Corrosion test device and test method under high-temperature molten salt environment

Abstract

The embodiment of the application relates to the field of applying thermal methods to test materials, and particularly relates to a corrosion test device and a test method under a high-temperature molten salt environment. The test device is suitable for corrosion tests under a high-temperature molten salt environment. The test device is formed by setting a test furnace to form a sealed space. A heating assembly is arranged to provide a high-temperature environment for the sealed space. A temperature measuring assembly is arranged to determine the temperature of the high-temperature environment. The heating assembly is arranged to control the temperature of the high-temperature environment to stabilize the temperature during the test. An air inlet member is arranged to deliver gas into the sealed space to adjust the test atmosphere in the sealed space. An air outlet member is arranged to replace the gas in the sealed space. Each containing member is arranged in the sealed space and is arranged to contain molten salt. Each test assembly is arranged to enable the sample to react with the molten salt in the containing member in the sealed space. In this way, the device can simultaneously test multiple samples for different corrosion test durations.

Description

Technical Field

[0001] The embodiments of this application relate to the field of testing materials using thermal methods, specifically to a corrosion testing apparatus and method in a high-temperature molten salt environment. Background Technology

[0002] The statements herein are provided merely as background information in connection with this application and do not necessarily constitute prior art.

[0003] The dry reprocessing of spent fuel generates radioactive chloride salt residue, which requires solidification to prevent the spread of radioactive contamination. However, during solidification, the high reaction temperature makes the salt residue highly corrosive to the reaction vessel. To screen for reaction vessel materials with better corrosion resistance, corrosion tests are necessary on the tested vessel materials.

[0004] Currently, traditional corrosion testing methods and equipment have some shortcomings. Summary of the Invention

[0005] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the application. It is not intended to identify key or essential parts of the application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0006] In a first aspect, embodiments of this application provide a testing apparatus suitable for corrosion testing in a high-temperature molten salt environment, comprising: a testing furnace, a heating component, a temperature measuring component, an inlet component, an outlet component, multiple containment components, and multiple testing components; the testing furnace is configured to form a sealed space; the heating component is configured to provide a high-temperature environment for the sealed space, the temperature measuring component is configured to determine the temperature of the high-temperature environment, and the heating component is further configured to control the temperature of the high-temperature environment based on the temperature determined by the temperature measuring component, so as to stabilize the temperature during the test; the inlet component is configured to deliver gas into the sealed space to adjust the test atmosphere within the sealed space; the outlet component is configured to deliver the gas within the sealed space to the outside to replace the gas within the sealed space; each containment component is disposed in the sealed space and configured to contain molten salt; each testing component is configured to allow the test sample to react with the molten salt in the containment component within the sealed space.

[0007] The embodiments of this application establish a sealed space by setting up a test furnace. A heating component provides a high-temperature environment for the sealed space and controls the temperature of the high-temperature environment based on the temperature determined by a temperature measuring component, ensuring a stable ambient temperature during the test. An inlet and outlet are provided to control and replace the gas within the sealed space, ensuring an atmosphere conducive to the test and preventing the leakage of toxic gases. Multiple containers and multiple test components are provided, allowing for simultaneous testing of various samples with different corrosion test durations. This setup allows samples to be placed in different test components based on their corrosion test duration, with samples of the same corrosion test duration placed in the same test component. When a sample in a particular test component reaches its test duration, that component is sampled separately, while the other test components continue testing. This enables simultaneous testing of multiple samples with different corrosion durations under the same test environment.

[0008] Secondly, embodiments of this application also provide a testing method for conducting corrosion tests in a high-temperature molten salt environment using the testing apparatus provided in the first aspect, comprising the following steps: S10: preparing the required number of test apparatus containment components and test components, placing the required salt into the containment components, and placing the test sample into the test components; S20: placing the containment components into the containment limiting components of the test apparatus, and sealing the test furnace of the test apparatus using multiple sealing components of the test apparatus to form a sealed space inside the test furnace; S30: heating the test furnace using the heating components of the test apparatus to melt the salt in the containment components to form molten salt, and controlling the temperature and atmosphere inside the test furnace using the heating components, air inlet components, and air outlet components of the test apparatus; S40: after the molten salt is formed, replacing the sealing components with the test components containing the sample, and heating the test furnace to the test temperature using the heating components; S50: after the test, removing the test components and the sample, stopping heating, and removing the containment components from the test furnace.

[0009] The embodiments of this application conduct tests using the test apparatus provided in the first aspect. A number of test apparatus containers and test components are prepared for the test. A container filled with salt is placed into the container limiting member of the test apparatus. A sealing member is used to seal the test furnace of the test apparatus, creating a sealed space within the furnace. The temperature and atmosphere within the furnace are controlled, causing the salt to melt and form molten salt, thus meeting the conditions for a high-temperature molten salt test. The sealing member is then replaced with a test component containing the sample, and the test furnace is heated to the test temperature using a heating component to conduct the test, obtaining multiple samples under the same test environment. Attached Figure Description

[0010] Other objects and advantages of this application will become apparent from the following description of embodiments of this application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of this application.

[0011] Figure 1 This is a schematic diagram of the structure of the test apparatus according to an embodiment of this application.

[0012] Figure 2 This is a perspective view of the test apparatus of an embodiment of this application, omitting the heating component.

[0013] Figure 3 This is a front view of the test components of the test apparatus according to an embodiment of this application.

[0014] Figure 4 This is a front view of the receiving and limiting member of the test apparatus according to an embodiment of this application.

[0015] Figure 5 This is a cross-sectional view of the receiving and limiting member of the test apparatus according to an embodiment of this application.

[0016] Figure 6 This is a cross-sectional view of the housing of the test apparatus according to an embodiment of this application.

[0017] Figure 7 This is a front view of the sealing component of the test apparatus according to an embodiment of this application.

[0018] Figure 8 This is a corrosion rate curve of a sample obtained using the test apparatus and method of the embodiments of this application under different corrosive environments.

[0019] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding.

[0020] Explanation of reference numerals in the attached figures: 10. Test assembly; 11. Connector; 12. Sample carrier; 121. Sample slot; 122. Connecting part; 20. Test furnace; 21. Furnace body; 210. Sealed space; 211. Water cooling tank; 22. Furnace cover; 221. Flange; 23. Receiving and limiting component; 231. Limiting groove; 232. Furnace body mating part; 30. Heating assembly; 31. Heating element; 32. Temperature control element; 40. Temperature sensing components; 50. Retaining components; 60. Air intake components; 70. Vent components; 80. Sealing components. Detailed Implementation

[0021] Exemplary embodiments of this application will be described below with reference to the accompanying drawings. For clarity and brevity, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the development of any such actual embodiment to achieve the developer's specific goals, such as complying with constraints related to the system and business, and these constraints may vary depending on the implementation. Furthermore, it should be understood that while development work can be very complex and time-consuming, such development work is merely a routine task for those skilled in the art who benefit from the content of this application.

[0022] It should also be noted that, in order to avoid obscuring this application with unnecessary details, only the equipment structure and / or processing steps closely related to the solution according to this application are shown in the accompanying drawings, while other details that are not closely related to this application are omitted.

[0023] Traditional corrosion testing methods and equipment are inefficient and make it difficult to conduct batch screening of material samples under the same testing environment.

[0024] An embodiment of this application provides a testing apparatus suitable for corrosion testing in a high-temperature molten salt environment. See [link to relevant documentation]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the test apparatus according to an embodiment of this application. Figure 2 This is a perspective view of the test apparatus of an embodiment of this application, omitting the heating component. The test apparatus includes: a test furnace 20, a heating component 30, a temperature measuring component 40, an air inlet 60, an air outlet 70, multiple containment units 50, and multiple test components 10; the test furnace 20 is configured to form a sealed space 210; the heating component 30 is configured to provide a high-temperature environment for the sealed space 210, the temperature measuring component 40 is configured to determine the temperature of the high-temperature environment, and the heating component 30 is also configured to control the temperature of the high-temperature environment based on the temperature determined by the temperature measuring component 40, so as to stabilize the temperature during the test; the air inlet 60 is configured to deliver gas into the sealed space 210 to adjust the test atmosphere within the sealed space 210; the air outlet 70 is configured to deliver the gas within the sealed space 210 to the outside to replace the gas within the sealed space 210; each containment unit 50 is disposed in the sealed space 210 and is configured to contain molten salt; each test component 10 is configured to allow the test sample to react with the molten salt in the containment unit 50 within the sealed space 210.

[0025] The embodiments of this application establish a sealed space 210 by setting up a test furnace 20. A heating component 30 provides a high-temperature environment to the sealed space 210 and controls the temperature of this environment based on the temperature determined by the temperature measuring component 40, ensuring a stable ambient temperature during the test. An air inlet 60 and an air outlet 70 control and replace the atmosphere within the sealed space 210, ensuring an atmosphere conducive to the test. Multiple containers 50 and multiple test components 10 are provided, allowing for simultaneous testing of various samples with different corrosion test durations. This configuration allows samples to be placed in different test components 10 according to their corrosion test durations, while samples with the same corrosion test duration are placed in the same test component 10. When a sample in a particular test component 10 reaches its test duration, that component 10 is sampled individually, while the other test components continue testing. This enables simultaneous testing of various samples with different corrosion durations under the same test environment.

[0026] In some embodiments, the test assembly 10 may be configured to carry a sample so that the sample can contact and react with molten salt; the test assembly 10 may also be configured to be controllably and sealingly connected to the test furnace 20 so that after the sample is placed from outside the test furnace 20 into the sealed space 210 and comes into contact with the molten salt in the container 50, a sealed space 210 can be formed inside the test furnace 20.

[0027] With this configuration, each test assembly 10 can carry a sample, allowing the sample to contact and react with the molten salt, and is controllably and sealed to the test furnace 20. This ensures that after the sample is placed from outside the test furnace 20 into the sealed space 210 and comes into contact with the molten salt in the container 50, a sealed space 210 is formed inside the test furnace 20. This allows samples with the same corrosion duration to be placed on the same test assembly 10 when multiple samples are subjected to corrosion tests of different durations. When the test duration is reached, the test assembly 10 is sampled individually. At the same time, since only a single test assembly 10 is removed during sampling, while other test assemblies 10 remain sealed to the test furnace 20, the brief sampling process will not have a significant impact on the test environment inside the sealed space 210 or on the samples in other test assemblies 10. This enables multiple samples to be subjected to corrosion tests of different durations simultaneously under the same test environment.

[0028] In some embodiments, see Figure 3 , Figure 3This is a front view of the test assembly of the test apparatus according to an embodiment of this application. The test assembly 10 may include a connector 11 and a sample carrier 12; the connector 11 is detachably connected to the sample carrier 12, and the sample carrier 12 is configured to carry multiple samples so that each sample can contact the molten salt and react; the connector 11 is configured to be controllably and sealingly connected to the test furnace 20 so that after the sample contacts the molten salt, a sealed space 210 is formed inside the test furnace 20.

[0029] With this configuration, since the connector 11 is detachably connected to the sample carrier 12, each connector 11 can be adapted to various sample carriers 12 of different specifications. When different quantities and sizes of samples need to be carried, only the sample carrier 12 needs to be replaced. Since the sample carrier 12 needs to come into contact with corrosive molten salt, the service life of the sample carrier 12 is shorter than that of the connector 11. The detachable connection also facilitates the replacement of the sample carrier 12 after it is damaged. At the same time, when conducting tests with different corrosion durations on multiple samples, after the samples in the test assembly 10 reach the test duration, when sampling a single test assembly 10, the sample carrier 12 can be removed during the sampling process, and the connector 11 can be resealed and connected to the test furnace 20. This makes the sampling process faster and has less impact on the test environment inside the sealed space 210 and the samples in other test assemblies 10, so as to achieve simultaneous testing of multiple samples with different corrosion durations under the same test environment.

[0030] In some embodiments, a plurality of sample slots 121 are formed on the sample carrier 12 at equal intervals for placing a plurality of samples.

[0031] This configuration allows each sample carrier 12 to carry multiple samples, facilitating the testing of multiple samples in a sequential experiment.

[0032] The number of sample slots 121 on the sample carrier 12 can be 20.

[0033] In some embodiments, the sample carrier 12 has a connecting portion 122 that mates with the connector 11. This arrangement allows the sample carrier 12 to be detachably connected to the connector 11.

[0034] In some embodiments, a sealing portion may be formed on the connector 11 so that after the sample comes into contact with the molten salt, the sealing portion can be sealed and connected to the test component mounting hole of the test furnace 20.

[0035] This design allows the sealing part to be sealed and connected to the test component mounting hole of the test furnace 20, thereby minimizing the impact on the test environment inside the sealed space 210 and the samples in other test components 10 during the sampling process.

[0036] In some embodiments, see Figure 1 and Figure 2 The test furnace 20 may include a furnace body 21, a furnace cover 22, and a receiving and limiting member 23. The furnace cover 22 is configured to seal the furnace body 21 to form a sealed space 210. The receiving and limiting member 23 is disposed inside the furnace body 21 and is configured to limit the position of each receiving member 50.

[0037] With this configuration, the limiting member 23 limits each container 50 inside the furnace body 21, so that when each test component 10 enters the sealed space 210 from the test component mounting hole of the test furnace 20, the sample carrier 12 of each test component 10 can be aligned with the corresponding container 50, so that the sample can contact the molten salt in the container 50.

[0038] In some embodiments, the furnace cover 22 may be formed with a mounting portion so that the air inlet 60, the air outlet 70 and the temperature measuring component 40 can be sealed and mounted on the furnace cover 22, and each test component 10 can be controllably sealed and mounted on the furnace cover 22.

[0039] This configuration allows the furnace cover 22 to seal the furnace body 21 to form a sealed space 210, and each test component 10 can be controllably and sealed on the furnace cover 22, thereby minimizing the impact on the test environment inside the sealed space 210 and the samples in other test components 10 during the sampling process.

[0040] In some embodiments, see Figure 2 The furnace cover 22 may also include a flange 221, which is disposed inside the furnace cover 22 and is used to seal and limit the air inlet 60, the air outlet 70, the temperature measuring component 40 and each test component 10.

[0041] This configuration makes the seal between the furnace cover 22 and the air inlet 60, air outlet 70, temperature measuring component 40 and each test component 10 more stable, which facilitates maintaining the test environment.

[0042] In some embodiments, see Figure 2 The furnace body 21 may have a water cooling groove 211 to prevent the seal of the furnace cover 22 from failing at high temperatures.

[0043] This design makes the sealed space 210 formed by the furnace body 21 and the furnace cover 22 more stable, which is conducive to maintaining the test environment.

[0044] In some embodiments, see Figures 4 to 6 , Figure 4 This is a front view of the receiving and limiting member of the test apparatus according to an embodiment of this application. Figure 5 This is a cross-sectional view of the receiving and limiting member of the test apparatus according to an embodiment of this application. Figure 6This is a cross-sectional view of the receiving member of the test apparatus according to an embodiment of this application. The receiving limiting member 23 may be formed with a plurality of limiting grooves 231, the inner side of each limiting groove 231 cooperating with the outer side of each receiving member 50 to limit each receiving member 50.

[0045] With this configuration, the inner side of the limiting groove 231 cooperates with the outer side of each receiving part 50, so that the receiving part 50 is limited in the limiting groove 231 and will not move, thereby allowing the receiving part 50 to be stably placed in the furnace body 21.

[0046] The number of limit slots 231 can be 8.

[0047] In some embodiments, see Figure 4 and Figure 5 The receiving and limiting member 23 can be formed with a furnace body mating part 232 so that the receiving and limiting member 23 can be detachably connected to the furnace body 21, and each limiting groove 231 of the receiving and limiting member 23 is aligned with a corresponding test component mounting hole of the furnace cover 22, so that after the receiving member 50 is placed in the limiting groove 231, when each test component 10 enters the sealed space 210, the sample carrier 12 of each test component 10 can be aligned with a corresponding receiving member 50.

[0048] This configuration ensures that when each test component 10 enters the sealed space 210, the sample carrier 12 of each test component 10 can be aligned with a corresponding container 50, so that the sample can come into contact with the molten salt in the container 50.

[0049] In some embodiments, see Figure 1 and Figure 7 , Figure 7 This is a front view of the sealing element of the test apparatus according to an embodiment of this application. The test furnace 20 may also include a plurality of sealing elements 80; each sealing element 80 is configured to be controllably and sealingly connected to the test component mounting hole of the test furnace 20 so that the sealing space 210 can be kept sealed when the heating component 30 heats the test furnace 20.

[0050] With this setup, when conducting corrosion tests on multiple samples for different durations, after the samples in test assembly 10 have reached their test duration, when sampling a single test assembly 10, the single test assembly 10 can be removed and sealed with the corresponding test assembly mounting hole using the sealing component 80. This results in a shorter unsealed time in the sealed space 210 during sampling, minimizing the impact on the test environment inside the sealed space 210 and the samples in other test assemblies 10. This allows for simultaneous corrosion tests on multiple samples for different durations under the same test environment.

[0051] In some embodiments, see Figure 1 The heating assembly 30 may include a heating element 31 and a temperature control element 32. The heating element 31 is configured to accommodate the furnace body 21 of the test furnace 20 and heat the furnace body 21 to provide a high-temperature environment for the furnace body 21. The temperature control element 32 is configured to control the heating temperature of the heating element 31 according to the temperature determined by the temperature measuring component 40 so that the temperature is stable during the test.

[0052] With this configuration, the heating element 31 can accommodate the furnace body 21 of the test furnace 20 and heat the furnace body 21, so that the temperature is uniform throughout the furnace body 21 and each sample is in the same high-temperature environment during the test. At the same time, the temperature control element 32 can control the heating temperature of the heating element 31 according to the temperature determined by the temperature measuring component 40, so that the high-temperature environment can be adjusted at any time and the temperature of the high-temperature environment can be kept stable during the test.

[0053] In some embodiments, the temperature measuring component 40 may include a temperature measuring element and a protective element; the protective element is disposed on the furnace cover 22 of the test furnace 20 and is configured to protect the temperature measuring element in a high-temperature environment; the temperature measuring element is configured to enter the sealed space through the protective element to determine the temperature of the high-temperature environment.

[0054] With this configuration, the temperature measuring element can enter the molten salt through the protective element to determine the temperature of the sample, making the temperature measured by the temperature measuring element more accurate, so that the temperature of the high-temperature environment can be controlled by the temperature measuring component 40 during the test.

[0055] The embodiments of this application also provide a test method for conducting corrosion tests in a high-temperature molten salt environment using the test apparatus of any of the foregoing embodiments, which may include the following steps: S10: Prepare the required number of test apparatus containment 50 and test assembly 10, place the required salt into the containment 50, and place the test sample into the test assembly 10; S20: Place the containment 50 into the containment limiting member 23 of the test apparatus, and seal the test furnace 20 of the test apparatus using multiple sealing members 80 of the test apparatus to form a sealed space 210 inside the test furnace 20; S30: The heating component 30 of the test apparatus is used to heat the test furnace 20 to melt the salt in the container 50 to form molten salt, and the temperature and atmosphere inside the test furnace 20 are controlled by the heating component 30, the air inlet 60 and the air outlet 70 of the test apparatus; S40: After the molten salt is formed, the test component 10 containing the sample is used to replace the sealing component 80, and the test furnace 20 is heated to the test temperature by the heating component 30 for testing; S50: After the test is completed, the test component 10 and the sample are taken out, heating is stopped, and the container 50 is removed from the test furnace 20.

[0056] The embodiments of this application conduct tests using the test apparatus provided in any of the foregoing embodiments. A number of test apparatus containers 50 and test components 10 are prepared to meet the test requirements. The containers 50 containing salt are placed into the containment limiting member 23 of the test apparatus. The test furnace 20 of the test apparatus is sealed using a sealing member 80 to form a sealed space 210 within the test furnace 20. The temperature and atmosphere within the furnace are controlled to melt the salt and form molten salt, achieving the conditions for a high-temperature molten salt test. The test components 10 containing samples are then replaced with the sealing member 80, and the test furnace 20 is heated to the test temperature using a heating member 30 to conduct the test, obtaining multiple samples under the same test environment.

[0057] In some embodiments, step S40 may further include the following steps: S41: the sample is brought into contact with molten salt for testing, and the test assembly 10 and the sample are removed at the time required for the test, and the test furnace 20 is sealed with the sealing member 80 to maintain the sealing state and temperature stability of the sealed space 210; S42: after the sample is removed and cooled, the test results of the sample are determined.

[0058] This setup allows samples to be placed in different test components 10 according to the different corrosion test durations, while samples with the same corrosion test duration are placed in the same test component 10. When a sample in a certain test component 10 reaches its test duration, that test component 10 is sampled separately, while the other test components 10 continue to be tested. This enables multiple samples to be tested for different corrosion durations simultaneously under the same test environment. At the same time, after a single test component 10 is removed, it can be sealed to the test furnace 20 using a sealing component 80, thereby shortening the unsealed time of the sealed space 210 during sampling and minimizing the impact on the test environment inside the sealed space 210 and the samples in other test components 10.

[0059] In some embodiments, in step S41, the molten salt that the sample contacts can be a molten salt body or molten salt vapor.

[0060] This setup allows for the simulation of different environments using molten salt bodies or molten salt vapors, enabling the determination of corrosion conditions for samples under varying experimental conditions.

[0061] The technical solution of the present invention will be further described below with reference to specific embodiments. Six alloys—Inconel 625, Inconel 693, 230, 800H, 316H, and 321—were selected as test samples for corrosion tests in a high-temperature molten salt environment. The chloride salt used in the test was used to simulate highly radioactive waste salt slag, and its formulation was as follows: 42.12% KCl, 35.76%... 4.98% NaCl, 5.97% 5.97% And 5.2% of other chlorides.

[0062] Each sample blank required for the test is processed to form a block with a length of 10.5 mm, a width of 10.5 mm, and a thickness of 10.5 mm. A cylinder with a diameter of 5 mm and a height of 10.5 mm is hollowed out from the center of the block as a sample, so that the sample can be placed into the sample carrier 12 of the test device.

[0063] The test surface of the cut sample is polished by using sandpaper of 60#, 240#, 500#, 1000#, 1500# and 2000# in sequence, and then polished until a mirror finish is achieved.

[0064] After polishing, the sample is cleaned by rinsing to remove residual impurities from the test surface. The sample is then vibrated and polished to remove the mechanically hardened layer on its surface. Finally, it is soaked in alcohol for cleaning and dried with cold air to obtain the prepared sample.

[0065] Five test components 10 were selected. The sample carrier 12 of each test component 10 was filled with the six prepared samples. A ceramic isolation sheet with a thickness of 2 mm was inserted between adjacent samples to prevent galvanic corrosion or material dissolution due to contact between different samples during high-temperature corrosion, and to prevent molten salt from seeping into the sample gaps and causing adhesion after cooling.

[0066] Select five containers 50 and fill them with the aforementioned mixed chloride salt, ensuring that the salt volume is sufficient to submerge the sample after melting.

[0067] Place the salt-filled container 50 into the container limiting member 23 in the test furnace 20, install the sealing member 80 to seal the test furnace 20, and use the heating component 30 to heat the test furnace 20 to 950°C and maintain this temperature until the salt completely melts to form molten salt.

[0068] Remove the corresponding sealing member 80 from each container 50, replace it with the test assembly 10, and slowly insert the sample carrier 12 into the corresponding container 50 to completely immerse the sample in the molten salt, then start timing. Samples can be taken at 6h, 12h, 24h, 48h, and 96h of the test. After the corresponding time is reached, the test assembly 10 for that time is removed sequentially and sealed with the sealing member 80 to maintain the test environment inside the test furnace 20.

[0069] After the removed samples cooled to room temperature, the corrosion product layer was retained, and the corroded surface and cross-section of each sample were polished. After polishing, the corrosion morphology on the sample surface and the distribution of corrosion products on the cross-section were observed. The composition of the corrosion products was analyzed and the phase composition of the products was identified to evaluate the corrosion rate and corrosion resistance mechanism of different alloys in the molten salt environment.

[0070] Furthermore, the corrosion of the sample in a highly radioactive chloride waste salt volatilization atmosphere can be simulated using the same method as described above, and compared with the corrosion of the sample inside molten salt to determine the influence of different corrosion environments on the alloy properties. See also Figure 8 , Figure 8 This is a corrosion rate curve of samples obtained using the testing apparatus and methods of the embodiments of this application under different corrosive environments. Both Inconel 693 and Inconel 625 alloys exhibit typical parabolic corrosion kinetics, and the curves clearly reflect the differences in corrosion resistance between the two samples in different environments. In both molten salt interiors and molten salt atmospheres, Inconel 693 exhibits superior corrosion resistance compared to Inconel 625; similarly, the same sample material shows better corrosion resistance in a molten salt atmosphere than in molten salt interiors.

[0071] Regarding the embodiments of this application, it should also be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A testing apparatus suitable for corrosion testing in a high-temperature molten salt environment, characterized in that, It includes: The test furnace, heating assembly, temperature measuring assembly, air inlet, air outlet, multiple containment components, and multiple test components; The test furnace is configured to form a sealed space; The heating component is configured to provide a high-temperature environment for the sealed space. The temperature measuring component is configured to determine the temperature of the high-temperature environment. The heating component is also configured to control the temperature of the high-temperature environment based on the temperature determined by the temperature measuring component, so as to keep the temperature stable during the test. The air intake is configured to deliver gas into the sealed space to regulate the test atmosphere within the sealed space. The gas outlet is configured to deliver the gas in the sealed space to the outside, so as to replace the gas in the sealed space; Each of the aforementioned receptacles is disposed in the sealed space and configured to accommodate the molten salt; Each of the test components is configured to allow the test sample to react with the molten salt in the containment within the sealed space.

2. The apparatus according to claim 1, characterized in that, The test assembly is configured to hold the sample so that the sample can come into contact with the molten salt and react. The test assembly is also configured to be controllably and sealably connected to the test furnace, so that after the sample is placed from outside the test furnace into the sealed space and comes into contact with the molten salt in the container, the sealed space can be formed inside the test furnace.

3. The apparatus according to claim 2, characterized in that, The test assembly includes connectors and sample carriers; The connector is detachably connected to the sample carrier. The sample carrier is configured to hold multiple samples, so that each sample can come into contact with the molten salt and react. The connector is configured to be controllably and sealingly connected to the test furnace so that a sealed space is formed inside the test furnace after the sample comes into contact with the molten salt.

4. The apparatus according to claim 3, characterized in that, The connector has a sealing portion formed thereon so that when the sample comes into contact with the molten salt, the sealing portion can be sealed and connected to the test component mounting hole of the test furnace.

5. The apparatus according to claim 1, characterized in that, The test furnace includes a furnace body, a furnace cover, and a accommodating and limiting component. The furnace cover is configured to seal the furnace body to form the sealed space; The accommodating limiting member is disposed inside the furnace body and is configured to limit the position of each accommodating member.

6. The apparatus according to claim 5, characterized in that, The furnace cover has a mounting portion to allow the air inlet, the air outlet and the temperature measuring component to be sealed and mounted on the furnace cover, and each of the test components to be controllably sealed and mounted on the furnace cover.

7. The apparatus according to claim 5, characterized in that, The furnace body is provided with a water-cooling groove to prevent the seals of the furnace cover from failing at high temperatures.

8. The apparatus according to claim 5, characterized in that, The receiving and limiting member has multiple limiting grooves, and the inner side of each limiting groove cooperates with the outer side of each receiving member to limit the position of each receiving member.

9. The apparatus according to any one of claims 1-8, characterized in that, The test furnace also includes multiple sealing components; Each of the sealing elements is configured to be controllably and sealingly connected to the test component mounting hole of the test furnace, so that the sealing space can be kept sealed when the heating component heats the test furnace.

10. The apparatus according to claim 1, characterized in that, The heating assembly includes a heating element and a temperature control element; The heating element is configured to accommodate the furnace body of the test furnace and heat the furnace body, providing a high-temperature environment for the furnace body; The temperature control component is configured to control the heating temperature of the heating element based on the temperature determined by the temperature measuring component, so as to stabilize the temperature during the test.

11. The apparatus according to claim 1, characterized in that, The temperature measuring component includes a temperature measuring element and a protective element; The protective component is installed on the furnace cover of the test furnace and is configured to protect the temperature measuring component under the high-temperature environment; The temperature measuring element is configured to enter the sealed space through the protective element in order to determine the temperature of the high-temperature environment.

12. A test method, characterized in that, A corrosion test in a high-temperature molten salt environment using the test apparatus as described in any one of claims 1-11 includes the following steps: S10: Prepare the required number of containers and test components of the test apparatus for the test, place the salt required for the test into the containers, and place the test sample into the test components; S20: The receiving component is placed into the receiving and limiting component of the test device, and the test furnace of the test device is sealed by the multiple sealing components of the test device to form a sealed space inside the test furnace; S30: The testing furnace is heated using the heating component of the testing device to melt the salt in the container to form molten salt, and the temperature and atmosphere inside the testing furnace are controlled using the heating component, air inlet and air outlet of the testing device. S40: After the molten salt is formed, the sealing element is replaced by the test assembly containing the sample, and the test furnace is heated to the test temperature using the heating assembly to perform the test; S50: After the test is completed, remove the test components and the sample, stop heating, and remove the container from the test furnace.

13. The method according to claim 12, characterized in that, In step S40, the step of conducting the experiment further includes the following steps: S41: The sample is brought into contact with the molten salt for testing, and the test components and the sample are removed at the time points required for the test. The test furnace is sealed using the sealing component to maintain the sealing state of the sealed space and the temperature stability. S42: After the sample to be removed has cooled, the test results of the sample are determined.

14. The method according to claim 13, characterized in that, In step S41, the step of contacting the sample with the molten salt refers to the molten salt being contacted by the sample as either a molten salt body or molten salt vapor.

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