CN113005388A - Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof - Google Patents
Super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and preparation method thereof Download PDFInfo
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Abstract
本发明公开了超疏水耐蚀防污铝基非晶涂层及其制备方法，所述方法包括以下步骤：S1、基材表面预处理，S2、铝基非晶涂层的制备，S3、涂层表面化学刻蚀，S4、低表面能物质修饰。本发明所述方法具有以下优势：(1)工艺简单，效率高，适合现场施工，成本低，可在非平面复杂结构基底上大面积制备；(2)涂层氧化物含量低、成分均匀、结构致密，孔隙率<2％，与基底结合良好，其非晶含量>80vol.％,具备优异的耐磨耐蚀性能；(3)接触角>150°，滚动角<10°，具备良好的疏水性，表现出优异的防水、自清洁，以及耐腐蚀性能，且兼备非晶涂层的高耐磨性；(4)可应用于多种工业零部件外表面和管道内壁等需要自清洁、耐腐蚀、抗结冰和节能流体输送等各种场合。
The invention discloses a super-hydrophobic corrosion-resistant and anti-fouling aluminum-based amorphous coating and a preparation method thereof. The method comprises the following steps: S1, surface pretreatment of a substrate, S2, preparation of the aluminum-based amorphous coating, S3, coating Layer surface chemical etching, S4, low surface energy material modification. The method of the invention has the following advantages: (1) the process is simple, the efficiency is high, it is suitable for on-site construction, the cost is low, and it can be prepared in a large area on a non-planar complex structure substrate; (2) the coating oxide content is low, the composition is uniform, Dense structure, porosity <2%, good bonding with the substrate, its amorphous content >80vol.%, with excellent wear and corrosion resistance; (3) Contact angle >150°, rolling angle <10°, with good It is hydrophobic, showing excellent waterproof, self-cleaning, and corrosion resistance, and has the high wear resistance of amorphous coatings; (4) It can be applied to the outer surface of various industrial parts and the inner wall of pipes that require self-cleaning, Corrosion-resistant, anti-icing and energy-efficient fluid transfer applications.
Description
Technical Field
The invention belongs to the field of material surface engineering, relates to a preparation technology of a super-hydrophobic coating on the surface of a key part of ocean engineering equipment, and particularly relates to a super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and a preparation method thereof.
Background
The marine equipment is used in a severe marine environment for a long time, and corrosion damage, abrasion failure and biological fouling of marine engineering materials are inevitable, so that huge economic loss is brought. The failure problem of ocean engineering materials becomes one of the factors restricting the development of ocean engineering technology and equipment, and causes high attention of governments and ocean industry in all countries in the world. Therefore, it is necessary to develop high-performance materials and improve surface protection technologies to ensure long-term safety service of marine engineering equipment.
The aluminum-based amorphous alloy has long-range disordered atomic structure, no crystal defects such as crystal boundary, segregation and the like, has low cost, small density, high specific strength and excellent corrosion resistance and wear resistance, and is a new material with great engineering application. But the three-dimensional block preparation technology has no major breakthrough because most of the three-dimensional block preparation technology exists only in the forms of powder, thin strip, millimeter rod and the like due to the harsh preparation process such as high vacuum and the like and room temperature brittleness. Advanced thermal spray techniques feature rapid cooling of the solidified material (10)5～108K/s) provides technical support for depositing the amorphous coating. The high-speed electric arc spraying technology adopts the metal powder core wire containing amorphous forming elements as a raw material, has simple equipment, high efficiency and low cost, is suitable for site in-situ large-area construction, and provides new opportunity and advanced technical support for corrosion protection of metal components.
In recent years, super-hydrophobic coatings of bionic lotus leaf surface micro-nano structures are developed successively, the static water contact angle of the super-hydrophobic coatings is larger than 150 degrees, the rolling angle of the super-hydrophobic coatings is smaller than 10 degrees, the super-hydrophobic coatings have the characteristics of water repellency, self-cleaning and the like, and have potential engineering application values in the aspects of corrosion resistance, water resistance, pollution prevention, drag reduction, fog prevention, ice prevention and the like. Superhydrophobic coatings are a promising technique for improving the corrosion resistance of metals because they block the metal surface from contact with water and ambient humidity. Superhydrophobic technology is also very important for many industrial applications and can solve the long-standing corrosion problem of metals and their alloys. Based on the excellent performance and lower surface energy of the aluminum-based amorphous alloy and the application of the super-hydrophobic coating layer in improving the metal corrosion resistance, the research and development of the super-hydrophobic aluminum-based amorphous alloy coating layer with high corrosion resistance have great significance in the fields of ocean engineering and military.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the problem of corrosion and abrasion failure of key parts of marine equipment in a severe marine environment, the invention provides a super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating and a preparation method thereof in order to further improve the corrosion-resistant antifouling performance of the aluminum-based amorphous coating. The method can prepare the super-hydrophobic surface on a large area of various metal workpiece substrates with complex structures, and has the advantages of simple manufacturing process, high preparation efficiency, suitability for field construction, low cost and the like. The hydrophobic surface prepared by the method not only has excellent super-hydrophobic performance and self-cleaning effect, but also has the wear-resisting and corrosion-resisting properties of the amorphous coating, and has a certain anti-icing function.
The technical scheme is as follows: the preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating comprises the following steps:
s1 pretreatment of substrate surface
The surface of a sample is polished by sand paper to remove oxides, the polished sample is ultrasonically cleaned for 5-15min by absolute ethyl alcohol and acetone respectively to remove surface particle impurities and oil stains, and after natural air drying, in order to ensure good bonding force between a coating and a base material, the surface of the sample is subjected to sand blasting by adopting a sand blasting process to improve the surface roughness of the sample;
s2 preparation of aluminum-based amorphous coating
Carrying out multi-pass spraying on the surface of the pretreated base material by utilizing a high-speed electric arc spraying technology to prepare the aluminum-based amorphous coating with the micron-sized coarse structure;
s3, coating surface chemical etching
Etching the aluminum-based amorphous coating prepared in the step S2 in an alkaline solution, establishing a micro-nano composite rough structure on the surface of the coating, activating the surface of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 5-15min, removing surface residual liquid and etching products, and naturally drying the coating;
s4 modification of Low surface energy substance
And modifying the coating treated by the S3 in a low surface energy substance, taking out and drying the modified coating, and cooling the modified coating to room temperature to obtain the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating.
Preferably, the parameters of the sand blasting process in the step S1 are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
Preferably, in S2, the substrate is made of pure aluminum coating powder core, the powder core is made of FeSi powder, alloy powder which contains 75 wt.% of Si, Fe powder and has the purity of 99.9 wt.%, the filling rate of the powder core is 40-43%, and the diameter of the powder core wire is 2 mm.
Preferably, the spraying process parameters in S2 are: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
Preferably, the alkali solution in S3 is a sodium hydroxide aqueous solution with the concentration of 0.01-1mol/L, the etching time is 30S-6min, and the etching is carried out in a static water state or an ultrasonic bath environment.
Preferably, the low surface energy substance in S4 is trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution with concentration of 1 wt.% to 5 wt.%, modification temperature is room temperature to 80 ℃, and modification time is 2H to 12H; the drying temperature is room temperature-120 deg.C, and the drying time is 30min-2 h.
The super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating prepared by any one of the methods.
The principle of the method of the invention is that: the corrosion resistance of the coating is greatly improved by utilizing the synergistic effect of the amorphous alloy with excellent corrosion resistance and the super-hydrophobic surface structure with low adhesion and excellent self-cleaning property. Compared with crystalline materials, the unique atomic structure of the amorphous alloy endows the amorphous alloy with more uniform structure, no crystal defects such as crystal boundary, segregation and the like, has the properties of high strength, high hardness, excellent corrosion resistance and the like, and is a metal material with the highest strength and the best corrosion resistance which is discovered at present; therefore, the aluminum-based amorphous coating with high corrosion resistance can be prepared on the substrate by using a low-cost and high-efficiency electric arc spraying process. In order to further improve the corrosion resistance of the aluminum-based amorphous coating, a chemical method is utilized to construct a micro-nano structure on the surface of the aluminum-based amorphous coating and reduce the surface free energy to obtain the super-hydrophobic surface coating with excellent self-cleaning property. The corrosion resistance of the coating can be obviously improved through the synergistic effect of the self-cleaning super-hydrophobic structure and the amorphous structure, and meanwhile, the electric arc spraying technology and the chemical surface treatment process adopted by the invention are simple, high in efficiency and suitable for field construction, and can be used for large-area preparation on a non-planar complex structure substrate, such as parts with complex structures, such as right angles, curved surfaces and the like.
Has the advantages that:
(1) the method has the advantages of simple process, high efficiency, suitability for field construction and low cost, and can be used for large-area preparation on a non-planar complex structure substrate;
(2) the aluminum-based amorphous coating prepared by adopting the high-speed electric arc spraying technology has the advantages of low oxide content, uniform components, compact structure, porosity of less than 2%, good combination with a substrate, amorphous content of more than 80 vol%, and excellent wear resistance and corrosion resistance;
(3) the contact angle of the super-hydrophobic aluminum-based amorphous coating prepared by the method is more than 150 degrees, the rolling angle is less than 10 degrees, the super-hydrophobic aluminum-based amorphous coating has good hydrophobicity, excellent waterproof, self-cleaning and corrosion resistance performances are shown, and the super-hydrophobic aluminum-based amorphous coating has high wear resistance of the amorphous coating;
(4) the super-hydrophobic aluminum-based amorphous coating prepared by the invention can be applied to various occasions such as the outer surfaces of various industrial parts, the inner walls of pipelines and the like, which need self-cleaning, corrosion resistance, anti-icing, energy-saving fluid transportation and the like.
Drawings
FIG. 1 is a sectional overview and XRD pattern of the Al-based amorphous coating prepared in example 1, wherein (a) is the sectional overview and (b) is the XRD pattern;
FIG. 2 is the static contact angle of the Al-based amorphous coating at different etching times in example 1;
FIG. 3 is the surface topography and a partial enlarged view of the as-sprayed aluminum-based amorphous coating and the etched surface topography and partial enlarged view thereof in example 1, wherein (a) is the surface topography of the as-sprayed aluminum-based amorphous coating with a contact angle of 134.8 °, (b) is the partial enlarged view of (a), (c) is the surface topography of the as-sprayed aluminum-based amorphous coating with a contact angle of 134.8 °, (d) is the partial enlarged view of (c);
FIG. 4 is a surface water repellency test of a superhydrophobic aluminum-based amorphous coating prepared in example 2, wherein (a) is the coating surface in a fully immersed state, (b) is a coating surface jet experiment, and (c) is a water drop bounce experiment;
FIG. 5 is a surface self-cleaning ability test of the super-hydrophobic aluminum-based amorphous coating prepared in example 3;
fig. 6 is an electrochemical corrosion behavior test of the superhydrophobic aluminum-based amorphous coating prepared in example 4.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and substance of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
Example 1:
the preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating specifically comprises the following steps:
(1) pretreatment of substrate surfaces
And (3) polishing the surface of the sample by using sand paper to remove oxides, and ultrasonically cleaning the polished sample by using absolute ethyl alcohol and acetone for 10min respectively to remove surface particle impurities and oil stains. After natural air drying, in order to ensure that the coating and the base material have good binding force, the surface of the sample is subjected to sand blasting treatment by adopting a sand blasting process so as to improve the surface roughness, wherein the sand blasting process parameters are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
(2) Preparation of aluminum-based amorphous coating
The aluminum-based amorphous coating is prepared on the surface of the coarsened substrate by utilizing a high-speed electric arc spraying technology, the powder core wire for spraying is prepared by coating a powder core with a pure aluminum sheath, the powder core is alloy powder formed by mixing FeSi (75 wt.% Si) powder and Fe (99.9 wt.%), the filling rate of the powder core is 40-43%, and the diameter of the powder core wire is 2 mm. The spraying process parameters are as follows: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
(3) Chemical etching of coating surfaces
Etching the aluminum-based amorphous coating in a static sodium hydroxide aqueous solution with the concentration of 1mol/L for 30s-6min, establishing a micro-nano composite rough structure on the surface of the coating, simultaneously improving the surface activity of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 10min, removing surface residual liquid and etching products, and naturally drying the coating.
(4) Low surface energy substance modification
And (3) soaking the etched coating in a 1 wt.% trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution at room temperature for 12H, taking out, and air-drying at room temperature for 2H to obtain the super-hydrophobic aluminum-based amorphous coating.
FIG. 1(a) shows the cross-sectional morphology of the coating, the coating thickness is 654 μm, and the porosity is 1.4%. Fig. 1(b) is a coating XRD pattern, and it can be seen that there is a broad diffuse scattering peak between 30 ° and 50 ° 2 θ, representing typical amorphous characteristics, and the amorphous content is calculated to be 80.4 ± 4.6 vol.%. FIG. 2 shows the spray-coated coating and the static water contact angle thereof after etching in 1mol/L sodium hydroxide aqueous solution for 30s-6min and modification, the spray-coated coating contact angle is 134.8 degrees, the spray-coated coating contact angle reaches 140.8 degrees after modification by low surface energy substances, and the spray-coated coating belongs to the hydrophobic category. When the surface of the coating is etched by the alkali solution for 30s, the contact angle of the coating rises to 151.9 degrees, the super-hydrophobic range is reached, the contact angle is increased firstly and then slightly reduced along with the prolonging of the etching time, and the maximum value is reached after 4min of etching and is 157.4 degrees. FIG. 3 is the surface morphology of the as-sprayed coating and after 4min etching with an aqueous alkali, it can be seen that the metal melted by the arc is atomized into micro-droplets under the action of high-pressure gas and is accelerated to be sprayed onto the substrate to be flattened, and the edge shows a micro-convex characteristic due to the splashing effect to form a micro-scale coarse structure; after chemical etching, the surface roughness of the coating is increased, and a micro-nano multilevel rough structure is formed.
Example 2:
the preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating specifically comprises the following steps:
(1) pretreatment of substrate surfaces
And (3) polishing the surface of the sample by using sand paper to remove oxides, and ultrasonically cleaning the polished sample by using absolute ethyl alcohol and acetone for 10min respectively to remove surface particle impurities and oil stains. After natural air drying, in order to ensure that the coating and the base material have good binding force, the surface of the sample is subjected to sand blasting treatment by adopting a sand blasting process so as to improve the surface roughness, wherein the sand blasting process parameters are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
(2) Preparation of aluminum-based amorphous coating
The aluminum-based amorphous coating is prepared on the surface of the coarsened substrate by utilizing a high-speed electric arc spraying technology, the powder core wire for spraying is prepared by coating a powder core with a pure aluminum sheath, the powder core is alloy powder formed by mixing FeSi (75 wt.% Si) powder and Fe (99.9 wt.%), the filling rate of the powder core is 40-43%, and the diameter of the powder core wire is 2 mm. The spraying process parameters are as follows: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
(3) Chemical etching of coating surfaces
Etching the aluminum-based amorphous coating in a sodium hydroxide aqueous solution with the concentration of 1mol/L for 30s-6min, establishing a micro-nano composite rough structure on the surface of the coating, simultaneously improving the surface activity of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 10min, removing surface residual liquid and etching products, and naturally drying the coating.
(4) Low surface energy substance modification
And (3) soaking the etched coating in a 1 wt.% trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution at the temperature of 80 ℃ for 2H, taking out, and air-drying at room temperature for 2H to obtain the super-hydrophobic aluminum-based amorphous coating.
As can be seen from fig. 4, in case 2, the contact angle of the aluminum-based amorphous coating after chemical etching for 30s and modification reaches 152.2 °, and fig. (a) shows that the coating surface is in a fully immersed state, and the coating surface shows a reflective characteristic due to the formation of air pockets between the aqueous solution and the hydrophobic layer. The figure (b) is a jet flow experiment on the surface of the coating, and can be seen that the surface of the coating shows good water repellency and has higher stability under high-speed water flow. The figure (c) is a water drop bounce experiment, and it can be seen that the liquid drops are separated from the coating surface after multi-stage bounce, and the excellent waterproof performance is shown.
Example 3:
the preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating specifically comprises the following steps:
(1) pretreatment of substrate surfaces
And (3) polishing the surface of the sample by using sand paper to remove oxides, and ultrasonically cleaning the polished sample by using absolute ethyl alcohol and acetone for 10min respectively to remove surface particle impurities and oil stains. After natural air drying, in order to ensure that the coating and the base material have good binding force, the surface of the sample is subjected to sand blasting treatment by adopting a sand blasting process so as to improve the surface roughness, wherein the sand blasting process parameters are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
(2) Preparation of aluminum-based amorphous coating
The aluminum-based amorphous coating is prepared on the surface of the coarsened substrate by utilizing a high-speed electric arc spraying technology, the powder core wire for spraying is prepared by coating a powder core with a pure aluminum sheath, the powder core is alloy powder formed by mixing FeSi (75 wt.% Si) powder and Fe (99.9 wt.%), the filling rate of the powder core is 40-43%, and the diameter of the powder core wire is 2 mm. The spraying process parameters are as follows: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
(3) Chemical etching of coating surfaces
In ultrasonic bath, etching the aluminum-based amorphous coating in a static sodium hydroxide aqueous solution with the concentration of 0.01mol/L for 30s-6min, establishing a micro-nano composite rough structure on the surface of the coating, simultaneously improving the surface activity of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 10min, removing surface residual liquid and etching products, and naturally airing the coating.
(4) Low surface energy substance modification
Soaking the etched coating in 5 wt.% trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution for 6H at room temperature, taking out, drying at 120 ℃ for 30min, and cooling to room temperature to obtain the super-hydrophobic aluminum-based amorphous coating.
As can be seen from FIG. 5, the contact angle of the aluminum-based amorphous coating chemically etched for 30s and modified in example 3 reaches 151.2 degrees, and the aluminum-based amorphous coating has good dirt-removing ability and excellent self-cleaning property.
Example 4:
the preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating specifically comprises the following steps:
(1) pretreatment of substrate surfaces
And (3) polishing the surface of the sample by using sand paper to remove oxides, and ultrasonically cleaning the polished sample by using absolute ethyl alcohol and acetone for 10min respectively to remove surface particle impurities and oil stains. After natural air drying, in order to ensure that the coating and the base material have good binding force, the surface of the sample is subjected to sand blasting treatment by adopting a sand blasting process so as to improve the surface roughness, wherein the sand blasting process parameters are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
(2) Preparation of aluminum-based amorphous coating
The aluminum-based amorphous coating is prepared on the surface of the coarsened substrate by utilizing a high-speed electric arc spraying technology, the powder core wire for spraying is prepared by coating a powder core with a pure aluminum sheath, the powder core is alloy powder formed by mixing FeSi (75 wt.% Si) powder and Fe (99.9 wt.%), the filling rate of the powder core is 40-43%, and the diameter of the powder core wire is 2 mm. The spraying process parameters are as follows: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
(3) Chemical etching of coating surfaces
In ultrasonic bath, etching the aluminum-based amorphous coating in a static sodium hydroxide aqueous solution with the concentration of 0.01mol/L for 30s-6min, establishing a micro-nano composite rough structure on the surface of the coating, simultaneously improving the surface activity of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 10min, removing surface residual liquid and etching products, and naturally airing the coating.
(4) Low surface energy substance modification
And (2) soaking the etched coating in a 1 wt.% trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution at the temperature of 80 ℃ for 2H, taking out, drying at the temperature of 120 ℃ for 30min, and cooling to room temperature to obtain the super-hydrophobic aluminum-based amorphous coating.
As can be seen from fig. 6, in case 4, the contact angle of the aluminum-based amorphous coating after being chemically etched for 30s and modified reaches 154.6 °, and after being soaked in a 3.5 wt.% NaCl solution for 1h, the self-corrosion potential and the self-corrosion current density of the as-sprayed coating are respectively as follows: -0.750V and 7.20X 10-7A/cm2(ii) a The self-corrosion potential and the self-corrosion current density of the super-hydrophobic aluminum-based amorphous coating are respectively as follows: -0.608V and 1.33X 10-8A/cm2This shows that the super-hydrophobic aluminum-based amorphous coating has more excellent corrosion resistance.
Claims (7)
1. The preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating is characterized by comprising the following steps of:
s1 pretreatment of substrate surface
Polishing the surface of a base material by using sand paper, then respectively ultrasonically cleaning the surface of the base material for 5-15min by using absolute ethyl alcohol and acetone, naturally drying the surface of the base material in the air, and then performing sand blasting treatment on the surface of the sample by using a sand blasting process;
s2 preparation of aluminum-based amorphous coating
Carrying out multi-pass spraying on the surface of the pretreated base material by utilizing a high-speed electric arc spraying technology to prepare the aluminum-based amorphous coating with the micron-sized coarse structure;
s3, coating surface chemical etching
Etching the aluminum-based amorphous coating prepared in the step S2 in an alkaline solution, establishing a micro-nano composite rough structure on the surface of the coating, activating the surface of the coating, taking out the coating, ultrasonically cleaning the coating in absolute ethyl alcohol for 5-15min, removing surface residual liquid and etching products, and naturally drying the coating;
s4 modification of Low surface energy substance
And modifying the coating treated by the S3 in a low surface energy substance, taking out and drying the modified coating, and cooling the modified coating to room temperature to obtain the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating.
2. The preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating according to claim 1, wherein the sand blasting process parameters in S1 are as follows: the compressed air pressure is 0.7MPa, the relative distance is 100mm, the angle is 70-90 degrees, and the granularity of the white corundum sand for sand blasting is 20 meshes.
3. The method for preparing the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating according to claim 1, wherein the substrate in S2 is made of pure aluminum sheath coated powder core, the powder core is made of FeSi powder, alloy powder containing 75 wt.% of Si, Fe powder and 99.9 wt.% of Fe powder, the powder core filling rate is 40-43%, and the diameter of the powder core wire is 2 mm.
4. The preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating according to claim 1, wherein the spraying process parameters in S2 are as follows: spraying voltage is 34V, spraying current is 150A, compressed air pressure is 0.7MPa, and relative distance is 200 mm.
5. The preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating according to claim 1, wherein the alkali solution in S3 is a sodium hydroxide aqueous solution with the concentration of 0.01-1mol/L, the etching time is 30S-6min, and the etching is carried out in a static water state or an ultrasonic bath environment.
6. The preparation method of the super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating according to claim 1, wherein the low surface energy substance in S4 is trimethoxy (1H,1H,2H, 2H-heptadecafluorodecyl) silane-ethanol solution with the concentration of 1 wt.% to 5 wt.%, the modification temperature is between room temperature and 80 ℃, and the modification time is between 2H and 12H; the drying temperature is room temperature-120 deg.C, and the drying time is 30min-2 h.
7. The super-hydrophobic corrosion-resistant antifouling aluminum-based amorphous coating prepared by the method of any one of claims 1 to 6.
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