A corrosion testing device, its control method, and its usage.

Abstract

This invention provides a corrosion testing device, its control method, and its usage. The corrosion testing device includes: a reaction unit with a sealed reaction chamber inside, a mounting structure within the reaction chamber for fixing the sample to be tested within the reaction chamber, the reaction unit having an opening and a cover capable of closing the opening; a gas supply device connected to the reaction chamber for introducing protective gas, corrosive gas, and erosion particles into the reaction chamber; a heating device for heating the gas within the reaction chamber; a fan located within the reaction chamber, at least a portion of the fan being made of the same material as the sample; and a motor connected to the fan for driving the fan to rotate. This corrosion testing device can simulate both low-speed and high-speed erosion.

Description

Technical Field

[0001] This invention relates to the field of corrosion testing, and more particularly to a corrosion testing device, its control method, and its usage. Background Technology

[0002] In practical engineering, some structures need to operate in corrosive gas environments. Simultaneously, these structures may also be affected by high temperatures or the coupled effects of erosion. To prevent structural failure during operation, corrosion testing equipment is needed to determine the structure's service life under different corrosive conditions, thereby determining the replacement cycle. However, existing corrosion testing equipment struggles to simultaneously simulate both high-speed and low-speed erosion in scenarios involving the coupling of corrosion and erosion. Summary of the Invention

[0003] This invention provides a corrosion testing device, its control, and its usage method, which addresses how to simulate both high-speed and low-speed erosion in scenarios involving the coupling of corrosion and erosion.

[0004] A first aspect of this invention provides a corrosion testing device, comprising: a reaction device having a sealed reaction chamber inside, the reaction chamber having a mounting structure for fixing a sample to be tested within the reaction chamber, the reaction device having an opening and a cover capable of closing the opening; a gas supply device communicating with the reaction chamber for introducing a protective gas, a corrosive gas, and erosion particles into the reaction chamber; a heating device for heating the gas within the reaction chamber; a fan located within the reaction chamber, at least a portion of the fan being made of the same material as the sample; and a motor connected to the fan for driving the fan to rotate.

[0005] In some embodiments, the fan includes: a rotating shaft connected to the motor; fan blades, a plurality of fan blades spaced apart around the rotating shaft, the fan blades being detachably connected to the rotating shaft, and the fan blades being made of the same material as the sample being tested.

[0006] In some embodiments, the fan is an axial fan, and the fan is located directly below the mounting structure.

[0007] In some embodiments, the heating device includes a microwave heating element for generating microwaves and heating the reaction chamber with the microwaves.

[0008] In some embodiments, the heating device further includes a heating jacket fitted over the outside of the reaction device and in contact with the reaction device, the heating jacket containing a microwave absorbing medium.

[0009] In some embodiments, the corrosion testing device further includes: a post-treatment tank having a post-treatment chamber containing a tail gas treatment liquid; a connecting pipeline connecting the reaction chamber and the post-treatment chamber; an air pump located in the connecting pipeline for drawing gas from the reaction chamber into the post-treatment chamber; and a pressure relief pipeline connecting the reaction chamber and the post-treatment chamber; wherein the reaction device further includes a pressure relief port, the pressure relief pipeline connecting the pressure relief port to the post-treatment chamber, and the pressure relief port having a safety valve that opens when the gas pressure in the reaction chamber exceeds a pressure threshold.

[0010] A second aspect of the present invention provides a control method for a corrosion testing device. This control method is applied to the corrosion testing device provided in the first aspect above. The control method includes: controlling the gas supply device to introduce corrosive gas and erosion particles into the reaction chamber, and controlling the heating device to heat the gas in the reaction chamber until the gas pressure in the reaction chamber reaches a target gas pressure and the temperature in the reaction chamber reaches a target temperature; and controlling the motor to drive the fan to rotate at a preset speed for a preset duration.

[0011] In some embodiments, controlling the motor to drive the fan to rotate at a preset speed for a preset duration includes: controlling the motor to drive the fan to rotate at a preset constant speed for a preset duration, or controlling the motor to drive the fan to rotate at a preset speed variation pattern for a preset duration.

[0012] In some embodiments, the gas supply device can also introduce air into the reaction chamber, and the corrosion testing device further includes: a post-treatment tank and an air pump, wherein the post-treatment tank has a post-treatment chamber; after controlling the motor to drive the fan to rotate at a preset speed for a preset time, the control method further includes: controlling the gas supply device to introduce air or protective gas into the reaction chamber, and controlling the air pump to draw the gas in the reaction chamber into the post-treatment chamber.

[0013] A third aspect of the present invention provides a method of using a corrosion testing device. The method of using the corrosion testing device provided in the first aspect above includes: inserting the sample and the fan into the reaction chamber through the opening; sealing the opening with a cover and corroding the sample and the fan through the corrosion testing device; opening the cover and removing the sample and the fan through the opening.

[0014] This invention provides a corrosion testing device, which includes a reaction device with a sealed reaction chamber inside. The reaction chamber has a mounting structure for mounting the sample to be tested, and the reaction device has an opening and a cover for closing the opening. The testing device also includes a gas supply device, a heating device, a fan, and a motor. The gas supply device is used to introduce protective gas, corrosive gas, and erosion particles into the reaction chamber. The heating device is used to heat the gas in the reaction chamber, thereby providing a specific corrosive environment for the sample to be tested. After the environment in the reaction chamber reaches the target, the motor drives the fan to rotate to generate airflow in the reaction chamber and drive erosion particles to impact the sample to be tested, thereby simulating the coupling of corrosion and erosion under a specific environment. At least a portion of the fan is made of the same material as the sample to be tested, meaning that at least a portion of the fan is also the sample to be tested. Driven by the airflow generated by the fan, the erosion particles impact the sample at a lower speed, thereby simulating low-speed erosion. At the same time, during the rotation of the fan, the erosion particles impact the fan at a higher speed, thereby simulating high-speed erosion. Thus, it is possible to simultaneously simulate both low-speed and high-speed erosion without setting up any additional structures, taking into account both low-speed and high-speed erosion scenarios. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the first corrosion testing device provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the assembly of a fan and a motor in a corrosion testing device provided in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the second corrosion testing device provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the third corrosion testing device provided in the embodiments of the present invention;

[0019] Figure 5 A schematic flowchart illustrating the control method of the first corrosion testing device provided in an embodiment of the present invention;

[0020] Figure 6 A schematic flowchart illustrating the control method of the second corrosion testing device provided in an embodiment of the present invention;

[0021] Figure 7 A schematic flowchart illustrating the control method of the third corrosion testing device provided in this embodiment of the invention;

[0022] Figure 8 A schematic flowchart illustrating the control method of the fourth corrosion testing device provided in this embodiment of the invention;

[0023] Figure 9 This is a schematic flowchart illustrating the usage method of a corrosion testing device provided in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures

[0025] 1. Corrosion testing device; 10. Reaction device; 11. Reaction chamber; 12. Mounting structure; 13. Opening; 14. Cover; 141. Safety valve; 142. Pressure relief port; 20. Gas supply device; 30. Heating device; 31. Microwave heating element; 32. Heating jacket; 33. Excitation element; 40. Fan; 41. Rotating shaft; 42. Fan blade; 50. Motor; 61. Post-treatment tank; 611. Post-treatment chamber; 62. Connecting pipeline; 63. Air pump; 64. Pressure relief pipeline. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The specific technical features described in the various embodiments in the detailed implementation can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0028] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] Additionally, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate any similarity or connection between them. It should be understood that the directional descriptions such as "above," "below," "inside," and "outside" refer to the orientation under normal use conditions.

[0030] In the following specific embodiments, the testing device can be applied to corrosion testing in any corrosion and erosion coupled environment. The corrosion can be caused by any corrosive gas. The corrosive gas can be a weakly corrosive gas that is non-toxic or low-toxic to the environment. After the test, the gas can be directly discharged into the atmosphere. Alternatively, the corrosive gas can be a strongly corrosive gas that is toxic to the environment. After the test, the gas needs to be treated before it can be discharged into the atmosphere. Unless otherwise specified, the following embodiments do not limit the type of corrosive gas.

[0031] In some embodiments, such as Figure 1 As shown, the corrosion testing device 1 includes: a reaction device 10, a gas supply device 20, a heating device 30, a fan 40, and a motor 50. The reaction device 10 has a reaction chamber 11, and the reaction chamber 11 has a mounting structure 12 for mounting the sample to be tested. The reaction chamber 11 provides a specific corrosion environment for the sample, thereby simulating the corrosion of the sample under a specific corrosion environment. For example, the mounting structure 12 can be a cantilever structure extending from the inner wall of the reaction chamber 11, on which the sample can be placed. The reaction chamber 11 is a closed structure; during the corrosion test, the gas inside the reaction chamber 11 will not escape to the outside of the reaction chamber 11 under the target condition. Only when it is necessary to exhaust the gas from the reaction chamber 11 can the gas be vented into other spaces outside the reaction chamber 11 under controlled conditions. For example, during the reaction process, to avoid excessive gas pressure inside the reaction chamber 11, When the gas pressure inside the reaction chamber 11 is greater than the preset gas pressure threshold, gas is allowed to be discharged from the reaction chamber 11 through the pressure relief port. When the gas pressure inside the reaction chamber 11 is less than the preset gas pressure threshold, the pressure relief port is automatically closed. Under other circumstances, gas inside the reaction chamber 11 is not allowed to flow out of the reaction chamber 11 during the reaction process. At the same time, the reaction device 10 also has an opening 13 and a cover 14 that can close the opening 13. The opening and closing of the opening 13 can be controlled by the cover 14. When the opening 13 is open, the space inside the reaction chamber 11 is exposed, which allows samples or other structures to be easily loaded into the reaction chamber 11 and samples or other structures that have been corroded to be easily removed from the reaction chamber 11. When the opening 13 is closed, the reaction chamber 11 is in a sealed state.

[0032] The gas supply device 20 is connected to the reaction chamber 11 and is used to introduce protective gas, corrosive gas, and erosion particles into the reaction chamber 11. It can be understood that the atmosphere in the reaction chamber 11 can be controlled by the gas supply device 20. For example, before the test begins, the protective gas is introduced into the reaction chamber 11 to squeeze out the air in the reaction chamber 11 to reduce the influence of air on the reaction and also to protect the inner wall of the reaction chamber 11. When the test begins, the corrosive gas is introduced into the reaction chamber 11 filled with protective gas to corrode the sample. At the same time, the gas supply device 20 can also introduce erosion particles into the reaction chamber 11 to simulate the use scenario of corrosion and erosion coupling. The erosion particles can be, for example, quartz sand or metal shavings.

[0033] The heating device 30 is used to heat the gas in the reaction chamber to simulate the high-temperature working environment of the sample, thereby making the simulated structure more consistent with the actual situation. The heating device 30 can heat the gas in the reaction chamber 11 in any way. For example, the heating device 30 can be an electric heating wire directly installed in the reaction chamber 11, thereby directly heating the gas in the reaction chamber 11. For example, the heating device 30 can also be a heating sleeve located outside the reaction chamber 11 and in contact with the reaction device 10, thereby indirectly heating the gas in the reaction chamber 11 and avoiding corrosion of the heating device 10 by the corrosive gas in the reaction chamber 11.

[0034] Meanwhile, fan 40 is located inside reaction chamber 11, and motor 50 drives fan 40 to rotate. Gas supply device 20 introduces protective gas, corrosive gas, and erosion particles into reaction chamber 11. Heating device 30 heats reaction chamber 11. When the gas pressure and temperature in reaction chamber 11 reach the target pressure and temperature, gas supply device 20 stops supplying gas into reaction chamber 11, and heating device 30 stops heating or lowers the heating temperature to maintain the temperature in reaction chamber 11 at the target temperature. At this time, fan 40 is driven to rotate by motor 50 to generate airflow in reaction chamber 11. Erosion particles are driven by airflow to impact the surface of the sample, thereby simulating the coupling of corrosion and erosion.

[0035] At least a portion of the fan 40 is made of the same material as the sample. This can be understood as at least a portion of the fan 40 also being tested. Observing the corrosion of this portion can determine the lifespan of the sample material under specific conditions. It should be noted that in actual working scenarios, the impact velocity between erosion particles and the sample can vary considerably. If the erosion particles are still driven by airflow to impact the sample at high speed, the power of the motor 50 needs to be set very high, increasing the manufacturing cost of the corrosion testing device. Furthermore, because the motor 50 is a high-power motor, it is difficult to achieve precise adjustment within a small speed range. This makes it difficult to simulate the scenario of low-speed impact of erosion particles on the sample using a high-power motor. In other words, the relevant testing device... In scenarios involving the coupling of simulated corrosion and erosion, it is difficult to simultaneously simulate both high-speed and low-speed erosion, thus making it impossible to adjust the erosion speed over a wide range. This invention addresses this by setting at least a portion of the fan 40 to be made of the same material as the sample, and by setting the rotational speed of the fan 40 to be greater than the airflow velocity generated at that speed. This allows the erosion particles to impact the sample at a lower speed under the influence of the airflow generated by the fan 40, thereby simulating low-speed erosion. Simultaneously, during the rotation of the fan 40, the erosion particles impact the fan 40 at a higher speed, thereby simulating high-speed erosion. This allows for the simultaneous simulation of both low-speed and high-speed erosion without the need for additional structures, thus balancing both low-speed and high-speed erosion scenarios. Optionally, by simulating the high-speed erosion scenario through the rotation of fan 40, the corrosion of the moving workpiece in the device can also be simulated through fan 40. It can be understood that if the high-speed erosion in the device is caused by the collision between the workpiece and the erosion particles during movement, simulating high-speed erosion through the rotation of fan 40 can make the collision mode between the erosion particles and fan 40 closer to the collision mode between the moving workpiece and the erosion particles in the actual working scenario, thereby making the simulation structure closer to reality.

[0036] Optionally, the motor 50 is a variable frequency motor, and the motor is located outside the reaction device 10. The motor 50 is connected to the fan 40 through a drive shaft.

[0037] Optionally, a pressure sensor and a temperature sensor are installed inside the reaction chamber 11. The pressure sensor is used to obtain the pressure inside the reaction chamber 11, and the temperature sensor is used to obtain the temperature inside the reaction chamber 11. Optionally, the inner wall of the reaction chamber 11 is provided with thermal insulation material to improve the thermal insulation effect of the reaction chamber 11.

[0038] This invention provides a corrosion testing device, which includes a reaction device with a sealed reaction chamber inside. The reaction chamber has a mounting structure for mounting the sample to be tested, and the reaction device has an opening and a cover for closing the opening. The testing device also includes a gas supply device, a heating device, a fan, and a motor. The gas supply device is used to introduce protective gas, corrosive gas, and erosion particles into the reaction chamber. The heating device is used to heat the gas in the reaction chamber, thereby providing a specific corrosive environment for the sample to be tested. After the environment in the reaction chamber reaches the target, the motor drives the fan to rotate to generate airflow in the reaction chamber and drive erosion particles to impact the sample to be tested, thereby simulating the coupling of corrosion and erosion under a specific environment. At least a portion of the fan is made of the same material as the sample to be tested, meaning that at least a portion of the fan is also the sample to be tested. Driven by the airflow generated by the fan, the erosion particles impact the sample at a lower speed, thereby simulating low-speed erosion. At the same time, during the rotation of the fan, the erosion particles impact the fan at a higher speed, thereby simulating high-speed erosion. Thus, it is possible to simultaneously simulate both low-speed and high-speed erosion without setting up any additional structures, taking into account both low-speed and high-speed erosion scenarios.

[0039] In some embodiments, such as Figure 2 As shown, the fan 40 includes a rotating shaft 41 and fan blades 42. The rotating shaft 41 is connected to a motor 50. Multiple fan blades 42 are arranged at intervals around the rotating shaft 41. The rotating shaft 41 drives each fan blade 42 to rotate under the drive of the motor 50, thereby generating airflow in the reaction chamber 11. At the same time, the fan blades 42 are detachably connected to the rotating shaft 41, and the material of the fan blades 42 is the same as the material of the sample. It can be understood that the fan blades 42 also serve as the sample to be tested. Before the test begins, new fan blades can be assembled on the rotating shaft 41. After the test is completed, the fan blades 42 that have been corroded are removed from the rotating shaft 41 in order to determine the degree of corrosion of the fan blades 42.

[0040] In some embodiments, such as Figure 1 As shown, fan 40 is an axial flow fan, located directly below mounting structure 12. It can be understood that the airflow generated by fan 40 flows out along the rotation axis of fan 40. This airflow can blow the erosion particles upward toward the sample fixed on mounting structure 12. After leaving the airflow, the erosion particles will fall to the bottom of reaction chamber 11 under their own gravity and then be blown up by fan 40 again. By setting fan 40 directly below mounting structure 12, the airflow generated by fan 40 can exert an upward force on the erosion particles in a direction parallel to the direction of gravity of the erosion particles, so that the force is used entirely to blow the erosion particles toward the sample, thereby achieving a better erosion effect.

[0041] In some embodiments, such as Figure 3As shown, the heating device 30 includes a microwave heating element 31, which is used to apply microwaves to the reaction chamber 11, thereby heating the gas inside the reaction chamber 11. Since microwaves have penetrating power, the microwave heating element 31 can be placed outside the reaction chamber 11, thus preventing corrosive gases from corroding it. Furthermore, the installation hole provided in the reaction device 10 for the microwave heating element 31 to pass through further improves the airtightness of the reaction chamber 11. Optionally, the microwave heating element 31 can directly emit microwaves to the reaction chamber 11, causing the gas molecules inside the reaction chamber 11 to vibrate at high speed, thereby heating the gas inside the reaction chamber 11. Optionally, the microwave heating element 31 can also heat the reaction chamber 11 by heating the external structure of the reaction chamber 11 through heat conduction.

[0042] In some embodiments, such as Figure 3 As shown, the heating device 30 also includes a heating sleeve 32, which is fitted over the outside of the reaction device 10 and in contact with it. The heating sleeve 32 contains an absorbing medium that efficiently absorbs the microwaves emitted by the microwave heating element 31 and converts them into heat energy. This allows for more efficient use of the microwave energy generated by the microwave heating element 31 to heat the reaction cavity 11. Optionally, insulation material surrounds the heating sleeve 32 to reduce heat loss and further improve the heating efficiency of the heating sleeve 32 on the reaction cavity 11.

[0043] Optional, such as Figure 3 As shown, the heating device 30 also includes an excitation element, which can absorb microwaves from the microwave heating element 31 to form a microwave channel. The heating sleeve 32 is located in the microwave channel, thereby further improving the heating efficiency.

[0044] In some embodiments, such as Figure 4As shown, the corrosion testing device 1 further includes: a post-treatment tank 61, a connecting pipe 62, and an air pump 63. The post-treatment tank 61 has a post-treatment chamber 611, which contains a tail gas treatment liquid. The tail gas treatment liquid is used to react with the corrosive gas to convert the corrosive gas into a gas that is harmless to the environment. For example, when the corrosive gas is acidic, the tail gas treatment liquid is an alkaline liquid to neutralize the acidic gas. The connecting pipe 62 connects the reaction chamber 11 and the post-treatment chamber 611. The air pump 63 is located in the connecting pipe 62. When the air pump 63 is running, it can extract the corrosive gas from the reaction chamber 11 into the post-treatment chamber 611 so that the post-treatment liquid reacts with the corrosive gas. Optionally, during the corrosion test, the air pump 63 is stopped, and the reaction chamber 11 is sealed, preventing the corrosive gas in the reaction chamber 11 from entering the post-processing chamber 611 through the connecting pipe 62. Optionally, the air pump 63 is a vacuum diaphragm pump, which runs continuously. The connecting pipe 62 has a switch valve, which is closed during the corrosion test and can only be opened after the corrosion test is completed, further improving the airtightness of the reaction chamber 11. After the corrosion test is completed, the air pump 63 starts running and draws the corrosive gas from the reaction chamber 11 into the post-processing chamber 611. Only after the corrosive gas in the reaction chamber 11 has been completely extracted can the cover be opened and at least part of the sample and fan 40 removed from the reaction chamber 11, thus preventing the corrosive gas from affecting the external environment. This corrosion testing device 1 is suitable for scenarios where samples are corroded using highly corrosive or highly toxic gases, such as fluorine gas.

[0045] Optionally, the post-treatment tank 61 also has a liquid inlet and a drain outlet. The liquid inlet is used to replenish the tail gas treatment liquid into the post-treatment chamber, and the drain outlet is used to discharge the waste liquid after the reaction. Optionally, the post-treatment tank 61 also includes a liquid level sensor to obtain the remaining amount of tail gas treatment liquid in the post-treatment chamber 611. Optionally, the post-treatment tank 61 also includes a corrosion gas detector to detect the treatment effect of the post-treatment tank 61 on corrosion gases.

[0046] Meanwhile, the corrosion testing device 1 also includes a pressure relief pipeline 64, and the reaction device 10 also includes a pressure relief port 142. The pressure relief pipeline 64 connects the pressure relief port 142 to the post-treatment chamber 611. The pressure relief port 142 has a safety valve 141. When the gas pressure in the reaction chamber 11 is greater than the gas pressure threshold, the safety valve 141 is opened by the gas, so that some of the corrosive gas in the reaction chamber 11 enters the post-treatment chamber 611 through the pressure relief pipeline 64 and the gas pressure in the reaction chamber 11 drops below the gas pressure threshold. At this time, the safety valve 141 closes the reaction chamber 11 and returns it to a sealed state, thereby preventing the reaction device 10 from being damaged or causing a safety accident due to excessive gas pressure in the reaction chamber 11.

[0047] Optional, such as Figure 4 As shown, the corrosion testing apparatus 1 also includes a cooling device 70. The cooling system 70 is in contact with the reaction apparatus 10 and is used to reduce the temperature inside the reaction chamber 11. After the reaction is completed, the temperature inside the reaction chamber 11 needs to be reduced to near room temperature before the corrosive gas is drawn into the post-treatment chamber 611. This allows the corrosive gas to be drawn into the post-treatment chamber 611 more fully and reduces the possibility of high-temperature gas damaging the post-treatment tank 61 and related pipelines. Optionally, the cooling device 70 is also used for... Figure 4 The microwave heating element 31 and heating sleeve 32 are cooled.

[0048] This invention also provides a control method for a corrosion testing device, which is applied to the device shown in the accompanying drawings. Figures 1 to 4 The entity executing the control method for any of the corrosion testing devices shown in the figures can be understood as the control unit of the corrosion testing device. The flow of the control method will be described below with reference to various embodiments.

[0049] In some embodiments, such as Figure 5 As shown, Figure 5 This is a flowchart illustrating a control method for a first corrosion testing device provided in an embodiment of the present invention. The control method includes:

[0050] Step S101: Control the gas supply device to introduce corrosive gas and erosion particles into the reaction chamber, and control the heating device to heat the gas in the reaction chamber until the gas pressure in the reaction chamber reaches the target gas pressure and the temperature in the reaction chamber reaches the target temperature.

[0051] This can be understood as follows: after the user loads the sample to be tested into the reaction chamber, the gas supply device is controlled to change the atmosphere inside the reaction chamber. For example, firstly, the gas supply device is controlled to introduce protective gas into the reaction chamber and expel the participating air in the reaction chamber, and then corrosive gas is introduced into the reaction chamber; at the same time, the heating device is controlled to control the temperature inside the reaction chamber.

[0052] The gas pressure in the reaction chamber can be controlled by the gas supply duration of the gas supply device, or by installing a gas pressure sensor in the reaction chamber to achieve feedback control of the gas pressure in the reaction chamber. The gas pressure in the reaction chamber can also be controlled by the on-time of the heating device, or by installing a temperature sensor in the reaction chamber to achieve feedback control of the temperature in the reaction chamber.

[0053] Step S102: Control the motor to drive the fan to rotate at a preset speed for a preset duration.

[0054] This can be understood as controlling the rotation of a fan to generate airflow within the reaction chamber, thereby causing the airflow to carry erosion particles to impact the sample, achieving coupled testing of corrosion and erosion under specific temperatures and atmospheres. Simultaneously, since at least a portion of the fan is made of the same material as the sample, and the fan's rotation speed is higher than the airflow velocity, this portion of the fan can also be considered to bear the coupled effect of corrosion and erosion during the fan's rotation, and this erosion is high-speed erosion. That is, the coupling of corrosion and low-speed erosion is achieved through the sample, and the coupling of corrosion and high-speed erosion is achieved through at least a portion of the fan. Thus, it is possible to simultaneously simulate both low-speed and high-speed erosion without setting up additional structures, taking into account both low-speed and high-speed erosion scenarios.

[0055] After the fan has rotated for a preset time, the fan is controlled to stop rotating. At this time, the sample and the fan can be removed from the reaction chamber to observe the corrosion of the parts of the sample and the fan that are made of the same material as the sample.

[0056] In some embodiments, such as Figure 6 As shown, Figure 6 This is a schematic flowchart of the control method for the second corrosion testing device provided in an embodiment of the present invention. Figure 5 The process shown is different, Figure 5 Step S102 includes:

[0057] Step S201: Control the motor to drive the fan to rotate at a preset constant speed for a preset duration.

[0058] This can be understood as controlling the fan to rotate at a constant speed, so that the erosion particles impact the sample at a constant speed, and making the part of the fan that is the same material as the sample collide with the erosion particles at a constant speed, so that the degree of erosion caused by the erosion particles to the sample and the fan remains constant, which makes it easy to control variables in corrosion testing.

[0059] In some embodiments, such as Figure 7 As shown, Figure 7 This is a schematic flowchart of the control method for the second corrosion testing device provided in an embodiment of the present invention. Figure 5 The process shown is different, Figure 5 Step S102 includes:

[0060] Step S301: Control the motor to drive the fan to rotate for a preset duration according to a preset speed change pattern.

[0061] This can be understood as controlling the fan to rotate at a preset speed, thereby generating a changing airflow in the reaction chamber. The degree of erosion of the sample and the fan by the eroding particles changes according to the preset pattern, so as to simulate the erosion of the sample and the fan by the eroding particles in the real environment, thus making the test results closer to the actual situation. Moreover, since the fan rotates at a variable speed, the force on the fan is a dynamic load, which can also realize the coupled testing of corrosion, erosion and dynamic load of the fan.

[0062] In some embodiments, the gas supply device can also introduce air into the reaction chamber, and the corrosion testing apparatus further includes a post-treatment tank and an air pump, the post-treatment tank having a post-treatment chamber, such as... Figure 8 As shown, Figure 8 A schematic flowchart of the control method for the fourth corrosion testing device provided in this embodiment of the invention is shown below. Figure 5 The control method shown is different in that, Figure 5 Following step S102, the control method further includes:

[0063] Step S401: Control the gas supply device to introduce air or protective gas into the reaction chamber, and control the gas pump to draw the gas in the reaction chamber into the post-processing chamber.

[0064] This can be understood as follows: a gas pump draws corrosive gas from the reaction chamber into the post-treatment chamber, which contains a tail gas treatment liquid. The reaction between the tail gas treatment liquid and the corrosive gas converts the corrosive gas into a harmless gas, which is then released into the atmosphere, thereby reducing the impact of the corrosive gas on the external environment. At the same time, by introducing air or protective gas into the reaction chamber, the space for corrosive gas in the reaction chamber is squeezed out, allowing the corrosive gas to be drawn into the post-treatment chamber more fully.

[0065] Optionally, the operation of the air pump's suction and the air supply device to ventilate the reaction chamber can be carried out simultaneously. The air or protective gas discharged into the reaction chamber and the air pump's suction create a scavenging effect in the reaction chamber, thereby enabling the corrosive gas in the reaction chamber to be more fully drawn into the post-treatment chamber. Optionally, the operation of the air pump's suction and the air supply device to ventilate the reaction chamber can also be carried out asynchronously. For example, firstly, most of the corrosive gas in the reaction chamber is drawn into the post-treatment chamber by the air pump, then the air supply device is controlled to introduce air or protective gas into the reaction chamber, and then the air pump is controlled to suction again. That is, the corrosive gas in the reaction chamber is more fully drawn into the post-treatment chamber through secondary exhaust.

[0066] Optionally, the corrosion testing apparatus also includes a cooling device, which controls the gas in the reaction chamber to cool to room temperature before the gas pump draws in the gas.

[0067] This invention also provides a method for using a corrosion testing device, which is applied as shown in the accompanying drawings. Figures 1 to 4 The corrosion testing apparatus shown in any of the images can be used by a testing operator or by a mechanical structure in an automated testing production line. The mechanical structure can be, for example, a trolley with a robotic arm. The process of the method will be illustrated below with reference to an embodiment.

[0068] like Figure 9 As shown, Figure 9 This is a flowchart illustrating a method of using a corrosion testing device according to an embodiment of the present invention. The method includes:

[0069] Step S501: Load the sample and fan into the reaction chamber through the opening.

[0070] This can be understood as opening the cover of the corrosion device to expose the opening of the reaction chamber. The sample can be fixed to the mounting structure through this opening. At the same time, a new fan can be installed into the reaction chamber and connected to the motor through this opening. It should be noted that at least part of the material of the fan is the same as the material of the sample. After the test is completed, the fan that has been corroded needs to be removed from the reaction chamber, so that a new fan needs to be installed into the reaction chamber before the next corrosion test begins.

[0071] Step S502: Seal the opening with the cover and corrode the sample and fan using a corrosion testing device.

[0072] This can be understood as follows: after the opening is sealed by the cover, the reaction chamber is in a closed state. Then, the corrosion testing device automatically performs corrosion tests on the sample and the fan according to the set conditions. The control process of the corrosion testing device can be found in the attached diagram of the instruction manual. Figures 5 to 8 The control method shown in any of the images.

[0073] Step S503: Open the cover and remove the sample and fan through the opening.

[0074] This can be understood as opening the cover after the corrosion test to expose the opening of the reaction chamber, allowing the corroded sample and fan to be removed through the opening. Optionally, the control method of the corrosion testing device also includes rendering the corrosive gases in the reaction chamber harmless. The cover is opened only after the corrosive gases have been rendered harmless and the gas temperature in the reaction chamber has dropped to room temperature, thereby reducing the impact of corrosive gases and high temperatures on the external environment and minimizing harm to surrounding personnel.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An apparatus for corrosion testing, characterized by The corrosion testing device comprises: a reaction device having a closed reaction cavity inside, the reaction cavity having a mounting structure for fixing the sample to be tested inside the reaction cavity, the reaction device having an opening and a cover capable of closing the opening; a gas supply device communicating with the reaction cavity for supplying protective gas, corrosion gas and erosion particles into the reaction cavity; a heating device for heating the gas in the reaction cavity; a fan located inside the reaction cavity, at least part of the material of the fan being the same as the material of the sample, for making the erosion particles impact the sample at a low speed under the airflow generated by the fan, thereby simulating low-speed erosion, while making the erosion particles impact the fan at a high speed during rotation of the fan, thereby simulating high-speed erosion, and thereby simultaneously simulating low-speed erosion and high-speed erosion; the fan is an axial fan, and the fan is located directly below the mounting structure; a motor connected with the fan for driving the fan to rotate; the fan comprises: a rotating shaft connected with the motor; a plurality of fan blades arranged at intervals around the rotating shaft, the fan blades being detachably connected with the rotating shaft, and the material of the fan blades being the same as the material of the sample to be tested; the heating device comprises a microwave heating element for generating microwaves and heating the reaction cavity by the microwaves; the heating device further comprises a heating jacket sleeved outside and in contact with the reaction device, and the heating jacket contains wave-absorbing medium.

2. The corrosion testing apparatus of claim 1, wherein, The corrosion testing device further comprises: a post-processing tank having a post-processing cavity inside, the post-processing cavity containing tail gas treatment liquid; a communication pipeline communicating the reaction cavity and the post-processing cavity; a gas pump located in the communication pipeline for pumping the gas in the reaction cavity into the post-processing cavity; a pressure relief pipeline communicating the reaction cavity and the post-processing cavity; wherein the reaction device further comprises a pressure relief port, the pressure relief pipeline is used to communicate the pressure relief port and the post-processing cavity, and the pressure relief port has a safety valve, which is opened when the gas pressure in the reaction cavity is greater than a gas pressure threshold.

3. A method of using a corrosion testing device, characterized by, The use method is applied to the corrosion testing device according to claim 1 or 2, and the use method comprises: loading the sample and the fan into the reaction cavity through the opening; covering the opening by the cover and corroding the sample and the fan by the corrosion testing device; opening the cover and taking out the sample and the fan through the opening.

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