Steel wire corrosion electrochemical test device capable of loading stress

Abstract

The utility model discloses a steel wire corrosion electrochemical test device capable of loading stress, which relates to the field of electrochemical corrosion and comprises a loading component, and the loading component comprises two loading steel plates which are oppositely arranged and used for respectively fixing two ends of a steel wire to be tested. The stress applying unit is located between the two loading steel plates and used for adjusting the distance between the two loading steel plates, and the stress applying unit comprises a telescopic oil cylinder; and the testing assembly comprises an electrolytic solution box through which the steel wire to be tested passes, and a testing electrode unit is arranged on the electrolytic solution box. A to-be-tested steel wire is fixed through the two loading steel plates, the distance between the two loading steel plates is increased through the stretching action of the telescopic oil cylinder, and based on the structure linkage effect, the tensile force can be applied to the to-be-tested steel wire, so that the stress condition of the to-be-tested steel wire in actual work is simulated, and the testing accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical corrosion, specifically to an electrochemical testing device for steel wire corrosion that can be subjected to applied stress. Background Technology

[0002] Electrochemical corrosion is one of the most widespread types of corrosion. In practical engineering applications of metal wires, electrochemical corrosion is usually accompanied by stress and various corrosive media. In recent years, with the continuous development of bridge construction, the mechanical properties of cable wires have also been continuously optimized. As the main load-bearing components of suspension bridges and cable-stayed bridges, cable wires are exposed to the atmospheric environment and suffer from high temperature and acid rain corrosion for a long time, which places high demands on the stress corrosion resistance of the wires. The characteristic of stress corrosion cracking is that it causes the structure to suddenly fail brittlely before reaching its ultimate tensile strength. It is more threatening and unpredictable than traditional failure modes, posing a serious threat to life and property safety. Therefore, the study of stress corrosion of steel wires is of great significance to the development of bridge engineering.

[0003] Traditional electrochemical corrosion testing of metallic materials typically involves testing and analyzing metal samples in an electrolytic cell. However, this method does not subject the metal to external forces during the test, failing to accurately reflect the material's service condition in actual engineering applications. According to the Nernst equation, under stress, the Gibbs function of the material's interaction with the corrosive environment is affected by strain energy, and parameters such as electrode potential are also influenced. Consequently, the structures studied in electrochemical behavior studies, such as polarization curves and impedance spectra, change simultaneously. Therefore, traditional testing methods have limitations in assessing the durability of actual metallic materials. Utility Model Content

[0004] This application provides a stress-loadable electrochemical corrosion testing device for steel wire, which can solve the technical problem that traditional electrochemical corrosion tests for metal materials cannot simulate the stress state of metal materials in actual engineering applications, thus limiting the evaluation of the durability of metal materials.

[0005] This application provides an electrochemical testing device for steel wire corrosion that can be subjected to applied stress, characterized in that it includes:

[0006] The loading assembly includes two loading steel plates arranged opposite each other for fixing the two ends of the steel wire to be tested, and a stress application unit located between the two loading steel plates for adjusting the distance between the two loading steel plates. The stress application unit includes a telescopic hydraulic cylinder.

[0007] The test assembly includes an electrolytic solution box for the steel wire to be tested to pass through, and the electrolytic solution box is provided with a test electrode unit.

[0008] In one embodiment, the loading steel plate is provided with a wire fixing hole, and a wire fixing nut is provided on the side of the loading steel plate away from the stress application unit, which is opposite to the position of the wire fixing hole.

[0009] In one embodiment, the stress application unit further includes a connecting column, one end of which passes through a loading steel plate and the other end of which passes through another loading steel plate.

[0010] In one embodiment, locking units are provided at both ends of the connecting column. The locking unit includes a locking nut located on the side of the loading steel plate away from the stress application unit and an adjusting nut located on the side of the loading steel plate close to the stress application unit.

[0011] In one embodiment, the electrolyte solution box includes an electrolytic cell and a cell cover.

[0012] In one embodiment, a wire through hole is provided on each of the two side walls of the electrolytic cell facing the two loading steel plates.

[0013] In one embodiment, the test electrode unit extends through the tank cover.

[0014] In one embodiment, the test electrode unit includes a reference electrode and a counter electrode.

[0015] In one embodiment, the test assembly further includes a strain gauge for monitoring the stress of the steel wire under test.

[0016] In one embodiment, the test assembly further includes an electrochemical workstation for connecting the steel wire to be tested and the test electrode unit.

[0017] The beneficial effects of the technical solutions provided in this application include:

[0018] By setting two loading steel plates, the steel wire to be tested can be fixed. By setting a telescopic cylinder between the two loading steel plates, the distance between the two loading steel plates can be increased according to experimental requirements. Through structural linkage, the force of the telescopic cylinder is transmitted to the steel wire to be tested to simulate the stress situation of the steel wire to be tested in actual work. With the help of the electrolytic solution box through which the steel wire to be tested passes, the accuracy of the experiment can be significantly improved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a stress-loadable electrochemical testing device for steel wire corrosion is provided in this application embodiment;

[0021] Figure 2 This is a schematic diagram of the loading component structure in an electrochemical testing device for steel wire corrosion that can be subjected to applied stress, provided in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the electrolytic solution box structure in an electrochemical testing device for steel wire corrosion that can be subjected to applied stress, provided as an embodiment of this application.

[0023] In the diagram: 1. Loading steel plate; 101. Steel wire fixing hole; 102. Steel wire fixing nut; 2. Stress application unit; 201. Connecting column; 202. Telescopic cylinder; 3. Electrolytic solution box; 301. Electrolytic cell; 302. Cell cover; 303. Steel wire through hole; 4. Test electrode unit; 401. Reference electrode; 402. Counter electrode; 5. Locking unit; 501. Locking nut; 502. Adjusting nut; 6. Electrochemical workstation; 7. Steel wire to be tested. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0025] This application provides a stress-loadable electrochemical corrosion testing device for steel wire, which solves the technical problem that traditional electrochemical corrosion tests for metal materials cannot simulate the stress state of metal materials in actual engineering applications, thus limiting the evaluation of the durability of metal materials.

[0026] The electrochemical corrosion testing device for steel wire with loadable stress in this application includes a loading component and a testing component. The loading component is used to fix the steel wire 7 to be tested and to apply a certain stress to the steel wire 7 to be tested according to experimental requirements, so as to simulate the stress situation of the steel wire 7 under actual operation. At the same time, the steel wire 7 to be tested passes through the testing component. The testing component is mainly used to conduct electrochemical corrosion tests on the steel wire 7 under applied stress. The two work together to provide more accurate experimental results.

[0027] Specifically, Figure 1 This is a schematic diagram of a stress-loadable electrochemical testing device for steel wire corrosion, provided in an embodiment of this application. Figure 2 A schematic diagram of the loading component structure in an electrochemical testing device for steel wire corrosion that can be subjected to applied stress, provided in an embodiment of this application, is shown below. Figure 1 , Figure 2 As shown, the loading assembly includes two loading steel plates 1 arranged opposite each other for fixing the two ends of the steel wire 7 to be tested, and a stress application unit 2 located between the two loading steel plates 1 for adjusting the distance between the two loading steel plates 1. The stress application unit 2 includes a telescopic cylinder 202.

[0028] The loading steel plate 1 is preferably made of stainless steel. The two ends of the steel wire 7 to be tested pass through the two loading steel plates 1 for fixation. The fixed end of the telescopic cylinder 202 in the stress application unit 2 abuts against one of the loading steel plates 1, and the telescopic end abuts against the other loading steel plate 1. The extension action of the telescopic cylinder 202 increases the distance between the two loading steel plates 1. Based on the structural action, when the two loading steel plates 1 move away from each other, the steel wire 7 fixed to the two loading steel plates 1 will be subjected to a certain tension to simulate the actual stress on the steel wire 7. In one possible implementation, this tensile force is maintained between 50% and 75% of the yield load of the steel wire 7 to be tested.

[0029] Furthermore, the test assembly includes an electrolytic solution box 3 through which the steel wire 7 to be tested passes, and a test electrode unit 4 is provided on the electrolytic solution box 3. At the same time, the test assembly also includes an electrochemical workstation 6 for connecting the steel wire 7 to be tested and the test electrode unit 4.

[0030] The Electrochemical Workstation 6 is a modular electrochemical comprehensive testing instrument integrating a potentiostat, a galvanostat, and a frequency response analyzer. Essentially, it is an instrument used to control and monitor changes in the current, potential, and other electrochemical parameters of an electrochemical cell. Under computer control, it can perform multiple testing functions, including open-circuit potential monitoring, potentiostatic polarization, potentiodynamic scanning, cyclic voltammetry, potentiostatic square wave, potentiostatic step, and electrochemical noise monitoring. The Electrochemical Workstation 6 is a commonly used device in this field and will not be described in further detail here.

[0031] When the assembly is complete, the two loading steel plates 1 fix the two ends of the steel wire 7 to be tested respectively. The electrolytic solution box 3 contains an electrolytic solution, and the steel wire 7 to be tested passes through the electrolytic solution box 3. The test electrode unit 4 on the electrolytic solution box 3 has a certain current. The steel wire 7 to be tested and the test electrode unit 4 are both connected to the test port of the electrochemical workstation 6 via wires to complete the electrochemical corrosion test.

[0032] The electrochemical testing device for steel wire corrosion under load in this application can fix the steel wire 7 to be tested by setting two loading steel plates 1. By setting a telescopic cylinder 202 between the two loading steel plates, the distance between the two loading steel plates can be increased according to experimental requirements. Based on the structural action, the tensile force is transferred to the steel wire 7 to be tested to simulate the stress situation of the steel wire 7 in actual work. With the help of the electrolytic solution box 3 through which the steel wire 7 to be tested passes, the accuracy of the experiment can be significantly improved.

[0033] Furthermore, the loading steel plate 1 is provided with a wire fixing hole 101. The diameter of the wire fixing hole 101 is larger than the diameter of the steel wire 7 to be tested, and the wire fixing holes 101 on the two loading steel plates 1 are positioned opposite each other so that the two ends of the steel wire 7 to be tested pass through the wire fixing holes 101 on the two loading steel plates 1 respectively. In one possible embodiment, in order to ensure uniform force, a wire fixing hole 101 is provided at both ends of each loading steel plate 1 to facilitate the simultaneous testing of the two steel wires 7 to be tested. At this time, the telescopic cylinder 202 is located between the two through holes.

[0034] Further, see Figure 2 The loading steel plate 1 has a wire fixing nut 102 on the side away from the stress application unit 2, which is opposite to the position of the wire fixing hole 101. As described above, the test wire 7 passes through the loading steel plate 1, which means that the test wire 7 extends out of the loading steel plate 1. The wire fixing nut 102 is set at the end of the test wire 7 that extends out of the loading steel plate 1 and is attached to the side of the loading steel plate 1 away from the stress application unit 2. The wire fixing nut 102 can limit the loading steel plate 1, prevent the loading steel plate 1 from coming out of the test wire 7 under the push of the telescopic cylinder 202, and ensure the normal tension of the test wire 7.

[0035] Furthermore, the stress application unit 2 also includes a connecting column 201. One end of the connecting column 201 passes through a loading steel plate 1, and the other end passes through another loading steel plate 1. The connecting column 201 is mainly used to support the two loading steel plates 1 and guide the movement path of the loading steel plates 1. Both ends of the connecting column 201 are provided with locking units 5, which are mainly used to maintain the current distance between the two loading steel plates 1 and the current tensile state of the steel wire 7 to be tested. Specifically, the locking unit 5 includes a locking nut 501 located on the side of the loading steel plate 1 away from the stress application unit 2 and an adjusting nut 502 located on the side of the loading steel plate 1 closer to the stress application unit 2. The locking nut 501 and the adjusting nut 502 together clamp the loading steel wire 7. In practical applications, plate 1 is first fixed with one locking nut 501, while the other locking nut 501 and the two adjusting nuts 502 are not in contact with the loading steel plate 1. Then, the telescopic cylinder 202 is extended, increasing the distance between the two loading steel plates 1, and the steel wire 7 to be tested is stretched. At this time, the adjusting nut 502 and the other locking nut 501 are rotated until they contact the loading steel plate 1. Due to the thread engagement, the current position of the loading steel plate 1 and the current tension state of the steel wire 7 to be tested are fixed. At the same time, through the setting of the locking unit 5, the telescopic cylinder 202 can be removed after the stress adjustment is completed, preventing the telescopic cylinder 202 from affecting the subsequent experimental process.

[0036] Furthermore, Figure 3 A schematic diagram of the electrolytic solution box 3 in a stress-loadable electrochemical testing device for steel wire corrosion is provided in this application embodiment. Figure 3 As shown, the electrolyte solution box 3 includes an electrolytic cell 301 and a cell cover 302. The cell cover 302 is detachably connected to the electrolytic cell 301 to facilitate the injection and pouring of the electrolyte solution. The electrolytic cell 301 has a wire through hole 303 on each of its two side walls facing the two loading steel plates 1. The two wire through holes 303 are positioned opposite each other and the diameter of the wire through hole 303 is larger than the outer diameter of the steel wire 7 to be tested, so that the steel wire 7 to be tested can pass through. The test electrode unit 4 passes through the cell cover 302 and enters the electrolytic cell 301. The test electrode unit 4 includes a reference electrode 401 and a counter electrode 402.

[0037] The reference electrode 401 is an electrode with a known and constant potential, serving as a benchmark for potential measurement. In electrochemical testing, the electrode potential of the reference electrode 401 is accurately known, thus it can be used to measure and compare the potentials of other electrodes. The counter electrode 402, also known as the auxiliary electrode, primarily provides current to enable the desired electrochemical reaction to occur on the working electrode. The electrochemical reaction occurring on the counter electrode 402 generally does not require special attention, as it only serves to transfer current. The reference electrode 401 and counter electrode 402 are commonly used devices in electrochemical corrosion testing and are essential conditions for such tests; therefore, they will not be elaborated upon further here.

[0038] Furthermore, the testing assembly also includes a strain gauge for monitoring the stress of the steel wire 7 under test. In one possible implementation, the strain gauge is placed on the steel wire 7 under test to monitor the current stress of the steel wire 7 under test in real time, ensuring that the stress changes throughout the entire experimental process are understood, preventing the experimental accuracy from being reduced due to insufficient stress, or the steel wire 7 under test from breaking due to excessive stress.

[0039] The operating procedure of the electrochemical testing device for steel wire corrosion under load in this application is as follows: First, in the stress adjustment stage, the loading component is placed vertically and the steel wire 7 to be tested is assembled. The two locking nuts 501 are fixed and the telescopic cylinder 202 is extended to stretch the steel wire 7 to be tested. Then, the adjusting nut 502 is used to maintain the stretched state of the steel wire 7 to be tested. The telescopic cylinder 202 is then removed. After the stress adjustment is completed, the testing stage begins. The loading component is placed horizontally with the tank cover 302 facing upwards. Then, the electrolyte solution is injected into the electrolytic tank 301 so that the electrolyte solution soaks through the steel wire 7 to be tested. Finally, the steel wire 7 to be tested and the test electrode unit 4 are connected to the electrochemical workstation 6 to complete the experiment.

[0040] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0041] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A stress-chargeable steel wire corrosion electrochemical test device, characterized by, The utility model relates to a steel wire stress testing device, which comprises a loading assembly and a testing assembly. The loading assembly comprises two loading steel plates (1) arranged oppositely for fixing two ends of a steel wire (7) to be tested respectively, and a stress applying unit (2) located between the two loading steel plates (1) for adjusting the distance between the two loading steel plates (1), wherein the stress applying unit (2) comprises a telescopic oil cylinder (202). The testing assembly comprises an electrolytic solution box (3) for the steel wire (7) to pass through, and a testing electrode unit (4) arranged on the electrolytic solution box (3).

2. A corrosion electrochemical test device of a loadable stress steel wire according to claim 1, wherein The loading steel plate (1) is provided with a steel wire fixing hole (101), and the side of the loading steel plate (1) away from the stress applying unit (2) is provided with a steel wire fixing nut (102) opposite to the position of the steel wire fixing hole (101).

3. A corrosion electrochemical test device of a loadable stress steel wire according to claim 1, wherein The stress applying unit (2) further comprises a connecting column (201), one end of which penetrates one loading steel plate (1) and the other end of which penetrates the other loading steel plate (1).

4. A corrosion electrochemical test device of a loadable stress steel wire according to claim 3, wherein Both ends of the connecting column (201) are provided with locking units (5), which comprise a locking nut (501) arranged on the side of the loading steel plate (1) away from the stress applying unit (2) and an adjusting nut (502) arranged on the side of the loading steel plate (1) close to the stress applying unit (2).

5. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 1, wherein The electrolytic solution box (3) comprises an electrolytic tank (301) and a tank cover (302).

6. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 5, wherein The electrolytic tank (301) is provided with a steel wire penetrating hole (303) on each side wall facing the two loading steel plates (1).

7. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 6, wherein The testing electrode unit (4) penetrates the tank cover (302).

8. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 7, wherein The testing electrode unit (4) comprises a reference electrode (401) and a counter electrode (402).

9. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 1, wherein The testing assembly further comprises a strain gauge for monitoring the stress of the steel wire (7) to be tested.

10. A corrosion electrochemical test device of a loadable stress steel wire as defined in claim 1, wherein The testing assembly further comprises an electrochemical workstation (6) for connecting the steel wire (7) to be tested and the testing electrode unit (4).

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