CN113802082B - High-hardness corrosion-resistant high-entropy ceramic coating for charging pile and preparation method thereof - Google Patents
High-hardness corrosion-resistant high-entropy ceramic coating for charging pile and preparation method thereof Download PDFInfo
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- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
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Abstract
The invention discloses a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile and a preparation method thereof. (1) Soaking a charging pile metal shell with acetone and deionized water respectively to remove surface stains; (2) Drying the cleaned charging pile metal shell; (3) Performing surface sand blasting on the dried charging pile metal shell to roughen the surface of the shell; (4) Ultrasonically cleaning the charging pile metal shell with roughened surface by using ethanol; (5) Naturally drying the cleaned charging pile metal shell in a dust-free environment; (6) Cold spraying a Zn alloy layer with the thickness of 0.05-0.1mm on the surface of the roughened shell at low pressure; (7) CrO and Al are mixed 2 O 3 And carrying out high-energy ball milling and granulating on the TiO ceramic particles according to a volume ratio of 1:0.35-1 to obtain composite powder with the particle size of 20-45 mu m. Fill the high entropy ceramic coating that electric pile was used and have high rigidity and outstanding corrosion-resistant barrier propterty concurrently. Compared with the traditional coating, the coating has excellent two-stage salt spray corrosion resistance protection, and simultaneously has the surface hardness as high as 20GPa, and has good anti-collision performance.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a high-hardness, corrosion-resistant and high-entropy ceramic coating for a charging pile and a preparation method thereof.
Background
With the continuous development of science and technology, the amount of new energy automobiles in China is continuously increased, and the charging pile also becomes necessary corollary equipment. At present, fill electric pile mainly adopts the metal material, and many install and use in the open air, receive ultraviolet ray and rainwater erosion for a long time, the surface is corroded by the rust ization easily. Particularly, the salt fog concentration in coastal cities is high, so that the device is easy to corrode and perforate, the service life is influenced, and even the operation safety of equipment is threatened. In addition, fill electric pile outer wall and also can receive the unexpected striking of car, cause surface deformation or wearing and tearing. Therefore, the development of a high-hardness and corrosion-resistant coating for charging pile housings is an urgent technical problem to be solved. The high-hardness corrosion-resistant ceramic coating is sprayed on the charging pile shell, so that the metal shell can be effectively protected from rusting and corrosion, and the anti-collision capacity is improved. As a novel two-dimensional sheet material, the high-entropy ceramic coating has excellent corrosion resistance and wear resistance, and provides an innovative idea for the development of high-hardness corrosion-resistant coatings.
Chinese patent CN 112375460A discloses a graphene high-heat-dissipation anticorrosive coating for charging piles and a preparation method thereof, wherein the shielding property of a lamellar graphene material is combined with an anticorrosive filler, the graphene material is modified to ensure the effective lamellar distribution of the graphene material, the transmission path of corrosive media such as water and chloride ions is greatly increased, and the corrosion protection performance of the coating is ensured. However, the paint film disclosed by the patent has low adhesion with a base material and limited anticorrosion effect, generates peculiar smell in the spraying process, has large pollution to the surrounding environment, has low hardness and is easy to scratch.
Disclosure of Invention
The invention aims to solve the problem of potential safety hazard caused by corrosion and perforation of equipment shells due to the fact that the existing charging pile is subjected to salt spray erosion, ultraviolet irradiation and other factors all year round in coastal cities, and provides a high-hardness corrosion-resistant high-entropy ceramic coating which is simple in preparation process, high in production efficiency and capable of being sprayed on the outer wall of the charging pile. The high-entropy ceramic coating prepared by the method has high hardness, ultraviolet irradiation resistance and obvious corrosion resistance in a salt spray environment.
The invention is realized by the following technical scheme:
a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile and a preparation method thereof are characterized by comprising the following steps:
(1) Cleaning stains: soaking a charging pile metal shell with acetone and deionized water respectively to remove surface stains;
(2) Drying: drying the cleaned charging pile metal shell in an oven;
(3) Surface sand blasting: performing surface sand blasting on the dried charging pile metal shell to roughen the surface of the shell;
(4) Cleaning impurities: cleaning the charging pile metal shell with roughened surface by using ethanol ultrasonic waves;
(5) And (3) natural air drying: naturally drying the cleaned charging pile metal shell in a dust-free environment;
(6) Spraying a Zn transition layer: performing low-pressure cold spraying on a Zn layer on the roughened shell surface;
(7) And (3) granulating the ceramic composite powder: crO and Al are mixed 2 O 3 Carrying out 2-level gradient high-energy ball milling and granulating on the TiO ceramic particles to form spherical composite powder;
(8) Thermal spraying of a high-entropy ceramic coating: and thermally spraying the composite powder on the Zn transition layer by adopting supersonic flame to obtain the high-hardness corrosion-resistant high-entropy ceramic coating.
(9) Hole sealing treatment: and heating the charging pile metal shell, and then impregnating the charging pile metal shell in an epoxy resin solution to perform coating hole sealing.
Further, the soaking time with acetone and deionized water in the step (1) is 24 hours.
Further, the drying temperature in the step (2) is 80-100 ℃.
Further, the surface sand blasting in the step (3) adopts carborundum, the sand blasting distance is 80-100mm, and the surface roughness after the sand blasting is 3-4 mu m.
Further, the ultrasonic cleaning time in the step (4) is 15-30 minutes, and the ultrasonic frequency is 80-120Hz.
Further, the air cleanliness Class of the dustless environment in step (5) is ISO Class3.
Further, the low-pressure cold spraying pressure in the step (6) is 10 atmospheric pressures, the airflow preheating temperature is 80-150 ℃, the Zn powder is spherical, the particle size is 10-30um, the Zn powder speed is 500-600m/s, and the Zn coating thickness is 0.05-0.1mm.
Further, crO and Al in the step (7) 2 O 3 The TiO ceramic particles are prepared according to the volume ratio of 1:0.35-1, and the first-stage high-energy ball-milling medium is ZrO 2 The ball diameter of the grinding ball is 6mm, the ball-material ratio is 25, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 200 r/min. The second-stage high-energy ball milling medium is ZrO 2 Grinding balls, wherein the diameter of the grinding balls is 2mm, the ball-to-material ratio is 10-15, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 300r/min, so that spherical particles with the ceramic composite powder of 20-45um are obtained.
Further, the proportion of the supersonic flame thermal spraying propane to the oxygen gas in the step (8) is 2.
Further, the hole sealing treatment in the step (9) is carried out on the charging pile metal shell, the heating temperature is 100-150 ℃, and the soaking time is 2-4 hours.
The high-hardness, corrosion-resistant and high-entropy ceramic coating for the charging pile is characterized by being prepared by the preparation method. The preparation method of the high-entropy ceramic coating takes metal as a substrate, takes a Zn coating as a bonding layer between a high-entropy ceramic layer and the substrate, deposits the high-entropy ceramic coating on the Zn coating by a supersonic flame thermal spraying technology, and regulates the performance of the coating by controlling the content of each principal element of the high-entropy ceramic coating, wherein the hardness is up to 20GPa, the adhesion with the substrate is strong, and the preparation method has a remarkable inhibiting effect on the salt spray corrosivity. The corrosion resistance is mainly determined by two aspects, namely a high-entropy ceramic coating with a solid solution structure and a transition layer Zn coating. First, the high-entropy ceramic coating will be on Cl - The inhibition effect plays a first-stage anticorrosion protection role on the matrix, and the ceramic coating is damaged due to human or environmental factors in the service process of the charging pile, so that Cl is generated - Can permeate through the high-entropy ceramic coating through micropores or microcracks, and a transition layer Zn coating can play a second-level anticorrosion protection role, and plays a dual protection role in a charging pile matrix. In addition, the high-entropy ceramic coating with the solid solution structure is good in thermal stability, and the microstructure change of the high-entropy ceramic coating caused by long-time working heat aggregation of the charging pile can be avoided.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the high-hardness corrosion-resistant high-entropy ceramic coating for the charging pile and the preparation method thereof, the characteristics of good thermal stability and corrosion resistance of the high-entropy ceramic with a solid solution structure are utilized, the high-entropy ceramic layer and the substrate are firmly fixed together through the Zn coating, a double-layer corrosion coating structure is established, the problem that other coatings such as an antirust paint film and the like are poor in corrosion resistance is fundamentally solved, and the long-acting salt spray corrosion resistance of a charging pile shell is ensured.
(2) The invention provides a high-hardness corrosion-resistant high-entropy ceramic coating for charging piles and a preparation method thereof - Chemical reaction occurs, the hardness of the ceramic material is far higher than that of coatings of metal, organic matters and the like, and a superhard protective layer is built on the outer wall of the charging pile, so that the surface wear resistance and the anti-collision performance are improved.
(3) According to the high-hardness corrosion-resistant high-entropy ceramic coating for the charging pile and the preparation method thereof, the coating thermally sprayed by supersonic flame can form a porous structure, epoxy resin is impregnated through hole sealing treatment to form a composite coating combining inorganic and organic materials, and the coating has good toughness and impact resistance when being impacted by external force.
(4) The high-hardness corrosion-resistant high-entropy ceramic coating for the charging pile and the preparation method thereof have the advantages of simple process, high production efficiency, environmental friendliness and low environmental pollution, and overcome the defect of high environmental pollution caused by the adoption of an anticorrosive coating in the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an SEM image of a cross section of a Zn transition layer and a high-entropy ceramic coating layer prepared in example 3 of the present invention;
FIG. 2 is a graph showing the adhesion of coatings prepared in examples 1-3 of the present invention to a substrate;
FIG. 3 is a plot of potentiodynamic polarization for coatings prepared in examples 1-3 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile comprises the following steps:
(1) Cleaning stains: soaking a charging pile metal shell in acetone and deionized water for 24 hours respectively to remove surface stains;
(2) And (3) drying: drying the cleaned charging pile metal shell in an oven at 100 ℃;
(3) Surface sand blasting: and carrying out surface sand blasting on the dried charging pile metal shell by using emery, wherein the sand blasting distance is 100mm, and the surface roughness is 4 mu m after sand blasting.
(4) Cleaning impurities: and (3) ultrasonically cleaning the charging pile metal shell with roughened surface by using ethanol, wherein the cleaning time is 15 minutes, and the ultrasonic frequency is 100Hz.
(5) And (3) natural air drying: and carrying out air drying treatment on the cleaned charging pile metal shell in a dust-free workshop with the air cleanliness Class of ISO Class3.
(6) Spraying a Zn transition layer: and (3) carrying out low-pressure cold spraying on the surface of the roughened shell, wherein the spraying pressure is 10 atmospheres, the airflow preheating temperature is 150 ℃, the Zn powder is spherical, the particle size is 10-30 mu m, the speed of the Zn powder is 600m/s, and the thickness of the Zn coating is 0.1mm.
(7) And (3) ceramic composite powder granulation: mixing CrO and Al 2 O 3 And TiO ceramic particles are prepared according to the volume ratio of 1 2 The ball-milling device comprises a grinding ball, wherein the ball diameter of the grinding ball is 6mm, the ball-material ratio is 25, the ball-milling atmosphere is argon, a ball-milling additive is deionized water, and the ball-milling speed is 200 r/min. The second-stage high-energy ball milling medium is ZrO 2 Grinding balls, the diameter of the grinding balls is 2mm, the ball material ratio is 15The grinding atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 300r/min, so that spherical particles with the ceramic composite powder being 20-45 mu m are obtained.
(8) Thermal spraying of a high-entropy ceramic coating: and thermally spraying 20-45 mu m of spherical ceramic composite powder on the Zn transition layer by adopting supersonic flame, wherein the ratio of propane to oxygen is 2:3, the spraying distance is 240mm, the powder feeding amount is 50g/min, and the thickness of the obtained high-entropy ceramic coating is 0.3mm.
(9) Hole sealing treatment: and heating the charging pile metal shell to 150 ℃, and then impregnating the charging pile metal shell in an epoxy resin solution for 2 hours to carry out coating hole sealing.
Example 2
A preparation method of a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile comprises the following steps:
(1) Cleaning stains: soaking a charging pile metal shell in acetone and deionized water for 24 hours respectively to remove surface stains;
(2) Drying: drying the cleaned charging pile metal shell in an oven at 100 ℃;
(3) Surface sand blasting: and carrying out surface sand blasting on the dried charging pile metal shell by using emery, wherein the sand blasting distance is 100mm, and the surface roughness is 4 mu m after sand blasting.
(4) Cleaning impurities: and (3) ultrasonically cleaning the charging pile metal shell with roughened surface by using ethanol, wherein the cleaning time is 15 minutes, and the ultrasonic frequency is 100Hz.
(5) And (3) naturally drying: and carrying out air drying treatment on the cleaned charging pile metal shell in a dust-free workshop with the air cleanliness Class of ISO Class3.
(6) Spraying a Zn transition layer: and (3) carrying out low-pressure cold spraying on the surface of the roughened shell, wherein the spraying pressure is 10 atmospheres, the airflow preheating temperature is 150 ℃, the Zn powder is spherical, the particle size is 10-30 mu m, the speed of the Zn powder is 600m/s, and the thickness of the Zn coating is 0.1mm.
(7) And (3) ceramic composite powder granulation: mixing CrO and Al 2 O 3 And TiO ceramic particles are prepared according to the volume ratio of 1 2 Grinding ball with 6mm diameter and material/ball ratioThe ball milling speed is 200r/min, the ball milling atmosphere is argon, the ball milling additive is deionized water, and the ball milling speed is 25. The second-stage high-energy ball milling medium is ZrO 2 Grinding balls, the diameter of each grinding ball is 2mm, the ball-to-material ratio is 15, the ball-milling atmosphere is argon gas, the ball-milling additive is deionized water, the ball-milling speed is 300r/min, and the obtained ceramic composite powder is 20-45 mu m spherical particles.
(8) Thermal spraying of a high-entropy ceramic coating: and (2) thermally spraying 20-45 mu m spherical ceramic composite powder on the Zn transition layer by adopting supersonic flame, wherein the ratio of propane to oxygen is 2.
(9) Hole sealing treatment: and heating the charging pile metal shell to 150 ℃, and then impregnating the charging pile metal shell in an epoxy resin solution for 2 hours to carry out coating hole sealing.
Example 3
A preparation method of a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile comprises the following steps:
(1) Cleaning stains: soaking a charging pile metal shell in acetone and deionized water for 24 hours respectively to remove surface stains;
(2) Drying: drying the cleaned charging pile metal shell in an oven at 100 ℃;
(3) Surface sand blasting: and carrying out surface sand blasting on the dried charging pile metal shell by using emery, wherein the sand blasting distance is 100mm, and the surface roughness is 4 mu m after sand blasting.
(4) Cleaning impurities: and cleaning the charging pile metal shell with roughened surface by using ethanol ultrasonic waves for 15 minutes at the ultrasonic frequency of 100Hz.
(5) And (3) naturally drying: and carrying out air drying treatment on the cleaned charging pile metal shell in a dust-free workshop with the air cleanliness Class of ISO Class3.
(6) Spraying a Zn transition layer: and (3) carrying out low-pressure cold spraying on the surface of the roughened shell, wherein the spraying pressure is 10 atmospheres, the airflow preheating temperature is 150 ℃, the Zn powder is spherical, the particle size is 10-30 mu m, the Zn powder speed is 600m/s, and the thickness of the Zn coating is 0.1mm.
(7) Ceramic materialGranulating composite powder: crO and Al are mixed 2 O 3 And TiO ceramic particles are prepared according to the volume ratio of 1 2 The ball diameter of the grinding ball is 6mm, the ball-material ratio is 25, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 200 r/min. The second-stage high-energy ball milling medium is ZrO 2 Grinding balls, the ball diameter of which is 2mm, the ball-to-material ratio is 15, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, the ball-milling speed is 300r/min, and spherical particles with the particle size of 20-45 [ mu ] m of the ceramic composite powder are obtained.
(8) Thermal spraying of a high-entropy ceramic coating: and (2) thermally spraying spherical ceramic composite powder of 20-45 mu m on the Zn transition layer by adopting supersonic flame, wherein the ratio of propane to oxygen is 2.
(9) Hole sealing treatment: and heating the charging pile metal shell to 150 ℃, and then soaking the charging pile metal shell in an epoxy resin solution for 2 h to perform coating hole sealing.
And (3) testing: the cross sections of the high-entropy ceramic coatings prepared in the examples 1 to 3 are observed by adopting an SEM (scanning electron microscope), the hardness of the high-entropy ceramic coatings prepared in the examples 1 to 3 is tested by adopting a TI950 nano-indenter, and the adhesive force of the high-entropy ceramic coatings prepared in the examples 1 to 3 is tested by adopting a WS.2005 coating adhesive force automatic scratching instrument. The high-entropy ceramic coatings prepared in examples 1 to 3 were subjected to electrochemical tests using an electrochemical workstation of model LK 1100A. The test results are shown in table 1, and it is known that the high-entropy ceramic coating prepared in example 1 has good comprehensive properties.
| Average hardness (GPa) | Adhesion (N) | Electric potential (V) | |
| Example 1 | 20 | 70 | -0.80 |
| Example 2 | 18 | 25 | -0.78 |
| Example 3 | 17 | 45 | -0.60 |
From the test results of the above examples 1-3, it can be seen that the preparation method of the high-entropy ceramic coating prepared by the method of the present invention uses metal as a substrate, uses a Zn plating layer as a bonding layer between the high-entropy ceramic layer and the substrate, deposits the high-entropy ceramic coating on the Zn plating layer by the supersonic flame thermal spraying technology, and adjusts the performance of the coating by controlling the content of each principal element of the high-entropy ceramic coating, wherein the hardness is up to 20GPa, the adhesion with the substrate is strong, and the preparation method has a significant inhibition effect on the salt spray corrosivity. The corrosion resistance is mainly determined by two aspects, namely a high-entropy ceramic coating with a solid solution structure and a transition layer Zn coating. First, the high-entropy ceramic coating will be on Cl - Inhibition when Cl - The transition layer Zn coating can play a second-level anti-corrosion protection role by penetrating through the high-entropy ceramic coating through micropores or microcracks, and plays a role in protecting a charging pile matrix. In addition, the high-entropy ceramic coating of the solid solution structure has good thermal stability, and the microstructure change of the high-entropy ceramic coating caused by the heating of the charging pile heat collection shell can be avoided. But electric pile is filled in wide application indoor and outdoor eachThe outer wall surface has commercial application prospect.
The above-mentioned preferred embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention. Obvious changes or modifications from the technical scheme of the invention are still within the protection scope of the invention.
Claims (9)
1. A preparation method of a high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile is characterized by comprising the following steps:
(1) Cleaning stains: soaking a charging pile metal shell with acetone and deionized water respectively to remove surface stains;
(2) Drying: drying the cleaned charging pile metal shell in an oven;
(3) Surface sand blasting: performing surface sand blasting on the dried charging pile metal shell to roughen the surface of the shell;
(4) Cleaning impurities: cleaning the charging pile metal shell with roughened surface by using ethanol ultrasonic waves;
(5) And (3) naturally drying: naturally drying the cleaned charging pile metal shell in a dust-free environment;
(6) Spraying a Zn transition layer: performing low-pressure cold spraying on the roughened shell surface to form a Zn layer, wherein the thickness of the Zn layer is 0.05-0.1mm;
(7) And (3) ceramic composite powder granulation: mixing CrO and Al 2 O 3 Carrying out 2-level gradient high-energy ball milling and granulating on the TiO ceramic particles to form spherical composite powder;
the CrO and Al 2 O 3 The TiO ceramic particles are prepared according to the volume ratio of 1 2 Grinding balls, wherein the ball diameter of the grinding balls is 6mm, the ball-material ratio is 25, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 200r/min; the second-stage high-energy ball milling medium is ZrO 2 Grinding balls, wherein the ball diameter of the grinding balls is 2mm, the ball-to-material ratio is 10-15, the ball-milling atmosphere is argon, the ball-milling additive is deionized water, and the ball-milling speed is 300r/min, so that spherical particles with the particle size of 20-45 mu m are obtained;
(8) Thermal spraying of a high-entropy ceramic coating: thermally spraying the composite powder on the Zn transition layer by adopting supersonic flame to obtain a high-hardness corrosion-resistant high-entropy ceramic coating; the proportion of the supersonic flame thermal spraying propane to oxygen is 2-3, the spraying distance is 200-240mm, the powder feeding amount is 25-50g/min, and the thickness of the obtained high-entropy ceramic coating is 0.3-0.5mm;
(9) Hole sealing treatment: and heating the charging pile metal shell, and then impregnating the charging pile metal shell in an epoxy resin solution to perform coating hole sealing.
2. The preparation method of the high-hardness corrosion-resistant high-entropy ceramic coating for charging piles as claimed in claim 1, wherein in the step (1), the respective soaking time with acetone and deionized water is 24 hours.
3. The method for preparing a high-hardness corrosion-resistant high-entropy ceramic coating layer for charging piles as claimed in claim 1, wherein the drying temperature in the step (2) is 80-100 ℃.
4. The method for preparing the high-hardness corrosion-resistant high-entropy ceramic coating for charging piles as claimed in claim 1, wherein the surface sand blasting in step (3) is carried out by using carborundum, the sand blasting distance is 80-100mm, and the surface roughness after sand blasting is 3-4 μm.
5. The preparation method of the high-hardness corrosion-resistant high-entropy ceramic coating for charging piles as claimed in claim 1, wherein the ultrasonic cleaning time in step (4) is 15-30 minutes, and the ultrasonic frequency is 80-120Hz.
6. The method for preparing a high-hardness corrosion-resistant high-entropy ceramic coating layer for charging piles, according to claim 1, wherein the dust-free environment in the step (5) has an air cleanliness class of ISOClass3.
7. The preparation method of the high-hardness corrosion-resistant high-entropy ceramic coating for the charging pile according to claim 1, wherein the low-pressure cold spraying pressure in the step (6) is 10 atmospheres, the airflow preheating temperature is 80-150 ℃, the Zn powder is spherical, the particle size is 10-30 μm, and the cold spraying speed of the Zn powder is 500-600m/s.
8. The preparation method of the high-hardness corrosion-resistant high-entropy ceramic coating for the charging pile as claimed in claim 1, wherein the hole sealing treatment in step (9) is performed on the metal casing of the charging pile at a heating temperature of 100-150 ℃ for a soaking time of 2-4h.
9. A high-hardness corrosion-resistant high-entropy ceramic coating for a charging pile, which is characterized by being prepared by the preparation method of any one of claims 1 to 8.
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