching for 4 minutes. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0030] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0031] Conclusion of Comparative Example 2: The test results of Comparative Example 2 show that when the automatic switching frequency of the forward and reverse directions of the three-dimensional shaker exceeds 3 minutes, the alkali resistance, straightness of the chemical milling protective peelable coating and the etching ratio of the prepared coating cannot meet the technical requirements of the chemical milling protective coating under the same grinding time. Comparative Example 3

[0032] Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives according to the chemical milling protective peelable coating formula. Add 100g of these ingredients to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 45g of zirconia grinding balls with a diameter of 3mm (filling rate of 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0033] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0034] Conclusion of Comparative Example 3: The test results of Comparative Example 3 show that when the grinding balls are of a certain size, the fineness of the prepared chemical milling protective peelable coating is slightly excessive under the same grinding time, and the density and alkali resistance cannot meet the technical requirements of the chemical milling protective coating. Comparative Example 4

[0035] Micro-preparation of protective peelable coatings by chemical milling According to the formulation of the chemical milling protective peelable coating, weigh 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, and add them to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 36g of zirconia grinding balls with a diameter of 3mm and 9g of a diameter of 6mm (filling rate of 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 490 rpm and grind for 60 minutes. When the pressure-resistant wide-mouth bottle is removed and the slurry is filtered, it is found that the filler agglomerates.

[0036] Conclusion of Comparative Example 4: The test results of Comparative Example 4 show that when the rotation speed of the three-dimensional shaker is less than 500 rpm, the packing material agglomerates under the same grinding time. Comparative Example 5

[0037] Micro-preparation of protective peelable coatings by chemical milling According to the formulation of the chemical milling protective peelable coating, weigh 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, and add them to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 36g of zirconia grinding balls with a diameter of 3mm and 9g of a diameter of 6mm (filling rate of 45%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 810 rpm and grind for 60 minutes. When the pressure-resistant wide-mouth bottle is removed and the slurry is filtered, it is found that the filler agglomerates.

[0038] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0039] Conclusion of Comparative Example 5: The test results of Comparative Example 5 show that when the rotation speed of the three-dimensional shaker is greater than 800 rpm, the etching ratio of the chemical milling protective peelable coating cannot meet the technical requirements under the same grinding time. Comparative Example 6

[0040] Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, according to the chemical milling protective peelable coating formula. Add these to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 16g of zirconia grinding balls with a diameter of 3mm and 4g of a diameter of 6mm (filling rate of 20%). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0041] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0042] Conclusion of Comparative Example 6: The test results of Comparative Example 6 show that when the filling rate of the grinding balls is less than 30%, the fineness, pattern, density, acid resistance, alkali resistance, chemical milling straightness, and etching ratio of the chemical milling protective peelable coating cannot meet the technical requirements under the same grinding time. Comparative Example 7

[0043] Micro-preparation of protective peelable coatings by chemical milling Weigh out 77g of solvent, 13g of base resin, 9g of pigments and fillers, and 1g of additives, totaling 100g, according to the chemical milling protective peelable coating formula. Add these to a 200ml pressure-resistant wide-mouth bottle (with a silicone sealing cap). Then add 48g of 3mm diameter and 12g of 6mm diameter zirconia grinding balls (60% filling rate). After tightening the sealing cap, fix the bottle to the fixture of a three-dimensional shaker with automatic forward and reverse switching every 3 minutes. Set the speed to 600 rpm and grind for 60 minutes. After grinding, remove the pressure-resistant wide-mouth bottle, filter the slurry, and package it as the finished product.

[0044] Conclusion of Comparative Example 7: The test results of Comparative Example 7 show that when the filling rate of the grinding balls is greater than 50%, the filler agglomerates under the same grinding time. Comparative Example 8

[0045] Preparation of chemical milling protective peelable coating (1) Chemical milling protects peelable coating material dissolution Add 3080g of solvent to a 5L mixing tank, add 520g of base resin under high-speed stirring (650rpm), stir for 20min until the resin is completely dissolved, then add 360g of pigments and fillers and 40g of additives in sequence, continue stirring under high-speed stirring for 30min until the materials are evenly mixed, then stop stirring and remove the mixing tank. The cleaning of the high-speed stirring equipment takes about 20min.

[0046] (2) Grinding of protective peelable coating materials by chemical milling The evenly dispersed slurry was ground in a 5L basket mill at a speed of 1100 rpm. After 2 hours of grinding, the fineness was measured to be 39 μm. Grinding was then stopped and the material was discharged. The cleaning of the grinding equipment took about 30 minutes.

[0047] (3) Adjusting the viscosity of peelable coating for chemical milling protection The viscosity and solids content of the milled protective peelable coating were tested. The solids content was 28.02% and the viscosity was 34 seconds. By adding 690g of solvent multiple times, the viscosity of the coating was diluted to 16 seconds and the solids content was 23.42%. The viscosity adjustment of the milled protective peelable coating took about 1 hour.

[0048] Performance testing of chemical milling protective peelable coatings The prepared chemical milling protective peelable coating was subjected to performance tests, and the test results are shown in the table below:

[0049] Conclusion of Comparative Example 8: As can be seen from Comparative Example 8, compared to micro-scale preparation of chemical milling protective peelable coatings, traditional chemical milling protective peelable coatings involve cumbersome preparation steps, with solvents evaporating during the production process polluting the environment and a production time exceeding 4 hours, during which viscosity adjustment is also required. In contrast, this invention, through optimized formulation and process, compresses the preparation cycle to within 1 hour, significantly reducing energy consumption and emissions, and providing more stable batch consistency through precise process control.

[0050] This disclosure has been described with reference to the foregoing embodiments; however, these embodiments are merely examples for implementing this disclosure. It must be noted that the disclosed embodiments do not limit the scope of this disclosure. On the contrary, any changes and modifications made without departing from the spirit and scope of this disclosure are within the scope of patent protection of this disclosure.

Claims

1. A method for rapid preparation of a micro-scale chemical milling protective peelable coating, comprising the following steps: S1 Ingredients: Weigh all the raw materials of the chemical milling protective peelable coating according to the formula ratio, and control the total mass of all raw materials to be 50g~500g; S2 Sealing and Filling: Load all weighed raw materials into a pressure-resistant wide-mouth container, add grinding balls, and then seal the pressure-resistant wide-mouth container. The filling mass of the grinding balls is 30% to 50% of the total mass of all raw materials. Use a corrosion-resistant and pressure-resistant sealing cap for sealing. S3 Three-Dimensional Oscillating Grinding: The sealed pressure-resistant wide-mouth container is fixed in a three-dimensional shaker with forward and reverse rotation functions. The shaking frequency is set to 500rpm~800rpm and the grinding time is 30min~60min. The raw materials are dispersed by impact with the grinding balls through the three-dimensional tumbling of the pressure-resistant wide-mouth container. S4 Testing and Evaluation: After grinding, the pressure-resistant wide-mouth container can be opened directly to take samples, and the particle size and viscosity performance tests can be completed without transferring the materials. The grinding balls are made up of different diameter gradations, with grinding balls of 1-5 mm in diameter accounting for 60%-80% of the total mass of the grinding balls, and grinding balls of 6-10 mm in diameter accounting for 20%-40%.

2. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: In step S3, the forward and reverse switching cycle of the three-dimensional shaking mixer is 3 min to 5 min.

3. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: During the grinding process in step S3, the temperature inside the pressure-resistant wide-mouth container shall not exceed 40°C. When the temperature exceeds 40°C, the equipment shall be automatically stopped and grinding shall be resumed after the temperature drops below 30°C.

4. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: The pressure-resistant wide-mouth container includes a wide-mouth container body and a sealing cap. The volume of the wide-mouth container body is 250mL~1000mL. The wide-mouth container body is made of a corrosion-resistant material, which is one or a combination of polytetrafluoroethylene, polycarbonate or glass. The sealing cap is equipped with a corrosion-resistant sealing element.

5. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: The grinding balls are one or more combinations of zirconia balls, corundum balls, and glass balls.

6. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: The three-dimensional shaker has forward and reverse rotation functions and a multi-station fixture. The multi-station fixture is fixed on the oscillation platform of the three-dimensional shaker, and can simultaneously fix 8 to 20 sealed pressure-resistant wide-mouth containers, realizing the synchronous parallel grinding of multiple sets of different formulas.

7. The method for rapid preparation of chemically treated peelable coatings in micro-volumes according to claim 1, characterized in that: The peelable chemical milling protective coating is any one of solvent-based chemical milling protective coating, solvent-free chemical milling protective coating, or two-component chemical milling protective coating.

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