Preservative compositions, methods of making and using the same

Abstract

The present application relates to the field of aerospace, in particular to a preservative composition, a preparation method and application thereof. The preservative composition contains a film-forming resin component and a lubricant. The preservative composition of the present application adopts a film-forming resin component combined by specific soft and hard resins, and cooperates with a specific content of lubricant, to form a multi-level composite coating structure with soft resin linking hard resin as the core and gap filling lubricant. The preservative composition has good film-forming performance and adhesion, especially excellent flexibility and low-temperature resistance, and can be used for surface treatment of an airplane.

Description

Technical Field

[0001] This invention relates to the field of aerospace, and more specifically to a preservative composition, its preparation method, and its application. Background Technology

[0002] Metal corrosion is one of the major challenges faced in the daily operation of aircraft. Historically, there have been numerous serious air disasters caused by aircraft metal corrosion. Therefore, preventing and addressing aircraft metal corrosion is a crucial aspect of routine aircraft maintenance. In the work of preventing aircraft metal corrosion, surface treatment and the application of anti-corrosion paint are the primary protective measures. However, anti-corrosion paint cannot cover all parts of the aircraft, especially metal joints and bolt connections in structural components. These areas are also prone to moisture accumulation and even water buildup. Especially when aircraft operate near the sea, saltwater can accumulate, leading to problems such as potential corrosion and stress corrosion, which can have serious consequences.

[0003] To address the aforementioned issues, corrosion inhibitors are needed to apply a new layer of protection to aircraft during routine maintenance and operation. Corrosion inhibitors are chemical products composed of solvents, resins, and various additives. They possess strong penetrability and water-repellent properties. After being sprayed onto the surface of aircraft metal materials or anti-corrosion primers, they can penetrate into the gaps at metal joints and bolt connections, as well as cracks and defects in the surface of old primers. After drying, they form a transparent coating of tens of micrometers on the substrate surface, thus providing waterproofing and corrosion protection. Existing aircraft corrosion inhibitor patents CN201710687081.0, CN201610975664.9, and CN201710058007.2 focus on properties such as flash point, penetrability, water displacement, and curing speed, respectively. Like existing foreign products, they only meet the basic performance requirements within the current general specifications for corrosion inhibitors.

[0004] However, aircraft face frequent low-temperature vibrations during operation. Temperatures at high altitudes can drop to -30°C to -40°C. Existing corrosion inhibitors, when subjected to external forces at these temperatures, will develop surface cracks, allowing condensed water to seep in and negate their protective effect. Furthermore, aircraft frequently operate in harsh environments such as high altitudes and polar regions. For example, winter ground temperatures at Arxan Airport in Inner Mongolia can reach -30°C, and at Edmonton International Airport in Canada, they can drop below -40°C. This presents corrosion inhibitors with even more severe low-temperature challenges. Low-temperature cracking is more pronounced in open areas such as landing gear and cargo doors, which are exposed to even lower temperatures and more severe corrosive environments. For instance, during winter landings, the landing gear experiences significant vibrations in low-temperature conditions, making it more prone to cracking and even peeling. Additionally, de-icing salt from the ground can enter the landing gear bays during landing, causing severe corrosion.

[0005] Therefore, how to further improve the flexibility and low-temperature resistance of corrosion inhibitors while meeting the general performance requirements of corrosion inhibitors, thereby greatly improving the operational safety of aircraft in complex and extreme environments, is a problem that needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems existing in the prior art and to provide a preservative composition, its preparation method, and its application.

[0007] To achieve the above objectives, the present invention provides a preservative composition comprising a film-forming resin component and a lubricant, wherein the film-forming resin component comprises a hard resin and a soft resin, the hard resin having a softening point above 90°C, the soft resin having a glass transition temperature below 25°C, and the weight ratio of the hard resin to the soft resin being 1-15:1, and the lubricant content being 30-400 parts by weight relative to 1000 parts by weight of the film-forming resin component.

[0008] A second aspect of the present invention provides a method for preparing the above-described preservative composition, the method comprising using the above-described film-forming resin component and lubricant when preparing the preservative composition.

[0009] A third aspect of the present invention provides a preservative comprising the above-described preservative composition.

[0010] The fourth aspect of the present invention provides an application of the above-mentioned corrosion inhibitor in the corrosion protection of aircraft metal materials.

[0011] The corrosion inhibitor composition of this invention employs a film-forming resin component composed of specific soft and hard resins, combined with a specific amount of lubricant, to form a multi-layered composite coating structure with soft resin linking hard resin as the core and lubricant filling the gaps. This structure exhibits excellent film-forming properties and adhesion, and particularly superior flexibility and low-temperature resistance. It effectively solves the problem of existing corrosion inhibitors cracking at low temperatures, leading to moisture penetration and corrosion of the coating, thus greatly improving aircraft operational safety. Detailed Implementation

[0012] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0013] The present invention provides a preservative composition comprising a film-forming resin component and a lubricant, wherein the film-forming resin component comprises a hard resin and a soft resin, the hard resin having a softening point above 90°C and the soft resin having a glass transition temperature below 25°C, and the weight ratio of the hard resin to the soft resin being 1-15:1, and the lubricant content being 30-400 parts by weight relative to 1000 parts by weight of the film-forming resin component.

[0014] According to the present invention, the film-forming resin component can form a dense, transparent film that isolates the aircraft surface from the external environment, thereby achieving waterproofing and corrosion resistance. In particular, the film-forming resin component formed by the compounding of hard and soft resins in this invention, combined with a specific amount of lubricant, can form a multi-layered composite coating structure with a stable internal structure, exhibiting excellent low-temperature resistance. In this compound component, the hard and soft resin molecules are uniformly distributed and cross-linked, while an appropriate amount of lubricant is distributed within the formed network structure, making the coating film more stable at low temperatures and possessing both mechanical strength and wear resistance, as well as elasticity and flexibility.

[0015] According to the present invention, in order to facilitate better bonding between the hard resin molecules and the soft resin molecules, and to ensure that the preservative composition possesses good mechanical strength, flexibility, and low-temperature resistance after film formation, it is necessary to control the softening point of the hard resin, the glass transition temperature of the soft resin, and the weight ratio between the hard and soft resins. Preferably, the softening point of the hard resin is 90-110°C, for example, 90°C, 93°C, 100°C, and 105°C, or any value thereof. The glass transition temperature of the soft resin is 0-25°C, for example, 0°C, 8°C, 14°C, and 23°C, or any value thereof. Preferably, the weight ratio of the hard resin to the soft resin is 1-8:1, for example, 1:1, 4:1, 5:1, and 7:1, or any value thereof.

[0016] According to the present invention, in order to improve the performance of the preservative composition, the weight-average molecular weight and hydroxyl value of the hard resin and the soft resin can be controlled. A preferred weight-average molecular weight will result in a more appropriate resin viscosity, facilitate resin processing and dissolution, ensure uniform distribution of other additives, and achieve better weather resistance. Furthermore, optimizing the weight-average molecular weight of the hard and soft resins also aims to increase their affinity, enabling them to bind better and faster. The hydroxyl value affects the polarity of the resin; optimizing the hydroxyl value not only enhances the affinity between the hard and soft resins, facilitating their binding, but also helps to adjust the polarity of the film-forming resin component to be close to that of the metal surface. This ensures that the preservative composition, after film formation, has a high affinity with the metal surface, thereby better adhering to the metal substrate.

[0017] Preferably, the weight-average molecular weight of the hard resin is 300-3000 g / mol, more preferably 800-2000 g / mol, such as 900 g / mol, 1200 g / mol, 1700 g / mol, and 1900 g / mol, or any value between these values. Preferably, the hydroxyl value of the hard resin is below 10 KOH mg / g, more preferably 0-5 KOH mg / g, such as 1 KOH mg / g, 2.5 KOH mg / g, 3.7 KOH mg / g, and 4.5 KOH mg / g, or any value between these values. Preferably, the weight-average molecular weight of the soft resin is 2000-6000 g / mol, more preferably 2000-4000 g / mol, such as 2300 g / mol, 2900 g / mol, 3600 g / mol, and 4000 g / mol, or any value between these values. Preferably, the hydroxyl value of the soft resin is above 80 KOH mg / g, preferably 90-120 KOH mg / g, for example, 90 KOH mg / g, 100 KOH mg / g, 105 KOH mg / g and 120 KOH mg / g and any range between these values.

[0018] According to the present invention, the hard resin can be selected from a variety of resins used to form hard films, as long as it can be combined with the soft resin and lubricant of the present invention to obtain good flexibility and low-temperature resistance. To facilitate the formation of the film-forming resin component, preferably, the hard resin is selected from one or more of the following: C5 petroleum resin (especially C5 petroleum resin with a softening point of 90-95°C and a weight-average molecular weight of 1500-1800 g / mol), C9 petroleum resin (especially C9 petroleum resin with a softening point of 90-100°C and a weight-average molecular weight of 1100-1400 g / mol), C5 / C9 copolymer petroleum resin (especially C5 / C9 petroleum resin with a softening point of 95-100°C and a weight-average molecular weight of 1600-1900 g / mol), nitro resin (especially nitro resin with a softening point of 95-100°C and a weight-average molecular weight of 1800-2000 g / mol), and polyacrylic acid resin (especially polyacrylic acid resin with a softening point of 100-110°C and a weight-average molecular weight of 1600-1800 g / mol). Preferably, the soft resin is selected from one or more of the following: polyacrylic acid resin (especially polyacrylic acid resin with a glass transition temperature of 5-15°C and a weight-average molecular weight of 3200-3800 g / mol), alkyd resin (especially alkyd resin with a glass transition temperature of 0-15°C and a weight-average molecular weight of 3600-4000 g / mol), polyester resin (especially polyester resin with a glass transition temperature of 15-25°C and a weight-average molecular weight of 3500-3800 g / mol), and polyurethane resin (especially polyurethane resin with a glass transition temperature of 20-25°C and a weight-average molecular weight of 3800-4000 g / mol).

[0019] According to the present invention, as described above, by using a specific amount of lubricant in combination with a film-forming resin component of a specific composition, a corrosion inhibitor composition with good mechanical strength, flexibility, and low-temperature resistance can be obtained, which is particularly beneficial for corrosion protection of aircraft at low temperatures. To better integrate with the film-forming resin component and further enhance the flexibility and low-temperature resistance of the corrosion inhibitor composition, preferably, the lubricant content is 40-300 parts by weight relative to 1000 parts by weight of the film-forming resin component, more preferably 45-200 parts by weight, for example, 45 parts by weight, 70 parts by weight, 125 parts by weight, and 190 parts by weight, and any range thereof. The lubricant can be selected from a variety of lubricants, as long as it can fill the film-forming resin component to facilitate the formation of a multi-layered composite coating structure. To further improve the flexibility of the preservative composition and ensure its excellent low-temperature resistance, the lubricant is preferably selected from one or more of paraffin wax, liquid paraffin wax, polyethylene wax, polypropylene wax, oxidized polyethylene wax, polyethylene glycol wax, polyurethane wax, and beeswax, and more preferably from one or more of paraffin wax, liquid paraffin wax, polyethylene wax, and polypropylene wax.

[0020] According to the present invention, the preservative composition may also include a solvent in general. In the present invention, the solvent preferably includes a main solvent and a co-solvent. To better dissolve the various components and to facilitate faster film formation of the preservative composition, the weight ratio of the main solvent to the co-solvent is preferably 1-20:1, more preferably 1-10:1, for example, values ​​such as 2:1, 4:1, 6:1, and 9:1, and any range thereof. Preferably, the solvent content is 400-2000 parts by weight relative to 1000 parts by weight of the film-forming resin component, more preferably 700-1000 parts by weight, for example, values ​​such as 700 parts by weight, 780 parts by weight, 860 parts by weight, and 970 parts by weight, and any range thereof.

[0021] According to the present invention, the main solvent and co-solvent can be selected from a variety of solvents commonly used in the art, as long as they can have good solubility for the various components of the present invention. Specifically, to improve the safety of the preservative composition, a solvent meeting certain flash point requirements can be selected. Preferably, the flash point of the main solvent is above 35°C, preferably 40-100°C, for example, values ​​such as 40°C, 55°C, 76°C, and 100°C, or any range between these values. To improve the stability of the preservative composition and enhance its long-term storage performance, preferably, the main solvent is selected from one or more of dearomatic solvent oils and isoparaffinic solvent oils, and the co-solvent is selected from one or more of alcohol ether solvents.

[0022] More preferably, the main solvent is selected from one or more of D40, D60, D100 and isoparaffinic solvent oils, and the co-solvent is selected from one or more of ethylene glycol butyl ether, propylene glycol butyl ether, propylene glycol methyl ether, dipropylene glycol butyl ether and propylene glycol methyl ether acetate.

[0023] According to the present invention, in order to improve the overall performance of the preservative composition, preferably, the preservative composition may further include an auxiliary agent, such as one or more of an adhesion promoter, corrosion inhibitor, leveling agent, defoamer, and dye.

[0024] In a preferred embodiment of the present invention, in the preservative composition, relative to 1000 parts by weight of the film-forming resin component, the content of the adhesion promoter is 20-200 parts by weight, the content of the corrosion inhibitor is 100-300 parts by weight, the content of the leveling agent is 20-100 parts by weight, the content of the defoamer is 20-100 parts by weight, and the content of the dye is 1-20 parts by weight.

[0025] More preferably, relative to 1000 parts by weight of the film-forming resin component, the content of the adhesion promoter is 20-120 parts by weight, for example, 22 parts by weight, 37 parts by weight, 65 parts by weight, and 110 parts by weight, or any of these values; the content of the corrosion inhibitor is 100-150 parts by weight, for example, 105 parts by weight, 116 parts by weight, 127 parts by weight, and 144 parts by weight, or any of these values; the content of the leveling agent is 20-50 parts by weight, for example, 20 parts by weight, 28 parts by weight, 39 parts by weight, and 46 parts by weight, or any of these values; the content of the defoamer is 20-50 parts by weight, for example, 22 parts by weight, 31 parts by weight, 45 parts by weight, and 50 parts by weight, or any of these values; and the content of the dye is 1-10 parts by weight, for example, 1 part by weight, 3 parts by weight, 6 parts by weight, and 9 parts by weight, or any of these values.

[0026] According to the present invention, the adhesion promoter can be selected from a variety of adhesion promoters commonly used in the art, as long as it can enhance the adhesion of the preservative composition to the substrate. Water repellency is achieved when the bonding force between the preservative composition and the substrate is greater than the bonding force between water and the substrate. To improve the bonding force between the preservative composition and the substrate, enhance the permeability of the wet film, and ensure better adhesion to the substrate after film drying, preferably, the adhesion promoter is selected from one or more of MOA-3, Span-80, Span-60, TX-4, and octadecylamine polyoxyethylene ether, and more preferably from one or more of MOA-3, Span-80, and TX-4.

[0027] According to the present invention, the corrosion inhibitor can be selected from a variety of corrosion inhibitors used in the art for inhibiting corrosion, as long as it can inhibit existing corrosion and provide a second layer of protection when the coating is damaged. To further improve the corrosion resistance of the corrosion inhibitor composition, preferably, the corrosion inhibitor is selected from one or more of barium petroleum sulfonate, sodium petroleum sulfonate, calcium petroleum sulfonate, and benzotriazole, and more preferably from one or more of barium petroleum sulfonate and calcium petroleum sulfonate.

[0028] According to the present invention, the leveling agent can be selected from a variety of leveling agents commonly used in the art, as long as it can make the coating of the preservative composition smooth and even after film formation. To avoid defects such as pinholes during film formation of the preservative composition, ensure coating quality, and ensure that the leveling agent maintains good solubility in the co-solvent and performs its function after the preservative composition has been used and the main solvent has largely evaporated, preferably, the leveling agent is selected from one or more polyacrylic acid leveling agents.

[0029] According to the present invention, the defoamer can be selected from a variety of defoamers used in the art for eliminating bubbles, as long as they can reduce the impact of bubbles on film formation. To facilitate the function of the defoamer and improve the film-forming state of the preservative composition, the defoamer should have good solubility in the solution system of this product. Preferably, the defoamer is selected from one or more non-organosilicon defoamers.

[0030] According to the present invention, the dye can be selected from conventional dyes in the art, as long as it can impart color to make the coating of the preservative composition more easily identifiable after film formation. To facilitate the dyeing effect by improving the solubility of the dye in the solution system and to avoid affecting the transparency of the coating after film formation, preferably, the dye is selected from oil-soluble dark brownish-yellow dyes, wherein the oil-soluble dark brownish-yellow dye is a blend of oil-soluble red, brown, and yellow dyes.

[0031] A second aspect of the present invention provides a method for preparing the above-described preservative composition, the method comprising using the above-described film-forming resin component and lubricant when preparing the preservative composition.

[0032] According to the present invention, in order to obtain the preservative composition of higher quality, preferably, the method includes dissolving the film-forming resin component and lubricant in a solvent at a heating temperature, adding optional additives, maintaining stirring and cooling (e.g., to 20-35°C) and then continuing to stir to obtain the preservative composition.

[0033] According to the present invention, preferably, the heating temperature is 60-120℃, more preferably 70-100℃, for example, 75℃, 88℃, 92℃, and 100℃, or any value between these values. Preferably, the stirring time after cooling is 2-8 hours, more preferably 2-4 hours, for example, 2.2 hours, 2.8 hours, 3.5 hours, and 3.9 hours, or any value between these values.

[0034] A third aspect of the present invention provides a preservative comprising the above-described preservative composition.

[0035] The fourth aspect of the present invention provides an application of the above-mentioned corrosion inhibitor in the corrosion protection of aircraft metal materials.

[0036] The preservative composition of the present invention, through the combination of specific hard resin, soft resin and lubricant, especially with the addition of other auxiliary components, further improves the flexibility and low temperature resistance while meeting the performance requirements of existing preservatives. It can maintain the integrity of the paint film after deformation in a low temperature environment of -40°C without cracking or peeling.

[0037] The present invention will be described in detail below through embodiments.

[0038] In the following examples, we selected different grades of resins from several domestic and international resin manufacturers, such as Seven Pound Resin, Lanzhou Petrochemical, Better Chemical, Changxing Resin, Covestro, and Zhanxin Resin, and tested the key parameters of the resins to select resins with suitable performance.

[0039] Hard resin:

[0040] C5 petroleum resin A 90 1800 0 C5 petroleum resin B 118 1500 1 C5 petroleum resin C 92 2900 8 C5 petroleum resin D 82 1500 2 C9 petroleum resin 95 1300 0 C5 / C9 copolymer petroleum resin 98 1800 0 Nitro resin 96 2000 5

[0041] Soft resin:

[0042]

[0043]

[0044] Note: All other conventional materials can be purchased on the market and will not be discussed further here.

[0045] Examples 1-13

[0046] The raw materials and dosages for Examples 1-13 are shown in Table 1. The preparation process of the preservative composition includes:

[0047] Add the main solvent and co-solvent to the reactor, stir and heat to 90°C, then add the hard resin. After the hard resin is completely dissolved, add the soft resin. After the soft resin is also completely dissolved, add the lubricant until it is completely dissolved.

[0048] Continue to add one or more of the following to the reaction vessel: adhesion promoter, corrosion inhibitor, leveling agent, defoamer, and dye. After mixing evenly, stir and cool to room temperature. Then continue stirring at room temperature for 4 hours before discharging to obtain the preservative composition.

[0049] Comparative Examples 1-7

[0050] The raw materials and amounts used in Comparative Examples 1-7 are shown in Table 1. The preparation process of the preservative compositions is the same as that in Examples 1-13, except that some materials were not used in some examples.

[0051] Table 1

[0052]

[0053]

[0054]

[0055] Test case

[0056] The corrosion inhibitor composition was tested according to the test methods and requirements for aircraft maintenance materials, and the test methods were refined and optimized with reference to the requirements of "Technical Specifications for Aircraft Corrosion Inhibitors (Draft for Comments)", "GB / T 1731-2020 Test Method for Flexibility of Paint Film and Putty Film", and "GB / T9286-2021 Cross-cut Test for Paints and Varnishes". The specific methods are as follows:

[0057] 1. Preparation of preservative samples:

[0058] A. All metal samples used for testing were 2024-T3 (AMS-QQ-Q-250 / 4) bare aluminum alloy, and their dimensions met the experimental requirements;

[0059] B. Select a wide-mouthed container that matches the size of the metal sample, allowing the sample to be vertically immersed in it.

[0060] C. Before applying the preservative, roll the sealed container containing the preservative sample in one direction for at least 5 minutes to mix it thoroughly, while avoiding the formation of air bubbles.

[0061] D. Pour the required volume of preservative into the container. Pour slowly to avoid entraining air and creating bubbles.

[0062] E. Immerse the metal sample vertically in the corrosion inhibitor for at least 1 minute to ensure the corrosion inhibitor adheres to the sample surface. Then, slowly and vertically remove the sample at a speed not exceeding 30 cm / min. Hang the corrosion-inhibited metal sample vertically in a smoke-free and dust-free environment to dry at room temperature for 24 hours.

[0063] 2. Low-temperature adhesion

[0064] A. Prepare one test plate for each batch of experiments, with dimensions of 10×14×0.1cm.

[0065] B. Cool the test panel coated with the preservative to -30±2℃ and maintain this temperature for at least 1 hour. At -30±2℃, make four parallel scratches on the preservative coating. Then, make four more parallel scratches perpendicular to the previous scratches, with a spacing of 0.3 mm and a length of 2.5 cm. If the preservative coating peels off within the scratched area, the adhesion is considered unsatisfactory. If peeling exceeds 1.3 mm on any side of the scratches, the coating is considered peeled off.

[0066] C. Further test the adhesion performance of the coating at -40±2℃ using the method described in the previous step.

[0067] 3. Low temperature deflection

[0068] A. Prepare three test plates for each batch of experiments, with dimensions of 5×14×0.05cm.

[0069] B. Keep the test panel coated with preservative at -40±2℃ for at least 1 hour. At this temperature, quickly bend the test panel 60-90° on a circular shaft with a radius of 12.7mm. The time from opening the refrigerator door to the completion of bending should not exceed 5 seconds. Observe the preservative coating on the test panel and check for cracks or peeling exceeding 1.3mm.

[0070] The experimental results are shown in Table 2:

[0071] Table 2

[0072]

[0073]

[0074] As shown in Table 2, the low-temperature resistance of Comparative Examples 1-7, which did not adopt the technical solution of the present invention, was inferior to that of Examples 1-13 of the present invention. Examples 1-13 of the present invention achieved good technical effects, especially Examples 1-5, which could remain completely crack-free and non-peeling at low temperatures of -30℃ to -40℃, greatly improving the flight safety of aircraft in extreme low-temperature environments.

[0075] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A preservative composition, characterized in that, The composition contains a film-forming resin component and a lubricant, wherein the film-forming resin component comprises a hard resin and a soft resin, the hard resin has a softening point of 90-110°C, the soft resin has a glass transition temperature of 0-20°C, and the weight ratio of the hard resin to the soft resin is 1-15:1, and the lubricant content is 30-400 parts by weight relative to 1000 parts by weight of the film-forming resin component. The hard resin is selected from one or more of C5 petroleum resin, C9 petroleum resin, C5 / C9 copolymer petroleum resin, nitro resin and polyacrylic resin, and the soft resin is selected from one or more of polyacrylic resin, alkyd resin, polyester resin and polyurethane resin; The hard resin has a weight-average molecular weight of 800-2000 g / mol and a hydroxyl value of 0-5 KOH mg / g; the soft resin has a weight-average molecular weight of 2000-4000 g / mol and a hydroxyl value of 90-120 KOH mg / g.

2. The composition according to claim 1, wherein, The weight ratio of the hard resin to the soft resin is 1-8:

1.

3. The composition according to claim 1, wherein, The lubricant content is 40-300 parts by weight relative to 1000 parts by weight of the film-forming resin component.

4. The composition according to claim 3, wherein, The lubricant content is 45-200 parts by weight relative to 1000 parts by weight of the film-forming resin component.

5. The composition according to claim 1, wherein, The lubricant is selected from one or more of paraffin wax, liquid paraffin wax, polyethylene wax, polypropylene wax, oxidized polyethylene wax, polyethylene glycol wax, polyurethane wax, and beeswax.

6. The composition according to claim 5, wherein, The lubricant is selected from one or more of paraffin wax, liquid paraffin wax, polyethylene wax, and polypropylene wax.

7. The composition according to claim 1, wherein, The composition further includes a solvent, which includes a main solvent and a co-solvent.

8. The composition according to claim 7, wherein, The flash point of the main solvent is above 35°C.

9. The composition according to claim 8, wherein, The flash point of the main solvent is 40-100℃.

10. The composition according to claim 7, wherein, The weight ratio of the main solvent to the co-solvent is 1-20:

1.

11. The composition according to claim 10, wherein, The weight ratio of the main solvent to the co-solvent is 1-10:

1.

12. The composition according to claim 7, wherein, The solvent content is 400-2000 parts by weight relative to 1000 parts by weight of the film-forming resin component.

13. The composition according to claim 12, wherein, The solvent content is 700-1000 parts by weight relative to 1000 parts by weight of the film-forming resin component.

14. The composition according to claim 7, wherein, The main solvent is selected from one or more of dearomatic solvent oil and isoparaffin solvent oil, and the co-solvent is selected from one or more of alcohol ether solvents.

15. The composition according to claim 14, wherein, The primary solvent is selected from one or more of D40, D60, D100 and isoparaffinic solvent oils, and the co-solvent is selected from one or more of ethylene glycol butyl ether, propylene glycol butyl ether, propylene glycol methyl ether, dipropylene glycol butyl ether and propylene glycol methyl ether acetate.

16. The composition according to claim 1, wherein, The composition further includes additives, which include one or more of adhesion promoters, corrosion inhibitors, leveling agents, defoamers, and dyes.

17. The composition according to claim 16, wherein, Relative to 1000 parts by weight of the film-forming resin component, the content of the adhesion promoter is 20-200 parts by weight, the content of the corrosion inhibitor is 100-300 parts by weight, the content of the leveling agent is 20-100 parts by weight, the content of the defoamer is 20-100 parts by weight, and the content of the dye is 1-20 parts by weight.

18. The composition according to claim 17, wherein, Relative to 1000 parts by weight of the film-forming resin component, the content of the adhesion promoter is 20-120 parts by weight, the content of the corrosion inhibitor is 100-150 parts by weight, the content of the leveling agent is 20-50 parts by weight, the content of the defoamer is 20-50 parts by weight, and the content of the dye is 1-10 parts by weight.

19. A method for preparing the preservative composition according to any one of claims 1-18, characterized in that, The method includes using the film-forming resin component and lubricant in the preparation of the preservative composition.

20. A preservative containing the preservative composition of any one of claims 1-18.

21. The application of the corrosion inhibitor of claim 20 in the corrosion protection of aircraft metal materials.

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