Cross-regional multi-factor corrosion simulation test device and method suitable for offshore wind power

Abstract

The invention relates to a cross-regional multi-factor corrosion simulation test device and method suitable for offshore wind power. The device comprises a test tank, a liquid storage tank, a multi-layer sample fixing frame, a temperature and humidity sensor, a solution atomization assembly, a water level control assembly, a cover plate and a water bath tank, the multi-layer sample fixing frame is arranged at the bottom of the test tank, the solution atomization assembly is arranged outside the test tank and connected with the test tank, the cover plate is arranged above the test tank, and the temperature and humidity sensor is embedded in the cover plate; the water level control assembly is connected with the test tank and the liquid storage tank and can adjust the water level in the test tank and the liquid storage tank. The water bath can control the temperature of a solution in the water bath. Compared with the prior art, the cross-regional multi-factor coupling corrosion simulation test device meeting the service condition of the wind power tower drum is constructed, and the corrosion rates of the wind power tower drum and an engineering structure with similar working conditions in a plurality of ocean regions can be synchronously measured.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power material corrosion simulation test, and in particular to a device and method for cross-regional multi-factor corrosion simulation test suitable for offshore wind power. Background Art

[0002] The ocean is rich in resources, such as oil, gas, and ocean energy. It has huge potential economic value and an important strategic position, but it also brings new challenges. In complex marine environments such as high humidity, high salt fog, and long sunshine, materials will inevitably suffer from severe corrosion, which poses a severe challenge to the corrosion protection of offshore wind power equipment. At the same time, due to the special geographical environment of offshore wind power equipment, this will increase the cost of later maintenance. Therefore, marine corrosion will not only shorten the operating life of offshore wind turbines, but also increase the safety hazards and operation and maintenance costs caused by corrosion.

[0003] At present, the research on the corrosion problem of offshore wind power mainly relies on the real sea hanging method, but this method has many problems. Not only is the test cycle long, but it also consumes a lot of manpower and material resources. In addition, the harsh marine environment easily leads to large deviations in experimental data and loss of samples. In addition, most of the existing laboratory simulated seawater corrosion tests focus on simulating a single marine environment, making it difficult to simultaneously evaluate the corrosion problems of multiple marine areas and realize cross-regional corrosion research on offshore wind power towers. Therefore, there is an urgent need for a cross-regional multi-factor corrosion simulation test device and method suitable for offshore wind power towers. This will be conducive to the study of corrosion laws and life assessment of offshore wind power steel, and provide a basis for the upgrading of offshore wind power materials. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a cross-regional multi-factor corrosion simulation test device and method suitable for offshore wind power. Aiming at the corrosion rate measurement and risk assessment of multi-region conditions such as full immersion, tidal range and atmosphere faced by offshore wind turbine towers, a cross-regional multi-factor coupled corrosion simulation test device that meets the service conditions of wind turbine towers is constructed, which realizes the coordinated control of typical marine corrosion environmental factors such as temperature, humidity, salt concentration and tidal range cycle, and can synchronously measure the corrosion rates of wind turbine towers and engineering structures with similar working conditions in multiple marine areas.

[0005] The present invention provides a cross-regional multi-factor corrosion simulation test device suitable for offshore wind power, comprising: a test tank, a liquid storage tank, a multi-layer sample fixing rack, a temperature and humidity sensor, a solution atomization component, a water level control component, a cover plate, and a water bath;

[0006] The multi-layer sample fixing frame is arranged at the bottom of the test tank, the solution atomization assembly is arranged outside the test tank, the solution atomization assembly is connected to the test tank, the cover plate is arranged above the test tank, and the temperature and humidity sensor is embedded in the cover plate;

[0007] The water level control component is connected to the test tank and the liquid storage tank respectively, and the water level control component can adjust the water levels in the test tank and the liquid storage tank; the water bath tank can control the temperature of the solution inside it.

[0008] Furthermore, the test trough, the multi-layer sample fixing frame and the cover plate can form a free disassembly and assembly mode, and can also be made into an integral structure.

[0009] Furthermore, the multi-layer sample fixing frame is provided with five layers, which correspond to the seawater full immersion area, the low tidal range area, the medium tidal range area, the high tidal range area and the marine atmosphere area from bottom to top.

[0010] Furthermore, the solution atomization assembly has a function of controllable atomization speed to achieve regulation and control of the humidity above the solution in the test tank; the solution atomization assembly is connected to the test tank through a rubber hose, and maintains air pressure balance with the help of the through holes on the side wall of the test tank.

[0011] Furthermore, the temperature and humidity sensor is connected to the cover plate and sealed, and can display the temperature and humidity information in real time and record it at a fixed period.

[0012] Furthermore, the water level control component is connected to the test tank and the liquid storage tank at the same time, the connection is sealed, and can regularly drive the solution in the tank to flow freely between the test tank and the liquid storage tank to achieve the adjustment of the water level height in the test tank.

[0013] The present invention also provides a cross-regional multi-factor corrosion simulation test method suitable for offshore wind power, comprising the following steps:

[0014] S1: Experimental preparation stage: Process the sample; add the required solution into the test tank, connect the test tank and the reservoir tank through the water level control component, and adjust all the solutions into the reservoir tank;

[0015] S2: Experiment start stage: fix the sample on the multi-layer sample fixing frame, start the water level control component to inject the solution in the storage tank into the test tank, simulate the full immersion area and tidal range area of ​​the marine environment; after the solution in the test tank reaches the set maximum liquid level, turn on the solution atomization component and water bath, and adjust the atomization rate and the temperature in the tank according to the temperature and humidity required for the test;

[0016] S3: Observe the changes in the readings of the temperature and humidity sensors above the test tank, and start timing after the working parameters in the tank are stable; at the same time, turn on the water level control component to adjust the water level in the test tank at a set frequency to achieve a fixed frequency water level cycle;

[0017] S4: Carry out the experiment according to the number of cycles required by the experiment. After the experiment, turn off the solution atomization component and the water level control component, open the upper cover, take out the sample, dry it, clean it, blow it dry, and weigh it. Calculate the weight loss per unit area based on the weight loss before and after the test, and measure the surface corrosion to evaluate the corrosion resistance and corrosion risk of the material in different marine areas;

[0018] S5: Confirm that the test is completed, drain the solution in the test tank and the storage tank, and clean the equipment.

[0019] Furthermore, in S1, a sample of the tower material to be tested is processed, the sample is polished with sandpaper and weighed.

[0020] Furthermore, in S4, the sample is washed with acid and then cleaned with deionized water and alcohol, respectively.

[0021] Further, in S4, the measured surface corrosion condition includes a maximum corrosion depth parameter.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present invention aims at the corrosion rate measurement and risk assessment of multi-region conditions such as full immersion, tidal range and atmosphere faced by offshore wind turbine towers, and constructs a cross-regional multi-factor coupled corrosion simulation test device that meets the service conditions of wind turbine towers. It realizes the coordinated control of typical marine corrosion environment factors such as temperature, humidity, salt concentration and tidal range cycle, and can evaluate the corrosion problems of multiple marine areas at the same time. It solves the problems of the existing test equipment such as the single simulation environment and the low degree of simulation restoration of the real marine environment, and can synchronously measure the corrosion rates of wind turbine towers and engineering structures with similar working conditions in multiple marine areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a test device for offshore wind power tower;

[0025] Figure 2 The corrosion rate of Q550D steel for offshore wind power in different regions and at different times;

[0026] Figure 3 The 3D morphology and maximum corrosion depth of Q550D steel for offshore wind power in high tidal range at different times;

[0027] Figure 4The 3D morphology and maximum corrosion depth of Q550D steel for offshore wind power in the middle tidal range area at different periods;

[0028] Figure 5 The 3D morphology and maximum corrosion depth of Q550D steel for offshore wind power in low tidal range areas at different times;

[0029] Figure 6 The 3D morphology and maximum corrosion depth of Q550D steel for offshore wind power in the full immersion area at different times.

[0030] Figure numerals: 1-test tank; 2-liquid storage tank; 3-multi-layer sample fixing rack; 4-temperature and humidity sensor; 5-solution atomization component; 6-water level control component; 7-cover plate; 8-water bath. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0032] Example 1

[0033] This embodiment provides a multi-factor corrosion simulation test device suitable for offshore wind power cross-regional. Figure 1 As shown, it includes: a test tank 1, a liquid storage tank 2, a multi-layer sample fixing frame 3, a temperature and humidity sensor 4, a solution atomization component 5, a water level control component 6, a cover plate 7, and a water bath 8;

[0034] The multi-layer sample fixing frame 3 is arranged at the bottom of the test tank 1, the solution atomizing assembly 5 is arranged outside the test tank 1, the solution atomizing assembly 5 is connected to the test tank 1, the cover plate 7 is arranged above the test tank 1, and the temperature and humidity sensor 4 is embedded in the cover plate 7;

[0035] The water level control component 6 is connected to the test tank 1 and the liquid storage tank 2 respectively, and the water level control component 6 can adjust the water levels in the test tank 1 and the liquid storage tank 2; the water bath 8 can control the temperature of the solution therein.

[0036] In a specific implementation, the test tank 1, the multi-layer sample fixing frame 3 and the cover plate 7 can form a free disassembly and assembly mode, and can also be made into an integral structure.

[0037] In a specific implementation, the multi-layer sample fixing frame 3 is provided with five layers, which correspond to the seawater full immersion area, the low tidal range area, the medium tidal range area, the high tidal range area and the marine atmosphere area from bottom to top.

[0038] In a specific embodiment, the solution atomization assembly 5 has a function of controllable atomization speed to achieve regulation and control of the humidity above the solution in the test tank 1; the solution atomization assembly 5 is connected to the test tank 1 through a rubber hose, and maintains air pressure balance with the help of the through holes on the side wall of the test tank 1.

[0039] In a specific implementation, the temperature and humidity sensor 4 is connected to the cover plate 7 and sealed, and can display the temperature and humidity information in real time and record it at a fixed period.

[0040] In a specific embodiment, the water level control component 6 is connected to the test tank 1 and the liquid storage tank 2 at the same time, the connection is sealed, and it can regularly drive the solution in the tank to flow freely between the test tank 1 and the liquid storage tank 2 to achieve the adjustment of the water level height in the test tank 1.

[0041] This embodiment also provides a cross-regional multi-factor corrosion simulation test method suitable for offshore wind power, comprising the following steps:

[0042] S1: Experimental preparation stage: Process the sample; add the required solution into the test tank 1, connect the test tank 1 and the liquid storage tank 2 through the water level control component 6, and adjust all the solutions into the liquid storage tank 2;

[0043] S2: Experiment start stage: fix the sample on the multi-layer sample fixing frame 3, start the water level control component 6 to inject the solution in the liquid storage tank 2 into the test tank 1, simulating the full immersion area and tidal range area of ​​the marine environment; after the solution in the test tank 1 reaches the set maximum liquid level, turn on the solution atomization component 5 and the water bath 8, and adjust the atomization rate and the temperature in the tank according to the temperature and humidity required for the test;

[0044] S3: Observe the change of the reading of the temperature and humidity sensor 4 above the test tank 1, and start timing after the working parameters in the tank are stable; at the same time, turn on the water level control component 6, so that the water level control component 6 adjusts the water level in the test tank 1 according to the set frequency, so as to realize the water level cycle with a fixed frequency;

[0045] S4: Conduct the experiment according to the number of cycles required by the experiment. After the experiment, turn off the solution atomization component 5 and the water level control component 6, open the upper cover 7, take out the sample, dry it, clean it, blow it dry, and weigh it. Calculate the weight loss per unit area based on the weight loss before and after the test, and measure the surface corrosion to evaluate the corrosion resistance and corrosion risk of the material in different marine areas;

[0046] S5: Confirm that the test is completed, drain the solution in the test tank 1 and the liquid storage tank 2, and clean the equipment.

[0047] In a specific implementation, in S1, a sample of the tower material to be tested is processed, the sample is polished with sandpaper and weighed.

[0048] In a specific implementation manner, in S4, the sample is washed with acid and then cleaned with deionized water and alcohol respectively.

[0049] In a specific implementation, in S4, the measured surface corrosion condition includes a maximum corrosion depth parameter.

[0050] Based on the above test method, Figure 2-6 As shown, in this embodiment, Q550D steel is used as the metal sample to study its corrosion rate and risk assessment under multi-region conditions such as full immersion, tidal range and atmosphere. The composition of Q550D steel is shown in Table 1.

[0051] Table 1 Chemical composition of Q550D steel (wt%)

[0052]

[0053] This experiment uses steel samples with a length of 20mm, a width of 10mm, and a thickness of 3mm as the test samples. A hole is punched in the middle of the upper part of each sample to facilitate the passage of fishing line and fixation on the multi-layer sample fixing frame 3. The test takes 24 hours as a cycle, the full immersion area is always immersed, and the tidal range area is set to 12 hours of immersion and 12 hours of drying. The test sampling time is 7d, 15d, 30d, 60d, 120d, and 180d respectively.

[0054] Before the test, each sample was polished step by step with 240#-2000# SiC sandpaper, and then alcohol was used to remove the grease attached to the surface, and a hair dryer was used to dry it for use, and then weighed. A fishing line was hung on each sample, numbered in sequence, and fixed on the multi-layer sample holder 3 in sequence. The solution used in the test was artificial seawater prepared by the laboratory. After the samples were ready, the experiment started according to the set cycle. Samples from each area were taken out at different sampling times, rust removed, and weighed. The weight loss per unit area was calculated based on the weight loss before and after the test, and the surface corrosion conditions, such as the maximum corrosion depth and other parameters, were measured.

[0055] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0056] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A multi-factor corrosion simulation test device suitable for offshore wind power cross-regional, characterized in that: include: Test tank (1), liquid storage tank (2), multi-layer sample fixing frame (3), temperature and humidity sensor (4), solution atomization component (5), water level control component (6), cover plate (7), water bath tank (8); The multi-layer sample fixing frame (3) is arranged at the bottom of the test tank (1), the solution atomizing assembly (5) is arranged outside the test tank (1), the solution atomizing assembly (5) is connected to the test tank (1), the cover plate (7) is arranged above the test tank (1), and the temperature and humidity sensor (4) is embedded in the cover plate (7); The water level control component (6) is connected to the test tank (1) and the liquid storage tank (2) respectively, and the water level control component (6) can adjust the water level in the test tank (1) and the liquid storage tank (2); the water bath (8) can control the temperature of the solution therein.

2. According to claim 1, a multi-factor corrosion simulation test device suitable for offshore wind power cross-regional, characterized in that: The test tank (1), the multi-layer sample fixing frame (3) and the cover plate (7) can form a free disassembly and assembly mode, and can also be made into an integral structure.

3. According to claim 1, a multi-factor corrosion simulation test device suitable for offshore wind power cross-regional, characterized in that: The multi-layer sample fixing frame (3) is provided with five layers, which correspond to the seawater full immersion area, the low tidal range area, the medium tidal range area, the high tidal range area and the ocean atmosphere area from bottom to top.

4. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 1 is characterized in that: The solution atomizing assembly (5) has a function of controlling the atomizing speed, so as to adjust and control the humidity above the solution in the test tank (1); the solution atomizing assembly (5) is connected to the test tank (1) via a rubber hose, and maintains air pressure balance with the help of the through holes on the side wall of the test tank (1).

5. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 1 is characterized in that: The temperature and humidity sensor (4) is connected to the cover plate (7) and is sealed, and is capable of displaying temperature and humidity information in real time and recording it at a fixed period.

6. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 1 is characterized in that: The water level control component (6) is connected to the test tank (1) and the liquid storage tank (2) at the same time, the connection is sealed, and it is capable of driving the solution in the tank to flow freely between the test tank (1) and the liquid storage tank (2) at a fixed time, so as to adjust the water level height in the test tank (1).

7. A test method for multi-factor corrosion simulation of offshore wind power cross-regions using a test device as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Experimental preparation stage: processing samples; Add the required solution into the test tank (1), connect the test tank (1) and the liquid storage tank (2) via the water level control component (6), and adjust all the solution into the liquid storage tank (2); S2: Experiment start stage: fix the sample on the multi-layer sample fixing frame (3), start the water level control component (6) to inject the solution in the liquid storage tank (2) into the test tank (1), simulating the full immersion area and tidal range area of ​​the marine environment; After the solution in the test tank (1) reaches the set maximum liquid level, the solution atomization assembly (5) and the water bath (8) are turned on, and the atomization rate and the temperature in the tank are adjusted according to the temperature and humidity required for the test; S3: Observe the change in the reading of the temperature and humidity sensor (4) above the test tank (1), and start timing after the working parameters in the tank are stable; at the same time, turn on the water level control component (6) to adjust the water level in the test tank (1) at a set frequency to achieve a fixed frequency water level cycle; S4: Conduct the experiment according to the number of cycles required by the experiment. After the experiment, turn off the solution atomization component (5) and the water level control component (6), open the upper cover (7), take out the sample, dry it, clean it, blow it dry, and weigh it. Calculate the weight loss per unit area based on the weight loss before and after the test, and measure the surface corrosion to evaluate the corrosion resistance and corrosion risk of the material in different marine areas; S5: Confirm that the test is completed, drain the solution in the test tank (1) and the liquid storage tank (2), and clean the equipment.

8. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 7 is characterized in that: In S1, a sample of the tower material to be tested is processed, the sample is polished with sandpaper and weighed.

9. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 7 is characterized in that: In S4, the sample was acid washed and then cleaned with deionized water and alcohol, respectively.

10. The cross-regional multi-factor corrosion simulation test device suitable for offshore wind power according to claim 7, characterized in that: In S4, the measured surface corrosion conditions include the maximum corrosion depth parameter.

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