Automatic reference electrode testing device

Abstract

The invention belongs to the technical field of corrosion electrochemical testing devices, and relates to a reference electrode testing device, a main body structure comprises a computer and a plurality of test grooves connected with the computer, the computer is at least provided with a control display screen, and each test groove is at least provided with a protective shell, a wiring groove, a water inlet, a water outlet, a heating device interface and a sample fixing plate. A plurality of sample fixing grooves and reference electrode fixing grooves are formed in the sample fixing plate, samples are arranged in the sample fixing grooves, sample caps are arranged in the sample fixing grooves, and the sample caps are connected with the computer through wire connecting ports formed in the sample caps and the connecting channel; automatic testing and collection recording of electrode potentials, potential stability and polarization potentials of multiple groups of reference electrode samples under the same condition can be met at the same time, specifically, a test solution can be rapidly replaced through a water inlet and a water outlet of a test tank, the temperature of the test solution can be controlled through a heating device interface, multiple groups of sample fixing tanks are arranged on a sample fixing plate, and the sample fixing plate is convenient to use. And a plurality of samples can be placed in each group of sample fixing grooves.

Description

Technical field:

[0001] The invention belongs to the technical field of corrosion electrochemical testing devices, and relates to a reference electrode testing device, which can simultaneously meet the automatic testing of multiple groups of samples under the same conditions. Background technology:

[0002] The reference electrode is an electrode used as a reference for comparison when measuring the potential of various electrodes. The electrode being measured and the reference electrode with a precisely known electrode potential form a battery. By measuring the value of the battery electromotive force, the electrode potential of the electrode being measured can be calculated. It has a wide range of applications in many technical fields such as electrochemical protection. There are different types of reference electrodes in different application environments. Commonly used reference electrodes in seawater environments include silver / silver chloride reference electrode, silver / silver halide reference electrode, copper / copper sulfate reference electrode, high-purity zinc reference electrode, etc.

[0003] In the prior art, the reference electrode test is carried out in accordance with GB / T7387-1999, and only a single reference electrode can be tested manually. However, a method for measuring electrode potential disclosed in Chinese Patent 202311222857.3 includes: determining the first potential parameter of the first reference electrode based on the calibrated potential of the second reference electrode; if the first potential parameter exceeds a preset range, initializing the first reference electrode to obtain a corrected electrode; and measuring the first electrode and the second electrode based on the corrected electrode to determine the potential parameters of the first electrode and the second electrode. Chinese Patent 202311451022.5 discloses an electrode potential measuring device, including an electrode conveying mechanism, a detection platform, a measuring mechanism and a sliding mechanism; the electrode conveying mechanism is used to drive the electrode to travel, the detection platform and the measuring mechanism are respectively located on both sides of the electrode, and the measuring mechanism is installed on the sliding mechanism and arranged toward the detection platform; the sliding mechanism is configured to drive the measuring mechanism to reciprocate along a first direction, so that the measuring mechanism can abut against the detection platform to contact the electrode and can move the measuring mechanism away from the detection platform, and the first direction is the direction in which the measuring mechanism is facing the detection platform; the measuring mechanism is configured to detect the electrode potential of the contact area of ​​the electrode when in contact with the electrode, and the measuring mechanism is also configured to simultaneously measure the electrode potential of multiple areas along the width direction of the electrode. Chinese Patent No. 201780053726.3 discloses a three-electrode system type electrode potential measuring device, which is used to measure the electrode potential of a cylindrical battery cell when the curling portion between the top cover assembly where the first electrode terminal of the cylindrical battery cell is located and the battery shell where the second electrode terminal of the cylindrical battery cell is located is separated, comprising: a working electrode connection unit connected to the first electrode terminal or the second electrode terminal, used to measure the electrode potential of the first electrode terminal or the second electrode terminal; a counter electrode connection unit connected to an electrode terminal not connected to the working electrode connection unit; a reference electrode connection unit connected to a reference electrode, used to measure The invention relates to a battery comprising: a battery circuit for measuring the electrode potential of the electrode terminal connected to the working electrode connection unit, wherein the reference electrode forms a battery circuit for measuring the electrode potential; a measuring unit connected to the working electrode connection unit, the counter electrode connection unit and the reference electrode connection unit, and used to measure the potential of the electrode connected to the working electrode connection unit; and an anti-short-circuit member located between the top cover assembly and the battery casing, wherein the curling portion between the top cover assembly and the battery casing is separated, and the anti-short-circuit member, when in contact with the top cover assembly and the battery casing, prevents a short circuit due to contact between the top cover assembly of the cylindrical battery cell and the battery casing.Chinese Patent 202211319477.7 discloses an electrode potential measuring device for an electrode piece, comprising: a stage, a reference electrode probe, a first driving unit and a second driving unit; wherein the stage is used to carry the electrode piece to be measured; the reference electrode probe is used to contact the electrode piece to be measured to measure the electrode potential of the area contacted by the reference electrode probe in the electrode piece to be measured; the first driving unit is connected to the reference electrode probe to drive the reference electrode probe to reciprocate in a direction perpendicular to the electrode piece to be measured; the second driving unit is used to drive the first driving unit or the stage to move so that the reference electrode probe covers at least part of the surface of the electrode piece to be measured ; The electrode potential measurement method of the electrode piece includes: step one, the electrode piece to be tested is placed on the stage, the electrode ear of the electrode piece to be tested is electrically connected to the positive electrode of the workstation, and the reference electrode probe is electrically connected to the negative electrode of the workstation; step two, controlling the second driving unit to drive the reference electrode probe to move in a plane parallel to the electrode piece to be tested, and controlling the first driving unit to drive the reference electrode probe to contact the surface of the electrode piece to be tested, so as to form a path to measure the electrode potential of the reference electrode probe contact area in the electrode piece to be tested; step three, repeating step two to detect the electrode potential of multiple areas of the electrode piece to be tested, and generating an electrode potential diagram of the electrode piece to be tested. The purpose is to improve the accuracy of electrode potential measurement, and it does not involve how to test the potential performance of the reference electrode itself.

[0004] With the advancement of corrosion electrochemical projects, the application fields of reference electrodes are becoming more and more extensive, and the number of reference electrodes is increasing. The quality of the reference electrodes themselves is becoming more and more concerned. Therefore, the research and development of an automatic reference electrode testing device provides technical support for the quality selection of reference electrodes, which has positive social and economic benefits. Summary of the invention:

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to develop and design an automatic reference electrode testing device to simultaneously meet the automatic testing and collection and recording of electrode potential, potential stability and polarization potential of multiple groups of reference electrode samples under the same conditions.

[0006] In order to achieve the above-mentioned object, the main structure of a reference electrode automatic testing device according to the present invention includes a computer and a plurality of test tanks connected thereto;

[0007] The computer at least has a control display screen;

[0008] The test tank shall at least have a protective shell, a wiring slot, a water inlet, a water outlet, a heating device interface and a sample fixing plate;

[0009] The sample fixing plate is provided with a plurality of sample fixing slots and reference electrode fixing slots;

[0010] The sample is placed in a sample fixing groove, which is provided with a sample cap, and is connected to a computer through a wire connection port and a connection channel provided on the sample cap.

[0011] When the reference electrode automatic testing device according to the present invention is used:

[0012] First, place the reference electrode sample in the sample fixing tank, and place the saturated calomel reference electrode in the reference electrode fixing tank;

[0013] Then, connect the computer to the sample and the saturated calomel reference electrode;

[0014] Finally, the temperature, current, number of samples, test cycle and other parameters of the test solution are set through the touch control screen 1, and the test is carried out. After the test is completed, the test results are viewed through the computer.

[0015] Compared with the prior art, the present invention can simultaneously meet the automatic testing and collection and recording of electrode potential, potential stability and polarization potential of multiple groups of reference electrode samples under the same conditions. Specifically, the test solution can be quickly replaced through the water inlet and outlet of the test tank, and the temperature of the test solution can be controlled through the heating device interface. There are multiple groups of sample fixing tanks on the sample fixing plate, and each group of sample fixing tanks can hold multiple samples. Multiple test samples and multiple test tanks are connected in series at the same time, so as to simultaneously collect the electrode potential and polarization potential of multiple reference electrode samples, and the computer can automatically collect, record and save all test result data;

[0016] It has a simple structure and a scientific and reliable principle, which improves the efficiency, accuracy and standardization of reference electrode testing and provides technical support for the quality selection of reference electrodes. Description of the drawings:

[0017] Figure 1 It is a schematic diagram of the main structural principle of the present invention.

[0018] Figure 2 The figure is a schematic diagram of the main structure of the test tank involved in the present invention.

[0019] Figure 3 It is a schematic diagram of the main structure of the sample involved in the present invention.

[0020] Figure 4 It is a schematic diagram of the main structure of the sample fixing plate involved in the present invention.

[0021] Figure 5 This is the anode polarization diagram of the silver / silver chloride reference electrode involved in Example 2 of the present invention. Specific implementation method:

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1:

[0025] The main structure of a reference electrode automatic testing device involved in this embodiment is as follows Figure 1-Figure 4 As shown, it includes a control display screen 1, a computer 2, a connecting channel 3, a test tank 4, a protective shell 5, a wiring slot 6, a water inlet 7, a water outlet 8, a heating device interface 9, a sample fixing plate 10, a sample fixing tank 11, a reference electrode fixing tank 12, a sample 13, a sample cap 14 and a wire connection port 15; the computer 2 with the control display screen 1 is connected to the three test tanks 4 through the connecting channel 3, the outer side of the test tank 4 is provided with a protective shell 5, the bottom is provided with a wiring slot 6, the test tank 4 has a water inlet 7, a water outlet 8 and a heating device interface 9, a sample fixing plate 10 is arranged on the top, eighty sample fixing slots 11 are arranged in an array on the sample fixing plate 10, five sample fixing slots 11 form a group, and the five sample fixing slots 11 form a petal shape, a reference electrode fixing slot 12 is arranged in the center of the petal, a sample 13 is arranged in the sample fixing slot 11, a sample cap 14 is arranged on the top of the sample 13, and the sample cap 14 has a wire connection port 15; wherein, the aperture of the sample fixing slot 11 is small at the top and large at the bottom, so as to facilitate the placement and fixation of the sample 13.

[0026] When the reference electrode automatic testing device involved in this embodiment is used:

[0027] First, a reference electrode is made into several samples 13, which are fixedly connected to a sample cap 14 and placed in a sample fixing groove 11, and a saturated calomel reference electrode is placed in a reference electrode fixing groove 12;

[0028] Then, the connection channel 3 is connected to the wire connection port 15 and the saturated calomel reference electrode through the wire in the wiring groove 6, so as to realize the connection between the computer 2 and the sample 13 and the saturated calomel reference electrode;

[0029] Finally, the test parameters are set and operated by touching the display screen 1. The temperature of the test solution is from room temperature to 80°C, the output current is from 1uA to 20mA, the output voltage is from -2V to 2V, the saturated calomel reference electrode is immersed in the test solution, and the test solution is heated through the heating device interface. After the test, the electrode potential and polarization potential of several samples 13 are automatically collected, recorded and saved by the computer 2.

[0030] Embodiment 2:

[0031] The reference electrode automatic testing device involved in this embodiment can simultaneously test the electrode potential, potential stability and polarization performance of multiple silver / silver chloride reference electrodes. During the test:

[0032] 20 silver / silver chloride reference electrodes are clamped as samples 13 with sample caps 14 and placed in the sample fixing groove 11. The silver rod end of each silver / silver chloride reference electrode is connected and led out with a wire. The 20 wires are connected to the connection channel 3 through the connection groove 6.

[0033] Place a saturated calomel reference electrode on the reference electrode fixing groove 12, connect it to the connecting channel 3 and immerse it in the test solution;

[0034] The temperature of the test solution is set to 25° C. by operating the display screen 1, and the immersion time of the silver / silver chloride reference electrode is set to 10 days. After 10 days, the electrode potential is tested;

[0035] After completion, the potential stability test was started with a frequency of 3 samples per day for 30 days;

[0036] After completion, anodic polarization and cathodic polarization were started. The polarization time was 8 hours and the polarization current was 10 μA. The anodic polarization potential was obtained as Figure 5 , the polarization potential is as follows:

[0037]

[0038]

[0039] The test data is stable and the test efficiency is high.

Claims

1. A reference electrode automatic testing device, characterized in that: The main structure includes a computer and several test slots connected to it; The computer at least has a control display screen; The test tank shall at least have a protective shell, a wiring slot, a water inlet, a water outlet, a heating device interface and a sample fixing plate; A plurality of sample fixing grooves and reference electrode fixing grooves are arranged on the sample fixing plate.

2. The reference electrode automatic testing device according to claim 1, characterized in that: The sample is placed in a sample fixing groove, which is provided with a sample cap, and is connected to a computer through a wire connection port and a connection channel provided on the sample cap.

3. The reference electrode automatic testing device according to claim 1 or 2, characterized in that: A computer with a control display screen is connected to three test slots through a connecting channel. A protective shell is provided on the outside of the test slot, a wiring slot is provided on the bottom, and a sample fixing plate is provided on the top of the test slot. Eighty sample fixing slots are arranged in an array on the sample fixing plate, with five sample fixing slots forming a petal shape, and a reference electrode fixing slot is provided in the center of the petals.

4. The reference electrode automatic testing device according to claim 3, characterized in that: The aperture of the sample fixing groove is smaller at the top and larger at the bottom.

5. The reference electrode automatic testing device according to claim 3, characterized in that: When using: First, place the reference electrode sample in the sample fixing tank, and place the saturated calomel reference electrode in the reference electrode fixing tank; Then, connect the computer to the sample and the saturated calomel reference electrode; Finally, set the parameters through the touch control screen and conduct the test. After completion, check the test results through the computer.

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