A honeycomb hexagonal structure wire bundle electrode

Abstract

This specification discloses a honeycomb hexagonal structure wire bundle electrode. The honeycomb hexagonal structure wire bundle electrode includes: a polyvinyl chloride (PVC) pipe shell; N test electrodes protruding from one end of the PVC pipe shell, wherein the N test electrodes form a honeycomb hexagonal structure, and the spacing between any two test electrodes is the same; N metal tubes embedded in the PVC pipe shell, wherein the N test electrodes and corresponding N connecting wires are fixedly connected within the N metal tubes, and the connecting wires are used to connect to the device under test; and cured epoxy resin, which fills the space between the N metal tubes and the PVC pipe shell, ensuring that the spacing between each electrode is strictly consistent, allowing for more accurate reconstruction of the surface corrosion of the actual material during use.

Description

Technical Field

[0001] This specification relates to the field of electrochemical testing technology, and in particular to a honeycomb hexagonal wire bundle electrode. Background Technology

[0002] Wire bundle electrode technology is a testing technique that lies between micro-area electrochemistry and macro-electrochemistry. It can detect the inhomogeneity of the electrochemical corrosion process on the surface of the test electrode. It is generally composed of a series of regularly arranged electrode wires, each wire being insulated from the others, making it suitable for the study of various localized corrosions.

[0003] Currently, the mainstream wire bundle electrode arrangement is a square electrode arrangement, which cannot guarantee the consistency of the spacing between each electrode, and to some extent affects the characterization of local corrosion.

[0004] Therefore, a honeycomb-like hexagonal wire bundle electrode is needed for more accurate characterization of localized corrosion. Summary of the Invention

[0005] This specification provides a honeycomb hexagonal wire bundle electrode to address the following technical problem: the need for a honeycomb hexagonal wire bundle electrode that provides more accurate characterization of localized corrosion.

[0006] To solve the above-mentioned technical problems, one or more embodiments of this specification are implemented as follows: A honeycomb hexagonal structure wire bundle electrode includes: a polyvinyl chloride (PVC) pipe shell; N test electrodes protruding from one end of the PVC pipe shell, wherein the N test electrodes form a honeycomb hexagonal structure, and the spacing between any two test electrodes is the same; N metal tubes built into the PVC pipe shell, wherein the N test electrodes and corresponding N connecting wires are fixedly connected inside the N metal tubes, and the connecting wires are used to connect to the device under test; and cured epoxy resin, wherein the epoxy resin fills the space between the N metal tubes and the PVC pipe shell.

[0007] The above-described at least one technical solution adopted in one or more embodiments of this specification can achieve the following beneficial effects: By providing a honeycomb hexagonal structure wire bundle electrode, comprising: a polyvinyl chloride (PVC) pipe shell; N test electrodes protruding from one end of the PVC pipe shell, wherein the N test electrodes form a honeycomb hexagonal structure, and the spacing between any two test electrodes is the same; N metal tubes built into the PVC pipe shell, wherein the N test electrodes and corresponding N connecting wires are fixedly connected inside the N metal tubes, and the connecting wires are used to connect to the device under test; and cured epoxy resin, wherein the epoxy resin fills the space between the N metal tubes and the PVC pipe shell, ensuring that the spacing between each electrode is strictly consistent, and allowing for more accurate reconstruction of the surface corrosion of the actual material during use. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure label:

[0010] 1—Test electrode; 2—Metal tube; 3—Double-layer mold; 4—Connecting wire; 5—Nut; 6—Bolt; 7—Epoxy resin; 8—PVC pipe shell.

[0011] Figure 1 This is a schematic diagram of a bottom view cross-section of a wire bundle electrode provided in an embodiment of this application;

[0012] Figure 2 This is a schematic diagram illustrating the specific fabrication of a wire bundle electrode provided in an embodiment of this application;

[0013] Figure 3a A schematic diagram of a measurement sub-region of a wire bundle electrode provided in an embodiment of this application;

[0014] Figure 3b A schematic diagram of the measuring sub-region of a wire bundle electrode provided in an embodiment of this application;

[0015] Figure 3c A schematic diagram of the galvanic potential of a measurement sub-region of a wire bundle electrode provided in an embodiment of this application;

[0016] Figure 3d A schematic diagram of the thermocouple potential of the overall measurement area of ​​a wire bundle electrode provided in an embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the electrode material ratio for a test electrode provided in an embodiment of this application. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification 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 specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0019] A honeycomb hexagonal wire bundle electrode includes:

[0020] Polyvinyl chloride (PVC) pipe outer casing;

[0021] N test electrodes protruding from one end of the polyvinyl chloride (PVC) pipe shell, wherein the N test electrodes form a honeycomb hexagonal structure, and the spacing between any two test electrodes is the same;

[0022] N metal tubes are built into the polyvinyl chloride (PVC) pipe shell. The N test electrodes and the corresponding N connecting wires are fixedly connected inside the N metal tubes. The connecting wires are used to connect to the device to be tested.

[0023] Cured epoxy resin, which fills the space between the N metal tubes and the polyvinyl chloride (PVC) pipe shell.

[0024] Indication Figure 1 Since the metal pipe is built into the PVC pipe and the connecting wires are on the other side, they are not shown.

[0025] For details, please refer to [link / reference]. Figure 2 , Figure 2 This is a schematic diagram illustrating the specific fabrication of a honeycomb-like hexagonal wire bundle electrode provided in an embodiment of this application. The specific fabrication method is as follows:

[0026] S101, N test electrodes are inserted into the corresponding N metal tubes from one end, wherein the metal tubes are fixed in a double-layer mold containing N honeycomb hexagonal holes, the hexagonal holes having upper and lower ends with different diameters, the lower end having the same diameter as the test electrode, and the upper end having the same diameter as the outer diameter of the metal tube.

[0027] S103, insert the N connecting wires from the other end into the corresponding N metal tubes, and fix them to the N test electrodes;

[0028] S105, the double-layer mold is placed into the polyvinyl chloride (PVC) pipe, and after fixing the relative position of the double-layer mold and the PVC pipe, liquid epoxy resin is injected to seal the sample.

[0029] S107, after the liquid epoxy resin has cured, the N test electrodes are exposed to obtain a geometrically symmetrical honeycomb hexagonal wire bundle electrode, wherein the spacing between any two test electrodes is the same.

[0030] Taking copper tubing as an example, the following is a more detailed description of the manufacturing process:

[0031] a. Prepare 91 aluminum-zinc alloy wires with a length of 2cm and a diameter of 0.2cm, including 73 aluminum-rich phase alloy wires (single aluminum-rich dendritic phase structure) and 18 zinc-rich phase alloy wires (single zinc-rich interdendritic phase structure), for proportioning and testing the local material distribution characteristics of the aluminum-zinc alloy plate.

[0032] Prepare 91 connecting copper tubes, with the inner diameter of the tubes matching the diameter of the electrode wires. Prepare four 50cm long 25P DuPont wires as test leads, and two fixing molds with 91 holes arranged in a honeycomb hexagonal pattern, with a spacing of 0.1cm between each hole. The diameter of each hole is divided into two sections: the lower end matches the diameter of the test electrode, and the upper end matches the outer diameter of the connecting copper tubes. Prepare three M3×20mm plastic bolts and matching nuts for connecting the two molds.

[0033] b. Pass one end of the test lead through the mold and insert it halfway into the connecting copper tube, with the copper tube on the side of the mold with the larger diameter hole. Insert the test electrode halfway into the copper tube and use a tube-type terminal crimping tool to tighten the copper tube, thereby achieving a secure connection between the single electrode and the test lead.

[0034] c. Use a digital multimeter to test the conductivity between the wire and the single electrode to ensure the continuity between each electrode and the wire.

[0035] d. Insert the 91 connected electrodes into another mold of the same size in sequence, and insert the copper tube into the larger diameter side of the mold. Use plastic bolts to fasten the two molds to prevent the position of each electrode from shifting.

[0036] e. Connect the four crimped DIDC-DB 25 male connectors to the other end of the test lead and check that the connection is secure.

[0037] f. Use a digital multimeter to test the continuity of each individual electrode to ensure that each electrode is conductive. Simultaneously, test for short circuits between adjacent electrodes.

[0038] g. Place the tightened mold into the cut PVC pipe, seal one end of the PVC pipe with sealing tape, and apply Vaseline to the pipe wall to facilitate demolding. After fixing the relative position of the mold and the PVC pipe, inject the prepared epoxy resin liquid into the PVC pipe to seal the sample.

[0039] h. After the epoxy resin dries, peel off the sealing tape at one end of the PVC pipe to expose the test electrode, and then use different grades of sandpaper to grind and polish the wire bundle electrode.

[0040] A honeycomb-like hexagonal structure wire tow electrode is provided, comprising: a polyvinyl chloride (PVC) pipe shell; N test electrodes protruding from one end of the PVC pipe shell, wherein the N test electrodes form a honeycomb-like hexagonal structure, and the spacing between any two test electrodes is the same; N metal tubes built into the PVC pipe shell, wherein the N test electrodes and corresponding N connecting wires are fixedly connected within the N metal tubes, and the connecting wires are used to connect to the device under test; and cured epoxy resin, which fills the space between the N metal tubes and the PVC pipe shell, ensuring that the spacing between each electrode is strictly consistent, and allowing for more accurate reconstruction of the surface corrosion of the actual material during use.

[0041] In one embodiment, after the wire bundle electrode is divided into six sub-regions, adjacent test electrodes in each sub-region form an equilateral triangle. This equilateral triangular sub-region can be used to test local electrochemical information, reflecting the global electrochemical information of the entire wire bundle electrode. Furthermore, due to the consistent spacing, the measured sub-region can, to some extent, represent the overall electrochemical distribution characteristics. By measuring only the electrochemical distribution information of the sub-regions, the measurement speed is improved, and the obtained local electrochemical information also ensures consistency in measurement time. Because of the consistent spacing, a single sub-region can, to some extent, represent the entire region. In previous wire bundle electrode coupling tests, there was a certain time difference between measuring the first electrode wire and the last electrode wire. Measuring only the sub-regions not only improves testing efficiency but also shortens the testing interval, bringing the entire testing process closer to the same moment, reducing testing errors, and ensuring the consistency of testing time.

[0042] like Figure 3a and Figure 3b As shown. Figure 3a The entire wire electrode bundle is divided into 6 congruent equilateral triangle sub-regions (or sector regions), and the lines connecting the test electrodes in each sub-region form the three sides of the equilateral triangle. Figure 3bThis is a schematic diagram of a sub-region, where each equilateral triangle can be used to test local electrochemical information. The spatial distribution of the local galvanic potential of the measured wire electrode is shown below. Figure 3c This illustrates that the global electrochemical information of the wire-tether electrode can be characterized based on the measured local electrochemical information. Electrochemical information can include information such as galvanic potential or current.

[0043] The specific testing process is as follows:

[0044] a. Clean the polished test surface of the wire tow electrode with alcohol and place it in the test container, ensuring that the test surface of the wire tow electrode does not come into contact with the container wall.

[0045] b. Insert the male connector of one end of the wire bundle electrode test lead into the female connector of the test equipment, and connect the reference electrode and the counter electrode to the test equipment as well.

[0046] c. Prepare the appropriate reaction solution according to the experimental requirements, and place the corrosion solution into the test container. The reaction solution needs to completely immerse the wire electrode. Place the reference electrode and the counter electrode into the test container.

[0047] d. Based on testing requirements, test the local electrochemical information of different parts of the wire electrode. Considering the consistency over time, test one-sixth of the sector ( Figure 3a and 3b This allows us to observe the galvanic corrosion between different electrodes, identify the anodic and cathodic regions, with the anodic region being the area where corrosion may have occurred and the cathodic region being the normal area.

[0048] Such as the spatial distribution of electrode potential in wire bundles ( Figure 3c In this diagram, the area corresponding to electrode number 66 is the anode region. The darker the color of the area, the greater the likelihood of corrosion. Figure 3c and Figure 3d The scale on the right side of the graph represents the electrocouple potential.

[0049] Furthermore, it can be based on, for example Figure 3c Electrochemical information measured in one sub-region is used to assign its symmetry value to the other five congruent sub-regions, thus obtaining, as shown in the figure. Figure 3d The indicated global electrochemical information.

[0050] Furthermore, when assigning electrochemical information from sub-regions to the global value, overlapping boundaries between sub-regions can be smoothed. For example, for any electrode within the boundary formed by electrodes 46-47-48-49-50-51, its corresponding value can be obtained by interpolating based on other adjacent electrodes to obtain smoothed electrochemical information values.

[0051] For example, the electrochemical information value of electrode 48 can be obtained by interpolation based on the electrochemical information values ​​of its adjacent electrodes 38, 37, 49, 59, and 58. The electrochemical information of electrode 37 can be obtained based on the information of its equivalent electrode 66, and the electrochemical information of electrode 38 can be obtained based on the information of its equivalent electrode 75. Through the aforementioned interpolation, the information of the entire wire bundle electrode can be made smoother.

[0052] In one embodiment, the test electrode is made of aluminum-zinc alloy wire, which includes aluminum-rich phase alloy wire and zinc-rich phase alloy wire, and is used to measure the local material distribution characteristics of the aluminum-zinc alloy plate.

[0053] Furthermore, the ratio of the aluminum-rich alloy wire to the zinc-rich alloy wire is 4:1, and at least one test electrode composed of an aluminum-rich alloy wire exists between any two test electrodes composed of zinc-rich alloy wires. Figure 4 As shown, Figure 4 This is a schematic diagram of the material ratio of a test electrode provided in an embodiment of this application.

[0054] The black markings indicate the test electrodes for the zinc-rich phase alloy wire, while the gray markings indicate the test electrodes for the aluminum-rich phase alloy wire. From the microstructure of the aluminum-zinc alloy coating, it exhibits a six-sector network-like two-phase structure, with an area ratio of approximately 4:1 between the aluminum-rich and zinc-rich phases. This configuration effectively reconstructs the phase interface of the aluminum-zinc alloy coating, thereby measuring the electrochemical inhomogeneity characteristics of the interphase regions. By matching the test electrode configuration to the phase interface of the material being tested, more accurate test results can be obtained.

[0055] In one embodiment, in the sub-region, seven test electrodes form a hexagon. Figure 4 For example, this division method can contain at least one test electrode of aluminum-rich alloy wire in each honeycomb-like hexagon, so that each hexagon can be used as a smaller local area to test local information in the sub-region.

[0056] In one embodiment, the N honeycomb-like hexagonal holes are spaced at the same distance, ranging from 0.1 to 0.15 cm. This method ensures that the electrodes in the fabricated wire bundle electrode maintain a reasonable distance between them, improving the accuracy of the measurement results.

[0057] In one embodiment, the metal tube is a copper tube, and the test electrode is made of carbon steel, stainless steel, or aluminum alloy, thereby reducing the manufacturing cost.

[0058] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0059] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0060] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A honeycomb-like hexagonal wire bundle electrode, comprising: Polyvinyl chloride (PVC) pipe outer casing; N test electrodes protruding from one end of the polyvinyl chloride (PVC) pipe shell, wherein the N test electrodes form a honeycomb hexagonal structure, and the spacing between any two adjacent test electrodes is the same. N metal tubes are embedded in the polyvinyl chloride (PVC) pipe shell. The N test electrodes and corresponding N connecting wires are fixedly connected inside the N metal tubes. The connecting wires are used to connect to the device under test. The N test electrodes are divided into six sub-regions. The wire bundle electrode is formed by the overlapping boundaries of the six congruent sub-regions. In each sub-region, adjacent test electrodes form an equilateral triangle. The sub-region is used to test local electrochemical information, and the local electrochemical information in the sub-region is used to characterize the global electrochemical information of the wire bundle electrode. Cured epoxy resin, which fills the space between the N metal tubes and the polyvinyl chloride (PVC) pipe shell.

2. The wire-tow electrode as claimed in claim 1, wherein in the sub-region, every seven test electrodes form a regular hexagon, wherein, The regular hexagon is used to test local electrochemical information in the sub-region.

3. The wire bundle electrode as described in claim 1, wherein the test electrode is composed of aluminum-zinc alloy wire, the aluminum-zinc alloy wire including aluminum-rich phase alloy wire and zinc-rich phase alloy wire, used for proportioning and testing the local material distribution characteristics of the aluminum-zinc alloy plate.

4. The wire bundle electrode as described in claim 3, wherein the ratio of the aluminum-rich alloy wire to the zinc-rich alloy wire is 4:1, and at least one of the test electrodes composed of aluminum-rich alloy wires exists between any two test electrodes composed of zinc-rich alloy wires.

5. The wire bundle electrode as claimed in claim 1, wherein, The spacing is 0.1 to 0.15 cm.

6. The wire bundle electrode as claimed in claim 1, wherein, The metal tube is a copper tube, and the test electrode is made of carbon steel, stainless steel, or aluminum alloy.

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