Ceramic coating and preparation method thereof, and ceramic coating and coating method thereof

Abstract

The invention discloses a ceramic coating and a preparation method thereof, and a ceramic coating and a coating method thereof. The ceramic coating comprises a component A and a component B in a weight ratio of 5: 2, the component A is prepared from 8% of biphenyl phthalazinone polyether resin, 25% of biphenyl phthalazinone polyether epoxy resin, 28.0% of phthalonitrile resin, 24.0% of high-temperature hybrid ceramic resin and 15.0% of helical carbon nanotubes; and the component B comprises 70.0% of biphenyl naphthalene polyether amino resin and 30.0% of NMP (N-Methyl Pyrrolidone). Through composite use of multiple high-performance ceramic resin materials and addition of chromium nitride powder for reinforcement, the high temperature resistance and corrosion resistance of the ceramic coating are improved, the ceramic coating can stably work for a long time in an extreme environment, and the service life is prolonged.

Description

Technical Field

[0001] This application belongs to the field of ceramic coating technology, specifically relating to a ceramic coating and its preparation method, and a ceramic coating and its application method. Background Technology

[0002] Metallic materials, especially steel, special steel, stainless steel, aluminum alloys, copper alloys, and titanium alloys, are widely used in various fields of production and daily life due to their excellent comprehensive properties. During the use of metallic materials, they often encounter service environments such as high temperatures, corrosion, wear, and impact. To extend the service life of metallic materials and improve their performance, industry generally uses coatings on the material surface to achieve physical protection.

[0003] Currently, coating materials include polymer coatings, metal coatings, and ceramic coatings. Polymer coatings are generally used in low-temperature environments, with an operating temperature not exceeding 300°C. Metal coatings are mostly prepared using chemical plating, electroplating, or physical vapor deposition processes. Due to the complexity of the processes and the limitations of coating types, metal coatings are only widely used in specific fields. Ceramic materials have natural corrosion resistance and high-temperature resistance properties, and in recent years, ceramic materials have been widely used as coating materials in many high-end manufacturing fields such as aerospace.

[0004] However, the existing ceramic coating formulations are simple, resulting in poor high-temperature resistance and corrosion resistance of the prepared ceramic coatings. They cannot meet the requirements of high-temperature and high-humidity environments, and are prone to cracking or corrosion in such environments, resulting in a low overall service life and failing to provide long-lasting protection for the substrate. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, this application provides a ceramic coating and its preparation method, a ceramic coating and its application method. The ceramic coating is resistant to high temperature and corrosion, has strong adhesion to the substrate, is not easy to fall off, and has a smooth surface with high gloss, thus having good decorative and aesthetic properties.

[0006] Specifically, in order to achieve the above objectives, this application adopts the following technical solution:

[0007] A ceramic coating comprising component A and component B in a weight ratio of 5:2;

[0008] Component A comprises 8% biphenyl naphthalene polyether resin, 25% biphenyl naphthalene polyether epoxy resin, 28.0% o-phthalic anhydride resin, 24.0% high-temperature hybrid ceramic resin, and 15.0% helical carbon nanotubes.

[0009] Component B comprises 70.0% biphenylnaphthalene polyether amino resin and 30.0% NMP.

[0010] In addition, this application also provides a method for preparing a ceramic coating, comprising:

[0011] The following components were mixed uniformly at a weight ratio of 8:25:28:24:15 to obtain component A: Biphenylnaphthalene polyether resin, biphenylnaphthalene polyether epoxy resin, o-phthalic anhydride resin, high-temperature hybrid ceramic resin and spiral carbon nanotubes.

[0012] Biphenylnaphthalene polyether amino resin and NMP were mixed evenly at a weight ratio of 70:30 to obtain component B;

[0013] The components A and B are mixed evenly at a weight ratio of 5:2 and then melt-extruded. After extrusion, the mixture is dispersed into powder to obtain a ceramic coating.

[0014] Further, the components A and B are mixed evenly at a weight ratio of 5:2 and then melt-extruded under nitrogen protection.

[0015] Furthermore, after extrusion, it is dispersed into powder at room temperature.

[0016] In addition, this application also provides a ceramic coating, including chromium nitride powder and the ceramic coating as described above.

[0017] Furthermore, the weight ratio of component A, component B, and chromium nitride powder is 5:2:2.

[0018] In addition, this application also provides a method for applying the ceramic coating as described above, comprising:

[0019] The substrate surface is cleaned and dried to remove all oil, dust, rust and scale; the grease on the substrate surface is removed with solvent, and then the substrate surface is sandblasted with a metal abrasive.

[0020] The ceramic coating as described in claim 1 is added to chromium nitride powder and mixed evenly to obtain a mixed powder;

[0021] The mixed powder is sprayed onto the surface of the substrate under nitrogen protection.

[0022] After spraying, the coating is dried to obtain the ceramic coating as described in claim 5 or 6.

[0023] Furthermore, the metal abrasive has sharp edges; the sandblasting process makes the surface roughness of the substrate meet the Sa2.5 standard, and the spraying operation is carried out within 4 hours after the sandblasting process.

[0024] Furthermore, the spraying temperature is controlled at 280-340℃.

[0025] Furthermore, after the spraying is completed, the substrate surface is dried under nitrogen protection for 30 minutes, and then the substrate surface is dried at room temperature and in air for 3 hours.

[0026] Compared with the prior art, this application has the following advantages:

[0027] By using a combination of various high-performance ceramic resin materials such as biphenyl naphthalene polyether resin, biphenyl naphthalene polyether epoxy resin, ortho-phthalic anhydride resin, high-temperature hybrid ceramic resin and spiral carbon nanotubes, and adding chromium nitride powder for reinforcement, the high temperature resistance and corrosion resistance of the ceramic coating are significantly improved, enabling it to work stably for a long time in extreme environments and extending its service life.

[0028] The ceramic high-temperature and corrosion-resistant ceramic coating formulation of this application has a simple preparation process, is easy to operate, and requires readily available raw materials with low cost, which is conducive to industrial production and application promotion.

[0029] The high-temperature and corrosion-resistant ceramic coating formulation in this application produces a coating with strong adhesion to the substrate, which is not easy to fall off. The coating surface is smooth, has high gloss, and has good decorative and aesthetic properties. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of the application and, together with their description, serve to explain the application, but do not constitute an undue limitation of the application. In the drawings:

[0031] Figure 1 This is a flowchart of the preparation method of the ceramic coating of this application;

[0032] Figure 2 This is a flowchart of the ceramic coating method of this application;

[0033] Figure 3 The image shows the performance test results of the ceramic coating in this application. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0035] In the description of this application, it should be understood that the relationship between the method steps can be sequential or non-sequential, as long as it does not affect the overall technical effect, and therefore should not be construed as a limitation of this application. The following description of this application is merely a description of individual embodiments of the technical solution of this application; other embodiments are not shown in the following description, but this does not mean that this application excludes these other embodiments, nor is the technical solution of this application limited to the specific implementations described below, and the scope of protection of this application is not limited to the specific implementations described below. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0036] It should be noted that if the terms "first," "second," etc., appear in the specification, claims, and accompanying drawings of this application, such descriptions are only used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] In some embodiments, this application provides a ceramic coating comprising component A and component B in a weight ratio of 5:2;

[0038] Component A comprises 8% biphenyl naphthalene polyether resin, 25% biphenyl naphthalene polyether epoxy resin, 28.0% o-phthalic anhydride resin, 24.0% high-temperature hybrid ceramic resin, and 15.0% helical carbon nanotubes.

[0039] Component B comprises 70.0% biphenylnaphthalene polyether amino resin and 30.0% NMP.

[0040] In some embodiments, this application also provides a method for preparing a ceramic coating, comprising:

[0041] S11: Mix biphenyl naphthalene polyether resin, biphenyl naphthalene polyether epoxy resin, o-phthalic anhydride resin, high-temperature hybrid ceramic resin and spiral carbon nanotubes in a weight ratio of 8:25:28:24:15 to obtain component A.

[0042] S12: Mix biphenyl naphthalene polyether amino resin and NMP at a weight ratio of 70:30 to obtain component B;

[0043] S13: Mix component A and component B evenly at a weight ratio of 5:2, then melt-extrude the mixture and disperse it into powder to obtain a ceramic coating.

[0044] Specifically, component A and component B are mixed evenly at a weight ratio of 5:2, then melt-extruded under nitrogen protection, and dispersed into powder at room temperature after extrusion.

[0045] In some embodiments, this application also provides a ceramic coating comprising chromium nitride powder and the ceramic coating as described above, wherein the weight ratio of component A, component B and chromium nitride powder is 5:2:2.

[0046] In some embodiments, this application also provides a method for applying the ceramic coating as described above, comprising:

[0047] S21: Clean and dry the substrate surface to remove all oil, dust, rust and scale; remove grease from the substrate surface with solvent, and then sandblast the substrate surface with a metal abrasive with sharp edges;

[0048] Specifically, the sandblasting process ensures that the surface roughness of the substrate meets the Sa2.5 standard, and the spraying operation is carried out within 4 hours after the sandblasting process.

[0049] S22: Add ceramic coating to chromium nitride powder and mix evenly to obtain mixed powder;

[0050] S23: Spray the mixed powder onto the surface of the substrate under nitrogen protection;

[0051] Specifically, the spraying temperature should be controlled between 280-340℃.

[0052] S24: After spraying, dry the coating to obtain a high-temperature and corrosion-resistant ceramic coating;

[0053] Specifically, after spraying, the substrate surface is dried under nitrogen protection for 30 minutes, and then the substrate surface is dried at room temperature and in air for 3 hours.

[0054] The test results of the substrate surface after coating are as follows: Figure 3 As shown, all performance parameters meet the standard requirements.

[0055] This application first involves sandblasting the substrate surface to effectively remove surface impurities and increase surface roughness, thereby improving the adhesion between the coating and the substrate. Subsequently, a specific ratio of high-temperature and corrosion-resistant ceramic coating is mixed with chromium nitride powder to obtain a mixed powder. Under nitrogen protection, the spraying temperature is controlled within a suitable range before coating the substrate surface. This process ensures the uniformity and density of the coating while avoiding oxidation and contamination during coating. The chromium nitride powder in the mixed powder further enhances the coating's high-temperature and corrosion resistance, enabling it to maintain long-term stability and durability in harsh environments.

[0056] After coating, initial drying is carried out under nitrogen protection, followed by prolonged drying at room temperature and in air to ensure complete curing. The resulting high-temperature and corrosion-resistant ceramic coating exhibits excellent adhesion, smoothness, and gloss, making it not only aesthetically pleasing but also resistant to erosion from harsh environments such as high temperatures and corrosion, providing effective protection for the substrate.

[0057] This application presents a high-performance, high-temperature and corrosion-resistant ceramic coating by optimizing the coating formulation and coating process. This coating not only possesses excellent decorative and aesthetic qualities but also maintains long-term stability and durability under harsh environments such as high temperatures and corrosion, providing reliable protection for the substrate.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims. The selected and described embodiments are intended to best elucidate the principles of this application and its practical application, thereby enabling other those skilled in the art to best utilize this application with various modifications suitable for the contemplated specific purpose, as well as the various described embodiments.

Claims

1. A ceramic coating, characterized in that, It includes component A and component B in a weight ratio of 5:2; Component A comprises 8% biphenyl naphthalene polyether resin, 25% biphenyl naphthalene polyether epoxy resin, 28.0% o-phthalic anhydride resin, 24.0% high-temperature hybrid ceramic resin, and 15.0% helical carbon nanotubes. Component B comprises 70.0% biphenylnaphthalene polyether amino resin and 30.0% NMP.

2. A method for preparing a ceramic coating, characterized in that, include: The following components were mixed uniformly at a weight ratio of 8:25:28:24:15 to obtain component A: Biphenylnaphthalene polyether resin, biphenylnaphthalene polyether epoxy resin, o-phthalic anhydride resin, high-temperature hybrid ceramic resin and spiral carbon nanotubes. Biphenylnaphthalene polyether amino resin and NMP were mixed evenly at a weight ratio of 70:30 to obtain component B; The components A and B are mixed evenly at a weight ratio of 5:2 and then melt-extruded. After extrusion, the mixture is dispersed into powder to obtain a ceramic coating.

3. The method for preparing ceramic coating according to claim 2, characterized in that: After the components A and B are mixed evenly at a weight ratio of 5:2, they are melt-extruded under nitrogen protection.

4. The method for preparing ceramic coating according to claim 3, characterized in that: After extrusion, it is dispersed into powder at room temperature.

5. A ceramic coating, characterized in that... Including chromium nitride powder and the ceramic coating as described in claim 1.

6. The ceramic coating according to claim 5, characterized in that: The weight ratio of component A, component B, and chromium nitride powder is 5:2:

2.

7. A method for applying a ceramic coating as described in claim 5 or 6, characterized in that, include: Clean and dry the substrate surface to remove all oil, dust, rust, and scale; Solvents are used to remove grease from the surface of the substrate, and then metal abrasives are used to sandblast the surface of the substrate. The ceramic coating as described in claim 1 is added to chromium nitride powder and mixed evenly to obtain a mixed powder; The mixed powder is sprayed onto the surface of the substrate under nitrogen protection. After spraying, the coating is dried to obtain the ceramic coating as described in claim 5 or 6.

8. The coating method according to claim 7, characterized in that: The metal abrasive has sharp edges; the sandblasting process makes the surface roughness of the substrate meet the Sa2.5 standard, and the spraying operation is carried out within 4 hours after the sandblasting process.

9. The coating method according to claim 7, characterized in that: The spraying temperature should be controlled between 280-340℃.

10. The coating method according to claim 7, characterized in that: After spraying, dry the substrate surface under nitrogen protection for 30 minutes, and then dry the substrate surface at room temperature and in air for 3 hours.

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