High-temperature molten salt corrosion testing device and method

Abstract

The invention discloses a high-temperature molten salt corrosion testing device and method.The high-temperature molten salt corrosion testing device comprises an environment simulation testing container, detection equipment and a corrosion inhibition gas generator, and the corrosion inhibition gas generator is communicated with the environment simulation testing container; the to-be-tested sample can be subjected to an evaluation test on the corrosion resistance in the high-temperature liquid molten salt; the corrosion inhibition gas generated by the corrosion inhibition gas generator can be adjusted and controlled, so that a certain flow of corrosion inhibition gas is controlled to enter the environment simulation test container according to the impurity content, the influence of impurities is eliminated, and the accuracy of the corrosion resistance evaluation test is further improved; or the flow of the corrosion inhibition gas entering the environment simulation test container is regulated and controlled, and part of impurities in the environment simulation test container are eliminated, so that the corrosion resistance under the condition of different impurity contents is evaluated.

Description

Technical Field

[0001] This invention relates to the technical field of corrosion testing, and in particular to a high-temperature molten salt corrosion testing device and method. Background Technology

[0002] Molten salts are used as heat transfer media in molten salt reactors and energy storage projects due to their high operating temperature, strong heat transfer capacity, and low system pressure. However, high-temperature molten salts, especially high-temperature chloride molten salts, are highly corrosive. Poor control of materials, environment, and process parameters can lead to corrosion failure of equipment and devices. Therefore, extensive research on molten salt corrosion has been conducted both domestically and internationally. Related testing devices can be mainly divided into three categories: static molten salt systems, dynamic molten salt systems, and corrosion testing devices that assess the interaction between molten salt and mechanical processes. Static molten salt system testing devices are generally simpler, while dynamic molten salt system and mechanical-molten salt interaction testing devices vary considerably depending on their function.

[0003] Previous studies have shown that iron-based austenitic stainless steel will suffer significant corrosion in high-temperature chloride molten salts due to the influence of water and oxygen impurities. However, by using reducing gases to preferentially react with water and oxygen in the container to generate oxides, the corrosion of the container's metal matrix by water and oxygen impurities can be blocked.

[0004] The gas entering the test container from the outside contains some impurities, such as water and oxygen. These impurities act on the metal test sample and the equipment connected to the test container, thus affecting the evaluation results of the corrosion resistance test of the test sample and the life of each piece of equipment. In addition, since the impurity content is uncontrollable, the impurity content cannot be actively adjusted according to the purpose of the test to evaluate the corrosion resistance performance of the sample under a certain impurity content. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, which cannot adjust the test atmosphere, cannot accurately obtain the corrosion resistance of the sample in the molten salt environment, and cannot meet the corrosion resistance of the sample under different atmosphere conditions, and to provide a high-temperature molten salt corrosion testing device and method.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A high-temperature molten salt corrosion testing device, comprising:

[0008] An environmental simulation test container contains high-temperature liquid molten salt and a test sample that is at least partially immersed in the high-temperature liquid molten salt;

[0009] The testing equipment is used to detect the content of impurities in the gas entering the environmental simulation test container that can corrode the test sample.

[0010] A corrosion-inhibiting gas generator is connected to an environmental simulation test container. The corrosion-inhibiting gas generator is used to generate corrosion-inhibiting gas and adjusts the flow rate of the corrosion-inhibiting gas entering the environmental simulation test container according to the detected impurity content, so as to inhibit the corrosive effect of impurities on the test sample.

[0011] In this scheme, the high-temperature molten salt corrosion testing device simulates the application environment through an environmental simulation test container, allowing the test sample to undergo corrosion resistance evaluation testing in high-temperature liquid molten salt. The testing equipment can accurately detect the impurity content in the environmental simulation test container. The corrosion-inhibiting gas generated by the corrosion-inhibiting gas generator can be regulated and controlled to allow a specific flow rate of corrosion-inhibiting gas to enter the environmental simulation test container based on the impurity content. This gas reacts with the impurities in the container, eliminating their influence on the corrosion resistance test and thus improving the accuracy of the corrosion resistance evaluation test. Alternatively, the flow rate of the corrosion-inhibiting gas entering the environmental simulation test container can be adjusted to eliminate some impurities, allowing for the evaluation of corrosion resistance under different impurity content conditions. This enhances the diversity and flexibility of corrosion resistance testing.

[0012] Preferably, the high-temperature molten salt corrosion testing device also includes several devices connected to the environmental simulation testing container at different locations, and all of these devices are connected to the corrosion inhibition gas generator.

[0013] In this solution, all of the aforementioned devices are connected to a corrosion-inhibiting gas generator. The corrosion-inhibiting gas generated by the generator reacts with impurities (such as water and oxygen) that affect the corrosion resistance of the devices, thereby protecting the devices and extending their service life. At the same time, it can also eliminate impurities from the external environment that could corrode the test samples when they enter the aforementioned devices, avoiding their introduction into the environmental simulation test container, thus ensuring the accuracy of the corrosion resistance.

[0014] Preferably, isolation valves and / or flow meters are installed on the connecting pipelines of several devices and the corrosion inhibiting gas generator. The isolation valves are used to open or close the connecting pipelines, and the flow meters are used to measure the flow rate of the corrosion inhibiting gas entering the several devices.

[0015] In this scheme, the aforementioned isolation valve facilitates the control of the amount of corrosion-inhibiting gas entering the equipment, and the aforementioned flow meter facilitates the measurement of the flow rate of corrosion-inhibiting gas entering several devices, so as to provide a basis for opening or closing the isolation valve.

[0016] Preferably, the plurality of devices include a sampler, the sampler including a sample inlet / outlet channel connected to the environmental simulation test container, the sample inlet / outlet channel being provided with a sampler ball valve, and the sampler ball valve dividing the sample inlet / outlet channel into an upper channel and a lower channel, and isolating the upper channel and the lower channel when the sample to be tested is tested;

[0017] The high-temperature molten salt corrosion testing device also includes a protective gas supply source connected to the upper channel; and a corrosion inhibition gas generator connected to the lower channel.

[0018] In this scheme, a sampler ball valve is installed between the upper and lower channels to prevent impurities such as water and oxygen from the external environment from entering the environmental simulation test container during sample loading, thereby disrupting the corrosive environment of the environmental simulation test container. This further improves the accuracy of testing the corrosion resistance of the sample in the molten salt environment. A protective gas supply source is connected to the upper channel, allowing all the gas in the sampler and environmental simulation test container to be replaced with protective gas before testing, providing a protective atmosphere for the sample during the test to accurately assess its corrosion resistance in high-temperature liquid molten salt. A corrosion-inhibiting gas generator is connected to the lower channel, allowing corrosion-inhibiting gas to be introduced into the lower channel and environmental simulation test container after the sampler ball valve isolates the upper and lower channels.

[0019] Preferably, the protective gas supply source includes a first outlet and a second outlet, the first outlet being connected to the upper channel and the second outlet being connected to the corrosion inhibitor gas generator.

[0020] In this scheme, the above-mentioned setup allows the protective gas supply source to be shared. On the one hand, it can provide protective gas to the environmental simulation test container to create a stable test environment. On the other hand, it can generate corrosion inhibitor gas together with the corrosion inhibitor gas generator, achieving two goals at once.

[0021] Preferably, the protective gas supply source contains an inert gas, and the corrosion inhibitor gas generator contains metal particles. The inert gas and metal particles are mixed and heated to generate a corrosion inhibitor gas.

[0022] The inert gas and metal particles are set to be adjusted in a predetermined ratio.

[0023] In this scheme, the protective gas can be mixed with metal particles in the corrosion inhibitor generator and heated to generate corrosion inhibitor gas, or it can be introduced into the environmental simulation test container alone. When the corrosion inhibitor gas enters the environmental simulation test container, it easily reacts with impurities such as oxygen and water to generate oxides, thereby reducing the content of impurities that can corrode the test sample. The inert gas and metal particles are set to be adjusted in a set ratio, and the flow rate of the corrosion inhibitor gas can be adjusted according to the impurity content.

[0024] Preferably, the plurality of devices include a molten salt driving device configured to drive the flow of high-temperature liquid molten salt in an environment simulation test container to simulate the dynamic molten salt movement environment of the sample under test in real working conditions.

[0025] In this scheme, the molten salt driving device can simulate the dynamic molten salt movement environment of the test sample under real working conditions, so as to improve the accuracy of testing the corrosion resistance of the test sample under real working conditions.

[0026] Preferably, the molten salt drive device includes a power source, an output shaft, and an impeller. The output shaft is connected between the power source and the impeller. The power source is located outside the environmental simulation test container, and the output shaft automatically extends into the interior of the environmental simulation test container. The impeller is immersed in high-temperature liquid molten salt.

[0027] The power source drives the output shaft to rotate, and the output shaft drives the impeller to rotate, thereby driving the high-temperature liquid molten salt to flow inside the environmental simulation test container.

[0028] In this scheme, the power source is located outside the environmental simulation test container to prevent the high temperature in the environmental simulation test container from affecting the performance of the power source; the impeller is immersed in high-temperature liquid molten salt to ensure that the high-temperature liquid molten salt flows fully.

[0029] Preferably, the high-temperature molten salt corrosion testing device also includes an exhaust gas treatment device, which is connected to the environmental simulation testing container and also connected to the upper channel.

[0030] In this scheme, the exhaust gas treatment device enables the exhaust gas from the aforementioned sampler and environmental simulation test container to be discharged into the external environment without pollution.

[0031] This invention also provides a high-temperature molten salt corrosion testing method. The high-temperature molten salt corrosion testing method utilizes the aforementioned high-temperature molten salt corrosion testing device to perform corrosion resistance testing on the sample to be tested. The high-temperature molten salt corrosion testing method includes the following steps:

[0032] S1. Place the sample to be tested and the molten salt into an environmental simulation test container, heat the molten salt into a high-temperature liquid molten salt, and immerse at least part of the sample to be tested in the high-temperature liquid molten salt;

[0033] S2. Use testing equipment to detect the content of impurities in the gas of the environmental simulation test container that can cause corrosion to the test sample;

[0034] S3. Use a corrosion inhibiting gas generator to generate corrosion inhibiting gas, and adjust the flow rate of the corrosion inhibiting gas entering the environmental simulation test container according to the impurity content detected by the testing equipment, so as to inhibit the corrosive effect of impurities on the test sample.

[0035] In this scheme, the high-temperature molten salt corrosion test method simulates the application environment through the environmental simulation test container in step S1, so that the test sample is subjected to corrosion test in a high-temperature liquid molten salt environment to evaluate the corrosion resistance of the test sample in the high-temperature liquid molten salt environment; in step S2, the impurity content in the environmental simulation test container is accurately detected by the detection equipment; in step S3, corrosion inhibition gas is generated by the corrosion inhibition gas generator, and the flow rate of the corrosion inhibition gas entering the environmental simulation test container is adjusted according to the impurity content detected in step S2 to eliminate the influence of impurities on the corrosion resistance test, thereby accurately controlling the corrosion intensity of the test sample in the high-temperature liquid molten salt environment, so as to accurately test the corrosion resistance of the test sample.

[0036] Preferably, the high-temperature molten salt corrosion testing device also includes several devices connected to the environmental simulation test container at different locations, and all of these devices are connected to a corrosion inhibition gas generator; isolation valves and / or flow meters are installed on the connecting pipelines between the devices and the corrosion inhibition gas generator;

[0037] Step S3, "adjusting the flow rate of the corrosion inhibitor gas entering the environmental simulation test container," specifically includes:

[0038] The opening or closing of corrosion-inhibiting gas from the corrosion-inhibiting gas generator into the environmental simulation test container is controlled by using an isolation valve, and / or the flow rate of corrosion-inhibiting gas entering the environmental simulation test container and / or several devices is measured by using a flow meter.

[0039] In this scheme, the aforementioned isolation valve facilitates the control of the amount of corrosion-inhibiting gas entering the equipment, and the aforementioned flow meter facilitates the measurement of the flow rate of corrosion-inhibiting gas entering several devices, so as to provide a basis for opening or closing the isolation valve.

[0040] Preferably, the high-temperature molten salt corrosion test method further includes:

[0041] Drive the environment to simulate the flow of high-temperature liquid molten salt in a test container.

[0042] In this scheme, the above method enables the high-temperature liquid molten salt to be in a flowing state, which is closer to the corrosion environment and corrosion intensity of the application environment of the sample to be tested.

[0043] The positive and progressive effects of this invention are as follows: This high-temperature molten salt corrosion testing device simulates the application environment through an environmental simulation testing container, allowing the test sample to undergo corrosion resistance evaluation testing in high-temperature liquid molten salt; the testing equipment can accurately detect the impurity content in the environmental simulation testing container; thus, the corrosion inhibiting gas generated by the corrosion inhibiting gas generator can be regulated and controlled to allow a certain flow rate of corrosion inhibiting gas to enter the environmental simulation testing container according to the impurity content, reacting with the impurities in the environmental simulation testing container, eliminating the influence of impurities on corrosion resistance testing, and thereby improving the accuracy of corrosion resistance evaluation testing; or the flow rate of corrosion inhibiting gas entering the environmental simulation testing container can be adjusted to eliminate some impurities in the environmental simulation testing container, so as to evaluate the corrosion resistance under different impurity content conditions, thereby improving the diversity and flexibility of corrosion resistance testing. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a high-temperature molten salt corrosion testing device according to an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] High-temperature molten salt corrosion testing device 100

[0047] Environment simulation test container 1

[0048] High-temperature liquid molten salt 11

[0049] 12 samples to be tested

[0050] High temperature furnace 13

[0051] Reactor 14

[0052] Backup equipment 2

[0053] Corrosion Inhibiting Gas Generator 3

[0054] Connecting pipe 4

[0055] Isolation valve 41

[0056] Flow meter 42

[0057] Sampler 5

[0058] Upper Channel 51

[0059] Lower Channel 52

[0060] Sampler ball valve 53

[0061] Protective gas supply source 6

[0062] Molten salt drive unit 7

[0063] Power Source 71

[0064] Output shaft 72

[0065] Impeller 73

[0066] Exhaust gas treatment equipment 8 Detailed Implementation

[0067] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0068] like Figure 1 As shown, this embodiment provides a high-temperature molten salt corrosion testing device 100, which includes: an environmental simulation testing container 1, which contains high-temperature liquid molten salt 11 and a test sample 12 at least partially immersed in the high-temperature liquid molten salt 11; a detection device, which is used to detect the content of impurities in the gas entering the environmental simulation testing container 1 that can corrode the test sample 12; and a corrosion inhibition gas generator 3, which is connected to the environmental simulation testing container 1 and is used to generate corrosion inhibition gas and adjust the flow rate of the corrosion inhibition gas entering the environmental simulation testing container 1 according to the detected impurity content, so as to inhibit the impurities from corroding the test sample 12.

[0069] In this embodiment, the high-temperature molten salt corrosion testing device 100 simulates the application environment through an environmental simulation testing container 1, allowing the sample 12 to be tested to undergo corrosion resistance evaluation testing in high-temperature liquid molten salt 11. The testing equipment can accurately detect the impurity content in the environmental simulation testing container 1. Thus, the corrosion inhibiting gas generated by the corrosion inhibiting gas generator 3 can be regulated and controlled to allow a certain flow rate of corrosion inhibiting gas to enter the environmental simulation testing container 1 according to the impurity content, reacting with the impurities in the environmental simulation testing container 1 to eliminate the influence of impurities on the corrosion resistance test, thereby improving the accuracy of the corrosion resistance evaluation test. Alternatively, the flow rate of the corrosion inhibiting gas entering the environmental simulation testing container 1 can be adjusted to eliminate some impurities in the environmental simulation testing container 1, thereby evaluating the corrosion resistance under different impurity content conditions, thus improving the diversity and flexibility of the corrosion resistance test.

[0070] It should be noted that the above-mentioned testing equipment is a backup tube (not shown in the attached diagram), which is used for long-term monitoring and surveillance of the gas composition in the environmental simulation test container 1; the corrosion inhibitor gas is generated by reacting with impurities such as water and oxygen to produce oxides that do not corrode the test sample 12, thereby inhibiting the corrosive effect of impurities on the test sample 12; in addition, the environmental simulation test container 1 includes a reaction vessel 14 and a high-temperature furnace 13. The reaction vessel 14 contains molten salt, and the high-temperature furnace 13 is used to heat the molten salt in the reaction vessel 14 into a high-temperature liquid molten salt 11, and the above-mentioned oxides dissolve in the high-temperature liquid molten salt 11 or adhere to the inner wall of the reaction vessel 14.

[0071] Furthermore, it should be noted that the corrosion inhibiting gas generator 3 includes a steel tank and a heating system. The metal particles are placed in the steel tank, and the heating system is used to regulate the temperature of the connecting pipe 4. Specifically, the temperature of the connecting pipe 4 is heated by a heating cable, and each connecting pipe 4 has an independent channel for temperature control, an integrated temperature control cabinet, and a touch screen. The heating system is not shown in the attached drawings. Both the reactor 14 and the corrosion inhibiting gas generator 3 are integrated heating furnaces, equipped with independent programmable temperature control cabinets. The high-temperature molten salt corrosion testing device 100 is also equipped with a safety unit, which automatically alarms and provides power-off protection when the temperature runs out of control. The safety unit is also not shown in the attached drawings.

[0072] The reactor 14 is a cylindrical body welded from stainless steel coils, with welded seals at both ends. The top cover of the reactor 14 is mainly equipped with a power source 71 (in this embodiment, a motor pump), a sampler 5, a corrosion-inhibiting gas inlet pipe, an outlet pipe, a thermocouple, and a level gauge tube.

[0073] like Figure 1 As shown, the high-temperature molten salt corrosion testing device 100 also includes several devices connected to the environmental simulation testing container 1 at different locations, and all of these devices are connected to the corrosion inhibition gas generator 3.

[0074] In this embodiment, all of the above-mentioned devices are connected to the corrosion inhibition gas generator 3. The corrosion inhibition gas generated by the corrosion inhibition gas generator 3 reacts with impurities (such as water and oxygen) that affect the corrosion resistance of the devices, thereby protecting the devices and improving their service life. At the same time, it can also eliminate the entry of external environment impurities in the above-mentioned devices that can cause corrosion to the test sample 12, and avoid introducing them into the environmental simulation test container 1, thereby ensuring the accuracy of corrosion resistance.

[0075] It should be noted that several devices are connected to the corrosion inhibitor gas generator 3 through different connecting pipes 4.

[0076] like Figure 1As shown, several devices are connected to the corrosion inhibitor gas generator 3 via a connecting pipeline 4 equipped with an isolation valve 41 and / or a flow meter 42. The isolation valve 41 is used to open or close the connecting pipeline 4, and the flow meter 42 is used to measure the flow rate of the corrosion inhibitor gas entering the several devices.

[0077] In this embodiment, the isolation valve 41 is provided to facilitate control of the amount of corrosion-inhibiting gas entering the equipment, and the flow meter 42 is provided to facilitate the measurement of the flow rate of corrosion-inhibiting gas entering several devices, so as to provide a basis for opening or closing the isolation valve 41.

[0078] It should be noted that in this embodiment, the flow meter 42 is only installed on the connecting pipe 4 between the environmental simulation test container 1, the sampler 5, the molten salt drive device 7 and the corrosion inhibition gas generator 3; in other embodiments, the flow meter 42 can be installed on several devices and on the connecting pipe 4 between the corrosion inhibition gas generator 3.

[0079] like Figure 1 As shown, several devices include a sampler 5, which includes a sample inlet / outlet channel connected to the environmental simulation test container 1. A sampler ball valve 53 is provided in the sample inlet / outlet channel, and the sampler ball valve 53 divides the sample inlet / outlet channel into an upper channel 51 and a lower channel 52, and isolates the upper channel 51 and the lower channel 52 when the sample 12 to be tested is tested. The high-temperature molten salt corrosion test device 100 also includes a protective gas supply source 6, which is connected to the upper channel 51. A corrosion inhibition gas generator 3 is connected to the lower channel 52.

[0080] In this embodiment, a sampler ball valve 53 is installed between the upper channel 51 and the lower channel 52 to prevent impurities such as water and oxygen from the external environment from entering the environmental simulation test container 1 during sample loading, thereby damaging the corrosive environment of the environmental simulation test container 1. This further improves the accuracy of testing the corrosion resistance of the sample 12 in the molten salt environment. The protective gas supply source 6 is connected to the upper channel 51, which can replace all the gas in the sampler 5 and the environmental simulation test container 1 with protective gas before the test, providing a protective atmosphere for the sample 12 during the test to accurately evaluate the corrosion resistance of the sample 12 in the high-temperature liquid molten salt 11. The corrosion inhibition gas generator 3 is connected to the lower channel 52, so that after the sampler ball valve 53 isolates the upper channel 51 and the lower channel 52, corrosion inhibition gas is input into the lower channel 52 and the environmental simulation test container 1.

[0081] It should be noted that the sampler ball valve 53 mainly controls the entry of water and oxygen into the lower channel 52 and the environmental simulation test container 1; in addition, the sampler 5 is made of stainless steel and provides an inert environment by evacuating and filling the environmental simulation test container 1 when connected to it.

[0082] like Figure 1 As shown, the protective gas supply source 6 includes a first outlet and a second outlet. The first outlet is connected to the upper channel 51, and the second outlet is connected to the corrosion inhibitor gas generator 3.

[0083] In this embodiment, the above-mentioned arrangement enables the protective gas supply source 6 to be shared. On the one hand, it can provide protective gas to the environmental simulation test container 1 to create a stable test environment. On the other hand, it can generate corrosion inhibitor gas together with the corrosion inhibitor gas generator 3, achieving two goals at once.

[0084] like Figure 1 As shown, the protective gas supply source 6 contains an inert gas, and the corrosion inhibitor gas generator 3 contains metal particles. The inert gas and metal particles are mixed and heated to generate corrosion inhibitor gas. The inert gas and metal particles are set to be adjusted in a set ratio.

[0085] In this embodiment, the protective gas can be mixed with the metal particles in the corrosion inhibitor gas generator 3 and heated to generate corrosion inhibitor gas, or it can be introduced into the environmental simulation test container 1 separately. When the corrosion inhibitor gas enters the environmental simulation test container 1, it is easy to generate oxides with impurities such as oxygen and water, thereby reducing the content of impurities that can corrode the test sample 12. The inert gas and metal particles are set to be adjusted in a set ratio, and the flow rate of the generated corrosion inhibitor gas can be adjusted according to the impurity content.

[0086] It should be noted that in this embodiment, the inert gas is argon, and impurities such as water and oxygen in the argon will also enter the environmental simulation test container 1. The corrosion inhibitor actually works by heating the metal vapor generated by the metal particles. In other words, the metal particles are set to a set ratio that can determine the amount of impurities in the environmental simulation test container 1.

[0087] like Figure 1 As shown, several devices include a molten salt drive device 7, which is configured to drive the flow of high-temperature liquid molten salt 11 in the environment simulation test container 1 to simulate the dynamic molten salt movement environment of the sample 12 under real working conditions.

[0088] In this embodiment, the molten salt driving device 7 can simulate the dynamic molten salt movement environment of the test sample 12 under real working conditions, so as to improve the accuracy of testing the corrosion resistance of the test sample 12 under real working conditions.

[0089] like Figure 1As shown, it should be noted that several devices also include backup device 2. Backup device 2 is located between molten salt drive device 7 and sampler, and is also connected to corrosion inhibition gas generator and environmental simulation test container 1. Backup device 2 is added according to specific test requirements and is not limited to a certain type of device.

[0090] like Figure 1 As shown, the molten salt driving device 7 includes a power source 71, an output shaft 72, and an impeller 73. The output shaft 72 is connected between the power source 71 and the impeller 73. The power source 71 is located outside the environmental simulation test container 1, and the output shaft 72 extends from the power source 71 into the interior of the environmental simulation test container 1. The impeller 73 is immersed in the high-temperature liquid molten salt 11. The power source 71 drives the output shaft 72 to rotate, and the output shaft 72 drives the impeller 73 to rotate, thereby driving the high-temperature liquid molten salt 11 to flow inside the environmental simulation test container 1.

[0091] In this embodiment, the power source 71 is located outside the environmental simulation test container 1 to prevent the high temperature in the environmental simulation test container 1 from affecting the performance of the power source 71; the impeller 73 is immersed in the high temperature liquid molten salt 11 to allow the high temperature liquid molten salt 11 to flow fully.

[0092] It should be noted that the molten salt driving device 7 can also be other structures that enable the high-temperature liquid molten salt 11 to flow, such as using a pump structure to repeatedly pump the high-temperature liquid molten salt 11. When the molten salt driving device 7 is working, it obtains dynamic high-temperature liquid molten salt 11, and when it is not working, the high-temperature liquid molten salt 11 is in a static state.

[0093] like Figure 1 As shown, the high-temperature molten salt corrosion testing device 100 also includes an exhaust gas treatment device, which is connected to the environmental simulation testing container 1 and also connected to the upper channel 51.

[0094] In this embodiment, the exhaust gas treatment device 8 enables the exhaust gas from the sampler 5 and the environmental simulation test container 1 to be discharged into the external environment without pollution.

[0095] It should be noted that the aforementioned exhaust gas is adsorbed, filtered, and neutralized by the exhaust gas treatment device 8 after entering the exhaust gas treatment device 8.

[0096] The present invention also provides a high-temperature molten salt corrosion test method. The high-temperature molten salt corrosion test method utilizes the aforementioned high-temperature molten salt corrosion test apparatus 100 to conduct a corrosion resistance test on the sample 12 to be tested. The high-temperature molten salt corrosion test method includes the following steps:

[0097] S1. Place the test sample 12 and molten salt into the environmental simulation test container 1, heat the molten salt into high-temperature liquid molten salt 11, and immerse at least part of the test sample 12 into the high-temperature liquid molten salt 11;

[0098] S2. Use testing equipment to detect the content of impurities in the gas of the environmental simulation test container 1 that can cause corrosion to the test sample 12;

[0099] S3. Use corrosion inhibitor gas generator 3 to generate corrosion inhibitor gas, and adjust the flow rate of corrosion inhibitor gas entering the environmental simulation test container 1 according to the impurity content detected by the testing equipment, so as to inhibit the corrosion effect of impurities on the test sample 12.

[0100] In this embodiment, the high-temperature molten salt corrosion test method simulates the application environment in the environmental simulation test container 1 in step S1, so that the sample to be tested is subjected to corrosion test in the high-temperature liquid molten salt 11 environment to evaluate the corrosion resistance of the sample to be tested in the high-temperature liquid molten salt 11 environment; in step S2, the impurity content in the environmental simulation test container is accurately detected by the detection equipment; in step S3, corrosion inhibition gas can be generated by the corrosion inhibition gas generator 3, and the flow rate of the corrosion inhibition gas entering the environmental simulation test container 1 is adjusted according to the impurity content detected in step S2 to eliminate the influence of impurities on the corrosion resistance test, thereby accurately controlling the corrosion intensity of the sample to be tested in the high-temperature liquid molten salt 11 environment, so as to accurately test the corrosion resistance of the sample to be tested.

[0101] like Figure 1 As shown, the high-temperature molten salt corrosion testing device 100 also includes several devices connected to the environmental simulation test container 1 at different locations, and all of these devices are connected to the corrosion inhibition gas generator 3; isolation valves 41 and / or flow meters 42 are installed on the connecting pipes 4 between the devices and the corrosion inhibition gas generator 3; the step S3 of "adjusting the flow rate of corrosion inhibition gas entering the environmental simulation test container 1" specifically includes: using the isolation valve 41 to control the opening or closing of the corrosion inhibition gas flowing from the corrosion inhibition gas generator 3 into the environmental simulation test container 1, and / or using the flow meter 42 to measure the flow rate of corrosion inhibition gas entering the environmental simulation test container 1 and / or the devices.

[0102] In this embodiment, the isolation valve 41 is provided to facilitate control of the amount of corrosion-inhibiting gas entering the equipment, and the flow meter 42 is provided to facilitate the measurement of the flow rate of corrosion-inhibiting gas entering several devices, so as to provide a basis for opening or closing the isolation valve 41.

[0103] like Figure 1 As shown, the high-temperature molten salt corrosion test method also includes: driving the flow of high-temperature liquid molten salt 11 in the environmental simulation test container 1.

[0104] In this embodiment, the above method enables the high-temperature liquid molten salt to be in a flowing state, which is closer to the corrosion environment and corrosion intensity of the application environment of the sample to be tested.

[0105] It should also be noted that among the components of the integrated verification device, the environmental simulation test container 1, sampler 5, and exhaust gas treatment device 8 in this application are all custom-made equipment. Since similar products have been designed and manufactured previously, the technology is relatively mature. The high-temperature furnace 13, steel tank, and heat tracing cable outside the reactor 14 are all relatively mature equipment and processed parts that can be purchased. In the development of this high-temperature molten salt corrosion testing device 100, the main tasks are to develop a molten salt pump protective cover, a specialized metal liquid level (i.e., the aforementioned metal vapor quantity) measuring instrument, and a chloride-resistant (i.e., the aforementioned high-temperature liquid molten salt 11) corrosion-resistant coating technology, respectively used for inert gas protection, measuring the amount of liquid metal, and providing outer wall coating protection for stainless steel materials. During the development process, the atmosphere of the molten salt pump protective cover (i.e., the aforementioned high-temperature liquid molten salt 11) and the metal vapor system are tested, different outer wall coating protection processes are compared, and then the chloride vapor phase corrosion inhibition problem is comprehensively verified.

[0106] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0107] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A high-temperature molten salt corrosion testing device, characterized in that, The high-temperature molten salt corrosion testing device includes: An environmental simulation test container, wherein the environmental simulation test container contains high-temperature liquid molten salt and a test sample at least partially immersed in the high-temperature liquid molten salt; The detection equipment is used to detect the content of impurities in the gas entering the environmental simulation test container that can corrode the sample to be tested; A corrosion-inhibiting gas generator is connected to the environmental simulation test container. The corrosion-inhibiting gas generator is used to generate corrosion-inhibiting gas and adjust the flow rate of the corrosion-inhibiting gas entering the environmental simulation test container according to the detected impurity content, so as to inhibit the corrosion effect of the impurities on the test sample.

2. The high-temperature molten salt corrosion testing device as described in claim 1, characterized in that, The high-temperature molten salt corrosion testing device also includes several devices connected to the environmental simulation testing container at different locations, and all of these devices are connected to the corrosion inhibition gas generator.

3. The high-temperature molten salt corrosion testing device as described in claim 2, characterized in that, An isolation valve and / or a flow meter are provided on the connecting pipeline between the plurality of devices and the corrosion inhibitor gas generator. The isolation valve is used to open or close the connecting pipeline, and the flow meter is used to measure the flow rate of the corrosion inhibitor gas entering the plurality of devices.

4. The high-temperature molten salt corrosion testing device as described in claim 2, characterized in that, The plurality of said devices include a sampler, the sampler including a sample inlet / outlet channel communicating with the environmental simulation test container, the sample inlet / outlet channel being provided with a sampler ball valve, and the sampler ball valve dividing the sample inlet / outlet channel into an upper channel and a lower channel, and isolating the upper channel and the lower channel during the testing of the sample to be tested; The high-temperature molten salt corrosion testing device also includes a protective gas supply source, which is connected to the upper channel; the corrosion inhibition gas generator is connected to the lower channel.

5. The high-temperature molten salt corrosion testing device as described in claim 4, characterized in that, The protective gas supply source includes a first outlet and a second outlet, the first outlet being connected to the upper channel and the second outlet being connected to the corrosion inhibitor gas generator.

6. The high-temperature molten salt corrosion testing device as described in claim 5, characterized in that, The protective gas supply source contains an inert gas, and the corrosion inhibitor gas generator contains metal particles. The inert gas and the metal particles are mixed and heated to generate the corrosion inhibitor gas. The inert gas and the metal particles are set to be adjusted in a predetermined ratio.

7. The high-temperature molten salt corrosion testing apparatus according to any one of claims 1-6, characterized in that, Several of the devices include a molten salt driving device configured to drive the flow of the high-temperature liquid molten salt in the environmental simulation test container to simulate the dynamic molten salt movement environment of the test sample under real working conditions.

8. The high-temperature molten salt corrosion testing apparatus as described in claim 7, characterized in that, The molten salt drive device includes a power source, an output shaft, and an impeller. The output shaft is connected between the power source and the impeller. The power source is located outside the environmental simulation test container. The output shaft extends from the power source to the inside of the environmental simulation test container. The impeller is immersed in the high-temperature liquid molten salt. The power source drives the output shaft to rotate, and the output shaft drives the impeller to rotate, thereby causing the high-temperature liquid molten salt in the environmental simulation test container to flow.

9. The high-temperature molten salt corrosion testing device as described in claim 4, characterized in that, The high-temperature molten salt corrosion testing device also includes an exhaust gas treatment device, which is connected to the environmental simulation testing container and also connected to the upper channel.

10. A high-temperature molten salt corrosion test method, characterized in that, The high-temperature molten salt corrosion test method utilizes the high-temperature molten salt corrosion test apparatus as described in any one of claims 1-9 to perform a corrosion resistance test on the sample to be tested. The high-temperature molten salt corrosion test method includes the following steps: S1. Place the test sample and molten salt into the environmental simulation test container, heat the molten salt into high-temperature liquid molten salt, and immerse at least a portion of the test sample in the high-temperature liquid molten salt; S2. Use the detection equipment to detect the content of impurities in the gas of the environmental simulation test container that can corrode the sample to be tested; S3. Use the corrosion inhibiting gas generator to generate corrosion inhibiting gas, and adjust the flow rate of the corrosion inhibiting gas entering the environmental simulation test container according to the impurity content detected by the testing equipment, so as to inhibit the impurities from corroding the sample to be tested.

11. The high-temperature molten salt corrosion test method as described in claim 10, characterized in that, The high-temperature molten salt corrosion testing device also includes several devices connected to the environmental simulation testing container at different locations, and all of the devices are connected to the corrosion inhibition gas generator; isolation valves and / or flow meters are installed on the connecting pipelines of the devices and the corrosion inhibition gas generator; The step S3, "adjusting the flow rate of the corrosion-inhibiting gas entering the environmental simulation test container," specifically includes: The isolation valve is used to control the opening or closing of the corrosion-inhibiting gas flowing from the corrosion-inhibiting gas generator into the environmental simulation test container, and / or the flow meter is used to measure the flow rate of the corrosion-inhibiting gas entering the environmental simulation test container and / or some of the devices.

12. The high-temperature molten salt corrosion test method as described in claim 10, characterized in that, The high-temperature molten salt corrosion test method also includes: The high-temperature liquid molten salt in the environmental simulation test container is driven to flow.

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