Corrosion-resistant aluminum alloy material and method for manufacturing the same

Abstract

The application provides a kind of corrosion-resistant aluminum alloy material and its preparation method, comprising the following steps: uniformly mixing, stirring Ni60A self-fluxing alloy, WC powder and Nd2O3 powder to obtain mixed powder; taking aluminum alloy substrate, ultrasonic cleaning surface with acetone; injecting Sc with ion implanter; coating mixed powder on the surface of aluminum alloy substrate through organic binder; drying, and performing cyclic oxidation in 900 DEG C air; taking out, scanning with CO2 laser, and obtaining the product. The application adopts rare earth element Sc oxidation, rapidly oxidizes to form dispersed Sc2O3 particles, makes it become the nucleation center of self-fluxing alloy component Cr to form Cr2O3, promotes the rapid formation of Cr2O3 oxide film and the refinement of oxide film grain, and improves the close and firm combination between oxide film and aluminum alloy substrate, and improves corrosion resistance; the application also adopts rare earth oxide Nd2O3 to accelerate the dissolution and reprecipitation process of WC powder, reduces the tendency of stress corrosion, promotes tungsten and the component Cr in self-fluxing alloy to form intermetallic compound, and improves corrosion resistance.

Description

Technical Field

[0001] This invention relates to the technical field of aluminum alloy materials, and specifically to a corrosion-resistant aluminum alloy material and its preparation method. Background Technology

[0002] Aluminum is the second largest metal material in terms of production volume after steel. Due to its excellent performance, wide range of applications, large demand, and low recycling costs, it is known as the "universal metal." Statistics show that 113 out of 124 industries in my country use aluminum products, with an industrial linkage rate as high as 91%. Therefore, the aluminum industry is one of the important pillar raw material industries for the sustained development of the national economy. In recent decades, aluminum alloys have developed in two main directions: one is the development of new high-strength and high-toughness aluminum alloy materials; the other is the development of a series of civilian aluminum alloy materials that can meet various application conditions. However, aluminum alloys often fail due to corrosion in practical applications, which not only causes significant economic losses but also frequently leads to accidents. Losses caused by corrosion of metals and equipment account for 2%-4% of the GDP annually; therefore, improving the corrosion resistance of aluminum alloys has always been an urgent problem to be solved. Summary of the Invention

[0003] Technical Problem to be Solved: To address the aforementioned technical problems, the present invention aims to provide a corrosion-resistant aluminum alloy material and its preparation method. Firstly, rare earth element Sc is injected into the surface of the aluminum alloy, followed by cyclic oxidation. Due to the strong affinity of Sc for oxygen, it rapidly oxidizes to form dispersed Sc2O3 particles, which become nucleation centers for the formation of Cr2O3 from the self-fluxing alloy component Cr. This promotes the rapid formation of the Cr2O3 oxide film and the refinement of the oxide film grains, while simultaneously improving the tightness and strength of the bond between the oxide film and the aluminum alloy substrate, thus enhancing corrosion resistance. Furthermore, a composite of rare earth elements and rare earth oxides is used to improve the corrosion resistance of the corrosion-resistant layer. The addition of rare earth oxide Nd2O3 accelerates the dissolution and reprecipitation process of WC powder, resulting in a smoother surface shape for its particles. This alleviates localized stress, reduces the potential difference between different areas, and decreases the tendency for stress corrosion. Simultaneously, it promotes the formation of intermetallic compounds between tungsten and Cr in the self-fluxing alloy, further improving corrosion resistance.

[0004] Technical solution: A corrosion-resistant aluminum alloy material, wherein a corrosion-resistant coating is applied to the surface of an aluminum alloy substrate.

[0005] Furthermore, the composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37 wt.%, Mg 3.2 wt.%, Si 0.2 wt.%, Zn 0.5 wt.%, with the balance being Al.

[0006] The preparation method of the above-mentioned corrosion-resistant aluminum alloy material includes the following steps:

[0007] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder and 0.5-1.5 parts of Nd2O3 powder evenly to obtain a mixed powder;

[0008] Step 2: Take the aluminum alloy substrate and ultrasonically clean the surface with acetone;

[0009] Step 3: Inject (1-3)×10 using an ion implanter 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0010] Step 4: Apply the mixed powder to the surface of the aluminum alloy substrate using an organic binder to a thickness of 1 mm;

[0011] Step 5: Drying, followed by 120 hours of cyclic oxidation in air at 900℃;

[0012] Step 6: Remove and scan with a CO2 laser to obtain the product.

[0013] Furthermore, the Ni60A self-fluxing alloy composition is 17% Cr, 3.5% B, 4% Si, 1.0% C, 3.3% Fe, with the remainder being Ni, and the powder particle size is <320 mesh.

[0014] Furthermore, the WC powder has a particle size of 140-325 mesh; the Nd2O3 powder has a particle size of 200-400 mesh.

[0015] Furthermore, the organic binder includes sodium carboxymethyl cellulose, phenolic resin, ketone-aldehyde resin, epoxy resin, and furan resin.

[0016] Furthermore, the cyclic oxidation is a cycle of 22 minutes of holding at 900°C followed by 8 minutes of air cooling.

[0017] Furthermore, the scanning conditions of the CO2 laser are as follows: laser power of 2-4kW, spot diameter of approximately 7.0mm, scanning rate of 8-10mm / s, argon protection, and single-channel scanning only during laser scanning.

[0018] Beneficial effects:

[0019] 1. This invention first involves injecting rare earth element Sc into the surface of an aluminum alloy and then performing cyclic oxidation. Because Sc has a strong affinity for oxygen, it rapidly oxidizes to form dispersed Sc2O3 particles, which become nucleation centers for the formation of Cr2O3 from the self-fluxing alloy component Cr. This promotes the rapid formation of the Cr2O3 oxide film and the refinement of the oxide film grains. At the same time, it improves the tightness and firmness of the bond between the oxide film and the aluminum alloy substrate, thereby improving corrosion resistance.

[0020] 2. This invention also employs rare earth elements and rare earth oxides to improve the corrosion resistance of the corrosion-resistant layer. The addition of rare earth oxide Nd2O3 can accelerate the dissolution and reprecipitation process of WC powder, making its particles have a smoother surface shape, thus relieving local stress, reducing the potential difference in each area, reducing the tendency of stress corrosion, and at the same time promoting the formation of intermetallic compounds between tungsten and Cr in the self-fluxing alloy, thereby improving corrosion resistance. Detailed Implementation

[0021] This invention proposes a corrosion-resistant aluminum alloy material and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the following will provide a more detailed description of the invention with reference to specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0022] Example 1

[0023] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0024] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 0.5-1.5 parts of Nd2O3 powder until homogeneous to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0025] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0026] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0027] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0028] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0029] Example 2

[0030] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0031] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0032] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0033] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0034] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0035] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0036] Example 3

[0037] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0038] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1.5 parts of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0039] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0040] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0041] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0042] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0043] Example 4

[0044] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0045] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0046] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0047] Step 3: Inject 1×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0048] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0049] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0050] Example 5

[0051] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0052] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0053] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0054] Step 3: Inject 3×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0055] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0056] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0057] Example 6

[0058] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0059] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0060] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0061] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0062] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0063] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 2kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0064] Example 7

[0065] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0066] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0067] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0068] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0069] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0070] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 4kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning during laser scanning.

[0071] Example 8

[0072] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0073] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0074] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0075] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0076] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0077] Step 5: Drying, cyclic oxidation in air at 900℃ for 120h, followed by 22min holding at 900℃ and 8min air cooling; Step 6: Removal, scanning with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 8mm / s, argon protection, and single-channel scanning during laser scanning.

[0078] Example 9

[0079] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0080] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0081] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0082] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0083] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0084] Step 5: Drying, cyclic oxidation in air at 900℃ for 120 hours, followed by 22 minutes of holding at 900℃ and 8 minutes of air cooling.

[0085] Step 6: Remove and scan with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 10mm / s, argon protection, and single-channel scanning only.

[0086] Comparative Example 1

[0087] The difference between this embodiment and embodiment 2 is that Sc is not injected, specifically:

[0088] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0089] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0090] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0091] Step 3: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0092] Step 4: Drying, cyclic oxidation in air at 900℃ for 120 hours, followed by 22 minutes of holding at 900℃ and 8 minutes of air cooling.

[0093] Step 5: Remove and scan with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning only.

[0094] Comparative Example 2

[0095] The difference between this embodiment and Embodiment 2 is that continuous oxidation is used instead of cyclic oxidation, specifically:

[0096] A method for preparing a corrosion-resistant aluminum alloy material includes the following steps:

[0097] Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder, and 1 part of Nd2O3 powder evenly to obtain a mixed powder; the composition of Ni60A self-fluxing alloy is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh; the WC powder particle size is 140-325 mesh; the Nd2O3 powder particle size is 200-400 mesh;

[0098] Step 2: Take an aluminum alloy substrate. The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37wt.%, Mg 3.2wt.%, Si 0.2wt.%, Zn 0.5wt.%, and the balance is Al. Clean the surface with acetone using ultrasonic cleaning.

[0099] Step 3: Inject 2×10⁻⁶ ions using an ion implanter. 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV.

[0100] Step 4: Coat the mixed powder onto the surface of the aluminum alloy substrate with phenolic resin to a thickness of 1 mm;

[0101] Step 5: Drying, followed by continuous oxidation in air at 900℃ for 120 hours;

[0102] Step 6: Remove and scan with a CO2 laser. The conditions for CO2 laser scanning are: laser power of 3kW, spot diameter of approximately 7.0mm, scanning rate of 9mm / s, argon protection, and single-channel scanning only.

[0103] Corrosion resistance test: Materials from each example were subjected to a full immersion corrosion test at room temperature. The corrosive media were 1 mol / L sulfuric acid solution and sodium hydroxide solution, respectively, and the corrosion time was 50 h. The mass after corrosion was measured using an analytical balance, and the corrosion rate R was used to evaluate the corrosion resistance of the alloy material.

[0104] Where ω0 is the initial mass, ω is the mass after the test, A is the test area, and t is the test time.

[0105] Table 1

[0106]

Claims

1. A method for preparing a corrosion-resistant aluminum alloy material, characterized in that, Includes the following steps: Step 1: Mix 80 parts of Ni60A self-fluxing alloy, 20 parts of WC powder and 0.5-1.5 parts of Nd2O3 powder evenly to obtain a mixed powder; Step 2: Take the aluminum alloy substrate and ultrasonically clean the surface with acetone; Step 3: Inject (1-3) × 10 using an ion implanter 15 Sc 3+ / cm 2 The dosage of Sc was increased by an accelerating voltage of 60 kV. Step 4: Apply the mixed powder to the surface of the aluminum alloy substrate using an organic binder to a thickness of 1 mm; Step 5: Drying, followed by 120 hours of cyclic oxidation in air at 900℃; Step 6: Remove and scan with a CO2 laser to obtain the product; The cyclic oxidation consists of a 22-minute heat treatment at 900°C followed by an 8-minute air cooling cycle.

2. The method for preparing a corrosion-resistant aluminum alloy material according to claim 1, characterized in that, The Ni60A self-fluxing alloy composition is Cr 17%, B 3.5%, Si 4%, C 1.0%, Fe 3.3%, with the remainder being Ni, and the powder particle size is <320 mesh.

3. The method for preparing a corrosion-resistant aluminum alloy material according to claim 1, characterized in that, The WC powder has a particle size of 140-325 mesh; the Nd2O3 powder has a particle size of 200-400 mesh.

4. The method for preparing a corrosion-resistant aluminum alloy material according to claim 1, characterized in that, The composition of the aluminum alloy substrate by mass percentage is as follows: Cu 0.37 wt.%, Mg 3.2 wt.%, Si 0.2 wt.%, Zn 0.5 wt.%, with the balance being Al.

5. The method for preparing a corrosion-resistant aluminum alloy material according to claim 1, characterized in that, The organic binder includes sodium carboxymethyl cellulose, phenolic resin, ketone-aldehyde resin, epoxy resin, and furan resin.

6. The method for preparing a corrosion-resistant aluminum alloy material according to claim 1, characterized in that, The conditions for scanning the CO2 laser are as follows: laser power of 2-4kW, spot diameter of approximately 7.0mm, scanning rate of 8-10mm / s, argon protection, and single-channel scanning only.

7. The corrosion-resistant aluminum alloy material prepared by the preparation method according to any one of claims 1-6.

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