A high temperature resistant aerosol for isolating welding slag adhesion and preparation method thereof

Abstract

The present invention relates to the technical field of functional chemical new materials, specifically a high-temperature resistant aerosol for isolating welding slag adhesion and a preparation method. The aerosol is composed of a functional film-forming liquid and a propellant; wherein: the composition of the functional film-forming liquid is calculated by weight as follows: 15-20 parts of polyketone resin, 70-75 parts of ethanol, 3-5 parts of stripping agent, 0.2-0.3 parts of dispersant, 0.1-0.3 parts of leveling agent, 0.01-0.03 parts of corrosion inhibitor, and an appropriate amount of viscosity regulator; the stripping agent is obtained by mechanically grinding and modifying spherical inorganic powder and stearate. By using high-temperature resistant polyketone resin and spherical stripping agent in the aerosol, the aerosol can prevent instantaneous high-temperature welding slag from adhering to and burning the surface of metal parts after spraying and film formation, thereby effectively protecting the quality of the welded parts. At the same time, the strippability on the surface of the welded parts is taken into account. After welding is completed, the spray film layer can be easily peeled off and torn off without the need for acid, alkali, or detergent cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of new functional chemical materials, and in particular to a high-temperature resistant aerosol for isolating welding slag adhesion and a preparation method thereof. Background Art

[0002] Metal welding involves rapidly heating the metal workpieces (or the solder) to form a molten zone. The molten pool cools and solidifies before joining. Whether welding with arc, argon arc, laser, or gas flame welding, the localized high temperatures surrounding the molten metal slag cause transient water evaporation or impurity combustion, generating gas shock waves. This causes the molten pool to fluctuate violently and spatter, forming slag. The spattered slag is extremely hot. If it lands on the edge of the weld, it solidifies and adheres to the weld, seriously affecting the quality of the weld. If the slag lands on other surfaces, it adheres to the workpiece, forming slag particles. This not only affects the surface dimensional precision and aesthetics of the workpiece, but can also cause ablation points, reducing corrosion resistance. Minor slag adhesion requires grinding to remove; severe adhesion requires repair welding, which consumes significant labor and time, increasing manufacturing costs.

[0003] Precision laser welding is currently being used in the electronics, automotive, and aerospace industries. Preventing spatter from damaging the surface of precision workpieces is crucial. During the laser welding process, a high-energy-density laser beam strikes the metal, rapidly melting it in a short period of time. Pressure fluctuations within the molten pool can cause the molten metal to be drawn out of the pool, creating spatter. Even tiny spatter adhering to the surface of the weld can leave difficult-to-remove burn marks, severely impacting the surface appearance, dimensional accuracy, and corrosion resistance of precision metal parts, leading to quality defects in the weld.

[0004] To mitigate the negative impact of weld slag adhesion, protective mats are often used during welding operations to prevent slag from directly adhering to the workpiece surface. These mats, primarily made of high-temperature-resistant materials, effectively protect the metal workpiece surface from contamination by weld slag. However, due to the diverse shapes of workpieces, protective mats must be manufactured in a variety of shapes and sizes, making their use extremely inconvenient. Furthermore, protective mats are difficult to effectively protect against welding of small, precision, and irregularly shaped components.

[0005] To improve the quality of precision welding and prevent slag from adhering to the workpiece surface, existing technology uses an anti-sticking agent that is evenly applied to the workpiece surface to effectively prevent slag from adhering to the workpiece. However, this type of anti-sticking agent is inconvenient to use, and the instantaneous temperature of the splashing slag can reach 500-1000°C. The coating layer has limited high-temperature resistance, and the high-temperature slag can easily burn through the anti-sticking agent coating. In addition, the coating layer is difficult to remove after welding, requiring acid, alkali, or detergent to clean the coating, which increases the workload of the welding operation. Summary of the Invention

[0006] To overcome the aforementioned shortcomings of existing technologies and prevent spattered welding slag from adhering to and ablating metal workpieces during precision welding, the present invention proposes a high-temperature-resistant aerosol for isolating welding slag and a preparation method. The goal is to produce an aerosol that, when sprayed on the surface of a metal workpiece being welded, forms a uniform, high-temperature-resistant protective film, preventing slag from adhering and burning the workpiece surface. The film is also easily removable after welding.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] First, the present invention provides a high-temperature resistant aerosol for isolating welding slag adhesion, which is characterized by being composed of a functional film-forming liquid and a propellant in a mass ratio of 100:(30-40); wherein:

[0009] The functional membrane-forming liquid is composed of the following raw materials in parts by weight: 15-20 parts of polyketone resin, 70-75 parts of ethanol, 3-5 parts of stripping agent, 0.2-0.3 parts of dispersant, 0.1-0.3 parts of leveling agent, 0.01-0.03 parts of corrosion inhibitor, and an appropriate amount of viscosity modifier; the stripping agent is obtained by mechanically grinding and modifying spherical inorganic powder and stearate in a mass ratio of 100:(5-7); the viscosity modifier is added in an appropriate amount to adjust the viscosity of the functional membrane-forming liquid to 80-100 mPa·s at 25° C.;

[0010] The propellant is one of nitrogen and carbon dioxide.

[0011] As a preferred embodiment of the present invention, the polyketone resin is selected from a polyketone resin having a hydroxyl value of 90-120 mgKOH / g and a molecular weight of 1400-1600. Polyketone resins have low viscosity when dissolved in ethanol, exhibit good film-forming properties and quick drying after spraying, and exhibit excellent high-temperature resistance. High-molecular-weight polyketone resins exhibit excellent high-temperature resistance.

[0012] Preferably, the spherical inorganic powder is selected from at least one of spherical silica, spherical glass microspheres, and spherical alumina; the average particle size of the spherical inorganic powder is between 1 and 10 µm. Mechanically grinding and modifying the spherical inorganic powder with stearate allows for stable dispersion in the functional film-forming solution. After spray film formation, the spherical release agent prevents excessive adhesion of the film to metal components, enhancing its removability. This also enhances the film's high-temperature resistance, enabling it to withstand temperatures exceeding 500°C.

[0013] As a preference of the present invention, the stearate is at least one of zinc stearate and calcium stearate.

[0014] As a preferred embodiment of the present invention, the dispersant is at least one of sodium pyrophosphate and sodium hexametaphosphate, which can effectively promote the dispersion of the stripping agent in ethanol.

[0015] As a preferred embodiment of the present invention, the leveling agent is polyether-modified polysiloxane, which has extremely low surface tension, good wettability and emulsification and dispersibility.

[0016] Preferably, the corrosion inhibitor is an adsorptive inhibitor, particularly preferably at least one of tallow amine, benzotriazole, octadecylamine, and 2-mercaptobenzothiazole. Adsorptive inhibitors readily form a protective film on metal surfaces, inhibiting contact between the metal and the corrosive medium, thereby preventing aerosol corrosion. Specifically, benzotriazole is a preferred adsorptive inhibitor for welding non-ferrous metals such as copper.

[0017] Preferably, the viscosity modifier is at least one of triethylene glycol and polyvinyl pyrrolidone. A suitable amount of viscosity modifier is added to adjust the viscosity of the functional film-forming component to 90 mPa·s at 25°C. A reasonable viscosity ensures uniform film formation and leveling after spraying. Furthermore, the high viscosity allows for the formation of microbubbles from volatile solvents during aerosol spraying, increasing film thickness and facilitating peeling.

[0018] The present invention selects a polyketone resin dissolved in ethanol and a spherical stripping agent with a high addition amount. By adjusting the viscosity of the functional film-forming liquid to a relatively high viscosity level, the aerosol formed after spraying has excellent film-forming properties. The film dries quickly during spraying, and the formed film layer performs well in a high-temperature environment and can withstand temperatures up to 500°C in a short period of time. It is used to isolate welding slag from adhering to the metal surface during the welding of precision metal workpieces, and its protective effect is significant. By moderately increasing the viscosity, the volatile solvent is moderately wrapped during aerosol spraying to form microbubbles, increasing the film thickness, and the spherical stripping agent prevents the formed film layer from strongly adhering to the metal surface. After the welding is completed, the film layer is easy to peel off.

[0019] Furthermore, the present invention provides a method for preparing a high-temperature resistant aerosol for isolating welding slag adhesion, and the specific preparation method is as follows:

[0020] S1. Spherical inorganic powder and stearate were modified by mechanical grinding in a mass ratio of 100:(5-7) to obtain a stripping agent;

[0021] S2. According to parts by weight, 15-20 parts of polyketone resin and 70-75 parts of ethanol are added to a vertical mill, and the polyketone resin is completely dissolved in ethanol under the impact of the grinding medium by low-speed stirring to form a solution; then, 3-5 parts of a stripper, 0.2-0.3 parts of a dispersant, 0.1-0.3 parts of a leveling agent, and 0.01-0.03 parts of a corrosion inhibitor are added to the solution of the vertical mill, stirred and dispersed at high speed, separated by sieving to remove the grinding medium, and an appropriate amount of a viscosity modifier is added to adjust the viscosity at 25 ° C to 80-100 mPa · s to obtain a functional film-forming liquid;

[0022] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. The propellant is added according to the mass ratio of functional film-forming liquid to propellant of 100:(30-40). After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0023] As a preferred embodiment of the present invention, the mechanical grinding modification in step S1 adopts at least one of a ball mill, a vibration mill, a planetary mill, and a jet mill.

[0024] As a preference of the present invention, the low-speed stirring shaft of the vertical grinding mill in step S2 rotates at 700 r / min; the high-speed stirring shaft rotates at 1300 r / min.

[0025] As a preferred embodiment of the present invention, the grinding media in the vertical mill in step S2 are zirconia ceramic balls with a diameter of 0.4-0.6 mm, and the filling volume of the grinding media is 20-30% of the volume of the solution.

[0026] As a preferred embodiment of the present invention, the pressure after the propellant is charged in step S3 is 0.60-0.75 MPa.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The components of the aerosol of the present invention have good film-forming properties and dry quickly and solidify into a protective film after spraying.

[0029] 2. The aerosol of the present invention is blended with a high-temperature resistant polyketone resin and a spherical stripping agent, and has excellent high-temperature resistance. After the aerosol forms a film, it can prevent the welding slag from falling and burning through the film layer at instantaneous high temperature.

[0030] 3. The aerosol of the present invention adjusts to a higher viscosity, which easily wraps the volatile solvent during spraying to form microbubbles, thereby increasing the film thickness and taking into account both adhesion and peelability on the surface of the metal workpiece. After welding is completed, the spray film layer can be easily peeled off without the need for acid, alkali, or detergent cleaning, greatly simplifying the operation.

[0031] 4. This aerosol is used to prevent welding slag from adhering, significantly resolving the problem of spattered slag damaging the surface quality of welded parts. It easily forms a continuous, uniform protective layer on the surfaces of complex, precision, and irregularly shaped parts. It forms quickly and dries quickly at room temperature, eliminating the need for baking. After welding, the protective layer is easily removed from the metal part, making it convenient to use. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Some of the raw materials involved in the following implementation plan:

[0034] Polyketone resin: CT-130, molecular weight 1450-1550, hydroxyl value 110±10 mgKOH / g, provided by Jinan Changtai Chemical Co., Ltd.

[0035] Spherical silica: model JL-SiO2-W03, average particle size 3 µm, provided by Ningbo Jinlei Nanomaterial Technology Co., Ltd.

[0036] Spherical alumina: model BSL-Al2O3-B10, average particle size 10 μm, provided by Bisley New Materials (Suzhou) Co., Ltd.

[0037] Spherical glass microspheres: average particle size 10 µm, provided by Hebei Wensheng New Material Technology Co., Ltd.

[0038] Example 1

[0039] S1. Spherical silica and calcium stearate were ground in a ball mill at a mass ratio of 100:5 for 20 min to obtain an exfoliating agent;

[0040] S2. According to the weight ratio, 18 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill, and stirred at a low speed of 700 r / min for 30 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 25% of the solution volume; then, 5 parts of a stripping agent, 0.2 parts of a dispersant sodium pyrophosphate, 0.1 parts of a leveling agent polyether-modified polysiloxane, and 0.01 parts of a corrosion inhibitor tallow amine were added to the solution of the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 15 minutes. The grinding medium was separated by sieving and removed, and 0.08 parts of a viscosity modifier triethylene glycol was added to adjust the viscosity at 25°C to 90 mPa·s to obtain a functional film-forming liquid;

[0041] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:35. The container pressure is 0.70 MPa. After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0042] Example 2

[0043] S1. Spherical alumina and zinc stearate were ground in a ball mill at a mass ratio of 100:6 for 30 min to obtain a stripping agent;

[0044] S2. According to the weight ratio, 16 parts of polyketone resin and 70 parts of ethanol were added to a vertical mill, and stirred at a low speed of 700 r / min for 25 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 30% of the solution volume; then, 4 parts of a stripping agent, 0.3 parts of a dispersant sodium hexametaphosphate, 0.1 parts of a leveling agent polyether-modified polysiloxane, and 0.02 parts of a corrosion inhibitor benzotriazole were added to the solution of the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 20 minutes. The grinding medium was separated by sieving and removed, and 0.05 parts of a viscosity modifier polyvinyl pyrrolidone was added to adjust the viscosity at 25°C to 95 mPa·s to obtain a functional film-forming liquid;

[0045] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container and the valve is sealed. The propellant carbon dioxide is added according to a mass ratio of functional film-forming liquid to propellant of 100:40. The container pressure is 0.75 MPa. After weighing test and water bath test, the nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0046] Example 3

[0047] S1. Spherical glass microspheres and zinc stearate were ground in a ball mill at a mass ratio of 100:5 for 30 min to obtain a stripping agent;

[0048] S2. According to the weight ratio, 20 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill, and stirred at a low speed of 700 r / min for 20 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 20% of the solution volume; then, 3 parts of a stripping agent, 0.3 parts of a dispersant sodium hexametaphosphate, 0.1 parts of a leveling agent polyether-modified polysiloxane, and 0.02 parts of a corrosion inhibitor octadecylamine were added to the solution of the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 20 minutes. The grinding medium was separated by sieving to remove the grinding medium, and 0.09 parts of a viscosity modifier triethylene glycol was added to adjust the viscosity at 25°C to 90 mPa·s to obtain a functional film-forming liquid;

[0049] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:30. The container pressure is 0.65 MPa. After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0050] Comparative Example 1

[0051] S1. According to parts by weight, 18 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill and stirred at a low speed of 700 r / min for 30 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 25% of the solution volume; then, 0.2 parts of sodium pyrophosphate as a dispersant, 0.1 parts of polyether-modified polysiloxane as a leveling agent, and 0.01 parts of tallow amine as a corrosion inhibitor were added to the solution in the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 15 minutes. The grinding medium was separated by sieving and separation, and 0.11 parts of triethylene glycol as a viscosity modifier were added to adjust the viscosity at 25°C to 90 mPa·s to obtain a functional film-forming solution;

[0052] S2. The functional film-forming liquid obtained in step S1 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:40. The container pressure is 0.70 MPa. After weighing and water bath testing, a nozzle is installed to obtain an aerosol for isolating welding slag adhesion.

[0053] In this comparative example, the inorganic stripping agent is omitted, and the high temperature resistance of the aerosol film is reduced to a certain extent after film formation, making it difficult to peel off the film layer.

[0054] Comparative Example 2

[0055] S1. Calcium carbonate powder and calcium stearate were ground in a ball mill at a mass ratio of 100:5 for 20 min to obtain a stripping agent;

[0056] S2. According to the weight ratio, 18 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill, and stirred at a low speed of 700 r / min for 30 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 25% of the solution volume; then, 5 parts of a stripping agent, 0.2 parts of a dispersant sodium pyrophosphate, 0.1 parts of a leveling agent polyether-modified polysiloxane, and 0.01 parts of a corrosion inhibitor tallow amine were added to the solution of the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 15 minutes. The grinding medium was separated by sieving and removed, and 0.07 parts of a viscosity modifier triethylene glycol was added to adjust the viscosity at 25°C to 90 mPa·s to obtain a functional film-forming liquid;

[0057] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:35. The container pressure is 0.70 MPa. After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0058] In this comparative example, the stripping agent replaces spherical silicon dioxide with calcium carbonate powder, and it is difficult to peel off the film layer after the aerosol film is formed.

[0059] Comparative Example 3

[0060] S1. According to parts by weight, 18 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill and stirred at a low speed of 700 r / min for 30 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 25% of the solution volume; then, 5 parts of spherical silica, 0.2 parts of sodium pyrophosphate as a dispersant, 0.1 parts of polyether-modified polysiloxane as a leveling agent, and 0.01 parts of tallow amine as a corrosion inhibitor were added to the solution in the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 15 minutes. The grinding medium was separated by sieving and separation, and 0.10 parts of triethylene glycol as a viscosity modifier were added to adjust the viscosity at 25°C to 90 mPa·s to obtain a functional film-forming liquid;

[0061] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:35. The container pressure is 0.70 MPa. After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0062] In this comparative example, the spherical silica was not ground and modified, and its dispersion performance was limited, which affected the film peeling effect.

[0063] Comparative Example 4

[0064] S1. Spherical silica and calcium stearate were ground in a ball mill at a mass ratio of 100:5 for 20 min to obtain an exfoliating agent;

[0065] S2. According to the weight ratio, 18 parts of polyketone resin and 75 parts of ethanol were added to a vertical mill and stirred at a low speed of 700 r / min for 30 minutes. Under the impact of the grinding medium, the polyketone resin was completely dissolved in the ethanol to form a solution; wherein the grinding medium was a zirconia ceramic ball with a diameter of 0.4-0.6 mm, and the grinding medium filling volume was 25% of the solution volume; then, 5 parts of a stripping agent, 0.2 parts of a dispersant sodium pyrophosphate, 0.1 parts of a leveling agent polyether-modified polysiloxane, and 0.01 parts of a corrosion inhibitor tallow amine were added to the solution of the vertical mill, and the mixture was stirred and ground at a high speed of 1300 r / min for 15 minutes. The grinding medium was separated by sieving to obtain a functional film-forming liquid with a viscosity of 57 mPa·s at 25°C;

[0066] S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. Propellant nitrogen is added according to a mass ratio of functional film-forming liquid to propellant of 100:35. The container pressure is 0.70 MPa. After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

[0067] In this comparative example, the viscosity of the functional film-forming liquid was not adjusted, so that the functional film-forming liquid was at a relatively low viscosity level, resulting in unclear microbubbles in the film layer, a dense and thin film layer, and affected the peeling effect.

[0068] To investigate the effectiveness of aerosol film formation on metal surfaces to prevent high-temperature welding slag adhesion and the effectiveness of the protective film peeling, a verification test was conducted by spraying the aerosol onto the metal surface. The aerosol was sprayed onto the clean metal surface with the nozzle held 15 cm from the work surface. Two sprays were applied, one horizontally and one vertically, with a 10-minute interval between each application. After spraying, the sprays were allowed to dry naturally for 30 minutes. A magnesium wire was placed on the film layer and ignited (ignition temperature approximately 500°C). The rapid combustion of the magnesium wire produced an instantaneous high-temperature burn on the film. The ease of peeling was determined by hand-tearing the film. The high-temperature resistance of the film was evaluated by determining whether the peeled film burned through and whether the metal surface burned, as shown in Table 1.

[0069] Table 1:

[0070]

[0071] The aerosol of the present invention utilizes a synergistic dispersion of a high-temperature-resistant polyketone resin and spherical inorganic powder to produce a film with excellent high-temperature resistance and easy peelability. The aerosol is used to isolate welding slag, effectively protecting weld spatter from adhesion and ablation to the welded surface. After welding protection is achieved, the film is easily removed from the metal component, making it convenient to use.

Claims

1. A high temperature resistant aerosol for isolating welding slag adhesion, characterized by: It is composed of functional film-forming liquid and propellant in a mass ratio of 100:(30-40); wherein: The functional membrane-forming liquid is composed of the following raw materials in parts by weight: 15-20 parts of polyketone resin, 70-75 parts of ethanol, 3-5 parts of stripping agent, 0.2-0.3 parts of dispersant, 0.1-0.3 parts of leveling agent, 0.01-0.03 parts of corrosion inhibitor, and an appropriate amount of viscosity modifier; the stripping agent is obtained by mechanically grinding and modifying spherical inorganic powder and stearate in a mass ratio of 100:(5-7); the viscosity modifier is added in an appropriate amount to adjust the viscosity of the functional membrane-forming liquid to 80-100 mPa·s at 25° C.; The propellant is one of nitrogen and carbon dioxide.

2. The high-temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The polyketone resin is selected from a polyketone resin having a hydroxyl value of 90-120 mgKOH / g and a molecular weight of 1400-1600.

3. The high-temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The spherical inorganic powder is selected from at least one of spherical silica, spherical glass microbeads, and spherical alumina; and the average particle size of the spherical inorganic powder is 1-10 μm.

4. The high temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The stearate is at least one of zinc stearate and calcium stearate.

5. The high temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The dispersant is selected from at least one of sodium pyrophosphate and sodium hexametaphosphate.

6. The high temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The leveling agent is polyether modified polysiloxane.

7. The high temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The corrosion inhibitor is selected from at least one of tallow amine, benzotriazole, octadecylamine, and 2-mercaptobenzothiazole.

8. The high temperature resistant aerosol for isolating welding slag adhesion according to claim 1, characterized in that: The viscosity modifier is selected from at least one of triethylene glycol and polyvinyl pyrrolidone.

9. A method for preparing a high temperature resistant aerosol for isolating welding slag adhesion according to any one of claims 1 to 8, characterized in that: The specific preparation steps are as follows: S1. Spherical inorganic powder and stearate were modified by mechanical grinding in a mass ratio of 100:(5-7) to obtain a stripping agent; S2. According to parts by weight, 15-20 parts of polyketone resin and 70-75 parts of ethanol are added to a vertical mill, and the polyketone resin is completely dissolved in ethanol under the impact of the grinding medium by low-speed stirring to form a solution; then, 3-5 parts of a stripper, 0.2-0.3 parts of a dispersant, 0.1-0.3 parts of a leveling agent, and 0.01-0.03 parts of a corrosion inhibitor are added to the solution of the vertical mill, stirred and dispersed at high speed, separated by sieving to remove the grinding medium, and an appropriate amount of a viscosity modifier is added to adjust the viscosity at 25 ° C to 80-100 mPa · s to obtain a functional film-forming liquid; S3. The functional film-forming liquid obtained in step S2 is canned at normal pressure in a tinplate can as a container, and the valve is sealed. The propellant is added according to the mass ratio of functional film-forming liquid to propellant of 100:(30-40). After weighing and water bath testing, a nozzle is installed to obtain a high-temperature resistant aerosol for isolating welding slag adhesion.

10. The method for preparing a high-temperature resistant aerosol for isolating welding slag adhesion according to claim 9, characterized in that: The low-speed stirring shaft of the vertical mill in step S2 rotates at 700 r / min; the high-speed stirring shaft rotates at 1300 r / min; the grinding medium in the vertical mill is zirconia ceramic balls with a diameter of 0.4-0.6 mm, and the grinding medium filling volume is 20-30% of the solution volume.

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