A filament electrode test cell

Abstract

The utility model belongs to the field of electrochemistry test, concretely relates to a kind of wire bundle electrode test cell.It includes test cell and upper cover, the upper cover with the test cell top detachably connected;The upper cover is equipped with at least three mounting holes, and each mounting hole is provided with a fixing structure, the fixing structure includes the fixed seat fixedly connected with upper cover, and a clamping piece connected with the fixed seat by bolt;Wherein, the fixing structure of three mounting holes is respectively used to detachably fixed wire bundle electrode, reference electrode and auxiliary electrode.The utility model realizes the quick, stable fixing position of wire bundle electrode, auxiliary electrode and reference electrode containing ruthenium gold capillary, overcomes the defect that electrode is difficult to fix in traditional device, position is not fixed, to ensure the repeatability and comparability of experimental result.

Description

Technical Field

[0001] This utility model belongs to the field of electrochemical testing, specifically relating to a wire bundle electrode test cell. Background Technology

[0002] Wire-beam electrodes (WBEs), also known as array electrodes, are composite electrodes composed of multiple micrometer-sized metal wires arranged in a regular pattern, insulated from each other, and encapsulated. The underlying principle is that by spatially discretizing a macroscopic electrode, it can both reflect the statistically averaged electrochemical behavior as a whole and simultaneously act as an independent microprobe to measure the distribution of electrochemical parameters in various micro-regions of the surface. This characteristic allows it to effectively characterize the electrochemical inhomogeneities of the electrode surface, thus possessing irreplaceable advantages in the study of mechanisms such as localized corrosion and coating failure.

[0003] However, the accuracy and reliability of electrochemical testing data for filament-tow electrodes largely depend on the structural design of the test cell. Currently, there is a lack of dedicated test cells for filament-tow electrodes in this field, and conventional beakers are commonly used as alternatives. This approach has the following inherent drawbacks: 1. Poor electrode fixation and low test repeatability: The overall structure and weight of the wire tow electrode are relatively large, and ordinary beakers lack a dedicated fixing mechanism, which makes the electrode prone to displacement or tilting during testing. This not only changes the contact area and relative position between the electrode and the electrolyte, but also makes it difficult to maintain consistent testing conditions between different experiments, seriously affecting the repeatability and comparability of experimental results.

[0004] 2. Unreasonable spatial layout of the three-electrode system affects test accuracy: Electrochemical testing requires a reasonable spatial configuration among the working electrode (filament electrode), auxiliary electrode, and reference electrode. Ordinary beakers cannot provide preset and precise electrode sites, and the relative positions of the auxiliary electrode and the filament electrode are difficult to guarantee, easily leading to uneven current line distribution and inconsistent current density in different micro-regions on the surface of the filament electrode. At the same time, the Luggin capillary of the reference electrode is difficult to maintain stably at the closest distance to the working electrode, which will introduce a significant solution ohmic drop, causing potential monitoring errors and directly affecting the accuracy of the data.

[0005] 3. Limited functionality, poor adaptability and durability: Ordinary beaker materials (such as glass) are easily corroded by highly corrosive electrolytes, affecting the lifespan of the device. Furthermore, its simple structure makes it difficult to adapt to different models and specifications of reference and auxiliary electrodes. When performing diverse testing needs, replacement and installation operations are cumbersome, resulting in poor versatility and expandability.

[0006] Therefore, existing testing devices are insufficient to meet the requirements of wire tow electrodes for testing stability, consistency, and accuracy. There is an urgent need for a wire tow electrode testing cell to address these issues. Utility Model Content

[0007] This invention addresses the technical problems existing in the prior art by providing a wire bundle electrode test cell. This structure allows each electrode to be quickly and securely installed on the test cell in a detachable manner.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A wire tow electrode test cell, comprising, Test pool; The top cover is detachably connected to the top of the test pool; The upper cover is provided with at least three mounting holes, and each mounting hole is provided with a fixing structure. The fixing structure includes a fixing seat fixedly connected to the upper cover, and a clamping member connected to the fixing seat by bolts. The fixing structures at the three mounting holes are used to detachably fix the wire bundle electrode, the reference electrode, and the auxiliary electrode, respectively.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the wire electrode has a test section exposed to the electrolyte in the test cell; The auxiliary electrode is L-shaped and is composed of a vertical section and a horizontal section integrated together. The horizontal segment extends from the bottom of the vertical segment into the test cell and is located directly below the test segment of the wire electrode, parallel to and facing the test segment, so that a uniform current field is formed between the test segment and the horizontal segment.

[0011] Furthermore, the horizontal section of the auxiliary electrode is provided with a detachable electrode head, which is made of platinum or graphite.

[0012] Furthermore, it also includes a Luggin capillary, in which the reference electrode is inserted. The Luggin capillary is fixed by a mounting hole; the mounting hole is positioned close to the filament electrode to ensure that the tip of the Luggin capillary extends between the test section of the filament electrode and the horizontal section of the auxiliary electrode.

[0013] Furthermore, the distance between the tip of the nozzle and the test segment is 0.3cm to 0.8cm.

[0014] Furthermore, an elastic rubber buffer pad is bonded to the inner side of the clamping member.

[0015] Furthermore, the fixing seat has an arc-shaped groove for accommodating the rod, and the clamping member has a corresponding arc-shaped groove. When the clamping member is fastened to the fixing seat by bolts, the two arc-shaped grooves together form a clamping hole.

[0016] Furthermore, the bottom of the test pool is provided with an anti-slip mat, which is made of rubber.

[0017] Furthermore, the test pool has liquid level markings on its side wall.

[0018] Furthermore, the top of the cover is provided with a liquid inlet, and the liquid inlet is provided with a removable sealing plug.

[0019] The beneficial effects of this utility model are: 1. This utility model provides mounting ports for the wire tow electrode, reference electrode, and auxiliary electrode by setting a top cover with at least three mounting holes and a fixing structure. This structure allows each electrode to be quickly and securely installed on the test cell in a detachable manner, solving the defects of difficult electrode fixing and random positioning when using ordinary beakers, and significantly improving the ease of operation of the test device.

[0020] 2. This embodiment achieves the spatial layout of the three-electrode system through mechanical structure design. The direct alignment and parallel relationship between the L-shaped auxiliary electrode and the wire bundle electrode ensures the uniformity of the current field. Simultaneously, by pre-positioning the mounting hole for fixing the Luggin capillary close to the wire bundle electrode and precisely controlling the distance between its tips, the Luggin capillary can be repeatedly positioned at the potential measurement point. The combination of these two methods fundamentally solves the problems of uneven current distribution and large ohmic drop caused by arbitrary electrode placement, significantly improving the accuracy and repeatability of the test. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the wire bundle electrode test cell described in this embodiment; Figure 2 This is a schematic diagram of the structure of the wire bundle electrode test cell described in this embodiment.

[0022] The attached diagram lists the components represented by each number as follows: 1. Wire bundle electrode, 2. Auxiliary electrode; 21. Vertical segment; 22. Horizontal segment. 3. Reference electrode, 4. Lugin capillary tube, 41. Tip section, 5. Top cover, 6. Test pool, 71. Clamping parts; 72. Fixing base; 73. Bolts. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0026] Example This embodiment provides a wire bundle electrode test cell 6, such as Figure 1-2 As shown, including, Test pool 6; The top cover 5 is detachably connected to the top of the test pool 6; The upper cover 5 is provided with at least three mounting holes, and each mounting hole is provided with a fixing structure. The fixing structure includes a fixing seat 72 fixedly connected to the upper cover 5, and a clamping member 71 connected to the fixing seat 72 by a bolt 73. The fixing structures at the three mounting holes are used to detachably fix the wire bundle electrode 1, the reference electrode 3, and the auxiliary electrode 2, respectively.

[0027] The inner side of the clamping member 71 is bonded with an elastic rubber buffer pad.

[0028] The fixing seat 72 has an arc-shaped groove for accommodating the rod, and the clamping member 71 has a corresponding arc-shaped groove. When the clamping member 71 is fastened to the fixing seat 72 by the bolt 73, the two arc-shaped grooves together form a clamping hole.

[0029] In this embodiment, it should be noted that the upper cover 5 and the fixing base 72 are integrally formed, and the test cell 6 is made of borosilicate glass or polytetrafluoroethylene, forming a reaction chamber inside for containing the electrolyte. The upper cover 5 is detachably connected to the top of the test cell 6 by a sealing ring to achieve a seal.

[0030] The inner side of the clamping member 71 is bonded with an elastic rubber buffer pad to prevent damage to the electrode during clamping. The fixing base 72 has an arc-shaped groove for accommodating the rod, and the clamping member 71 has a corresponding arc-shaped groove. When the clamping member 71 is fastened to the fixing base 72 by the bolt 73, the two arc-shaped grooves together form a clamping hole, thereby achieving stable fixation of the electrode.

[0031] In one possible implementation, the wire electrode 1 has a test section exposed to the electrolyte in the test cell 6; The auxiliary electrode 2 is L-shaped and is integrally formed by a vertical section 21 and a horizontal section 22. The horizontal segment 22 extends from the bottom of the vertical segment 21 into the test cell 6 and is located directly below the test segment of the wire electrode 1, parallel to and facing the test segment, so that a uniform current field is formed between the test segment and the horizontal segment 22.

[0032] The auxiliary electrode 2 has a detachable electrode head at the end of its horizontal segment 22. The electrode head is made of platinum or graphite.

[0033] In this embodiment, by arranging the horizontal segment 22 of the auxiliary electrode 2 directly below the test segment of the wire bundle electrode 1, and ensuring that the two maintain a parallel and oriented spatial relationship, current is uniformly emitted from the horizontal segment 22 of the auxiliary electrode 2 to the entire surface of the test segment of the wire bundle electrode 1. This symmetrical electrode layout can establish a uniformly distributed current field in the electrolyte between the two electrodes, effectively avoiding electric field concentration or edge effects caused by electrode position deviations. This ensures that the electrochemical environment of each microelectrode unit on the surface of the wire bundle electrode 1 is consistent, providing the necessary field conditions for accurately measuring its surface potential distribution and electrochemical parameters. It should be noted that the electrode tip is made of platinum or graphite material to adapt to different testing requirements.

[0034] In one possible implementation, a Luggin capillary 4 is also included, in which the reference electrode 3 is inserted. The Luggin capillary 4 is fixed by a mounting hole; the mounting hole is positioned close to the filament electrode 1 to ensure that the tip portion 4 of the Luggin capillary 4 extends between the test section of the filament electrode 1 and the horizontal section 22 of the auxiliary electrode 2.

[0035] The distance between the tip of the nozzle portion 4 and the test segment is 0.3cm to 0.8cm.

[0036] In this embodiment, the mounting hole is pre-positioned during design and manufacturing to be close to the mounting hole of the fixed wire bundle electrode 1. This design ensures that after the Luggin capillary 4 is installed, the tip of the Luggin capillary 4 can be fixed within a range of 0.3 cm to 0.8 cm from the test section of the wire bundle electrode 1. Its working principle is to minimize the ohmic drop error caused by solution resistance by minimizing the solution distance between the measurement point of the reference electrode 3 and the working electrode. The purpose is to improve the accuracy of potential monitoring of the wire bundle electrode 1, thereby ensuring the reliability of the entire electrochemical test data.

[0037] In one possible implementation, the bottom of the test pool 6 is provided with an anti-slip pad, which is made of rubber.

[0038] In one possible implementation, the test pool 6 has liquid level markings on its sidewall.

[0039] It should be noted that this scale not only facilitates the control of electrolyte volume, but also makes it easy to observe and adjust the immersion height of each electrode during installation, ensuring the consistency of the relative positions of the electrodes.

[0040] In one possible implementation, the top of the upper cover 5 is provided with a liquid inlet, which has a removable sealing plug to facilitate the injection of electrolyte and prevent evaporation.

[0041] The installation process in this embodiment is as follows: Step 1: Install and position the wire bundle electrode 1. Secure the wire bundle electrode 1 using a fixing structure. Ensure that it has a test section exposed to the electrolyte, suspended vertically in the center of the test cell 6.

[0042] Step 2: Install the L-shaped auxiliary electrode 2 and form a uniform electric field. Take an auxiliary electrode 2, which is L-shaped and consists of a vertical section 21 and a horizontal section 22 integrally formed. Clamp its vertical section 21 with another fixing structure. During installation, adjust its orientation so that its horizontal section 22 extends from the bottom of the vertical section 21 into the test cell 6, and finally is located directly below the test section of the wire bundle electrode 1, and is parallel and opposite to the test section. This layout is intended to form a uniform current field between the test section and the horizontal section 22. In addition, at the end of the horizontal section 22 of the auxiliary electrode 2, there is a detachable electrode head. In this embodiment, the electrode head is made of platinum sheet, but the user can also replace it with a graphite electrode head to adapt to different testing needs.

[0043] Step 3: Install the Luggin capillary 4. Insert the reference electrode 3 into the Luggin capillary 4, and then fix the rod of the Luggin capillary 4 through the third fixing structure, ensuring that its tip 4 can extend between the test section of the wire bundle electrode 1 and the horizontal section 22 of the auxiliary electrode 2.

[0044] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the methods, systems, and devices described above are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A wire bundle electrode test cell, characterized in that, include, Test pool; The top cover is detachably connected to the top of the test pool; The upper cover is provided with at least three mounting holes, and each mounting hole is provided with a fixing structure. The fixing structure includes a fixing seat fixedly connected to the upper cover, and a clamping member connected to the fixing seat by bolts. The fixing structures at the three mounting holes are used to detachably fix the wire bundle electrode, the reference electrode, and the auxiliary electrode, respectively.

2. The wire bundle electrode test cell according to claim 1, characterized in that, The wire electrode has a test section exposed to the electrolyte in the test cell; The auxiliary electrode is L-shaped and is composed of a vertical section and a horizontal section integrated together. The horizontal segment extends from the bottom of the vertical segment into the test cell and is located directly below the test segment of the wire electrode, parallel to and facing the test segment, so that a uniform current field is formed between the test segment and the horizontal segment.

3. The wire bundle electrode test cell according to claim 2, characterized in that, The horizontal section of the auxiliary electrode is provided with a detachable electrode head, which is made of platinum or graphite.

4. The wire bundle electrode test cell according to claim 2, characterized in that, It also includes a Luggin capillary, in which the reference electrode is inserted. The Luggin capillary is fixed by a mounting hole; the mounting hole is positioned close to the filament electrode to ensure that the tip of the Luggin capillary extends between the test section of the filament electrode and the horizontal section of the auxiliary electrode.

5. The wire bundle electrode test cell according to claim 4, characterized in that, The distance between the tip of the nozzle and the test segment is 0.3cm to 0.8cm.

6. The wire bundle electrode test cell according to claim 1, characterized in that, An elastic rubber buffer pad is bonded to the inside of the clamping member.

7. The wire bundle electrode test cell according to claim 1, characterized in that, The fixing seat has an arc-shaped groove for accommodating the rod, and the clamping member has a corresponding arc-shaped groove. When the clamping member is fastened to the fixing seat by bolts, the two arc-shaped grooves together form a clamping hole.

8. The wire bundle electrode test cell according to claim 1, characterized in that, The bottom of the test pool is equipped with an anti-slip mat, which is made of rubber.

9. The wire bundle electrode test cell according to claim 1, characterized in that, The test pool has liquid level markings on its side wall.

10. The wire bundle electrode test cell according to claim 1, characterized in that, The top of the cover is provided with a liquid inlet, and the liquid inlet is provided with a removable sealing plug.

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