Temperature-controllable immersion corrosion experimental device and experimental method

Abstract

The invention provides a temperature-controllable immersion corrosion experimental device and experimental method. The device comprises an outer-layer water bath temperature control box, an inner-layer immersion box or immersion support frame and a temperature control water bath. The outer-layer water bath temperature control box provides a stable temperature control environment, and the inner-layer soaking box or the soaking support frame is used for placing a sample to be corroded and can be selectively arranged in the outer-layer water bath temperature control box as required. An independent soaking container for soaking the test piece can be placed on the soaking support frame so as to realize independent soaking of the test piece. And the temperature control water bath is connected with a water inlet and a water outlet of the outer-layer water bath temperature control box through a circulating water bath function, so that the temperature of the soaking environment is accurately controlled. According to the invention, by realizing accurate temperature control and a flexible sample placement mode, the stability of samples with different sizes in the soaking process is ensured, meanwhile, the experiment cost is reduced, the experiment efficiency is improved, and an efficient and reliable experiment means is provided for research on corrosion resistance behaviors of materials in complex environments such as ocean.

Description

Technical Field

[0001] The invention relates to the technical field of material corrosion testing, and in particular to a temperature-controllable immersion corrosion experimental device and an experimental method. Background Art

[0002] With the acceleration of the world's industrialization process, various metal materials and alloys are widely used in infrastructure construction, petrochemicals, energy development, electronic information and other key fields. Corrosion is the main reason for the destruction of metal materials, leading to the destruction and scrapping of various infrastructure and engineering equipment. In the process of developing marine oil and gas resources, corrosion will cause damage to ships, equipment, platforms, etc., affecting their service life and reliability, thus becoming a potential problem. Especially in the process of oil and gas field completion, due to factors such as high temperature and high pressure, seawater electrolytes, and complex environmental loads, some key components (ultra-high temperature and high pressure packers, downhole safety valves, etc.) are very prone to pitting perforation and stress corrosion cracking and failure, thus causing serious safety accidents. Therefore, it is necessary to design a temperature-controlled immersion corrosion experimental device to study the corrosion resistance of parts in the ocean.

[0003] It should be noted that the information disclosed in the above background technology section is only used for understanding the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0004] The main purpose of the present invention is to overcome the defects existing in the above-mentioned background technology and provide a temperature-controllable immersion corrosion experimental device and experimental method.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A temperature-controllable immersion corrosion test device, comprising: The outer water bath temperature control box is used to provide a temperature control environment; An inner immersion box or immersion support frame is used to place the sample to be corroded. The inner immersion box or immersion support frame can be selectively arranged in the outer water bath temperature control box, and the immersion container for immersing the test piece is placed on the immersion support frame; The temperature-controlled water bath is connected to the water inlet and the water outlet of the outer water bath temperature-controlled box, and the temperature in the outer water bath temperature-controlled box is precisely controlled through the circulating water bath function.

[0006] Furthermore, the outer layer of the outer water bath temperature control box is wrapped with a thermal insulation material, and the thermal insulation material includes a silica nano aerogel felt pipe insulation composite thermal insulation material, which is used to reduce heat loss.

[0007] Furthermore, a metal support frame is placed between the inner immersion box and the outer water bath temperature control box, and the metal support frame is used to support the inner immersion box to make the temperature rise faster.

[0008] Furthermore, the inner immersion box and the outer water bath temperature control box are designed to be rectangular and made of acrylic material.

[0009] Furthermore, the temperature-controlled water bath includes a heating element, a temperature sensor, a circulation pump and a temperature-controlled medium tank. The heating element is used to heat the temperature-controlled medium to a preset temperature. The temperature sensor is used to monitor the temperature of the temperature-controlled medium in real time. The temperature-controlled medium tank is used to accommodate the temperature-controlled medium. The temperature-controlled water bath circulates the temperature-controlled medium between the outer water bath temperature control box and the temperature-controlled water bath through the circulation pump to achieve precise temperature control.

[0010] Furthermore, a semicircular groove is provided at the upper end of the inner immersion tank, and the semicircular groove is used to install a support rod, and the support rod supports a fixing rope passing through the large tubular part to suspend the large tubular part and immerse it in the inner immersion tank.

[0011] Furthermore, the immersion support frame includes a main base and multiple small independent support bases. The height of the immersion support frame matches the height of the water inlet and the water outlet and the height of the immersion container, and can be adjusted according to the size of the immersion test piece to achieve independent immersion of the test piece.

[0012] A method for performing an immersion corrosion experiment using the temperature-controllable immersion corrosion experiment device comprises the following steps: Place the inner soaking box or soaking support frame in the outer water bath temperature control box, and place the soaking container on the soaking support frame; Placing a sample to be corroded in the inner layer immersion box or the immersion container; Adding temperature control medium into the outer water bath temperature control box and the temperature-controlled water bath; Starting the temperature-controlled water bath, and circulating the temperature-controlled medium between the outer water bath temperature-controlled box and the temperature-controlled water bath by means of a circulation pump, so as to achieve precise control of the temperature in the inner immersion box; The immersion corrosion experiment is carried out at a set temperature, and the temperature in the inner immersion box is monitored in real time to ensure that the temperature is maintained within a preset range.

[0013] A method for performing an immersion corrosion experiment using the temperature-controllable immersion corrosion experiment device comprises the following steps: Placing the support rod in the semicircular groove at the upper end of the inner soaking box; Connecting a fixing rope to the support rod; The large tubular part is suspended in the center of the inner soaking box by the fixing rope so that the outer wall of the large tubular part does not contact the inner soaking box; Adding a corrosive liquid into the inner layer immersion tank until the corrosive liquid submerges the large tubular part; The temperature-controlled water bath is started, and the temperature-controlled medium is circulated between the outer water bath temperature-controlled box and the temperature-controlled water bath through a circulating pump to achieve precise control of the temperature in the inner immersion box and maintain the large tubular parts at the set temperature for immersion corrosion experiments.

[0014] A method for performing an immersion corrosion experiment using the temperature-controllable immersion corrosion experiment device comprises the following steps: Placing an immersion support frame in an outer water bath temperature control box, wherein the immersion support frame includes a main base and a plurality of small independent support bases; Placing a plurality of independent immersion containers on the small independent support bases respectively, the immersion containers being used to accommodate the test pieces to be corroded; Adjusting the height of the small independent support base according to the size of the test piece to ensure that the test piece can be stably immersed in the immersion container; Add the corrosive liquid into each immersion container so that the test piece is completely immersed in the corrosive liquid; Adding temperature control medium to the outer water bath temperature control box and the temperature-controlled water bath; Start the temperature-controlled water bath, and circulate the temperature-controlled medium between the outer water bath temperature-controlled box and the temperature-controlled water bath through a circulation pump, so as to achieve precise control of the temperature in the immersion container; The immersion corrosion test is carried out at the set temperature, and the temperature in the outer water bath temperature control box is monitored in real time to ensure that the temperature is maintained within the preset range. The corrosion test is carried out on the test piece in each immersion container under the same temperature conditions.

[0015] In some embodiments, a temperature-controllable immersion corrosion test device is provided, wherein the temperature-controllable immersion corrosion test device comprises an immersion box and a temperature-controlled water bath.

[0016] The immersion box comprises an inner immersion box and an outer water bath temperature control box, and a metal support frame is placed between the inner immersion box and the outer water bath temperature control box to support and ensure faster temperature transfer.

[0017] The inner immersion box can be changed into an immersion support frame according to different usage scenarios, or the support rod and rope can be connected through the semicircular groove at the upper end of the inner immersion box to fix the parts to be immersed. The semicircular groove connected rope immersion is suitable for immersion corrosion experiments of large tubular parts.

[0018] The outer layer of the outer water bath temperature control box is wrapped with insulation material, and the insulation material includes but is not limited to silica nano aerogel felt pipe insulation composite insulation material, which can effectively reduce heat loss. It is also equipped with an anti-volatile cover and a pair of water inlet and outlet. A semicircular groove is opened on the top of the anti-volatile cover to connect an external temperature tester to realize temperature monitoring.

[0019] In some embodiments, the inner immersion box and the outer water bath temperature control box are designed to be rectangular in shape and are made of acrylic material, which not only gives the device good transparency and facilitates the experimenter to directly observe the state of the internal sample, but also the acrylic material has excellent corrosion resistance and high mechanical strength, ensuring the stability and durability of the device in long-term use.

[0020] The temperature-controlled water bath is in the shape of a rectangular parallelepiped, and is usually composed of a heating element, a temperature sensor, a circulating pump, and a temperature-controlled medium tank. There are other potential alternative devices, such as air bath temperature control. The temperature-controlled water bath can be connected to the water inlet and the water outlet to realize the function of a circulating water bath. The required temperature range is set through the control panel, and the heating element quickly and evenly heats the temperature-controlled medium to the preset temperature to provide a constant temperature environment for the immersion box.

[0021] In some embodiments, a low-cost and simple temperature control method for the temperature-controllable immersion corrosion test device is provided, and the temperature control method is implemented by a temperature-controlled water bath, and the temperature-controlled water bath monitors the temperature in real time and controls the temperature of the test device by heating the medium in the water bath. Compared with the commonly used air conditioning temperature control (by adjusting the indoor air flow and temperature to achieve the purpose of temperature control), the temperature control method has the advantages of high economic benefits, simple use, and high control accuracy.

[0022] In some embodiments, a serial independent immersion method according to the controllable temperature immersion corrosion test device is provided, and the immersion method is realized by means of a designed immersion support frame, and the immersion support frame includes a main base and multiple small independent support bases. The height of the immersion support frame matches the height of the water inlet and outlet and the height of the immersion container, and can be adjusted according to the size of the immersion test piece.

[0023] In some embodiments, a immersion method suitable for large tubular parts is provided according to the controllable temperature immersion corrosion testing device, wherein the immersion method is achieved by means of a semicircular groove at the upper end of the inner immersion box, and the semicircular groove is equipped with a number of support rods and ropes of the same corresponding diameter.

[0024] In some embodiments, a temperature-controlled immersion corrosion test device and a multi-stage series independent immersion method include a device body, the device body includes an immersion box and a temperature-controlled water bath, the immersion box includes an outer water bath temperature-controlled box and an inner immersion box, the inner immersion box can be changed to an immersion support frame or connected to a rope via an upper semicircular groove to fix the parts to be immersed according to different usage scenarios, the outer layer of the outer water bath temperature-controlled box is wrapped with a silica nano-aerogel felt pipe insulation composite thermal insulation material, a metal bracket is placed between the inner immersion box and the outer water bath temperature-controlled box for support, an anti-volatile cover is provided, and a pair of water inlets and outlets are provided, the water inlet and outlet are connected to the temperature-controlled water bath to realize circulating water bath temperature control. This technical solution ensures the stability of objects of different sizes during immersion, and at the same time can achieve effective control of the immersion temperature, effectively reducing costs.

[0025] The present invention has the following beneficial effects: The temperature-controlled immersion corrosion experimental device and experimental method of the present invention provide a simple, fast, and economical and effective solution to the problem that the simulated immersion corrosion experiment in the prior art cannot effectively control the temperature or the temperature control cost is too high. The device realizes precise control of the immersion temperature through the circulating water bath function of the outer water bath temperature control box and the temperature-controlled water bath, ensuring the consistency and accuracy of the experimental conditions. The design of the inner immersion box or the immersion support frame is preferably an adjustable immersion support frame, which can accommodate specimens of different sizes, including large tubular parts and small test pieces, to ensure the stability of objects of different sizes during immersion. Overall, the present invention significantly reduces the experimental cost and improves the experimental efficiency while effectively controlling the immersion temperature, providing an efficient and reliable experimental means for studying the corrosion behavior of materials in complex environments such as the ocean.

[0026] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of a temperature-controllable immersion corrosion experimental device according to an embodiment of the present invention.

[0028] Figure 2 Schematic diagram of a soaking box according to an embodiment of the present invention.

[0029] Figure 3 Schematic diagram of a large tubular part test according to an embodiment of the present invention.

[0030] Figure 4 FIG. 4 is a schematic diagram of a small steel specimen test according to an embodiment of the present invention.

[0031] Figure numerals: 1. Outer water bath temperature control box; 2. Water inlet; 3. Inner immersion box; 4. Support rod; 5. Water outlet; 6. Temperature-controlled water bath; 7. Metal support frame; 8. Water pipe; 9. Large tubular parts; 10. Fixing rope; 11. Immersion support frame. DETAILED DESCRIPTION

[0032] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing as well as for coupling or communication.

[0034] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] See also Figures 1 to 4 The embodiment of the present invention provides a controllable temperature immersion corrosion experimental device, including: an outer water bath temperature control box 1, used to provide a temperature control environment; an inner immersion box 3 or an immersion support frame 11, used to place the sample to be corroded, the inner immersion box 3 or the immersion support frame 11 can be selectively arranged in the outer water bath temperature control box 1, and the immersion container (not shown) for immersing the test piece is placed on the immersion support frame 11; a temperature-controlled water bath 6, connected to the water inlet 2 and the water outlet 5 of the outer water bath temperature control box 1 through a water pipe 8, and the temperature in the outer water bath temperature control box 1 is accurately controlled through the circulating water bath function.

[0037] In a preferred embodiment, the outer layer of the outer water bath temperature control box 1 is wrapped with a thermal insulation material, and the thermal insulation material includes a silica nano-aerogel felt pipe insulation composite thermal insulation material for reducing heat loss.

[0038] See also Figure 2 In a preferred embodiment, a metal support frame 7 is placed between the inner immersion box 3 and the outer water bath temperature control box 1, and the metal support frame 7 is used to support the inner immersion box 3 to make the temperature rise faster.

[0039] In a preferred embodiment, the inner immersion box 3 and the outer water bath temperature control box 1 are designed to be rectangular and made of acrylic material. Acrylic material is not only highly transparent and convenient for observing the experimental process, but also has excellent corrosion resistance and mechanical strength, and can withstand various chemical corrosion.

[0040] In a preferred embodiment, the temperature-controlled water bath 6 includes a heating element, a temperature sensor, a circulation pump and a temperature-controlled medium tank. The heating element is used to heat the temperature-controlled medium to a preset temperature, the temperature sensor is used to monitor the temperature of the temperature-controlled medium in real time, the temperature-controlled medium tank is used to accommodate the temperature-controlled medium, and the temperature-controlled water bath 6 circulates the temperature-controlled medium between the outer water bath temperature control box 1 and the temperature-controlled water bath 6 through the circulation pump to achieve precise temperature control.

[0041] See also Figure 3 In a preferred embodiment, a semicircular groove is provided at the upper end of the inner immersion tank 3, and the semicircular groove is used to install a support rod 4. The support rod 4 supports a fixing rope 10 passing through the large tubular part 9 to suspend the large tubular part 9 and immerse it in the inner immersion tank 3.

[0042] See also Figure 4 In a preferred embodiment, the immersion support frame 11 includes a main base and a plurality of small independent support bases. The height of the immersion support frame 11 matches the heights of the water inlet 2 and the water outlet 5 and the height of the immersion container, and can be adjusted according to the size of the immersion test piece to achieve independent immersion of the test piece.

[0043] See also Figures 1 to 4 The embodiment of the present invention also provides a method for performing an immersion corrosion experiment using the temperature-controllable immersion corrosion experiment device, comprising the following steps: Place the inner immersion box 3 or the immersion support frame 11 in the outer water bath temperature control box 1, and place the immersion container (not shown) on the immersion support frame 11; Placing a sample to be corroded in the inner layer immersion box 3 or the immersion container; Adding temperature control medium into the outer water bath temperature control box 1 and the temperature control water bath 6; Start the temperature-controlled water bath 6, and circulate the temperature-controlled medium between the outer water bath temperature-controlled box 1 and the temperature-controlled water bath 6 through a circulation pump, so as to achieve precise control of the temperature in the inner immersion box 3; The immersion corrosion experiment is carried out at a set temperature, and the temperature in the inner immersion box 3 is monitored in real time to ensure that the temperature is maintained within a preset range.

[0044] See also Figure 3 In one embodiment, a method for performing an immersion corrosion test using the temperature-controlled immersion corrosion test device comprises the following steps: Place the support rod 4 in the semicircular groove at the upper end of the inner soaking box 3; Connect the fixing rope 10 to the support rod 4; The large tubular part 9 is suspended in the center of the inner soaking box 3 by the fixing rope 10 so that the outer wall of the large tubular part 9 does not contact the inner soaking box 3; Adding a corrosive liquid into the inner layer immersion tank 3 until the corrosive liquid submerges the large tubular part 9; Start the temperature-controlled water bath 6, and circulate the temperature-controlled medium between the outer water bath temperature-controlled box 1 and the temperature-controlled water bath 6 through a circulating pump to achieve precise control of the temperature in the inner immersion box 3 and maintain the large tubular part 9 at the set temperature for the immersion corrosion experiment.

[0045] See also Figure 4 In another embodiment, a method for performing an immersion corrosion test using the temperature-controllable immersion corrosion test device comprises the following steps: Place the immersion support frame 11 in the outer water bath temperature control box 1, wherein the immersion support frame 11 includes a main base and a plurality of small independent support bases; Placing a plurality of independent immersion containers on the small independent support bases respectively, the immersion containers being used to accommodate the test pieces to be corroded; Adjusting the height of the small independent support base according to the size of the test piece to ensure that the test piece can be stably immersed in the immersion container; Add the corrosive liquid into each immersion container so that the test piece is completely immersed in the corrosive liquid; Adding temperature control medium into the outer water bath temperature control box 1 and the temperature control water bath 6; Start the temperature-controlled water bath 6, and circulate the temperature-controlled medium between the outer water bath temperature-controlled box 1 and the temperature-controlled water bath 6 through a circulation pump, so as to achieve accurate control of the temperature in the immersion container; The immersion corrosion test is carried out at a set temperature, and the temperature in the outer water bath temperature control box 1 is monitored in real time to ensure that the temperature is maintained within a preset range. The corrosion test is carried out on the test piece in each immersion container under the same temperature conditions.

[0046] The temperature-controlled immersion corrosion experimental device and experimental method of the present invention realizes precise control of the immersion temperature through the outer water bath temperature control box and the circulating water bath function of the temperature-controlled water bath, ensures the consistency and accuracy of the experimental conditions, and effectively solves the problem in the prior art that the simulated immersion corrosion experiment cannot effectively control the temperature or the temperature control cost is too high. The design of the inner immersion box or the immersion support frame is preferably an adjustable immersion support frame that can accommodate specimens of different sizes, including large tubular parts and small test pieces, to ensure the stability of objects of different sizes during immersion. In addition, by optimizing the device structure and temperature control method, the present invention significantly reduces the experimental cost and improves the experimental efficiency while effectively controlling the immersion temperature, providing an efficient and reliable experimental means for studying the corrosion behavior of materials in complex environments such as the ocean.

[0047] The specific embodiments of the present invention are further described below.

[0048] A temperature-controllable immersion corrosion test device, the method of using the device includes the following steps: placing an inner immersion box 3 or an immersion support frame 11 into an outer water bath temperature control box 1, loading the outer water bath temperature control box 1 and the temperature-controlled water bath 6 with temperature-control medium, and circulating the medium; adjusting the stable temperature of the temperature-controlled water bath 6 according to the real-time measured temperature so that the temperature in the outer water bath temperature control box 1 reaches the desired temperature; and monitoring the real-time temperature at irregular intervals.

[0049] Preferably, the temperature control medium is water, which is used as the temperature control medium because water has a high specific heat capacity and can absorb or release a large amount of heat without much temperature change. The temperature control water bath 6 utilizes the heat conduction effect of the medium to transfer heat to the reaction system, thereby achieving precise temperature control.

[0050] A low-cost and simple temperature control method is implemented by a temperature-controlled water bath 6. According to the actual capacity of the outer water bath temperature control box 1, a temperature-controlled water bath 6 of appropriate capacity is selected to ensure that the power of the temperature-controlled water bath 6 is sufficient to control the temperature of the immersion box. At the same time, there may be a temperature difference between the set temperature of the temperature-controlled water bath 6 and the temperature of the immersion box due to the volume difference, so the temperature of the temperature-controlled water bath 6 needs to be set according to the actual situation during actual temperature control.

[0051] A serial independent immersion method is implemented by a designed immersion support frame 11, allowing multiple small test pieces to be independently immersed in a small container with good thermal conductivity, and then the container is placed on the immersion support frame 11, and the immersion support frame 11 is placed in an outer water bath temperature control box 1.

[0052] A soaking method suitable for large tubular parts, the soaking method is achieved by means of a semicircular groove at the upper end of the inner soaking box 3, a support rod 4 of the same diameter can be placed on the semicircular groove for support, the support rod 4 can be connected to a fixing rope 10, and the fixing rope 10 can pass through the center of the large tubular part 9 to hang the large tubular part 9 in the center of the inner soaking box.

[0053] Example 1: Immersion corrosion test of small steel specimens The temperature-controlled immersion corrosion test device of this embodiment is as follows: Figure 4 As shown, a serial independent immersion method is adopted, and the immersion method is achieved by means of a designed immersion support frame 11.

[0054] (1) Prepare corrosion test pieces of 50 mm × 50 mm × 5 mm size, including Q235 steel test piece as blank control group, spray 45CT wire coated steel test piece, spray 316L stainless steel wire coated steel test piece, spray zinc-aluminum wire coated steel test piece, spray zirconium wire coated steel test piece; (2) Place them in 200mL beakers containing 3.5% NaCl immersion corrosion solution, so that all the test pieces are completely immersed. Divide them into two groups, a total of ten beakers, and then place them on the immersion support rack and put them together in the outer water bath temperature control box; (3) Then, circulating water was added to the outer water bath temperature control box 1 and the temperature-controlled water bath 6, the temperature of the temperature-controlled water bath 6 was set and the water bath circulation was turned on, so that the temperature in the immersion beaker was maintained at 25°C for a long time. Affected by the indoor ambient temperature and the volume ratio of the temperature-controlled water bath 6 to the volume of the outer water bath temperature control box 1 (in the experiment, the volume of the outer water bath temperature control box 1: the volume of the temperature-controlled water bath 6 = 9:1), when the temperature of the temperature-controlled water bath 6 was set to 34°C and the indoor air conditioning temperature was set to 23°C, the temperature in the beaker was maintained at 25°C.

[0055] Example 2: Immersion corrosion test of large tubular parts The temperature-controlled immersion corrosion test device of this embodiment is as follows: Figure 3 As shown, a soaking method suitable for large tubular parts is adopted, and the soaking method is achieved by means of the semicircular groove at the upper end of the inner soaking box 3.

[0056] (1) A tubular part with a total length of 718.82 mm was prepared. The part was sprayed with an anti-corrosion coating only on the outer surface. The anti-corrosion properties of the coating were tested in 45°C salt water.

[0057] (2) Pass the fixing rope 10 through the center of the large tubular part 9 to hang the part in the inner immersion box 3. The outer wall of the large tubular part 9 cannot contact the inner immersion box 3. (3) Adding a corrosive liquid into the inner immersion tank 3 so that the corrosive liquid submerges the large tubular part 9; (4) Add circulating water to the outer water bath temperature control box 1 and the temperature-controlled water bath 6, set the temperature of the temperature-controlled water bath 6 and start the water bath circulation, so that the temperature in the inner immersion box 3 is maintained at 45°C for a long time to observe the corrosion behavior of the coating at the immersion temperature.

[0058] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A temperature-controlled immersion corrosion test device, characterized in that: include: The outer water bath temperature control box is used to provide a temperature control environment; An inner immersion box or immersion support frame is used to place the sample to be corroded. The inner immersion box or immersion support frame can be selectively arranged in the outer water bath temperature control box, and the immersion container for immersing the test piece is placed on the immersion support frame; The temperature-controlled water bath is connected to the water inlet and the water outlet of the outer water bath temperature-controlled box, and the temperature in the outer water bath temperature-controlled box is precisely controlled through the circulating water bath function.

2. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: The outer layer of the outer water bath temperature control box is wrapped with a heat-insulating material, and the heat-insulating material includes a silicon dioxide nano-aerogel felt pipeline heat-insulating composite heat-insulating material, which is used to reduce heat loss.

3. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: A metal support frame is placed between the inner immersion box and the outer water bath temperature control box, and the metal support frame is used to support the inner immersion box to make the temperature rise faster.

4. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: The inner immersion box and the outer water bath temperature control box are designed to be rectangular and are made of acrylic material.

5. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: The temperature-controlled water bath includes a heating element, a temperature sensor, a circulation pump and a temperature-controlled medium tank. The heating element is used to heat the temperature-controlled medium to a preset temperature. The temperature sensor is used to monitor the temperature of the temperature-controlled medium in real time. The temperature-controlled medium tank is used to accommodate the temperature-controlled medium. The temperature-controlled water bath circulates the temperature-controlled medium between the outer water bath temperature control box and the temperature-controlled water bath through the circulation pump to achieve precise temperature control.

6. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: A semicircular groove is provided at the upper end of the inner soaking box, and the semicircular groove is used to install a support rod. The support rod supports a fixing rope passing through the large tubular part so as to suspend the large tubular part and soak it in the inner soaking box.

7. The temperature-controlled immersion corrosion test device according to claim 1 is characterized in that: The immersion support frame includes a main base and multiple small independent support bases. The height of the immersion support frame matches the heights of the water inlet and the water outlet and the height of the immersion container, and can be adjusted according to the size of the immersion test piece to achieve independent immersion of the test piece.

8. A method for conducting an immersion corrosion test using the temperature-controllable immersion corrosion test device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Place the inner soaking box or soaking support frame in the outer water bath temperature control box, and place the soaking container on the soaking support frame; Placing a sample to be corroded in the inner layer immersion box or the immersion container; Adding temperature control medium into the outer water bath temperature control box and the temperature-controlled water bath; Starting the temperature-controlled water bath, and circulating the temperature-controlled medium between the outer water bath temperature-controlled box and the temperature-controlled water bath by means of a circulation pump, so as to achieve precise control of the temperature in the inner immersion box; The immersion corrosion experiment is carried out at a set temperature, and the temperature in the inner immersion box is monitored in real time to ensure that the temperature is maintained within a preset range.

9. A method for conducting an immersion corrosion test using the temperature-controllable immersion corrosion test device according to claim 6, characterized in that: The following steps are involved: Placing the support rod in the semicircular groove at the upper end of the inner soaking box; Connecting a fixing rope to the support rod; The large tubular part is suspended in the center of the inner soaking box by the fixing rope so that the outer wall of the large tubular part does not contact the inner soaking box; Adding a corrosive liquid into the inner layer immersion tank until the corrosive liquid submerges the large tubular part; The temperature-controlled water bath is started, and the temperature-controlled medium is circulated between the outer water bath temperature-controlled box and the temperature-controlled water bath through a circulating pump to achieve precise control of the temperature in the inner immersion box and maintain the large tubular parts at the set temperature for immersion corrosion experiments.

10. A method for conducting an immersion corrosion test using the temperature-controllable immersion corrosion test device according to claim 7, characterized in that: The following steps are involved: Placing an immersion support frame in an outer water bath temperature control box, wherein the immersion support frame includes a main base and a plurality of small independent support bases; Placing a plurality of independent immersion containers on the small independent support bases respectively, the immersion containers being used to accommodate the test pieces to be corroded; Adjusting the height of the small independent support base according to the size of the test piece to ensure that the test piece can be stably immersed in the immersion container; Add the corrosive liquid into each immersion container so that the test piece is completely immersed in the corrosive liquid; Adding temperature control medium to the outer water bath temperature control box and the temperature-controlled water bath; Start the temperature-controlled water bath, and circulate the temperature-controlled medium between the outer water bath temperature-controlled box and the temperature-controlled water bath through a circulation pump, so as to achieve precise control of the temperature in the immersion container; The immersion corrosion test is carried out at the set temperature, and the temperature in the outer water bath temperature control box is monitored in real time to ensure that the temperature is maintained within the preset range. The corrosion test is carried out on the test piece in each immersion container under the same temperature conditions.

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