Super-hydrophobic surface anti-scouring testing device and testing method

Abstract

The invention discloses a super-hydrophobic surface anti-scouring testing device and a testing method, relates to the technical field of super-hydrophobic treatment, and solves the problem of lack of a super-hydrophobic coating anti-scouring performance testing device suitable for a laboratory. A water tank communicates with an air compressor and a water pump; an objective table is arranged at the bottom in the water tank, a linear nozzle is arranged at the top in the water tank, and the objective table is opposite to the linear nozzle; a ducted fan is arranged on the linear nozzle, and the ducted fan is used for blowing the test sample; a motor is arranged on the side wall of the water tank, and a lead screw is arranged at the output end of the motor and provided with a drainage block. The water pump communicates with the bottom of the water tank through a water inlet pipe and communicates with the linear nozzle through a water outlet pipe. According to the method, environmental variables are controlled, so that the test of the super-hydrophobic reagent is standardized and easy to operate; the device can provide super-hydrophobic reagent test conditions of an underwater scene to meet super-hydrophobic reagent development and test requirements of underwater navigation bodies, ships and other underwater equipment in actual research.

Description

Technical Field

[0001] The invention relates to the technical field of super-hydrophobic treatment, and in particular to a super-hydrophobic surface anti-scouring testing device and a testing method. Background Art

[0002] The current super-hydrophobic surface shows broad prospects in the field of drag reduction. Super-hydrophobic surfaces can reduce the surface friction of objects in laminar and turbulent flows. The use of super-hydrophobic surfaces can change the no-slip condition to a slip condition, thereby reducing the object wall velocity gradient and wall shear stress. Therefore, the energy required for objects to move in the fluid or the fluid to flow in the pipe will be reduced, and the corresponding resistance will also be reduced.

[0003] A superhydrophobic surface is composed of surface roughness and low surface energy materials. The construction of surface roughness is usually related to the preparation method, and can be achieved on the surface of the substrate by plasma, photolithography, etc. The most commonly used method is to use nanomaterials to coat the surface of the substrate. Common nanomaterials include nanoparticles such as silicon dioxide, aluminum oxide, and zinc oxide. The superhydrophobic coating prepared by the above method is limited by materials and processes. Although some methods have been used to obtain excellent anti-fouling, self-cleaning, transparent and other superhydrophobic surfaces, they are mostly used in scenarios with low mechanical strength and are difficult to use in high-pressure and high-speed underwater environments. The above environment requires low adhesion and anti-scouring capabilities. The application of superhydrophobic coatings in the field of drag reduction inevitably involves limitations on durability and anti-scouring capabilities.

[0004] At present, many super-hydrophobic coatings have been developed for underwater environments. For laboratory environments, a convenient and simple device is needed to quantitatively test the anti-scouring performance of super-hydrophobic coatings, as well as to test super-hydrophobic coatings used in underwater scenes, so as to provide a basis for judgment for the subsequent development of coatings with better mechanical properties. Summary of the invention

[0005] In order to solve the above-mentioned problem of the lack of a convenient and simple super-hydrophobic coating anti-scouring performance test device suitable for laboratory environment, the present invention hereby proposes a super-hydrophobic surface anti-scouring test device and test method. The present invention can control environmental variables, so that the test of super-hydrophobic reagents is standardized and easy to operate; at the same time, the device can also provide super-hydrophobic reagent test conditions for underwater scenes, so as to meet the super-hydrophobic reagent development and test requirements for underwater navigation bodies or underwater equipment such as ships in actual research.

[0006] The present invention proposes a super-hydrophobic surface anti-scour testing device, which specifically comprises a water tank, an air compressor and a water pump, one side of the water tank is connected to the air compressor, and the other side is connected to the water pump; a loading platform is arranged at the bottom of the water tank, a linear nozzle is arranged at the top, and the loading platform and the linear nozzle are arranged coaxially; a ducted fan is arranged on the linear nozzle, and the ducted fan blows on a test sample placed on the upper end of the loading platform; a motor is arranged on the side wall of the water tank, a screw is arranged at the output end of the motor, and a drainage block is arranged on the screw; the water pump is connected to the bottom of the water tank through a water inlet pipe, and is connected to the linear nozzle through a water outlet pipe.

[0007] Furthermore, the upper end of the loading platform is an inclined surface.

[0008] Furthermore, a loading platform protrusion is arranged on the inclined surface at the upper end of the loading platform.

[0009] Furthermore, the air compressor is connected to the water tank through a pressurized air pipe, and an air intake valve is provided at the position where the pressurized air pipe and the water tank are connected.

[0010] Furthermore, a pressure gauge and a water filling port are arranged at the upper end of the water tank, and a water inlet valve is arranged on the water filling port.

[0011] Furthermore, the water tank comprises a water tank body and a water tank cover. The water tank cover is arranged on the side of the water tank body and connected to the water tank body through a plurality of buckle locks. A plurality of sealing strips are arranged between the water tank body and the water tank cover.

[0012] Furthermore, the water tank is a transparent water tank, and scale line 1 and scale line 2 are set on the side wall. Scale line 1 and the water outlet of the linear nozzle are at the same height, and scale line 2 and the test point on the inclined surface at the upper end of the stage are at the same height.

[0013] Furthermore, a flow meter and a micro-regulating valve are provided on the water outlet pipe.

[0014] Furthermore, a pressure regulating panel is provided on the water pump.

[0015] A testing method using the above-mentioned super-hydrophobic surface anti-scour testing device comprises the following steps:

[0016] Step 1: Determine the linear nozzle outlet velocity and the preset data of the flow meter, turn on the water pump, adjust the micro-adjusting valve until the flow meter reaches the preset reading, and turn off the water pump;

[0017] Step 2: Place the test sample on the stage and seal the water tank;

[0018] Step 3: Fill the water tank with water, and stop filling when the water level reaches the second scale line;

[0019] Step 4: Determine the pressure corresponding to the water depth to be simulated, and start the air compressor to pressurize the inside of the water tank;

[0020] Step 5: Start the motor and lower the drain block until the water level reaches scale line 1, so that the outlet of the linear nozzle just touches the liquid surface;

[0021] Step 6. Turn on the water pump and use water to flush the test sample. After completing one test, the drainage block rises to expose the test point, and the duct fan blows on the surface of the test sample to determine whether there is contact angle hysteresis, water droplet pinning or even infiltration, so as to determine the surface wear state of the test sample. After recording, start the next flushing test and repeat the above operation until the test sample is completely infiltrated.

[0022] The beneficial effects of the super-hydrophobic surface anti-scouring test device and test method described in the present invention are:

[0023] (1) The super-hydrophobic surface anti-scour test device and test method described in the present invention pressurizes the inside of the water tank through an air compressor, and can simulate the water pressure at different water depths by changing the air pressure at the liquid surface, so that the device can simulate the pressure conditions at different water depths and provide super-hydrophobic reagent test conditions for underwater scenes, so as to meet the requirements for super-hydrophobic reagent development and testing of underwater navigation bodies or underwater parts such as ships in actual research, and has a wider range of applications;

[0024] (2) The super-hydrophobic surface anti-scour testing device and testing method described in the present invention controls the up and down movement of the drainage block by means of a motor, thereby adjusting the liquid level position inside the water tank, making it convenient to observe the surface wear of the test sample;

[0025] (3) The super-hydrophobic surface anti-scouring test device and test method described in the present invention can provide a quantitative evaluation standard for the mechanical properties of super-hydrophobic reagents prepared in the laboratory, thereby providing intuitive and reliable data for the subsequent development of super-hydrophobic reagents; and the device controls environmental variables, making the test of super-hydrophobic reagents standardized and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] In the attached picture:

[0028] Figure 1 It is a structural schematic diagram of a super-hydrophobic surface anti-scouring test device according to the present invention;

[0029] Figure 2It is a schematic diagram of the internal structure of a water tank of a super-hydrophobic surface anti-scour testing device according to the present invention;

[0030] Figure 3 It is an operation flow chart of a super-hydrophobic surface anti-scour testing device according to the present invention;

[0031] Among them: 1-water tank, 2-air compressor, 3-pressurized air pipe, 4-inlet valve, 5-stage, 6-linear nozzle, 7-pressure gauge, 8-water inlet, 9-water inlet pipe, 10-water outlet pipe, 11-tank cover, 12-sealing strip, 13-flow meter, 14-micro-adjusting valve, 15-water pump, 16-pressure regulating panel, 17-motor, 18-drain block, 19-ducted fan, 20-screw, 21-scale line one, 22-scale line two, 23-stage protrusion, 24-hook lock, 25-inlet valve. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Specific implementation method 1: See Figure 1-Figure 3 The present embodiment is described in detail. The super-hydrophobic surface anti-scour test device described in the present embodiment specifically comprises a water tank 1, an air compressor 2 and a water pump 15. One side of the water tank 1 is connected to the air compressor 2, and the other side is connected to the water pump 15. A stage 5 is provided at the bottom of the water tank 1, and a test sample is placed on the stage 5. A linear nozzle 6 is provided at the top of the water tank 1. The stage 5 and the linear nozzle 6 are coaxially arranged, and the linear nozzle 6 sprays water to the test sample. A ducted fan 19 is provided on the linear nozzle 6, and the ducted fan 19 radiates water to the test sample placed on the upper end of the stage 5. Blowing; a motor 17 is arranged on the side wall of the water tank 1, a lead screw 20 is arranged at the output end of the motor 17, and a drainage block 18 is arranged on the lead screw 20. The liquid level in the water tank 1 is adjusted by lifting and lowering the drainage block 18, so as to record the maintenance state of the hydrophobic coating of the test sample by the water level during the short-cycle test; a water pump 15 is connected to the bottom of the water tank 1 through a water inlet pipe 9, and is connected to the linear nozzle 6 through a water outlet pipe 10. During the test, the water in the water tank is extracted by the water pump 15 and then sprayed toward the test sample by the linear nozzle 6. The water pump 15 is a CNC booster water pump.

[0037] The upper end of the stage 5 is an inclined surface, and the inclination angle ranges from 0 degrees to 90 degrees. The stage 5 can be replaced as needed. A stage protrusion 23 is provided on the inclined surface of the upper end of the stage 5, and the test sample is placed on the inclined surface of the upper end of the stage 5 through the stage protrusion 23 to prevent the test sample from sliding off the stage.

[0038] The air compressor 2 is connected to the water tank 1 through a pressurized air pipe 3, and an air intake valve 4 is provided at the position where the pressurized air pipe 3 and the water tank 1 are connected.

[0039] The upper end of the water tank 1 is provided with a pressure gauge 7 and a water inlet 8, and the water inlet 8 is provided with a water inlet valve 25.

[0040] The water tank 1 includes a water tank body and a water tank cover 11. The water tank cover 11 is arranged on the side of the water tank body and is connected to the water tank body through a plurality of buckle locks 24. A plurality of sealing strips 12 are arranged between the water tank body and the water tank cover 11. Specifically, the sealing strips 12 are installed in grooves around the water tank cover 11. When the buckle locks 24 are locked, it can ensure that the device remains airtight under the maximum air pressure required for the experiment.

[0041] The water tank 1 is a transparent water tank made of acrylic board. The side wall of the water tank 1 is provided with a scale line 1 21 and a scale line 2 22. The scale line 1 21 and the water outlet of the linear nozzle 6 are at the same height, and the scale line 2 22 and the test point of the upper inclined surface of the stage 5 are at the same height. The height distance between the scale line 2 22 and the water outlet of the linear nozzle 6 is 1 cm.

[0042] The water outlet pipe 10 is provided with a flow meter 13 and a micro-regulating valve 14 ; the water pump 15 is provided with a pressure regulating panel 16 .

[0043] A testing method using the above-mentioned super-hydrophobic surface anti-scour testing device comprises the following steps:

[0044] Step 1: determine the outlet velocity of the linear nozzle 6 and the preset data of the flow meter 13, turn on the water pump 15, adjust the micro-adjusting valve 14 until the flow meter 13 reaches the preset reading, and turn off the water pump 15;

[0045] Step 2: Place the processed test sample on the stage 5, with the lower edge of the test sample stuck on the stage protrusion 23 to prevent the test sample from being washed away by the water flow impact; press the water tank cover 11 tightly, and lock the buckle lock 24 to ensure that the water tank 1 does not leak when pressurized;

[0046] Step 3, fill water into the water tank 1, and stop filling water after the water level reaches the second scale line 22;

[0047] Step 4: Determine the pressure corresponding to the water depth to be simulated, start the air compressor 2 to pressurize the inside of the water tank 1 until the pressure displayed by the barometer 7 reaches the preset pressure;

[0048] Step 5: Start the motor 17 to lower the drain block 18 until the water level reaches the scale line 1 21, so that the outlet of the linear nozzle 6 just touches the liquid surface;

[0049] Step six, turn on the water pump 15, and use the water flow to flush the test sample; after completing one test, the drainage block 18 rises to expose the test point, and the duct fan 19 blows on the surface of the test sample to determine whether there is contact angle hysteresis, water droplet pinning or even infiltration, so as to determine the surface wear state of the test sample; after recording, start the next flushing test, repeat the above operation until the test sample is completely infiltrated, and record the test process with a camera.

[0050] The specific testing principle and process of the super-hydrophobic surface anti-scouring testing device described in the present invention are as follows:

[0051] The hydrostatic pressure formed by different water depths is simulated by different air pressures. The air compressor 2 is connected to the water tank 1 through the pressurized air pipe 3. The pressure provided by the air compressor 2 simulates the environment of different water depths, and the current air pressure is determined by the barometer 7 above the water tank 1.

[0052] The underwater pressure mainly depends on the water depth and the change in air pressure on the liquid surface. The distance between the water nozzle and the test point is 1 cm. Considering that the pressure provided by 1 cm of water depth is relatively small and can be ignored, it is easier to directly convert the change in liquid surface air pressure into equivalent water depth data. By changing the liquid surface air pressure, we can simulate different water depths. In order to simplify the problem, the air pressure is directly used to calculate the pressure of the water depth equivalently. The specific formula is:

[0053] P=P1+ρgh1

[0054] The equivalent water depth h can be expressed as:

[0055]

[0056] P is the underwater pressure; h1 is the distance between the outlet of the linear nozzle 6 and the test point on the upper end of the stage 5; h is the simulated equivalent water depth; P1 is the air pressure in the water tank; P0 is the standard atmospheric pressure; ρ is the density of water; g is the acceleration due to gravity;

[0057] The water pump 15 is connected to the water tank 1 through a water pipe, the water inlet direction of the water pump 15 is at the bottom, and the pipe at the center of the top of the water tank 1 is the water outlet pipe 10. The water outlet pipe 10 is connected to the linear nozzle 6, and the linear nozzle 6 sprays water in a straight line. The distance between the water outlet of the linear nozzle 6 and the test point is 1 cm, and the initial velocity of the water outlet of the linear nozzle 6 is regarded as the velocity of the test point being scoured.

[0058] The flow meter 13 can detect the current water flow rate, and the flow meter 13 display data can be adjusted by the micro-adjusting valve 14 to obtain the desired outlet flow rate. The continuity equation can be used to calculate the outlet velocity of the water pipe. It shows that the mass flow rate of the fluid in the closed system is conserved. The flow rate Q is the change of the volume of the fluid passing through a certain cross-sectional area over time.

[0059] Obtain the flow rate Q from the flow meter 13 and calculate the cross-sectional area A of the water pipe outlet:

[0060]

[0061] Wherein: D is the outlet diameter of the linear nozzle 6.

[0062] The water flow velocity of the straight nozzle 6 water outlet is:

[0063]

[0064] And this speed is the final speed of the water flow impacting the superhydrophobic surface.

[0065] The electromagnetic valve is opened and closed periodically for cyclic testing. During each flushing cycle, the drainage block 18 rises, the water level drops below the test point, and the duct fan 19 automatically starts and stops to blow on the super-hydrophobic surface of the test sample to determine whether there is contact angle hysteresis, water droplet pinning or even infiltration, so as to determine the wear state of the super-hydrophobic surface. The external camera records the data for data processing and storage.

[0066] Determine the required outlet velocity and the corresponding preset data of the flow meter 13, turn on the water pump 15, adjust the micro-adjusting valve 14 until the flow meter 13 reaches the preset reading, and turn off the water pump 15; take the outlet flow rate of 5m / s as an example, the nozzle is selected to be installed with a diameter of 5mm, and the flow meter 13 reading is adjusted to 0.0981L / s, and the outlet flow rate at this time is approximately 5m / s. As shown in Table 1, the corresponding table of the outlet flow rate of the linear nozzle 6 and the flow rate of the flow meter 13 when the pressure of the water pump 15 is constant.

[0067] Place the processed test sample on the stage 5, with the lower edge of the sample stuck on the stage protrusion 23 to prevent the sample from being washed away by the water flow. Press the water tank cover 11 tightly and lock the buckle lock 24 to ensure that the water tank 1 does not leak when pressurized.

[0068] Fill water into the water tank 1 from the water filling port 8 until the water level reaches the scale line 22, and then close the water filling port.

[0069] Determine the pressure P corresponding to the water depth h to be simulated, open the air inlet valve 14 connected to the air compressor 2, start the air compressor 2 to pressurize until the pressure displayed on the pressure gauge reaches the preset pressure P. Take the water depth of 2 meters as an example, simulate the pressure under 2 meters of water by changing the air pressure, turn on the air compressor 2 to inflate until the pressure displayed on the pressure gauge is 120945Pa, which is equivalent to the pressure of the object at a water depth of 2 meters. Table 2 shows the correspondence between the inflation pressure and the simulated water depth.

[0070] The motor 17 is started to lower the drainage block 18 until the water level reaches the scale line 21, at which time the water outlet of the linear nozzle 6 just touches the liquid surface.

[0071] Turn on the water pump 15, and the water flow performs a flushing test on the test sample at a regulated speed. When one cycle of the cycle time is reached, the drainage block 18 rises to expose the test sample, and the ducted fan 19 is turned on to blow on the super-hydrophobic surface of the test sample, to determine whether there is a contact angle hysteresis, water droplet pinning or even infiltration phenomenon, to determine the wear state of the super-hydrophobic surface of the test sample. After recording, the flushing test of the next cycle time is turned on, and the above operation is repeated until the super-hydrophobic surface of the test sample is completely infiltrated, and the above whole process is carried out under the record of the camera. After the timing of 30s ends when the water pump 15 is turned on, the water pump 15 is turned off, and the remote control drainage block 18 rises, and the test sample is exposed to the water surface, and the ducted fan 19 is started to blow air to the test sample, to determine whether there is a contact angle hysteresis, water droplet pinning or even infiltration phenomenon, to determine the wear state of the super-hydrophobic surface of the test sample. After recording the data, turn on the water pump 15 for 30s, and the above operation is recorded again in a cycle until the super-hydrophobic surface of the test sample is completely infiltrated.

[0072] Table 1 Correspondence table of outlet flow rate of linear nozzle 6 and flow rate of flow meter 13

[0073]

[0074]

[0075] Table 2 Correspondence between inflation pressure and simulated water depth

[0076]

[0077] Summarizing the above implementation cases, a super-hydrophobic surface anti-scour test device described in the present invention pressurizes the inside of the water tank 1 through an air compressor 2, and by changing the air pressure at the liquid surface, the water pressure at different water depths can be simulated, so that the device can simulate the pressure conditions at different water depths, and provide super-hydrophobic reagent test conditions for underwater scenes, so as to cope with the requirements for the development and testing of super-hydrophobic reagents for underwater navigation bodies or underwater parts such as ships in actual research, and the applicable conditions are wider; a super-hydrophobic surface anti-scour test device and test method described in the present invention control the up and down movement of the drainage block 18 through the set motor 17, thereby realizing the adjustment of the liquid level position inside the water tank 1, and facilitating the observation of the surface wear of the test sample; a super-hydrophobic surface anti-scour test device and test method described in the present invention can provide a laboratory-prepared super-hydrophobic reagent mechanical property quantitative evaluation standard, thereby providing intuitive and reliable data for the subsequent development of super-hydrophobic reagents; and the device controls environmental variables, so that the test of super-hydrophobic reagents is standardized and easy to operate.

[0078] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-hydrophobic surface anti-scouring test device, characterized in that: The invention comprises a water tank (1), an air compressor (2) and a water pump (15), wherein one side of the water tank (1) is connected to the air compressor (2), and the other side is connected to the water pump (15); a loading platform (5) is arranged at the bottom of the water tank (1), and a linear nozzle (6) is arranged at the top, wherein the loading platform (5) and the linear nozzle (6) are arranged coaxially; a ducted fan (19) is arranged on the linear nozzle (6), and the ducted fan (19) blows the test sample placed on the upper end of the loading platform (5); a motor (17) is arranged on the side wall of the water tank (1), and a lead screw (20) is arranged at the output end of the motor (17), and a drainage block (18) is arranged on the lead screw (20); the water pump (15) is connected to the bottom of the water tank (1) through a water inlet pipe (9), and is connected to the linear nozzle (6) through a water outlet pipe (10).

2. The super-hydrophobic surface anti-scouring test device according to claim 1, characterized in that: The upper end of the loading platform (5) is an inclined surface.

3. The super-hydrophobic surface anti-scouring test device according to claim 2, characterized in that: A loading platform protrusion (23) is provided on the inclined surface at the upper end of the loading platform (5).

4. The super-hydrophobic surface anti-scouring test device according to claim 1, characterized in that: The air compressor (2) is connected to the water tank (1) via a pressurized air pipe (3), and an air intake valve (4) is provided at the position where the pressurized air pipe (3) and the water tank (1) are connected.

5. The super-hydrophobic surface anti-scouring test device according to claim 1, characterized in that: The upper end of the water tank (1) is provided with a pressure gauge (7) and a water injection port (8), and the water injection port (8) is provided with a water inlet valve (25).

6. The super-hydrophobic surface anti-scouring test device according to claim 1, characterized in that: The water tank (1) comprises a water tank body and a water tank cover (11); the water tank cover (11) is arranged on the side of the water tank body and connected to the water tank body via a plurality of buckle locks (24); a plurality of sealing strips (12) are arranged between the water tank body and the water tank cover (11).

7. The super-hydrophobic surface anti-scouring test device according to claim 1, characterized in that: The water tank (1) is a transparent water tank, and a scale line 1 (21) and a scale line 2 (22) are arranged on the side wall. The scale line 1 (21) and the water outlet of the linear nozzle (6) are at the same height, and the scale line 2 (22) and the test point of the inclined surface at the upper end of the stage (5) are at the same height.

8. The super-hydrophobic surface anti-scouring test device according to claim 7, characterized in that: The water outlet pipe (10) is provided with a flow meter (13) and a micro-adjusting valve (14).

9. The super-hydrophobic surface anti-scouring test device according to claim 8, characterized in that: The water pump (15) is provided with a pressure regulating panel (16).

10. A testing method using the super-hydrophobic surface anti-scour testing device according to claim 9, characterized in that: The following steps are involved: Step 1: determine the outlet velocity of the linear nozzle (6) and the preset data of the flow meter (13), turn on the water pump (15), adjust the micro-adjusting valve (14) until the flow meter (13) reaches the preset reading, and turn off the water pump (15); Step 2: Place the test sample on the stage (5) and seal the water tank (1); Step 3, filling water into the water tank (1), and stopping filling water when the water level reaches the second scale line (22); Step 4: determine the pressure corresponding to the water depth to be simulated, and start the air compressor (2) to pressurize the inside of the water tank (1); Step 5: Start the motor (17) and lower the drain block (18) until the water level reaches the scale line 1 (21), so that the outlet of the linear nozzle (6) just touches the liquid surface; Step 6: Turn on the water pump (15) and use water to flush the test sample. After completing one test, the drainage block (18) rises to expose the test point, and the duct fan (19) blows on the surface of the test sample to determine whether there is contact angle hysteresis, water droplet pinning or even infiltration, so as to determine the wear state of the test sample surface. After recording, start the next flushing test and repeat the above operation until the test sample is completely infiltrated.

Images