Electrochemical testing device suitable for single working electrode system

Abstract

The invention belongs to the field of electrochemical testing, and particularly relates to an electrochemical testing device suitable for a single working electrode system, the electrochemical testing device comprises a tank body, a working plate and a pressing plate which are connected in sequence, and an electrolyte cavity is formed in the tank body and used for containing various types of electrolyte solutions; the electrolyte solution is in contact with the working electrode through the working electrode communicating hole of the working plate, and the working electrode installed on the outer side of the working electrode communicating hole is pressed and fixed through the pressing plate. The distance between the working plate and the pressing plate can be adjusted through four sets of adjusting bolts and adjusting nuts, and the pressing plate is parallel to the back face of a working sample and can adapt to working electrodes of various shapes and sizes. The device is stable in structure, convenient to assemble, convenient for solution replacement and electrode clamping, and suitable for electrochemical tests under single working electrode systems such as alternating-current impedance spectroscopy and linear polarization scanning of systems such as metal and coatings.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical testing, specifically relating to an electrochemical testing device suitable for a single working electrode system. Background Technology

[0002] In electrochemical research, tests such as AC impedance spectroscopy and linear polarization scanning are generally performed using a single working electrode system. The testing process requires a three-electrode system consisting of a working electrode, a reference electrode, and an auxiliary electrode, all immersed in an electrolyte solution. Therefore, electrochemical testing devices suitable for a single working electrode system typically need to include a cavity to contain the electrolyte solution and a structure to fix the three-electrode system. Furthermore, it is necessary to ensure that the three electrodes maintain a specific positional relationship during installation; for example, the working electrode and auxiliary electrode need to be parallel and opposite each other, the reference electrode is generally placed in a Luggin capillary, and the end of the Luggin capillary and the surface of the working electrode need to be close but not in contact.

[0003] Existing electrochemical testing devices with single working electrodes suffer from structural complexity and insufficient sealing, leading to significant fluctuations in electrochemical test data. Furthermore, when the electrode clamping is unstable, not only is it difficult to secure the metal sample, but the effective area of ​​the working electrode also becomes inconsistent. Some existing testing devices also exhibit poor adaptability to electrode shapes and sizes, typically requiring sample pre-treatment for the working electrode, increasing operational complexity, and making it difficult to test samples that cannot be pre-mounted. In addition, the testing involves electrolyte solution replacement, which in some existing devices is complex and slow, impacting testing efficiency.

[0004] Therefore, there is an urgent need to develop an electrochemical testing device with a simple and stable structure, easy assembly, solution replacement, and electrode clamping, suitable for single working electrode systems, to achieve convenient, stable, and reliable testing performance. Summary of the Invention

[0005] This invention proposes an electrochemical testing device suitable for a single working electrode system, in order to solve the problems of complex structure and insufficient sealing of existing electrochemical testing devices.

[0006] To achieve the above objectives, the present invention proposes the following technical solution: An electrochemical testing device suitable for a single working electrode system includes a tank, a working plate, a clamping plate, a working electrode connecting hole, an electrolytic cell cover, and a slot. The tank has a rectangular electrolyte cavity in the middle, and the top of the tank has a recessed slot. The electrolytic cell cover is located inside the slot, and the electrolytic cell cover has auxiliary electrode placement holes and reference electrode placement holes. One side of the tank is connected to one end of the working plate, and the other end of the working plate is connected to the clamping plate. A clamping bolt is provided in the center of the clamping plate. The upper outer side of the working plate is provided with a groove, and the center of the working plate is provided with a working electrode connecting hole.

[0007] Preferably, the upper outer side of the working plate is provided with a groove.

[0008] Preferably, a gasket groove is provided on the outside of the working electrode connecting hole.

[0009] Preferably, the working plate and the clamping plate are connected by four sets of adjusting bolts and adjusting nuts.

[0010] Preferably, the adjusting bolt and adjusting nut are made of stainless steel.

[0011] Preferably, the clamping bolt is made of polytetrafluoroethylene.

[0012] Preferably, the groove and the clamping plate are made of acrylic.

[0013] The advantages of this invention are: This invention proposes an electrochemical testing device suitable for a single working electrode system, comprising a tank, a working plate, and a clamping plate. The tank contains an electrolyte chamber to hold various electrolyte solutions. The electrolyte solutions contact the working electrode through a working electrode connection hole on the working plate. The working electrode is mounted outside the connection hole and is adjusted and fixed by the clamping plate. This device has a simple and stable structure, is easy to assemble and adjust, and is suitable for electrochemical testing of single working electrode systems such as AC impedance spectroscopy and linear polarization scanning in metal and coating systems. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of an electrochemical testing device suitable for a single working electrode system. Figure 2 This is a top view of the structure of an electrochemical testing device suitable for a single working electrode system. Figure 3 This is a cross-sectional view of an electrochemical testing device suitable for a single working electrode system. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0016] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0017] Example 1: Please see Figure 1 , 2 As shown in Figure 3, the present invention provides an electrochemical testing device suitable for a single working electrode system, including a tank 1, a working plate 2, a clamping plate 3, an electrolyte chamber 4, a working electrode connecting hole 5, a reference electrode placement hole 6, an auxiliary electrode placement hole 7, a washer groove 8, a groove 9, a clamping bolt 10, an adjusting bolt 11, an adjusting nut 12, an electrolytic cell cover 13, and a slot 14.

[0018] The tank 1 has a rectangular electrolyte cavity 4 in the middle. The upper part of the tank 1 has a recessed slot 14. An electrolytic cell cover 13 is installed inside the slot 14. The electrolytic cell cover 13 is inserted into the slot 14 for assembly and can be freely pulled out and moved after assembly.

[0019] The electrolytic cell cover 13 is provided with a reference electrode placement hole 6 and an auxiliary electrode placement hole 7.

[0020] One side of the tank 1 is an integral working plate 2. The upper outer side of the working plate 2 is provided with a groove 9. The center of the working plate 2 is a working electrode connecting hole 5. The outer side of the working electrode connecting hole 5 is provided with a gasket groove 8 for placing a rubber gasket.

[0021] The working plate 2 and the clamping plate 3 are connected and assembled by four sets of adjusting bolts 11 and adjusting nuts 12, and a clamping bolt 10 is provided at the center of the clamping plate 3.

[0022] This invention proposes an electrochemical testing device suitable for a single working electrode system. The tank 1 is provided with an electrolyte chamber 4 for holding various types of electrolyte solutions. The electrolyte solutions contact the working electrodes through the working electrode communication holes 5 of the working plate 2. The working electrodes installed on the outside of the working electrode communication holes 5 are pressed and fixed by the clamping plate 3.

[0023] The reference electrode placement hole 6 of the electrolytic cell cover 13 is used to place a cork for fixing the Luggin capillary and the reference electrode, and the auxiliary electrode placement hole 7 is used to place a cork for fixing the auxiliary electrode. The distance between the working plate 2 and the clamping plate 3 can be adjusted by four sets of adjusting bolts 11 and adjusting nuts 12. The clamping plate 3 is parallel to the back of the working sample and can accommodate working electrodes of various shapes and sizes.

[0024] The present invention has a stable structure, is easy to assemble, replace solutions and clamp electrodes, and is suitable for electrochemical testing in single working electrode systems such as AC impedance spectroscopy and linear polarization scanning of metal, coating and other systems. Example

[0025] For electrochemical impedance spectroscopy (EIS) testing, the electrochemical testing apparatus described in Example 1 can be operated using the following steps: The first step is to place the working electrode in the working electrode connecting hole 5, and then tighten the working electrode with the clamping bolt 10 to ensure that it is tightly attached to the rubber ring and has good sealing performance.

[0026] The second step is to inject electrolyte solution into the electrolyte chamber 4, ensuring that the liquid level covers the working electrode connecting hole.

[0027] The third step is to remove air bubbles from the surface of the working electrode, place the cork containing the Luggin capillary into the reference electrode placement hole 6, and then insert the reference electrode into the upper end of the Luggin capillary.

[0028] Fourth step: Place the cork containing the auxiliary electrode into the auxiliary electrode placement hole 7, ensuring that the auxiliary electrode is placed parallel to the working electrode.

[0029] The fifth step is to connect the electrodes corresponding to the assembled electrochemical testing device to the electrochemical workstation and perform electrochemical impedance spectroscopy (EIS) testing.

[0030] In this embodiment, the tank 1 and the clamping plate 3 are made of acrylic, the Lugin capillary tube is made of glass, the clamping bolt 10 is made of polytetrafluoroethylene, and the adjusting bolt 11 and the adjusting nut 12 are made of stainless steel.

[0031] The working electrode connecting hole in this embodiment has a diameter of 10cm.

[0032] In this embodiment, the two working electrodes are the same 40mm×40mm×3mm aluminum alloy, and the reference electrode is a saturated calomel electrode.

[0033] The electrolyte in this embodiment is a 3.5% sodium chloride solution.

[0034] The electrochemical workstation used in this embodiment is model CHI604D. Example

[0035] For linear polarization scan testing, the electrochemical testing apparatus described in Example 1 can be operated using the following steps: The first step is to place the working electrode in the working electrode connecting hole 5, and then tighten the working electrode with the clamping bolt 10 to ensure that it is tightly attached to the rubber ring and has good sealing performance.

[0036] The second step is to inject electrolyte solution into the electrolyte chamber 4, ensuring that the liquid level covers the working electrode connecting hole.

[0037] The third step is to remove air bubbles from the surface of the working electrode, place the cork containing the Luggin capillary into the reference electrode placement hole 6, and then insert the reference electrode into the upper end of the Luggin capillary.

[0038] Fourth step: Place the cork containing the auxiliary electrode into the auxiliary electrode placement hole 7, ensuring that the auxiliary electrode is placed parallel to the working electrode.

[0039] The fifth step is to connect the electrodes corresponding to the assembled electrochemical testing device to the electrochemical workstation and perform linear polarization scan testing.

[0040] In this embodiment, the tank 1 and the clamping plate 3 are made of acrylic, the Lugin capillary tube is made of glass, the clamping bolt 10 is made of polytetrafluoroethylene, and the adjusting bolt 11 and the adjusting nut 12 are made of stainless steel.

[0041] The working electrode connecting hole in this embodiment has a diameter of 10cm.

[0042] In this embodiment, the two working electrodes are the same 40mm×40mm×3mm aluminum alloy, and the reference electrode is a saturated calomel electrode.

[0043] The electrolyte in this embodiment is a 3.5% sodium chloride solution.

[0044] The electrochemical workstation used in this embodiment is model CHI604D.

[0045] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

[0046] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0047] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0048] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0049] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An electrochemical testing device suitable for a single working electrode system, characterized in that, Includes the tank body, working plate, clamping plate, working electrode connecting hole, electrolytic cell cover and slot; The tank has a rectangular electrolyte cavity in the middle, and the top of the tank has a recessed slot. The electrolytic cell cover is located inside the slot, and the electrolytic cell cover has auxiliary electrode placement holes and reference electrode placement holes. One side of the tank is connected to one end of the working plate, and the other end of the working plate is connected to the clamping plate. A clamping bolt is provided in the center of the clamping plate. The upper outer side of the working plate is provided with a groove, and the center of the working plate is provided with a working electrode connecting hole.

2. The electrochemical testing device suitable for a single working electrode system as described in claim 1, characterized in that, The upper outer side of the working plate is provided with a groove.

3. The electrochemical testing device suitable for a single working electrode system as described in claim 1, characterized in that, A gasket groove is provided on the outside of the working electrode connecting hole.

4. The electrochemical testing device suitable for a single working electrode system as described in claim 1, characterized in that, The working plate and the clamping plate are connected by four sets of adjusting bolts and adjusting nuts.

5. The electrochemical testing device suitable for a single working electrode system as described in claim 4, characterized in that, The adjusting bolt and adjusting nut are made of stainless steel.

6. The electrochemical testing device suitable for a single working electrode system as described in claim 1, characterized in that, The clamping bolt is made of polytetrafluoroethylene.

7. The electrochemical testing device suitable for a single working electrode system as described in claim 1, characterized in that, The groove and the clamping plate are made of acrylic.

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