Weather-resistant deformation-resistant heavy-duty anticorrosive coating system

Abstract

The invention discloses a weather-resistant and deformation-resistant heavy anti-corrosion coating system, which belongs to the field of chemical materials, and comprises an epoxy anti-rust primer which comprises the following components in percentage by weight: 50-60% of epoxy resin, 20-30% of anti-rust pigment, 5-10% of curing agent, 10-20% of solvent and 1-5% of assistant, the formula of the organic silicon elastic finish paint comprises the following components in percentage by weight: 20%-30% of organic silicon resin, 5%-20% of pigment, 10%-20% of filler, 2%-5% of a curing agent, 30%-40% of a solvent, 6%-12% of an auxiliary agent and 5%-10% of an elastic component. Amino propyl trimethoxy silane contained in an auxiliary agent in the organic silicon elastic finish paint attacks an epoxy group of bisphenol A epoxy resin in the epoxy antirust primer, so that ring-opening polymerization reaction is carried out, the epoxy groups and the epoxy groups are combined into a whole, new covalent bonds and amino groups are formed, lower epoxy is obtained, and the epoxy antirust primer is formed. And a coating system of the surface layer organic silicon is formed.

Description

Technical Field

[0001] The present invention belongs to the technical field related to chemical materials, and more specifically, particularly relates to a weather-resistant and deformation-resistant heavy anti-corrosion coating system. Background Art

[0002] An anti-corrosion coating is a special coating, and its function is to form a protective layer on various surfaces to extend the service life of materials, reduce the influence of corrosion, decay and other destructive factors. Among them, the epoxy anti-corrosion coating has good mechanical properties, chemical stability, good electrical insulation, low shrinkage rate, good heat resistance, easy processing and low price, etc., so it is widely used.

[0003] The prior art such as the patent document with the publication number of CN103756507B discloses a white epoxy antirust primer. The key points of its technical solution are: calculated by weight parts of its components: 36 - 42 of epoxy resin, 30 - 36 of white composite iron titanate powder, 8 - 12 of calcium phosphite, 8 - 12 of filler, 5 - 10 of anti-settling agent, 1 - 2 of dispersant, 3 - 4 of mixed solvent, and 15 - 25 of curing agent. The present invention does not contain heavy metals such as lead, chromium, mercury, and zinc, and is environmentally friendly; the high-performance steel has better salt spray resistance and salt water resistance than traditional antirust primers;

[0004] The prior art of a white epoxy antirust primer also has the following defects: In use, the existing epoxy anti-corrosion coating has poor weather resistance, and the coating itself is hard and brittle, and is prone to cracking on deformed components, resulting in the failure of the anti-corrosion of the coated profiles. In the face of different and severe environments, the low weather resistance and low elasticity of the epoxy anti-corrosion coating will accelerate the aging and corrosion of the profiles.

[0005] Therefore, the present invention proposes a weather-resistant and deformation-resistant heavy anti-corrosion coating system to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to disclose a weather-resistant and deformation-resistant heavy anti-corrosion coating system for the problems of the existing anti-corrosion coatings. It is composed of an epoxy antirust primer and a silicone elastic topcoat applied on the epoxy antirust primer: calculated by mass percentage, the formula of the epoxy antirust primer is: 50% - 60% of epoxy resin, 20% - 30% of rust-inhibiting pigment, 5% - 10% of curing agent, 10% - 20% of solvent, and 1% - 5% of auxiliary agent;

[0007] The formula of the silicone elastic topcoat is: 20% - 30% of silicone resin, 5% - 20% of pigment, 10% - 20% of filler, 2% - 5% of curing agent, 30% - 40% of solvent, 6% - 12% of auxiliary agent, and 5% - 10% of elastic component;

[0008] The dosage of the above each formula is 100%.

[0009] Preferably, the epoxy resin is bisphenol A type epoxy resin, wherein the bisphenol A type epoxy resin is condensed from bisphenol A and epichlorohydrin under alkaline conditions, washed with water, and refined by removing solvents to form a high molecular compound containing multiple epoxy groups.

[0010] Preferably, the silicone resin includes methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or methylphenyldichlorosilane, and the rust-inhibiting pigment includes iron oxide red, zinc phosphate or zinc powder.

[0011] Preferably, the silicone resin composition includes at least two of methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane and methylphenyldichlorosilane, and the rust-inhibiting pigment composition includes at least two of iron oxide red, zinc phosphate or zinc powder.

[0012] Preferably, the pigment includes titanium dioxide, iron oxide and aluminum powder, the filler includes calcium carbonate, potato starch and talc powder, and the elastic component includes polyether or polyester elastomer.

[0013] Preferably, the pigment composition includes at least one of titanium dioxide, iron oxide and aluminum powder, the filler composition includes at least one of calcium carbonate, potato starch and talc powder, and the elastic component composition includes at least one of polyether or polyester elastomer.

[0014] Preferably, the additive in the silicone elastic topcoat is aminopropyltrimethoxysilane, wherein the aminopropyltrimethoxysilane is an organosilane surfactant composed of a silicate ester group and an amino side chain.

[0015] Preferably, the curing agents in the epoxy rust-inhibiting primer and the silicone elastic topcoat are both polymethylsiloxane, and the solvents in the epoxy rust-inhibiting primer and the silicone elastic topcoat are both xylene.

[0016] Preferably, the aminopropyltrimethoxysilane of the additive in the silicone elastic topcoat reacts chemically with the epoxy groups of the bisphenol A type epoxy resin in the epoxy rust-inhibiting primer to form a covalent bond;

[0017] Among them, the aminopropyltrimethoxysilane of the silicone elastic topcoat and the epoxy groups of the epoxy rust-inhibiting primer successively undergo nucleophilic attack, form an intermediate, proton transfer and chemical bonding reactions.

[0018] Preferably, a weather-resistant and deformation-resistant heavy-duty anti-corrosion coating system includes the following steps:

[0019] Step 1: Clean and pretreat the surface of the substrate;

[0020] Step 2: Apply the epoxy rust-inhibiting primer;

[0021] Step 3: Apply the silicone elastic topcoat before the epoxy anti-rust primer cures, with the epoxy anti-rust primer and the silicone elastic topcoat in equal proportions.

[0022] Step 4: Based on a suitable temperature, a ring-opening bonding reaction occurs between the epoxy anti-rust primer and the silicone elastic topcoat.

[0023] The technical effects achieved by the present invention: In coating construction, by applying the silicone elastic topcoat on the surface of the uncured epoxy anti-rust primer, the weather resistance and elasticity of the coating system can be significantly improved. The epoxy anti-rust primer usually uses bisphenol A epoxy resin as a binder, has good adhesion and flexibility, and excellent water, oil, and chemical resistance. When the additives in the silicone elastic topcoat, such as aminopropyltrimethoxysilane, encounter the epoxy groups in the epoxy anti-rust primer, a chemical reaction will occur. The amino group in trimethoxysilane has high reactivity and can attack the epoxy group and initiate a ring-opening polymerization reaction, thus forming new covalent bonds between the two coatings.

[0024] This chemical bonding not only enhances the adhesion between the topcoat and the primer but also makes the entire coating system more stable and durable. The chemical structure formed by the reaction of the amino group and the epoxy resin not only improves the weather resistance of the epoxy anti-rust primer but also endows the coating with higher elasticity. This elasticity helps to reduce the risk of coating cracking and peeling in response to the expansion and contraction of materials caused by temperature changes. By applying the silicone elastic topcoat on the epoxy anti-rust primer, not only the bonding force between the coatings is enhanced through chemical bonding, but also the weather resistance and elasticity of the entire coating system are significantly improved, providing more comprehensive and durable protection for metal structures. Detailed Embodiments

[0025] The present invention will be described in detail below.

[0026] The present invention and its embodiments are described below. This description is not restrictive, and the actual embodiments are not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, creatively design structural forms and embodiments similar to this technical solution, they shall fall within the protection scope of the present invention.

[0027] During long-term use, the surface of profiles will age and corrode, etc. Especially in some extreme environments, the aging and corrosion of profiles will be accelerated, and anti-corrosion coatings have always been the main anti-corrosion means. The most commonly used anti-corrosion coatings on the market at present are epoxy anti-corrosion coatings. However, epoxy materials have poor weather resistance, and the coating itself is hard and brittle, and it is easy to crack on deformed components, resulting in anti-corrosion failure, unable to meet the requirements of high weather resistance and high elasticity, and unable to meet the requirements for profile anti-corrosion. For this reason, the applicant proposes the following technical solutions:

[0028] A weather-resistant and deformation-resistant heavy-duty anti-corrosion coating system, which consists of an epoxy anti-rust primer and a silicone elastic topcoat applied on the epoxy anti-rust primer. By mass percentage, the formulation of the epoxy anti-rust primer is: epoxy resin 50% - 60%, anti-rust pigment 20% - 30%, curing agent 5% - 10%, solvent 10% - 20% and additive 1% - 5%.

[0029] The formulation of the silicone elastic topcoat is: silicone resin 20% - 30%, pigment 5% - 20%, filler 10% - 20%, curing agent 2% - 5%, solvent 30% - 40%, additive 6% - 12% and elastic component 5% - 10%.

[0030] The dosage of each of the above formulations is 100%.

[0031] Furthermore, the epoxy resin is bisphenol A type epoxy resin, and the bisphenol A type epoxy resin is obtained by condensing bisphenol A and epichlorohydrin under alkaline conditions, followed by washing with water and refining by removing the solvent to form a high molecular compound containing multiple epoxy groups.

[0032] Furthermore, the silicone resin includes methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or methylphenyldichlorosilane, and the anti-rust pigment includes iron oxide red, zinc phosphate or zinc powder.

[0033] Furthermore, the silicone resin composition includes at least two of methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane and methylphenyldichlorosilane, and the anti-rust pigment composition includes at least two of iron oxide red, zinc phosphate or zinc powder.

[0034] Furthermore, the pigment includes titanium dioxide, iron oxide and aluminum powder, the filler includes calcium carbonate, whiting and talc powder, and the elastic component includes polyether or polyester elastomer.

[0035] Furthermore, the pigment composition includes at least one of titanium dioxide, iron oxide and aluminum powder, the filler composition includes at least one of calcium carbonate, titanium dioxide and talc powder, and the elastic component composition includes at least one of polyether or polyester elastomer.

[0036] Furthermore, the additive in the silicone elastic topcoat is aminopropyltrimethoxysilane, and the aminopropyltrimethoxysilane is an organosilane surfactant composed of a silicate ester group and an amino side chain.

[0037] Furthermore, the curing agent in both the epoxy anti-rust primer and the silicone elastic topcoat is polymethylsiloxane, and the solvent in both the epoxy anti-rust primer and the silicone elastic topcoat is xylene.

[0038] Furthermore, the aminopropyltrimethoxysilane in the auxiliary agent of the silicone elastic topcoat reacts chemically with the epoxy groups of the bisphenol A epoxy resin in the epoxy antirust primer to form a covalent bond;

[0039] Among them, the aminopropyltrimethoxysilane of the silicone elastic topcoat and the epoxy groups of the epoxy antirust primer successively undergo nucleophilic attack, formation of an intermediate, proton transfer, and chemical bonding reactions.

[0040] Example 1:

[0041] The epoxy antirust primer specifically includes the following components:

[0042]

[0043] Note: The total proportion of the above components is 100%.

[0044] First, configure a certain proportion of epoxy resin, antirust pigment, calcium phosphite, filler, curing agent, solvent, and auxiliary agent. Then, uniformly mix and disperse the configured epoxy resin, antirust pigment, and filler in a high-speed stirring disperser. Then, add the configured auxiliary agent to improve the construction performance of the coating and the performance of the final coating. Finally, add the configured solvent and curing agent successively to ensure appropriate viscosity and curing time.

[0045] Example 2:

[0046] The silicone elastic topcoat specifically includes the following components:

[0047]

[0048] Note: The total proportion of the above components is 100%.

[0049] First, configure a certain proportion of silicone resin, pigment, elastic component, filler, curing agent, solvent, and auxiliary agent. Mix the silicone resin and pigment, and use a high-speed stirring disperser to ensure uniform dispersion. Then, add the elastic component and filler, and continue stirring until a uniform mixture is formed. Then, add the curing agent and auxiliary agent to increase the construction performance and improve the performance of the coating. Finally, add the solvent to adjust the viscosity of the coating.

[0050] During construction, apply the epoxy antirust primer evenly on the surface of the profile, and apply the silicone elastic topcoat evenly on the surface of the epoxy antirust primer. The epoxy resin in the epoxy antirust primer is bisphenol A epoxy resin. Among them, bisphenol A type epoxy resin is condensed by bisphenol A and epichlorohydrin under alkaline conditions, washed with water, and refined by removing solvents to form a high molecular compound containing multiple epoxy groups. There are epoxy groups inside it, which results in low weather resistance and no high elasticity of the epoxy antirust primer itself, so that the epoxy antirust primer is prone to cracking. A large amount of aminopropyltrimethoxysilane is contained in the additives of the silicone elastic topcoat. When the silicone elastic topcoat is applied on the epoxy antirust primer, the amino group in aminopropyltrimethoxysilane will attack the epoxy group, causing the epoxy group to open the ring and combine with aminopropyltrimethoxysilane to form a new chemical bond. This can improve the high elasticity and weather resistance of the epoxy antirust primer, thus improving the anti-corrosion ability.

[0051] Table 1 shows the influence of the ratio of epoxy antirust primer to silicone elastic topcoat on weather resistance and elasticity:

[0052]

[0053] It can be seen from Table 1 that when the ratio of epoxy antirust primer to silicone elastic topcoat is 1:2, the weather resistance and elasticity of the epoxy antirust primer are very high.

[0054] Furthermore, a weather-resistant and deformation-resistant heavy-duty anti-corrosion coating system includes the following steps:

[0055] Step 1: Clean and pretreat the surface of the substrate;

[0056] Step 2: Apply the epoxy antirust primer;

[0057] Step 3: Apply the silicone elastic topcoat before the epoxy antirust primer is cured, and the epoxy antirust primer and the silicone elastic topcoat are in equal proportions;

[0058] Step 4: Based on a suitable temperature, an open-ring bonding reaction occurs between the epoxy antirust primer and the silicone elastic topcoat.

[0059] Example 3:

[0060] Based on the above, the specific steps are as follows:

[0061] Step 1: First, clean and pretreat the surface of the substrate to ensure that there is no oil, moisture and other impurities on the surface;

[0062] Step 2: Apply the epoxy antirust primer to ensure that the coating is uniform and completely covered;

[0063] Step 3: Immediately apply the silicone elastic topcoat before the epoxy antirust primer is completely cured to ensure good bonding between the two layers of coatings.

[0064] Based on Step 3, in some cases, the amino silicone in the silicone elastic topcoat can react chemically with the epoxy group in the epoxy antirust primer to form a covalent bond, thereby enhancing the bonding force between the two layers;

[0065] The epoxy group (-O-) is a highly reactive group that can undergo ring-opening reactions with various nucleophiles. In the silicone elastic topcoat, aminopropyltrimethoxysilane is a common amino silicone that can react with the epoxy group.

[0066] Among them, aminopropyltrimethoxysilane:

[0067] H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3

[0068] Epoxy group:

[0069] R-O-CH 2 -CH 2 -O-R′

[0070] Where R and R' represent different alkyl or aryl groups.

[0071] The specific microscopic reactions are as follows:

[0072] I. Nucleophilic attack: The amino group (-NH2) in the amino silicone acts as a nucleophile to attack the carbon atom in the epoxy group, resulting in the ring-opening of the epoxy ring;

[0073] The reaction formula is as follows:

[0074] H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3 +R-O-CH 2 -CH 2 -O-R′→H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3 -O-CH 2 -CH 2 -O-R'+R-OH

[0075] II. Formation of intermediate: After nucleophilic attack, the epoxy ring opens to form an intermediate where a carbon atom is connected to the amino group, and at the same time, the oxygen atom of the epoxy group carries a negative charge;

[0076] The reaction formula is as follows:

[0077] H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3 -O - -CH 2 -CH 2 -O-R′

[0078] III. Proton transfer: In a protic environment, the negatively charged oxygen atom of the intermediate accepts a proton (H) to form a stable alcohol group (-OH);

[0079] The reaction formula is as follows:

[0080] H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3 -O - -CH 2 -CH 2 -O-R′+H + →H 2 N-CH 2 CH 2 CH 2 -Si(OCH 3 ) 3 -OH-CH 2 -CH 2 -O-R′

[0081] IV. Chemical bonding: Through the above reactions, a stable chemical bond is formed between the amino siloxane and the epoxy group, and this bonding significantly improves the adhesion between the organosilicon elastic topcoat and the epoxy antirust primer.

[0082] The reaction formula is as follows:

[0083] H 2 N-R-Si(OCH 3 ) 3 -O-CH 2 -CH(OH)-CH 2 -O-R″

[0084] Comparative Example 1

[0085] Table 2 shows the change in gloss retention rate of epoxy antirust primer, silicone elastic topcoat, and the combination of epoxy antirust primer and silicone elastic topcoat over time:

[0086]

[0087] It can be seen from Table 2 that over 365 days in the same environment, when epoxy antirust primer is applied to the surface of three identical profiles respectively, only silicone elastic topcoat is applied, and silicone elastic topcoat is applied on the surface of the epoxy antirust primer, with the passage of time, the gloss retention rate of the profiles with only epoxy antirust primer or only epoxy antirust primer on the surface is lower than that of the profiles with silicone elastic topcoat applied on the surface of the epoxy antirust primer.

[0088] Table 3 shows the influence of different factors on epoxy antirust primer, silicone elastic topcoat, and the combination of epoxy antirust primer and silicone elastic topcoat:

[0089] Test Items Description Epoxy Rust Inhibitive Primer Silicone Elastic Topcoat Combined Coating System Improvement Effect Ultraviolet Radiation Simulate the effect of ultraviolet rays in sunlight on the coating Poor, easy to degrade Excellent, not easy to degrade Excellent, not easy to degrade Significantly improved Temperature Cycling Simulate the performance of the coating in an environment with alternating high and low temperatures Average, easy to crack Good, good elasticity Good, good elasticity Significantly improved Humidity Influence Simulate the performance of the coating in a high humidity environment Average, easy to absorb water and swell Excellent, good water resistance Excellent, good water resistance Significantly improved Salt Spray Test Simulate the corrosion resistance of the coating in marine or saline environments Good, but easy to rust Excellent, corrosion resistant Excellent, corrosion resistant Significantly improved Crack Resistance Simulate the crack resistance of the coating when the substrate deforms Poor, easy to crack Good, good elasticity Good, good elasticity Significantly improved Long-term Weather Resistance Simulate the performance change of the coating during long-term use Average, easy to powder Excellent, long-term stability Excellent, long-term stability Significantly improved

[0090] Comparative Example 2

[0091] It can be seen from Table 3 that when facing ultraviolet radiation, temperature cycling, temperature influence, smoke test, anti-cracking property, and long-term weather resistance, applying epoxy antirust primer on the surface of the profile and then applying silicone elastic topcoat on the surface of the epoxy antirust primer can significantly improve the overall weather resistance and high elasticity compared to only applying epoxy antirust primer or only applying silicone elastic topcoat on the surface of the profile.

[0092] Comparative Example 3

[0093] Under conditions of high temperature, low temperature, high pressure, low pressure, acidic, alkaline, exposure to sunlight and shade, three identical profiles are provided, and silicone elastic topcoat, epoxy antirust primer, and the combination are respectively applied on the surfaces of these three profiles.

[0094] Experiment 1: When providing high temperature conditions while keeping other conditions unchanged, with the passage of time, the surface of the profiles with silicone elastic topcoat and epoxy antirust primer has obvious cracking changes, while the surface of the combination has no obvious changes.

[0095] Experiment 2: When providing low temperature conditions while keeping other conditions unchanged, with the passage of time, the surface of the profiles with silicone elastic topcoat and epoxy antirust primer has obvious cracking changes, while the surface of the combination has no obvious changes.

[0096] Experiment 3: When providing high pressure conditions while keeping other conditions unchanged, with the passage of time, the surface of the profiles with silicone elastic topcoat and epoxy antirust primer has obvious cracking changes, while the surface of the combination has no obvious changes.

[0097] Experiment 4: When providing low-pressure conditions while keeping other conditions unchanged, with the change of days, for the profiles coated with silicone elastic topcoat and epoxy antirust primer, obvious cracking changes occur on the surface, while there are no obvious changes on the surface of the combination body;

[0098] Experiment 5: When providing acidic conditions while keeping other conditions unchanged, with the change of days, for the profiles coated with silicone elastic topcoat and epoxy antirust primer, obvious cracking changes occur on the surface, while there are no obvious changes on the surface of the combination body;

[0099] Experiment 6: When providing alkaline conditions while keeping other conditions unchanged, with the change of days, for the profiles coated with silicone elastic topcoat and epoxy antirust primer, obvious cracking changes occur on the surface, while there are no obvious changes on the surface of the combination body;

[0100] Experiment 7: When providing exposure conditions while keeping other conditions unchanged, with the change of days, for the profiles coated with silicone elastic topcoat and epoxy antirust primer, obvious cracking changes occur on the surface, while there are no obvious changes on the surface of the combination body;

[0101] Experiment 8: When providing shady conditions while keeping other conditions unchanged, with the change of days, for the profiles coated with silicone elastic topcoat and epoxy antirust primer, obvious cracking changes occur on the surface, while there are no obvious changes on the surface of the combination body.

[0102] In summary, by applying silicone elastic topcoat on epoxy antirust primer, not only the bonding force between coatings is enhanced through chemical bonding, but also the weather resistance and elasticity of the entire coating system are significantly improved. This elasticity and weather resistance help reduce the risk of coating cracking and peeling, providing more comprehensive and durable protection for the profile structure.

[0103] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined by the claims.

Claims

1. A weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system, characterized in that: The invention is composed of an epoxy antirust primer and an organic silicon elastic topcoat applied on the epoxy antirust primer: the formula of the epoxy antirust primer is as follows: 50% to 60% epoxy resin, 20% to 30% antirust pigment, 5% to 10% curing agent, 10% to 20% solvent and 1% to 5% auxiliary agent, calculated by mass percentage; The formula of the organosilicon elastic topcoat is: organosilicon resin 20% to 30%, pigment 5% to 20%, filler 10% to 20%, curing agent 2% to 5%, solvent 30% to 40%, additive 6% to 12% and elastic component 5% to 10%; The dosage of the above formulas is 100%.

2. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 1, characterized in that: The epoxy resin is a bisphenol A type epoxy resin, wherein the bisphenol A type epoxy resin is prepared by condensing bisphenol A and epichlorohydrin under alkaline conditions, and then washed with water, desolventized and refined to form a high molecular compound containing multiple epoxy groups.

3. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 1, characterized in that: The organic silicon resin includes methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or methylphenyldichlorosilane, and the antirust pigment includes red iron oxide, zinc phosphate or zinc powder.

4. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 3 is characterized by: The organic silicon resin comprises at least two of methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane and methylphenyldichlorosilane, and the anti-rust pigment comprises at least two of red iron oxide, zinc phosphate or zinc powder.

5. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 1, characterized in that: The pigments include titanium dioxide, iron oxide and aluminum powder, the fillers include calcium carbonate, cornstarch and talcum powder, and the elastic component includes polyether or polyester elastomer.

6. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 5, characterized in that: The pigment composition comprises at least one of titanium dioxide, iron oxide and aluminum powder, the filler composition comprises at least one of calcium carbonate, cornstarch and talcum powder, and the elastic component composition comprises at least one of polyether or polyester elastomer.

7. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 1, characterized in that: The auxiliary agent in the organic silicon elastic topcoat is aminopropyl trimethoxy silane, wherein the aminopropyl trimethoxy silane is an organic silane surfactant composed of a silicate group and an amino side chain.

8. The weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to claim 1, characterized in that: The curing agents in the epoxy anti-rust primer and the organosilicon elastic topcoat are both polymethylsiloxane, and the solvents in the epoxy anti-rust primer and the organosilicon elastic topcoat are both xylene.

9. A weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to any one of claims 1 to 8, characterized in that: The aminopropyl trimethoxysilane in the organic silicone elastic topcoat reacts chemically with the epoxy group of the bisphenol A epoxy resin in the epoxy anti-rust primer to form a covalent bond. The aminopropyltrimethoxysilane of the organic silicon elastic topcoat and the epoxy group of the epoxy anti-rust primer successively undergo nucleophilic attack, intermediate formation, proton transfer and chemical bonding reactions.

10. A weather-resistant, deformation-resistant, heavy-duty anti-corrosion coating system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Clean and pretreat the substrate surface; Step 2: Apply epoxy anti-rust primer; Step 3: Before the epoxy anti-rust primer is cured, apply the silicone elastic topcoat, in which the epoxy anti-rust primer and the silicone elastic topcoat are in equal proportions; Step 4: Based on the appropriate temperature, a ring-opening bonding reaction occurs between the epoxy anti-rust primer and the silicone elastic topcoat.

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