A Rotating Hanging Specimen Corrosion Test Device and Test Method

Abstract

The present invention discloses a rotary coupon corrosion experiment device, which includes a reaction kettle and a crucible. A sample is suspended by a connecting rod above the crucible. An upper condenser plate, a heat shield plate, a lower condenser plate and a graphite felt are arranged on the connecting rod. A gas supply component and a lifting and rotating component are also arranged on the connecting rod. At the same time, the present invention also discloses a method for rotary coupon corrosion experiment, in which the sample is extended into the corrosion medium in the crucible for rotation to conduct the erosion corrosion experiment of the sample and obtain the erosion corrosion performance of the sample. The present invention provides a sealed reaction environment through the reaction kettle to prevent the volatilization and leakage of the corrosion medium during the experiment. A connecting rod is arranged to suspend the sample, and the connecting rod extends out of the reaction kettle and is connected to the lifting and rotating component to drive the connecting rod to lift and rotate, thereby driving the sample to lift and rotate, realizing the entry and exit of the sample from the corrosion medium, and realizing the rotation of the sample in the corrosion medium for erosion corrosion.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal corrosion and protection, and particularly relates to a rotary coupon corrosion test device and a test method. Background Art

[0002] It is urgent to develop dry reprocessing of off-site spent fuel. The dry reprocessing of spent fuel includes working conditions such as electrolytic reduction, electrolytic refining, cathode treatment, and molten uranium ingot casting, which involve static corrosion and erosion corrosion of electrolytic cells, processing crucibles, casting crucibles, and stirring rods in high-temperature molten salts or liquid metals. This poses high requirements for the corrosion resistance of the materials of electrolytic cells and crucibles. Due to the high activity characteristics of metallic uranium, the dry reprocessing needs to be carried out in a vacuum and inert gas environment. Therefore, in order to evaluate the corrosion resistance of the materials of electrolytic cells and crucibles, it is urgent to specifically develop static and erosion corrosion test devices.

[0003] The patent with the publication number CN215985673U invented a metal coupon long-term immersion corrosion simulation device, which can view and detect the corrosion state of metal coupons at different times, but this device can only carry out static corrosion experiments.

[0004] The patent with the publication number CN112147064A invented an erosion corrosion simulation test device for simulating the erosion corrosion conditions of the orifice of an aluminum tube at different erosion angles and different flow rates, but this device is carried out in the air and cannot be used to evaluate the materials for dry reprocessing of spent fuel.

[0005] The patent with the publication number CN111982733A discloses a lead-bismuth alloy erosion corrosion test device, which effectively solves the problem of corrosion product deposition in the loop. However, after the corrosion is completed, it is impossible to take out the corrosion sample from the lead-bismuth alloy melt, and the interaction between the melt and the sample during the cooling process cannot be evaluated. In addition, it is difficult to separate the sample from the alloy and molten salt after the experiment.

[0006] In summary, the existing erosion corrosion experiments have the following problems:

[0007] 1) During the heating process of liquid metals and high-temperature molten salts, they are prone to volatilization, and the existing devices lack collection devices for liquid metals and molten salts;

[0008] 2) After the corrosion is completed, the sample is still placed in the metal or molten salt, which affects the accuracy of the evaluation on the one hand and increases the difficulty of subsequent sample cleaning on the other hand;

[0009] 3) The corrosion process is carried out in the air, and the sample is prone to oxidation, which affects the corrosion results.

[0010] Therefore, a rotary coupon corrosion test device and a test method are needed. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to provide a rotating coupon corrosion test device in view of the deficiencies of the above-mentioned prior art. The device provides a sealed reaction environment through a reaction kettle to prevent the volatilization and leakage of corrosive media during the experiment. A connecting rod is provided for hanging samples, and the connecting rod extends out of the reaction kettle and is connected to a lifting and rotating assembly to drive the connecting rod to lift and rotate, thereby driving the sample to lift and rotate, realizing the entry and exit of the sample from the corrosive medium, and realizing the rotation of the sample in the corrosive medium for erosion corrosion.

[0012] To solve the above technical problems, the technical solution adopted by the present invention is: a rotating coupon corrosion test device, characterized in that the device includes a reaction kettle and a crucible installed at the bottom of the reaction kettle. A sample is suspended above the crucible through a connecting rod. The connecting rod extends out of the reaction kettle. The part of the connecting rod inside the reaction kettle is sequentially provided with an upper condensation plate, a heat shield plate, a lower condensation plate and a graphite felt from top to bottom. The part of the connecting rod outside the reaction kettle is provided with a gas supply assembly for providing cooling gas to the heat shield plate and a lifting and rotating assembly for lifting and rotating the connecting rod.

[0013] The above-mentioned rotating coupon corrosion test device is characterized in that the connecting rod is connected to the sample through a hanging tool. The hanging tool is a circular plate hanging tool, a rectangular plate hanging tool or a cylindrical rod hanging tool. The sample is fixed on the hanging tool through a fixture. The material of the fixture is metal or ceramic.

[0014] The above-mentioned rotating coupon corrosion test device is characterized in that the number of the upper condensation plates is more than 1, and the number of the lower condensation plates is more than 1.

[0015] The above-mentioned rotating coupon corrosion test device is characterized in that the connecting rod and the heat shield plate are both of hollow structure and communicate with each other. The gas supply assembly includes an upper limiter and a lower limiter installed on the connecting rod. A sealing shell is hermetically installed on the upper limiter and the lower limiter. A first sealing ring, a second sealing ring and a third sealing ring are sequentially installed on the connecting rod between the upper limiter and the lower limiter. A plurality of air inlets are opened on the connecting rod between the first sealing ring and the second sealing ring. A corresponding air inlet pipe is opened on the sealing shell. An air outlet is opened on the connecting rod between the second sealing ring and the third sealing ring. A gas passage leading to the heat shield plate is arranged along the inside of the connecting rod at the air outlet. A corresponding air outlet pipe is opened on the sealing shell.

[0016] The above-mentioned rotating coupon corrosion test device is characterized in that the lifting and rotating assembly includes a lifting motor and a screw rod slide table connected to the lifting motor. A rotating motor is connected to the screw rod slide table. The output shaft of the rotating motor is connected to the connecting rod through a quick-release coupling.

[0017] The above-mentioned rotary coupon corrosion test device is characterized in that a sliding seal is installed between the connecting rod and the reaction kettle, and the sliding seal is a magnetic fluid seal, a JO-shaped rubber seal or an O-ring rubber seal.

[0018] The above-mentioned rotary coupon corrosion test device is characterized in that a vacuum assembly is further provided on the reaction kettle.

[0019] The above-mentioned method is characterized by including the following steps:

[0020] Step 1: Load the corrosion medium into the crucible, connect the sample to the hanger and then to the connecting rod, evacuate the reaction kettle and then fill it with an inert gas to obtain the device to be corroded.

[0021] Step 2: Pass a cooling gas into the heat shield of the device to be corroded obtained in Step 1, then heat the corrosion medium, then immerse the sample in the corrosion medium and rotate it to conduct a scouring corrosion experiment to obtain a scouring corrosion sample.

[0022] Step 3: Clean, weigh and conduct kinetic characterization on the scouring corrosion sample obtained in Step 2 to obtain the scouring corrosion performance of the sample.

[0023] In the present invention, the sample is connected to the hanger and then to the connecting rod. The immersion and departure of the sample from the corrosion medium are realized by the lifting of the connecting rod, and the rotation of the sample is realized by the rotation of the connecting rod, so as to realize the rotary coupon corrosion experiment.

[0024] The above-mentioned method is characterized in that the corrosion medium is a metal, salt, water, alkali solution or acid solution. The present invention is applicable to a variety of corrosion tests.

[0025] The present invention has the following advantages compared with the prior art:

[0026] 1. The present invention provides a closed reaction environment through the reaction kettle to prevent the volatilization and leakage of the corrosion medium during the corrosion experiment. The connecting rod is provided for hanging the sample, and the connecting rod extends out of the reaction kettle and is connected to the lifting and rotating assembly to drive the lifting and rotation of the connecting rod, thereby driving the lifting and rotation of the sample, realizing the entry and departure of the sample from the corrosion medium, and realizing the rotation of the sample in the corrosion medium for scouring corrosion.

[0027] 2. In the present invention, an upper condensation plate, a heat shield, a lower condensation plate and a graphite felt are sequentially arranged from top to bottom on the part of the connecting rod in the reaction kettle. The graphite felt initially absorbs the volatilized corrosion medium, and the upper condensation plate, the heat shield and the lower condensation plate condense the volatilized corrosion medium, preventing the corrosion medium from overflowing while realizing the recovery of the corrosion medium. The condensation effect is improved by setting a gas supply assembly that provides cooling gas for the heat shield.

[0028] 3. In view of the problems such as sample oxidation, evaporation of molten salt and liquid metal during the corrosion process, the present invention proposes a rotating coupon corrosion test method, which conducts static and erosion corrosion of liquid metal, high-temperature molten salt, etc. under vacuum or protective atmosphere, and can separate the sample from the melt in the molten state through lifting, simplifying the analysis and treatment steps of the sample, with simple operation and high reliability.

[0029] 4. The present invention sets up a lifting and rotating assembly to control the position of the sample, realizing precise control of the corrosion time of the sample in the corrosion medium, improving the reliability of the results. After the experiment, the sample is taken out from the melt, reducing the cleaning time of the corrosion medium such as liquid metal or molten salt on the sample surface. The corrosion experiment of the sample is carried out under vacuum or inert gas protection through the vacuum assembly, eliminating the influence of oxidation on the corrosion results.

[0030] 5. By controlling the structure of the fixture, the present invention can conduct multi-sample corrosion simultaneously, enabling high-temperature corrosion including high-temperature molten salt, liquid metal, etc., and can carry out material selection analysis under working conditions such as dry post-treatment electrolytic refining and cathode treatment.

[0031] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the rotating coupon corrosion test device of the present invention.

[0033] Figure 2 is a schematic connection diagram of the gas supply assembly and the connecting rod in the rotating coupon corrosion test device of the present invention.

[0034] Figure 3 is a schematic structural diagram of the circular plate fixture in the rotating coupon corrosion test device of the present invention.

[0035] Figure 4 is a schematic connection diagram of the circular plate fixture and the sample in the rotating coupon corrosion test device of the present invention.

[0036] Figure 5 is a schematic connection diagram of the cylindrical rod fixture and the sample in the rotating coupon corrosion test device of the present invention.

[0037] Figure 6 is a morphology diagram of the eroded sample after corrosion obtained in Example 2 of the present invention.

[0038] Description of the Reference Numerals:

[0039] 1 - Reaction kettle; 2 - Crucible; 2-1 - Support;

[0040] 3 - Connecting rod; 4 - Sample; 5 - Upper condensation plate;

[0041] 6 - Heat shield; 7 - Lower condensation plate; 8 - Graphite felt;

[0042] 9 - Gas supply assembly; 9-1 - Upper limiter; 9-2 - Lower limiter;

[0043] 9-3 - Sealing housing; 9-4 - First sealing ring; 9-5 - Second sealing ring;

[0044] 9-6 - Third sealing ring; 9-7 - Inlet port; 9-8 - Inlet pipe;

[0045] 9-9 - Outlet port; 9-10 - Gas channel; 9-11 - Outlet pipe;

[0046] 10-1 - Lifting motor; 10-2 - Lead screw slide; 10-3 - Rotary motor;

[0047] 10-4 - Quick-release coupling; 11 - Hanger; 11-1 - Circular plate hanger;

[0048] 11-2 - Mounting hole; 11-3 - Fixture; 11-4 - Cylindrical rod hanger;

[0049] 12 - Sliding seal; 13 - Vacuum assembly. Detailed implementation mode

[0050] A rotating coupon corrosion test device of the present invention is described in detail through Embodiment 1.

[0051] Embodiment 1

[0052] As Figure 1 shown, a rotating coupon corrosion test device of this embodiment includes a reaction kettle 1 and a crucible 2 installed at the bottom of the reaction kettle 1. A sample 4 is suspended by a connecting rod 3 above the crucible 2. The connecting rod 3 extends out of the reaction kettle 1. The part of the connecting rod 3 inside the reaction kettle 1 is sequentially provided with an upper condensation plate 5, a heat shield 6, a lower condensation plate 7 and a graphite felt 8 from top to bottom. The part of the connecting rod 3 outside the reaction kettle 1 is provided with a gas supply assembly 9 for supplying cooling gas to the heat shield 6 and a lifting and rotating assembly for lifting and rotating the connecting rod 3.

[0053] It should be noted that the sealed reaction environment is provided by the kettle 1 to prevent the volatilization and leakage of the corrosive medium during the corrosion experiment. The connecting rod 3 is provided for hanging the sample 4, and the connecting rod 3 extends out of the reaction kettle 1 and is connected to the lifting and rotating assembly to drive the connecting rod 3 to lift and rotate, thereby driving the sample 4 to lift and rotate, realizing the entry and exit of the sample 4 from the corrosive medium, and realizing the rotation of the sample 4 in the corrosive medium for erosion corrosion. The part of the connecting rod 3 inside the reaction kettle 1 is successively provided with an upper condensation plate 5, a heat shield 6, a lower condensation plate 7 and a graphite felt 8 from top to bottom. The graphite felt 8 initially absorbs the volatilized corrosive medium, and the upper condensation plate 5, the heat shield 6 and the lower condensation plate 7 condense the volatilized corrosive medium, preventing the overflow of the corrosive medium while realizing the recovery of the corrosive medium. The condensation effect is improved by setting the air supply assembly 9 that provides cooling gas for the heat shield 6.

[0054] It should be noted that when the experimental device is used, the reaction kettle 1 is placed in the heating device to heat the crucible 2 in the reaction kettle 1.

[0055] It should be noted that a bracket 2-1 is provided at the bottom of the crucible 2.

[0056] It should be noted that the top of the reaction kettle 1 is a flange.

[0057] As Figure 1 、 Figure 3 、 Figure 4 and Figure 5 shown, in this embodiment, the connecting rod 3 connects the sample 4 through the hanger 11. The hanger 11 is a circular plate hanger 11-1, a rectangular plate hanger or a cylindrical rod hanger 11-4. The sample 4 is fixed on the hanger 11 through the fixture 11-3. The material of the fixture 11-3 is metal or ceramic. Connecting the sample 4 through the hanger 11 is used to load more samples 4. When the hanger 11 is a circular plate, a plurality of mounting holes 11-2 are evenly formed on the circular plate hanger 11. The sample 4 is connected to the mounting holes 11-2 of the circular plate hanger 11-1 through a metal wire or a ceramic sheet, and the erosion effect of the sample 4 in the corrosive medium can be adjusted by adjusting the position of the sample 4 with respect to the connecting rod 3. The rectangular plate hanger is similar to the circular plate hanger 11-1. When the hanger 11 is a cylindrical rod, the sample 4 is directly fixed on the cylindrical rod through a metal wire or a ceramic sheet.

[0058] As Figure 1 shown, in this embodiment, the number of the upper condensation plates 5 is more than 1, and the number of the lower condensation plates 7 is more than 1. The condensation effect is improved by using multiple upper condensation plates 5 and multiple lower condensation plates 7.

[0059] As Figure 1 and Figure 2As shown, in this embodiment, both the connecting rod 3 and the heat shield 6 are hollow structures and are interconnected. The air supply assembly 9 includes an upper limiter 9-1 and a lower limiter 9-2 mounted on the connecting rod 3. A sealing housing 9-3 is hermetically installed on the upper limiter 9-1 and the lower limiter 9-2. A first sealing ring 9-4, a second sealing ring 9-5, and a third sealing ring 9-6 are sequentially installed on the connecting rod 3 between the upper limiter 9-1 and the lower limiter 9-2. A plurality of air inlets 9-7 are formed on the connecting rod 3 between the first sealing ring 9-4 and the second sealing ring 9-5. A corresponding air inlet pipe 9-8 is formed on the sealing housing 9-3. An air outlet 9-9 is formed on the connecting rod 3 between the second sealing ring 9-5 and the third sealing ring 9-6. A gas passage 9-10 leading to the heat shield 6 is arranged along the inside of the connecting rod 3 at the air outlet 9-9. A corresponding air outlet pipe 9-11 is formed on the sealing housing 9-3. By setting both the connecting rod 3 and the heat shield 6 as hollow structures and interconnecting them, it is convenient to introduce cooling gas into the heat shield 6 through the connecting rod 3, improving the condensation effect. Moreover, the sealing of the connecting rod 3 above the air inlets 9-7 ensures the air supply effect. Through the upper limiter 9-1, the lower limiter 9-2, and the sealing housing 9-3, a sealing housing 9-3 with a certain space inside is sleeved on the connecting rod 3 for introducing cooling gas and discharging the cooling gas after condensation. By sequentially installing a first sealing ring 9-4, a second sealing ring 9-5, and a third sealing ring 9-6 on the connecting rod 3 between the upper limiter 9-1 and the lower limiter 9-2, the upper limiter 9-1, the lower limiter 9-2, and the sealing housing 9-3 are divided into several regions. The region between the first sealing ring 9-4 and the second sealing ring 9-5 is the air inlet region. And through a plurality of air inlets 9-7 formed on the connecting rod 3 and a corresponding air inlet pipe 9-8 formed on the sealing housing 9-3, the cooling gas enters the air inlet region through the air inlet pipe 9-8 and then enters the inside of the connecting rod 3 through the air inlets 9-7 and thus is introduced into the heat shield 6. The cooling gas after circulating in the heat shield 6 is led out to the air outlet region between the second sealing ring 9-5 and the third sealing ring 9-6 through the gas passage 9-10 arranged along the inside of the connecting rod 3, and the circulated cooling gas is discharged through a corresponding air outlet pipe 9-11 formed on the sealing housing 9-3.

[0060] As Figure 1As shown in the figure, in this embodiment, the lifting and rotating assembly includes a lifting motor 10-1 and a lead screw slider 10-2 connected to the lifting motor 10-1. A rotating motor 10-3 is connected to the lead screw slider 10-2. The output shaft of the rotating motor 10-3 is connected to the connecting rod 3 through a quick-release coupling 10-4. The lifting motor 10-1 drives the lead screw slider 10-2 to lift, thereby driving the rotating motor 10-3 to lift, realizing the lifting of the connecting rod 3 and the components on the connecting rod 3. The output shaft of the rotating motor 10-3 is connected to the connecting rod 3 through a quick-release coupling 10-4, facilitating the rotation of the connecting rod 3 and realizing the rotary erosion corrosion of the sample 4.

[0061] As Figure 1 shown, in this embodiment, a sliding seal 12 is installed between the connecting rod 3 and the reaction kettle 1. The sliding seal 12 is a magnetic fluid seal, a JO-shaped rubber seal or an O-shaped rubber seal. By adopting the sliding seal 12, while ensuring the seal, the connecting rod 3 can rotate and lift.

[0062] As Figure 1 shown, in this embodiment, a vacuum assembly 13 is further provided on the reaction kettle 1. By setting the vacuum assembly 13, vacuum pumping and introducing a protective gas into the reaction kettle 1 are realized, protecting the sample 4 and the corrosion medium in the rotary coupon corrosion experiment from oxidation.

[0063] It should be noted that the vacuum assembly 13 is a vacuum mechanical pump and a molecular pump, realizing vacuum pumping and introducing a protective gas.

[0064] A method for rotary coupon corrosion experiment of the present invention is described in detail through Embodiments 2 to 4.

[0065] Embodiment 2

[0066] This embodiment includes the following steps:

[0067] Step 1: Load the corrosion medium into the crucible 2, connect the sample 4 to the fixture 11 and then to the connecting rod 3, evacuate the reaction kettle 1 and then fill it with an inert gas to obtain a device to be corroded; the corrosion medium is metallic Ce.

[0068] Step 2: Pass a cooling gas into the heat shield 6 in the device to be corroded obtained in Step 1, then heat the corrosion medium, then immerse the sample 4 in the corrosion medium and rotate it to conduct a scouring corrosion experiment to obtain a scoured and corroded sample 4; the material of the sample 4 is metallic Nb; the temperature for heating the corrosion medium is 900 °C.

[0069] Step 3: Clean, weigh and characterize the scoured and corroded sample 4 obtained in Step 2 to obtain the erosion corrosion resistance of the sample 4.

[0070] Figure 6 is the morphology diagram of the eroded and corroded sample 4 obtained in this embodiment. It can be seen from Figure 6 that intergranular corrosion occurred on the surface of the sample 4 after erosion-corrosion.

[0071] Embodiment 3

[0072] This embodiment includes the following steps:

[0073] Step 1: Load the corrosion medium into the crucible 2, connect the sample 4 to the fixture 11 and then to the connecting rod 3. After evacuating the reaction kettle 1, fill it with inert gas to obtain the device to be corroded; the corrosion medium is chloride salt;

[0074] Step 2: Pass cooling gas into the heat shield 6 in the device to be corroded obtained in Step 1, then heat the corrosion medium, then immerse the sample 4 in the corrosion medium and rotate it to conduct an erosion-corrosion experiment to obtain the eroded and corroded sample 4; the material of the sample 4 is stainless steel; the heating temperature of the corrosion medium is 600 °C;

[0075] Step 3: Clean, weigh and characterize the eroded and corroded sample 4 obtained in Step 2 to obtain the erosion-corrosion resistance of the sample 4.

[0076] After testing, the weight loss of the eroded and corroded sample 4 obtained in this embodiment is 0.00425 g.

[0077] Embodiment 4

[0078] This embodiment includes the following steps:

[0079] Step 1: Load the corrosion medium into the crucible 2, connect the sample 4 to the fixture 11 and then to the connecting rod 3. After evacuating the reaction kettle 1, fill it with inert gas to obtain the device to be corroded; the corrosion medium is nitric acid solution;

[0080] Step 2: Pass cooling gas into the heat shield 6 in the device to be corroded obtained in Step 1, then heat the corrosion medium, then immerse the sample 4 in the corrosion medium and rotate it to conduct an erosion-corrosion experiment to obtain the eroded and corroded sample 4; the material of the sample 4 is titanium alloy; the heating temperature of the corrosion medium is 90 °C;

[0081] Step 3: Clean, weigh and characterize the eroded and corroded sample 4 obtained in Step 2 to obtain the erosion-corrosion resistance of the sample 4.

[0082] The above are only the preferred embodiments of the present invention and do not impose any limitation on the present invention. Any simple modification, change and equivalent change made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A rotating coupon corrosion test device, characterized in that The device includes a reaction kettle (1) and a crucible (2) installed at the bottom of the reaction kettle (1). A sample (4) is suspended by a connecting rod (3) at the upper part of the crucible (2). The connecting rod (3) extends out of the reaction kettle (1). The part of the connecting rod (3) inside the reaction kettle (1) is successively provided with an upper condensation plate (5), a heat shield (6), a lower condensation plate (7) and a graphite felt (8) from top to bottom. The part of the connecting rod (3) outside the reaction kettle (1) is provided with a gas supply assembly (9) for providing cooling gas for the heat shield (6) and a lifting and rotating assembly for lifting and rotating the connecting rod (3); the number of the upper condensation plates (5) is more than 1, and the number of the lower condensation plates (7) is more than 1; the connecting rod (3) and the heat shield (6) are both of hollow structures and communicate with each other. The gas supply assembly (9) includes an upper limiter (9-1) and a lower limiter (9-2) clamped on the connecting rod (3). A sealing housing (9-3) is hermetically installed on the upper limiter (9-1) and the lower limiter (9-2). A first sealing ring (9-4), a second sealing ring (9-5) and a third sealing ring (9-6) are successively installed on the connecting rod (3) between the upper limiter (9-1) and the lower limiter (9-2). A plurality of air inlets (9-7) are opened on the connecting rod (3) between the first sealing ring (9-4) and the second sealing ring (9-5). A corresponding air inlet pipe (9-8) is opened on the sealing housing (9-3). An air outlet (9-9) is opened on the connecting rod (3) between the second sealing ring (9-5) and the third sealing ring (9-6). A gas passage (9-10) leading to the heat shield (6) is arranged along the inside of the connecting rod (3) for the air outlet (9-9). A corresponding air outlet pipe (9-11) is opened on the sealing housing (9-3).

2. The rotating hanging slice corrosion experiment device according to claim 1, characterized in that, The connecting rod (3) is connected to the sample (4) through a hanging tool (11). The hanging tool (11) is a circular plate hanging tool (11-1), a rectangular plate hanging tool or a cylindrical rod hanging tool (11-4). The sample (4) is fixed on the hanging tool (11) through a clamp (11-3). The material of the clamp (11-3) is metal or ceramic.

3. The rotating hanging piece corrosion experiment device according to claim 1, characterized in that, The lifting and rotating assembly includes a lifting motor (10-1) and a screw rod slide (10-2) connected to the lifting motor (10-1). A rotating motor (10-3) is connected to the screw rod slide (10-2). The output shaft of the rotating motor (10-3) is connected to the connecting rod (3) through a quick-release coupling (10-4).

4. The rotating hanging piece corrosion experiment device according to claim 1, characterized in that, A sliding seal (12) is installed between the connecting rod (3) and the reaction kettle (1). The sliding seal (12) is a magnetic fluid seal, a JO-shaped rubber seal or an O-shaped rubber seal.

5. The rotating hanging piece corrosion experiment device according to claim 1, characterized in that, A vacuum assembly (13) is further arranged on the reaction kettle (1).

6. A method for conducting a rotating coupon corrosion experiment using the device according to any one of claims 1 to 5, characterized in that, The method includes the following steps: Step 1: Load a corrosion medium into the crucible (2), connect the sample (4) to the hanging tool (11) and then connect it to the connecting rod (3). After evacuating the inside of the reaction kettle (1), fill it with an inert gas to obtain a device to be corroded; Step 2: Introduce a cooling gas into the heat shield (6) of the device to be corroded obtained in Step 1, then heat the corrosion medium, and then immerse the sample (4) in the corrosion medium and rotate it to conduct an erosion-corrosion experiment to obtain an erosion-corrosion sample (4); Step 3: Clean, weigh, and conduct kinetic characterization on the erosion-corrosion sample (4) obtained in Step 2 to obtain the erosion-corrosion performance of the sample (4).

7. The method according to claim 6, wherein The corrosion medium is a metal, salt, water, alkali solution, or acid solution.

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