Coating with good wear resistance and preparation method thereof

Abstract

The invention relates to the technical field of environment-friendly coatings, in particular to a coating with good wear resistance and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of deionized water, 20 to 30 parts of alkyd resin, 15 to 25 parts of waterborne acrylic emulsion, 10 to 20 parts of wear-resistant additive, 5 to 10 parts of molybdenum disulfide micro powder, 1 to 3 parts of dispersing agent, 0.5 to 2 parts of thickening agent and 0.5 to 1 part of defoaming agent. According to the invention, the nickel-based metal glass micro powder provides rigid support by an amorphous structure, a polar interface is formed after a surface oxide layer of the nickel-based metal glass micro powder is removed, the nickel-based metal glass micro powder and a resin matrix construct an anti-load framework, magnesium borate whiskers are inserted into gaps of the framework by virtue of needle-shaped structures to form an interlocking network, and an amino silane coupling agent forms chemical bond bridging on the surfaces of the whiskers, so that the anti-load performance of the magnesium borate whiskers is improved. After the polytetrafluoroethylene micro powder is pretreated, a lubricating film is formed on the surface of the coating, the friction coefficient is reduced, and high wear resistance of the coating is achieved through linkage of the polytetrafluoroethylene micro powder, the lubricating film and the friction coefficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environment-friendly coating, in particular to a coating with good wear resistance and a preparation method thereof. BACKGROUND

[0002] With the continuous progress of industrial technology and the increasing demand for product performance in various industries, as a widely used protective and decorative material, the performance of coating is facing more severe challenges. Among the many coating performances, wear resistance is crucial, as it is directly related to the service life, maintenance cost and overall performance of the coated object.

[0003] In the prior art, the widely used wear-resistant coating is mainly epoxy coating system and polyurethane coating system, but it has defects such as large friction coefficient and poor corrosion resistance. Therefore, the present application provides a coating with good wear resistance and a preparation method thereof. SUMMARY

[0004] The purpose of the present application is to provide a coating with good wear resistance and a preparation method thereof. The coating prepared by the present application not only has good wear resistance, but also has excellent corrosion resistance, effectively improving the performance of the coating.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a coating with good wear resistance, comprising the following raw materials by weight: 30-40 parts of deionized water, 20-30 parts of alkyd resin, 15-25 parts of water-based acrylic emulsion, 10-20 parts of wear-resistant additive, 5-10 parts of molybdenum disulfide powder, 1-3 parts of dispersing agent, 0.5-2 parts of thickening agent and 0.5-1 part of defoaming agent. The wear-resistant additive is prepared by mixing the pretreated nickel-based metal glass powder, magnesium borate whiskers and polytetrafluoroethylene powder in a mass ratio of 5:3:2.

[0006] Preferably, the pretreatment step of the nickel-based metal glass powder is as follows: immerse the nickel-based metal glass powder in 5-10% dilute hydrochloric acid, stir at 50-100 r / min at room temperature by a magnetic stirrer for 15-30 min, wash with 5% sodium carbonate solution for 2-3 times, place in an ultrasonic cleaner, set the power to 200-300 W, ultrasonic treatment for 10-15 min, take out and place in a vacuum drying oven, set the temperature to 80-100℃ and dry for 2-4 hours to ensure that the water content is less than 0.5%, add the first dried powder and the first treatment liquid to a glass beaker, place in a water bath, set the temperature to 60-80℃, and stir at 50-100 r / min by a magnetic stirrer for 1-2 h, take out, wash with anhydrous ethanol for 2-3 times, and place in a vacuum drying oven, set the temperature to 100-120℃ and dry for 1-2 h to complete the pretreatment of the nickel-based metal glass powder.

[0007] Preferably, the first treatment solution is prepared by dissolving silane coupling agent KH-560 in a first decomposition solution at a ratio of 1-3% and mixing them. The first decomposition solution is prepared by mixing ethanol and water at a volume ratio of 9:1. The solid-liquid ratio of the dried micro powder and the first treatment solution is 1:5-6.

[0008] Preferably, the pretreatment step of the magnesium borate whiskers is as follows: Magnesium borate whiskers are placed in a muffle furnace and calcined at 500-600℃ for 1-2 hours. After cooling, they are placed in a planetary ball mill at a ball-to-material ratio of 10:1, and anhydrous ethanol is added. The milling is then carried out at 100-200 r / min for 30-60 min. After washing with deionized water 3-5 times, the whiskers are placed in a vacuum drying oven and dried at 80-100℃ for 2-4 hours to obtain dried whiskers. The dried whiskers are then mixed with nitric acid solution... Add the solution to a glass container and stir with a magnetic stirrer at 50-100 rpm for 30-40 min to obtain acidified whiskers. Add the acidified whiskers and the first treatment solution to a glass beaker, place it in a water bath, set the temperature to 60-80℃, and stir with a magnetic stirrer at 50-100 rpm for 1-2 h. Remove the beaker and wash it 2-3 times with anhydrous ethanol, then place it in a vacuum drying oven and dry it at 100-120℃ for 1-2 h to complete the pretreatment of magnesium borate whiskers.

[0009] Preferably, the concentration of the nitric acid solution is 3-5%, and the solid-liquid ratio of the acidified whiskers to the first treatment solution is 1:8-10.

[0010] Preferably, the pretreatment steps of the polytetrafluoroethylene (PTFE) micro powder are as follows: immerse the PTFE micro powder in a treatment solution, treat it at 0-10℃ using a magnetic stirrer at 50-100 r / min for 5-10 min, remove it and wash it alternately with anhydrous ethanol and deionized water 3-5 times, let it stand at room temperature for 30 min, and then dry it in a drying oven at 60-70℃ for 1-2 hours to obtain the second dried micro powder. Add the second dried micro powder and the first treatment solution to a glass container at a solid-liquid ratio of 1:6-8, place it in a water bath, set the temperature to 60-80℃, and stir it with a magnetic stirrer at 50-100 r / min for 1-2 h. Remove it and wash it with anhydrous ethanol 2-3 times, and then place it in a vacuum drying oven at 60℃ for 1-2 h to complete the pretreatment of the PTFE micro powder.

[0011] Preferably, the preparation steps of the treatment solution are as follows: tetrahydrofuran and naphthalene are added to a reaction vessel, the temperature is set to 40-50℃, and the mixture is treated with a magnetic stirrer at 500-600 r / min for 10-15 min. Under the condition of continuous introduction of high-purity nitrogen gas and keeping the vessel sealed, sodium metal slices (less than 1 mm) are added in batches at 5 g / min. The mixture is stirred continuously at 500-600 r / min for 20-30 min. After the reaction is completed, the temperature is lowered to 0-10℃, and anhydrous ethanol is added dropwise until no bubbles are generated. After standing and separating into layers, the upper clear liquid is taken to complete the preparation of the treatment solution.

[0012] Preferably, the mass ratio of the sodium metal chips, naphthalene, and tetrahydrofuran is 1:1:10.

[0013] Preferably, the preparation steps of the wear-resistant additive are as follows: adding pretreated nickel-based metal glass micro powder and magnesium borate whiskers to a mixing vessel, stirring with a magnetic stirrer at 800 r / min for 10 min, then adding pretreated polytetrafluoroethylene micro powder, and continuing to stir at 300 r / min for 5 min to complete the preparation of the wear-resistant additive.

[0014] A method for preparing a coating with good wear resistance includes the following steps: Step 1: Add deionized water to the reaction vessel and stir with a magnetic stirrer at 300-500 r / min. Then add alkyd resin and water-based acrylic emulsion in sequence and continue stirring for 10-15 min. Step 2: Add the wear-resistant additive and molybdenum disulfide micro powder to the reaction vessel from Step 1 in sequence, increase the rotation speed to 800-1000 r / min, stir for 20-30 min, then reduce the rotation speed to 300-400 r / min, add the dispersant and defoamer, stir for 10-15 min, then slowly add the thickener, and continue stirring for 5-10 min to obtain the mixture; Step 3: After sieving the mixture through a 200-mesh sieve, let it stand for 30-40 minutes to complete the preparation of the coating.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, nickel-based metallic glass micropowder provides rigid support with an amorphous structure. After acid etching and silane coupling treatment, its surface oxide layer is removed and a polar interface is formed. It forms an anti-load skeleton with the resin matrix through physical adsorption and chemical bonding. Magnesium borate whiskers, with their needle-like structure, interpenetrate in the skeleton gaps to form an interlocking network. After high-temperature calcination to repair lattice defects, chemical bonds are formed on the whisker surface through an aminosilane coupling agent to enhance the interface toughness and guide crack deflection. Modified polytetrafluoroethylene micropowder, after pretreatment, forms a lubricating film on the coating surface to reduce the coefficient of friction. The three work together to achieve high wear resistance of the coating.

[0016] 2. In this invention, the disordered atomic stacking of nickel-based metal glass micropowder eliminates grain boundary corrosion channels. After acid etching and silane coupling treatment, the siloxane protective film formed on the surface further isolates electrolyte penetration. The dense crystal structure formed by magnesium borate whiskers after high-temperature calcination significantly enhances chemical inertness. The needle-like network interspersed in the coating can physically block the diffusion of corrosive media. The chemical bond bridging layer formed by the aminosilane coupling agent on its surface can work with the resin to construct a hydrophobic barrier, enhancing the anti-corrosion performance of the coating. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that all raw materials used in the following experiments are commercially available. The defoamer used is model Tego Foamex 810. The thickener is Rohm and Haas TT-935; The dispersant used is alkyl naphthalene sulfonate.

[0019] Example 1: Weigh the following raw materials as needed: 30 parts deionized water, 20 parts alkyd resin, 15 parts water-based acrylic emulsion, 10 parts wear-resistant additive, 5 parts molybdenum disulfide micro powder, 1 part dispersant, 0.5 parts thickener and 0.5 parts defoamer; The wear-resistant additive is prepared by mixing pretreated nickel-based metallic glass micro powder, magnesium borate whiskers and polytetrafluoroethylene micro powder in a mass ratio of 5:3:2.

[0020] The pretreatment steps for nickel-based metallic glass micropowder are as follows: Immerse the nickel-based metallic glass micropowder in 5-10% dilute hydrochloric acid, stir at room temperature at 50 r / min for 15 min using a magnetic stirrer, wash twice with 5% sodium carbonate solution, place in an ultrasonic cleaner, set the power to 200W, and ultrasonically treat for 10 min. After that, remove it and place it in a vacuum drying oven, set the temperature to 80℃ and dry for 2 hours to ensure that the moisture content is less than 0.5%, thus obtaining the first dried micropowder. Add the first dried micropowder and the first treatment solution to a glass beaker, place it in a water bath, set the temperature to 60℃, and stir with a magnetic stirrer at 50 r / min for 1 h. Remove it and wash twice with anhydrous ethanol, then place it in a vacuum drying oven, set the temperature to 100℃ and dry for 1 h to complete the pretreatment of nickel-based metallic glass micropowder.

[0021] The first treatment solution is prepared by dissolving silane coupling agent KH-560 in the first decomposition solution at a ratio of 1% and mixing them. The first decomposition solution is prepared by mixing ethanol and water at a volume ratio of 9:1. The solid-liquid ratio of the dried micro powder and the first treatment solution is 1:5.

[0022] The pretreatment steps for magnesium borate whiskers are as follows: Magnesium borate whiskers are placed in a muffle furnace and calcined at 500℃ for 1 hour. After cooling, they are placed in a planetary ball mill at a ball-to-material ratio of 10:1, and anhydrous ethanol is added. The mixture is then ground at 100 r / min for 30 minutes. After washing three times with deionized water, the whiskers are placed in a vacuum drying oven and dried at 80℃ for 2 hours to obtain dried whiskers. The dried whiskers and nitric acid solution are added to a glass container and stirred at 50 r / min for 30 minutes with a magnetic stirrer to obtain acidified whiskers. The acidified whiskers and the first treatment solution are added to a glass beaker, placed in a water bath, and stirred at 60℃ with a magnetic stirrer at 50 r / min for 1 hour. After washing twice with anhydrous ethanol, the whiskers are placed in a vacuum drying oven and dried at 100℃ for 1 hour to complete the pretreatment of magnesium borate whiskers.

[0023] The concentration of the nitric acid solution is 3-5%, and the solid-liquid ratio of the acidified whiskers to the first treatment solution is 1:8.

[0024] The pretreatment steps for polytetrafluoroethylene (PTFE) micro powder are as follows: Immerse the PTFE micro powder in the treatment solution and treat it at 0-10℃ with a magnetic stirrer at 50 r / min for 5 min. After removal, wash it three times alternately with anhydrous ethanol and deionized water, let it stand at room temperature for 30 min, and then dry it in a 60℃ drying oven for 1-2 hours to obtain the second dried micro powder. Add the second dried micro powder and the first treatment solution to a glass container at a solid-liquid ratio of 1:6, place it in a water bath, set the temperature to 60℃, and stir it with a magnetic stirrer at 50 r / min for 1 h. After removal, wash it twice with anhydrous ethanol, and then place it in a vacuum drying oven and dry it at 60℃ for 1 h to complete the pretreatment of PTFE micro powder.

[0025] The treatment solution preparation steps are as follows: Tetrahydrofuran and naphthalene are added to the reaction vessel, the temperature is set to 40℃, and the reaction is carried out at 500r / min for 10min using a magnetic stirrer. Under the condition of continuous introduction of high-purity nitrogen and keeping the vessel sealed, sodium metal slices (less than 1mm) are added in batches at 5g / min. The reaction is carried out by continuous stirring at 500r / min for 20min. After the reaction is completed, the temperature is lowered to 0℃, and anhydrous ethanol is added dropwise until no bubbles are generated. After standing and separating into layers, the upper clear liquid is taken to complete the preparation of the treatment solution.

[0026] The mass ratio of sodium metal slices, naphthalene, and tetrahydrofuran was 1:1:10.

[0027] The preparation steps of the wear-resistant additive are as follows: add the pretreated nickel-based metal glass micro powder and magnesium borate whiskers to the mixing vessel, stir with a magnetic stirrer at 800 r / min for 10 min, then add the pretreated polytetrafluoroethylene micro powder, and continue stirring at 300 r / min for 5 min to complete the preparation of the wear-resistant additive.

[0028] A method for preparing a coating with good wear resistance includes the following steps: Step 1: Add deionized water to the reaction vessel and stir at 300 r / min using a magnetic stirrer. Then add alkyd resin and water-based acrylic emulsion in sequence and continue stirring for 10 min. Step 2: Add the wear-resistant additive and molybdenum disulfide micro powder to the reaction vessel in Step 1 in sequence, increase the speed to 800 r / min, stir for 20 min, then reduce the speed to 300 r / min, add the dispersant and defoamer, stir for 10 min, then slowly add the thickener, and continue stirring for 5 min to obtain the mixture; Step 3: After sieving the mixture through a 200-mesh sieve, let it stand for 30 minutes to complete the preparation of the coating.

[0029] Example 2: Weigh the following raw materials as needed: 35 parts deionized water, 25 parts alkyd resin, 15 parts water-based acrylic emulsion, 15 parts wear-resistant additive, 7 parts molybdenum disulfide micro powder, 2 parts dispersant, 1 part thickener and 0.7 parts defoamer; The wear-resistant additive is prepared by mixing pretreated nickel-based metallic glass micro powder, magnesium borate whiskers and polytetrafluoroethylene micro powder in a mass ratio of 5:3:2.

[0030] The pretreatment steps for nickel-based metallic glass micropowder are as follows: Immerse the nickel-based metallic glass micropowder in 5-10% dilute hydrochloric acid, stir at room temperature for 22 minutes at 75 r / min using a magnetic stirrer, wash twice with 5% sodium carbonate solution, place in an ultrasonic cleaner with a power setting of 250W, ultrasonically treat for 12 minutes, remove and place in a vacuum drying oven at 90℃ for 3 hours to ensure a moisture content of less than 0.5%, obtaining the first dried micropowder. Add the first dried micropowder and the first treatment solution to a glass beaker, place in a water bath at 70℃, and stir with a magnetic stirrer at 75 r / min for 1.5 hours. Remove and wash three times with anhydrous ethanol, then place in a vacuum drying oven at 110℃ for 1.5 hours to complete the pretreatment of the nickel-based metallic glass micropowder.

[0031] The first treatment solution is prepared by dissolving silane coupling agent KH-560 in the first decomposition solution at a ratio of 2% and mixing them. The first decomposition solution is prepared by mixing ethanol and water at a volume ratio of 9:1. The solid-liquid ratio of the dried micro powder and the first treatment solution is 1:5.

[0032] The pretreatment steps for magnesium borate whiskers are as follows: Magnesium borate whiskers are placed in a muffle furnace and calcined at 550℃ for 1.5 hours. After cooling, they are placed in a planetary ball mill at a ball-to-material ratio of 10:1, and anhydrous ethanol is added. The milling is carried out at 150 r / min for 45 minutes. After washing with deionized water four times, the whiskers are placed in a vacuum drying oven and dried at 90℃ for 3 hours to obtain dried whiskers. The dried whiskers and nitric acid solution are added to a glass container and stirred with a magnetic stirrer at 72 r / min for 35 minutes to obtain acidified whiskers. The acidified whiskers and the first treatment solution are added to a glass beaker, placed in a water bath, and stirred with a magnetic stirrer at 75 r / min for 1.5 hours. After washing with anhydrous ethanol three times, the whiskers are placed in a vacuum drying oven and dried at 110℃ for 1.5 hours to complete the pretreatment of magnesium borate whiskers.

[0033] The concentration of the nitric acid solution is 4%, and the solid-liquid ratio of the acidified whiskers to the first treatment solution is 1:9.

[0034] The pretreatment steps for polytetrafluoroethylene (PTFE) micro powder are as follows: PTFE micro powder is immersed in a treatment solution and treated at 0-10℃ using a magnetic stirrer at 75 r / min for 7 min. After removal, it is washed four times alternately with anhydrous ethanol and deionized water, then allowed to stand at room temperature for 30 min, and then dried in a 65℃ drying oven for 1.5 hours to obtain the second dried micro powder. The second dried micro powder and the first treatment solution are added to a glass container at a solid-liquid ratio of 1:6-8. The container is then placed in a water bath at 70℃ and stirred at 75 r / min for 1.5 h. After removal, it is washed twice with anhydrous ethanol and then placed in a vacuum drying oven at 60℃ for 1.5 h to complete the pretreatment of PTFE micro powder.

[0035] The treatment solution preparation steps are as follows: Tetrahydrofuran and naphthalene are added to the reaction vessel, the temperature is set to 45℃, and the reaction is carried out at 550r / min for 12min using a magnetic stirrer. Under the condition of continuous introduction of high-purity nitrogen and keeping the vessel sealed, sodium metal slices (less than 1mm) are added in batches at 5g / min. The reaction is carried out by continuous stirring at 550r / min for 25min. After the reaction is completed, the temperature is lowered to 7℃, and anhydrous ethanol is added dropwise until no bubbles are generated. After standing and separating into layers, the upper clear liquid is taken to complete the preparation of the treatment solution.

[0036] The mass ratio of sodium metal slices, naphthalene, and tetrahydrofuran was 1:1:10.

[0037] The preparation steps of the wear-resistant additive are as follows: add the pretreated nickel-based metal glass micro powder and magnesium borate whiskers to the mixing vessel, stir with a magnetic stirrer at 800 r / min for 10 min, then add the pretreated polytetrafluoroethylene micro powder, and continue stirring at 300 r / min for 5 min to complete the preparation of the wear-resistant additive.

[0038] A method for preparing a coating with good wear resistance includes the following steps: Step 1: Add deionized water to the reaction vessel and stir at 400 r / min using a magnetic stirrer. Then add alkyd resin and water-based acrylic emulsion in sequence and continue stirring for 12 min. Step 2: Add the wear-resistant additive and molybdenum disulfide micro powder to the reaction vessel in Step 1 in sequence, increase the speed to 900 r / min, stir for 25 min, then reduce the speed to 350 r / min, add the dispersant and defoamer, stir for 12 min, then slowly add the thickener, and continue stirring for 7.5 min to obtain the mixture; Step 3: After sieving the mixture through a 200-mesh sieve, let it stand for 35 minutes to complete the preparation of the coating.

[0039] Example 3: Weigh the following raw materials as needed: 40 parts deionized water, 30 parts alkyd resin, 25 parts water-based acrylic emulsion, 20 parts wear-resistant additive, 10 parts molybdenum disulfide micro powder, 3 parts dispersant, 2 parts thickener and 1 part defoamer; The wear-resistant additive is prepared by mixing pretreated nickel-based metallic glass micro powder, magnesium borate whiskers and polytetrafluoroethylene micro powder in a mass ratio of 5:3:2.

[0040] The pretreatment steps for nickel-based metallic glass micropowder are as follows: Immerse the nickel-based metallic glass micropowder in 10% dilute hydrochloric acid, stir at 100 r / min at room temperature for 30 min using a magnetic stirrer, wash three times with 5% sodium carbonate solution, place it in an ultrasonic cleaner with a power of 300W, ultrasonically treat for 12 min, remove it and place it in a vacuum drying oven at 00℃ for 4 hours to ensure a moisture content of less than 0.5%, obtaining the first dried micropowder. Add the first dried micropowder and the first treatment solution to a glass beaker, place it in a water bath at 80℃, and stir with a magnetic stirrer at 100 r / min for 2 hours. Remove it and wash three times with anhydrous ethanol, then place it in a vacuum drying oven at 120℃ for 2 hours to complete the pretreatment of the nickel-based metallic glass micropowder.

[0041] The first treatment solution is prepared by dissolving silane coupling agent KH-560 in the first decomposition solution at a ratio of 3% and mixing them. The first decomposition solution is prepared by mixing ethanol and water at a volume ratio of 9:1. The solid-liquid ratio of the dried micro powder and the first treatment solution is 1:6.

[0042] The pretreatment steps for magnesium borate whiskers are as follows: Magnesium borate whiskers are placed in a muffle furnace and calcined at 600℃ for 2 hours. After cooling, they are placed in a planetary ball mill at a ball-to-material ratio of 10:1, and anhydrous ethanol is added. The milling is carried out at 200 r / min for 30-60 minutes. After washing with deionized water 3-5 times, the whiskers are placed in a vacuum drying oven and dried at 100℃ for 4 hours to obtain dried whiskers. The dried whiskers and nitric acid solution are added to a glass container and stirred at 100 r / min for 40 minutes using a magnetic stirrer to obtain acidified whiskers. The acidified whiskers and the first treatment solution are added to a glass beaker, placed in a water bath, and stirred at 80℃ for 2 hours using a magnetic stirrer at 100 r / min. After washing with anhydrous ethanol 3 times, the whiskers are placed in a vacuum drying oven and dried at 120℃ for 2 hours to complete the pretreatment of magnesium borate whiskers.

[0043] The concentration of the nitric acid solution is 3-5%, and the solid-liquid ratio of the acidified whiskers to the first treatment solution is 1:10.

[0044] The pretreatment steps for polytetrafluoroethylene (PTFE) micro powder are as follows: PTFE micro powder is immersed in a treatment solution and treated at 10°C with a magnetic stirrer at 100 r / min for 10 min. After removal, it is washed 5 times alternately with anhydrous ethanol and deionized water, then allowed to stand at room temperature for 30 min, and then dried in a 70°C drying oven for 2 hours to obtain the second dried micro powder. The second dried micro powder and the first treatment solution are added to a glass container at a solid-liquid ratio of 1:8, and then placed in a water bath at 80°C and stirred at 100 r / min for 2 h with a magnetic stirrer. After removal, it is washed 3 times with anhydrous ethanol, and then placed in a vacuum drying oven at 60°C for 2 h to complete the pretreatment of PTFE micro powder.

[0045] The treatment solution preparation steps are as follows: Tetrahydrofuran and naphthalene are added to the reaction vessel, the temperature is set to 50℃, and the reaction is carried out at 600r / min for 15min using a magnetic stirrer. Under the condition of continuous introduction of high-purity nitrogen and keeping the vessel sealed, sodium metal slices (less than 1mm) are added in batches at 5g / min. The reaction is carried out by continuous stirring at 600r / min for 30min. After the reaction is completed, the temperature is lowered to 10℃, and anhydrous ethanol is added dropwise until no bubbles are generated. After standing and separating into layers, the upper clear liquid is taken to complete the preparation of the treatment solution.

[0046] The mass ratio of sodium metal slices, naphthalene, and tetrahydrofuran was 1:1:10.

[0047] The preparation steps of the wear-resistant additive are as follows: add the pretreated nickel-based metal glass micro powder and magnesium borate whiskers to the mixing vessel, stir with a magnetic stirrer at 800 r / min for 10 min, then add the pretreated polytetrafluoroethylene micro powder, and continue stirring at 300 r / min for 5 min to complete the preparation of the wear-resistant additive.

[0048] A method for preparing a coating with good wear resistance includes the following steps: Step 1: Add deionized water to the reaction vessel and stir at 500 r / min using a magnetic stirrer. Then add alkyd resin and water-based acrylic emulsion in sequence and continue stirring for 15 min. Step 2: Add the wear-resistant additive and molybdenum disulfide micro powder to the reaction vessel in Step 1 in sequence, increase the speed to 1000 r / min, stir for 30 min, then reduce the speed to 400 r / min, add the dispersant and defoamer, stir for 15 min, then slowly add the thickener, and continue stirring for 10 min to obtain the mixture; Step 3: After sieving the mixture through a 200-mesh sieve, let it stand for 40 minutes to complete the preparation of the coating.

[0049] Comparative Example 1: The difference between this comparative example and Example 1 is that nickel-based metallic glass powder was not added during the preparation of the wear-resistant additive in this comparative example.

[0050] Comparative Example 2 differs from Example 1 in that magnesium borate whiskers were not added during the preparation of the wear-resistant additive in this comparative example.

[0051] Comparative Example 3 differs from Example 1 in that: no polytetrafluoroethylene micropowder was added during the preparation of the wear-resistant additive in this comparative example.

[0052] Comparative Example 4 differs from Example 1 in that the nickel-based metallic glass micropowder, magnesium borate whiskers, and polytetrafluoroethylene micropowder were pretreated in this comparative example.

[0053] Performance testing: The coatings prepared in Examples 1, 2, 3, 1, 2, 3, and 4 were subjected to performance testing. Friction coefficient test: Using a friction and wear testing machine, the prepared coating is uniformly coated on the surface of a standard metal test piece. After drying and curing, a friction test is conducted with a certain pressure (10N) and linear speed (0.5m / s) against a grinding object (alumina ceramic ball) for 10 minutes. The friction force during the friction process is recorded in real time, and the friction coefficient is calculated (GB / T9271 "Standard Test Plates for Paints and Varnishes"). Falling sand impact abrasion test: The coated specimen is placed horizontally under the falling sand abrasion tester. 20-mesh quartz sand is dropped freely from a height of 50 cm at a flow rate of 500 g / min to impact the specimen surface for 30 minutes. After the test, the mass difference of the specimen before and after abrasion is measured using an electronic balance with an accuracy of 0.0001 g. This difference is used to measure the abrasion resistance of the coating (GB / T23988-2009 "Determination of Abrasion Resistance of Coatings - Falling Sand Method"). Linear wear test: Using a reciprocating wear tester, the coated specimen is fixed on the worktable, and a rubber friction head is used as the wear object. A pressure of 5N is applied, the reciprocating stroke is set to 50mm, the frequency is 30 times / min, and 5000 reciprocating friction tests are carried out. After the test, the wear depth on the surface of the specimen is measured using a high-precision profilometer, and the linear wear amount is calculated by the wear depth and the friction stroke.

[0054] The obtained test data is recorded in the table below:

[0055] By comparing and analyzing the relevant data in the table, it can be seen that the coating prepared by the present invention using a wear-resistant coating and its preparation method not only has good wear resistance but also excellent anti-corrosion properties, effectively improving the coating's performance. This indicates that the wear-resistant coating and its preparation method provided by the present invention have a broader market prospect and are more suitable for widespread application.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A coating having good wear resistance, characterized in that: The following raw materials are included by weight: 30-40 parts of deionized water, 20-30 parts of alkyd resin, 15-25 parts of water-based acrylic emulsion, 10-20 parts of wear-resistant auxiliary agent, 5-10 parts of molybdenum disulfide micro powder, 1-3 parts of dispersing agent, 0.5-2 parts of thickening agent and 0.5-1 part of defoaming agent; The wear-resistant auxiliary agent is prepared by mixing the pretreated nickel-based metal glass micro powder, magnesium borate whisker and polytetrafluoroethylene micro powder according to a mass ratio of 5:3:

2.

2. The paint with good wear resistance according to claim 1, characterized in that, The pretreatment step of the nickel-based metal glass micro powder is as follows: the nickel-based metal glass micro powder is immersed in 5-10% dilute hydrochloric acid, stirred at 50-100 r / min at room temperature by a magnetic stirrer for 15-30 min, washed with 5% sodium carbonate solution for 2-3 times, placed in an ultrasonic cleaner, set at a power of 200-300 W, ultrasonically treated for 10-15 min, taken out and placed in a vacuum drying oven, set at 80-100 DEG C and dried for 2-4 hours to ensure that the water content is less than 0.5%, the first dried micro powder is added to a glass beaker, placed in a water bath, set at a temperature of 60-80 DEG C, stirred at 50-100 r / min by a magnetic stirrer for 1-2 h, taken out, washed with anhydrous ethanol for 2-3 times, placed in a vacuum drying oven, set at 100-120 DEG C and dried for 1-2 h to complete the pretreatment of the nickel-based metal glass micro powder.

3. The paint with good wear resistance according to claim 2, characterized in that, The first treatment solution is prepared by dissolving silane coupling agent KH-560 in a first decomposition solution according to a proportion of 1-3% to obtain the first treatment solution, the first decomposition solution is prepared by mixing ethanol and water according to a volume ratio of 9:1, and the solid-liquid ratio of the dried micro powder and the first treatment solution is 1:5-6.

4. The paint with good wear resistance according to claim 3, characterized in that, The pretreatment step of the magnesium borate whisker is as follows: the magnesium borate whisker is calcined at 500-600 DEG C for 1-2 h in a muffle furnace, taken out after cooling, placed in a planetary ball mill according to a ball-to-material ratio of 10:1, added with anhydrous ethanol, ground at 100-200 r / min for 30-60 min, taken out, washed with deionized water for 3-5 times, placed in a vacuum drying oven, set at 80-100 DEG C and dried for 2-4 hours to obtain dried whisker, the dried whisker and nitric acid solution are added to a glass container, stirred at 50-100 r / min by a magnetic stirrer for 30-40 min to obtain acidified whisker, the acidified whisker and the first treatment solution are added to a glass beaker, placed in a water bath, set at a temperature of 60-80 DEG C, stirred at 50-100 r / min by a magnetic stirrer for 1-2 h, taken out, washed with anhydrous ethanol for 2-3 times, placed in a vacuum drying oven, set at 100-120 DEG C and dried for 1-2 h to complete the pretreatment of the magnesium borate whisker.

5. The paint with good wear resistance according to claim 4, characterized in that, The concentration of the nitric acid solution is 3-5%, and the solid-liquid ratio of the acidified whisker and the first treatment solution is 1:8-10.

6. The paint with good wear resistance according to claim 4, characterized in that, The pretreatment step of the polytetrafluoroethylene micro powder is: immersing the polytetrafluoroethylene micro powder into a treatment solution, treating at 50-100 r / min by a magnetic stirrer at 0-10 DEG C for 5-10 min, washing with anhydrous ethanol and deionized water alternately for 3-5 times after taking out, standing at room temperature for 30 min, and drying in a drying oven at 60-70 DEG C for 1-2 hours to obtain second dried micro powder, adding the second dried micro powder and the first treatment solution into a glass container according to a solid-liquid ratio of 1:6-8, setting the temperature at 60-80 DEG C in a water bath, and stirring at 50-100 r / min by a magnetic stirrer for 1-2 h, washing with anhydrous ethanol for 2-3 times after taking out, and setting 60 DEG C in a vacuum drying oven for 1-2 h to complete the pretreatment of the polytetrafluoroethylene micro powder.

7. The paint with good wear resistance according to claim 6, characterized in that, The preparation step of the treatment solution is: adding tetrahydrofuran and naphthalene into a reaction kettle, setting the temperature at 40-50 DEG C, and treating at 500-600 r / min by a magnetic stirrer for 10-15 min, continuously introducing high-purity nitrogen gas and keeping sealed, adding metal sodium slices in batches at 5 g / min, the metal sodium slices are less than 1 mm, continuously stirring at 500-600 r / min for 20-30 min, cooling to 0-10 DEG C after the reaction is completed, adding anhydrous ethanol dropwise until no bubbles are generated, taking the upper clear liquid after standing and layering to complete the preparation of the treatment solution.

8. The paint with good wear resistance according to claim 7, characterized in that, The mass ratio of the metal sodium slices, naphthalene and tetrahydrofuran is 1:1:

10.

9. The paint with good wear resistance according to claim 1, characterized in that, The preparation step of the wear-resistant aid is: adding the pretreated nickel-based metal glass micro powder and magnesium borate whisker into a mixing kettle, stirring at 800 r / min by a magnetic stirrer for 10 min, then adding the pretreated polytetrafluoroethylene micro powder, and continuously stirring at 300 r / min for 5 min to complete the preparation of the wear-resistant aid.

10. A process for the preparation of a coating material having improved abrasion resistance, according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: Step one: adding deionized water into a reaction kettle, stirring at 300-500 r / min by a magnetic stirrer, and sequentially adding alkyd resin and water-based acrylic emulsion, and continuously stirring for 10-15 min; Step two: sequentially adding the wear-resistant aid and molybdenum disulfide micro powder into the reaction kettle in step one, increasing the rotating speed to 800-1000 r / min, stirring for 20-30 min, reducing the rotating speed to 300-400 r / min, adding a dispersing agent and a defoaming agent, stirring for 10-15 min, slowly adding a thickening agent, and continuously stirring for 5-10 min to obtain a mixed liquid; Step three: sieving the mixed liquid through a 200-mesh sieve, standing for 30-40 min, and completing the preparation of the coating.

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