CN114836725B - Inorganic super-hydrophobic anti-icing coating structure for low-temperature steel and preparation method thereof - Google Patents
Inorganic super-hydrophobic anti-icing coating structure for low-temperature steel and preparation method thereof Download PDFInfo
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- CN114836725B CN114836725B CN202210487053.5A CN202210487053A CN114836725B CN 114836725 B CN114836725 B CN 114836725B CN 202210487053 A CN202210487053 A CN 202210487053A CN 114836725 B CN114836725 B CN 114836725B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
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Abstract
The application discloses a preparation method of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure, which comprises the following steps: preparing a prismatic table array on the surface of low-temperature steel; depositing a rare earth oxide coating on the surface of the prismatic table array; high vacuum treatment of low temperature steel having the rare earth oxide coating. Also provides a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure. The preparation method for the low-temperature steel inorganic super-hydrophobic anti-icing coating structure provided by the application is simple in process, toxic and harmful chemical substances are not introduced in the whole preparation process, the purpose of developing an environment-friendly coating is completely met, the research field of the super-hydrophobic anti-icing coating is further widened, and the preparation method has a wide application prospect relative to the field of protecting the steel for polar vessels.
Description
Technical Field
The application relates to the technical field of metal material surface engineering, in particular to an inorganic super-hydrophobic anti-icing coating for low-temperature steel and a preparation method thereof.
Background
Polar sea ice is rapidly melting, and brings important opportunities for the development of polar shipping industry. The opening of the polar region channel can reduce the dependence of China on the conventional route, and meanwhile, the developed polar region resource can also provide strategic guarantee for the energy safety of China. The technology for developing the polar ship in the ice area is also a strategic problem for developing the polar area. Due to extremely low temperatures throughout the year, surface ice coating can affect the change of the draft and the gravity center of the ship, and the stability and the reliability of the superstructure structure are reduced. In addition, the surface ice coating can also influence the normal operation of equipment, and serious safety risks are brought. Traditional deicing modes include: mechanical deicing, electrothermal deicing, manual deicing and the like have the problems of high cost and low efficiency, and the ship self-protective coating is mostly damaged in the deicing process. In addition, chemical substances such as calcium chloride are sprayed to lower the freezing point, so that ice is melted, and the ice has a good deicing effect, but the damage to ships and water environments is not ignored. In particular, the polar water area is protected by international convention, and the use of chemical reagents for antifouling is not allowed, so that the application of the anti-icing technology in the polar water area is greatly limited.
Superhydrophobic surfaces have been widely used for surface anti-icing of materials because of their unique wettability properties. The superhydrophobic property of the coating enables the material surface to reduce the adhesion of liquid on its surface, while ice is more easily detached from its surface due to its smaller contact area after the liquid freezes. The traditional method for preparing the super-hydrophobic coating mainly adopts a two-step method of increasing the surface roughness and modifying the super-hydrophobic coating by using low-surface energy substances. Organic matters such as fluorosilanes and fatty acids on the surface of the alloy are harmful to the environment, and the organic matters have poor mechanical property, thermal stability and wear resistance and are not suitable for severe environments such as polar regions. The preparation of inorganic superhydrophobic coatings also currently has a number of problems, including the need for complex methods to prepare special surfaces, etc.
Disclosure of Invention
The application provides an inorganic super-hydrophobic anti-icing coating for low-temperature steel and a preparation method thereof, which aim to solve the problems that the existing organic super-hydrophobic material is unfavorable for environment and the preparation of the inorganic super-hydrophobic material is complex.
In one aspect, the embodiment of the application provides a preparation method of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure, which comprises the following steps:
preparing a prismatic table array on the surface of low-temperature steel;
depositing a rare earth oxide coating on the surface of the prismatic table array;
high vacuum treatment of low temperature steel having the rare earth oxide coating.
Further, the land array is prepared on the surface of the low-temperature steel by picosecond laser etching.
Further, picosecond laser etching is performed by designing vertical grid lines with a pitch of 20 μm to 80 μm.
Further, the laser diameter of the picosecond laser etching is 20 mu m, the picosecond laser power is 2.1W-4.5W, the picosecond laser frequency is 400 KHz-2000 KHz, and the picosecond laser running speed is 20 mm/s-300 mm/s.
Further, the rare earth oxide coating is deposited by magnetron sputtering of a rare earth oxide target in an inert gas environment.
Further, the rare earth oxide is cerium oxide, and the inert gas is argon.
Further, the vacuum degree of the magnetron sputtering is 5×10 -4 Pa～8×10 -4 Pa, the power of the magnetron sputtering is 100W, the air pressure of the magnetron sputtering is 2.4 Pa-3.6 Pa, and the time of the magnetron sputtering is 5 min-15 min.
Further, the high vacuum treatment has a vacuum degree of 7×10 -5 Pa～1×10 -4 Pa, the time of high vacuum treatment is 18-24 h.
Further, before preparing the prismatic table array on the surface of the low-temperature steel, cleaning the surface of the low-temperature steel and polishing the surface by sand paper.
On the other hand, the embodiment of the application provides a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure, which comprises a low-temperature steel surface with a prismatic table array; the surface of the prismatic table array is deposited with a rare earth oxide coating, and the rare earth oxide coating is subjected to high vacuum treatment.
Further, the rare earth oxide is cerium oxide.
The technical scheme of the application at least comprises the following advantages: the preparation method of the inorganic super-hydrophobic anti-icing coating structure for low-temperature steel, provided by the application, is simple in process, does not introduce toxic and harmful chemical substances in the whole preparation process, completely meets the aim of developing an environment-friendly coating, further widens the research field of the super-hydrophobic anti-icing coating, and has a wide application prospect relative to the field of protecting the steel for polar vessels; the inorganic super-hydrophobic anti-icing coating structure for the low-temperature steel has good anti-icing performance in a low-temperature environment, greatly prolongs the icing time of the low-temperature steel, is made of rare earth oxide, can provide better mechanical performance than a high-molecular material, and solves the problem that the application of the organic super-hydrophobic coating in severe environments such as polar regions is limited.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of steps of a preparation method of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure provided by an embodiment of the application;
FIG. 2a is a scanning electron microscope image with the magnification of 10 μm for preparing the low-temperature-steel-oriented inorganic super-hydrophobic anti-icing coating according to the first embodiment of the application;
FIG. 2b is a scanning electron microscope image with the magnification of 1 μm for preparing the low-temperature-steel-oriented inorganic super-hydrophobic anti-icing coating according to the first embodiment of the application;
FIG. 3 is a white light interference pattern of a low temperature steel-oriented inorganic superhydrophobic anti-icing coating structure according to an embodiment of the application;
fig. 4 is a schematic diagram of a shape of a water drop on the surface of an inorganic super-hydrophobic anti-icing coating structure when a water drop contact angle test is performed on the inorganic super-hydrophobic anti-icing coating structure facing to low temperature steel according to the first embodiment of the present application;
FIG. 5 is a diagram showing a comparison between a low-temperature-steel-oriented inorganic super-hydrophobic anti-icing coating structure and an original low-temperature steel surface water drop freezing process according to an embodiment of the present application;
fig. 6 is a graph showing the comparison of the ice adhesion strength between the inorganic super-hydrophobic anti-icing coating facing the low-temperature steel and the surface of the common low-temperature steel in the first embodiment and the second embodiment of the application.
Detailed Description
The following description of the embodiments of the present application will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a step flow chart of a preparation method of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure provided by an embodiment of the application. Referring to fig. 1, the preparation method of the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure includes:
s11, preparing a prismatic table array on the surface of low-temperature steel;
s12, depositing a rare earth oxide coating on the surface of the prismatic table array;
s13, treating the low-temperature steel with the rare earth oxide coating in high vacuum.
In the embodiment of the application, the prismatic table array is prepared on the surface of the low-temperature steel by picosecond laser etching, and the picosecond laser etching is performed by designing vertical grid lines, wherein the distance between the vertical grid lines is 20-80 mu m. The laser diameter of the picosecond laser etching is 20 mu m, the picosecond laser power is 2.1W-4.5W, the picosecond laser frequency is 400 KHz-2000 KHz, and the picosecond laser running speed is 20 mm/s-300 mm/s.
And depositing the rare earth oxide coating by magnetron sputtering of a rare earth oxide target in an inert gas environment. In the embodiment of the application, the rare earth oxide is cerium oxide, the inert gas is argon, the purity of the cerium oxide target material provided by the embodiment of the application is 99.99%, the specification is 50.8X3 mm, and the cerium oxide target material is bound with a 2mm copper backing target. Vacuum degree of magnetron sputtering is 5×10 -4 Pa～8×10 -4 Pa, the power of the magnetron sputtering is 100W, the air pressure of the magnetron sputtering is 2.4 Pa-3.6 Pa, and the time of the magnetron sputtering is 5 min-15 min.
In the embodiment of the application, the vacuum degree of the high vacuum treatment is 7×10 -5 Pa～1×10 -4 Pa, the time of high vacuum treatment is 18-24 h.
The embodiment of the application provides a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure, which comprises a low-temperature steel surface with a prismatic table array; the surface of the prismatic table array is deposited with a rare earth oxide coating, and the rare earth oxide coating is subjected to high vacuum treatment. In an embodiment of the present application, the rare earth oxide is cerium oxide.
Example 1
EH40 low-temperature steel is selected, a square sample with the thickness of 10 multiplied by 10mm is manufactured by a linear cutting mode, and the square sample is ultrasonically cleaned for 5min by absolute ethyl alcohol. And (5) polishing the cleaned samples with 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper and 1500# metallographic sand paper respectively.
The surface of the sample was subjected to picosecond laser etching, and the path of the picosecond laser etching was designed as a vertical grid line with a pitch of 20 μm. The laser etching process parameters are set to be 20 mu m in laser diameter, 2.32W in laser power, 1800KHz in laser frequency and 180mm/s in running speed.
Fixing the prepared sample on a base of a vacuum chamber of a JCP200 high-vacuum magnetron sputtering coating machine, and performing magnetron sputtering deposition on CeO under an argon atmosphere by using a cerium oxide target (purity is 99.99 percent) 2 Coating, magnetron sputtering process parameters are vacuum degree 7 multiplied by 10 -4 Pa, sputtering power 100W, sputtering air pressure 3.2Pa, and sputtering time 10min.
Then carrying out high vacuum treatment on the sample to obtain the inorganic super-hydrophobic anti-icing coating for low-temperature steel, wherein the high vacuum treatment parameter is that the vacuum degree is 9 multiplied by 10 -5 Pa, vacuum treatment time 22h.
FIG. 2a is a scanning electron microscope image with the magnification of 10 μm for preparing the low-temperature-steel-oriented inorganic super-hydrophobic anti-icing coating according to the first embodiment of the application; fig. 2b is a scanning electron microscope image with a magnification of 1 μm for preparing a low-temperature-steel-oriented inorganic super-hydrophobic anti-icing coating structure according to an embodiment of the application. The scanning electron microscope image is photographed by a Zeiss SUPRA55 field emission scanning electron microscope, and referring to FIG. 2a, the whole sample according to the first embodiment of the application is distributed in a periodic grid; referring to fig. 2b, the mesh exhibits irregular corrugations and a large number of nanoparticles, and the micro-nanostructure is CeO 2 The coating provides a rough surface, thus rendering the low temperature steel surface super-hydrophobic.
Fig. 3 is a white light interference diagram of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure according to an embodiment of the present application. The white light interferogram is taken by a ContourGT-1 white light interferometer. Referring to fig. 3, the surface of the sample with the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure provided by the embodiment of the application presents uniform and regular prismatic table distribution.
Fig. 4 is a schematic diagram of a shape of a water drop on the surface of an inorganic super-hydrophobic anti-icing coating structure when a water drop contact angle test is performed on the inorganic super-hydrophobic anti-icing coating structure for low-temperature steel according to the first embodiment of the present application. The water contact angle was measured by a contact angle meter by dropping 7 μl of deionized water onto the inorganic superhydrophobic coating. Referring to fig. 4, the surface of the inorganic super-hydrophobic anti-icing coating structure is nearly spherical, the contact angle is about 153 degrees, and the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure prepared by the embodiment of the application has a good super-hydrophobic effect.
Icing time test was performed in a low temperature test chamber (-10 ℃,30 RH%), 10 μl deionized water stained with methylene blue was dropped on the surface of the sample, and the morphological evolution and corresponding time during the water drop freezing process were recorded. The icing temperature test is to drop 10. Mu.L of deionized water dyed with methylene blue on the surface of a sample and put into a low-temperature box, the low-temperature box is gradually lowered from room temperature (25 ℃) at a speed of 5 ℃/min, and the complete icing temperature of the water drops is observed. The anti-icing test is carried out on the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure prepared in the embodiment of the application. Fig. 5 is a comparison chart of a low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure and an original low-temperature steel surface water drop freezing process according to an embodiment of the application. Referring to fig. 5, the ordinary EH40 low-temperature steel and the EH40 low-temperature steel having the inorganic super-hydrophobic anti-icing coating structure record the water drop state from-10 ℃ nucleation to complete icing at t=0s, t=75s, t=85s, t=260s, t=282 s, respectively, the water drop nucleation time of the ordinary low-temperature steel surface is 75s, the complete icing time is 85s, the nucleation time to complete icing is 10s, the water drop nucleation time of the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure provided by the embodiment of the application is 260s, the complete icing time is 282s, and the nucleation to complete icing time is 22 s. The icing temperature test shows that the icing temperature of water drops on the surface of the common low-temperature steel is minus 19.8 ℃, and the icing temperature of water drops on the surface of the inorganic super-hydrophobic anti-icing coating structure for the low-temperature steel provided by the embodiment of the application is minus 27.8 ℃, which is obviously lower than that of the original low-temperature steel. The reason for the obvious difference is that the superhydrophobic characteristic of the coating structure provided by the first embodiment of the application can form a water-air-solid interface on the surface of the coating based on the Cassie model, so that the contact area between water drops and the coating is reduced, the nucleation and growth of the water drops are effectively prevented, and the icing time of the water drops is delayed. In addition, high contact angles represent a large free energy barrier that water droplets should overcome for nucleation and growth, and icing is difficult. Therefore, the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating structure prepared by the embodiment of the application shows good anti-icing performance at low temperature by comprehensive anti-icing test.
Example two
EH40 low-temperature steel is selected, a square sample with the thickness of 10 multiplied by 10mm is manufactured by a linear cutting mode, and the square sample is ultrasonically cleaned for 5min by absolute ethyl alcohol. And (5) polishing the cleaned samples with 180# metallographic sand paper, 400# metallographic sand paper, 800# metallographic sand paper and 1500# metallographic sand paper respectively.
The surface of the sample was subjected to picosecond laser etching, and the path of the picosecond laser etching was designed as vertical grid lines with a pitch of 30 μm. The laser etching process parameters are set to be 20 mu m in laser diameter, 2.26W in laser power, 2000KHz in laser frequency and 200mm/s in running speed.
Fixing the prepared sample on a base of a vacuum chamber of a JCP200 high-vacuum magnetron sputtering coating machine, and performing magnetron sputtering deposition on CeO under an argon atmosphere by using a cerium oxide target (purity is 99.99 percent) 2 Coating, magnetron sputtering process parameters are vacuum degree 8 multiplied by 10 -4 Pa, sputtering power 100W, sputtering air pressure 3.1Pa, and sputtering time 8min.
Then carrying out high vacuum treatment to obtain the inorganic super-hydrophobic anti-icing coating for low-temperature steel, wherein the high vacuum treatment parameter is that the vacuum degree is 9 multiplied by 10 -5 Pa, vacuum treatment time 20h.
With reference to the first embodiment provided by the application, a drop contact angle test is performed on the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating prepared in the second embodiment, wherein the contact angle is about 151 degrees. And (3) carrying out an anti-icing test on the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating prepared in the second embodiment. The water drop nucleation time of the inorganic super-hydrophobic anti-icing coating surface facing the low-temperature steel in the second embodiment is 162s, the time from complete icing is 177s, and the time from nucleation to complete icing is 15s, so that the method has obvious time extension compared with the common low-temperature steel. Freezing temperature tests show that the freezing temperature of water drops on the surface of the inorganic super-hydrophobic anti-icing coating for low-temperature steel prepared in the second embodiment is-24.8 ℃, and is obviously lower than that of common low-temperature steel. Therefore, the low-temperature steel-oriented inorganic super-hydrophobic anti-icing coating prepared in the embodiment shows good anti-icing performance at low temperature by comprehensive anti-icing test.
Fig. 6 is a graph showing the comparison of the ice adhesion strength between the inorganic super-hydrophobic anti-icing coating facing the low-temperature steel and the surface of the common low-temperature steel in the first embodiment and the second embodiment of the application. The ice adhesion strength test is to drop 10ml deionized water into a self-made hollow mold, seal the mold with a sample, place the mold in a low temperature box at-30 ℃ for 30min, and measure the tensile force in real time with a portable sensor. Referring to fig. 6, the adhesion strength of the ordinary low Wen Gangbing is 502.3KPa, the adhesion strength of the ice of the inorganic super-hydrophobic anti-icing coating for low-temperature steel prepared in the first embodiment is 123.5KPa, and the adhesion strength of the ice of the inorganic super-hydrophobic anti-icing coating for low-temperature steel prepared in the second embodiment is 297.9KPa, which are all obviously smaller than that of the ordinary low-temperature steel, thus indicating the enhancement of deicing performance.
In summary, the embodiment of the application provides a preparation method of an inorganic super-hydrophobic anti-icing coating for low-temperature steel. By utilizing the intrinsic hydrophobic property of cerium oxide and through picosecond laser etching and magnetron sputtering deposition technology, an inorganic super-hydrophobic anti-icing coating is prepared on the surface of low-temperature steel. The environment-friendly inorganic super-hydrophobic coating prepared by the method avoids the defects of the traditional preparation method of the super-hydrophobic coating, does not need to use toxic organic substances with poor mechanical properties, has good anti-icing performance in a low-temperature environment, solves the problem that the super-hydrophobic coating is limited in application in severe environments such as polar regions, and has wide application potential in the field of anti-icing of polar region marine steel.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (8)
1. The preparation method of the marine low-temperature steel inorganic super-hydrophobic anti-icing coating structure is characterized by comprising the following steps of:
performing picosecond laser etching by designing vertical grid lines, wherein the distance between the vertical grid lines is 20-80 mu m, the laser diameter of the picosecond laser etching is 20 mu m, the picosecond laser power is 2.1-4.5W, the picosecond laser frequency is 400-2000 KHz, and the picosecond laser running speed is 20-300 mm/s, and preparing a prismatic table array on the surface of the low-temperature steel;
depositing a rare earth oxide coating on the surface of the prismatic table array;
high vacuum treatment of low temperature steel having the rare earth oxide coating.
2. The method for preparing the marine low-temperature steel inorganic super-hydrophobic anti-icing coating structure according to claim 1, wherein the rare earth oxide coating is deposited by magnetron sputtering of a rare earth oxide target in an inert gas environment.
3. The method for preparing the marine cryogenic steel inorganic superhydrophobic anti-icing coating structure according to claim 2, wherein the rare earth oxide is cerium oxide and the inert gas is argon.
4. The method for preparing the marine low-temperature steel inorganic super-hydrophobic anti-icing coating structure according to claim 2, wherein the vacuum degree of magnetron sputtering is 5×10 -4 Pa ~8×10 -4 Pa, the power of the magnetron sputtering is 100W, the air pressure of the magnetron sputtering is 2.4-Pa-3.6 Pa, and the time of the magnetron sputtering is 5-15 min.
5. The method for preparing the inorganic super-hydrophobic anti-icing coating structure for the marine low-temperature steel according to claim 1, wherein the vacuum degree of the high-vacuum treatment is 7×10 -5 Pa~1×10 -4 Pa, and the time of high vacuum treatment is 18-24 h.
6. The method for preparing a marine cryogenic steel inorganic superhydrophobic anti-icing coating structure according to claim 1, wherein the cryogenic steel surface is cleaned and sanded before the land array is prepared on the cryogenic steel surface.
7. An anti-icing coating structure using the method for preparing an inorganic super-hydrophobic anti-icing coating structure for low-temperature steel for ship according to claim 1, comprising:
the surface of the low-temperature steel is provided with a prismatic table array;
the surface of the prismatic table array is deposited with a rare earth oxide coating, and the rare earth oxide coating is subjected to high vacuum treatment.
8. The anti-icing coating structure using the method for manufacturing a marine cryogenic steel inorganic superhydrophobic anti-icing coating structure according to claim 7, wherein the rare earth oxide is cerium oxide.
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