Periodic infiltration corrosion simulation experiment device and method capable of setting infiltration time

Abstract

The invention belongs to the technical field of corrosion experiment equipment and is applied to research on corrosion performance of weather-resistant steel in a simulated atmospheric environment. The invention provides a periodic infiltration corrosion simulation experiment device and method capable of setting infiltration time, the periodic infiltration corrosion simulation experiment device comprises an experiment device box body, a corrosive liquid heating system, an air heating system, a humidification system, a dehumidification system, an air circulation system and a transmission system, and different infiltration environments, periods, corrosion temperatures and humidity are simulated through setting; corrosion of the weathering resistant steel in different atmospheric environments can be simulated, so that experimental conditions are provided for protection research of the weathering resistant steel.

Description

Technical Field

[0001] The present invention belongs to the technical field of corrosion test equipment and is applied to the corrosion test of weathering steel under simulated atmospheric environment. Specifically, it relates to a periodic immersion corrosion simulation test device with adjustable immersion time and an experimental method based on this device. Background Art

[0002] Atmospheric corrosion has always been an important cause of failure. Steel exposed to the atmosphere for a long time will be corroded by corrosion media in the atmosphere, and the corrosion will become more serious over time. In some environments, there may even be failures such as perforation and cracking, resulting in property losses and environmental pollution.

[0003] For common atmospheric corrosion situations, currently, surface treatment methods such as painting and spraying coatings are usually adopted. Although these methods are simple and easy to implement, they require additional resources, and some means also have problems such as being less environmentally friendly. If the atmospheric corrosion resistance of steel itself, that is, weathering steel, can be improved, it is expected to extend the service life of steel at a limited cost. Therefore, it is particularly important to carry out targeted simulated corrosion evaluation tests on weathering steel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problem of simulating atmospheric environment corrosion indoors and being able to change the periodic immersion cycle at the same time. The present invention provides a periodic immersion corrosion simulation test device and method with adjustable immersion time, aiming to simulate the corrosion conditions of weathering steel under different atmospheric types and environmental conditions, so as to provide experimental conditions for the corrosion protection research of this weathering steel.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] On the one hand, a periodic immersion corrosion simulation test device with adjustable immersion time is provided, which includes a box body, a corrosion liquid heating system, an air heating system, a humidifying system, a dehumidifying system, an air circulation system, and a transmission system; a corrosion liquid tank is arranged at the bottom of the box body, and a box cover is arranged above the box body; the box body is provided with openings for a viewing window, a humidifying system, and a dehumidifying system; the transmission system is fixed in the middle above the box body, and a sample rack with sample installation points is arranged at the lower end of the transmission system; the transmission system is controlled by a time relay, and different immersion cycles are simulated by setting parameters; the control elements of the corrosion liquid heating system, the air heating system, the humidifying system, the dehumidifying system, and the transmission system are all placed outside the box body and are connected to the working elements in the system through wires, and different corrosion temperatures and humidities are simulated by setting parameters.

[0007] As a further preferred solution, the etching solution heating system includes a first thermocouple, a first temperature controller, and a heating tube; the first thermocouple and the heating tube are placed inside the etching solution tank, the first temperature controller is placed outside the box body, and the first thermocouple and the heating tube are respectively connected to the first temperature controller through wires.

[0008] As a further preferred solution, the air heating system includes a second thermocouple, a second temperature controller, and baking lamps; the second thermocouple is suspended near the sample rack, the baking lamps are fixed at positions on both sides of the box body facing the sample rack, the second temperature controller is placed outside the box body, and the second thermocouple and the baking lamps are respectively connected to the second temperature controller through wires.

[0009] As a further preferred solution, the humidifying system includes an ultrasonic humidifier, a temperature and humidity controller, and a first temperature and humidity sensor; the first temperature and humidity sensor is fixed near the sample, the temperature and humidity controller and the ultrasonic humidifier are placed outside the box body, the ultrasonic humidifier is connected to the box body through a plastic tube, and the ultrasonic humidifier and the first temperature and humidity sensor are respectively connected to the temperature and humidity controller through wires.

[0010] As a further preferred solution, the dehumidifying system includes a semiconductor intelligent dehumidifier and a second temperature and humidity sensor; the second temperature and humidity sensor is fixed near the sample, the semiconductor intelligent dehumidifier is fixed at the opening on the outer side of the box body, and the second temperature and humidity sensor is connected to the semiconductor intelligent dehumidifier through a wire.

[0011] As a further preferred solution, the air circulation system includes a fan, and the fan is fixed on the side of the box body near the sample rack.

[0012] As a further preferred solution, the transmission system includes an electric push rod and a time relay, the electric push rod is fixed in the middle above the box body, the time relay is placed outside the box body, and the electric push rod is connected to the time relay through a wire.

[0013] As a further preferred solution, the box body is also equipped with a clamping hoop, a support, and a window. The clamping hoop is composed of two parts that are hinged to each other. The open ends of the two parts are connected by locking screws and installed on the side of the box body; the support is composed of angle steel and aluminum. The angle steel is installed on the side of the box body by welding, and the aluminum is connected to the angle steel by bolts; the outside of the window is a slidable transparent plastic plate.

[0014] On the other hand, a periodic immersion corrosion simulation experiment method is provided. Based on the above periodic immersion corrosion simulation experiment device with adjustable immersion time, the following experimental process is implemented:

[0015] Step 1: Measure and record the original mass and external dimensions of the sample; fix the sample on the sample rack under the electric push rod to keep the suspension height consistent; place the electric push rod into the box body and fix it.

[0016] Step 2: Add a sufficient amount of etching solution into the etching solution tank through the window.

[0017] Step 3: Close the box cover and place the second thermocouple of the air heating device into the hole above the box cover.

[0018] Step 4: Heat the internal environment of the box through the heating tube and baking lamp, and set the temperature in cooperation with the first and second temperature controllers and the first and second thermocouples to simulate the corrosion environment temperature. Any temperature between 10°C and 80°C can be set for the experimental conditions.

[0019] Step 5: Adjust the humidity of the internal environment of the box through ultrasonic humidification and semiconductor intelligent dehumidification, and set the humidity in cooperation with the temperature and humidity controller to simulate the environmental humidity. Any relative humidity between 10%RH and 90%RH can be set for the experimental conditions.

[0020] Step 6: Set the parameter values of the time relay to determine the cycle period; the soaking time and drying time can be set to any time within 1 minute to 999 minutes respectively.

[0021] Step 7: Turn on the fan and the electric push rod to conduct the experiment.

[0022] Step 8: After the experiment reaches the cycle, stop the machine, remove the sample, clean it, place it in a dryer for drying, and then weigh the sample again.

[0023] As a further preferred solution, in Steps 2 - 6, according to different experimental requirements, different types of etching solutions are added, different temperature and humidity conditions are set, as well as the soaking and drying times, to simulate different corrosion environments.

[0024] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects: strong operability, strong adaptability, practicality, easy processing and maintenance, making up for the disadvantages of the traditional periodic immersion corrosion experiment, such as high requirements for the device, too large reduction ratio of the transmission device, and inconvenient adjustment of the immersion cycle, and providing the equipment hardware conditions for the corrosion research of weathering steel in the atmospheric environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention.

[0026] Figure 1 It is a front view schematic diagram of the periodic immersion corrosion simulation experimental device of the embodiment of the present invention.

[0027] Figure 2 It is a side view schematic diagram of the periodic immersion corrosion simulation experimental device of the embodiment of the present invention.

[0028] Figure 3 Schematic diagram of the external controller of the periodic immersion corrosion simulation experimental device according to an embodiment of the present invention.

[0029] Figure 4 Graph showing the change of the corrosion rate of the sample with the corrosion temperature according to an embodiment of the present invention.

[0030] Figure 5 Graph showing the change of the corrosion rate of the sample with the corrosion humidity according to an embodiment of the present invention.

[0031] Figure 6 Graph showing the change of the corrosion rate of the sample with time under the simulated industrial atmospheric environment according to an embodiment of the present invention.

[0032] Figure 7 Graph showing the change of the corrosion rate of the sample with time under the simulated marine environment according to an embodiment of the present invention.

[0033] Reference numerals in the figure and corresponding component names: 1 - box body, 2 - corrosion liquid tank, 3 - box cover, 4 - first thermocouple, 5 - first temperature controller, 6 - heating tube, 7 - second thermocouple, 8 - second temperature controller, 9 - baking lamp, 10 - ultrasonic humidifier, 11 - temperature and humidity controller, 12 - first temperature and humidity sensor, 13 - semiconductor intelligent dehumidifier, 14 - second temperature and humidity sensor, 15 - fan, 16 - electric push rod, 17 - time relay, 18 - cross beam, 19 - sample rack, 20 - clamping hoop, 21 - angle steel, 22 - aluminum material, 23 - window, 24 - sample. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that: the present invention does not have to adopt these specific details. In other instances, well-known structures, circuits, materials or methods have not been specifically described in order to avoid obscuring the present invention.

[0036] Throughout the specification, references to "one embodiment", "an embodiment", "an example" or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "an example" or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. In addition, specific features, structures, or characteristics may be combined in any suitable combination and / or sub - combination in one or more embodiments or examples. Further, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. are based on the orientation or positional relationships 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 thus should not be construed as limiting the protection scope of the present invention.

[0038] The corrosion of weathering steel in the natural atmospheric environment is often accompanied by the process of alternating wet and dry cycles. Therefore, it is particularly necessary to establish a periodic immersion corrosion simulation experimental device to simulate the atmospheric corrosion environment and carry out targeted corrosion evaluation experiments. In order to overcome the disadvantages of the existing devices, the present invention provides a periodic immersion corrosion simulation experimental device and method, aiming to simulate the corrosion situation of weathering steel in the atmospheric environment with a certain temperature and humidity, so as to provide experimental conditions for the research on the corrosion protection of this kind of weathering steel.

[0039] Embodiment 1

[0040] This embodiment provides a periodic immersion corrosion simulation experimental device with adjustable immersion time, as Figure 1 、 2As shown in Figures 3, it includes a box body 1, a corrosion liquid heating system, an air heating system, a humidifying system, a dehumidifying system, an air circulation system, and a transmission system; the box body 1 is a stainless steel hollow cube structure, with a corrosion liquid tank 2 provided at the bottom of the box body, and a box cover 3 provided above the box body. Openings are provided on the side of the box body for the use of the viewing window 23, the humidifying system, and the dehumidifying system; the corrosion liquid heating system is arranged inside the corrosion liquid tank 2 and outside the box body; the air heating system is arranged on both sides of the box body and outside the box body; the humidifying system is arranged outside the box body; the dehumidifying system is arranged outside the box body; the transmission system is fixed to the middle part above the box body through a cross beam 18, and a sample rack 19 with sample installation positions is arranged at the lower end of the transmission system. The sample 24 is connected to the sample rack 19 through a plastic-coated iron wire.

[0041] As a further preferred solution, as Figure 1 、 3 shown, the corrosion liquid heating system includes a first thermocouple 4, a first temperature controller 5, and a heating tube 6; the first thermocouple 4 and the heating tube 6 are placed inside the corrosion liquid tank 2, the first temperature controller 5 is placed outside the box body, and the first thermocouple 4 and the heating tube 6 are respectively connected to the temperature controller 5 through wires.

[0042] As a further preferred solution, as Figure 1 、 2 、3 shown, the air heating system includes a second thermocouple 7, a second temperature controller 8, and a baking lamp 9; the second thermocouple 7 is suspended near the sample rack 19, the baking lamp 9 is fixed at positions on both sides of the box body facing the sample rack, the second temperature controller 8 is placed outside the box body, and the second thermocouple 7 and the baking lamp 9 are respectively connected to the second temperature controller 8 through wires.

[0043] As a further preferred solution, as Figure 2 shown, the humidifying system includes an ultrasonic humidifier 10, a temperature and humidity controller 11, and a first temperature and humidity sensor 12; the first temperature and humidity sensor 12 is fixed near the sample 24, the temperature and humidity controller 11 and the ultrasonic humidifier 10 are placed outside the box body, the ultrasonic humidifier 10 is connected to the box body 1 through a plastic tube, and the ultrasonic humidifier 10 and the first temperature and humidity sensor 12 are respectively connected to the temperature and humidity controller 11 through wires.

[0044] As a further preferred solution, as Figure 2 、 3 shown, the dehumidifying system includes a semiconductor intelligent dehumidifier 13 and a second temperature and humidity sensor 14; the second temperature and humidity sensor 14 is fixed near the sample 24, the semiconductor intelligent dehumidifier 13 is fixed at the opening on the outer side of the box body 1, and the second temperature and humidity sensor 14 is connected to the semiconductor intelligent dehumidifier 13 through a wire.

[0045] As a further preferred solution, as Figure 1As shown, the air circulation system includes a fan 15, which is fixed to the side of the box near the sample rack 19.

[0046] As a further preferred solution, as Figure 1 , 3 shown, the drive system includes an electric push rod 16 and a time relay 17. The electric push rod 16 is fixed to the middle part above the box, and the time relay 17 is placed outside the box. The electric push rod 16 is connected to the time relay 17 through a wire.

[0047] As a further preferred solution, as Figure 1 , 2 shown, the box is also equipped with a clamping hoop 20, a support, and a window 23. The clamping hoop 20 is composed of two hinged parts. The open ends of the two parts are connected by locking screws and installed on the side of the box. The support is composed of an angle steel 21 and an aluminum material 22. The angle steel 21 is installed on the side of the box by welding, and the aluminum material 22 is connected to the angle steel 21 by bolts. The outside of the window 23 is a slidable transparent plastic plate.

[0048] Example 2

[0049] This example provides a periodic immersion corrosion simulation experiment method. Based on the periodic immersion corrosion simulation experiment device with adjustable immersion time described in Example 1, the following experimental process is implemented:

[0050] Step 1: Measure and record the original mass and external dimensions of the sample 24. Fix the sample 24 to the sample rack 19 below the electric push rod 16 through plastic-coated iron wire, and keep the hanging height consistent. Place the electric push rod 16 into the box and fix it with bolts;

[0051] Step 2: Add sufficient corrosion solution to the corrosion liquid tank 2 through the window 23;

[0052] Step 3: Close the box cover 3, and place the second thermocouple 7 of the air heating device into the hole above the box cover 3;

[0053] Step 4: Heat the internal environment of the box through the heating tube 6 and the baking lamp 9, and set the temperature in cooperation with the first temperature controller 5, the second temperature controller 8, the first thermocouple 4, and the second thermocouple 7 to simulate the corrosion environment temperature. The experimental conditions can be set to any temperature between 10°C and 80°C;

[0054] Step 5: Adjust the humidity of the internal environment of the box through ultrasonic humidification 10 and a semiconductor intelligent dehumidifier 13, and set the humidity in cooperation with the temperature and humidity controller 11 to simulate the environmental humidity. The experimental conditions can be set to any relative humidity between 10%RH and 90%RH;

[0055] Step 6: Set the parameter values of the time relay 17 to determine the cycle period. The soaking time and drying time can be set to any time within 1 minute to 999 minutes respectively;

[0056] Step 7: Turn on the fan 15, activate the electric push rod 16, and conduct the experiment;

[0057] Step 8: After the experiment reaches the termination time, stop the machine, remove the sample 24, clean it thoroughly, place it in a desiccator, and weigh the mass of the sample 24 again after drying for 24 hours.

[0058] The fan 15 is driven by a 12V DC power supply, the electric push rod 16 is driven by a 24V DC power supply, and the remaining electrical components are driven by a 220V AC power supply. During the experiment, a calibrated mercury thermometer is used to calibrate the temperature near the sample, and the set values of the first temperature controller 5 and the second temperature controller 8 are adjusted accordingly. At the same time, the evaporation of the corrosive solution and the consumption of the corrosive medium are involved during the experiment. Therefore, according to the TB / T 2375-1993 standard, a certain amount of supplementary solution is added to the corrosion liquid tank 2 every day.

[0059] As a further preferred embodiment, in steps 3 - 4, different corrosion temperatures are set according to different experimental requirements to simulate the atmospheric environment at different temperatures. Measure the average corrosion rate of the sample 24 (the sample 24 is weathering steel, the experimental corrosion humidity is set to 70% RH, and the corrosive solution is 0.01mol / L NaHSO3 solution) at different temperatures. The experimental results are as Figure 4 shown. The results show that when the corrosion temperature increases, the corrosion rate of the sample 24 gradually increases, and when the corrosion temperature is greater than 45°C, the increment of the corrosion rate increases gradually with the temperature.

[0060] As a further preferred embodiment, in step 5, different corrosion humidities are set according to different experimental requirements to simulate the atmospheric environment at different humidities. Measure the average corrosion rate of the sample 24 (the sample 24 is weathering steel, the experimental corrosion temperature is set to 45°C, and the corrosive solution is 0.01mol / L NaHSO3 solution) at different humidities. The experimental results are as Figure 5 shown. The results show that when the corrosion humidity increases, the corrosion rate of the sample 24 gradually increases, but when the corrosion humidity is greater than 70% RH, the increment of the corrosion rate gradually decreases and tends to be stable, that is, there is a critical value for the influence of humidity on the corrosion rate of the sample 24.

[0061] As a further preferred embodiment, in step 2, different corrosive solutions are set according to different experimental requirements to simulate the industrial atmospheric environment or the marine atmospheric environment. Measure the average corrosion rate of the sample 24 at different corrosion times. The experimental results are as Figure 6As shown, the results indicate that under the simulated industrial atmospheric environment (sample 24 is weathering steel, the experimental corrosion temperature is set at 45 °C, the corrosion humidity is 70% RH, and the corrosion solution is 0.01 mol / L NaHSO3 solution), the corrosion rate of sample 24 decreases as a power function with the corrosion time; under the simulated marine atmospheric environment (the experimental corrosion temperature is set at 45 °C, the corrosion humidity is 70% RH, and the corrosion solution is 0.1 wt.% NaCl + 0.05 wt.% CaCl2 + 0.05 wt.% Na2SO4 solution), as Figure 7 shown, the results show that the corrosion rate of sample 24 first increases and then decreases with the corrosion time.

[0062] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A periodic immersion corrosion simulation experimental device with adjustable immersion time, characterized in that: It includes a box body, a corrosion liquid heating system, an air heating system, a humidifying system, a dehumidifying system, an air circulation system, and a transmission system; a corrosion liquid tank is arranged at the bottom of the box body, and a box cover is arranged above the box body; the box body is provided with openings for a viewing window, a humidifying system, and a dehumidifying system; the transmission system is fixed in the middle above the box body, and a sample rack with sample mounting points is arranged at the lower end of the transmission system; the transmission system is controlled by a time relay, and different infiltration periods are simulated by setting parameters; the control elements of the corrosion liquid heating system, the air heating system, the humidifying system, the dehumidifying system, and the transmission system are all placed outside the box body and are connected to the working elements inside the box body through wires, and different corrosion temperatures and humidities are simulated by setting parameters.

2. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 1, characterized in that: The corrosion liquid heating system includes a first thermocouple, a first temperature controller, and a heating tube; the first thermocouple and the heating tube are placed inside the corrosion liquid tank, the first temperature controller is placed outside the box body, and the first thermocouple and the heating tube are respectively connected to the first temperature controller through wires.

3. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 2, characterized in that: The air heating system includes a second thermocouple, a second temperature controller, and baking lamps; the second thermocouple is suspended near the sample rack, the baking lamps are fixed at positions on both sides of the box body facing the sample rack, the second temperature controller is placed outside the box body, and the second thermocouple and the baking lamps are respectively connected to the second temperature controller through wires.

4. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 3, characterized in that: The humidifying system includes an ultrasonic humidifier, a temperature and humidity controller, and a first temperature and humidity sensor; the first temperature and humidity sensor is fixed near the sample, the temperature and humidity controller and the ultrasonic humidifier are placed outside the box body, the ultrasonic humidifier is connected to the box body through a plastic tube, and the ultrasonic humidifier and the first temperature and humidity sensor are respectively connected to the temperature and humidity controller through wires.

5. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 4, characterized in that: The dehumidifying system includes a semiconductor intelligent dehumidifier and a second temperature and humidity sensor; the second temperature and humidity sensor is fixed near the sample, the semiconductor intelligent dehumidifier is fixed at the opening on the outer side of the box body, and the second temperature and humidity sensor is connected to the semiconductor intelligent dehumidifier through a wire.

6. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 5, characterized in that: The air circulation system includes a fan, and the fan is fixed on the side of the box body near the sample rack.

7. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to claim 6, characterized in that: The transmission system includes an electric push rod and a time relay, the electric push rod is fixed in the middle above the box body, the time relay is placed outside the box body, and the electric push rod is connected to the time relay through a wire.

8. The periodic immersion corrosion simulation experimental device with adjustable immersion time according to any one of claims 1 to 7, characterized in that: The box body is also equipped with a clamping hoop, a support, and a viewing window. The clamping hoop is composed of two parts that are hinged to each other. The open ends of the two parts are connected by locking screws and are installed on the side of the box body; the support is composed of an angle steel and an aluminum material. The angle steel is installed on the side of the box body by welding, and the aluminum material is connected to the angle steel by bolts; the outside of the viewing window is a slidable transparent plastic plate.

9. A periodic immersion corrosion simulation experiment method with adjustable immersion time, characterized in that, Based on the periodic infiltration corrosion simulation experimental device with adjustable infiltration time described in claim 7, the following experimental process is implemented: Step 1: Measure and record the original mass and external dimensions of the sample; fix the sample on the sample rack under the electric push rod to keep the suspension height consistent; place the electric push rod into the box body and fix it. Step 2: Add sufficient corrosion solution to the corrosion liquid tank through the viewing window. Step 3: Close the box cover and place the second thermocouple of the air heating device into the hole above the box cover. Step 4: Heat the internal environment of the box through the heating tube and baking lamp, and set the temperature in cooperation with the first and second temperature controllers and the first and second thermocouples to simulate the corrosion environment temperature. Any temperature between 10°C and 80°C can be set for the experimental conditions; Step 5: Adjust the humidity of the internal environment of the box through ultrasonic humidification and semiconductor intelligent dehumidifier, and set the humidity in cooperation with the temperature and humidity controller to simulate the environmental humidity. Any relative humidity between 10%RH and 90%RH can be set for the experimental conditions; Step 6: Set the parameter values of the time relay to determine the cycle period; the soaking time and drying time can be set to any time within 1 minute to 999 minutes respectively; Step 7: Turn on the fan and start the electric push rod to conduct the experiment; Step 8: After the experiment reaches the cycle, stop the machine, remove the sample and clean it, place it in a dryer to dry, and then weigh the sample again.

10. The periodic immersion corrosion simulation experiment method with adjustable immersion time according to claim 9, characterized in that: In Steps 2-6, according to different experimental requirements, different types of corrosion solutions are added, different temperature and humidity conditions are set, as well as the soaking and drying times, to simulate different corrosion environments.

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