CN114318451A - Aluminum alloy surface treatment method - Google Patents
Aluminum alloy surface treatment method Download PDFInfo
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- CN114318451A CN114318451A CN202111597939.7A CN202111597939A CN114318451A CN 114318451 A CN114318451 A CN 114318451A CN 202111597939 A CN202111597939 A CN 202111597939A CN 114318451 A CN114318451 A CN 114318451A
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- aluminum alloy
- femtosecond laser
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- surface treatment
- graphene oxide
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004381 surface treatment Methods 0.000 title claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 26
- 238000002679 ablation Methods 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 4
- 230000001788 irregular Effects 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000009713 electroplating Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 244000137852 Petrea volubilis Species 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001453 impedance spectrum Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000007777 multifunctional material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
Disclosed is an aluminum alloy surface treatment method, comprising: polishing, cleaning and drying the aluminum alloy; the method comprises the following steps of (1) ablating the surface of the aluminum alloy by using femtosecond laser multifilaments; and preparing a reduced graphene oxide coating on the surface of the aluminum alloy. The method adopts a femtosecond laser multi-wire ablation mode, can realize metal surface micro-structuring in a high-efficiency large-area manner, improves the anti-reflection performance of the irregular aluminum alloy surface, and then adopts a potentiostatic method to electroplate graphene oxide, and finally can realize the high-efficiency large-area improvement of the anti-corrosion anti-reflection performance of the aluminum alloy surface.
Description
Technical Field
The invention belongs to the field of preparation of multifunctional materials, and particularly relates to an aluminum alloy surface treatment method.
Background
The aluminum alloy is widely applied to the field of aerospace based on the advantages of high strength and low density. However, aluminum alloys are chemically more reactive and therefore difficult to resist corrosion in harsh corrosive environments, resulting in increased maintenance costs and even aviation accidents. Meanwhile, the invisibility of the airplane cannot be improved based on the higher reflectivity of the aluminum alloy surface. Therefore, the realization of the corrosion resistance and the anti-reflection performance of the surface of the aluminum alloy is of great significance for further enhancing and improving the functions of the surface of the aluminum alloy. At present, the most effective means for reducing the reflectivity of the metal surface is to introduce a micro-nano structure on the metal surface to form a unique light trapping structure. However, the traditional method of introducing the micro-nano structure mostly adopts a preparation process with high energy consumption, high time consumption and high cost, and is not favorable for large-area preparation.
Disclosure of Invention
In view of the above, the present invention provides a method for treating an aluminum alloy surface, which can treat an irregular aluminum alloy surface over a large area and improve the corrosion resistance and anti-reflection performance of the irregular aluminum alloy surface.
In order to achieve the technical object, the present invention provides an aluminum alloy surface treatment method, including:
polishing, cleaning and drying the aluminum alloy;
the method comprises the following steps of (1) ablating the surface of the aluminum alloy by using femtosecond laser multifilaments;
and preparing a reduced graphene oxide coating on the surface of the aluminum alloy.
According to the embodiment of the invention, the center wavelength of the femtosecond laser multi-filament pulse is 800nm, the repetition frequency is 500Hz, and the pulse width is 35 fs.
According to an embodiment of the present invention, a femtosecond laser multi-filament is formed in a manner including:
the femtosecond laser pulse is focused by a spatial light modulator or a wedge prism and defocused by a plano-convex lens to form the femtosecond laser multi-filament.
According to an embodiment of the present invention, ablating an aluminum alloy surface using a femtosecond laser multi-filament includes:
placing the aluminum alloy on a mobile platform, and adjusting the position of the aluminum alloy to enable the aluminum alloy to be positioned at the center of the femtosecond laser multifilaments;
the ablation of the surface of the aluminum alloy is realized by controlling the movement of the moving platform.
According to the embodiment of the invention, the reduced graphene oxide coating is prepared on the irregular aluminum alloy surface by adopting a constant potential electroplating method.
According to the embodiment of the invention, in the constant potential electroplating method, the electroplating solution is a 5mg/mL graphene oxide solution, the cathode is a plating electrode, the anode is a platinum sheet electrode, the voltage is 20V, and the time is 10 min.
According to an embodiment of the present invention, the grinding process of the aluminum alloy includes grinding the aluminum alloy using sand paper.
According to an embodiment of the present invention, the cleaning treatment of the aluminum alloy includes:
cleaning the polished aluminum alloy by using deionized water;
and then, sequentially putting the aluminum alloy into acetone, ethanol and deionized water for ultrasonic cleaning.
According to the embodiment of the invention, the aluminum alloy is subjected to drying treatment in the environment with the temperature of about 60 ℃.
According to the aluminum alloy surface treatment method provided by the invention, a femtosecond laser multi-wire ablation mode is adopted, on one hand, the diameter of the optical wires of the femtosecond laser multi-wire is large and the number of the optical wires is large, so that large-area ablation of the aluminum alloy surface can be rapidly realized; on the other hand, the femtosecond laser multi-filament has uniform intensity and longer length, and can realize processing ablation on an irregular surface, thereby realizing metal surface micro-structuring in a high-efficiency large-area manner and improving the anti-reflection performance of the irregular aluminum alloy surface. And then, preparing a reduced graphene oxide coating on the surface of the ablated aluminum alloy, so that the corrosion resistance of the surface of the aluminum alloy is improved, and finally the purpose of improving the corrosion resistance and the anti-reflection performance of the surface of the irregular aluminum alloy is achieved.
Drawings
Fig. 1 schematically shows a step diagram of an aluminum alloy surface treatment method according to an embodiment of the present invention.
Fig. 2 schematically shows electrochemical impedance spectra of three samples according to an embodiment of the present invention.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
In recent years, femtosecond laser is widely used to induce microstructure based on the advantages of strong self-controllability and no pollution, however, the tightly focusing method is time-consuming and cannot be directly applied to irregular-shaped surfaces.
Femtosecond laser multifilaments are the result of a dynamic balance between multiple focusing and defocusing effects experienced by a non-linearly propagating intense laser beam, forming a macroscopic and stable plasma channel in air, whose length can range from a few centimeters to several hundred meters, and whose diameter is approximately 100-200 μm. When the peak power of the laser incident light pulse of the femtosecond laser is far larger than the self-focusing threshold power, the generation of a plurality of light filaments can be observed, and a plurality of filaments which are regularly distributed can be generated by utilizing the phase structure lens array which is distributed in space.
The reduced graphene oxide is an ideal anti-corrosion structure based on unique chemical inertness, thermal stability and two-dimensional structure, and can form a uniform and compact coating on the surface of a sample.
Based on the inventive concept, the invention provides an irregular aluminum alloy surface treatment method, which comprises the following steps:
polishing, cleaning and drying the aluminum alloy;
the method comprises the following steps of (1) ablating the surface of the aluminum alloy by using femtosecond laser multifilaments;
and preparing a reduced graphene oxide coating on the surface of the aluminum alloy.
According to the aluminum alloy surface treatment method provided by the invention, a femtosecond laser multi-wire ablation mode is adopted, on one hand, the diameter of the optical wires of the femtosecond laser multi-wire is large and the number of the optical wires is large, so that large-area ablation of the aluminum alloy surface can be rapidly realized; on the other hand, the femtosecond laser multi-filament has uniform intensity and longer length, and can realize processing ablation on an irregular surface, thereby realizing metal surface micro-structuring in a high-efficiency large-area manner and improving the anti-reflection performance of the irregular aluminum alloy surface. And then, electroplating graphene oxide by adopting a potentiostatic method, preparing a reduced graphene oxide coating on the surface of the ablated aluminum alloy by an electrochemical method, improving the corrosion resistance of the surface of the aluminum alloy, and finally realizing the high-efficiency large-area improvement of the corrosion resistance and the anti-reflection performance of the surface of the aluminum alloy.
Fig. 1 schematically shows a step diagram of an aluminum alloy surface treatment method according to an embodiment of the present invention, and as shown in fig. 1, the irregular aluminum alloy surface treatment method includes steps S01 to S03.
And operation S01, polishing, cleaning and drying the aluminum alloy.
According to an embodiment of the present invention, the grinding process of the aluminum alloy includes grinding the aluminum alloy using sand paper.
According to an embodiment of the present invention, the cleaning treatment of the aluminum alloy includes:
cleaning the polished aluminum alloy by using deionized water;
and then, sequentially putting the aluminum alloy into acetone, ethanol and deionized water for ultrasonic cleaning.
According to the embodiment of the invention, the aluminum alloy is subjected to drying treatment in the environment with the temperature of about 60 ℃.
In operation S02, the aluminum alloy surface is ablated using the femtosecond laser multi-filament.
According to the embodiment of the invention, the center wavelength of the femtosecond laser multi-filament pulse is 800nm, the repetition frequency is 500Hz, and the pulse width is 35 fs.
According to an embodiment of the present invention, a femtosecond laser multi-filament is formed in a manner including:
the femtosecond laser pulse is focused by a spatial light modulator or a wedge prism and defocused by a plano-convex lens to form the femtosecond laser multi-filament.
According to an embodiment of the present invention, ablating an aluminum alloy surface using a femtosecond laser multi-filament includes:
placing the aluminum alloy on a mobile platform, and adjusting the position of the aluminum alloy to enable the aluminum alloy to be positioned at the center of the femtosecond laser multifilaments;
the ablation of the surface of the aluminum alloy is realized by controlling the movement of the moving platform.
According to the embodiment of the invention, the anti-reflection property of the surface of the aluminum alloy can be regulated and controlled by adjusting the scanning speed of the femtosecond laser multi-wire, and the scanning speed of the femtosecond laser multi-wire influences the microstructure of the surface of the aluminum alloy after ablation, so that the anti-reflection property of the surface of the aluminum alloy is influenced.
According to the embodiment of the invention, a femtosecond laser multi-wire ablation mode is adopted, on one hand, the diameter of the optical wires of the femtosecond laser multi-wire is large and the number of the optical wires is large, so that the large-area ablation of the surface of the aluminum alloy can be rapidly realized; on the other hand, the femtosecond laser multi-filament has uniform intensity and longer length, and can realize processing ablation on an irregular surface, thereby realizing metal surface micro-structuring in a high-efficiency large-area manner and improving the anti-reflection performance of the irregular aluminum alloy surface.
In operation S03, a reduced graphene oxide coating is prepared on the surface of the aluminum alloy.
According to the embodiment of the invention, the reduced graphene oxide coating is prepared on the irregular aluminum alloy surface by adopting a constant potential electroplating method.
According to the embodiment of the invention, in the constant potential electroplating method, the electroplating solution is a 5mg/mL graphene oxide solution, the cathode is a plating electrode, the anode is a platinum sheet electrode, the voltage is 20V, and the time is 10 min.
According to the embodiment of the invention, the graphene oxide is electroplated by adopting a potentiostatic method, the reduced graphene oxide coating is prepared on the surface of the ablated aluminum alloy by an electrochemical method, the corrosion resistance of the surface of the aluminum alloy is improved, the electroplating method is also favorable for large-area preparation, and finally the corrosion resistance and the anti-reflection performance of the surface of the aluminum alloy can be improved efficiently and in a large area.
The surface treatment method of the irregular aluminum alloy will be described below by way of specific examples. It should be noted that the examples are only specific embodiments of the present invention, and are not intended to limit the present invention.
Step 1: firstly, polishing an aluminum alloy sheet by using sand paper, after washing by using deionized water, sequentially putting the aluminum alloy sheet into acetone, ethanol and deionized water for ultrasonic cleaning, and drying at 60 ℃ to obtain a sample 1 which is the aluminum alloy sheet.
Step 2: a femtosecond laser amplification system (for example, manufactured by Spectra-Physics company) generates polarized laser pulses with the central wavelength of 800nm and the pulse width of 35fs, and the polarized laser pulses pass through a spatial light modulator or a wedge prism in sequence and a plano-convex lens with an antireflection film and the focal length of 1m and are loosely focused in the air to generate regularly distributed femtosecond laser multifilaments with the repetition frequency of 500 Hz.
Placing an aluminum alloy sheet on a three-dimensional electric control moving platform, adjusting the aluminum alloy sheet to be positioned at the center of the femtosecond laser multi-wire, wherein the three-dimensional displacement platform is formed by combining three precise electric control displacement platforms and a right-angle fixed block (for example, a product of model RAB109 produced by Beijing optical century company), the horizontal direction adopts an electric control precise displacement platform of the Beijing optical century company (for example, a product of model MTS304, resolution of 0.00032mm and stroke of 200 mm), the vertical direction and the propagation direction of the femtosecond laser multi-wire also adopt the electric control precise displacement platform of the Beijing optical century company (for example, a product of model MTS204, resolution of 0.000078mm and stroke of 100 mm), and a stepping motor (for example, a product of model SC102 produced by the Beijing optical century company) is programmed by a computer to control the motion track of the three-dimensional displacement platform, the horizontal scanning speed can be adjusted according to requirements, in the example, the scanning speed is 2.5mm/s, and then patterned ablation on the aluminum alloy sheet is realized, so that a sample 2, namely the aluminum alloy sheet ablated by femtosecond laser multi-wire, is obtained.
And step 3: and electroplating oxidized graphene on the surface of the ablated aluminum alloy sheet, wherein the electroplating solution is prepared from a 5mg/mL oxidized graphene solution (for example, produced by Suzhou Cifeng graphene technologies), the cathode is a coating electrode, the anode is a platinum sheet electrode, and electroplating is carried out by adopting a constant voltage method, the electroplating voltage is 20V, and the electroplating time is 30 min. And carrying out reduction reaction on the graphene oxide at a cathode to generate reduced graphene oxide, and electroplating the reduced graphene oxide onto the surface of the aluminum alloy sheet to obtain a sample 3, wherein the sample is the aluminum alloy sheet which is ablated by femtosecond laser and has a reduced graphene oxide coating.
It will be appreciated by those skilled in the art that although the above lists related products manufactured by the above companies by way of example, the present invention is not limited thereto and the related products may be replaced with other products in case of being able to perform the same or similar functions of the related products.
Fig. 2 schematically shows electrochemical impedance spectrograms of three samples according to an embodiment of the present invention, where sample 1 is an aluminum alloy, sample 2 is an aluminum alloy subjected to femtosecond laser multi-filament ablation, and sample 3 is an aluminum alloy subjected to femtosecond laser multi-filament ablation and having a reduced graphene oxide coating, and corresponds to three impedance spectrograms in the figure, respectively, it can be seen that, compared with sample 1, the impedance radiuses of the aluminum alloys of sample 2 and sample 3 are gradually increased, which shows that the resistance thereof is gradually increased, a better blocking effect on electrolyte ion diffusion is exhibited, and the corrosion resistance is gradually enhanced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A surface treatment method of an aluminum alloy, comprising:
polishing, cleaning and drying the aluminum alloy;
ablating the surface of the aluminum alloy by using a femtosecond laser multi-wire;
and preparing a reduced graphene oxide coating on the surface of the aluminum alloy.
2. The surface treatment method according to claim 1, wherein the femtosecond laser multifilament pulse has a center wavelength of 800nm, a repetition frequency of 500Hz, and a pulse width of 35 fs.
3. The surface treatment method according to claim 1, wherein the femtosecond laser multifilaments are formed in a manner including:
the femtosecond laser pulse is focused by a spatial light modulator or a wedge prism and defocused by a plano-convex lens to form the femtosecond laser multi-filament.
4. The surface treatment method according to claim 3, wherein the plano-convex lens has a focal length of 1m and an antireflection film on the surface thereof.
5. The surface treatment method of claim 1, wherein ablating the aluminum alloy surface using a femtosecond laser multifilar comprises:
placing the aluminum alloy on a mobile platform, and adjusting the position of the aluminum alloy to enable the aluminum alloy to be positioned at the center of the femtosecond laser multifilaments;
and the ablation of the surface of the aluminum alloy is realized by controlling the movement of the moving platform.
6. The surface treatment method according to claim 1, wherein the reduced graphene oxide coating is prepared on the surface of the aluminum alloy by a potentiostatic plating method.
7. The surface treatment method according to claim 6, wherein in the potentiostatic plating method, the plating solution is a 5mg/mL graphene oxide solution, the cathode is a plated electrode, the anode is a platinum sheet electrode, the voltage is 20V, and the time is 10 min.
8. The surface treatment method according to claim 1, wherein the grinding treatment of the aluminum alloy includes grinding the aluminum alloy with sandpaper.
9. The surface treatment method according to claim 1, wherein the subjecting of the aluminum alloy to the cleaning treatment comprises:
cleaning the polished aluminum alloy by using deionized water;
and then, sequentially putting the aluminum alloy into acetone, ethanol and deionized water for ultrasonic cleaning.
10. The surface treatment method according to claim 1, wherein the aluminum alloy is subjected to the baking treatment in an environment at a temperature of about 60 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483058A (en) * | 2018-12-10 | 2019-03-19 | 吉林大学 | A method of rapid large-area remotely prepares super-hydrophobic antireflex structure on irregular metal curved surface |
| CN110116273A (en) * | 2019-06-05 | 2019-08-13 | 北京理工大学 | The method that femtosecond laser synergistic oxidation reaction prepares broad band anti-reflection structure |
| CN112091419A (en) * | 2020-09-17 | 2020-12-18 | 吉林大学 | Method for efficiently preparing flexible pressure sensor template based on hundred TW/cm2 magnitude high-intensity laser |
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- 2021-12-24 CN CN202111597939.7A patent/CN114318451A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483058A (en) * | 2018-12-10 | 2019-03-19 | 吉林大学 | A method of rapid large-area remotely prepares super-hydrophobic antireflex structure on irregular metal curved surface |
| CN110116273A (en) * | 2019-06-05 | 2019-08-13 | 北京理工大学 | The method that femtosecond laser synergistic oxidation reaction prepares broad band anti-reflection structure |
| CN112091419A (en) * | 2020-09-17 | 2020-12-18 | 吉林大学 | Method for efficiently preparing flexible pressure sensor template based on hundred TW/cm2 magnitude high-intensity laser |
Non-Patent Citations (1)
| Title |
|---|
| XINJIANG ET. AL.: "Anti-reflection graphene coating on metal surface", 《SURFACE AND COATINGS TECHNOLOGY》 * |
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Application publication date: 20220412 |