Detection equipment for marine corrosion primary process

Abstract

The invention relates to detection equipment for a marine corrosion primary process, which comprises a laser generating device for exciting a first laser beam and a second laser beam, the first laser beam serving as detection laser passes through a pipeline, a first vacuum chamber and a second vacuum chamber and then enters a sample mechanism; the sample mechanism comprises a sample box, a detection interface, an excitation interface and a detection port are formed in the sample box, the detection port is communicated with a detector, a vacuumizing device is arranged at the upper end of the sample box, and a water storage device is arranged in the center of the inner bottom of the sample box; the sample box is internally provided with a sample loading device which is used for mounting a sample plate and enabling the sample plate to lift and overturn, a water storage device is arranged in the sample mechanism, and the sample loading device which can be overturned and lifted is matched, so that simulation or soaking of the sample plate in the sample mechanism can be realized, and a better marine corrosion primary process detection effect can be realized.

Description

Technical Field

[0001] The present invention relates to the field of laser detection, and particularly to a detection device for the primary process of marine corrosion. Background Art

[0002] Relative to the external environment, a smooth metal surface is usually in a thermodynamically metastable state. Once in contact with an environmental solution, a corrosion-self-healing process on the picosecond time scale occurs on the metal surface. The surface metal atoms are stripped from the substrate to form metal ions, resulting in corrosion, while the formation of surface compounds and the evolution of oxides trigger the self-healing process on the metal surface. The density of the metal surface oxide and its bonding strength with the metal substrate determine the rate of the metal corrosion process. A dense oxide surface film can form an isolation zone between the metal substrate and the solution environment, alleviating or even preventing the re-corrosion of the metal, that is, the self-healing process on the metal surface.

[0003] Therefore, the prevention of the metal corrosion process and the intervention in the surface self-healing process are the keys to alleviating or even preventing the metal re-corrosion process, and also the entry points for in-depth exploration of corrosion mechanisms such as stress corrosion, pitting corrosion, hydrogen embrittlement corrosion, and crevice corrosion. A large amount of data shows that the corrosion of metals will form serious safety hazards and cause huge economic losses. Therefore, studying the changes at the solid / liquid interface during the metal corrosion-self-healing process has very important scientific significance and economic value.

[0004] However, limited by the development of research technical means, there are not many in-situ research reports on the changes at the solid / liquid interface during the metal corrosion-self-healing process at present. Commonly used surface technology research means such as X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), etc. need to be carried out in a high-vacuum environment, and it is very difficult to carry out in-situ experiments. For more common Raman spectroscopy, due to the need for signal enhancement, high selectivity of the research system, and low time resolution (milliseconds, ms), it limits the application of this technology in the study of the changes at the solid / liquid interface during the metal corrosion-self-healing process. Femtosecond sum-frequency generation spectroscopy (FS-SFG) with high spatio-temporal resolution is difficult to capture the reaction signals of the changes at the solid / liquid interface during the metal corrosion-self-healing process due to its narrow vibrational sensitivity of atomic pairs. In recent years, ambient pressure X-ray photoelectron spectroscopy (AP-XPS), X-ray standing wave + X-ray photoelectron spectroscopy (SWAPPS), and white light X-ray absorption spectroscopy (DXAFS) have realized the in-situ detection of the changes at the solid / liquid interface process, but these methods need to rely on large synchrotron radiation devices and it is very difficult to carry out ultrafast in-situ detection. Therefore, it is extremely urgent to develop experimental technical means that can in-situ detect the changes at the solid / liquid interface during the metal corrosion-self-healing process on an ultrafast time scale (fs).

[0005] Ultra-high spatio-temporal resolution technology: femtosecond pump-probe technology---A femtosecond pulsed laser beam is used as the pump laser to excite the material, and another pulsed laser beam is used as the probe light. After passing through the area irradiated by the pump laser on the target material, it enters the imaging or receiving device; among them, the time when the probe light passes through the target material is later than the time when the pump light reaches the target material, enabling the detection of ultrafast phenomena.

[0006] Currently, all samples are soaked in the marine environment outside the sample mechanism and then placed into the sample mechanism for detection in combination with the femtosecond pump-probe technology. However, in this case, there will still be a certain impact on the original detection of marine corrosion. Therefore, there is an urgent need to design a detection device that can complete the seawater soaking of samples in the sample mechanism. Summary of the Invention

[0007] The purpose of the present invention is to provide a detection device for the original process of marine corrosion. A water storage device is arranged inside the sample mechanism and is combined with a sample loading device that can be flipped and lifted, enabling the simulation or soaking of the sample plate inside the sample mechanism, thus achieving a better detection effect for the original process of marine corrosion.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is: A detection device for the original process of marine corrosion includes a laser generating device for exciting the first laser beam and the second laser beam. The first laser beam is used as the detection laser and is incident into the sample mechanism after passing through the pipeline, the first vacuum chamber, and the second vacuum chamber. The second laser beam is used as the excitation laser and is incident into the sample mechanism through the pipeline. The sample mechanism includes a sample box, on which a detection interface, an excitation interface, and a detection port are opened. The detection port is connected to a detector. A vacuum pumping device is arranged at the upper end of the sample box, a water storage device is arranged at the center of the inner bottom, and a sample loading device for installing the sample plate and enabling the sample plate to be lifted and flipped is also arranged inside the sample box. The sample plate on the sample loading device can be pressed into the water storage device to complete the simulated seawater soaking.

[0009] Preferably, the water storage device includes a water storage tank arranged at the bottom of the sample box. Inside the water storage tank, there are at least a square cavity, a conical cavity, and a square cavity from bottom to top, and the size of the upper square cavity is the smallest. The upper square cavity is equipped with a sealing cover, and the sealing cover can move downward under the action of an external force, and the sealing cover is equipped with a reset structure.

[0010] Preferably, the reset structure is a reset spring arranged vertically inside the water storage tank.

[0011] Preferably, a vertically oriented guide rod is arranged at the inner bottom of the water storage tank. A guide sleeve is connected to the lower part of the sealing cover. A guide hole is opened at the lower part of the guide sleeve and is sleeved and matched with the guide rod through the guide hole. The guide rod is provided with a reset hole with an upper opening. The reset spring is installed in the reset hole, and the upper part of the reset spring is connected with a reset top block.

[0012] Preferably, the sample loading device includes two sample loading lifting pull rods arranged at the bottom of the sample box and symmetric about the water storage device. The sample loading lifting pull rods are connected to a sample loading motor base. A sample loading flipping motor is arranged on the sample loading motor base. The sample loading flipping motor is connected to a sample loading rotating shaft. And the two sample loading flipping transfers move synchronously. The two sample loading rotating shafts are coaxial and jointly connected to a sample loading plate. A sample loading rack for fixing the sample plate is installed on the sample loading plate.

[0013] Preferably, a sample loading rotating motor with a vertically upward rotating shaft is arranged on the sample loading plate. The sample loading rotating motor is connected to a sample loading rotating block. A sample loading screw rod is arranged on the sample loading rotating block. The sample loading rack is placed on the sample loading rotating block and is penetrated by the sample loading screw rod. A sample loading limit nut is installed at one end of the sample loading screw rod passing through the sample loading rack.

[0014] Preferably, no less than three sample loading jacks are opened at the lower part of the sample loading rack. Sample loading plug posts that are in clearance plug-in fit with the sample loading jacks are arranged on the sample loading rotating block. A rotating limit ring is opened at the lower part of the sample loading rotating block. A rotating limit rod that cooperates with the sample loading limit ring is arranged on the sample loading plate.

[0015] Preferably, two sample loading telescopic top rods that are vertically oriented and symmetric about the sample loading rotating motor are also arranged on the sample loading plate. The upper part of the sample loading telescopic top rod is arc-shaped.

[0016] Preferably, a wire hole is opened in the part of the sample loading plate where the sample loading rotating motor and the sample loading telescopic top rod are installed. The sample loading rotating shaft is a hollow shaft, and its middle hole part is communicated with the wire hole. And a wire harness outlet is opened at the cross section of one end of the sample loading rotating shaft close to the sample loading flipping motor.

[0017] The technical effects of the present invention are as follows: 1. A water storage device is arranged in the sample mechanism, and in cooperation with the sample loading device that can be flipped and lifted, the sample plate can be flipped and pressed into the water storage device to complete seawater immersion. In this way, simulated seawater corrosion can be completed in the sample mechanism, making the detection effect better.

[0018] 2. The design of the water storage device, through the shape design of its water storage tank, can ensure contact with seawater when the sample plate is pressed down, and at the same time maintain a sealed state when not immersed, so as to ensure that the simulated seawater therein is not affected by the vacuum environment in the sample box.

[0019] 3. The cooperative design of the guide rod and the guide sleeve, and the reset spring is placed in the guide rod. In this way, the sealing cover can maintain a relatively stable lifting track during the pressing down and resetting processes.

[0020] 4. The design of the sample loading rotating motor can realize the rotation of the sample plate, so that multiple-point primary detection of marine corrosion can be carried out.

[0021] 5. The design of the sample-loading telescopic ejector rod, in cooperation with the design of the sample-loading limit nut and the sample-loading screw rod, can appropriately adjust the angle of the sample plate, thereby achieving better primary ocean exploration. Moreover, through the design of the sample-loading insertion post, it is ensured that the sample-loading rack is driven to rotate by the sample-loading rotating block.

[0022] 6. The design of the wire holes inside the sample plate, in cooperation with the hollow design of the sample-loading rotating shaft, enables the wiring of the sample-loading telescopic ejector rod and the sample-loading rotating motor to be arranged inside the sample-loading rotating shaft, and then routed along the sample-loading lifting pull rod, avoiding the situation of wire harness entanglement during the flipping process and also not affecting the sample plate. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of a detection device for the primary process of ocean corrosion.

[0024] Figure 2 It is a cross-sectional view of the sample mechanism.

[0025] Figure 3 It is a schematic diagram of the sample-loading device and the water storage device.

[0026] Figure 4 It is a schematic diagram of the sample-loading part.

[0027] Figure 5 It is a schematic diagram of the matching part of the sample-loading rotating block and the sample-loading rack.

[0028] Figure 6 It is a schematic diagram of the water storage device.

[0029] Figure 7 It is a schematic diagram of the cooperation between the guide rod and the guide sleeve.

[0030] The text labels shown in the figure are as follows: 1. First laser beam; 2. Second laser beam; 3. First vacuum chamber; 4. Second vacuum chamber; 5. Sample mechanism; 6. Detector; 11. Sample box; 12. Detection interface; 13. Excitation interface; 14. Detection port; 15. Vacuum pumping device; 16. Water storage device; 17. Sample plate; 21. Sample-loading lifting pull rod; 22. Sample-loading motor base; 23. Sample-loading flipping motor; 24. Sample-loading rotating shaft; 25. Sample plate; 26. Sample-loading rotating motor; 27. Sample-loading rotating block; 28. Sample-loading rack; 29. Sample-loading screw rod; 30. Sample-loading limit nut; 31. Sample-loading insertion post; 32. Rotation limit rod; 33. Sample-loading telescopic ejector rod; 34. Wire hole; 35. Water storage tank; 36. Sealing cover; 37. Guide rod; 38. Guide sleeve; 39. Guide hole; 40. Return spring; 41. Return top block. Detailed Implementation Manner

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention. Example 1

[0032] As Figures 1-3 shown, a detection device for the primary process of marine corrosion includes a laser generating device for exciting a first laser beam 1 and a second laser beam 2. The first laser beam 1 is used as a detection laser and enters the sample mechanism 5 after passing through a pipeline, a first vacuum chamber, and a second vacuum chamber. The second laser beam 2 is used as an excitation laser and enters the sample mechanism 5 through a pipeline. The sample mechanism 5 includes a sample box 11, on which a detection interface 12, an excitation interface 13, and a detection port 14 are provided. The detection port 14 is connected to a detector 6. A vacuum pumping device 15 is provided at the upper end of the sample box 11, a water storage device 16 is provided at the center of the inner bottom, and a sample loading device for installing and lifting and flipping a sample plate 17 is also provided in the sample box 11. The sample plate 17 on the sample loading device can be pressed into the water storage device 16 to complete the simulation of seawater immersion.

[0033] The specific detection process of this embodiment is as follows: First, the sample plate 17 is installed on the sample loading device, and then the sample plate is driven by the sample loading device to flip 180 degrees and descend, so that the sample plate enters the water storage device 16 to complete the simulation of seawater immersion. Then, the sample plate is restored to its original position by the sample loading device, and then the sample mechanism is evacuated by the vacuum pumping device 15.

[0034] The laser generating device generates an ultrafast femtosecond laser with a repetition rate of 1 kHz, a single-pulse energy of 6 mJ, a pulse width of 35 fs, and a central wavelength of 800 nm through a pulse amplifier; The ultrafast femtosecond laser beam with a central wavelength of 800 nm and a pulse energy of 6 mJ is split. One beam of 2 mJ enters the vacuum chamber pipeline for transmission as the pulsed beam for detecting the primary process of marine corrosion, and the other beam of 4 mJ is transmitted outside the vacuum chamber as the pump pulse beam. The 800 nm, 2 mJ laser pulse entering the vacuum pipeline is focused into a gas chamber with a length of 40 cm filled with neon gas at a pressure of 75 Torr through a lens with a focal length of 70 cm, and interacts with the neon gas to generate high-order harmonics. The generated high-order harmonic wavelength is in the XUV band, and the photon energy range is 36 - 72 eV, and enters the first vacuum chamber for further transmission. The generated XUV-band high-order harmonic is used as the detection beam of the marine corrosion primary process detection system. The XUV-band detection beam enters the second vacuum chamber from the first vacuum chamber, and is focused onto the surface of the sample plate 17 in the sample box 11 through an annular mirror in the second vacuum chamber; The 4 mJ pump pulse beam transmitted outside the vacuum chamber is frequency-doubled by a BBO crystal to generate a 400 nm pump pulse laser, and this wavelength can produce transition resonance with the metal to be detected; Both the pump beam and the probe beam are incident on the sample plate 17 of the sample mechanism. The time when the probe light passes through the target material is later than the time when the pump light reaches the target material, and the incident angle of the XUV band probe beam on the sample is 80 - 84° relative to the surface normal. The beam size (FWHM) on the sample is 1.01 ± 0.02 mm and 0.137 ± 0.002 mm on the tangential axis and the sagittal axis respectively; the 400 nm pump beam is incident on the sample at an angle of 70° relative to the sample surface normal, and the pump area is 2.43 mm 2 , and then the pump beam is blocked, and only the probe beam is incident on the sample; Step Five: Use an aberration-corrected concave variable line spacing grating to spectroscopically disperse the XUV beam reflected from the sample and then enter the CCD detector (Detector 6). At the same time, collect the reflected pump beam to prevent any stray light from reaching the CCD detector; monitor the dynamic response of the sample after being excited by the pump light by measuring the changes in optical properties such as transmittance, reflectance, or absorption on the sample surface. Example 2

[0035] As Figure 3 and Figures 6-7 shown, since the sample mechanism is in a vacuum environment, the water storage device needs to be specifically designed as follows: The water storage device 16 includes a water storage tank 35 arranged at the bottom of the sample box 11. The water storage tank 35 at least has a square cavity, a conical cavity, and a square cavity from bottom to top, and the size of the upper square cavity is the smallest. The upper square cavity is fitted with a sealing cover 36, and the sealing cover 36 can move downward under the action of an external force. A vertically oriented guide rod 37 is provided at the inner bottom of the water storage tank 35. A guide sleeve 38 is connected to the lower part of the sealing cover 36. A guide hole 39 is opened in the lower part of the guide sleeve 38, and it is sleeved and fitted with the guide rod 37 through the guide hole. The guide rod 37 is provided with a reset hole with an upper opening, and a reset spring 40 is installed in the reset hole, and the upper part of the reset spring 40 is connected with a reset top block 41.

[0036] During the normal detection process, under the action of the return spring 40 and the return top block 41, the sealing cover 36 is in square fit with the upper part of the water storage tank 35 to seal the water storage tank. When it is necessary to soak the sample plate, the downward movement of the sample plate 17 will press down the sealing cover 36, which will further cause the guide sleeve 38 to descend along the guide rod 37. In this way, the return spring 40 can be in a compressed state. As the downward pressure continues, the sealing cover 36 will be pressed into the lower direction cavity of the water storage tank 35. In this way, the sample plate 17 will come into contact with the simulated seawater inside for seawater soaking. After completion, the sample plate 17 is returned to its original position through the sample loading device. Under the action of the return spring 40, the guide sleeve 38 is pushed up by the return top block 41, and then the sealing cover 36 is moved to the upper part of the water storage tank 35 to complete the sealing. In this way, only a small amount of water liquid will exist in the sample mechanism and water vapor will be formed (a small amount of water vapor generally does not affect the detection, and the water vapor can also be pumped away by a vacuum device to further eliminate the influence on the detection). Embodiment 3

[0037] As Figures 3-5 shown, in order to achieve better detection effects, multi-point detection is required, and at the same time, the angle of the laser incident on the sample plate should be finely adjusted. In this embodiment, the sample loading device is designed accordingly as follows: The sample loading device includes two sample loading lifting pull rods 21 arranged at the bottom of the sample box 11 and symmetric about the water storage device 16. The sample loading lifting pull rods 21 are connected with a sample loading motor base 22. A sample loading flipping motor 23 is arranged on the sample loading motor base 22. The sample loading flipping motor 23 is connected with a sample loading rotating shaft 24, and the two sample loading flipping transfers 23 move synchronously. The two sample loading rotating shafts 24 are coaxial and jointly connected with a sample loading plate 25. A sample loading rack 28 for fixing the sample plate 17 is installed on the sample loading plate 25. A sample loading rotating motor 26 with a vertically upward rotating shaft is arranged on the sample loading plate 25. The sample loading rotating motor 26 is connected with a sample loading rotating block 27. A sample loading screw rod 29 is arranged on the sample loading rotating block 27. The sample loading rack 28 is placed on the sample loading rotating block 27 and is penetrated by the sample loading screw rod 29. A sample loading limit nut 30 is installed at one end of the sample loading screw rod passing through the sample loading rack 28. No less than three sample loading jacks are opened at the lower part of the sample loading rack 28. Sample loading plug posts 31 which are in clearance plug-in fit with the sample loading jacks are arranged on the sample loading rotating block 27. A rotation limit ring is opened at the lower part of the sample loading rotating block 27. A rotation limit rod 32 which is matched with the rotation limit ring is arranged on the sample loading plate 25. Two sample loading telescopic top rods 33 which are vertically oriented and symmetric about the sample loading rotating motor 26 are also arranged on the sample loading plate 25. The upper part of the sample loading telescopic top rod 33 is arc-shaped.

[0038] The specific operations are as follows: First, install the sample plate 17 onto the sample carrier 28, then place the sample carrier 28 onto the sample rotating block 27 and let the sample carrier screw 29 pass through it. After that, install the limit nut 30 onto the sample carrier screw 29. The limit nut 30 does not lock the sample carrier 28, allowing the sample carrier 28 to have a vertical movement space of 5 - 10 mm. When seawater immersion is required, both sample carrier telescopic ejector rods 33 are in the extended state and hold the sample carrier 28 against the limit nut 30. Then, the sample carrier rotating shaft 24 can be rotated 180 degrees by two sample carrier flipping motors 23 (stepper motors with a step angle of 180 degrees), thereby driving the sample plate 25 and all the structures thereon to rotate 180 degrees. Then, through the synchronous operation of two sample carrier lifting pull rods 21, the whole is driven to descend, so that the sample plate 17 and the water storage device 16 complete the simulated seawater immersion.

[0039] After that, the sample carrier lifting pull rod 21 returns to its original position, and the sample carrier flipping motor 23 continues to step 180 degrees. In this way, the sample plate 17 will return to its original position. Then, both sample carrier telescopic ejector rods 33 return to their original positions, and the sample carrier 28 falls onto the sample rotating block 27. Then, the pump laser is used to detect the initial process of marine corrosion. After detecting one point, the sample rotating block 27 can be rotated by the sample carrier rotating motor 26, and then the sample carrier 28 is driven to rotate accordingly by the sample carrier insertion post 31. In this way, the initial detection of marine corrosion can be carried out on another point; similarly, by different extension amplitudes of the two sample carrier telescopic ejector rods 33, an angle can be formed between the sample carrier and the sample rotating block 27, so that the inclination angle of the sample plate 17 can be slightly changed, and the incident angle of the detection beam in the XUV band on the sample can be adjusted to be 80 - 84° relative to the surface normal. During multiple detections, in order to ensure better detection effects, the sample 17 can be immersed in seawater at regular intervals.

[0040] As Figure 5 shown, the part of the sample plate 25 where the sample carrier rotating motor 26 and the sample carrier telescopic ejector rod 33 are installed is provided with a wire hole 34. The sample carrier rotating shaft 24 is a hollow shaft, and its middle hole part is communicated with the wire hole 34. A wire harness outlet is provided at the cross-section of one end of the sample carrier rotating shaft 24 close to the sample carrier flipping motor 23.

[0041] The above design mainly considers the problem of the line connection of the rotating motor 26 and the telescopic ejector rod 33. All the lines pass through the wire hole 34 and the rotating shaft 24. In this way, during the flipping process, there will be no problem of wire harness entanglement and interference.

[0042] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device.

[0043] In this article, specific examples are used to illustrate the principles and implementation manners of the present invention. The descriptions of the above examples are only used to help understand the method and its core idea of the present invention. The above are only the preferred implementation manners of the present invention. It should be noted that due to the limited nature of written expression and objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A detection device for the initial process of marine corrosion, comprising a laser generating device for exciting a first laser beam and a second laser beam, characterized in that, The first laser beam enters the sample mechanism as a detection laser after passing through the pipeline, the first vacuum chamber, and the second vacuum chamber. The second laser beam enters the sample mechanism as an excitation laser through the pipeline. The sample mechanism includes a sample box, on which a detection interface, an excitation interface, and a detection port are opened. The detection port is connected to a detector. A vacuum pumping device is provided at the upper end of the sample box, a water storage device is provided at the center of the inner bottom, and a sample loading device for installing and lifting and flipping the sample plate is also provided in the sample box. The sample plate on the sample loading device can be pressed into the water storage device to complete the simulation of seawater immersion.

2. The detection device for the primary process of marine corrosion according to claim 1, wherein The water storage device includes a water storage tank provided at the bottom of the sample box. The water storage tank has at least a square cavity, a conical cavity, and a square cavity from bottom to top, and the upper square cavity has the smallest size. The upper square cavity is fitted with a sealing cover, and the sealing cover can move downward under the action of an external force, and the sealing cover is fitted with a reset structure.

3. The detection device for the primary process of marine corrosion according to claim 2, characterized in that, The reset structure is a reset spring installed vertically in the water storage tank.

4. The detection device for the primary process of marine corrosion according to claim 3, characterized in that, A vertically oriented guide rod is provided at the inner bottom of the water storage tank. A guide sleeve is connected to the lower part of the sealing cover. A guide hole is opened in the lower part of the guide sleeve, and the guide sleeve is sleeved with the guide rod through the guide hole. A reset hole with an upper opening is opened in the guide rod, and the reset spring is installed in the reset hole, and the upper part of the reset spring is connected with a reset top block.

5. A detection device for the primary process of marine corrosion according to any one of claims 1-4, characterized in that, The sample loading device includes two sample loading lifting pull rods provided at the bottom of the sample box and symmetric about the water storage device. The sample loading lifting pull rods are connected to a sample loading motor seat. A sample loading flipping motor is provided on the sample loading motor seat. The sample loading flipping motor is connected to a sample loading rotating shaft, and the two sample loading flipping transfer joints move synchronously. The two sample loading rotating shafts are coaxial and jointly connected to a sample loading plate, and a sample loading rack for fixing the sample plate is installed on the sample loading plate.

6. The detection device for the initial process of marine corrosion according to claim 5, characterized in that, A sample loading rotating motor with a vertically upward rotating shaft is provided on the sample loading plate. The sample loading rotating motor is connected to a sample loading rotating block. A sample loading screw rod is provided on the sample loading rotating block. The sample loading rack is placed on the sample loading rotating block and is penetrated by the sample loading screw rod. A sample loading limit nut is installed at one end of the sample loading screw rod passing through the sample loading rack.

7. The detection device for the primary process of marine corrosion according to claim 6, characterized in that, No less than three sample loading jacks are opened in the lower part of the sample loading rack. Sample loading plug posts that are inserted into the sample loading jacks with a clearance fit are provided on the sample loading rotating block. A rotation limit ring is opened in the lower part of the sample loading rotating block, and a rotation limit rod that cooperates with the rotation limit ring is provided on the sample loading plate.

8. The detection device for the initial process of marine corrosion according to claim 7, characterized in that, Two sample loading telescopic top rods that are vertically oriented and symmetric about the sample loading rotating motor are also provided on the sample loading plate. The upper part of the sample loading telescopic top rod is arc-shaped.

9. The detection device for the initial process of marine corrosion according to claim 8, characterized in that, A wire hole is opened in the part of the sample loading plate where the sample loading rotating motor and the sample loading telescopic top rod are installed. The sample loading rotating shaft is a hollow shaft, and the middle hole part thereof is communicated with the wire hole, and a wire harness outlet is opened in the cross section of one end of the sample loading rotating shaft close to the sample loading flipping motor.

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