A device and method for measuring corrosion potential in tidal range areas

Abstract

The present invention provides a device and method for measuring corrosion potential in a tidal range zone. The device includes a data collector and a test tube. A first float, an electromagnet, a first limiting rod, a second limiting rod, and a reference electrode are provided in the test tube. A first through-slot and a second through-slot are symmetrically provided on the wall of the test tube. Multiple baffles are distributed in the first through-slot and the second through-slot. One end of the first float is connected to the electromagnet and the other end is connected to the reference electrode. One end of the first limiting rod is a first connecting end and the other end is a first free end. The first connecting end is rotatably connected to the left end of the electromagnet. One end of the second limiting rod is a second connecting end and the other end is a second free end. The second connecting end is rotatably connected to the right end of the electromagnet. When the electromagnet is energized, the first free end and the second free end are magnetically attracted to the left and right ends of the electromagnet, respectively. When the electromagnet is de-energized, the first free end extends into the first through-slot and is blocked by the baffle, while the second free end extends into the second through-slot and is blocked by the baffle. The present invention utilizes the coordinated action of a first float, an electromagnet, a first limiting rod, a second limiting rod, and a baffle to adjust the height of the reference electrode. The reference electrode stops moving when it reaches the test position, triggering a connection between the reference electrode and the test position to form a conductive circuit, enabling automatic monitoring of the corrosion potential at different heights of the sample being tested in the tidal range. By controlling the on and off states of the electromagnet, automatic potential measurement at different heights is achieved in a smart way, tailored to the ebb and flow of the seawater.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion potential measurement, and in particular to a device and method for measuring corrosion potential in a tidal range area. Background Art

[0002] The tidal range zone is the area of ​​seawater between the average low tide and the average high tide. The tidal range is long and varies greatly in height. During high tide, metal components are subject to the combined effects of waves and seawater. During low tide, salt deposits form on the metal surfaces during the drying process or they are covered by a supersaturated seawater film, creating a harsh corrosive environment. Electrochemical and chemical coatings are less effective, making corrosion protection of metal components in tidal range zones difficult. Research on the corrosion and protection of metal materials and their components in tidal range zones is of great practical significance.

[0003] The study of the corrosion behavior of metal materials and their components in tidal ranges mainly relies on weight loss and electrochemical methods. The electrochemical method measures the corrosion potential of metal materials in seawater versus time to obtain the law of corrosion potential changes in seawater. Tidal potential measurements are usually performed using a multimeter or potential acquisition device and a reference electrode. The reference electrode is placed at the same level as the test location and close to it. The tester needs to wait for the seawater tide to submerge the test location, at which point the test location and the reference electrode form a conductive circuit before testing can be performed. This process has the problems of long waiting times and waste of labor.

[0004] CN116840139A discloses a method, device, and electronic device for measuring the corrosion potential of offshore steel structures. The corrosion potential measurement system includes a controller, a telescopic device connected to the controller, a measuring instrument, and a reference electrode connected to the measuring instrument. The fixed end of the telescopic device is disposed near the side surface of the offshore steel structure, and the reference electrode is disposed at the telescopic end of the telescopic device. During the measurement process, the controller controls the telescopic end of the telescopic device to begin extending in response to a measurement condition being triggered. Further, the controller controls the measuring instrument to measure the corrosion potential of the offshore steel structure in seawater in response to the telescopic end reaching a preset length. When the telescopic end reaches the preset length, the reference electrode is located below the sea surface. The corrosion potential measurement system can be used to automatically test the corrosion potential of the offshore steel structure without requiring an operator to carry the corrosion potential measuring instrument underwater. However, the extension of the telescopic end below the sea surface requires a measurement condition to be triggered, such as reaching the corrosion potential measurement time interval set in the controller or a triggering operation by the operator, and the position of the reference electrode cannot be automatically adjusted according to the ebb and flow of the seawater. Summary of the Invention

[0005] In view of this, the present invention aims to propose a device and method for measuring corrosion potential in a tidal range area, so as to solve the problem that automatic monitoring of rising and falling tides cannot be achieved when measuring corrosion potential in a tidal range area.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] On the one hand, the present invention proposes a tidal range zone corrosion potential measuring device for detecting the potential at different positions of a sample to be measured, the measuring device comprising a data collector and a test tube, wherein a first float, an electromagnet, a first limit rod, a second limit rod and a reference electrode are arranged in the test tube, a first through groove and a second through groove are symmetrically provided on the wall of the test tube, a plurality of baffles are distributed in the first through groove and the second through groove, one end of the first float is connected to the electromagnet, and the other end is connected to the reference electrode, one end of the first limit rod is a first connecting end and the other end is a first free end, the first connecting end is rotatably connected to the left end of the electromagnet, one end of the second limit rod is a second connecting end and the other end is a second free end, the second connecting end is rotatably connected to the right end of the electromagnet, when the electromagnet is energized, the first free end and the second free end are magnetically attracted to the left and right ends of the electromagnet respectively, when the electromagnet is de-energized, the first free end extends into the first through groove and is blocked by the baffle, and the second free end extends into the second through groove and is blocked by the baffle. The present invention utilizes the coordinated action of a first float, an electromagnet, a first limiting rod, a second limiting rod, and a baffle to adjust the height of the reference electrode. The reference electrode stops moving when it reaches the test position of the sample, triggering a connection between the reference electrode and the test position to form a conductive circuit, enabling automatic monitoring of the corrosion potential at different heights of the sample in the tidal range. By controlling the on and off states of the electromagnet, automatic potential measurement at different heights of the sample can be achieved based on the ebb and flow of the tide.

[0008] Furthermore, the sample to be tested is sequentially provided with a plurality of test positions in the height direction, each test position is respectively connected to a data collector, a plurality of first sensors are correspondingly provided on the test tube, the first sensors are flush with the corresponding test positions, each first sensor is respectively connected to a data collector, a second sensor is provided on the first float, and the data collector is electrically connected to a reference electrode. When the position of the first float changes and reaches any first sensor, after the second sensor senses the signal from the first sensor, on the one hand, it sends a signal to control the electromagnet to cut off the power so that the reference electrode position is fixed. At this time, the reference electrode and the corresponding test position are at the same height, and on the other hand, it sends a signal to control the circuit connected to the test position flush with the first sensor and the data collector, and the test position and the reference electrode form a conductive loop. The data collector records the potential of this test position. After the recording is completed, the second sensor sends a signal to control the electromagnet to turn on the power, and the first float and the reference electrode continue to move.

[0009] Furthermore, the test tube includes a mounting hole and a second float, the mounting hole is connected to an external mounting part and is used to limit the test tube in the up and down directions, and the second float is sleeved on the outer circumference of the test tube and is used to limit the test tube in the left and right directions.

[0010] Furthermore, protrusions are respectively provided at the left and right ends of the first float, and the protrusions are respectively inserted into the first through groove and the second through groove, so as to ensure that the first float can move within the track formed by the first through groove and the second through groove, and prevent the first float from deflecting when moving.

[0011] Furthermore, the first sensor and the test tube are detachably connected, so as to facilitate reasonable setting of the distribution position of the first sensor according to different samples to be tested.

[0012] On the other hand, the present invention also provides a method for measuring corrosion potential in a tidal range area, using the above-mentioned tidal range area corrosion potential measuring device, the measurement method comprises the following steps:

[0013] Step 1: Fix a test tube near the sample to be tested, so that all test positions are exposed to the water surface at low tide. Install multiple first sensors on the test tube, with each first sensor corresponding to a test position of the sample to be tested and the corresponding first sensors being aligned with each other. The test positions are electrically connected to a data collector via wires, and the first sensors are electrically connected to the data collector via wires.

[0014] Step 2: The first float of the test tube drives the reference electrode to move with the seawater to determine whether the first float reaches any first sensor;

[0015] Step 3: If not, return to step 2; if so, the electromagnet is powered off, the first limiting rod extends into the first through slot, the second limiting rod extends into the second through slot, and the baffle blocks the first float from continuing to move;

[0016] Step 4: Power is applied to the wire connecting the first sensor and the data collector. At the same time, power is applied to the wire connecting the test position flush with the first sensor and the data collector. The data collector collects and records the potential of the test position.

[0017] Step 5: After the data collector completes recording, the electromagnet is energized, the first limit rod and the second limit rod are separated from the through slot and adsorbed to the electromagnet, the first float continues to move, and returns to step 2 to perform the potential test of the next test position.

[0018] Furthermore, in step three, the electromagnet is powered off for 1 to 30 minutes, so that the first float stays for a period of time, so that the sample under test has a certain amount of time to be polarized before the potential test is performed, thereby ensuring the accuracy of the test.

[0019] Furthermore, in step 3, the time it takes for the first and second limit rods to extend into the through slot and be blocked by the baffle is less than 10 seconds. This facilitates the rapid insertion of the first and second limit rods into the through slot upon receiving a power-off signal from the electromagnet to lock the first float in place, thereby preventing the first float from moving to the next test position and missing the potential measurement at that test position.

[0020] Furthermore, in step five, the time for the first limiting rod and the second limiting rod to disengage from the through slot is less than 15 seconds, so as to avoid affecting the movement of the first float to the next test position.

[0021] Compared with the existing technology, the device and method for measuring corrosion potential in a tidal range zone described in the present invention have the following advantages:

[0022] (1) The first float moves up and down under the action of seawater, and drives the reference electrode to move to change its height. Through the coordinated action of the electromagnet, the first limit rod, the second limit rod and the baffle, the reference electrode stops moving when it reaches the test position of the sample to be tested, triggering the reference electrode and the test position to connect to form a conductive circuit, thereby realizing automatic monitoring of the corrosion potential of the sample at different heights in the tidal range area.

[0023] (2) When a corrosion potential test is required, the electromagnet is powered off and demagnetized, and the first and second limit rods are opened and inserted into the through slot and blocked by the baffle, so that the reference electrode is fixed in position, facilitating potential measurement. After the measurement is completed, the electromagnet is powered on and becomes magnetic, and the first and second limit rods are separated from the baffle and magnetically attracted to the electromagnet. The first float and the reference electrode continue to move unimpeded, and the potential measurement of the next test position is performed.

[0024] (3) When conducting corrosion potential test, control the electromagnet power-off time to be 1 to 30 minutes, and make the first float stay for a period of time, so that the sample under test has a certain time to be polarized before the potential test is carried out to ensure the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 Schematic diagram of the structure of the test tube according to the present invention;

[0027] Figure 2 is a top view of the test tube according to the present invention;

[0028] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0029] Figure 4 for Figure 2 Cross-sectional view in the BB direction;

[0030] Figure 5 Schematic diagram of position changes of the first limiting rod and the second limiting rod when the electromagnet is in different states of power off and power on;

[0031] Figure 6 Schematic diagram of the measuring device according to the present invention.

[0032] Description of reference numerals:

[0033] 1. Data collector; 2. Test tube; 3. First float; 4. Electromagnet; 5. First limit rod; 6. Second limit rod; 7. Reference electrode; 8. First through slot; 9. Second through slot; 10. Baffle; 11. First sensor; 12. Test position; 13. Mounting hole; 14. Second float; 15. Protrusion. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with specific embodiments. It should be noted that the data in the following experimental examples are obtained by the inventor through a large number of experiments. Due to space limitations, only a portion thereof is shown in the specification, and those skilled in the art can understand and implement the present invention under these data. These embodiments are merely intended to illustrate the present invention and are not intended to limit the scope of the present invention. It should also be understood that, after having read the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these changes or modifications also fall within the scope protected by this application.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0037] A device for measuring corrosion potential in tidal range areas is used to detect the potential at different locations of the sample being tested, such as Figures 1 to 6As shown, the measuring device includes a data collector 1 and a test tube 2, in which a first float 3, an electromagnet 4, a first limiting rod 5, a second limiting rod 6 and a reference electrode 7 are arranged, and a first through groove 8 and a second through groove 9 are symmetrically provided on the wall of the test tube 2, and a plurality of baffles 10 are distributed in the first through groove 8 and the second through groove 9, one end of the first float 3 is connected to the electromagnet 4, and the other end is connected to the reference electrode 7, one end of the first limiting rod 5 is a first connecting end and the other end is a first free end, the first connecting end is rotatably connected to the left end of the electromagnet 4, one end of the second limiting rod 6 is a second connecting end and the other end is a second free end, the second connecting end is rotatably connected to the right end of the electromagnet 4, when the electromagnet 4 is energized, the first free end and the second free end are magnetically attracted to the left and right ends of the electromagnet 4 respectively, and when the electromagnet 4 is de-energized, the first free end extends into the first through groove 8 and is blocked by the baffle 10, and the second free end extends into the second through groove 9 and is blocked by the baffle 10.

[0038] The present invention can change the height of the reference electrode 7 through the coordinated action of the first float 3, the electromagnet 4, the first limiting rod 5, the second limiting rod 6 and the baffle 10, and can make the reference electrode 7 stop moving when it reaches the test position 12 of the sample to be tested, triggering the reference electrode 7 and the test position 12 to connect to form a conductive circuit, thereby realizing automatic monitoring of the corrosion potential of the sample at different heights in the tidal range. The first float 3 can move up and down under the action of seawater, thereby driving the movement of the reference electrode 7 connected to it. When it is necessary to perform a corrosion potential test, the electromagnet 4 is controlled to be powered off and demagnetized, and the first limiting rod 5 and the second limiting rod 6 are respectively inserted into the first through slot 8 and the second through slot 9 and blocked by the baffle 10, so that the reference electrode 7 is fixed in position, facilitating the measurement of the potential. After the measurement is completed, the electromagnet 4 is controlled to be powered on and magnetic, and the first limiting rod 5 and the second limiting rod 6 are separated from the baffle 10 and magnetically attracted to the electromagnet 4. The first float 3 and the reference electrode 7 continue to move unimpeded, and the potential measurement of the next test position 12 is performed. By controlling the on and off state of the electromagnet 4, the potential of the sample to be tested at different heights can be automatically measured according to the ebb and flow of the seawater.

[0039] In order to ensure that the first limiting rod 5 and the second limiting rod 6 can be magnetically attracted to the electromagnet 4, the first limiting rod 5 and the second limiting rod 6 are made of magnetic material. The reference electrode 7 is arranged in the test tube 2 to reduce the impact of the waves on the reference electrode 7. The reference electrode 7 moves up and down in the sea water with the first float 3 as the tide rises and falls. The reference electrode 7 can be connected to the first float 3 by bonding. The first float 3 is preferably made of plastic material, and the floating speed of the first float 3 is ensured to be less than 1 cm / s, so as to give the first limiting rod 5 and the second limiting rod 6 sufficient reaction time.

[0040] Specific to this application Figure 5In the embodiment, the baffle 10 is a sawtooth formed in the first through groove 8 and the second through groove 9. When manufacturing the test tube 2, the sawtooth can be directly arranged in the first through groove 8 and the second through groove 9 in a sequentially distributed manner, which is convenient for processing and manufacturing.

[0041] Further, such as Figure 6 As shown, the sample under test is sequentially provided with multiple test positions 12 in the height direction, each test position 12 is respectively connected to the data collector 1, the test tube 2 is correspondingly provided with multiple first sensors 11, the first sensors 11 are flush with the corresponding test positions 12, each first sensor 11 is respectively connected to the data collector 1, the first float 3 is provided with a second sensor, and the data collector 1 is electrically connected to the reference electrode 7. Specifically, the multiple first sensors 11 are connected in parallel, and the test positions 12 are connected in parallel. When the first float 3 moves to the test position 12, the first sensors 11 at the corresponding positions and the test position 12 are connected to the data collector 1, and participate in forming a conductive loop. When the position of the first float 3 changes and reaches any of the first sensors 11, the second sensor senses the signal from the first sensor 11. On the one hand, it sends a signal to control the electromagnet 4 to cut off the power, so that the reference electrode 7 is fixed. At this time, the reference electrode 7 and the corresponding test position 12 are at the same height. On the other hand, it sends a signal to control the circuit connected to the test position 12 flush with the first sensor 11 and the data collector 1 to be connected, and the test position 12 and the reference electrode 7 form a conductive loop. The data collector 1 records the potential of this test position 12. After the recording is completed, the second sensor sends a signal to control the electromagnet 4 to be energized, and the first float 3 and the reference electrode 7 continue to move.

[0042] As a preferred example of the present invention, the corrosion potential measuring device includes a proximity sensor switch, which is used to enable the second sensor to move with the first float 3 to the position closest to the test position 12, and the proximity sensor switch to sense and realize the conduction of the circuit where the test position 12 is located. The closest position described in the present invention means that the first float 3 and the test position 12 are in a flush state, and the distance between the two is the closest. When the reference electrode 7 moves with the first float 3 to the position closest to any test position 12, the proximity sensor switch can trigger the connection of the circuit where the corresponding test position 12 is located to complete the potential test of the test position 12, which can realize testing at different heights and reduce the time and cost of manual waiting for high tide to perform measurements.

[0043] To improve the stability of the test tube 2 and prevent it from moving due to the impact of seawater, which could affect test accuracy, the test tube 2 includes a mounting hole 13 and a second float 14. The mounting hole 13 connects to an external mounting member and limits the vertical position of the test tube 2. The second float 14 is mounted on the outer circumference of the test tube 2 and limits the horizontal position of the test tube 2. The interaction between the mounting hole 13 and the second float 14 effectively prevents the test tube 2 from shifting.

[0044] The left and right ends of the first float 3 are respectively provided with protrusions 15, which are respectively inserted into the first through groove 8 and the second through groove 9. This ensures that the first float 3 can move within the track formed by the first through groove 8 and the second through groove 9, and prevents the first float 3 from deflecting when moving.

[0045] Furthermore, the first sensor 11 and the test tube 2 are detachably connected, facilitating the proper placement of the first sensor 11 according to the sample being tested. A scale is provided at the connection between the test tube 2 and the first sensor 11 to facilitate identification of the position of the first sensor 11. Furthermore, the first sensor 11 and the test tube 2 are connected by screws.

[0046] A method for measuring corrosion potential in a tidal range area according to the present invention comprises the following steps:

[0047] Step 1: Fix the test tube 2 near the sample to be tested, and at low tide, all test locations 12 are exposed to the water surface. A plurality of first sensors 11 are provided on the test tube 2, each first sensor 11 corresponding to a test location 12 of the sample to be tested, and the corresponding first sensors 11 are aligned with each other in height. The test locations 12 are electrically connected to the data collector 1 via wires, and the first sensors 11 are electrically connected to the data collector 1 via wires.

[0048] Specifically, in step 1, the distance between the test tube 2 and the sample to be tested is no more than 0.5 m to ensure measurement accuracy and to help reduce the length of the wire.

[0049] Step 2: The first float 3 of the test tube 2 drives the reference electrode 7 to move with the seawater to determine whether the first float 3 reaches any first sensor 11;

[0050] Step 3: If no, return to step 2; if yes, the electromagnet 4 is powered off, the first limiting rod 5 extends into the first through slot 8, the second limiting rod 6 extends into the second through slot 9, and the baffle 10 blocks the first float 3 from continuing to move;

[0051] Specifically, in step three, when the position of the first float 3 changes and reaches any of the first sensors 11, the second sensor senses the signal from the first sensor 11 and sends a signal to control the electromagnet 4 to cut off the power. The time it takes for the first limit rod 5 and the second limit rod 6 to extend into the through slot and be blocked by the baffle 10 is less than 10 seconds. This facilitates the first limit rod 5 and the second limit rod 6 to quickly extend into the through slot after receiving the power-off signal of the electromagnet 4 to lock the position of the first float 3, thereby preventing the first float 3 from moving to the next test position 12 and missing the potential measurement of this test position 12.

[0052] Step 4: The wire connecting the first sensor 11 and the data collector 1 is energized. At the same time, the wire connecting the test position 12 at the same height as the first sensor 11 and the data collector 1 is energized. The data collector 1 collects and records the potential of the test position 12.

[0053] Specifically, in step four, since the first float 3 drives the reference electrode 7 to reach any first sensor 11, at this time, the first float 3 is closest to the test position 12 flush with this first sensor 11, so the wire connecting this test position 12 and the data collector 1 is triggered to energize to detect the potential of this test position 12.

[0054] Step five, after the data collector 1 completes recording, the electromagnet 4 is energized, the first limit rod 5 and the second limit rod 6 are separated from the through slot and adsorbed to the electromagnet 4, the first float 3 continues to move, and returns to step two to perform the potential test of the next test position 12.

[0055] Specifically, in step five, the time for the first limiting rod 5 and the second limiting rod 6 to disengage from the through slot is less than 15 seconds, so as to avoid affecting the movement of the first float 3 to the next test position 12.

[0056] As a preferred example of the present invention, in the step three, the power-off time of the electromagnet 4 is 1 to 30 minutes, so that the first float 3 stays for a period of time, so that the sample to be tested has a certain amount of time to be polarized before the potential test is carried out, thereby ensuring the accuracy of the test. The present invention utilizes the electromagnet 4, the first limiting rod 5, the second limiting rod 6 and the baffle 10, which can not only control the movement and position fixation of the reference electrode 7, but also control the residence time of the reference electrode 7. Furthermore, when the sample to be tested is a non-corrosion-resistant metal such as carbon steel or low-alloy steel, the power-off time of the electromagnet 4 is set to 1 to 5 minutes. When the sample to be tested is a corrosion-resistant metal such as stainless steel, titanium alloy, or 5-series aluminum alloy, the power-off time of the electromagnet 4 is set to 15 to 30 minutes. The data collector 1 of the present invention can be used as a controller to control the power-off time of the electromagnet 4. In addition, the data collector 1 can be used as a controller to control the process of the entire measuring device when performing measurements.

[0057] The tidal zone corrosion potential measurement device and measurement method of the present invention can realize the corrosion potential measurement of different metals or the same metal at different vertical positions in the tidal zone, and can also be used to measure the open circuit potential of other materials. The present invention sets a test position 12 on the sample to be tested. When the reference electrode 7 moves to the corresponding height with the first float 3, the electromagnet 4 is triggered to be powered off and the test position 12 and the data collector 1 are powered on, completing the potential test of the test position 12. It can realize the test of the test position 12 at different heights, thereby reducing the time and cost of manual measurement when waiting for high tide and realizing automatic data collection.

[0058] The device for measuring corrosion potential in a tidal range zone of the present invention further includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and executed by the processor, the measurement method is implemented. Furthermore, the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is read and executed by the processor, the measurement method is implemented.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for measuring corrosion potential in a tidal range area, used to detect the potential at different locations of a sample being tested, characterized in that: The measuring device comprises a data collector (1) and a test tube (2); a first float (3), an electromagnet (4), a first limiting rod (5), a second limiting rod (6) and a reference electrode (7) are arranged in the test tube (2); a first through groove (8) and a second through groove (9) are symmetrically provided on the wall of the test tube (2); a plurality of baffles (10) are distributed in the first through groove (8) and the second through groove (9); one end of the first float (3) is connected to the electromagnet (4), and the other end is connected to the reference electrode (7); one end of the first limiting rod (5) is The other end of the first connection end is a first free end, and the first connection end is rotatably connected to the left end of the electromagnet (4). One end of the second limiting rod (6) is the second connection end, and the other end is the second free end. The second connection end is rotatably connected to the right end of the electromagnet (4). When the electromagnet (4) is powered on, the first free end and the second free end are magnetically attracted to the left and right ends of the electromagnet (4) respectively. When the electromagnet (4) is powered off, the first free end extends into the first through slot (8) and is blocked by the baffle (10), and the second free end extends into the second through slot (9) and is blocked by the baffle (10).

2. The tidal range area corrosion potential measuring device according to claim 1, characterized in that: The sample to be tested is provided with a plurality of test positions (12) in sequence in the height direction, each test position (12) is respectively connected to a data collector (1), the test tube (2) is provided with a plurality of first sensors (11) correspondingly, the first sensors (11) are flush with the corresponding test positions (12), each first sensor (11) is respectively connected to a data collector (1), the first float (3) is provided with a second sensor, and the data collector (1) is electrically connected to a reference electrode (7).

3. The device for measuring corrosion potential in tidal range area according to claim 1, characterized in that: The test tube (2) comprises a mounting hole (13) and a second float (14), wherein the mounting hole (13) is connected to an external mounting component, and the second float (14) is sleeved on the outer circumference of the test tube (2).

4. The device for measuring corrosion potential in tidal range area according to claim 1, characterized in that: Protrusions (15) are respectively provided at the left and right ends of the first float (3), and the protrusions (15) are respectively inserted into the first through groove (8) and the second through groove (9).

5. The device for measuring corrosion potential in tidal range area according to claim 2, characterized in that: The first sensor (11) and the test tube (2) are detachably connected.

6. A method for measuring corrosion potential in tidal range areas, characterized in that: The device for measuring corrosion potential in a tidal range zone according to any one of claims 1 to 5 is used, and the measuring method comprises the following steps: Step 1: Fix the test tube (2) near the sample to be tested, and all test positions (12) are exposed to the water surface at low tide; set a plurality of first sensors (11) on the test tube (2); each first sensor (11) corresponds to a test position (12) of the sample to be tested, and the corresponding two are aligned in height; the test position (12) is electrically connected to the data collector (1) via a wire; and the first sensor (11) is electrically connected to the data collector (1) via a wire; Step 2: The first float (3) of the test tube (2) drives the reference electrode (7) to move with the seawater, and determines whether the first float (3) reaches any first sensor (11); Step 3: If not, return to step 2; if yes, the electromagnet (4) is powered off, the first limiting rod (5) extends into the first through slot (8), the second limiting rod (6) extends into the second through slot (9), and the baffle (10) blocks the first float (3) from continuing to move; Step 4: The wire connecting the first sensor (11) and the data collector (1) is energized. At the same time, the wire connecting the test position (12) at the same height as the first sensor (11) and the data collector (1) is energized, and the data collector collects and records the potential of the test position (12); In step five, the data collector (1) completes recording, the electromagnet (4) is energized, the first limit rod (5) and the second limit rod (6) are separated from the through slot and adsorbed onto the electromagnet (4), the first float (3) continues to move, and returns to step two to perform a potential test at the next test position (12).

7. The method for measuring corrosion potential in tidal range area according to claim 6, characterized in that: In the step 3, the electromagnet (4) is powered off for 1 to 30 minutes, so that the first float (3) stays for a period of time.

8. The method for measuring corrosion potential in tidal range area according to claim 6, characterized in that: In step three, the time it takes for the first limiting rod (5) and the second limiting rod (6) to extend into the through slot and be blocked by the baffle (10) is less than 10 seconds.

9. The method for measuring corrosion potential in tidal range area according to claim 6, characterized in that: In step five, the time for the first limiting rod (5) and the second limiting rod (6) to separate from the through slot is less than 15 seconds.

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