Anti-corrosion material for fuel conveying and boiler ash conveying system and application method of anti-corrosion material

Abstract

The invention discloses an anti-corrosion material for a fuel conveying and boiler ash conveying system and an application method of the anti-corrosion material. According to the anti-corrosion material for the fuel conveying and boiler ash conveying system and the application method of the anti-corrosion material, provided by the invention, the anti-corrosion slurry provided by the technology has strong binding force with a pipeline, is not easy to fall off, can be used for preparing the anti-corrosion slurry for the fuel conveying and boiler ash conveying system, and has the advantages that the service life of the anti-corrosion slurry is prolonged, the service life of the anti-corrosion slurry is prolonged, and the service life of the anti-corrosion slurry is prolonged. And the corrosion-resistant slurry has the characteristics of corrosion resistance and wear resistance at the same time through the synergistic cooperation of all the components.

Description

Technical Field

[0001] The present invention belongs to the technical field of corrosion protection of fuel conveying and boiler ash conveying systems, and in particular relates to an corrosion protection material for fuel conveying and boiler ash conveying systems and an application method thereof. Background Art

[0002] Currently, the primary anti-corrosion measure used in fuel transportation and boiler ash conveying systems is to apply a layer of anti-corrosion slurry to the inside of the pipes. However, this method has exposed significant technical drawbacks in practical applications. Specifically, the interface strength between the anti-corrosion layer and the pipe structure is insufficient, resulting in the anti-corrosion layer easily falling off during the medium transportation process, seriously compromising the anti-corrosion effectiveness. This shedding not only shortens the pipeline maintenance cycle and increases operating costs, but also may contaminate the transported medium, further affecting the stability and safety of the system.

[0003] Furthermore, simply applying an anti-corrosion coating to the interior of a pipeline has significant limitations in improving its anti-corrosion effectiveness. This is because the effectiveness and durability of the coating depend not only on the quality of the material itself, but also on multiple factors such as the overall structure, mechanical properties, and weather resistance of the pipeline. Existing conventional pipelines often struggle to meet these complex application requirements. In fuel transportation and boiler ash conveying systems, pipelines must withstand a variety of harsh environments, including high temperatures, high pressures, and corrosive media. Consequently, the requirements for the pipeline's mechanical properties, weather resistance, and anti-corrosion performance are extremely high. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to overcome the deficiencies in the prior art and provide an anti-corrosion material for fuel transportation and boiler ash transportation systems.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: based on the mass fraction of the anti-corrosion material raw materials, the following are included:

[0008] 25-50 parts of urea-formaldehyde resin, 15-35 parts of CMC-Na, 8-20 parts of hexafluorobutyl acrylate, 1-6 parts of graphite powder, 2-7 parts of molybdenum dioxide, 8-15 parts of silicon carbide, 5-15 parts of chlorosulfonated polyethylene varnish, and 2-7 parts of dibutyl phthalate.

[0009] As a preferred solution of the anti-corrosion material for fuel transportation and boiler ash transportation system of the present invention, wherein: in terms of mass fraction of the raw materials of the anti-corrosion material, it includes:

[0010] 35-45 parts of urea-formaldehyde resin, 15-25 parts of CMC-Na, 10-15 parts of hexafluorobutyl acrylate, 2-5 parts of graphite powder, 2-4 parts of molybdenum dioxide, 8-12 parts of silicon carbide, 8-12 parts of chlorosulfonated polyethylene varnish, and 2-5 parts of dibutyl phthalate.

[0011] As a preferred embodiment of the anti-corrosion material for fuel transportation and boiler ash conveying systems described in the present invention, the anti-corrosion material comprises, by weight of raw materials, 40 parts of urea-formaldehyde resin, 20 parts of CMC-Na, 12 parts of hexafluorobutyl acrylate, 3 parts of graphite powder, 3 parts of molybdenum dioxide, 10 parts of silicon carbide, 10 parts of chlorosulfonated polyethylene varnish, and 3 parts of dibutyl phthalate.

[0012] Another object of the present invention is to provide an application method of the anti-corrosion material used in fuel transportation and boiler ash transportation systems.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0014] The anti-corrosion pipes used for fuel transportation and boiler ash conveying systems are divided into inner pipes and outer pipes. The materials of the inner pipes and outer pipes are both ultra-high molecular weight polyethylene. A wire mesh is installed between the two, and the anti-corrosion material is coated on the inner wall of the inner pipe.

[0015] As a preferred embodiment of the method for applying the anti-corrosion material for fuel transportation and boiler ash transportation systems of the present invention, the following steps are described:

[0016] The raw materials of the anti-corrosion material are mixed to obtain an anti-corrosion slurry;

[0017] The inner wall of the inner tube is first coated with a dopamine coating, and then an anti-corrosion slurry is sprayed on the surface of the dopamine coating. After spraying, the coating is heated and solidified, and then cooled. The spraying, heating and solidification, and cooling steps are repeated to obtain a multi-layer anti-corrosion layer.

[0018] As a preferred solution of the application method of the anti-corrosion material for fuel transportation and boiler ash transportation system of the present invention, the spraying temperature of the anti-corrosion slurry is 20-25°C.

[0019] As a preferred solution of the application method of the anti-corrosion material for fuel transportation and boiler ash transportation system of the present invention, the heating temperature of the heating and curing is 90-100°C.

[0020] As a preferred solution of the application method of the anti-corrosion material for fuel transportation and boiler ash transportation systems of the present invention, the heating and curing time is 2 to 6 hours.

[0021] As a preferred solution of the method for applying the anti-corrosion material for fuel transportation and boiler ash transportation system of the present invention, the cooling is performed by air cooling.

[0022] As a preferred solution of the application method of the anti-corrosion material for fuel transportation and boiler ash transportation systems of the present invention, the thickness of the multi-layer anti-corrosion layer is 300-600 μm.

[0023] Beneficial effects of the present invention:

[0024] The anti-corrosion slurry provided by this technology has a strong bonding force with the pipeline and is not easy to fall off. In addition, the anti-corrosion slurry can simultaneously play the role of anti-corrosion and wear resistance through the coordinated cooperation of various components.

[0025] By applying a dopamine layer to the surface of the pipe, the bonding strength between the two can be further enhanced, thereby preventing the coating from falling off. By spraying the anti-corrosion coating multiple times, the bonding strength between the various permeable layers can be achieved, thereby further improving the anti-corrosion effect and preventing the coating from falling off. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0029] Unless otherwise specified, the raw materials used in the present invention are commonly available in the market.

[0030] Example 1

[0031] This embodiment provides an anti-corrosion material for fuel delivery and boiler ash delivery systems and an application method thereof, specifically:

[0032] 1) Preparation of anti-corrosion materials:

[0033] Weigh 40 parts of urea-formaldehyde resin, 20 parts of CMC-Na (sodium carboxymethyl cellulose), 12 parts of hexafluorobutyl acrylate, 3 parts of graphite powder, 3 parts of molybdenum dioxide, 10 parts of silicon carbide, 10 parts of chlorosulfonated polyethylene paint, and 3 parts of dibutyl phthalate, and uniformly blend them to obtain an anti-corrosion slurry.

[0034] 2) Application of anti-corrosion materials:

[0035] The anti-corrosion pipes used for fuel transportation and boiler ash conveying systems are divided into inner pipes and outer pipes, both of which are made of ultra-high molecular weight polyethylene. The anti-corrosion slurry obtained in step 1) is coated on the inner wall of the inner pipe, and a steel wire mesh is set between the inner pipe and the outer pipe. Specifically:

[0036] A dopamine coating is prepared by mixing dopamine hydrochloride (0.4 g / L) + zinc sulfate (0.01 mol / L) + potassium chloride (0.005 mol / L), and the dopamine coating is applied to the inner wall of the inner layer pipe to obtain a dopamine coating;

[0037] Then, add the anti-corrosion slurry obtained in step 1) into a sprayer at 25°C for spraying, heat to 100°C and cure for 4 hours after spraying, air-cool after curing, and repeat the spraying, heating and curing, and cooling steps 4 times to obtain a multi-layer anti-corrosion layer with a thickness of 450 μmd.

[0038] Comparative Example 1

[0039] The difference between this comparative example and Example 1 is that, during the application process of step 2), the inner wall of the inner pipe is not coated with the dopamine coating, and the remaining steps and processes are all referred to Example 1 to obtain the sample of this comparative example.

[0040] Comparative Example 2

[0041] The difference between this comparative example and Example 1 is that the graphite powder, molybdenum dioxide, and silicon carbide in step 1) are omitted, and the remaining steps and processes are referred to Example 1 to obtain the sample of this comparative example.

[0042] The performance tests were performed on the samples obtained in Example 1 and Comparative Examples 1 and 2. The test method was as follows:

[0043] Samples of equal weight were taken from the anti-corrosion coated pipes and fixed in a sandblasting chamber with the anti-corrosion coating facing outward. Sandblasting was performed using a jet sandblasting gun with 180-mesh brown corundum. The blasting time was 10 minutes, the blasting distance was 100 mm, the compressed air pressure was 0.5 MPa, and the blasting angle was 90° vertical. The samples were taken out and weighed after 2 minutes, 4 minutes, 7 minutes, and 10 minutes, and the change in mass of the anti-corrosion coating was used to evaluate the anti-corrosion performance of the coating.

[0044] The mechanical damage resistance of the anti-corrosion layer is tested with reference to GB / T1732-1993 paint film impact resistance test method. The maximum height (cm) at which a 1kg hammer falls on the surface of the sample without causing damage to the anti-corrosion layer is used to represent the mechanical damage resistance.

[0045] The test results are shown in Tables 1 and 2.

[0046] Table 1

[0047]

[0048] It can be seen from the test results in Table 1 and Table 2 that the anti-corrosion slurry provided by the formula of the present invention has a strong bonding force with the pipeline and is not easy to fall off. In addition, the anti-corrosion slurry can simultaneously play the role of anti-corrosion and wear-resistant properties through the coordinated cooperation of various components.

[0049] By applying a dopamine layer to the surface of the pipe, the bonding strength between the two can be further enhanced, thereby preventing the coating from falling off. By spraying the anti-corrosion coating multiple times, the bonding strength between the various permeable layers can be achieved, thereby further improving the anti-corrosion effect and preventing the coating from falling off.

[0050] Example 2

[0051] The difference between this embodiment and embodiment 1 is that the raw material formula of the anti-corrosion material is adjusted to:

[0052] 35 parts of urea-formaldehyde resin, 25 parts of CMC-Na, 15 parts of hexafluorobutyl acrylate, 2 parts of graphite powder, 5 parts of molybdenum dioxide, 8 parts of silicon carbide, 8 parts of chlorosulfonated polyethylene paint, and 5 parts of dibutyl phthalate are uniformly blended to obtain an anti-corrosion slurry;

[0053] The remaining steps and processes are all referred to Example 1 to obtain the anti-corrosion layer of this embodiment.

[0054] Example 3

[0055] The difference between this embodiment and embodiment 1 is that the raw material formula of the anti-corrosion material is adjusted to:

[0056] 50 parts of urea-formaldehyde resin, 25 parts of CMC-Na, 10 parts of hexafluorobutyl acrylate, 5 parts of graphite powder, 4 parts of molybdenum dioxide, 12 parts of silicon carbide, 12 parts of chlorosulfonated polyethylene paint, and 4 parts of dibutyl phthalate are uniformly blended to obtain an anti-corrosion slurry;

[0057] The remaining steps and processes are all referred to Example 1 to obtain the anti-corrosion layer of this embodiment.

[0058] The relevant properties of the coatings of Example 2 and Example 3 were measured, and the results were comparable to those of Example 1.

[0059] Comparative Example 3

[0060] The difference between this comparative example and Example 1 is that CMC-Na is omitted and replaced with an equal amount of urea-formaldehyde resin. The remaining steps are referred to Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0061] Comparative Example 4

[0062] The difference between this comparative example and Example 1 is that hexafluorobutyl acrylate is omitted and replaced with an equal amount of urea-formaldehyde resin. The remaining steps are the same as those of Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0063] Comparative Example 5

[0064] The difference between this comparative example and Example 1 is that the chlorosulfonated polyethylene paint is omitted and replaced with an equal amount of urea-formaldehyde resin. The remaining steps are referred to Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0065] Comparative Example 6

[0066] The difference between this comparative example and Example 1 is that dibutyl phthalate is omitted and replaced with an equal amount of urea-formaldehyde resin. The remaining steps are the same as those of Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0067] The performance of the multi-layer anti-corrosion coatings prepared in Comparative Examples 3 to 6 was tested and compared with Example 1. The results are shown in Table 2.

[0068] Table 2

[0069] index Weight loss / g(10min) Maximum height / cm Example 1 0.12 52 Comparative Example 3 0.38 39 Comparative Example 4 0.42 46 Comparative Example 5 0.47 37 Comparative Example 6 0.25 32

[0070] As can be seen from Table 2, omitting CMC-Na, hexafluorobutyl acrylate, chlorosulfonated polyethylene paint, and dibutyl phthalate in the formula will have a significant impact on the performance of the coating. This is because in the present invention, CMC-Na acts as a thickener and stabilizer to ensure that the slurry is evenly coated and enhances adhesion. After omitting it, the coating is prone to pores and cracks, the penetration of corrosive media is aggravated, the coating adhesion is weakened, and it is easy to peel or wear. Omitting hexafluorobutyl acrylate, due to the lack of hydrophobicity and chemical resistance of fluoride, the coating's resistance to acidic and oxidizing media is significantly weakened, and the surface hardness is also reduced accordingly. After omitting chlorosulfonated polyethylene paint, the coating's chemical corrosion resistance (such as acid, alkali, oxidant) and flexibility are lost, and the coating is prone to cracking and penetration; omitting dibutyl phthalate will result in reduced coating adhesion, easy peeling from the substrate, increased coating brittleness, and weakened resistance to cracking and peeling.

[0071] In addition, in the present invention, CMC-Na, as a water-soluble polymer, is adsorbed on the surface of solid particles in the slurry through hydrogen bonds and van der Waals forces, forming a steric hindrance effect, preventing filler sedimentation, ensuring the uniformity of the slurry, and forming a physical cross-linking network with the polar groups of urea-formaldehyde resin and chlorosulfonated polyethylene paint, thereby improving the cohesion of the slurry and its adhesion to the substrate.

[0072] The inertness of fluoride and the acid and alkali resistance of chlorosulfonated polyethylene paint work synergistically to form a "double barrier" structure (hydrophobic outer layer + chemical-resistant inner layer), further enhancing corrosion resistance. Dibutyl phthalate, as a small molecule plasticizer, is inserted between the molecular chains of urea-formaldehyde resin and chlorosulfonated polyethylene paint, weakening the rigid interaction of the polymer chains and improving the flexibility and crack resistance of the coating. The raw materials work together to improve the mechanical properties and corrosion resistance of the coating.

[0073] Comparative Example 7

[0074] The difference between this comparative example and Example 1 is that the graphite powder is omitted and replaced with an equal amount of molybdenum dioxide. The remaining steps are referred to Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0075] Comparative Example 8

[0076] The difference between this comparative example and Example 1 is that the molybdenum dioxide is omitted and replaced with an equal amount of graphite powder. The remaining steps are referred to Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0077] Comparative Example 9

[0078] The difference between this comparative example and Example 1 is that silicon carbide is omitted and replaced with an equal amount of graphite powder. The remaining steps are referred to Example 1 to obtain the multi-layer anti-corrosion layer of this comparative example.

[0079] The performance of the multi-layer anti-corrosion coatings prepared in Comparative Examples 7 to 9 was tested and compared with Example 1. The results are shown in Table 3.

[0080] Table 3

[0081] index Weight loss / g(10min) Maximum height / cm Example 1 0.12 52 Comparative Example 7 0.20 49 Comparative Example 8 0.22 50 Comparative Example 9 0.16 44

[0082] As shown in Table 3, omitting any of the solid particulate materials in the present invention and replacing them with other solid materials results in a decrease in the overall performance of the coating. This is due to the fact that the graphite powder, molybdenum dioxide, and silicon carbide each play a distinct role in the anti-corrosion coating, resulting in a synergistic effect. The shielding effect and thermal and electrical conductivity of the graphite powder, the corrosion resistance of molybdenum dioxide and its positive impact on coating performance, and the high hardness and wear resistance of silicon carbide collectively enhance the corrosion resistance and mechanical properties of the coating.

[0083] In summary, the present invention provides an anti-corrosion material and an application method for fuel transportation and boiler ash conveying systems. The anti-corrosion slurry provided by this technology has a strong bonding force with the pipeline and is not easy to fall off. Moreover, the anti-corrosion slurry can simultaneously play the role of anti-corrosion and wear-resistant properties through the coordinated cooperation of various components.

[0084] By applying a dopamine layer to the surface of the pipe, the bonding strength between the two can be further enhanced, thereby preventing the coating from falling off. By spraying the anti-corrosion coating multiple times, the bonding strength between the various permeable layers can be achieved, thereby further improving the anti-corrosion effect and preventing the coating from falling off.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An anti-corrosion material for fuel transportation and boiler ash conveying systems, characterized by: Calculated by mass percentage of anti-corrosion material raw materials, including: 25-50 parts of urea-formaldehyde resin, 15-35 parts of CMC-Na, 8-20 parts of hexafluorobutyl acrylate, 1-6 parts of graphite powder, 2-7 parts of molybdenum dioxide, 8-15 parts of silicon carbide, 5-15 parts of chlorosulfonated polyethylene varnish, and 2-7 parts of dibutyl phthalate.

2. The anti-corrosion material for fuel transportation and boiler ash conveying system according to claim 1, characterized in that: Calculated by mass percentage of anti-corrosion material raw materials, including: 35-45 parts of urea-formaldehyde resin, 15-25 parts of CMC-Na, 10-15 parts of hexafluorobutyl acrylate, 2-5 parts of graphite powder, 2-4 parts of molybdenum dioxide, 8-12 parts of silicon carbide, 8-12 parts of chlorosulfonated polyethylene varnish, and 2-5 parts of dibutyl phthalate.

3. The anti-corrosion material for fuel transportation and boiler ash conveying system according to any one of claims 1 or 2, characterized in that: Calculated by mass of the anti-corrosion material raw materials, it includes 40 parts of urea-formaldehyde resin, 20 parts of CMC-Na, 12 parts of hexafluorobutyl acrylate, 3 parts of graphite powder, 3 parts of molybdenum dioxide, 10 parts of silicon carbide, 10 parts of chlorosulfonated polyethylene paint, and 3 parts of dibutyl phthalate.

4. A method for applying an anti-corrosion material for fuel transportation and boiler ash transportation systems, characterized in that: include, The anti-corrosion pipes used for fuel transportation and boiler ash conveying systems are divided into inner pipes and outer pipes. The materials of the inner pipes and the outer pipes are both ultra-high molecular weight polyethylene. A steel wire mesh is installed between the two. The anti-corrosion material described in any one of claims 1 to 3 is coated on the inner wall of the inner pipe.

5. The method for applying the anticorrosive material according to claim 4, wherein: The raw materials of the anti-corrosion material according to any one of claims 1 to 3 are mixed to obtain an anti-corrosion slurry; The inner wall of the inner tube is first coated with a dopamine coating, and then an anti-corrosion slurry is sprayed on the surface of the dopamine coating. After spraying, the coating is heated and solidified, and then cooled. The spraying, heating and solidification, and cooling steps are repeated to obtain a multi-layer anti-corrosion layer.

6. The method for applying the anticorrosive material according to claim 5, wherein: The spraying temperature of the anti-corrosion slurry is 20-25°C.

7. The method for applying the anticorrosive material according to claim 5, wherein: The heating temperature for the heat curing is 90-100°C.

8. The method for applying the anticorrosive material according to claim 7, wherein: The heating and curing time is 2 to 6 hours.

9. The method for applying the anticorrosive material according to claim 5, wherein: The cooling is performed by air cooling.

10. The method for applying the anticorrosive material according to claim 5, wherein: The thickness of the multi-layer anti-corrosion layer is 300 to 600 μm.

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