Device and method for synchronously carrying out heterogeneous atmosphere oxidation / corrosion test

Abstract

The invention discloses a device and a method for synchronously carrying out a heterogeneous atmosphere oxidation / corrosion test. According to the test device, a plurality of to-be-tested samples are fixed at the same time by utilizing a plurality of groups of sample fixing assemblies, and the sample fixing assemblies and the to-be-tested samples are all of hollow structures; the corrosion or oxidation condition of the inner wall of the to-be-tested sample under the first to-be-tested gas is observed, second to-be-tested gas is introduced into the reaction tube, namely, the outer wall of the to-be-tested sample is located in the testing atmosphere of the second to-be-tested gas, and the corrosion or oxidation condition of the outer wall of the to-be-tested sample in the second to-be-tested gas can be observed; the multiple sample fixing assemblies are independently arranged, the performance of different test samples in the same or different corrosion or oxidizing atmospheres can be achieved at the same time, in addition, one sample fixing assembly can achieve simultaneous fixing of multiple samples to be tested, and the test efficiency is improved. Therefore, the corrosion resistance of the same test sample at different test moments in the same test atmosphere can be realized. Therefore, the plurality of sample fixing assemblies are arranged in the reaction tube, so that the plurality of samples can be fixed at the same time, and different types of gases are respectively introduced into the to-be-tested sample with the hollow structure and the reaction tube in the test process; therefore, the inner and outer surfaces of a plurality of samples are respectively exposed in different atmospheres and are subjected to oxidation / corrosion reaction for simultaneous testing, the test quantity is greatly reduced, and material resources and labor cost are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal material testing, and relates to a device and method for synchronously performing heterogeneous atmosphere oxidation / corrosion testing. Background Art

[0002] Metal materials are widely used in high-temperature applications and are usually subjected to oxidation or corrosion in different atmospheres. In order to explore the oxidation or corrosion mechanism of metal materials in different atmospheres or to evaluate the oxidation or corrosion performance of metal materials in different atmospheres, it is often necessary to conduct tests in different atmospheres, which results in large test volume, poor repeatability and high cost. Therefore, if oxidation / corrosion tests in two atmospheres can be carried out at one time, a lot of manpower and material costs can be saved.

[0003] Patent CN202222566119.8 provides a device that can simultaneously test the corrosion resistance of different surfaces of a sample in different corrosive atmospheres. The fundamental principle is that the boiler tube is used as part of the reaction system, and the boiler tube passes through the inside of a horizontal quartz tube or a horizontal corundum tube, and is connected to the horizontal quartz tube or a horizontal corundum tube through a flange seal. The two ends of the boiler tube are sealed by flanges, and high-temperature water vapor and high-temperature flue gas are respectively passed into the boiler tube and the quartz tube through pipelines, so that the inner wall and outer wall of the boiler tube are exposed to water vapor and flue gas respectively, and the performance test of steam oxidation of the inner wall of the boiler tube and flue gas corrosion of the outer wall is realized at the same time. However, the device is only applicable to boiler tubes with a large aspect ratio, and can only test one sample and one time node at a time. If multiple samples and tests of different durations are required, multiple tests must be carried out, which will inevitably lead to an increase in the amount of tests and an increase in costs. It can be seen that the current technology cannot meet the aforementioned oxidation / corrosion test requirements at the same time. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a device and method for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests, thereby solving the problem that the experimental device in the prior art cannot simultaneously perform tests on multiple samples of different durations.

[0005] The present invention is achieved through the following technical solutions:

[0006] A device for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests, comprising a reaction tube; a heating device is provided outside the reaction tube;

[0007] The reaction tube is provided with a plurality of groups of sample fixing components inside, and the sample fixing components and the samples to be tested are both hollow structures. When the test device is used, a plurality of samples to be tested are connected and fixedly arranged with the sample fixing components;

[0008] The air inlet end of the sample fixing component is connected to a first gas source to be tested, and the air inlet end of the reaction tube is connected to a second gas source to be tested.

[0009] Preferably, a group of the sample fixing components includes connecting rods and a plurality of pipe connectors arranged at the air inlet and outlet ends of the reaction tube, and the samples to be tested are sequentially connected and arranged along the axial direction of the reaction tube through the connecting rods and the plurality of pipe connectors.

[0010] Preferably, a waste gas recovery component is connected to the connecting rod at the gas outlet end of the reaction tube.

[0011] Preferably, flanges are provided at both the air inlet end and the air outlet end of the reaction tube, and the connecting rod is fixedly arranged via the flanges.

[0012] Preferably, a placement hole is provided on the flange, and the connecting rod is arranged through the placement hole.

[0013] Preferably, an air inlet hole is provided on the flange at the air inlet end of the reaction tube, and the reaction tube is connected to the second gas source to be measured through the air inlet hole.

[0014] Preferably, an air outlet is provided on the flange at the air outlet end of the reaction tube, and the air outlet is connected to the exhaust gas treatment component.

[0015] Preferably, several groups of the sample fixing components are evenly distributed along the circumference of the reaction tube.

[0016] Preferably, the sample to be tested is threadedly connected to the sample fixing component.

[0017] The above-mentioned method for using the device for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests comprises the following steps:

[0018] S1: Fixing a plurality of samples to be tested inside a reaction tube by using a plurality of sets of sample fixing components;

[0019] S2: heating the reaction tube by a heating device;

[0020] S3: When the set temperature is reached, the first gas to be tested is introduced into the interior of the sample to be tested, and the second gas to be tested is introduced into the interior of the reaction tube to conduct the test.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention discloses a device for synchronously conducting oxidation / corrosion tests in heterogeneous atmospheres. A plurality of groups of sample fixing components are used to simultaneously fix a plurality of samples to be tested. Both the sample fixing components and the samples to be tested are hollow structures. When in use, a first gas to be tested can be introduced into the interior of the sample to be tested through the sample fixing components to observe the corrosion or oxidation of the inner wall of the sample to be tested under the first gas to be tested. A second gas to be tested is introduced into a reaction tube, that is, the outer wall of the sample to be tested is in the test atmosphere of the second gas to be tested, and the corrosion or oxidation of the outer wall of the sample to be tested in the second gas to be tested can be observed. In addition, a plurality of groups of sample fixing components are independently arranged, and performance tests of different test samples in the same or different corrosion or oxidation atmospheres can be simultaneously realized. In addition, a group of sample fixing components can realize the simultaneous fixation of a plurality of samples to be tested, and the corrosion resistance of the same test sample at different test times under the same test atmosphere can be realized. Therefore, the present invention achieves simultaneous fixation of multiple samples by arranging multiple sample fixing components inside the reaction tube. During the test, different types of gases are respectively introduced into the interior of the hollow structure of the sample to be tested and the reaction tube, thereby achieving simultaneous testing of the inner and outer surfaces of the multiple samples being exposed to different atmospheres and undergoing oxidation / corrosion reactions, thereby greatly reducing the amount of testing and saving material and labor costs.

[0023] Furthermore, a group of the sample fixing components includes connecting rods and a plurality of pipe connectors arranged at the air inlet and outlet ends of the reaction tube, and the samples to be tested are connected and arranged in sequence along the axial direction of the reaction tube through the connecting rods and the plurality of pipe connectors. This structure effectively realizes the simultaneous fixation of multiple samples to be tested on a group of sample fixing components, and realizes the corrosion resistance performance test of the same sample at different times.

[0024] Furthermore, a waste gas recovery component is connected to the connecting rod at the gas outlet end of the reaction tube. The provision of the waste gas recovery component effectively avoids the pollution of the environment by the residual atmosphere during the test.

[0025] Furthermore, flanges are provided at both the gas inlet and outlet ends of the reaction tube, and the connecting rod is fixedly arranged via the flanges. The arrangement of the flanges effectively fixes the connecting rod and effectively achieves connection with the second gas source to be measured.

[0026] Furthermore, the setting of the placement hole effectively realizes the fixation of the connecting rod.

[0027] Furthermore, several groups of the sample fixing components are evenly distributed along the circumference of the reaction tube, which can improve the structural stability of the system.

[0028] Furthermore, the sample to be tested is threadedly connected to the sample fixing assembly, making it more convenient to disassemble the sample to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the structure of a device for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests in the present invention;

[0031] Figure 2 It is the front view of the flange;

[0032] Figure 3 It is a front view of the sample to be tested;

[0033] Figure 4 is a side view of a sample to be tested in an example;

[0034] Figure 5 A side view of a sample to be tested in another example.

[0035] Among them: 1. reaction tube, 2. flange, 3. air inlet, 4. placement hole, 5. air outlet, 6. sample to be tested, 7. pipe connector, 8. connecting rod, 9. heating device, 10. mixer, 11. valve, 12. flow meter, 13. water pump, 14. heater, 15. exhaust gas recovery component, 16. exhaust gas treatment component. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0043] like Figure 1 As shown, a device for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests includes a reaction tube 1; a heating device 9 is provided on the outside of the reaction tube 1; a plurality of groups of sample fixing components are provided inside the reaction tube 1, and the sample fixing components and the samples to be tested 6 are both hollow structures, and a group of the sample fixing components includes a connecting rod 8 and a plurality of pipe connectors 7 arranged at the air inlet and air outlet ends of the reaction tube 1, and the samples to be tested 6 are sequentially connected and arranged along the axial direction of the reaction tube 1 through the connecting rod 8 and the plurality of pipe connectors 7. When the test device is used, a plurality of samples to be tested 6 are connected and fixed to the sample fixing components;

[0044] The air inlet end of the sample fixing assembly is connected to the first gas source to be tested, the air inlet end of the reaction tube 1 is connected to the second gas source to be tested, and the connecting rod 8 at the air outlet end of the reaction tube 1 is connected to the waste gas recovery assembly 15.

[0045] In a preferred embodiment, the gas inlet and outlet ends of the reaction tube 1 are both provided with flanges 2, and the connecting rod 8 is fixedly arranged through the flanges 2. The arrangement of the flanges 2 can also effectively achieve the sealing of the reaction tube 1.

[0046] like Figure 2 As shown, a placement hole 4 is provided on the flange 2 , and the connecting rod 8 is arranged through the placement hole 4 .

[0047] In a preferred embodiment, a plurality of placement holes 4 are provided on the flange 2 , and the diameter of the placement holes 4 is the same as the outer diameter of the connecting rod 8 .

[0048] An air inlet 3 is provided on the flange 2 at the air inlet end of the reaction tube 1, and the reaction tube 1 is connected to the second gas source to be measured through the air inlet 3. An air outlet 5 is provided on the flange 2 at the air outlet end of the reaction tube 1, and the air outlet 5 is connected to the exhaust gas treatment component 16. Here, the air inlet 3 and the air outlet 5 are arranged correspondingly. The exhaust gas treatment component 16 can be an exhaust gas treatment bottle, and the exhaust gas treatment component 16 stores a solution for purifying pollutant gases.

[0049] In the present invention, the first gas source to be tested may be steam, or may be a steam generating unit, which is connected to the hollow connecting rod 8 so as to allow steam to flow into the sample to be tested 6 and discharge the reacted steam for recovery.

[0050] The steam generating unit comprises: a water source, a water pump 13 and a heater 14 connected in sequence; the steam generating unit is used to generate the first gas to be tested and is connected to the connecting rod 8 through a pipeline; a valve and a flow meter are provided on the pipeline connecting the heater and the connecting rod.

[0051] In addition, the sample 6 to be tested and the sample fixing assembly may be connected by threads or by welding. Figure 3 As shown, the sample to be tested 6 and the pipe connector 7 can be threadedly connected. Figure 4 As shown, the pipe connector 7 is located at the central axis of the sample 6 to be tested. The sample 6 to be tested can be a cylinder, that is, the end surface of the sample 6 to be tested is circular. Figure 5 As shown, the sample 6 to be tested may also be a cuboid, that is, the end surface of the sample 6 to be tested is a rectangle.

[0052] The second gas to be tested in the present invention may be a mixed gas, which is produced by a gas prefabrication unit, and the gas prefabrication unit is connected to the gas inlet 3;

[0053] The gas preparation unit includes:

[0054] The gas mixer 10 is used to prepare a gas that meets the requirements, that is, the second gas to be tested, and the outlet of the gas mixer 10 is connected to the gas inlet 3 of the reaction tube 1;

[0055] A plurality of gas storage cylinders are connected in parallel, each of which contains different gases and is connected to the inlet of the gas mixer.

[0056] In a preferred embodiment, the gas cylinder and the pipeline at the outlet of the mixer 10 are both provided with a valve 11 and a flow meter 12 .

[0057] In addition, the present invention also discloses a method for using the above-mentioned device for synchronously conducting heterogeneous atmosphere oxidation / corrosion tests, comprising the following steps:

[0058] S1: fixing a plurality of samples 6 to be tested inside a reaction tube 1 by using a plurality of groups of sample fixing components;

[0059] S2: heating the reaction tube 1 by the heating device 9;

[0060] S3: When the set temperature is reached, the first gas to be tested is introduced into the interior of the sample to be tested 6, and the second gas to be tested is introduced into the interior of the reaction tube 1 to carry out the test.

[0061] Specifically, it can be:

[0062] S1: Determine the number of samples 6 to be tested according to the length of the reaction tube 1 and the length of the sample 6 to be tested;

[0063] S2, a plurality of samples 6 to be tested are fixedly connected by connecting rods 8, and are placed in the reaction tube 1 along the axial direction of the reaction tube 1;

[0064] S3, pass the connecting rods 8 at both ends through the placement holes 4 and seal them with the flange 2;

[0065] S4, introducing high-purity protective gas into the connecting rod 8 and the reaction tube 1 respectively to remove residual air in the connecting rod 8, the sample 6 to be tested and the reaction tube 1;

[0066] S5, heating according to the set program, when reaching the set temperature, switching the gas, respectively introducing water vapor and mixed gas into the connecting rod 8 and the reaction tube 1, and keeping the temperature;

[0067] S6. Keep warm for the set time and end the test. When the temperature drops below 100°C, turn off the mixed gas and water vapor, cool to room temperature with the furnace, and take out the sample.

[0068] The present invention proposes a device for synchronously conducting oxidation / corrosion tests in heterogeneous atmospheres, which can be used to realize synchronous oxidation / corrosion performance testing of different surfaces of batch samples in heterogeneous atmospheres. A plurality of samples 6 to be tested are arranged horizontally axially on a reaction tube 1, and the samples 6 to be tested are connected and fixed by hollow connecting rods 8, and the connecting rods 8 at the ends pass through placement holes 4 on flanges 2 at both ends of the reaction tube 1 to be connected to a steam generating unit. During the test, different types of gases are respectively introduced into the connecting rods 8 and the reaction tube 1, so that the inner and outer surfaces of the plurality of samples to be tested 6 are respectively exposed to different atmospheres, and finally, different surfaces of the batch samples are subjected to synchronous oxidation / corrosion reactions in different atmospheres, thereby greatly reducing the amount of testing and saving material and labor costs.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for conducting oxidation / corrosion tests in heterogeneous atmospheres simultaneously, characterized in that: It comprises a reaction tube (1); a heating device (9) is provided outside the reaction tube (1); The reaction tube (1) is provided with a plurality of groups of sample fixing components inside, and the sample fixing components and the samples to be tested (6) are both hollow structures. When the test device is used, a plurality of samples to be tested (6) are connected and fixedly arranged with the sample fixing components; The air inlet end of the sample fixing component is connected to a first gas source to be tested, and the air inlet end of the reaction tube (1) is connected to a second gas source to be tested.

2. The device for conducting simultaneous oxidation / corrosion tests in heterogeneous atmospheres according to claim 1, characterized in that: A set of the sample fixing components comprises connecting rods (8) and a plurality of pipe connectors (7) arranged at the air inlet and air outlet ends of the reaction tube (1), and the sample to be tested (6) is connected and arranged in sequence along the axial direction of the reaction tube (1) via the connecting rods (8) and the plurality of pipe connectors (7).

3. The device for conducting simultaneous oxidation / corrosion tests in heterogeneous atmospheres according to claim 2, characterized in that: A waste gas recovery component (15) is connected to the connecting rod (8) at the gas outlet end of the reaction tube (1).

4. The device for conducting simultaneous heterogeneous atmosphere oxidation / corrosion tests according to claim 2, characterized in that: The gas inlet end and the gas outlet end of the reaction tube (1) are both provided with flanges (2), and the connecting rod (8) is fixedly arranged via the flanges (2).

5. The device for conducting simultaneous oxidation / corrosion tests in heterogeneous atmospheres according to claim 4, characterized in that: The flange (2) is provided with a placement hole (4), and the connecting rod (8) is arranged to pass through the placement hole (4).

6. The device for conducting simultaneous heterogeneous atmosphere oxidation / corrosion tests according to claim 4, characterized in that: An air inlet hole (3) is provided on the flange (2) at the air inlet end of the reaction tube (1), and the reaction tube (1) is connected to a second gas source to be measured via the air inlet hole (3).

7. The device for conducting simultaneous oxidation / corrosion tests in heterogeneous atmospheres according to claim 4, characterized in that: An air outlet hole (5) is provided on the flange (2) at the air outlet end of the reaction tube (1), and the air outlet hole (5) is connected to the exhaust gas treatment component (16).

8. The device for conducting simultaneous heterogeneous atmosphere oxidation / corrosion tests according to claim 1, characterized in that: Several groups of the sample fixing components are evenly distributed along the circumference of the reaction tube (1).

9. The device for conducting simultaneous oxidation / corrosion tests in heterogeneous atmospheres according to claim 1, characterized in that: The sample to be tested (6) is threadedly connected to the sample fixing component.

10. A method for using a device for simultaneously conducting heterogeneous atmosphere oxidation / corrosion tests according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: fixing a plurality of samples to be tested (6) inside a reaction tube (1) by using a plurality of sets of sample fixing components; S2: heating the reaction tube (1) by means of a heating device (9); S3: When the set temperature is reached, the first gas to be tested is introduced into the interior of the sample to be tested (6), and the second gas to be tested is introduced into the interior of the reaction tube (1) to carry out the test.

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