Detection device for corrosion inhibition effect of corrosion inhibitor

Abstract

The utility model belongs to the technical field of corrosion inhibitors, and particularly relates to a device for detecting the corrosion inhibition effect of a corrosion inhibitor. Comprising a box body; the at least two liquid storage tanks are arranged in the box body, the liquid storage tanks are used for storing corrosive liquid, and at least one ultrasonic transducer is arranged in each liquid storage tank; the weighing mechanism is used for weighing the weight of the to-be-detected sample and the contrast sample. According to the rust detection device, the ultrasonic transducer is arranged in the liquid storage tank, so that rust falls off from a detection sample, and the accuracy of a detection result is ensured while the convenience is improved.

Description

A device for detecting the corrosion inhibition effect of corrosion inhibitors Technical Field

[0001] This utility model relates to the field of corrosion inhibitor technology, and in particular to a device for detecting the corrosion inhibition effect of corrosion inhibitors. Background Technology

[0002] Corrosion inhibitors are substances used on metal surfaces to provide protection. Adding trace amounts or small quantities of these chemicals can significantly reduce the corrosion rate of metal materials in a given medium, even to the point of zero. Simultaneously, they maintain the original physical and mechanical properties of the metal material. The proper use of corrosion inhibitors is an effective method to prevent corrosion of metals and their alloys in environmental media.

[0003] Especially in the production and processing of petroleum products, chemical cleaning, atmospheric environment, industrial water, machinery and instrument manufacturing, and petrochemical production processes, corrosion inhibition technology has become one of the main means of corrosion prevention.

[0004] The corrosion inhibition effect of corrosion inhibitors is generally tested using the mass loss method, which includes the following steps:

[0005] 1. Before the experiment, accurately weigh the initial mass of the metal sample to be tested and measure its surface area.

[0006] 2. Place the metal sample to be tested in a specific environment (such as a corrosive solution) and allow it to come into contact with the corrosive medium for a certain period of time.

[0007] 3. After a certain period of time, remove the metal sample, wash it, and dry it to a constant mass.

[0008] 4. Re-weigh the metal sample and calculate its mass loss to evaluate the corrosion inhibition effect. Corrosion inhibition efficiency (%) = (1 - mass loss / mass loss control sample) × 100%.

[0009] The principle of the mass loss method is to measure the mass change of a metal sample after it has been in contact with a corrosive medium for a certain period of time. By comparing the mass loss of a control sample without corrosion inhibitor and a sample with corrosion inhibitor, the corrosion inhibition efficiency is determined. The smaller the mass loss, the better the corrosion inhibition effect.

[0010] Utility model patent CN209148652U discloses a device for detecting the corrosion inhibition effect of a corrosion inhibitor. This device involves setting up a micro-pressure sensor and a display screen. Different but equal amounts of acidic corrosive liquid are added to two spaces separated by a glass partition until the acidic corrosive liquid submerges the metal strip to a certain height. The reading on the display screen is then recorded. After a period of time, the reading is recorded again. During this period, the acidic corrosive liquid corrodes the metal strip, reducing its mass and thus the tension on the suspension rope. The pressure change detected by the micro-pressure sensor corresponds to the change in the display screen reading. By comparing the two readings, the corrosion inhibition effect of the corrosion inhibitor can be detected.

[0011] When a metal strip is corroded, rust will form on its surface. Some of the rust will separate from the metal strip and fall off, while the rest will adhere to the surface of the metal strip and cannot be removed by gravity alone. This causes certain deviations in the actual testing process of the above-mentioned public solution. To ensure the accuracy of the test, the metal strip must be removed, cleaned, and then weighed, making it difficult to achieve real-time testing.

[0012] Secondly, the situations encountered during the testing process are relatively more complex. For example, corrosion inhibitors are used relatively frequently in oil fields, and it is often necessary to use samples of oil and gas production components such as pipelines for testing. These samples are often cylindrical or cuboid in shape, unlike the metal strips used in experiments which have through holes for ropes to pass through, making the actual binding operation more complicated. Summary of the Invention

[0013] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a device for detecting the corrosion inhibition effect of corrosion inhibitors.

[0014] To achieve the above objectives, the technical solution of this utility model is as follows:

[0015] A device for detecting the corrosion inhibition effect of a corrosion inhibitor, comprising:

[0016] Box;

[0017] At least two liquid storage tanks are provided, both of which are located inside the tank. The liquid storage tanks are used to store corrosive liquids, and each liquid storage tank is equipped with at least one ultrasonic transducer.

[0018] A weighing mechanism for weighing the sample to be tested and the control sample.

[0019] Furthermore, when two liquid storage tanks are installed inside the tank, the two liquid storage tanks are located on the left and right sides of the tank.

[0020] Furthermore, a drain hole is provided at the bottom of the liquid storage tank.

[0021] Furthermore, the ultrasonic transducer is located at the bottom of the liquid storage tank.

[0022] Furthermore, the detection device for the corrosion inhibitor's corrosion inhibition effect also includes a gripping mechanism, which is located below the weighing mechanism and is used to grip the sample to be tested and the control sample.

[0023] Furthermore, the device for detecting the corrosion inhibition effect of the corrosion inhibitor also includes a lifting mechanism, the top of which is equipped with a weighing mechanism, and the lifting mechanism drives the weighing mechanism to move up and down.

[0024] Furthermore, the lifting mechanism is a lifting electric cylinder.

[0025] Furthermore, the lifting cylinder is installed inside the housing, and the movable rod of the lifting cylinder extends upward through the upper surface of the housing.

[0026] Furthermore, the upper end of the movable rod of the lifting electric cylinder is connected to a support rod, the support rod is horizontally positioned, and the weighing mechanism is installed at both ends of the support rod.

[0027] Furthermore, the weighing mechanism includes a housing, a weighing sensor is disposed inside the housing, the weighing sensor is connected to an external control system, and the weighing sensor is also connected to a gripping mechanism.

[0028] Furthermore, the gripping mechanism includes a protective shell, the weighing sensor is connected to the upper surface of the protective shell, a gripping electric cylinder arranged in a horizontal direction is installed inside the protective shell, the actuating end of the gripping electric cylinder is connected to a sliding block, the sliding block is disposed below the protective shell; a fixing block is also connected below the protective shell; the fixing block is disposed opposite to the sliding block.

[0029] Furthermore, both the sliding block and the fixed block are provided with through holes.

[0030] Furthermore, the outer side of the horizontal cross-section of the sliding block is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side; and / or, the outer side of the horizontal cross-section of the fixed block is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side.

[0031] Furthermore, both the sliding block and the fixed block are covered with rubber sleeves.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The detection device for the corrosion inhibition effect of corrosion inhibitor provided by this utility model uses an ultrasonic transducer installed at the bottom of the storage tank. The ultrasonic transducer converts electromagnetic energy into mechanical energy, causing bubbles to be generated in the corrosive liquid. The bubbles expand and contract to generate shock waves, causing rust to fall off the test sample. This improves convenience while ensuring the accuracy of the test results.

[0034] 2. This utility model has better applicability. By setting up a gripping mechanism, it can directly grip test samples with cylindrical or cuboid structures. For metal sheet samples, through holes are opened on both the sliding block and the fixed block, so that ropes can be tied. If there are many metal sheet samples, a round rod can be taken, passed through the sliding block and the fixed block, and the rope for fixing the metal sheet can be tied to the round rod, so that multiple metal sheets can be tested at one time. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a structural schematic diagram of this utility model.

[0037] Figure 2 is a schematic diagram of the gripping mechanism of this utility model.

[0038] Figure 3 is a top view of the fixed block and sliding block of this utility model.

[0039] The annotations in the attached figures are explained as follows:

[0040] 1. Housing; 2. Liquid storage tank; 21. Drain hole; 3. Ultrasonic transducer; 4. Gripping mechanism; 41. Protective shell; 42. Gripping electric cylinder; 43. Sliding block; 44. Through hole; 45. Fixing block; 5. Weighing mechanism; 51. Weighing sensor; 6. Lifting mechanism; 61. Support rod. Detailed Implementation

[0041] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] It should be noted that, unless otherwise specifically stated, the relative arrangement and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of this utility model.

[0043] The following description of exemplary embodiments is merely illustrative and is not intended to limit the present invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0044] This utility model provides a device for testing the corrosion inhibition effect of a corrosion inhibitor, as shown in Figures 1-3. It includes a housing 1, on which two liquid storage tanks 2 are arranged in the left-right direction. The liquid storage tanks 2 are used to store corrosive liquid. The bottom of the liquid storage tanks 2 is provided with a drain hole 21 for discharging the corrosive liquid. The drain hole 21 is connected to a manual or electric valve. The valve is connected to a drain pipe to discharge the liquid inside the liquid storage tank. The inner wall of the liquid storage tank 2 is provided with a scale to display the liquid level.

[0045] An ultrasonic transducer 3 is installed inside the liquid storage tank 2. Preferably, the ultrasonic transducer 3 is located at the bottom of the liquid storage tank. In other embodiments, the ultrasonic transducer can also be located on the side wall of the liquid storage tank. Furthermore, in this embodiment, two ultrasonic transducers 3 are installed in one liquid storage tank. In other embodiments, the number of ultrasonic transducers 3 can be adjusted according to the size of the liquid storage tank 2. The ultrasonic transducer 3 emits ultrasonic waves, which, through cavitation, acceleration, and direct flow in the liquid, act directly and indirectly on the sample surface, causing rust to separate and peel off. Electromagnetic energy is converted into mechanical energy, causing the rust adhering to the sample to fall off. The principle of ultrasonic rust removal is existing technology, and the specific structure of the ultrasonic transducer will not be described in detail here.

[0046] In other embodiments, the inside of the box can also be provided with other numbers of liquid storage tanks, such as four liquid storage tanks, with each pair of liquid storage tanks forming a group, to test the corrosion inhibition effect of different samples, thereby improving the testing efficiency.

[0047] In this embodiment, a lifting mechanism 6 is provided between the two liquid storage tanks. In other embodiments, the lifting mechanism 6 can also be provided on one side of the liquid storage tank 2 or on the outside of the box 1, as long as it can realize the lifting of the weighing mechanism 5.

[0048] In this embodiment, the lifting mechanism 6 is a lifting electric cylinder. The top of the lifting mechanism 6 is connected to a support rod 61 arranged in the left and right direction. A linear bearing that cooperates with the lifting electric cylinder is installed on the upper surface of the housing 1. The linear bearing is used to prevent the moving rod of the lifting electric cylinder from deviating during lifting.

[0049] A weighing mechanism 5 is provided at each of the left and right ends of the support rod 61. The weighing mechanism 5 includes a housing and a weighing sensor 51 inside the housing. The weighing sensor 51 is connected to an external control system. The weighing sensor 51 is a tension weighing sensor. In other embodiments, the weighing mechanism 5 can also be replaced by a weighing device such as an electronic hook scale.

[0050] A gripping mechanism 4 is connected below the weighing sensor 51. This gripping mechanism 4 is used to grip the sample being tested. In this embodiment, the gripping mechanism 4 includes a protective shell 41, the upper surface of which is connected to the weighing sensor 51. A gripping electric cylinder 42, arranged horizontally, is installed inside the protective shell 41. The actuating end of the gripping electric cylinder 42 is connected to a sliding block 43, which is located below the protective shell 41. A fixing block 45 is also connected below the protective shell 41, and the fixing block 45 is positioned opposite to the sliding block 43. The distance between the fixing block 45 and the sliding block 43 is adjusted by the gripping electric cylinder 42 to grip the component.

[0051] In this embodiment, the sides of the sliding block 43 and the fixed block 45 adjacent to each other are flat, and the side of the sliding block 43 away from the fixed block 45 is an arc surface. The fixed block 45 has the same structure as the sliding block 43. Specifically, the outer side of the horizontal cross-section of the sliding block 43 is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side; the outer side of the horizontal cross-section of the fixed block 45 is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side.

[0052] When gripping a rectangular test piece, the gripping electric cylinder 42 drives the sliding block 43 to move, thereby reducing the distance between the fixed block 45 and the sliding block 43 and clamping the test piece.

[0053] When gripping a cylindrical pipe test specimen, the specimen is vertically positioned. The lifting mechanism 6 extends the fixed block 45 and sliding block 43 into the cylinder. The gripping electric cylinder 42 extends, increasing the distance between the fixed block 45 and sliding block 43. The pipe test specimen is gripped by a tightening action. The arc-shaped structure of the outer surfaces of the fixed and sliding blocks increases the contact area with the inner wall of the pipe, preventing the specimen from falling off after gripping. There are various types of gripping mechanisms 4; in other embodiments, adjustments can be made according to actual conditions.

[0054] In addition, both the sliding block 43 and the fixed block 45 are provided with through holes 44. The through holes 44 can be used for binding ropes and wires, or the round rod can be fixed to the sliding block 43 and the fixed block 45 through the through holes 44, and the metal pieces can be suspended on the round rod, thereby suspending multiple metal pieces and increasing the number of metal pieces that can be detected.

[0055] In a preferred embodiment, both the sliding block 43 and the fixed block 45 are covered with rubber sleeves to increase friction, and the rubber sleeves are replaced periodically.

[0056] The working principle of this utility model is as follows: During testing, equal amounts of corrosive liquid are added to two storage tanks 2, and a corrosion inhibitor is added to one of the storage tanks 2.

[0057] When using a metal sheet sample for testing, the metal sheet sample is suspended on the fixed block 45 by a pull rope. The metal sheet sample is suspended in the air and does not contact the bottom of the liquid storage tank 2. The liquid level of the corrosive liquid is higher than the metal sheet sample, so that the metal sheet sample is completely immersed in the corrosive liquid. When the immersion time of the metal sheet sample reaches the set time, the ultrasonic transducer 3 starts to clean the metal sheet sample, so that the rust on the metal sheet sample is separated from the metal sheet. Then, the lifting mechanism 6 drives the gripping mechanism 4 to rise until the metal sheet sample is completely removed from the corrosive liquid. After that, it is left to stand still for a period of time to allow the metal sheet sample to dry. The weighing mechanism 5 weighs it and calculates the corrosion inhibition efficiency. After the metal sheet sample is suspended, no manual intervention is required throughout the process, which is more convenient.

[0058] If multiple different types of metal sheet samples are used for testing at one time, a round rod is inserted into the through hole 44 of the fixing block 45 and the sliding block 43 to fix the round rod on the fixing block 45 and the sliding block 43. Then, each metal sheet sample is tied to the round rod one by one, with the metal sheet sample suspended in the air and not in contact with the bottom of the liquid storage tank 2. The liquid level of the corrosion solution is higher than the metal sheet sample, so that the metal sheet sample is completely immersed in the corrosion solution. When the immersion time of the metal sheet sample reaches the set time, the ultrasonic transducer 3 starts to clean the metal sheet sample, so that the rust on the metal sheet sample is separated from the metal sheet. Then, the lifting mechanism 6 drives the gripping mechanism 4 to rise until the metal sheet sample is completely removed from the corrosion solution. After that, it is left to stand still for a period of time until the metal sheet sample is dry. Then, it is removed one by one and weighed by an external weighing device to calculate multiple corrosion inhibition efficiencies.

[0059] When using pipe samples for testing, a section of pipe sample is placed vertically in the storage tank 2, with the corrosive liquid level higher than the pipe sample. After the pipe sample has been immersed for a set time, the ultrasonic transducer 3 starts cleaning the pipe sample. After cleaning, the lifting mechanism 6 drives the gripping mechanism 4 to descend, causing the fixed block 45 and sliding block 43 to extend into the inside of the pipe sample. Then, the gripping electric cylinder 42 extends, and the fixed block 45 and sliding block 43 are pressed tightly against the inner wall of the pipe sample. Afterward, the lifting mechanism 6 drives the pipe sample to rise until the pipe sample leaves the corrosive liquid. After drying, it is weighed, and the corrosion inhibition efficiency is calculated.

[0060] If the sample is a cuboid structure, place it in the storage tank 2, with the corrosive liquid level above the sample. After the cuboid sample has been immersed for a set time, the ultrasonic transducer 3 starts cleaning the pipe sample. After cleaning, the lifting mechanism 6 drives the gripping mechanism 4 to descend, so that the fixed block 45 and the sliding block 43 are located on both sides of the sample. Then, the gripping cylinder 42 shortens, and the fixed block 45 and the sliding block 43 clamp the sample. Afterward, the lifting mechanism 6 drives the sample to rise until the sample leaves the corrosive liquid. After drying, weigh the sample and calculate the corrosion inhibition efficiency.

[0061] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting the corrosion inhibition effect of a corrosion inhibitor, characterized in that, include: Box; At least two liquid storage tanks are provided inside the tank. The liquid storage tanks are used to store corrosive liquids. Each liquid storage tank is equipped with at least one ultrasonic transducer. A weighing mechanism is provided to weigh the sample to be tested and the control sample.

2. The detection device according to claim 1, characterized in that, When two liquid storage tanks are installed inside the tank, the two liquid storage tanks are located on the left and right sides of the tank.

3. The detection device according to claim 1, characterized in that, A drain hole is provided at the bottom of the liquid storage tank.

4. The detection device according to claim 1, characterized in that, The ultrasonic transducer is located at the bottom of the liquid storage tank.

5. The detection device according to claim 1, characterized in that, The device for detecting the corrosion inhibition effect of the corrosion inhibitor also includes a gripping mechanism, which is located below the weighing mechanism and is used to grip the sample to be tested and the control sample.

6. The detection device according to claim 5, characterized in that, The device for detecting the corrosion inhibition effect of the corrosion inhibitor also includes a lifting mechanism, and a weighing mechanism is provided on the top of the lifting mechanism. The lifting mechanism drives the weighing mechanism to move up and down.

7. The detection device according to claim 6, characterized in that, The lifting mechanism is a lifting electric cylinder.

8. The detection device according to claim 7, characterized in that, The lifting cylinder is installed inside the housing, and the movable rod of the lifting cylinder extends upward through the upper surface of the housing.

9. The detection device according to claim 8, characterized in that, The upper end of the movable rod of the lifting electric cylinder is connected to a support rod, the support rod is horizontally set, and the weighing mechanism is set at both ends of the support rod.

10. The detection device according to claim 9, characterized in that, The weighing mechanism includes a housing, a weighing sensor is installed inside the housing, and the weighing sensor is connected to an external control system; the weighing sensor is also connected to a gripping mechanism.

11. The detection device according to claim 10, characterized in that, The gripping mechanism includes a protective shell, the upper surface of which is connected to the weighing sensor; a gripping electric cylinder arranged in a horizontal direction is installed inside the protective shell, the actuating end of which is connected to a sliding block, which is located below the protective shell; a fixing block is also connected below the protective shell; the fixing block is arranged opposite to the sliding block.

12. The detection device according to claim 11, characterized in that, Both the sliding block and the fixed block have through holes.

13. The detection device according to claim 11, characterized in that, The outer side of the horizontal cross-section of the sliding block is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side; and / or, the outer side of the horizontal cross-section of the fixed block is an arc-shaped side, and the inner side of the horizontal cross-section is a straight side.

14. The detection device according to claim 11, characterized in that, Both the sliding block and the fixed block are covered with rubber sleeves.

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