A device for preparing a high-temperature medium corrosion specimen

Abstract

The embodiment of the present disclosure provides a preparation device for high-temperature medium corrosion samples, which comprises a sealed high-temperature-resistant cavity, a weighing module for suspending the sample and monitoring the weight of the sample in real time, a coating module for spraying the medium to the surface of the sample, a heating module for heating the sample, an atmosphere control module for providing and maintaining a preset gas environment in the high-temperature-resistant cavity, and a cleaning module for cleaning the inside of the high-temperature-resistant cavity. By integrating the medium coating, real-time dynamic weighing, high-temperature heating, atmosphere control and self-cleaning functions in one sealed automated device, the technical difficulties such as uneven manual coating, inability to monitor the coating amount in real time, easy clogging of the equipment and interruption of the process are overcome, the high precision, high repeatability and full-process controllability of the sample preparation process are realized, and the reliability and scientificity of the high-temperature medium corrosion experimental data are significantly improved.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the technical field of high-temperature corrosion testing equipment, specifically relating to a device for preparing high-temperature medium corrosion samples. Background Technology

[0002] High-temperature corrosion is a core testing method for evaluating the service performance of materials used in key components of thermal power plants, aero-engines, and solar thermal power plants. However, current sample preparation and preliminary corrosion simulation techniques in this field still have significant shortcomings, limiting the accuracy and repeatability of experimental data. Existing technologies mainly suffer from the following deficiencies: The coating process relies on manual labor and has poor consistency: Current media coating, such as molten salt coating, mostly uses manual brushing or immersion, which makes it difficult to accurately control the coating thickness and uniformity. This results in significant deviations in the amount of salt applied to different samples or even different areas of the same sample, which directly affects the comparability and reliability of corrosion experiments.

[0003] The coating amount cannot be accurately monitored in real time: The coating amount per unit area is a key initial parameter that determines the thermal corrosion kinetics of materials. Current technologies lack the ability to weigh samples in real time and dynamically under high-temperature conditions, making it impossible to obtain and control this key parameter, resulting in unclear experimental conditions.

[0004] Insufficient equipment reliability: When using processes such as spraying, the medium is prone to crystallization at the nozzle, causing frequent blockages. This not only interrupts the experimental process but also introduces human intervention, disrupting the continuity of the experiment.

[0005] The coating and weighing processes are disconnected: traditionally, sample preparation and subsequent weighing processes are separate. During repeated heating, cooling, and transfer of the sample, the coating layer cracks and peels off, resulting in inconsistent integrity and density of the coating layer on different samples.

[0006] There are technical blind spots in the preparation of certain specimens: For high-temperature tensile specimens, traditional coating methods may result in uneven coating thickness in the circumferential direction of the specimen, the gauge length, and the boss position due to the "edge effect". This non-uniformity will introduce pitting corrosion in subsequent mechanical tests, which will seriously interfere with the accurate evaluation of the intrinsic mechanical properties of the material. Summary of the Invention

[0007] The embodiments disclosed herein aim to at least solve one of the technical problems existing in the prior art, and provide an apparatus for preparing high-temperature medium corrosion samples.

[0008] Embodiments of this disclosure provide an apparatus for preparing a high-temperature medium corrosion sample, the apparatus comprising: A sealed, high-temperature resistant cavity; A weighing module is installed at the top of the high-temperature resistant cavity, and its force-sensitive element extends into the interior of the high-temperature resistant cavity. It is used to suspend the sample and monitor the weight of the sample in real time. A coating module, the first end of which is connected to the high-temperature resistant cavity, is used to spray a medium onto the surface of the sample. A heating module is arranged around the outer surface of the high-temperature resistant cavity for heating the sample; An atmosphere control module, which is connected to the high-temperature resistant cavity, is used to provide and maintain a preset gas environment to the interior of the high-temperature resistant cavity; A cleaning module is installed at the bottom of the high-temperature resistant cavity and is used to clean the inside of the high-temperature resistant cavity.

[0009] Optionally, the weighing module includes a cantilever beam sensor, a suspension wire, and an electromagnetic shield; The cantilever beam sensor is located on the top outer surface of the high-temperature resistant cavity. One end of the suspension wire is connected to the cantilever beam sensor, and the other end passes through the top of the high-temperature resistant cavity to suspend the sample. The electromagnetic shielding component covers the periphery of the cantilever beam sensor.

[0010] Optionally, the cantilever beam sensor is made of sapphire material with a temperature resistance greater than 800℃; the electromagnetic shielding component is an electromagnetic shielding cover made of alumina ceramic.

[0011] Optionally, the coating module includes a multi-stage atomizing nozzle and a constant-temperature medium tank; The first end of the multi-stage atomizing nozzle passes through the high-temperature resistant cavity, and its second end is connected to the constant-temperature medium tank via a pipeline; wherein... The constant temperature medium tank is used to supply the constant temperature medium to the multi-stage atomizing nozzle, and the first end of the multi-stage atomizing nozzle is used to spray the constant temperature medium onto the sample surface.

[0012] Optionally, the multi-stage atomizing nozzle is configured to spray in a pulsed aerosol spraying mode with an adjustable spraying frequency; The medium includes at least one of molten salt, water vapor, flue gas, and ash.

[0013] Optionally, the preparation apparatus further includes a controller, which is electrically connected to the weighing module and the coating module respectively; The controller has a built-in deposition rate prediction model, and the controller is configured as follows: Obtain the total weight data of the sample monitored in real time by the weighing module; The real-time net weight gain data of the sample is obtained by subtracting the mass of the medium deposited on the suspension wire, calculated according to the deposition rate prediction model, from the total mass data of the sample. Based on the deviation between the real-time net weight gain data and the preset coating target value, the spraying parameters of the coating module are dynamically adjusted to achieve closed-loop control of the medium coating amount of the sample.

[0014] Optionally, the heating module includes an induction heating coil arranged around the outer wall of the high-temperature resistant cavity and a temperature measuring element disposed on the outer wall of the high-temperature resistant cavity. The induction heating coil is connected to a power source, and both the temperature measuring element and the power source are electrically connected to the controller. The temperature measuring element is used to detect the temperature of the sample and transmit a temperature signal to the controller. The controller controls the power supply to switch on and off according to the temperature signal, thereby heating the sample through the induction heating coil.

[0015] Optionally, the atmosphere control module includes an inert gas source, an atmosphere circulation device, and a gas pipeline; The gas pipeline connects the inert gas source and the atmosphere circulation device to the high-temperature resistant chamber; wherein, The atmosphere circulation device is configured to circulate the inert gas introduced into the high-temperature resistant cavity through the gas pipeline, so as to maintain the uniformity of the atmosphere composition in the high-temperature resistant cavity.

[0016] Optionally, the high-temperature resistant chamber includes a chamber body, a top cover detachably connected to the top of the chamber body, and a bottom cover detachably connected to the bottom of the chamber body; the side wall of the chamber body is also provided with a sampling door for quickly taking out and placing the sample.

[0017] Optionally, the cleaning module includes a high-pressure spray unit and an ultrasonic cleaning unit; The high-pressure spray unit includes a rotatable high-pressure nozzle located inside the chamber body and disposed on the bottom cover, and a high-pressure pump disposed on the side of the bottom cover away from the chamber body and connected to the high-pressure nozzle; The ultrasonic cleaning unit includes an array of ultrasonic transducers disposed within the high-temperature resistant cavity; wherein... The high-pressure spray unit and the ultrasonic cleaning unit can be started individually or in combination to remove media residues in the high-temperature resistant cavity; the bottom cover is also provided with a drain pipe to discharge waste liquid.

[0018] The high-temperature medium corrosion sample preparation apparatus of the present disclosure integrates medium coating, real-time dynamic weighing, high-temperature heating, atmosphere control and self-cleaning functions into a closed automated device. It overcomes the technical difficulties of uneven coating, inability to monitor coating amount in real time, easy equipment blockage and process interruption in traditional manual coating. It achieves high precision, high repeatability and full process control in the sample preparation process, and significantly improves the reliability and scientificity of high-temperature medium corrosion experimental data. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a high-temperature medium corrosion sample preparation apparatus according to an embodiment of the present disclosure. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The embodiments of this disclosure aim to solve problems in the prior art such as uneven coating, inability to monitor coating amount in real time, easy equipment clogging, and separation of coating and weighing processes. Through high integration and intelligent control, high precision, high repeatability, and full automation are achieved in the preparation of high-temperature medium corrosion samples. It should be noted that the medium includes at least one of molten salt, water vapor, flue gas, and ash. Of course, this embodiment is not limited to this, and under the technical concept of this disclosure, other components that can corrode the sample can also be used as the medium. The following description uses molten salt as an example of the medium.

[0022] like Figure 1 As shown, a high-temperature medium corrosion sample preparation apparatus 100 includes a sealed high-temperature resistant chamber 110, a weighing module 120, a coating module 130, a heating module 140, an atmosphere control module 150, and a cleaning module 160. The weighing module 120 is installed at the top of the high-temperature resistant chamber 110, with its force-sensitive element extending into the interior of the chamber, for suspending the sample 200 and monitoring its weight in real time. The first end of the coating module 130 is connected to the high-temperature resistant chamber 110 and is used to spray molten salt medium onto the surface of the sample 200. The heating module 140 is arranged around the outer surface of the high-temperature resistant chamber 110 for heating the sample 200. The atmosphere control module 150 is connected to the high-temperature resistant chamber 110 and is used to provide and maintain a preset gas environment inside the chamber. The cleaning module 160 is installed at the bottom of the high-temperature resistant cavity 110 and is used to clean the inside of the high-temperature resistant cavity 110.

[0023] Specifically, such as Figure 1As shown, the core of the preparation apparatus 100 is a sealed high-temperature resistant chamber 110. The high-temperature resistant chamber 110 is preferably made of a transparent material that is resistant to high temperatures and corrosion, such as high borosilicate glass, to facilitate observation of the internal experimental process. Further, the high-temperature resistant chamber 110 includes a chamber body 111, a top cover 112 detachably connected to the top of the chamber body 111, and a bottom cover 113 detachably connected to the bottom of the chamber body 111. A sampling hatch 114 is also provided on the side wall of the chamber body 111 for quickly loading and unloading the sample 200. (Refer to...) Figure 1 The high-temperature resistant chamber 110 includes a generally cylindrical chamber body 111, a top cover 112 detachably connected to the top of the chamber body 111 via flanges and seals, and a bottom cover 113 connected to the bottom. A sampling hatch 114 is also provided on the side wall of the chamber body 111. The sampling hatch 114 also has good sealing properties and can be used to quickly take and put in the sample 200 without stopping the machine or disrupting the main atmosphere, greatly improving operational convenience.

[0024] The weighing module 120 is crucial for achieving precise control. It is mounted on the top of the high-temperature resistant chamber 110. The weighing module 120 includes a cantilever beam sensor 121, a suspension wire 122, and an electromagnetic shield 123. The cantilever beam sensor 121 is located on the top outer surface of the high-temperature resistant chamber 110. One end of the suspension wire 122 is connected to the cantilever beam sensor 121, and the other end passes through the top of the high-temperature resistant chamber 110 to suspend the sample 200. The electromagnetic shield 123 covers the periphery of the cantilever beam sensor 121. The cantilever beam sensor 121 is made of sapphire material with a temperature resistance greater than 800℃. The electromagnetic shield 123 is an electromagnetic shielding cover made of alumina ceramic.

[0025] The cantilever beam sensor 121 is fixedly mounted on the outer surface of the top cover 112. Made of sapphire material with a temperature resistance exceeding 800℃, it serves as a force-sensitive element, ensuring long-term structural stability and measurement sensitivity under high-temperature conditions. One end of the suspension wire 122 is connected to the force-bearing end of the cantilever beam sensor 121, while the other end passes downwards through a sealed guide hole on the top cover 112 and extends into the high-temperature resistant cavity 110 to suspend the sample 200. To prevent the strong electromagnetic field generated by the external induction heating coil 141 from interfering with the weak electrical signal output by the cantilever beam sensor 121, an electromagnetic shield 123 made of alumina ceramic is tightly wrapped around the cantilever beam sensor 121, effectively isolating electromagnetic interference and ensuring the accuracy and stability of dynamic weighing data under high-temperature conditions.

[0026] For example, such as Figure 1As shown, the coating module 130 is used to uniformly and controllably deposit molten salt onto the surface of the sample 200. The first end (i.e., the spraying end) of the coating module 130 passes through the top cover 112 and extends into the high-temperature resistant chamber 110, pointing towards the suspended sample 200. The coating module 130 includes a multi-stage atomizing nozzle 131 and a constant-temperature medium tank 132. The first end of the multi-stage atomizing nozzle 131 passes through the high-temperature resistant chamber 110, and its second end is connected to the constant-temperature medium tank 132 via a pipeline. The constant-temperature medium tank 132 is used to supply a constant-temperature molten salt solution to the multi-stage atomizing nozzle 131, and the first end of the multi-stage atomizing nozzle 131 is used to spray the constant-temperature molten salt solution onto the surface of the sample 200.

[0027] Furthermore, the multi-stage atomizing nozzle 131 is configured to spray in a pulsed aerosol spraying mode with an adjustable spray frequency.

[0028] Specifically, such as Figure 1 As shown, the constant-temperature medium tank 132 is located outside the high-temperature resistant cavity 110 and is connected to the multi-stage atomizing nozzle 131 via an insulated pipeline. The constant-temperature medium tank 132 is equipped with a heating and temperature control device to store the molten salt solution and maintain it at a constant set temperature higher than its crystallization temperature, thereby preventing the salt solution from solidifying during transport. It is easy to understand that when the medium is of other components, only corresponding modifications need to be made to the constant-temperature medium tank so that the multi-stage atomizing nozzle can spray the corresponding medium. This is a common technique used by those skilled in the art and will not be elaborated upon here. The multi-stage atomizing nozzle 131 can atomize the constant-temperature molten salt solution into micron-sized aerosol particles. Preferably, the multi-stage atomizing nozzle 131 is configured to operate in a pulsed aerosol spray mode, and its spray frequency can be adjusted according to instructions. This pulsed spray mode (non-continuous spray) can effectively reduce the residence and crystallization accumulation of salt at the nozzle orifice, fundamentally solving the technical problem of nozzle clogging.

[0029] For example, such as Figure 1 As shown, the heating module 140 includes an induction heating coil 141 arranged around the outer wall of the high-temperature resistant cavity 110 and a temperature measuring element 142 disposed on the outer wall of the high-temperature resistant cavity 110. The induction heating coil 141 is connected to a power source (not shown), and the temperature measuring element 142 and the power source are both electrically connected to a controller (the relevant parts of the controller can be found in the detailed description below). The temperature measuring element 142 is used to detect the temperature of the sample 200 and transmit a temperature signal to the controller. The controller controls the on / off state of the power source according to the temperature signal, thereby heating the sample 200 through the induction heating coil 141.

[0030] Specifically, such as Figure 1As shown, the heating module 140 is used to provide the sample 200 with a high temperature simulating a real service environment. The heating module 140 is arranged around the outer surface of the high-temperature resistant cavity 110, specifically including a U-shaped induction heating coil 141 arranged around the outer wall of the cavity body 111 and a temperature measuring element 142 (such as an infrared thermometer or thermocouple) set on the cavity wall. The induction heating coil 141 is connected to a high-frequency power supply (not shown). When the power is turned on, the induction heating coil 141 generates an alternating magnetic field, causing eddy currents to be generated inside the metal sample 200, which rapidly heats itself. This heating method is highly efficient and uniform. The temperature measuring element 142 is used to monitor the surface temperature of the sample 200 in real time and feed the temperature signal back to the controller.

[0031] Furthermore, the atmosphere control module 150 includes an inert gas source (not shown), an atmosphere circulation device 151, and a gas pipeline 152. The gas pipeline 152 connects the inert gas source and the atmosphere circulation device 151 to the high-temperature resistant chamber 110. The atmosphere circulation device 151 is configured to circulate the inert gas introduced into the high-temperature resistant chamber 110 through the gas pipeline 152, thereby maintaining the uniformity of the atmosphere composition within the high-temperature resistant chamber 110.

[0032] The atmosphere control module 150 is connected to the high-temperature resistant chamber 110 and is used to provide and maintain a pure and stable inert gas environment (such as argon or helium) within the chamber during the experiment to prevent the sample from being oxidized at high temperatures. The atmosphere control module 150 includes an inert gas source (such as an argon or helium cylinder), an atmosphere circulation device 151, and a gas pipeline 152 connecting both to the high-temperature resistant chamber 110. Inert gas flows out from the gas source, through the gas pipeline 152, and into the high-temperature resistant chamber 110. The atmosphere circulation device 151 and the gas pipeline 152 work together to drive the gas within the high-temperature resistant chamber 110 to form a circulating flow, thereby ensuring the uniformity of the atmosphere composition and temperature throughout the high-temperature resistant chamber 110 and avoiding the impact of local atmosphere differences on the corrosion experiment.

[0033] Furthermore, the cleaning module 160 includes a high-pressure spray unit and an ultrasonic cleaning unit. The high-pressure spray unit includes a rotatable high-pressure nozzle 161 located within the chamber body 111 and mounted on the bottom cover 113, and a high-pressure pump 162 located on the side of the bottom cover 113 opposite to the chamber body 111 and connected to the high-pressure nozzle 161. The ultrasonic cleaning unit includes an ultrasonic transducer array 163 disposed within the high-temperature resistant chamber 110. The high-pressure spray unit and the ultrasonic cleaning unit can be activated individually or in combination to remove molten salt residue within the high-temperature resistant chamber 110. The bottom cover 113 is also provided with a drain pipe 164 for discharging waste liquid.

[0034] A cleaning module 160 is installed at the bottom of the high-temperature resistant chamber 110 to quickly and thoroughly clean the interior of the chamber after each experiment, preventing molten salt residue from crystallizing and affecting subsequent experiments. The cleaning module 160 includes a high-pressure spray unit and an ultrasonic cleaning unit. The high-pressure spray unit mainly includes a rotatable high-pressure nozzle 161 mounted on the inner surface of the bottom cover 113, and a high-pressure pump 162 located on the outside of the bottom cover 113, connected to the high-pressure nozzle 161, and providing high-pressure fluid to the nozzle. The ultrasonic cleaning unit includes an ultrasonic transducer array 163 embedded in the bottom of the chamber body 111 or on the bottom cover 113. During cleaning, the high-pressure spray can be activated alone to flush with a powerful water jet, or the ultrasonic waves can be activated alone to dislodge adhering substances using cavitation effects; both can also work together to achieve efficient cleaning. Waste liquid generated during cleaning is discharged through a drain pipe 164 penetrating the bottom cover 113.

[0035] For example, to achieve intelligent and precise control, the preparation apparatus 100 also includes a controller (not shown), which is typically a PLC or an industrial computer. The controller can be electrically connected to the weighing module 120 (cantilever beam sensor 121), the coating module 130 (multi-stage atomizing nozzle 131 and constant temperature medium tank 132), the heating module 140 (temperature measuring element 142 and induction heating coil, power supply), the atmosphere control module, and the cleaning module, respectively, to control the operation of each module.

[0036] As a concrete example, such as Figure 1 As shown, the preparation apparatus 100 also includes a controller (not shown), which is electrically connected to the weighing module 120 and the coating module 130. The controller has a built-in deposition rate prediction model and is configured to: acquire the total weight data of the sample 200 monitored in real time by the weighing module 120; subtract the mass of molten salt deposited on the suspension wire 122, calculated according to the deposition rate prediction model, from the total mass data of the sample to obtain the real-time net weight gain data of the sample 200; and dynamically adjust the spraying parameters of the coating module 130 based on the deviation between the real-time net weight gain data and the preset coating target value to achieve closed-loop control of the molten salt coating amount of the sample 200.

[0037] Specifically, such as Figure 1As shown, the core of the controller is the built-in deposition rate prediction model and the corresponding control algorithm. Its workflow is as follows: During the coating process, the controller continuously acquires the total weight data of the sample, which is monitored in real time by the weighing module 120. Since the suspension wire 122 is also exposed to the salt spray, a portion of molten salt will be deposited on its surface. This molten salt weight is not the amount required for the coating of the sample itself. Therefore, the controller calculates an estimate of the current molten salt deposition weight attached to the suspension wire 122 based on the deposition rate prediction model (which can be established based on prior or real-time data such as suspension wire size, position, and spraying parameters). Subsequently, this estimate is subtracted from the monitored total weight data to obtain the real-time net weight gain data of the sample 200 itself.

[0038] The controller compares the real-time net weight gain data with a preset coating target value (such as the target weight gain mass or the mass converted from the target coating thickness). Based on this deviation, the controller dynamically adjusts the spraying parameters of the coating module 130, such as the frequency of pulse spraying, atomization pressure, or spraying duration, through a closed-loop control algorithm (such as a PID algorithm). Simultaneously, the controller also receives signals from the temperature sensor 142 and maintains the temperature stability of the sample 200 by controlling the power supply to the induction heating coil 141. Through this closed-loop control system integrating real-time weight feedback (corrected by suspended wire deposition compensation) and intelligent adjustment, high-precision, automated control of the molten salt coating amount on the sample is ultimately achieved, ensuring high consistency and repeatability of coating quality between different samples.

[0039] It is easy to understand that the workflow of the high-temperature medium corrosion sample preparation device 100 is as follows: First, the sample 200 is suspended from the lower end of the suspension wire 122 through the sampling chamber door 114 or by opening the top cover 112. The chamber door or top cover is closed, and the atmosphere control module 150 is activated to replace the air inside the high-temperature resistant chamber 110 with an inert atmosphere. The heating module 140 is activated to heat the sample to the target temperature. The coating module 130 and the weighing module 120 are activated, and the controller automatically executes the coating process according to the above closed-loop control logic until the preset coating amount is reached. After the experiment, the heating and coating modules are turned off, and the cleaning module 160 is activated to automatically clean the high-temperature resistant chamber 110 in preparation for the next experiment.

[0040] It should be noted that, for special-shaped specimens such as high-temperature tensile specimens, which are prone to "edge effects," the embodiments of this disclosure can also be equipped with a dedicated ceramic clamp (not shown). The clamping part of this clamp has a precision V-groove, which can firmly hold the specimen and make the gauge length section of the specimen and the clamping section smoothly transition. This effectively avoids abnormal accumulation of the medium at the edges and corners during coating, ensuring uniform coating and laying the foundation for accurate mechanical property testing.

[0041] The high-temperature medium corrosion sample preparation apparatus of the present disclosure integrates medium coating, real-time dynamic weighing, high-temperature heating, atmosphere control and self-cleaning functions into a closed automated device. It overcomes the technical difficulties of uneven coating, inability to monitor coating amount in real time, easy equipment blockage and process interruption in traditional manual coating. It achieves high precision, high repeatability and full process control in the sample preparation process, and significantly improves the reliability and scientificity of high-temperature medium corrosion experimental data.

[0042] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. An apparatus for preparing high-temperature medium corrosion samples, characterized in that, The preparation apparatus includes: A sealed, high-temperature resistant cavity; A weighing module is installed at the top of the high-temperature resistant cavity, and its force-sensitive element extends into the interior of the high-temperature resistant cavity. It is used to suspend the sample and monitor the weight of the sample in real time. A coating module, the first end of which is connected to the high-temperature resistant cavity, is used to spray a medium onto the surface of the sample. A heating module is arranged around the outer surface of the high-temperature resistant cavity and is used to heat the sample. An atmosphere control module, which is connected to the high-temperature resistant cavity, is used to provide and maintain a preset gas environment to the interior of the high-temperature resistant cavity; A cleaning module is installed at the bottom of the high-temperature resistant cavity and is used to clean the inside of the high-temperature resistant cavity.

2. The apparatus for preparing high-temperature medium corrosion samples according to claim 1, characterized in that, The weighing module includes a cantilever beam sensor, a suspension wire, and an electromagnetic shielding component. The cantilever beam sensor is located on the top outer surface of the high-temperature resistant cavity. One end of the suspension wire is connected to the cantilever beam sensor, and the other end passes through the top of the high-temperature resistant cavity to suspend the sample. The electromagnetic shielding component covers the periphery of the cantilever beam sensor.

3. The apparatus for preparing high-temperature medium corrosion samples according to claim 2, characterized in that, The cantilever beam sensor is made of sapphire material with a temperature resistance greater than 800℃; the electromagnetic shielding component is an electromagnetic shielding cover made of alumina ceramic.

4. The apparatus for preparing high-temperature medium corrosion samples according to claim 1, characterized in that, The coating module includes a multi-stage atomizing nozzle and a constant-temperature medium tank; The first end of the multi-stage atomizing nozzle passes through the high-temperature resistant cavity, and its second end is connected to the constant-temperature medium tank via a pipeline; wherein... The constant temperature medium tank is used to supply the constant temperature medium to the multi-stage atomizing nozzle, and the first end of the multi-stage atomizing nozzle is used to spray the constant temperature medium onto the sample surface.

5. The apparatus for preparing high-temperature medium corrosion samples according to claim 4, characterized in that, The multi-stage atomizing nozzle is configured to spray in a pulse-type aerosol spray mode with an adjustable spray frequency; The medium includes at least one of molten salt, water vapor, flue gas, and ash.

6. The apparatus for preparing high-temperature medium corrosion samples according to claim 2, characterized in that, The preparation apparatus further includes a controller, which is electrically connected to the weighing module and the coating module respectively; The controller has a built-in deposition rate prediction model, and the controller is configured as follows: Obtain the total weight data of the sample monitored in real time by the weighing module; The real-time net weight gain data of the sample is obtained by subtracting the mass of the medium deposited on the suspension wire, calculated according to the deposition rate prediction model, from the total mass data of the sample. Based on the deviation between the real-time net weight gain data and the preset coating target value, the spraying parameters of the coating module are dynamically adjusted to achieve closed-loop control of the medium coating amount of the sample.

7. The apparatus for preparing high-temperature medium corrosion samples according to claim 6, characterized in that, The heating module includes an induction heating coil arranged around the outer wall of the high-temperature resistant cavity and a temperature measuring element disposed on the outer wall of the high-temperature resistant cavity. The induction heating coil is connected to a power source, and both the temperature measuring element and the power source are electrically connected to the controller. The temperature measuring element is used to detect the temperature of the sample and transmit a temperature signal to the controller. The controller controls the power supply to switch on and off according to the temperature signal, thereby heating the sample through the induction heating coil.

8. The apparatus for preparing high-temperature medium corrosion samples according to any one of claims 1 to 7, characterized in that, The atmosphere control module includes an inert gas source, an atmosphere circulation device, and gas pipelines; The gas pipeline connects the inert gas source and the atmosphere circulation device to the high-temperature resistant chamber; wherein, The atmosphere circulation device is configured to circulate the inert gas introduced into the high-temperature resistant cavity through the gas pipeline, so as to maintain the uniformity of the atmosphere composition in the high-temperature resistant cavity.

9. The apparatus for preparing a high-temperature medium corrosion sample according to any one of claims 1 to 7, characterized in that, The high-temperature resistant chamber includes a chamber body, a top cover detachably connected to the top of the chamber body, and a bottom cover detachably connected to the bottom of the chamber body; the side wall of the chamber body is also provided with a sampling door for quickly taking out and placing the sample.

10. The apparatus for preparing high-temperature medium corrosion samples according to claim 9, characterized in that, The cleaning module includes a high-pressure spray unit and an ultrasonic cleaning unit; The high-pressure spray unit includes a rotatable high-pressure nozzle located inside the chamber body and disposed on the bottom cover, and a high-pressure pump disposed on the side of the bottom cover away from the chamber body and connected to the high-pressure nozzle; The ultrasonic cleaning unit includes an array of ultrasonic transducers disposed within the high-temperature resistant cavity; wherein... The high-pressure spray unit and the ultrasonic cleaning unit can be started individually or in combination to remove media residues in the high-temperature resistant cavity; the bottom cover is also provided with a drain pipe to discharge waste liquid.

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