Device for testing material corrosion rate in liquid metal

Abstract

The utility model provides a device for testing the corrosion rate of a material in liquid metal, and the device comprises a testing container which is internally provided with a testing cavity; the test probe is arranged on the test container, and the test end of the test probe is located in the test cavity; the temperature compensation element is arranged in the test probe, and the temperature compensation element is used for measuring the temperature borne by the test probe in real time; the liquid supplementing assembly is used for providing a test solution for the interior of the test cavity; the device has the advantages that the temperature of the liquid metal coolant is changed through the heater, the content of gas dissolved in the liquid metal coolant is changed through the expansion box, the flow speed of the liquid metal coolant is changed through the pump body, and therefore the corrosion rate of the test probe under different operation conditions is obtained, operation is easy and efficient, and the test accuracy is high. The device can realize on-line real-time detection of the material corrosion rate, and is convenient to use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of material corrosion rate, and particularly relates to a device for testing material corrosion rate in liquid metal. BACKGROUND

[0002] The reactor with liquid metal (such as lead alloy and lead bismuth alloy) as coolant has high safety and reliability, and the corrosion problem of high-temperature and high-flow-rate liquid metal coolant to structural materials is one of key engineering problems to be solved in design and development of the reactor, so that in order to make the structural materials meet the service requirements under the operating conditions of the reactor, the corrosion rate of the structural materials in the liquid metal coolant needs to be obtained through experimental research, the service performance of the structural materials is evaluated, and the structural materials are selected and optimized.

[0003] At present, researchers analyze the structural materials through regular sampling, and obtain the corrosion rate of the structural materials in the liquid metal coolant by measuring the weight change or the thickness change of the oxide film, however, the method is slow in efficiency, cannot timely master the corrosion rate data of different materials and the corrosion rate data of the same material under different operating conditions, and cannot realize online monitoring. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving at least one of the technical problems existing in the prior art or related art.

[0005] In order to solve the above problems, the application provides a device for testing material corrosion rate in liquid metal, which comprises:

[0006] A test container is internally provided with a test cavity;

[0007] A test probe is arranged on the test container, and a test end of the test probe is located in the test cavity;

[0008] A temperature compensation element is arranged in the test probe, and the temperature compensation element is used for measuring the temperature received by the test probe in real time;

[0009] A liquid supplement assembly provides a test solution in the test cavity.

[0010] Optionally, the test probe is detachably connected with the top of the test container.

[0011] Optionally, the diameter of the test end of the test probe is smaller than the inner diameter of the test cavity.

[0012] Optionally, the liquid supplement assembly comprises:

[0013] A pump body;

[0014] a heater, through which the pump body outlet is connected with the test container inlet.

[0015] Optionally, the liquid supplementing assembly further comprises:

[0016] an expansion tank, through which the test container outlet is connected with the pump body inlet.

[0017] Optionally, the liquid supplementing assembly further comprises:

[0018] a cooler, which is arranged between the expansion tank and the pump body.

[0019] Optionally, connecting pipelines are arranged between the pump body, the heater, the test container, the expansion tank and the cooler.

[0020] Optionally, the test container inlet is located at the top of the side wall, and the test container outlet is located at the bottom.

[0021] Optionally, the expansion tank inlet is located lower than the expansion tank outlet.

[0022] Optionally, an insulation layer is arranged outside the connecting pipeline.

[0023] Advantages

[0024] The device for testing the corrosion rate of materials in liquid metal provided in the embodiment of the utility model has the following advantages: the temperature of the liquid metal coolant is changed by the heater, the content of the dissolved gas in the liquid metal coolant is changed by the expansion tank, and the flow rate of the liquid metal coolant is changed by the pump body, so that the corrosion rate of the test probe under different operating conditions is obtained, the operation is simple and efficient, the online real-time detection of the corrosion rate of materials can be realized, and the device is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The utility model is a structural diagram.

[0026] The reference signs are represented as:

[0027] 1, test container; 2, test probe; 3, liquid supplementing assembly; 31, pump body; 32, heater; 33, expansion tank; 34, cooler. DETAILED DESCRIPTION

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The preferred embodiments of the present application are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0032] In conjunction with Figure 1 As shown in the drawings, according to the embodiments of the present application, a device for testing the corrosion rate of materials in liquid metal is provided, which comprises:

[0033] A test container 1 is provided with a test cavity inside;

[0034] A test probe 2 is arranged on the test container 1, and the test end of the test probe 2 is located in the test cavity;

[0035] A temperature compensation element is arranged inside the test probe 2, and the temperature compensation element is used to measure the temperature received by the test probe 2 in real time;

[0036] A liquid supplement assembly 3 is provided for testing the test solution inside the test cavity.

[0037] Specifically, a test cavity is formed in the test container 1 to provide a stable and independent space for the entire test process, the liquid supplement assembly 3 provides a test solution inside the test cavity to ensure stable supply of liquid metal during the test process, the test probe 2 is installed on the test container 1, and the bottom test end of the test probe 2 is accurately located in the test cavity, so that the test probe 2 can directly contact with the liquid metal, the measuring device is connected to the outside of the test probe 2, and the resistance value of the test probe 2 can be accurately measured in real time; the temperature compensation element is arranged in the test probe 2, and the temperature compensation element is used for detecting the temperature of the test probe 2 in real time, so that the resistivity of the test probe 2 at the corresponding temperature can be obtained, and then the corresponding cross-sectional area can be obtained (R is resistance, p is the resistivity of the material, L is the length of the resistance probe, and S is the cross-sectional area). The on-line monitoring of the corrosion rate of the metal probe can be realized, the test flow rate is changed through the liquid supplement assembly 3, and thus the corrosion rate of the metal probe under different flow rate conditions can be obtained.

[0038] The test probe 2 is made of a test material, and the test probe 2 can be made according to different measurement requirements. The test probe 2 has a cylindrical structure.

[0039] The test cavity in the test container 1 has a circular structure.

[0040] The temperature compensation element can be a temperature detection sensor or a metal wire with the same material as the test probe 2. When the temperature compensation element is a metal wire with the same material as the test probe 2, the resistivity of the metal wire can be calculated by detecting the resistance of the metal wire under the condition that the length and cross-sectional area of the metal wire are known. At this time, the resistivity of the temperature compensation element is also the resistivity of the test probe 2.

[0041] The liquid supplement assembly 3 is used to feed the liquid metal coolant into the test cavity.

[0042] The test probe 2 is detachably connected to the top of the test container 1.

[0043] Specifically, the test probe 2 is detachably connected to the top of the test container 1, so that the installation and disassembly of the test probe 2 become extremely simple. The detachable connection can be threaded connection, clamping or the like, and is preferably threaded connection, which can ensure that the test probe 2 is firmly fixed on the test container 1, so as to prevent loosening or displacement during the test process, thereby ensuring the accuracy of the test results. The detachable connection provides flexibility for testing the corrosion rate of different materials. Since the test probe 2 can be easily replaced, the test probe 2 made of different materials can be selected according to different test requirements. The device can adapt to various test scenarios, greatly improving its versatility.

[0044] The test end diameter of the test probe 2 is less than the test cavity inner diameter.

[0045] Specifically, by making the test end diameter of the test probe 2 less than the test cavity inner diameter, it is ensured that the test probe 2 can be smoothly installed and arranged in the test cavity of the test container 1. When the test probe 2 is inserted into the test cavity, since its test end diameter is less than the test cavity inner diameter, it will not interfere or hinder with the inner wall of the test cavity, thereby ensuring the smoothness of the installation process. At the same time, this size difference also provides a certain space for the flow of liquid metal in the test cavity, so that the liquid metal can fully flow around the test probe 2, more truly simulating the contact between the material and the liquid metal under actual working conditions.

[0046] The liquid supplement assembly 3 comprises:

[0047] a pump body 31;

[0048] a heater 32, the liquid outlet of the pump body 31 being connected to the liquid inlet of the test container 1 through the heater 32.

[0049] Specifically, the liquid supplement assembly 3 comprises the pump body 31 and the heater 32, and the pump body 31 provides a power source for the entire test system. The pump body 31 can feed the liquid metal into the test cavity through the heater 32 at a certain pressure and flow rate for test experiments. The heater 32 is used to heat the liquid metal according to experimental requirements, and its heating methods can be, for example, resistance heating, induction heating, etc. The temperature of the liquid metal after heating reaches the target temperature required for testing, and is fed into the test cavity. The pump body 31 can accurately control the flow rate of the liquid metal, so that the flow rate of the liquid metal can be adjusted according to different requirements during the test, thereby studying the influence of the flow rate on the corrosion rate of the material. Secondly, the heater 32 can quickly heat the liquid metal to different temperatures, thereby obtaining the corrosion rate of the test probe 2 at different temperatures, and the operation is more convenient.

[0050] The liquid supplement assembly 3 further comprises:

[0051] an expansion tank 33, the liquid outlet of the test container 1 being connected to the liquid inlet of the pump body 31 through the expansion tank 33.

[0052] Specifically, by installing the expansion tank 33 between the pump body 31 and the test container 1, by adjusting the gas partial pressure in the upper space of the expansion tank 33, the material corrosion rate of the test probe 2 can be obtained under different dissolved gas concentration conditions of the liquid metal coolant.

[0053] The liquid supplement assembly 3 further comprises:

[0054] a cooler 34, which is arranged between the expansion tank 33 and the pump body 31.

[0055] Specifically, the cooler 34 is installed between the expansion tank 33 and the pump body 31, and the liquid coolant after the expansion tank 33 flows back to the pump body 31 through the cooler 34, the cooler 34 is used for cooling the liquid coolant, avoiding damage to the pump body 31 caused by too high temperature of the liquid coolant, and making the liquid metal with appropriate temperature enter the test system again, which can also ensure that the test process is carried out under stable temperature conditions, thereby improving the accuracy and reliability of the test results.

[0056] The connecting pipelines are arranged between the pump body 31, the heater 32, the test container 1, the expansion tank 33 and the cooler 34.

[0057] Specifically, the connecting pipelines are arranged between the heater 32, the test container 1, the expansion tank 33 and the cooler 34, and the arrangement of the connecting pipelines ensures that the liquid metal can flow smoothly between the components.

[0058] The liquid inlet of the test container 1 is located at the top of the side wall, and the liquid outlet of the test container 1 is located at the bottom.

[0059] Specifically, the liquid inlet of the test container 1 is located at the top of the side wall, when the liquid metal flows in from the liquid inlet, since the liquid inlet is located at the top of the side wall, the liquid metal can be more evenly spread in the test container 1, avoiding direct impact on the test probe 2 and other key components, thereby ensuring the stability of the test environment. The liquid outlet of the test container 1 is located at the bottom, which is convenient for the discharge of the liquid metal coolant.

[0060] The liquid inlet position of the expansion tank 33 is lower than the liquid outlet position of the expansion tank 33.

[0061] Specifically, when the liquid metal enters the expansion tank 33 from the lower liquid inlet, due to the action of gravity, the liquid metal will naturally rise upward. In this process, the liquid metal can more fully contact and interact with the air or other medium in the expansion tank 33, thereby helping to regulate the pressure and flow of the liquid metal. At the same time, the lower position of the liquid inlet can also avoid strong impact and turbulence during the liquid inlet process, ensuring the stability of the liquid metal flowing into the expansion tank 33. The higher position of the liquid outlet makes the liquid metal after treatment and regulation flow out of the expansion tank 33 under the action of a certain pressure. This low-to-high flow path can effectively utilize gravity and pressure difference to ensure that the flow of liquid metal in the entire test system is more smooth and controllable.

[0062] The connecting pipelines are arranged between the pump body 31, the heater 32, the test container 1, the expansion tank 33 and the cooler 34.

[0063] Specifically, the heat preservation layer can effectively reduce the heat loss of the liquid metal coolant flowing in the connecting pipeline. During the test, the liquid metal coolant needs to be kept within a certain temperature range to ensure the accuracy and reliability of the test results. Without the heat preservation layer, the liquid metal coolant in the connecting pipeline will exchange heat with the surrounding environment, causing the temperature to drop or fluctuate. The presence of the heat preservation layer can greatly reduce the degree of heat exchange, allowing the liquid metal to maintain a relatively stable temperature in the connecting pipeline.

[0064] The heat preservation layer can be covered with a heat preservation material on the outside of the connecting pipeline, and a heating wire is installed inside the heat preservation material.

[0065] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. An apparatus for testing the rate of material corrosion in liquid metal, characterized by, The utility model relates to a test container and liquid supplementing assembly thereof, comprising: a test container (1) with a test cavity inside; a test probe (2) arranged on the test container (1) and with a test end located in the test cavity; a temperature compensation element arranged inside the test probe (2) for measuring the temperature received by the test probe (2) in real time; a liquid supplementing assembly (3) for providing test solution inside the test cavity.

2. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 1, wherein, The test probe (2) is detachably connected to the top of the test container (1).

3. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 1, wherein, The diameter of the test end of the test probe (2) is smaller than the inner diameter of the test cavity.

4. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 1, wherein, The liquid supplementing assembly (3) comprises: a pump body (31); a heater (32) connected to the liquid inlet of the test container (1) through the liquid outlet of the pump body (31).

5. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 4, wherein, The liquid supplementing assembly (3) further comprises: an expansion tank (33) connected to the liquid inlet of the pump body (31) through the liquid outlet of the test container (1).

6. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 5, wherein, The liquid supplementing assembly (3) further comprises: a cooler (34) arranged between the expansion tank (33) and the pump body (31).

7. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 6, wherein, Connecting pipelines are arranged between the pump body (31), the heater (32), the test container (1), the expansion tank (33) and the cooler (34).

8. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 7, wherein, The liquid inlet of the test container (1) is located at the top of the side wall, and the liquid outlet is located at the bottom.

9. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 8, wherein, The liquid inlet of the expansion tank (33) is located lower than the liquid outlet.

10. The apparatus for testing the corrosion rate of a material in a liquid metal of claim 7, wherein, An insulation layer is arranged outside the connecting pipelines.

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