High-temperature-resistant anti-corrosion coating and preparation method thereof

Abstract

The invention discloses a high-temperature-resistant anti-corrosion coating and a preparation method thereof. The high-temperature-resistant anti-corrosion coating comprises 20 wt% to 40 wt% of heat-resistant silicon resin, 30 wt% to 45 wt% of filler, 0.5 wt% to 5 wt% of a coalescing agent and 15 wt% to 30 wt% of a solvent. The filler comprises a metal filler and a flaky filler, and the weight ratio of the metal filler to the flaky filler is 1: 2-1: 3. According to the high-temperature-resistant anti-corrosion coating and the preparation method thereof disclosed by the invention, the adherence and the anti-corrosion effect of the high-temperature-resistant anti-corrosion coating can be improved.

Description

Technical Field

[0001] The present invention relates to a high-temperature resistant and corrosion-proof coating and a manufacturing method thereof, in particular to an organic high-temperature resistant and corrosion-proof coating and a manufacturing method thereof. Background Art

[0002] In the chemical industry and chemical plants, metal barrels and tanks are often used to store chemical materials, and pipelines are used to connect to various equipment to carry out chemical-related processes. In order to increase the durability of metal barrels, pipelines and equipment, the prior art uses inorganic ceramic corrosion-proof coatings to coat the surfaces of metal barrels, pipelines and equipment.

[0003] However, the adhesion between the inorganic ceramic corrosion-proof coating and the organic surface coating is not good, and there are problems such as surface pinholes, blisters, cracks and poor adhesion after short-term use. In the long term, there are also concerns about coating peeling and damage. In addition, high temperatures are often used in production lines in the chemical industry and chemical plants, and the corrosion-proof coating still needs to have the characteristic of high-temperature resistance.

[0004] Therefore, how to improve the adhesion of the coating through the improvement of the ingredient formula, and achieve the effects of high-temperature resistance, corrosion prevention and energy conservation and carbon reduction to overcome the above defects has become one of the important issues to be solved in this industry. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high-temperature resistant and corrosion-proof coating for the deficiencies of the prior art, which includes: 20 wt% to 40 wt% of heat-resistant silicone resin; 30 wt% to 45 wt% of filler; 0.5 wt% to 5 wt% of film-forming auxiliary agent; and 15 wt% to 30 wt% of solvent. The filler includes metal filler and flaky filler, and the weight ratio of the metal filler to the flaky filler is 1:2 to 1:3.

[0006] Furthermore, the heat-resistant silicone resin is methyl / phenyl modified silicone resin, epoxy resin modified silicone resin and polyester modified silicone resin.

[0007] Furthermore, in the methyl / phenyl modified silicone resin, the content of methyl is 20 to 35%, and the content of phenyl is 65 to 80%.

[0008] Furthermore, the viscosity of the methyl / phenyl modified silicone resin is 20 to 100 mm 2 / s.

[0009] Furthermore, the filler is selected from at least one or a combination of aluminum powder, zinc powder, talc powder, aluminum magnesium talc, magnesium talc, flake glass and silicon talc.

[0010] Furthermore, the flaky filler includes magnesium talc and flake glass.

[0011] Furthermore, the weight ratio of the talcum to the flake glass is from 2:1 to 1:2.

[0012] Furthermore, the flake diameter of the flake glass is greater than that of the talcum.

[0013] Furthermore, the flake diameter of the talcum is from 3 μm to 5 μm, and the flake diameter of the flake glass is from 10 μm to 20 μm.

[0014] Furthermore, the film-forming auxiliary is selected from at least one or a combination of alcohol ethers, alcohol zirconates, a mixture of ethylene glycol monobutyl ether / dipropylene glycol butyl ether, or plasticizers.

[0015] Furthermore, the solvent is selected from at least one or a combination of toluene, xylene, and aromatic hydrocarbon solvents.

[0016] Furthermore, the high-temperature corrosion-resistant coating further comprises a curing catalyst, and the content of the curing catalyst is from 0.5 wt% to 2 wt% of the heat-resistant silicone resin.

[0017] In order to solve the above technical problems, one of the technical solutions adopted in the present invention is to provide a method for manufacturing a high-temperature corrosion-resistant coating, which includes: preparing 30 wt% to 45 wt% of fillers with a weight ratio of metal fillers to the flaky fillers of 1:2 to 1:3; pre-dispersing 20 wt% to 40 wt% of the heat-resistant silicone resin, the flaky fillers, and 0.5 wt% to 5 wt% of the film-forming auxiliary to obtain a pre-dispersed liquid; adding the metal fillers and 15 wt% to 30 wt% of the solvent to the pre-dispersed liquid and stirring evenly to obtain the high-temperature corrosion-resistant coating.

[0018] Furthermore, the heat-resistant silicone resin has a refractive index of 1.40 to 1.53 and a viscosity of 20 to 100 mm 2 / s.

[0019] Furthermore, the heat-resistant silicone resin is a methyl / phenyl modified silicone resin, and in the methyl / phenyl modified silicone resin, the content of methyl is 20 to 35%, and the content of phenyl is 65 to 80%.

[0020] Furthermore, the flaky fillers include talcum and flake glass composed of a weight ratio of 2:1 to 1:2.

[0021] Furthermore, the film-forming auxiliary is selected from at least one or a combination of alcohol ethers, alcohol zirconates, a mixture of ethylene glycol monobutyl ether / dipropylene glycol butyl ether, or plasticizers.

[0022] Furthermore, the solvent is selected from at least one or a combination of toluene, xylene, and aromatic hydrocarbon solvents.

[0023] Furthermore, the manufacturing method of the high-temperature corrosion-resistant coating further includes adding a curing catalyst to the high-temperature corrosion-resistant coating before use, and the content of the curing catalyst is 0.5 wt% to 2 wt% of the heat-resistant silicone resin.

[0024] Furthermore, the curing catalyst is an alkoxysilane.

[0025] One beneficial effect of the present invention is that the high-temperature corrosion-resistant coating and its manufacturing method provided by the present invention can improve the adhesion and corrosion protection effect of the high-temperature corrosion-resistant coating through the technical solutions of "the filler includes metal filler and flaky filler" and "the weight ratio of the metal filler to the flaky filler is 1:2 to 1:3".

[0026] In order to further understand the features and technical content of the present invention, please refer to the following detailed description of the present invention. However, the detailed description provided is only for reference and illustration, and is not used to limit the present invention. Detailed Embodiments

[0027] The following are specific examples to illustrate the embodiments of the "high-temperature corrosion-resistant coating and its manufacturing method" disclosed by the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. The following embodiments will further detail the related technical content of the present invention, but the disclosed content is not used to limit the protection scope of the present invention.

[0028] First Embodiment

[0029] The first embodiment of the present invention provides a high-temperature corrosion-resistant coating, which may include: heat-resistant silicone resin, filler, film-forming aid, and solvent. To conform to the operating temperatures of 200°C to 300°C often used in chemical plants, the high temperature resistance or heat resistance referred to herein means that it can withstand a temperature of about 450°C. The heat-resistant silicone resin can be methyl / phenyl modified silicone resin, epoxy resin modified silicone resin, and polyester modified silicone resin. In a preferred embodiment, the heat-resistant silicone resin can be methyl / phenyl modified silicone resin.

[0030] Furthermore, based on the total weight of the high-temperature resistant and corrosion-resistant coating, the content of the heat-resistant silicone resin can be 20 wt% to 40 wt%, that is, any positive number between 20 wt% and 40 wt% and including them, such as 20, 25, 30, 35, or 40 wt%. If the content of the heat-resistant silicone resin is less than 20 wt%, it will make the high-temperature resistant and corrosion-resistant coating have poor fluidity and be unfavorable for coating. If the content of the heat-resistant silicone resin is greater than 40 wt%, the high-temperature resistance effect of the high-temperature resistant and corrosion-resistant coating will be insufficient. In a preferred embodiment, the content of the heat-resistant silicone resin can be 25 wt% to 35 wt%.

[0031] It should be noted that when the heat-resistant silicone resin is a methyl / phenyl modified silicone resin, based on the total weight of methyl and phenyl in the heat-resistant silicone resin, the content of methyl can be 20 to 35%, and the content of phenyl can be 65 to 80% to obtain a methyl / phenyl modified silicone resin with a viscosity of 20 to 100 mm 2 / s. If the content of methyl is less than 20% or the content of phenyl is higher than 80%, the texture of the methyl / phenyl modified silicone resin will be relatively hard and brittle. If the content of methyl is higher than 35% or the content of phenyl is less than 65%, it will cause the viscosity of the methyl / phenyl modified silicone resin to be too low to be coated, and the heat resistance will also be insufficient. In a preferred embodiment, the content of methyl can be 25 to 30%, and the content of phenyl can be 70 to 75% to make the methyl / phenyl modified silicone resin of this case have the best balance between softness and hardness and heat resistance.

[0032] In other words, the amount of methyl content will affect the softness of the resin, and the amount of phenyl content will affect the heat resistance of the resin. The present invention further studies the influence of the ratio of methyl to phenyl in the high-temperature resistant and corrosion-resistant coating on the high-temperature resistant and corrosion-resistant coating. The ratio of methyl to phenyl and the experimental results are shown in Table 1.

[0033] In Table 1, the high-temperature resistant and corrosion-resistant coating includes 27 wt% of heat-resistant silicone resin, 40 wt% of filler, 3 wt% of film-forming aid, and 30 wt% of solvent. Among them, the heat-resistant silicone resin with a methyl / phenyl ratio of 28 / 72 is KR500 purchased from Shin-Etsu Chemical Co., Ltd., the heat-resistant silicone resin with a methyl / phenyl ratio of 15 / 85 is X-40-9227 purchased from Shin-Etsu Chemical Co., Ltd., and the heat-resistant silicone resin with a methyl / phenyl ratio of 40 / 60 is KR-515 purchased from Shin-Etsu Chemical Co., Ltd. The metal filler is aluminum powder, and the flaky filler is a mixture of magnesium talc and flake glass (the weight ratio of metal filler to flaky filler is 1:2, and the weight ratio of magnesium talc to flake glass is 1:1). The film-forming aid is polyether-modified polydimethylsiloxane, and the solvent is toluene.

[0034] Table 1

[0035]

[0036] In Table 1, when the methyl content is 28% and the phenyl content is 72%, the surface pencil hardness is most moderate (4H), and it can have both sufficient adhesive strength and pulling force. That is, in the preferred embodiment of the present invention, the ratio of methyl:phenyl can be 7:18. In contrast, when the methyl content is 15% and the phenyl content is 85%, the texture of the resin will be relatively hard and brittle. When the methyl content is 40% and the phenyl content is 60%, the surface pencil hardness is too soft, and the pulling force is also too low to provide sufficient adhesion. In an embodiment of the present invention, the specific gravity of the methyl / phenyl modified silicone resin can be 1.08 to 1.12. The refractive index of the methyl / phenyl modified silicone resin can be 1.40 to 1.53.

[0037] To increase the corrosion resistance of the high-temperature corrosion-resistant coating, the high-temperature corrosion-resistant coating of the present invention may contain fillers. Based on the total weight of the high-temperature corrosion-resistant coating, the content of the filler can be 30wt% to 45wt%, that is, any positive number between 30wt% and 45wt%, such as 30, 32, 34, 36, 38, 40, 42, 44 or 45wt%. If the content of the filler is less than 30wt%, the required corrosion resistance effect cannot be achieved. If the filler content is greater than 40wt%, it will affect the film-forming property of the high-temperature corrosion-resistant coating. In a preferred embodiment, the content of the filler can be 35wt% to 40wt%.

[0038] For example, the filler can be selected from at least one of aluminum powder, zinc powder, talc powder, aluminum magnesium talc, magnesium talc, flake glass and silicon talc or a combination thereof. It should be noted that the high-temperature corrosion-resistant coating of the present invention can use a combination of metal fillers and flake fillers to further improve the high-temperature resistance effect of the high-temperature corrosion-resistant coating. The present invention studies the influence of the ratio of metal fillers and flake fillers in the high-temperature corrosion-resistant coating on the high-temperature corrosion-resistant coating. The ratio of metal fillers to flake fillers and the experimental results are shown in Table 2. The formulation of the high-temperature corrosion-resistant coating in Table 2 is roughly the same as that in Table 1, only changing the ratio of metal filler:flake filler, that is, the total amount of metal filler and flake filler in the coating is still 40wt%, and the ratio of metal filler and flake filler in the filler is changed for testing.

[0039] Table 2

[0040]

[0041] As shown in Table 2, when the ratio of metal filler to flaky filler is 1:1, the hardness is relatively high, and the adhesion and pull-out force still need to be enhanced. When the ratio of metal filler to flaky filler is 1:4, the hardness is relatively low. Although the adhesion is improved compared to the ratio of 1:1, the pull-out force is worse, and it is prone to dripping during the coating process. However, when the ratio of metal filler to flaky filler is 1:2 and 1:3, the surface pencil hardness is the most moderate (4H), and it can have both sufficient adhesion and pull-out force. Therefore, the weight ratio of the metal filler to the flaky filler in the present invention is preferably 1:2 to 1:3.

[0042] Furthermore, the flaky filler may include magnesium talc and flake glass. Since the flake diameter of flake glass is larger than that of magnesium talc, that is, magnesium talc and flake glass have different flake diameters, the small-diameter magnesium talc can fill the gaps between the large-diameter flake glass, enabling the overall filler to adhere more densely to the coating surface, thereby reducing the gas penetration rate and water vapor penetration rate. Specifically, the flake diameter of magnesium talc can be 3 μm to 5 μm, and the flake diameter of flake glass can be 10 μm to 20 μm. The flake diameter referred to herein is the average flake diameter (D 50 ). The present invention studies the ratio of magnesium talc to flake glass in the high-temperature resistant anti-corrosion coating. The ratio of magnesium talc to flake glass and the experimental results are shown in Table 3. The formulation of the high-temperature resistant anti-corrosion coating in Table 3 is roughly the same as that in Table 1, and only the ratio of magnesium talc:flake glass in the flaky filler is changed for testing.

[0043] Table 3

[0044]

[0045] As shown in Table 3, when only magnesium talc or flake glass is used alone, that is, when magnesium talc:flake glass is 1:0 or 0:1, both the gas penetration rate and the water vapor penetration rate are relatively high, indicating that the anti-corrosion effect of the high-temperature resistant anti-corrosion coating is not good. However, when magnesium talc and flake glass are used in combination, both the gas penetration rate and the water vapor penetration rate can be reduced to less than 7%, indicating that when the weight ratio of magnesium talc to flake glass is 2:1 to 1:2, the high-temperature resistant anti-corrosion coating can have a lower gas penetration rate and water vapor penetration rate, thereby achieving a better protection and anti-corrosion effect.

[0046] In addition, in order to prevent the high-temperature resistant anti-corrosion coating from being prone to dripping during coating, or being prone to cracking or breaking during drying, the high-temperature resistant anti-corrosion coating of the present invention may further include a film-forming aid. For example, the film-forming aid can be selected from at least one or a combination of alcohol ethers, alcohol zirconates, ethylene glycol monobutyl ether / dipropylene glycol butyl ether mixtures, or plasticizers. However, the examples listed above are only one possible embodiment and are not intended to limit the present invention.

[0047] Specifically, based on the total weight of the high-temperature resistant and corrosion-resistant coating, the content of the film-forming aid can be 0.5 wt% to 5 wt%, that is, any positive number between 0.5 wt% and 5 wt% and including 0.5 wt% and 5 wt%, such as 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, or 5 wt%. If the content of the film-forming aid is less than 0.5 wt%, it cannot effectively benefit the film-forming property of the high-temperature resistant and corrosion-resistant coating. If the content of the film-forming aid is greater than 5 wt%, it will increase the manufacturing cost of the high-temperature resistant and corrosion-resistant coating. In a preferred embodiment, the content of the film-forming aid can be 2 wt% to 3.5 wt%.

[0048] Furthermore, the high-temperature resistant and corrosion-resistant coating of the present invention can further add a curing catalyst to the heat-resistant silicone resin. The content of the curing catalyst can be 0.5 wt% to 2 wt% of the heat-resistant silicone resin, that is, any positive number between 0.5 wt% and 2 wt% and including 0.5 wt% and 2 wt%, such as 0.5, 1, 1.5, or 2 wt%. If the content of the curing catalyst is less than 0.5 wt%, the help for the curing effect is limited. If the content of the curing catalyst is greater than 2 wt%, the curing speed of the high-temperature resistant and corrosion-resistant coating is too fast and it is difficult to coat. In a preferred embodiment, the content of the curing catalyst can be 1.0 wt% to 1.5 wt% of the heat-resistant silicone resin. For example, the film-forming temperature of the high-temperature resistant and corrosion-resistant coating of the present invention can be 10 °C or above, preferably 25 °C or above.

[0049] The components such as the heat-resistant silicone resin, filler, and film-forming aid included in the high-temperature resistant and corrosion-resistant coating of the present invention can be mixed in a solvent. In order to uniformly mix the components used in the high-temperature resistant and corrosion-resistant coating of the present invention, the solvent can be selected from at least one of toluene, xylene, aromatic hydrocarbon solvents, or a combination thereof. In an embodiment of the present invention, based on the total weight of the high-temperature resistant and corrosion-resistant coating, the content of the solvent can be 15 wt% to 30 wt%, preferably 20 wt% to 28 wt%.

[0050] Second Embodiment

[0051] The second embodiment of the present invention provides a manufacturing method of a high-temperature resistant and corrosion-resistant coating, which at least includes a step of preparing a filler, pre-dispersing, and mixing. Since the filler of the present invention has specific types and ratios, in the step of preparing the filler, first prepare 30 wt% to 45 wt% of the filler with the weight ratio of the metal filler to the flaky filler being 1:2 to 1:3.

[0052] In addition, since the simultaneous mixing of the metal filler and the flaky filler in the resin results in poor dispersion, when manufacturing the high-temperature corrosion-resistant coating of the present invention, it is preferable to first prepare a pre-dispersion liquid. In other words, first, 20 wt% to 40 wt% of a heat-resistant silicone resin, a flaky filler, and 0.5 wt% to 5 wt% of a film-forming aid are pre-dispersed in a homogenizer to obtain a pre-dispersion liquid. Subsequently, a metal filler and 15 wt% to 30 wt% of a solvent are added to the pre-dispersion liquid and stirred evenly with a stirrer to obtain the high-temperature corrosion-resistant coating of the present invention.

[0053] Furthermore, a curing catalyst can be added to the high-temperature corrosion-resistant coating before film coating to facilitate the hardening of the film. The content of the curing catalyst is 0.5 wt% to 2 wt% of the heat-resistant silicone resin. For example, the curing catalyst can be an alkoxysilane. However, the above examples are only one feasible embodiment and are not intended to limit the present invention.

[0054] To demonstrate the property that the high-temperature corrosion-resistant coating of the present invention does not crack at high temperatures, the high-temperature corrosion-resistant coating of the present invention is compared with an existing inorganic metal coating. In this embodiment, the high-temperature corrosion-resistant coating of the present invention includes 27 wt% of a heat-resistant silicone resin, 40 wt% of a filler, 3 wt% of a film-forming aid, and 30 wt% of a solvent. The detailed composition is the same as that in Table 1. The inorganic metal coating is an inorganic zinc powder coating. The comparison results are shown in Table 4 below.

[0055] Table 4

[0056]

[0057] As shown in Table 4, the high-temperature corrosion-resistant coating of this case has higher adhesion and pull-out force compared to the inorganic metal coating, and can improve the poor adhesion of the existing inorganic metal coating. That is to say, by replacing the existing inorganic coating with an organic coating in this case, the high-temperature corrosion-resistant coating can have better toughness and adhesion. Specifically, the high-temperature corrosion-resistant coating of this case can have a coefficient of expansion of 25 - 50 μm / m°C, and can provide better toughness and adhesion.

[0058] In this article, the surface pencil hardness is obtained by uniformly applying the corrosion-resistant coating with a thickness of 100 μm on a flat plate, curing and drying it, and then scratching it with pencils of different hardnesses until plastic deformation (permanent indentation), cohesive failure (scratches or scrapes), or a combination of the above occurs on the surface of the film.

[0059] The adhesion test of the coating film is carried out by the cross-cut test. Use a cross-cut knife to draw lines on the coating film, then stick the cut coating film with tape, and then tear off the tape. Based on the original complete area of the coating film being 100%, calculate the percentage of the area of the coating film that falls off due to the tearing of the tape, and use this percentage to represent the degree of coating film peeling to evaluate its adhesion. 5B means that the edge of the incision is completely smooth and there is no peeling at the edge of the grid; 4B means that the actual damage in the cross-cut area ≤ 5%; 3B means that the peeling area is 5% to 15%; 2B means that the peeling area is 15% to 35%; 1B means that the peeling area is 35% to 65%; 0B means that the peeling area is greater than 65%.

[0060] The pull-off force test is to apply the anti-corrosion coating on the metal layer, cure and dry to form a coating, and then carry out the pull-off force test after 24 hours of high-temperature treatment at 450°C. That is, when the coating layer is separated from the metal layer, use a pressure sensor to measure the separation force, and use the measured data as the pull-off force (MPa) of the anti-corrosion coating after heating.

[0061] In the present invention, a coating with a thickness of 60 μm can be used for the gas permeability and water vapor permeability tests. The gas permeability (OTR) is measured according to ISO 15105-1 (23°C; 100% O2; 0% RH), and the water vapor permeability (WVTR) is measured according to ISO15106-2 (38°C; 90% RH).

[0062] Beneficial effects of the embodiments

[0063] One of the beneficial effects of the present invention is that the high-temperature resistant anti-corrosion coating and its manufacturing method provided by the present invention can improve the adhesion and anti-corrosion effect of the high-temperature resistant anti-corrosion coating through the technical solutions of "the filler includes metal filler and flaky filler" and "the weight ratio of the metal filler to the flaky filler is 1:2 to 1:3".

[0064] Furthermore, for the methyl / phenyl modified silicone resin of the present invention, based on its total weight, the content of methyl is 20 to 35%, and the content of phenyl is 65 to 80% to obtain a methyl / phenyl modified silicone resin with a viscosity of 20 to 100 mm 2 / s. Accordingly, the methyl / phenyl modified silicone resin in this case can have the best soft hardness and heat resistance, and is particularly suitable for coating high-temperature resistant anti-corrosion coatings.

[0065] In addition, the filler of the high-temperature resistant anti-corrosion coating of the present invention mixes metal filler and flaky filler, and is combined with a specific ratio to obtain better adhesion and pull-off force. Specifically, when the ratio of the metal filler to the flaky filler is 1:2 and 1:3, the surface pencil hardness is the most moderate (4H), and it can have sufficient strength of adhesion and pull-off force.

[0066] Furthermore, compared with using only one type of flaky filler, the mixed use of meerschaum talc and flake glass can make the flaky fillers with different flake diameters adhere to the coating surface evenly and densely. Specifically, when the weight ratio of meerschaum talc to flake glass is from 2:1 to 1:2, the corrosion protection effect of the high-temperature corrosion protection coating can be further improved. Therefore, the high-temperature corrosion protection coating of the present invention can be applied to the outer surfaces of high-temperature tanks, pipelines or equipment, effectively improving the weather resistance of high-temperature tanks, pipelines or equipment.

[0067] The content disclosed above is only the preferred and feasible embodiment of the present invention, and does not limit the protection scope of the claims of the present invention. Therefore, all equivalent technical changes made by using the content of the specification of the present invention are included in the protection scope of the claims of the present invention.

Claims

1. A high temperature resistant anti-corrosion coating, characterized in that: The high temperature resistant anti-corrosion coating comprises: 20wt% to 40wt% of heat-resistant silicone resin; 30 to 45 wt% of filler; 0.5 wt% to 5 wt% of a film-forming aid; and 15 wt % to 30 wt % of a solvent; Wherein, the filler includes metal filler and flaky filler, and the weight ratio of the metal filler to the flaky filler is 1:2 to 1:

3.

2. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The heat-resistant silicone resin is methyl / phenyl modified silicone resin, epoxy resin modified silicone resin and polyester modified silicone resin.

3. The high temperature resistant anti-corrosion coating according to claim 2, characterized in that: In the methyl / phenyl modified silicone resin, based on the total weight of the methyl and phenyl groups in the heat-resistant silicone resin, the content of the methyl group is 20 to 35%, and the content of the phenyl group is 65 to 80%.

4. The high temperature resistant anti-corrosion coating according to claim 2, characterized in that: The viscosity of the methyl / phenyl modified silicone resin is 20 to 100 mm 2 / s.

5. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The filler is selected from at least one of aluminum powder, zinc powder, talc powder, aluminum-magnesium talc, magnesium talc, flake glass and silica talc, or a combination thereof.

6. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The flake filler includes magnesium talc and flake glass.

7. The high temperature resistant anti-corrosion coating according to claim 6, characterized in that: The weight ratio of the magnesium talc to the flake glass is 2:1 to 1:

2.

8. The high temperature resistant anti-corrosion coating according to claim 6, characterized in that: The flake diameter of the glass flake is larger than the flake diameter of the magnesium talc.

9. The high temperature resistant anti-corrosion coating according to claim 6, characterized in that: The flake diameter of the magnesium talc is 3 μm to 5 μm, and the flake diameter of the flake glass is 10 μm to 20 μm.

10. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The film-forming aid is selected from at least one of alcohol ethers, zirconium alcohols, a mixture of ethylene glycol monobutyl ether / dipropylene glycol butyl ether, or a plasticizer, or a combination thereof.

11. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The solvent is selected from at least one of toluene, xylene, aromatic hydrocarbon solvents or a combination thereof.

12. The high temperature resistant anti-corrosion coating according to claim 1, characterized in that: The high temperature resistant anti-corrosion coating further comprises a curing catalyst, and the content of the curing catalyst is 0.5 wt % to 2 wt % of the heat resistant silicone resin.

13. A method for producing a high temperature resistant anti-corrosion coating, characterized in that: The manufacturing method of the high temperature resistant anti-corrosion coating comprises: 30 wt % to 45 wt % of filler is prepared at a weight ratio of metal filler to flake filler of 1:2 to 1:3; Pre-dispersing 20 wt % to 40 wt % of the heat-resistant silicone resin, the flake filler and 0.5 wt % to 5 wt % of the film-forming aid to obtain a pre-dispersion liquid; The metal filler and 15 wt % to 30 wt % of a solvent are added to the pre-dispersion liquid and stirred evenly to obtain the high-temperature anti-corrosion coating.

14. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The heat-resistant silicone resin has a refractive index of 1.40 to 1.53 and a 2 / s viscosity.

15. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The heat-resistant silicone resin is a methyl / phenyl modified silicone resin, and in the methyl / phenyl modified silicone resin, based on the total weight of the methyl and phenyl groups in the heat-resistant silicone resin, the content of the methyl group is 20 to 35%, and the content of the phenyl group is 65 to 80%.

16. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The flake filler includes magnesium talc and flake glass in a weight ratio of 2:1 to 1:

2.

17. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The film-forming aid is selected from at least one of alcohol ethers, zirconium alcohols, a mixture of ethylene glycol monobutyl ether / dipropylene glycol butyl ether, or a plasticizer, or a combination thereof.

18. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The solvent is selected from at least one of toluene, xylene, aromatic hydrocarbon solvents or a combination thereof.

19. The method for producing a high temperature resistant anticorrosion coating according to claim 13, characterized in that: The method for manufacturing the high temperature resistant anti-corrosion coating further comprises adding a curing catalyst to the high temperature anti-corrosion coating before use, wherein the content of the curing catalyst is 0.5wt% to 2wt% of the heat resistant silicone resin.

20. The method for producing a high temperature resistant anti-corrosion coating according to claim 19, characterized in that: The curing catalyst is alkoxysilane.

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