High-strength corrosion-resistant aluminum alloy material for aerosol can and preparation method of high-strength corrosion-resistant aluminum alloy material

Abstract

The invention discloses a high-strength corrosion-resistant aluminum alloy material for an aerosol can and a preparation method of the high-strength corrosion-resistant aluminum alloy material, and relates to the technical field of aerosol can materials. 1.2 wt% to 1.5 wt% of N ; the content of Mo is 0.02 to 0.03 percent by weight; 1.2 wt% to 1.6 wt% of S ; 0.6 wt% to 1.2 wt% of Mg; 1.2 wt% to 1.8 wt% of Cu; 0.05 wt% to 0.08 wt% of T ; 0.10 wt% to 0.15 wt% of Cr; re; and the balance of A l; according to the aluminum alloy material, all the components of the aluminum alloy material are greatly adjusted, and a more suitable component dosage ratio is adopted, so that the prepared aluminum alloy material not only has higher strength performance, but also has excellent corrosion resistance, and can be better suitable for being used in aerosol cans.

Description

Technical Field

[0001] The invention belongs to the technical field of aerosol can materials, in particular to a high-strength corrosion-resistant aluminum alloy material for an aerosol can and a preparation method thereof. Background Art

[0002] With the continuous development of spray products, aerosol packaging has gradually begun to rise, and aerosol cans are the storage containers for aerosols. Since the use of aerosols in construction, food, medicine, and home fields is very large, aerosol cans are also in great demand.

[0003] Aerosol cans are airtight packaging containers with injection valves and spray propulsion. Therefore, the aerosol can body needs to be able to withstand a certain internal pressure. Initially, the metal container material used to hold aerosols was tinplate, but tinplate has relatively poor corrosion resistance and is heavy, which limits its large-scale application.

[0004] Aluminum alloy materials have been widely favored by the metal packaging industry for their excellent characteristics such as high quality, light weight and pressure resistance. They are widely used in industrial and household products, packaged beverages, personal care products such as hair spray, cosmetics, pharmaceuticals and other consumer products.

[0005] In order to expand its application field, the performance of aluminum alloy materials is further improved, and the corrosion resistance of aluminum alloy materials is greatly improved, thereby broadening its application in the corrosion field.

[0006] Based on this, a high-strength, corrosion-resistant aluminum alloy material for an aerosol can and a preparation method thereof are provided to solve the existing technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a high-strength corrosion-resistant aluminum alloy material for an aerosol can and a preparation method thereof, so as to solve the deficiencies in the prior art.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0010] 0.6wt%-0.8wt% Mn; 1.2wt%-1.5wt% Ni; 0.02-0.03wt% Mo; 1.2wt%-1.6wt% Si; 0.6wt%-1.2wt% Mg; 1.2wt%-1.8wt% Cu; 0.05wt%-0.08wt% Ti; 0.10wt%-0.15wt% Cr; Re; and the balance Al;

[0011] Among them, the Re and Ti mass fraction values ​​satisfy the following formula:

[0012] x+2y=0.1;

[0013] x = Ti mass fraction value;

[0014] y = Re mass fraction value.

[0015] As a further technical solution, the grain size of the aluminum alloy material in the T6 state is 55-60 μm.

[0016] As a further technical solution, the Re is a mixture of Ce and La;

[0017] The mixing mass ratio of Ce to La is 2:1.

[0018] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0019] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 620-630°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained;

[0020] S2, adding AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjusting the temperature to 640-660° C., keeping warm, and stirring for 10-12 minutes to obtain a second molten liquid;

[0021] S3, adding Al-Re master alloy and Al-Ti master alloy to the second molten liquid, then adjusting the temperature to 710-730° C., stirring and mixing for 15 minutes, and then refining, blowing and slagging to obtain a third molten liquid;

[0022] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0023] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0024] As a further technical solution, the heating rate in S1 is 10°C / s.

[0025] As a further technical solution, in S2, the heating rate is 15°C / s and the stirring speed is 100r / min.

[0026] As a further technical solution, the heating rate in S3 is 10°C / s and the stirring speed is 120r / min.

[0027] As a further technical solution, it is refined as follows:

[0028] adding a refining agent to the second molten liquid;

[0029] The refining agent composition is:

[0030] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0031] The amount of the refining agent added is 0.013-0.015% of the mass of the second molten liquid.

[0032] As a further technical solution: slag purging is to use pure nitrogen to purge from the bottom of the melt for 18 minutes, and then slag is purged after the purging is completed.

[0033] Beneficial effects:

[0034] The present invention makes substantial adjustments to the components of the aluminum alloy material and adopts a more suitable component dosage ratio, so that the manufactured aluminum alloy material not only has higher strength performance, but also has excellent corrosion resistance and can be better suitable for use in aerosol cans.

[0035] In order to further improve the coordination effect of each component, the present invention has undergone a large number of experimental studies and found that when the mass fractions of Ti and Re in the aluminum alloy material satisfy the formula x+2y=0.1, the crystallization core and supercooling of the liquid metal can be increased, and an adsorption film is generated on the surface of the precipitation phase or the growth phase to hinder the continued growth of the grains, refine the grains, and improve the high-temperature strength, structural stability and corrosion resistance of the aluminum alloy material, thereby further broadening the range of aerosols stored in the aerosol can made of the aluminum alloy material of the present invention, and being able to continuously and stably store corrosive aerosols; by using Ce and La with a mass ratio of 2:1, their coordination can play a better role in promoting the refinement of grains in the aluminum alloy material, and has a more obvious promoting effect on corrosion resistance compared to the use of other rare earth elements.

[0036] In order to improve the comprehensive performance of the aluminum alloy material prepared by the present invention, the present invention carries out a refining treatment during the preparation of the aluminum alloy material, mainly by introducing a refining agent, which can achieve a good impurity removal effect, and has a strong degassing ability. The fine oxide inclusions can be purged and removed by pure nitrogen, which shows an excellent impurity removal effect. The efficient and clean impurity removal treatment can greatly improve the microstructure of the aluminum alloy, laying a solid foundation for the comprehensive performance of the aluminum alloy material.

[0037] The present invention can not only improve the strength performance of aluminum alloy materials by introducing nickel elements, but also improve their processing performance during the processing of aluminum alloy materials. This is because aluminum alloy materials have high plasticity and low toughness and are prone to cracking and deformation. After the introduction of nickel elements, they can be more easily formed, greatly reducing deformation and damage during the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a flow chart for preparing a high-strength, corrosion-resistant aluminum alloy material for aerosol cans. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0042] 0.6wt% Mn; 1.2wt% Ni; 0.02wt% Mo; 1.2wt% Si; 0.6wt% Mg; 1.2wt% Cu; 0.05wt% Ti; 0.10wt% Cr; 0.025wt% Re; and the balance Al;

[0043] The grain size of aluminum alloy material in T6 state is 55μm.

[0044] Re is a mixture of Ce and La;

[0045] The mixing mass ratio of Ce to La is 2:1.

[0046] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0047] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 620°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained; the heating rate is 10°C / s.

[0048] S2. Add AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjust the temperature to 640°C, keep warm, and stir for 10 minutes to obtain a second molten liquid; the heating rate is 15°C / s, and the stirring speed is 100r / min.

[0049] S3. Add Al-Re master alloy and Al-T i master alloy to the second molten liquid, then adjust the temperature to 710°C, stir and mix for 15 minutes, and then refine and blow off the slag to obtain a third molten liquid; the heating rate is 10°C / s, and the stirring speed is 120r / min.

[0050] Refined to:

[0051] adding a refining agent to the second molten liquid;

[0052] The refining agent composition is:

[0053] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0054] The amount of the refining agent added was 0.013% of the mass of the second molten liquid.

[0055] The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

[0056] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0057] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0058] Example 2

[0059] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0060] 0.7wt% Mn; 1.3wt% Ni; 0.025wt% Mo; 0.1.4wt% Si; 0.8wt% Mg; 1.3wt% Cu; 0.06wt% Ti; 0.12wt% Cr; 0.02wt% Re; and the balance Al;

[0061] The grain size of aluminum alloy material in T6 state is 58μm.

[0062] Re is a mixture of Ce and La;

[0063] The mixing mass ratio of Ce to La is 2:1.

[0064] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0065] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 625°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained; the heating rate is 10°C / s.

[0066] S2. Add AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjust the temperature to 645°C, keep warm, and stir for 11 minutes to obtain a second molten liquid; the heating rate is 15°C / s, and the stirring speed is 100r / min.

[0067] S3. Add Al-Re master alloy and Al-T i master alloy to the second molten liquid, then adjust the temperature to 712°C, stir and mix for 15 minutes, and then refine and blow off the slag to obtain a third molten liquid; the heating rate is 10°C / s, and the stirring speed is 120r / min.

[0068] Refined to:

[0069] adding a refining agent to the second molten liquid;

[0070] The refining agent composition is:

[0071] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0072] The amount of the refining agent added was 0.014% of the mass of the second molten liquid.

[0073] The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

[0074] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0075] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0076] Example 3

[0077] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0078] 0.7wt% Mn; 1.4wt% Ni; 0.025wt% Mo; 0.1.5wt% Si; 0.9wt% Mg; 1.4wt% Cu; 0.07wt% Ti; 0.13wt% Cr; 0.015wt% Re; and the balance Al;

[0079] The grain size of aluminum alloy material in T6 state is 55μm.

[0080] Re is a mixture of Ce and La;

[0081] The mixing mass ratio of Ce to La is 2:1.

[0082] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0083] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 625°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained; the heating rate is 10°C / s.

[0084] S2. Add AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjust the temperature to 645°C, keep warm, and stir for 10-12 minutes to obtain a second molten liquid; the heating rate is 15°C / s, and the stirring speed is 100r / min.

[0085] S3. Add Al-Re master alloy and Al-T i master alloy to the second molten liquid, then adjust the temperature to 718°C, stir and mix for 15 minutes, and then refine and blow off the slag to obtain a third molten liquid; the heating rate is 10°C / s, and the stirring speed is 120r / min.

[0086] Refined to:

[0087] adding a refining agent to the second molten liquid;

[0088] The refining agent composition is:

[0089] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0090] The amount of the refining agent added was 0.014% of the mass of the second molten liquid.

[0091] The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

[0092] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0093] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0094] Example 4

[0095] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0096] 0.8wt% Mn; 1.5wt% Ni; 0.02wt% Mo; 1.6wt% Si; 0.6wt% Mg; 1.5wt% Cu; 0.07wt% Ti; 0.10wt% Cr; 0.015wt% Re; and the balance Al;

[0097] The grain size of aluminum alloy material in T6 state is 58μm.

[0098] Re is a mixture of Ce and La;

[0099] The mixing mass ratio of Ce to La is 2:1.

[0100] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0101] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 628°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained; the heating rate is 10°C / s.

[0102] S2. Add AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjust the temperature to 650°C, keep warm, and stir for 11 minutes to obtain a second molten liquid; the heating rate is 15°C / s, and the stirring speed is 100r / min.

[0103] S3. Add Al-Re master alloy and Al-T i master alloy to the second molten liquid, then adjust the temperature to 720° C., stir and mix for 15 minutes, and then refine and blow off the slag to obtain a third molten liquid; the heating rate is 10° C. / s, and the stirring speed is 120 r / min.

[0104] Refined to:

[0105] adding a refining agent to the second molten liquid;

[0106] The refining agent composition is:

[0107] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0108] The amount of the refining agent added was 0.014% of the mass of the second molten liquid.

[0109] The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

[0110] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0111] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0112] Example 5

[0113] A high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following components:

[0114] 0.8wt% Mn; 1.5wt% Ni; 0.03wt% Mo; 1.6wt% Si; 1.2wt% Mg; 1.8wt% Cu; 0.08wt% Ti; 0.15wt% Cr; 0.02wt% Re; and the balance Al;

[0115] The grain size of aluminum alloy material in T6 state is 60μm.

[0116] Re is a mixture of Ce and La;

[0117] The mixing mass ratio of Ce to La is 2:1.

[0118] A method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can comprises the following steps:

[0119] S1. According to the designed composition, aluminum ingots, magnesium ingots, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, and Al-Cr master alloy are added to the melting furnace in sequence, heated to 630°C, and kept warm. After all the raw materials are melted, the first molten liquid is obtained; the heating rate is 10°C / s.

[0120] S2. Add AlNi master alloy and Al-Mo master alloy to the first molten liquid, then adjust the temperature to 660°C, keep warm, and stir for 10-12 minutes to obtain a second molten liquid; the heating rate is 15°C / s, and the stirring speed is 100r / min.

[0121] S3. Add Al-Re master alloy and Al-T i master alloy to the second molten liquid, then adjust the temperature to 730° C., stir and mix for 15 minutes, and then refine and blow off the slag to obtain a third molten liquid; the heating rate is 10° C. / s, and the stirring speed is 120 r / min.

[0122] Refined to:

[0123] adding a refining agent to the second molten liquid;

[0124] The refining agent composition is:

[0125] Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3;

[0126] The amount of the refining agent added is 0.015% of the mass of the second molten liquid.

[0127] The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

[0128] S4, injecting the third molten liquid into a mold for casting and heat treatment to obtain an aluminum alloy strip;

[0129] Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

[0130] Comparative Example 1:

[0131] Based on Example 1, Re is not added and the rest of the technical solutions remain unchanged.

[0132] Comparative Example 2:

[0133] Based on Example 1, Ti is not added and the rest of the technical solutions remain unchanged.

[0134] Comparative Example 3:

[0135] Based on Example 1, calcium fluoride is not added to the refining agent, and the rest of the technical solutions remain unchanged.

[0136] test:

[0137] Mechanical properties testing standard: GB / T228 room temperature tensile test method for metal materials, test the example and comparative example samples, and compare:

[0138] Table 1

[0139] Tensile strength MPa Example 1 624 Example 2 631 Example 3 645 Example 4 641 Example 5 633 Comparative Example 1 403 Comparative Example 2 492 Comparative Example 3 579

[0140] It can be seen from Table 1 that the aluminum alloy material for aerosol cans prepared in the present invention has higher strength performance.

[0141] The examples and comparative samples were tested according to the GB / T22640-2023 aluminum alloy stress corrosion sensitivity evaluation test method:

[0142] Table 2

[0143] Stress corrosion sensitivity factor % Intergranular corrosion depth μm Example 1 3.2 65 Example 2 3.6 69 Example 3 3.1 62 Example 4 3.4 67 Example 5 3.5 65 Comparative Example 1 12.6 123 Comparative Example 2 6.5 91 Comparative Example 3 3.8 75

[0144] It can be seen from Table 2 that the aluminum alloy material prepared in the present invention has excellent corrosion resistance.

[0145] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A high-strength, corrosion-resistant aluminum alloy material for an aerosol can, characterized in that: Includes the following ingredients: 0.6wt%-0.8wt% Mn; 1.2wt%-1.5wt% Ni; 0.02-0.03wt% Mo; 1.2wt%-1.6wt% Si; 0.6wt%-1.2wt% Mg; 1.2wt%-1.8wt% Cu; 0.05wt%-0.08wt% Ti; 0.10wt%-0.15wt% Cr; Re; and the balance Al; Among them, the mass fraction values ​​of Re and Ti satisfy the following formula: x+2y=0.1; x = Ti mass fraction value; y = Re mass fraction value.

2. The high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 1, characterized in that: The grain size of the aluminum alloy material in the T6 state is 55-60 μm.

3. The high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 1, characterized in that: The Re is a mixture of Ce and La; The mixing mass ratio of Ce to La is 2:

1.

4. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Prepare the first molten liquid: according to the designed composition, aluminum ingot, magnesium ingot, industrial silicon, Al-Mn master alloy, Al-Cu master alloy, Al-Cr master alloy are added into the smelting furnace in sequence, heated to 620-630° C., kept warm, and after all the raw materials are melted, the first molten liquid is obtained; S2, preparing a second molten liquid: adding Al-Ni master alloy and Al-Mo master alloy to the first molten liquid, then adjusting the temperature to 640-660° C., keeping the temperature, and stirring for 10-12 minutes to obtain a second molten liquid; S3, preparing a third molten liquid: adding Al-Re master alloy and Al-Ti master alloy to the second molten liquid, then adjusting the temperature to 710-730° C., stirring and mixing for 15 minutes, and then refining, blowing and slagging to obtain a third molten liquid; S4, obtaining a finished product: injecting the third molten liquid into a mold for casting, and heat treatment to obtain an aluminum alloy strip; Wherein, in step S4, the heat treatment is: heating the aluminum alloy strip to 315°C, keeping it warm for 4 hours, then cooling it to 150°C, keeping it warm for 2 hours, and naturally cooling it to room temperature.

5. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 4, characterized in that: The heating rate in S1 is 10°C / s.

6. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 4, characterized in that: In S2, the heating rate is 15°C / s and the stirring speed is 100 r / min.

7. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 4, characterized in that: In S3, the heating rate is 10°C / s and the stirring speed is 120 r / min.

8. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 4, characterized in that: Refined to: adding a refining agent to the second molten liquid; The refining agent composition is: Potassium chloride, sodium chloride, and calcium fluoride, wherein the mixing mass ratio of potassium chloride, sodium chloride, and calcium fluoride is 3:2:0.3; The amount of the refining agent added is 0.013-0.015% of the mass of the second molten liquid.

9. The method for preparing a high-strength, corrosion-resistant aluminum alloy material for an aerosol can according to claim 8, characterized in that: The slag removal process is as follows: pure nitrogen is used to purge from the bottom of the melt for 18 minutes, and the slag removal is performed after the purging is completed.

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