Surface treatment method of aluminum product

Abstract

The invention relates to the technical field of aluminum products, in particular to an aluminum product surface treatment method which comprises the following steps: S1, cleaning treatment: washing, degreasing and deoiling the surface of an aluminum product to complete cleaning treatment of the aluminum product; s2, roughening treatment is conducted, specifically, the surface of the aluminum product subjected to cleaning treatment is soaked, etched and cleaned, and roughening treatment of the aluminum product is completed; and S3, heat treatment is conducted, specifically, the aluminum product subjected to roughening treatment is subjected to heat treatment. According to the method, heat treatment is conducted on the aluminum product after etching treatment, under high-temperature heat treatment, in the thermal expansion process of the aluminum product, the internal stress of the aluminum product can change, and due to the fact that an irregular etching structure exists on the surface of the aluminum product, deformation of the etching position is aggravated; therefore, the rough etching structure on the surface of the aluminum product can be further enriched, the coating layer and the surface of the aluminum product are further stably combined, and the surface treatment effect of the aluminum product is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum products, in particular to a surface treatment method for aluminum products. Background Art

[0002] Aluminum products are products made of aluminum as the main component. Aluminum is a chemical element that is widely present in nature in the form of compounds. Alloyed aluminum products are often superior in performance and can meet the needs of different usage scenarios.

[0003] In the prior art, for the surface treatment of aluminum products, a protective layer is usually formed on the surface of the aluminum products by cladding to improve the surface strength of the aluminum products. However, the combination of the coating layer and the aluminum products will have adhesion defects, which affects the performance of the aluminum products. Based on this, the present invention provides a surface treatment method for aluminum products. Summary of the invention

[0004] The purpose of the present invention is to provide a surface treatment method for aluminum products. The aluminum products treated by the surface treatment method for aluminum products of the present invention not only have good wear resistance, but also have excellent hardness performance, thereby effectively improving the performance of the aluminum products.

[0005] To achieve the above object, the present invention provides the following technical solutions: A surface treatment method for an aluminum product comprises the following steps: S1: cleaning treatment, washing, degreasing and deoiling the surface of the aluminum product to complete the cleaning treatment of the aluminum product; S2: Roughening treatment, the surface of the aluminum product that has been cleaned is immersed in etching and cleaned to complete the roughening treatment of the aluminum product; S3: heat treatment, heat treatment of the aluminum product after roughening treatment; S4: coating treatment, preparing a coating material, and using a cladding spraying process to form a coating layer on the surface of the aluminum product that has completed the heat treatment, thereby completing the coating treatment of the aluminum product; S5: Wetting treatment: the aluminum product after coating is subjected to wetting treatment to complete the surface treatment of the aluminum product.

[0006] Furthermore, the cleaning method is: the aluminum product is rinsed with deionized water for 6 to 10 times, then immersed in kerosene and scrubbed to complete the cleaning of the aluminum product.

[0007] Furthermore, the roughening treatment method of the aluminum product is as follows: the aluminum product is immersed in the etching solution, the immersion container is kept in a stirring state, the immersion time is 10 to 20 minutes, the aluminum product is taken out after immersion, and is left to stand for 6 to 10 minutes, and then turned over and immersed in the etching solution again, the immersion time is 10 to 20 minutes, after the immersion etching is completed, the surface of the aluminum product is rinsed with deionized water to complete the roughening treatment of the aluminum product, wherein the etching solution is kept warm at 50 to 60°C during the immersion process.

[0008] Furthermore, the raw materials of the etching solution are composed of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water, and the mass ratio of the phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water is 1: (0.1-0.3): (0.2-0.4): (0.04-0.06): (4-6).

[0009] Furthermore, the etching solution is prepared by the following method: deionized water, phosphoric acid, nitric acid and acetic acid are added to a reactor, the reactor temperature is set to 40-50°C, the stirring speed is 200-300r / min, and the reactor is kept warm and stirred for 10-20min, then sodium dodecyl sulfate is added, the heat preservation state is maintained, the stirring speed is 300-400r / min, and the reactor is kept warm and stirred for 6-10min to prepare the etching solution.

[0010] Furthermore, the heat treatment method of the aluminum product is as follows: the aluminum product is put into a high-temperature furnace, the high-temperature furnace is set to a heating rate of 20 to 30°C / min, after heating to 400 to 500°C, it is kept warm for 8 to 12 minutes, when the temperature is raised to 160°C, argon gas is introduced into the high-temperature furnace, and the argon gas introduction time is 5 minutes. After the insulation time is over, the high-temperature furnace is set to a temperature of 120 to 160°C, and the aluminum product is placed in the high-temperature furnace for insulation to complete the heat treatment of the aluminum product.

[0011] Furthermore, the raw materials of the coating material are composed of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash, and the mass ratio of the aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash is 1: (0.4-0.6): (0.6-0.8): (1.2-1.4): (0.4-0.6): (0.4-0.6), and each raw material is selected from powders sieved with 1000 mesh.

[0012] Furthermore, the coating material is prepared by the following method: each raw material is added into a mixer, the mixer is set at 400-500r / min and stirred for 10-20min, the mixture obtained in the mixer after stirring is sent into an oven, the oven is set at 80-120°C and dried for 4-6h to prepare the coating material.

[0013] Furthermore, the coating treatment method of the aluminum product is as follows: the aluminum product is placed in a nitrogen environment, the ion cladding device is loaded with a coating material to perform cladding treatment on the surface of the aluminum product, the ion cladding device is set with a current of 80 to 100 A, a feed rate of 20 to 24 g / min, a travel rate of 4 to 6 mm / s, and a nozzle spacing of 4 to 8 cm. After spraying is completed, the aluminum product is cooled to room temperature to complete the coating treatment.

[0014] Furthermore, the aluminum product infiltration treatment method is as follows: the aluminum product is immersed in boiling pure water for 10 to 20 minutes. After the immersion is completed, the aluminum product is rinsed and sent to an oven. The oven is set at 70 to 90° C. for drying for 2 to 4 hours to complete the surface treatment of the aluminum product.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by coating the surface of the aluminum product, a dense protective structure is formed on the surface of the aluminum product after cladding spraying, which effectively improves the surface strength of the aluminum product. In the process of surface treatment of the aluminum product, by etching the aluminum product, a rich pore structure is generated on the surface of the aluminum product, which improves the surface roughness of the aluminum product, so that the aluminum product can be effectively and firmly combined with the coating material to form a coating layer, thereby improving the use effect of the coating layer. By heat treating the aluminum product after etching, under high-temperature heat treatment, during the thermal expansion process of the aluminum product, the internal stress of the aluminum product will change. Due to the presence of irregular etching structures on the surface of the aluminum product, the deformation of the etching position is aggravated, thereby further enriching the rough etching structure on the surface of the aluminum product, so that the coating layer and the surface of the aluminum product are further firmly combined, thereby improving the surface treatment effect of the aluminum product.

[0016] 2. In the present invention, argon gas is introduced during the heat treatment of aluminum products. Argon gas serves as a uniform heat transfer medium. During the heat treatment of aluminum products, local overheating or overcooling of the aluminum products is avoided, ensuring that the aluminum products are heated evenly. Uneven heating of the aluminum products is avoided, which leads to rough surface structure and uneven structure, affecting the control of coating thickness, and further improving the surface treatment effect of the aluminum products. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that the raw materials used in the following examples are all commercially available raw materials.

[0019] Embodiment 1:

[0020] The following steps are involved: S1: cleaning treatment, washing, degreasing and deoiling the surface of the aluminum product to complete the cleaning treatment of the aluminum product; S2: Roughening treatment, the surface of the aluminum product that has been cleaned is immersed in etching and cleaned to complete the roughening treatment of the aluminum product; S3: heat treatment, the aluminum product after roughening treatment is heat treated; S4: coating treatment, preparing a coating material, and using a cladding spraying process to form a coating layer on the surface of the aluminum product that has completed the heat treatment, thereby completing the coating treatment of the aluminum product; S5: Wetting treatment: the aluminum product after coating is subjected to wetting treatment to complete the surface treatment of the aluminum product.

[0021] The cleaning method is: the aluminum product is rinsed with deionized water for 10 times, then immersed in kerosene and scrubbed to complete the cleaning of the aluminum product.

[0022] The roughening treatment method of aluminum products is as follows: the aluminum products are immersed in the etching solution, the immersion container is kept in a stirring state, the immersion time is 20 minutes, the aluminum products are taken out after immersion, left to stand for 10 minutes, turned over and immersed in the etching solution again, the immersion time is 20 minutes, after the immersion etching is completed, the surface of the aluminum products is rinsed with deionized water to complete the roughening treatment of the aluminum products, wherein the etching solution is kept warm at 60°C during the immersion process.

[0023] The raw materials of the etching solution are composed of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water. The mass ratio of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water is 1: (0.3): (0.4): (0.06): (6).

[0024] The etching solution is prepared by the following method: deionized water, phosphoric acid, nitric acid and acetic acid are added into a reactor, the reactor temperature is set to 50°C, the stirring speed is 300r / min, and the reactor is kept warm and stirred for 20 minutes, then sodium dodecyl sulfate is added, the reactor is kept warm, the stirring speed is 400r / min, and the reactor is kept warm and stirred for 10 minutes to prepare the etching solution.

[0025] The heat treatment method of aluminum products is as follows: the aluminum products are sent into a high-temperature furnace, the high-temperature furnace is set to a heating rate of 30°C / min, after heating to 500°C, it is kept warm for 12 minutes, and when the temperature is raised to 160°C, argon gas is introduced into the high-temperature furnace for 5 minutes. After the insulation time is over, the high-temperature furnace is set to 160°C, and the aluminum products are placed in the high-temperature furnace for insulation to complete the heat treatment of the aluminum products.

[0026] The raw materials of the coating material are composed of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash. The mass ratio of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash is 1: (0.6): (0.8): (1.4): (0.6): (0.6). All raw materials are powders sieved with 1000 mesh.

[0027] The coating material is prepared by the following method: each raw material is added into a mixer, the mixer is set to 500r / min and stirred for 20min, the mixture in the mixer after stirring is sent into an oven, the oven is set to 120°C and dried for 6h to prepare the coating material.

[0028] The coating treatment method of aluminum products is as follows: the aluminum products are placed in a nitrogen environment, the ion cladding device is loaded with coating material to perform cladding treatment on the surface of the aluminum products, the ion cladding device is set with a current of 100A, a feed rate of 24g / min, a travel rate of 6mm / s, and a nozzle spacing of 8cm. After spraying is completed, it is cooled to room temperature to complete the coating treatment of the aluminum products.

[0029] The method of aluminum product infiltration treatment is as follows: the aluminum product is immersed in boiling pure water for 120 minutes. After the immersion is completed, the aluminum product is rinsed and sent to an oven. The oven is set at 90°C for drying for 4 hours to complete the surface treatment of the aluminum product.

[0030] Embodiment 2:

[0031] The following steps are involved: S1: cleaning treatment, washing, degreasing and deoiling the surface of the aluminum product to complete the cleaning treatment of the aluminum product; S2: Roughening treatment, the surface of the aluminum product that has been cleaned is immersed in etching and cleaned to complete the roughening treatment of the aluminum product; S3: heat treatment, the aluminum product after roughening treatment is heat treated; S4: coating treatment, preparing a coating material, and using a cladding spraying process to form a coating layer on the surface of the aluminum product that has completed the heat treatment, thereby completing the coating treatment of the aluminum product; S5: Wetting treatment: the aluminum product after coating is subjected to wetting treatment to complete the surface treatment of the aluminum product.

[0032] The cleaning method is: the aluminum product is rinsed with deionized water for 6 times, then immersed in kerosene and scrubbed to complete the cleaning of the aluminum product.

[0033] The roughening treatment method of aluminum products is as follows: the aluminum products are immersed in the etching solution, the immersion container is kept in a stirring state, the immersion time is 10 minutes, the aluminum products are taken out after immersion, left to stand for 6 minutes, turned over and immersed in the etching solution again, the immersion time is 10 minutes, after the immersion etching is completed, the surface of the aluminum products is rinsed with deionized water to complete the roughening treatment of the aluminum products, wherein the etching solution is kept warm at 50°C during the immersion process.

[0034] The raw materials of the etching solution are composed of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water. The mass ratio of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water is 1: (0.1): (0.2): (0.04): (4).

[0035] The etching solution is prepared by the following method: deionized water, phosphoric acid, nitric acid and acetic acid are added into a reactor, the reactor temperature is set to 40°C, the stirring speed is 200r / min, and the reactor is kept warm and stirred for 10 minutes, then sodium dodecyl sulfate is added, the reactor is kept warm, the stirring speed is 300r / min, and the reactor is kept warm and stirred for 6 minutes to prepare the etching solution.

[0036] The heat treatment method of aluminum products is as follows: the aluminum products are sent into a high-temperature furnace, the high-temperature furnace is set to a heating rate of 20°C / min, after heating to 400°C, it is kept warm for 8 minutes, and when the temperature is raised to 160°C, argon gas is introduced into the high-temperature furnace for 5 minutes. After the insulation time is over, the high-temperature furnace is set to 120°C, and the aluminum products are placed in the high-temperature furnace for insulation to complete the heat treatment of the aluminum products.

[0037] The raw materials of the coating material are composed of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash. The mass ratio of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash is 1: (0.4): (0.6): (1.2): (0.4): (0.4). All raw materials are powders sieved with 1000 mesh.

[0038] The coating material is prepared by the following method: each raw material is added into a mixer, the mixer is set to 400r / min and stirred for 10 minutes, the mixture in the mixer after stirring is sent into an oven, the oven is set to 80°C and dried for 4 hours to prepare the coating material.

[0039] The coating treatment method of aluminum products is as follows: the aluminum products are placed in a nitrogen environment, the ion cladding device is loaded with coating material to perform cladding treatment on the surface of the aluminum products, the ion cladding device is set with a current of 80A, a feed rate of 20g / min, a travel rate of 4mm / s, and a nozzle spacing of 4cm. After spraying is completed, it is cooled to room temperature to complete the coating treatment of the aluminum products.

[0040] The method of aluminum product infiltration treatment is as follows: the aluminum product is immersed in boiling pure water for 10 minutes. After the immersion is completed, the aluminum product is rinsed and sent to an oven. The oven is set at 70°C for drying for 2 hours to complete the surface treatment of the aluminum product.

[0041] Embodiment three:

[0042] The following steps are involved: S1: cleaning treatment, washing, degreasing and deoiling the surface of the aluminum product to complete the cleaning treatment of the aluminum product; S2: Roughening treatment, the surface of the aluminum product that has been cleaned is immersed in etching and cleaned to complete the roughening treatment of the aluminum product; S3: heat treatment, the aluminum product after roughening treatment is heat treated; S4: coating treatment, preparing a coating material, and using a cladding spraying process to form a coating layer on the surface of the aluminum product that has completed the heat treatment, thereby completing the coating treatment of the aluminum product; S5: Wetting treatment: the aluminum product after coating is subjected to wetting treatment to complete the surface treatment of the aluminum product.

[0043] The cleaning method is: the aluminum product is rinsed 8 times with deionized water, then immersed in kerosene, and brushed to complete the cleaning of the aluminum product.

[0044] The roughening treatment method of aluminum products is as follows: the aluminum products are immersed in the etching solution, and the stirring state is maintained in the immersion container for 15 minutes. After immersion, the aluminum products are taken out, left to stand for 8 minutes, turned over and immersed in the etching solution again for 15 minutes. After the immersion etching is completed, the surface of the aluminum products is rinsed with deionized water to complete the roughening treatment of the aluminum products. During the immersion process, the etching solution is kept warm at 55°C.

[0045] The raw materials of the etching solution are composed of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water. The mass ratio of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water is 1: (0.2): (0.3): (0.05): (5).

[0046] The etching solution is prepared by the following method: deionized water, phosphoric acid, nitric acid and acetic acid are added into a reactor, the reactor temperature is set to 45°C, the stirring speed is 250r / min, and the reactor is kept warm and stirred for 15 minutes, then sodium dodecyl sulfate is added, the reactor is kept warm, the stirring speed is 350r / min, and the reactor is kept warm and stirred for 8 minutes to prepare the etching solution.

[0047] The heat treatment method of aluminum products is as follows: the aluminum products are sent into a high-temperature furnace, the high-temperature furnace is set to a heating rate of 25°C / min, after heating to 450°C, it is kept warm for 10 minutes, and when the temperature is raised to 160°C, argon gas is introduced into the high-temperature furnace for 5 minutes. After the insulation time is over, the high-temperature furnace is set to 140°C, and the aluminum products are placed in the high-temperature furnace for insulation to complete the heat treatment of the aluminum products.

[0048] The raw materials of the coating material are composed of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash. The mass ratio of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash is 1: (0.5): (0.7): (1.3): (0.5): (0.5). All raw materials are powders sieved with 1000 mesh.

[0049] The coating material is prepared by the following method: each raw material is added into a mixer, the mixer is set to 450r / min and stirred for 15 minutes, the mixture in the mixer after stirring is sent into an oven, the oven is set to 100°C and dried for 5 hours to prepare the coating material.

[0050] The coating treatment method for aluminum products is as follows: the aluminum products are placed in a nitrogen environment, the ion cladding device is loaded with coating material to perform cladding treatment on the surface of the aluminum products, the ion cladding device is set with a current of 90A, a feed rate of 22g / min, a travel rate of 5mm / s, and a nozzle spacing of 6cm. After spraying is completed, it is cooled to room temperature to complete the coating treatment of the aluminum products.

[0051] The method of aluminum product infiltration treatment is as follows: the aluminum product is immersed in boiling pure water for 15 minutes. After the immersion is completed, the aluminum product is rinsed and sent to an oven. The oven is set at 80°C for drying for 3 hours to complete the surface treatment of the aluminum product.

[0052] Comparative Example 1: The difference between this comparative example and Example 1 is that in this comparative example, argon gas is not introduced during the heat treatment.

[0053] Comparative Example 2: The difference between this comparative example and Example 1 is that no coating treatment is performed in this comparative example.

[0054] Comparative Example 3: The difference between this comparative example and Example 1 is that no heat treatment is performed in this comparative example.

[0055] Comparative Example 4: The difference between this comparative example and Example 1 is that no roughening treatment is performed in this comparative example.

[0056] Performance test: The aluminum products treated in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were subjected to performance tests, and the test data obtained are recorded in the following table:

[0057] In the performance test, a wear tester was used to perform wear tests on the aluminum products treated with Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4. The abrasive hardness was 60HRC, the rotation speed was 300r / min, the contact load was 6kg, and the total wear test time was 45min. The weight of the aluminum products was recorded before and after the wear test, and the friction mass loss data of the aluminum products treated with Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were obtained.

[0058] Among them, the friction mass losses of the aluminum products after treatment in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were 13.1 mg, 12.8 mg, 13.3 mg, 23.1 mg, 23.1 mg, 24.2 mg and 25.1 mg respectively; The Brinell hardness of the aluminum products after treatment in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are 65HB, 66HB, 63HB, 51HB, 53HB, 47HB and 53HB respectively.

[0059] It can be seen that the wear resistance and hardness data of the aluminum products after treatment in Comparative Examples 1, 2, 3 and 4 are lower than those in Examples 1, 2 and 3; this shows that: through the coating treatment on the surface of the aluminum product, a dense protective structure is formed on the surface of the aluminum product after cladding spraying, which effectively improves the surface strength of the aluminum product. In the process of surface treatment of the aluminum product, through the etching treatment of the aluminum product, a rich pore structure is generated on the surface of the aluminum product, and the surface roughness of the aluminum product is improved, so that the aluminum product can be effectively and firmly combined with the coating material to form a coating layer, thereby improving the use effect of the coating layer. Through the heat treatment of the aluminum product after the etching treatment, under high-temperature heat treatment, during the thermal expansion process of the aluminum product, the internal stress of the aluminum product will change. Due to the presence of irregular etching structures on the surface of the aluminum product, the deformation of the etching position is aggravated, thereby further enriching the rough etching structure on the surface of the aluminum product, so that the coating layer and the surface of the aluminum product are further firmly combined, thereby improving the surface treatment effect of the aluminum product.

[0060] By comparing and analyzing the relevant data in the table, it can be seen that the aluminum product treated by the surface treatment method of the aluminum product of the present invention not only has good wear resistance, but also has excellent hardness performance. This shows that the surface treatment method of the aluminum product provided by the present invention has a broader market prospect and is more suitable for promotion.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A surface treatment method for aluminum products, characterized in that: The following steps are involved: S1: cleaning treatment, washing, degreasing and deoiling the surface of the aluminum product to complete the cleaning treatment of the aluminum product; S2: Roughening treatment, the surface of the aluminum product that has been cleaned is immersed in etching and cleaned to complete the roughening treatment of the aluminum product; S3: heat treatment, heat treatment of the aluminum product after roughening treatment; S4: coating treatment, preparing a coating material, and using a cladding spraying process to form a coating layer on the surface of the aluminum product that has completed the heat treatment, thereby completing the coating treatment of the aluminum product; S5: Wetting treatment: the aluminum product after coating is subjected to wetting treatment to complete the surface treatment of the aluminum product.

2. The surface treatment method of aluminum products according to claim 1, characterized in that: The cleaning method is as follows: the aluminum product is rinsed with deionized water for 6 to 10 times, then immersed in kerosene and scrubbed to complete the cleaning of the aluminum product.

3. The surface treatment method of aluminum products according to claim 1, characterized in that: The roughening treatment method of the aluminum product is as follows: the aluminum product is immersed in an etching solution, and a stirring state is maintained in the immersion container for 10 to 20 minutes. After immersion, the aluminum product is taken out, left to stand for 6 to 10 minutes, turned over and immersed in the etching solution again for 10 to 20 minutes. After the immersion etching is completed, the surface of the aluminum product is rinsed with deionized water to complete the roughening treatment of the aluminum product, wherein the etching solution is kept warm at 50 to 60° C. during the immersion process.

4. The surface treatment method of aluminum products according to claim 3, characterized in that: The raw materials of the etching solution are composed of phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water, and the mass ratio of the phosphoric acid, nitric acid, acetic acid, sodium dodecyl sulfate and deionized water is 1: (0.1-0.3): (0.2-0.4): (0.04-0.06): (4-6).

5. The surface treatment method of aluminum products according to claim 3, characterized in that: The etching solution is prepared by the following method: deionized water, phosphoric acid, nitric acid and acetic acid are added into a reaction kettle, the temperature of the reaction kettle is set at 40-50°C, the stirring speed is 200-300r / min, the temperature is kept and stirred for 10-20min, then sodium dodecyl sulfate is added, the temperature is kept, the stirring speed is 300-400r / min, the temperature is kept and stirred for 6-10min, and the etching solution is prepared.

6. The surface treatment method of aluminum products according to claim 1, characterized in that: The heat treatment method of the aluminum product is as follows: the aluminum product is sent into a high-temperature furnace, the high-temperature furnace is set to a heating rate of 20 to 30°C / min, after heating to 400 to 500°C, it is kept warm for 8 to 12 minutes, when the temperature is raised to 160°C, argon gas is introduced into the high-temperature furnace, and the argon gas introduction time is 5 minutes. After the insulation time is over, the high-temperature furnace is set to a temperature of 120 to 160°C, and the aluminum product is placed in the high-temperature furnace for insulation to complete the heat treatment of the aluminum product.

7. The surface treatment method of aluminum products according to claim 1, characterized in that: The raw materials of the coating material are composed of aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash, and the mass ratio of the aluminum, lanthanum, platinum, hafnium, ammonium chloride and rice husk ash is 1: (0.4-0.6): (0.6-0.8): (1.2-1.4): (0.4-0.6): (0.4-0.6), and each raw material is selected from powders sieved with 1000 mesh.

8. The surface treatment method of aluminum products according to claim 7, characterized in that: The coating material is prepared by the following method: various raw materials are added into a mixer, the mixer is set at 400-500 r / min for stirring for 10-20 min, the mixture obtained in the mixer after stirring is sent into an oven, the oven is set at 80-120° C. for drying for 4-6 h, and the coating material is prepared.

9. The surface treatment method of aluminum products according to claim 1, characterized in that: The coating treatment method of the aluminum product is as follows: the aluminum product is placed in a nitrogen environment, and the ion cladding device is loaded with a coating material to perform cladding treatment on the surface of the aluminum product. The ion cladding device is set with a current of 80 to 100 A, a feed rate of 20 to 24 g / min, a travel rate of 4 to 6 mm / s, and a nozzle spacing of 4 to 8 cm. After spraying is completed, the aluminum product is cooled to room temperature to complete the coating treatment.

10. The surface treatment method of aluminum products according to claim 1, characterized in that: The aluminum product infiltration treatment method is as follows: the aluminum product is immersed in boiling pure water for 10 to 20 minutes, and after the immersion is completed, the aluminum product is rinsed and sent to an oven, and the oven is set at 70 to 90° C. for drying for 2 to 4 hours to complete the surface treatment of the aluminum product.

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