A dense dustproof and corrosion-resistant coating and its preparation method

Abstract

This invention relates to the field of anti-corrosion coating technology, and more particularly to a dense dustproof and anti-corrosion coating and its preparation method. The technical solution includes the following raw materials in parts by weight: 10-22 parts nano zinc oxide, 5-10 parts nano aluminum powder, 7-17 parts nano silica, 3-9 parts nano titanium dioxide, 4-8 parts nano calcium silicate, 5-12 parts nano aluminum silicate, 30-66 parts solvent, 3-7 parts binder, 0.5-3 parts wetting agent, 0.3-3 parts leveling agent, and 0.8-3 parts curing accelerator. This invention maintains surface cleanliness, and the zinc oxide improves conductivity, effectively preventing dust adhesion, thus having a synergistic effect. It improves the adhesion between the coating and the substrate, enhances the coating's durability, prevents dust and dirt adhesion, provides excellent corrosion and wear resistance, and resists ultraviolet radiation, greatly extending the service life of the coated object.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion coating technology, and in particular to a dense dustproof and anti-corrosion coating and its preparation method. Background Technology

[0002] Corrosion is a common natural phenomenon, almost ubiquitous in daily life. For example, iron pots in the kitchen rust, carbonated drinks corrode teeth, and street railings weather and crack. Scientifically defined, corrosion refers to the destructive or deteriorating phenomenon caused by the interaction of materials (including metals and non-metals) with their surrounding medium (water, air, acids, alkalis, salts, solvents, etc.). The harm caused by corrosion to society is often overlooked; statistics show that global economic losses due to corrosion each year account for approximately 3% of GDP.

[0003] To protect metal surfaces from corrosion, a coating is often applied. This coating forms a protective film on the metal surface, blocking the erosion of the metal by air and moisture, thus extending the service life of metal products. Coatings can also give metal products different colors and textures, enhancing their aesthetic appeal and meeting diverse aesthetic needs. Furthermore, the coating formed through spraying can increase the hardness and wear resistance of the metal surface, improving the durability of metal products.

[0004] However, spray coatings also have certain drawbacks, such as dust easily adhering to the coating surface, which increases chemical corrosion and thus affects the service life of the metal. Therefore, this application proposes a dense dustproof and corrosion-resistant coating and its preparation method. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art where coating surfaces are prone to dust accumulation, increasing chemical corrosion, by proposing a dense dustproof and corrosion-resistant coating and its preparation method.

[0006] On one hand, the present invention provides a dense dustproof and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0007] 10-22 parts nano zinc oxide, 5-10 parts nano aluminum powder, 7-17 parts nano silica, 3-9 parts nano titanium dioxide, 4-8 parts nano calcium silicate, 5-12 parts nano aluminum silicate, 30-66 parts solvent, 3-7 parts binder, 0.5-3 parts wetting agent, 0.3-3 parts leveling agent, and 0.8-3 parts curing accelerator.

[0008] Optional ingredients include the following parts by weight:

[0009] 12-20 parts nano zinc oxide, 6-9 parts nano aluminum powder, 8-15 parts nano silica, 4-8 parts nano titanium dioxide, 5-8 parts nano calcium silicate, 6-11 parts nano aluminum silicate, 40-60 parts solvent, 3-6 parts binder, 2-3 parts wetting agent, 2-3 parts leveling agent, and 2-3 parts curing accelerator.

[0010] Optionally, the solvent is any one of butanone, acetone, and toluene.

[0011] Optionally, the binder is a 1:1 mixture of acrylate and amino resin.

[0012] Optionally, the wetting agent is heptadecanyl imidazoline, the leveling agent is siloxane, and the curing accelerator is dodecanoic acid.

[0013] On the other hand, the present invention provides a method for preparing a dense dustproof and corrosion-resistant coating, comprising the following steps:

[0014] Step S1, preparing the nanopowder mixture, specifically includes the following steps:

[0015] Step S101: Add zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate to a ball mill and mix and pulverize at a speed of 200-300 rpm for 1-5 hours.

[0016] Step S102: Increase the ball mill speed to 500-600 rpm and ball mill for 30-36 hours to obtain mixed powder;

[0017] Step S103, heat treatment annealing: Take out the mixed powder, place it in a tube furnace and keep it at 450-550℃ for 2-4 hours for heat treatment annealing, and then wash and dry to obtain the nano powder mixture;

[0018] Step S2: Add the nanopowder mixture to a mixer, then add solvent and stir for 3-8 hours to obtain a liquid mixture;

[0019] Step S3: Add the binder to the liquid mixture and continue stirring for 1-2 hours;

[0020] Step S4: Add wetting agent, leveling agent and curing accelerator to the mixer in sequence, and continue mixing for 2-5 hours to obtain the coating;

[0021] Step S5: First, spray a binder onto the substrate surface and let it dry for 3-10 minutes. Then, spray the prepared coating through a thermal spraying particle beam spray gun system to form a nano-coating.

[0022] Optionally, in step S101, the ball-to-material ratio in the ball mill is 10:1.

[0023] Optionally, in step S103, the washing involves rinsing with deionized water 3-5 times, and the drying involves drying in an oven at 30-50°C for 20-40 minutes.

[0024] Optionally, in step S2, the mixer speed is 200-300 rad / min, and the temperature is set to 30-40℃.

[0025] Optionally, the thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for spraying the coating, wherein the thermal spraying particle beam is in a molten state and the scanning speed of the thermal spraying particle beam is 100-500m / s.

[0026] Compared with the prior art, the present invention has the following beneficial technical effects:

[0027] The addition of nano zinc oxide and nano calcium silicate can effectively prevent the adhesion of dust and dirt, maintain the cleanliness of the surface, and zinc oxide can improve the conductivity, effectively preventing dust adhesion, thus having a synergistic effect.

[0028] The addition of nano-silica and nano-titanium dioxide enhances the corrosion resistance of the coating, protecting the substrate from oxidation and corrosion. The addition of nano-calcium silicate strengthens the coating's hardness and abrasion resistance, extending its service life. Furthermore, the addition of nano-aluminum silicate improves the adhesion between the coating and the substrate, enhancing its durability.

[0029] The addition of nano-titanium dioxide enhances the coating's UV resistance and reduces aging and fading. This formulation can produce a dense, dustproof, and corrosion-resistant coating with excellent performance and long-lasting protection, meeting the high requirements of industrial and manufacturing sectors.

[0030] The dense, dustproof, and corrosion-resistant coating prepared by this invention offers advantages in its versatility and long-term protective capabilities. It prevents the adhesion of dust and dirt, provides excellent corrosion and abrasion resistance, and protects against UV radiation. This significantly extends the service life of the coated object and reduces maintenance and replacement costs. Furthermore, the coating formulation exhibits high adhesion and good flowability, making it suitable for various coating methods and surface morphologies. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0032] In the following examples and comparative examples:

[0033] The binder is a 1:1 mixture of acrylate and amino resin.

[0034] The wetting agent is heptadecanyl imidazoline, the leveling agent is siloxane, and the curing accelerator is dodecanoic acid.

[0035] Example 1

[0036] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0037] The ingredients are: 10 kg of nano zinc oxide, 5 kg of nano aluminum powder, 7 kg of nano silicon dioxide, 3 kg of nano titanium dioxide, 4 kg of nano calcium silicate, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0038] The preparation method specifically includes the following steps:

[0039] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the ball milling time was increased to 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0040] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0041] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0042] Example 2

[0043] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0044] The ingredients are: 12 kg of nano zinc oxide, 6 kg of nano aluminum powder, 9 kg of nano silicon dioxide, 5 kg of nano titanium dioxide, 5 kg of nano calcium silicate, 7 kg of nano aluminum silicate, 34 kg of solvent, 4 kg of binder, 1 kg of wetting agent, 0.6 kg of leveling agent, and 1 kg of curing accelerator. The solvent is acetone.

[0045] The preparation method specifically includes the following steps:

[0046] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 220 rpm for 2 hours. The ball milling ratio was 10:1. The ball mill speed was then increased to 520 rpm, and the ball milling time was 32 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 460℃ for 3 hours for heat treatment annealing. Then, it was washed 4 times with deionized water and dried in an oven at 35℃ for 25 minutes to obtain a nano powder mixture.

[0047] Then, the nanopowder mixture was added to a mixer at a speed of 230 rad / min and a temperature of 33°C. Solvent was then added and the mixture was stirred for 4 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another 1.5 hours.

[0048] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 3 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 4 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 200 m / s.

[0049] Example 3

[0050] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0051] The ingredients are: 16 kg of nano zinc oxide, 8 kg of nano aluminum powder, 12 kg of nano silicon dioxide, 6 kg of nano titanium dioxide, 6 kg of nano calcium silicate, 9 kg of nano aluminum silicate, 48 kg of solvent, 5 kg of binder, 1.8 kg of wetting agent, 1.6 kg of leveling agent, and 1.9 kg of curing accelerator. The solvent is toluene.

[0052] The preparation method specifically includes the following steps:

[0053] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 250 rpm for 3 hours, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 550 rpm, and the ball milling time was 33 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 500℃ for 3 hours for heat treatment annealing. Then, it was washed 4 times with deionized water and dried in an oven at 40℃ for 30 minutes to obtain a nano powder mixture.

[0054] Then, the nanopowder mixture was added to a mixer at a speed of 250 rad / min and a temperature of 35°C. Solvent was then added and the mixture was stirred for 6 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another 1.5 hours.

[0055] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 3.5 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 6.5 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 300 m / s.

[0056] Example 4

[0057] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0058] The ingredients are: 18 kg of nano zinc oxide, 8 kg of nano aluminum powder, 15 kg of nano silicon dioxide, 7 kg of nano titanium dioxide, 7 kg of nano calcium silicate, 10 kg of nano aluminum silicate, 60 kg of solvent, 6 kg of binder, 2.5 kg of wetting agent, 2.5 kg of leveling agent, and 2.4 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0059] The preparation method specifically includes the following steps:

[0060] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 280 rpm for 4 hours, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 580 rpm, and the ball milling time was increased to 34 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 520℃ for 3 hours for heat treatment annealing. Then, it was washed 4 times with deionized water and dried in an oven at 45℃ for 35 minutes to obtain a nano powder mixture.

[0061] Then, the nanopowder mixture was added to a mixer at a speed of 280 rad / min and a temperature of 38°C. Solvent was then added and the mixture was stirred for 7 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another 1.7 hours.

[0062] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 4 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 7 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 400 m / s.

[0063] Example 5

[0064] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0065] The ingredients are: 22 kg of nano zinc oxide, 10 kg of nano aluminum powder, 17 kg of nano silicon dioxide, 9 kg of nano titanium dioxide, 8 kg of nano calcium silicate, 12 kg of nano aluminum silicate, 66 kg of solvent, 7 kg of binder, 3 kg of wetting agent, 3 kg of leveling agent, and 3 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0066] The preparation method specifically includes the following steps:

[0067] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at 300 rpm for 5 hours, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 600 rpm, and the milling time was increased to 36 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and held at 550℃ for 4 hours for heat treatment annealing. Then, it was washed 5 times with deionized water and dried in an oven at 50℃ for 40 minutes to obtain a nano powder mixture.

[0068] Then, the nanopowder mixture was added to a mixer at a speed of 300 rad / min and a temperature of 40°C. Solvent was then added and the mixture was stirred for 8 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another 2 hours.

[0069] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 5 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 10 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 500 m / s.

[0070] Comparative Example 1

[0071] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0072] The ingredients are: 5 kg of nano aluminum powder, 7 kg of nano silica, 3 kg of nano titanium dioxide, 4 kg of nano calcium silicate, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0073] The preparation method specifically includes the following steps:

[0074] First, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the ball milling time was increased to 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0075] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0076] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0077] Comparative Example 2

[0078] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0079] The ingredients are: 10 kg of nano zinc oxide, 7 kg of nano silicon dioxide, 3 kg of nano titanium dioxide, 4 kg of nano calcium silicate, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0080] The preparation method specifically includes the following steps:

[0081] First, zinc oxide, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the ball milling time was 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0082] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0083] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0084] Comparative Example 3

[0085] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0086] The ingredients are: 10 kg of nano zinc oxide, 5 kg of nano aluminum powder, 3 kg of nano titanium dioxide, 4 kg of nano calcium silicate, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0087] The preparation method specifically includes the following steps:

[0088] First, zinc oxide, aluminum powder, titanium dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the milling time was 30 hours to obtain a mixed powder. Heat treatment annealing was then performed: the mixed powder was removed and placed in a tube furnace at 450℃ for 2 hours for heat treatment annealing. It was then washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano-powder mixture.

[0089] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0090] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0091] Comparative Example 4

[0092] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0093] The ingredients are: 10 kg of nano zinc oxide, 5 kg of nano aluminum powder, 7 kg of nano silica, 4 kg of nano calcium silicate, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0094] The preparation method specifically includes the following steps:

[0095] First, zinc oxide, aluminum powder, silicon dioxide, calcium silicate, and aluminum silicate were added to a ball mill and mixed and pulverized at 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the milling time was 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0096] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0097] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0098] Comparative Example 5

[0099] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0100] The ingredients are: 10 kg of nano zinc oxide, 5 kg of nano aluminum powder, 7 kg of nano silicon dioxide, 3 kg of nano titanium dioxide, 5 kg of nano aluminum silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0101] The preparation method specifically includes the following steps:

[0102] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, and aluminum silicate were added to a ball mill and mixed and pulverized at a speed of 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the ball milling time was 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0103] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0104] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0105] Comparative Example 6

[0106] A dense, dustproof, and corrosion-resistant coating, comprising the following raw materials in parts by weight:

[0107] The ingredients are: 10 kg of nano zinc oxide, 5 kg of nano aluminum powder, 7 kg of nano silicon dioxide, 3 kg of nano titanium dioxide, 4 kg of nano calcium silicate, 30 kg of solvent, 3 kg of binder, 0.5 kg of wetting agent, 0.3 kg of leveling agent, and 0.8 kg of curing accelerator. The solvent is methyl ethyl ketone (MEK).

[0108] The preparation method specifically includes the following steps:

[0109] First, zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, and calcium silicate were added to a ball mill and mixed and pulverized at 200 rpm for 1 hour, with a ball-to-material ratio of 10:1. The ball mill speed was then increased to 500 rpm, and the milling time was 30 hours to obtain a mixed powder. Heat treatment annealing: The mixed powder was taken out and placed in a tube furnace and kept at 450℃ for 2 hours for heat treatment annealing. Then, it was washed three times with deionized water and dried in an oven at 30℃ for 20 minutes to obtain a nano powder mixture.

[0110] Then, the nanopowder mixture was added to a mixer at a speed of 200 rad / min and a temperature of 30°C. Solvent was then added and the mixture was stirred for 3 hours to obtain a liquid mixture. The binder was then added to the liquid mixture and the mixture was stirred for another hour.

[0111] Finally, wetting agent, leveling agent, and curing accelerator are added to the mixer in sequence, and stirring is continued for 2 hours to obtain the coating. First, a binder is sprayed onto the substrate surface, and after drying for 3 minutes, the prepared coating is sprayed through a thermal spraying particle beam spray gun system to form a nano-coating. The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for the coating. The thermal spraying particle beam is molten, and the scanning speed of the thermal spraying particle beam is 100 m / s.

[0112] To verify the technical effects of the present invention, performance tests were conducted on the coatings prepared in Examples 1-5 and Comparative Examples 1-6.

[0113] Bond strength test: according to ISO 4624:2016 "Coatings and coating systems - Bond strength - Tensile method".

[0114] Porosity testing: Tested according to ISO 9377-2:2010 "Determination of porosity and interconnected porosity in coatings".

[0115] Oxygen content detection: The oxygen content in the coating is detected using an oxygen content analyzer.

[0116] Corrosion resistance test: The corrosion condition of the substrate surface was recorded according to the salt spray test ASTM B117-19 "Salt spray (droplet) test method for coatings and platings resistant to salt water corrosion".

[0117] Dust resistance test: The standard sample of ash for the stain resistance test of architectural coatings specified in standard GB / T9780-2013 is used to fully cover the untreated test area. After 15 minutes, the test board is placed vertically and tapped lightly on the table 10 times. The grade is evaluated according to the following requirements.

[0118] Contamination level

[0119] Level 0 — No pollution;

[0120] Level 1 - Just noticeable, very slight staining;

[0121] Level 2 - Slight staining;

[0122] Level 3 - Obvious contamination;

[0123] Level 4 – Significant contamination;

[0124] Level 5 - Severely contaminated;

[0125] The specific test results are shown in the table below.

[0126] Table 1 Test data of Examples 1-5 and Comparative Examples 1-6

[0127]

[0128] As can be seen from the data in the table above, the coating prepared by this invention exhibits excellent performance in terms of coating bonding strength, porosity, oxygen content, corrosion resistance, and dustproof properties, demonstrating the optimality of the formulation of this invention. The prepared coating can effectively prevent dust, thereby reducing chemical corrosion, and at the same time form a dense coating that can effectively isolate air and prevent water penetration, thus protecting the metal and making it suitable for a wide range of applications.

[0129] This invention effectively prevents the adhesion of dust and dirt by adding nano-zinc oxide and nano-calcium silicate, maintaining surface cleanliness. Zinc oxide also improves conductivity, effectively preventing dust adhesion and exhibiting a synergistic effect. The addition of nano-silica and nano-titanium dioxide enhances the coating's corrosion resistance, protecting the substrate from oxidation and corrosion. The addition of nano-calcium silicate strengthens the coating's hardness and wear resistance, extending its service life. Furthermore, the addition of nano-aluminum silicate improves the adhesion between the coating and the substrate, enhancing its durability. The addition of nano-titanium dioxide improves the coating's UV resistance, reducing aging and fading. This formulation can produce a dense, dust- and corrosion-resistant coating with excellent performance and long-lasting protection, meeting the high requirements of industrial and manufacturing fields.

[0130] The dense, dustproof, and corrosion-resistant coating prepared by this invention offers advantages in its versatility and long-term protective capabilities. It prevents the adhesion of dust and dirt, provides excellent corrosion and abrasion resistance, and protects against UV radiation. This significantly extends the service life of the coated object and reduces maintenance and replacement costs. Furthermore, the coating formulation exhibits high adhesion and good flowability, making it suitable for various coating methods and surface morphologies.

[0131] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A dense, dustproof, and corrosion-resistant coating, characterized in that, Including the following parts by weight of raw materials: Nano zinc oxide 10-22 parts, nano aluminum powder 5-10 parts, nano silica 7-17 parts, nano titanium dioxide 3-9 parts, nano calcium silicate 4-8 parts, nano aluminum silicate 5-12 parts, solvent 30-66 parts, binder 3-7 parts, wetting agent 0.5-3 parts, leveling agent 0.3-3 parts, curing accelerator 0.8-3 parts; Includes the following steps: Step S1, preparing the nanopowder mixture, specifically includes the following steps: Step S101: Add zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate to a ball mill and mix and pulverize at a speed of 200-300 rpm for 1-5 hours. Step S102: Increase the ball mill speed to 500-600 rpm and ball mill for 30-36 hours to obtain mixed powder; Step S103, heat treatment annealing: Take out the mixed powder, place it in a tube furnace and keep it at 450-550℃ for 2-4 hours for heat treatment annealing, and then wash and dry to obtain the nano powder mixture; Step S2: Add the nanopowder mixture to a mixer, then add solvent and stir for 3-8 hours to obtain a liquid mixture; Step S3: Add the binder to the liquid mixture and continue stirring for 1-2 hours; Step S4: Add wetting agent, leveling agent and curing accelerator to the mixer in sequence, and continue mixing for 2-5 hours to obtain the coating; Step S5: First, spray a binder onto the substrate surface and let it dry for 3-10 minutes. Then, spray the prepared coating through a thermal spraying particle beam spray gun system to form a nano-coating.

2. The dense dustproof and corrosion-resistant coating according to claim 1, characterized in that, Including the following parts by weight of raw materials: 12-20 parts nano zinc oxide, 6-9 parts nano aluminum powder, 8-15 parts nano silica, 4-8 parts nano titanium dioxide, 5-8 parts nano calcium silicate, 6-11 parts nano aluminum silicate, 40-60 parts solvent, 3-6 parts binder, 2-3 parts wetting agent, 2-3 parts leveling agent, and 2-3 parts curing accelerator.

3. The dense dustproof and corrosion-resistant coating according to claim 1, characterized in that, The solvent is any one of butanone, acetone, and toluene.

4. The dense dustproof and corrosion-resistant coating according to claim 1, characterized in that, The wetting agent is heptadecanyl imidazoline, the leveling agent is siloxane, and the curing accelerator is dodecanoic acid.

5. A method for preparing a dense dustproof and corrosion-resistant coating according to any one of claims 1-4, characterized in that, Includes the following steps: Step S1, preparing the nanopowder mixture, specifically includes the following steps: Step S101: Add zinc oxide, aluminum powder, silicon dioxide, titanium dioxide, calcium silicate, and aluminum silicate to a ball mill and mix and pulverize at a speed of 200-300 rpm for 1-5 hours. Step S102: Increase the ball mill speed to 500-600 rpm and ball mill for 30-36 hours to obtain mixed powder; Step S103, heat treatment annealing: Take out the mixed powder, place it in a tube furnace and keep it at 450-550℃ for 2-4 hours for heat treatment annealing, and then wash and dry to obtain the nano powder mixture; Step S2: Add the nanopowder mixture to a mixer, then add solvent and stir for 3-8 hours to obtain a liquid mixture; Step S3: Add the binder to the liquid mixture and continue stirring for 1-2 hours; Step S4: Add wetting agent, leveling agent and curing accelerator to the mixer in sequence, and continue mixing for 2-5 hours to obtain the coating; Step S5: First, spray a binder onto the substrate surface and let it dry for 3-10 minutes. Then, spray the prepared coating through a thermal spraying particle beam spray gun system to form a nano-coating.

6. The method for preparing a dense dustproof and corrosion-resistant coating according to claim 5, characterized in that, In step S101, the ball-to-material ratio in the ball mill is 10:

1.

7. The method for preparing a dense dustproof and corrosion-resistant coating according to claim 5, characterized in that, In step S103, the washing process involves rinsing with deionized water 3-5 times, and the drying process involves drying in an oven at 30-50°C for 20-40 minutes.

8. The method for preparing a dense dustproof and corrosion-resistant coating according to claim 5, characterized in that, In step S2, the mixer speed is 200-300 rad / min and the temperature is set to 30-40℃.

9. The method for preparing a dense dustproof and corrosion-resistant coating according to claim 5, characterized in that, The thermal spraying particle beam spray gun system is used to generate the thermal spraying particle beam required for spraying the coating. The thermal spraying particle beam is in a molten state and the scanning speed of the thermal spraying particle beam is 100-500m / s.

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