Heavy-duty anticorrosive coating liquid capable of intelligently identifying hydrogen sulfide gas as well as preparation method and application of heavy-duty anticorrosive coating liquid

Abstract

The invention provides a heavy anti-corrosion coating liquid capable of intelligently identifying hydrogen sulfide gas, which comprises the following substances in parts by mass: a component A: 50-70 parts of polyaspartic acid ester polyurea; 0.3 to 0.6 part of a dispersant; 0.3 to 0.6 part of a leveling agent; 0.3 to 0.6 part of an organic silicon defoaming agent; 2-8 parts of a litmus function response agent; 2-8 parts of a corrosion inhibitor; 1-6 parts of an ultraviolet light absorber; 1-6 parts of a stabilizer; 2 to 20 parts of rutile type titanium dioxide; 10 to 20 parts of modified silicon micro powder; 2 to 6 parts of wet-process sericite powder; 0.2 to 0.5 part of a thixotropic anti-settling agent; 5-15 parts of a special diluent; the component B is an aliphatic isocyanate prepolymer curing agent; the mass fraction ratio of the component A to the component B is (3-5): 1. The layer liquid is applied to solve the problems that parts such as petrochemical valves, flanges and pipelines are sensitive and easy to corrode and the like, and can also identify and early warn the risk of hydrogen sulfide leakage, so that the potential safety hazard is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent identification of hydrogen sulfide gas in petrochemical valves, flanges, pipelines and other parts. Specifically, it relates to a heavy anti-corrosion coating for intelligent identification of hydrogen sulfide gas, a preparation method thereof and an application. Background Art

[0002] There is a risk of hydrogen sulfide leakage in petrochemical valves, flanges, pipelines and other parts. Hydrogen sulfide is a highly toxic gas, with irritation and asphyxiation properties. When the human body inhales hydrogen sulfide with a concentration higher than 1000 ppm, sudden death may occur; when the concentration of hydrogen sulfide molecules in the air reaches 15 ppm, long-term exposure to personnel will cause loss of consciousness and inactivation of the olfactory system. In the exploitation of oil and natural gas, hydrogen sulfide gas is sometimes associated. On the one hand, hydrogen sulfide gas causes corrosion problems, and on the other hand, it also poses great safety hazards. Hydrogen sulfide enters the gathering and transportation system from the underground wellbore until it is separated and removed by reaction, passing through processes such as valves, flanges, and pipelines. These areas are corrosion-sensitive and prone to gas leakage parts. Any leakage of hydrogen sulfide gas will result in extremely dangerous consequences; at the same time, the special-shaped structures of parts such as valves, flanges, and pipelines are relatively complex. Conventional anti-corrosion coatings usually have defects such as corner gaps, and the anti-corrosion effect is relatively poor, and they cannot achieve intelligent color change response to hydrogen sulfide gas, posing great safety hazards. Summary of the Invention

[0003] In view of this, on the one hand, the present invention provides a heavy anti-corrosion coating liquid for intelligent identification of hydrogen sulfide gas, including: Component A: Polyaspartic acid ester polyurea, 50 - 70 parts; dispersant, 0.3 - 0.6 parts; leveling agent, 0.3 - 0.6 parts; silicone defoamer, 0.3 - 0.6 parts; litmus function responder, 2 - 8 parts; corrosion inhibitor, 2 - 8 parts; ultraviolet absorber, 1 - 6 parts; stabilizer, 1 - 6 parts; rutile titanium dioxide 2 - 20 parts; modified silicon differential, 10 - 20 parts; wet-process sericite powder, 2 - 6 parts; thixotropic anti-settling agent, 0.2 - 0.5 parts; special diluent, 5 - 15 parts; Component B: Aliphatic isocyanate prepolymer curing agent; The mass fraction ratio of the Component A to the Component B is 3 - 5:1.

[0004] Further, the component A comprises the following substances in parts by mass: polyaspartic acid ester polyurea, 60 parts; dispersant, 0.3 part; leveling agent, 0.4 part; silicone defoamer, 0.4 part; litmus functional responder, 5 parts; corrosion inhibitor, 5 parts; ultraviolet absorber, 3 parts; stabilizer, 3 parts; rutile titanium dioxide, 8 parts; modified silicon differential, 12 parts; wet-process sericite powder, 5 parts; thixotropic anti-settling agent, 0.5 part; special diluent, 5 parts; the mass ratio of the component A to the component B is 1:0.2 - 0.3.

[0005] Further, the component A comprises the following substances in parts by mass: polyaspartic acid ester polyurea, 60 parts; dispersant, 0.5 part; leveling agent, 0.3 part; silicone defoamer, 0.3 part; litmus functional responder, 2 parts; corrosion inhibitor, 5 parts; ultraviolet absorber, 4 parts; stabilizer, 4 parts; rutile titanium dioxide, 6 parts; modified silicon differential, 8 parts; wet-process sericite powder, 4.3 parts; thixotropic anti-settling agent, 0.3 part; special diluent, 5.3 parts; the mass ratio of the component A to the component B is 4:1. Further, the special diluent comprises mineral oil and castor oil, and the mass ratio thereof is 1:1.

[0006] Further, the dispersant is a modified polyurethane high polymer.

[0007] Further, the corrosion inhibitor is polyaniline.

[0008] Further, the ultraviolet absorber is a benzotriazole ultraviolet absorber.

[0009] Further, the stabilizer is a light hindered amine stabilizer.

[0010] Further, the thixotropic anti-settling agent is a polyamide wax thixotropic anti-settling agent.

[0011] Further, the leveling agent is a fluorocarbon-modified polyacrylate.

[0012] The intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid provided by the present invention uses polyaspartic acid ester polyurea anti-corrosion coating as a film-forming resin, and adds a litmus functional responder to the component A of the polyaspartic acid ester polyurea anti-corrosion coating containing polyaniline; when hydrogen sulfide gas encounters the litmus functional responder, intelligent color change occurs; a polyaniline green corrosion inhibitor is used, and a dense oxide film (passivation film) is formed on the surface of the metal substrate by relying on the oxidation-reduction property of polyaniline, and the formation of the passivation film greatly delays the corrosion of the metal; similarly, based on the oxidation-reduction property of polyaniline, while polyaniline oxidizes the metal to form a dense passivation film, polyaniline is reduced, and the reduced polyaniline is an insulator, which prevents the transfer of corrosion charges; ultraviolet absorbers, light hindered amine stabilizers, and rutile titanium dioxide are used to improve the light and anti-aging performance of the anti-corrosion material.

[0013] On the other hand, the present invention also discloses a preparation method of an intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas, which includes the following steps: Preparation of component A: A preset mass fraction of polyaspartic acid ester polyurea, special diluent, modified polyurethane high polymer, litmus functional responder, polyaniline green corrosion inhibitor, ultraviolet absorber, light hindered amine stabilizer, rutile titanium dioxide, and wet sericite powder are dispersed and fused together at high speed, stirred evenly, and the fineness of the slurry is ground to a preset value; then a preset mass fraction of fluorocarbon modified polyacrylate, silicone defoamer, and polyamide wax thixotropic anti-settling agent are added and stirred evenly to obtain the component A solution; Preparation of the anti-corrosion coating liquid: A preset mass fraction of aliphatic isocyanate prepolymer curing agent is added to the component A solution and stirred evenly to obtain the anti-corrosion coating liquid.

[0014] The preparation method of the intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas provided by the present invention is simple to operate. The intelligent recognition heavy anti-corrosion coating liquid prepared by this method can not only detect the generation of hydrogen sulfide gas, but also delay the corrosion of metals, and has light and aging resistance performance.

[0015] On the third aspect, the present invention also discloses an intelligent recognition heavy anti-corrosion coating for hydrogen sulfide gas. The intelligent recognition heavy anti-corrosion coating liquid described in any one of the above is applied to parts such as valves, flanges, and pipelines in petrochemical industry, and an intelligent recognition heavy anti-corrosion coating for hydrogen sulfide gas is formed on its surface.

[0016] The intelligent recognition heavy anti-corrosion coating for hydrogen sulfide gas provided by the present invention can detect the generation of hydrogen sulfide gas, delay the corrosion of the coated metals, and has light and aging resistance performance.

[0017] On the fourth aspect, the present invention also discloses an application of the intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas. The intelligent recognition heavy anti-corrosion coating liquid described in any one of the above is applied to parts such as valves, flanges, and pipelines in petrochemical industry.

[0018] The application of the intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas provided by the present invention not only solves the problems of sensitivity and easy corrosion of parts such as valves, flanges, and pipelines in petrochemical industry, but also can identify and warn the risk of hydrogen sulfide leakage, reducing potential safety hazards. Description of the Drawings

[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 A method for preparing a heavy anti-corrosion coating liquid for intelligent identification of hydrogen sulfide gas provided by an embodiment of the present invention. Specific embodiments

[0020] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0021] An embodiment of the present invention discloses a heavy anti-corrosion coating liquid for intelligent identification of hydrogen sulfide gas, including: Component A: polyaspartic acid ester polyurea, 50 - 70 parts; dispersant, 0.3 - 0.6 part; leveling agent, 0.3 - 0.6 part; silicone defoamer, 0.3 - 0.6 part; litmus function responder, 2 - 8 parts; corrosion inhibitor, 2 - 8 parts; ultraviolet absorber, 1 - 6 parts; stabilizer, 1 - 6 parts; rutile titanium dioxide 2 - 20 parts; modified silicon differential, 10 - 20 parts; wet-process sericite powder, 2 - 6 parts; thixotropic anti-settling agent, 0.2 - 0.5 part; special diluent, 5 - 15 parts; Component B: aliphatic isocyanate prepolymer curing agent; the mass fraction ratio of Component A to Component B is 3 - 5:1.

[0022] In a preferred embodiment disclosed by the present invention, Component A includes the following substances in parts by mass: polyaspartic acid ester polyurea, 60 parts; dispersant, 0.3 part; leveling agent, 0.4 part; silicone defoamer, 0.4 part; litmus function responder, 5 parts; corrosion inhibitor, 5 parts; ultraviolet absorber, 3 parts; stabilizer, 3 parts; rutile titanium dioxide 8 parts; modified silicon differential, 12 parts; wet-process sericite powder, 5 parts; thixotropic anti-settling agent, 0.5 part; special diluent, 5 parts; the mass fraction ratio of Component A to Component B is 1:0.2 - 0.3.

[0023] In a preferred embodiment disclosed by the present invention, Component A includes the following substances in parts by mass: polyaspartic acid ester polyurea, 60 parts; dispersant, 0.5 part; leveling agent, 0.3 part; silicone defoamer, 0.3 part; litmus function responder, 2 parts; corrosion inhibitor, 5 parts; ultraviolet absorber, 4 parts; stabilizer, 4 parts; rutile titanium dioxide 6 parts; modified silicon differential, 8 parts; wet-process sericite powder, 4.3 parts; thixotropic anti-settling agent, 0.3 part; special diluent, 5 parts; the mass fraction ratio of Component A to Component B is 4:1.

[0024] The special diluent includes mineral oil and castor oil, and their mass ratio is 1:1.

[0025] Specifically, the wet-process sericite can shield ultraviolet light irradiation, improve the weather resistance of the coating, delay powdering and discoloration, and its two-dimensional flaky structure with a high aspect ratio can enhance the comprehensive mechanical properties of the coating, resist water penetration and cracking, enhance stain resistance and self-cleaning properties, and at the same time improve the acid resistance, alkali resistance and anti-corrosion properties of the coating.

[0026] In the above embodiment, the rutile titanium dioxide is preferably rutile titanium dioxide CR828 treated with zirconia / aluminum oxide coating and special organic treatment, which has high gloss, high weather resistance and high hiding power, can enhance the chemical stability of the anti-corrosion coating, improve the hiding power, tinting strength, corrosion resistance, light resistance and weather resistance, enhance the mechanical strength and adhesion of the coating film, avoid cracking and peeling, prevent ultraviolet rays and moisture from passing through, and extend the service life of the object.

[0027] In this embodiment, the dispersant is a modified polyurethane polymer, preferably AFCONA-PF123.

[0028] In this embodiment, the corrosion inhibitor is polyaniline.

[0029] In this embodiment, the ultraviolet absorber is a benzotriazole ultraviolet absorber, preferably Tinuvin1130.

[0030] In this embodiment, the stabilizer is a light hindered amine stabilizer, preferably TINUVIN292. The TINUVIN 292 light hindered amine stabilizer mainly captures free radicals generated during the photoaging of the coating through a free radical scavenger, including alkyl free radicals, alkoxy free radicals, peroxy free radicals, etc., and blocks the further oxidative damage of these active species to the polymer network.

[0031] Specifically, Tinuvin 1130 benzotriazole ultraviolet absorber and TINUVIN 292 light hindered amine stabilizer are selected as the system ultraviolet light stabilizers. The Tinuvin 1130 benzotriazole ultraviolet absorber can absorb harmful ultraviolet radiation and dissipate the energy in the form of heat without causing a photosensitization reaction.

[0032] In this embodiment, the thixotropic anti-settling agent is a polyamide wax thixotropic anti-settling agent.

[0033] In this embodiment, the leveling agent is a fluorocarbon-modified polyacrylate, preferably AFCONA-3670.

[0034] In this embodiment, the defoamer is preferably AFCONA-2045.

[0035] The intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid provided by the present invention uses polyaspartic ester polyurea anti-corrosion coating as the film-forming resin, and adds a litmus functional responder to component A of the polyaspartic ester polyurea anti-corrosion coating containing polyaniline; when hydrogen sulfide gas encounters the litmus functional responder, it undergoes intelligent color change; a polyaniline green corrosion inhibitor is used, and a dense oxide film (passivation film) is formed on the surface of the metal substrate by relying on the oxidation-reduction property of polyaniline. The formation of the passivation film greatly delays the corrosion of the metal; also based on the oxidation-reduction property of polyaniline, while polyaniline oxidizes the metal to form a dense passivation film, polyaniline is reduced, and the reduced polyaniline is an insulator, preventing the transfer of corrosion charges; ultraviolet absorbers, light hindered amine stabilizers, and rutile titanium dioxide are used to improve the light and aging resistance of the anti-corrosion material.

[0036] In another embodiment of the present invention, a preparation method of an intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid is also disclosed. The specific embodiments are as follows Example 1 60 parts of polyaspartic ester polyurea, 5 parts of mineral oil and 5 parts of castor oil as special diluents, 0.5 part of modified polyurethane high polymer AFCONA - PF123 dispersant, 2 parts of litmus functional responder, 5 parts of polyaniline green corrosion inhibitor, 4 parts of ultraviolet absorber, 4 parts of light hindered amine stabilizer, 6 parts of rutile titanium dioxide, 4.3 parts of wet ground sericite powder are used. These components are dispersed at high speed for 20 minutes; then the slurry is ground to a fineness of less than or equal to 50 μm. Then the components are stirred evenly, and 0.3 part of fluorocarbon modified polyacrylate AFCONA - 3670 leveling agent, 0.3 part of silicone AFCONA - 2045 defoaming agent, and 0.3 part of polyamide wax thixotropic anti-settling agent are added to obtain the component A solution. An aliphatic isocyanate prepolymer curing agent is added to the A solution and stirred to obtain the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid, wherein the mass ratio of component A to component B is 4:1.

[0037] Example 2 Mix 55 parts of polyaspartate polyurea, 10 parts of mineral oil and 10 parts of special diluent for castor oil, 0.5 part of modified polyurethane high polymer AFCONA-PF123 dispersant, 2 parts of litmus functional responsive agent, 5 parts of polyaniline green corrosion inhibitor, 4 parts of ultraviolet absorber, 4 parts of light hindered amine stabilizer, 5 parts of rutile titanium dioxide, and 5.3 parts of wet ground sericite powder. Disperse these components at high speed for 20 minutes; then grind the slurry to a fineness less than or equal to 50 μm, and then stir the components evenly. Add 0.3 part of fluorocarbon modified polyacrylate AFCONA-3670 leveling agent, 0.3 part of silicone AFCONA-2045 defoaming agent, and 0.3 part of polyamide wax thixotropic anti-settling agent to obtain Component A; add aliphatic isocyanate prepolymer curing agent to the A solution and stir to obtain the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid. Among them, the mass ratio of Component A to Component B is 4:1.

[0038] The preparation method of the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid provided by the present invention is simple to operate. The intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid prepared by this method can not only detect the generation of hydrogen sulfide gas, but also delay the corrosion of metals, and has anti-light and anti-aging properties.

[0039] The third aspect of the present invention also discloses an intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating. Apply the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid described in any one of the above to parts such as valves, flanges, and pipelines in petrochemical industry, and form an intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating on its surface.

[0040] The intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating provided by the present invention can realize the color change effect of the anti-corrosion coating for intelligent recognition of hydrogen sulfide gas, has excellent heavy anti-corrosion performance, and meets the anti-corrosion requirements of special-shaped parts in working conditions with extremely low to extreme corrosive levels of C1 to CX.

[0041] The fourth aspect of the present invention also discloses an application of the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid. Apply the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid described in any one of the above to parts such as valves, flanges, and pipelines in petrochemical industry.

[0042] The application of the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid provided by the present invention not only solves the problems of sensitivity and easy corrosion of parts such as valves, flanges, and pipelines in petrochemical industry, but also can identify and warn the risk of hydrogen sulfide leakage, reducing potential safety hazards.

[0043] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0044] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas, characterized in that It includes substances in the following parts by mass: Component A: Polyaspartic acid ester polyurea, 50 - 70 parts; dispersant, 0.3 - 0.6 part; leveling agent, 0.3 - 0.6 part; silicone defoamer, 0.3 - 0.6 part; litmus functional responsive agent, 2 - 8 parts; corrosion inhibitor, 2 - 8 parts; ultraviolet absorber, 1 - 6 parts; stabilizer, 1 - 6 parts; rutile titanium dioxide, 2 - 20 parts; modified silicon differential, 10 - 20 parts; wet-process sericite powder, 2 - 6 parts; thixotropic anti-settling agent, 0.2 - 0.5 part; special diluent, 5 - 15 parts; Component B: Aliphatic isocyanate prepolymer curing agent; The mass fraction ratio of Component A to Component B is 3 - 5:

1.

2. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to claim 1, characterized in that Component A includes substances in the following parts by mass: Polyaspartic acid ester polyurea, 60 parts; dispersant, 0.3 part; leveling agent, 0.4 part; silicone defoamer, 0.4 part; litmus functional responsive agent, 5 parts; corrosion inhibitor, 5 parts; ultraviolet absorber, 3 parts; Stabilizer, 3 parts; Rutile titanium dioxide, 8 parts; modified silicon differential, 12 parts; Wet-process sericite powder, 5 parts; thixotropic anti-settling agent, 0.5 part; special diluent, 5 parts; The mass parts ratio of Component A to Component B is 1:0.2 - 0.

3.

3. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to claim 1, characterized in that Component A includes substances in the following parts by mass: Polyaspartic acid ester polyurea, 60 parts; dispersant, 0.5 part; leveling agent, 0.3 part; silicone defoamer, 0.3 part; litmus functional responsive agent, 2 parts; Corrosion inhibitor, 5 parts; ultraviolet absorber, 4 parts; stabilizer, 4 parts; rutile titanium dioxide, 6 parts; modified silicon differential, 8 parts; wet-process sericite powder, 4.3 parts; thixotropic anti-settling agent, 0.3 part; special diluent, 5.3 parts; The mass parts ratio of Component A to Component B is 4:

1.

4. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The special diluent includes mineral oil and castor oil, and their mass ratio is 1:

1.

5. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The dispersant is a modified polyurethane high polymer.

6. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The corrosion inhibitor is polyaniline.

7. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The ultraviolet absorber is a benzotriazole ultraviolet absorber.

8. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The stabilizer is a light hindered amine stabilizer.

9. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The thixotropic anti-settling agent is a polyamide wax thixotropic anti-settling agent.

10. The intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas according to any one of claims 1-3, characterized in that The leveling agent is a fluorocarbon modified polyacrylate.

11. A preparation method of an intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas, characterized in that It includes the following steps: Preparation of Component A: Mix the preset parts by mass of polyaspartic acid ester polyurea, special diluent, modified polyurethane high polymer, litmus functional responsive agent, polyaniline green corrosion inhibitor, ultraviolet absorber, light hindered amine stabilizer, rutile titanium dioxide, wet-process sericite powder together by high-speed dispersion, and stir evenly; then add the preset parts by mass of fluorocarbon modified polyacrylate, silicone defoamer, polyamide wax thixotropic anti-settling agent, and stir evenly to obtain the Component A solution; Preparation of anti-corrosion coating liquid: Add the preset parts by mass of aliphatic isocyanate pre polymer curing agent to the Component A solution, and stir evenly to obtain the anti-corrosion coating liquid.

12. An intelligent recognition heavy anti-corrosion coating for hydrogen sulfide gas, characterized in that Apply the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid according to any one of claims 1 - 9 on parts such as valves, flanges, and pipelines in petrochemical industry, and form an intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating on its surface.

13. An application of the intelligent recognition heavy anti-corrosion coating liquid for hydrogen sulfide gas as described in any one of claims 1-10, characterized in that, Apply the intelligent recognition hydrogen sulfide gas heavy anti-corrosion coating liquid to parts such as valves, flanges, and pipelines in petrochemical industry.

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