Electrode electric corrosion resistance detection method and device based on high-energy ignition

Abstract

The invention relates to an electrode electric corrosion resistance detection method and device based on high-energy ignition, and the method comprises the steps: improving the ignition energy of single ignition, setting the ignition frequency and ignition times, carrying out an electrode continuous ignition test under a set environmental condition, collecting electrode images before and after corrosion before and after the continuous ignition test, and processing the images. The method comprises the following steps of: binarizing and intercepting an electrode image, dividing the image into n rows, statistically analyzing the corrosion characteristics of a measured electrode, calculating to obtain the total volume V0 and V1 of the electrode before and after corrosion, and subtracting the volume of the electrode before and after corrosion to obtain the volume corrosion amount delta V so as to evaluate the electric corrosion resistance of the measured electrode. Compared with the prior art, the method has the advantage that the electric corrosion resistance of the electrode can be quickly and efficiently detected.

Description

Technical Field

[0001] The invention belongs to the technical field of electrode material and structure detection, and relates to a method and a device for detecting the electrical corrosion resistance of an electrode based on high-energy ignition. Background Art

[0002] Electrodes are key components for ensuring reliable ignition in combustion devices such as piston internal combustion engines, gas turbines and boilers. Electrodes are subjected to severe thermal shock, high explosion pressure, high voltage and high temperature during operation. In order to meet the service life requirements, electrodes must have good anti-electrolytic corrosion performance. Therefore, it is necessary to evaluate the anti-electrolytic corrosion ability of electrodes of different materials and shapes through durability tests.

[0003] At present, most electrode durability tests use conventional ignition methods, with ignition energy usually between 40-80mJ and test time up to hundreds of hours, which leads to problems such as long R&D cycle, high R&D cost and low R&D efficiency.

[0004] Patent CN116087074A discloses a method for evaluating the corrosion grade of aviation aluminum alloy in the service environment, including the following steps: conducting accelerated corrosion tests on aviation aluminum alloy specimens in different equivalent calendar years; after each equivalent calendar year of accelerated corrosion, taking photos of the corrosion damage morphology of each specimen to obtain a corrosion image of each specimen; preprocessing the corrosion image; binarizing the preprocessed corrosion image to extract the image features of the corrosion image; calculating the pitting rate of the specimen based on the image features of the corrosion image; calculating the percentage of corrosion damage; and evaluating the corrosion grade of the specimen based on the pitting rate and the percentage of corrosion damage. However, the patent uses chemical methods to corrode metals, but cannot evaluate the material's resistance to electrical corrosion; and due to different corrosion methods and different material shapes, the evaluation methods for corroded materials are also different, and the calculation methods cannot be borrowed.

[0005] Patent CN117647682A discloses a method and device for predicting the life of an electric thruster, including: measuring and obtaining the circumferential discharge gap distribution of the anode and cathode of the thruster head; connecting the circuit; taking the ignition picture of the thruster head; grayscale processing the ignition picture taken to obtain the image extreme point, and determine the image coordinates of the extreme point to determine the ignition sample; based on the ignition discharge parameters of the thruster head, based on the discharge gap, constructing the distribution density of the discharge, and determining the discharge parameter change trend within the set interval of the discharge gap; obtaining the discharge statistical sample; taking the ignition picture of the electric thruster to be predicted, and comparing it with the discharge statistical sample after processing to predict the life of the electric thruster. However, this patent is aimed at the aviation field, analyzes the ignition image, and focuses on the discharge result, but does not consider the corrosion of the electrode. Summary of the invention

[0006] The purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art, such as high cost, long time consumption and low efficiency, and to provide an electrode corrosion resistance detection method and device based on high-energy ignition. The present invention can quickly and efficiently realize the detection of electrode corrosion resistance.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] One of the technical solutions of the present invention is to provide an electrode corrosion resistance detection method based on high-energy ignition, which improves the ignition energy of a single ignition, and performs a continuous electrode ignition test under set environmental conditions by setting the ignition frequency and the number of ignitions. Before and after the continuous ignition test, electrode images before and after corrosion are collected, the images are processed, binarized and intercepted, the images are divided into n rows, the corrosion characteristics of the electrode under test are statistically analyzed, the total volume V0 and V1 of the electrode before and after corrosion are calculated, and the volume corrosion amount ΔV is obtained by subtracting the volume of the electrode before and after corrosion to evaluate the corrosion resistance of the electrode under test;

[0009] The ignition energy is 200-1200 mJ.

[0010] As a preferred technical solution, the electrode image adopts a side view.

[0011] As a preferred technical solution, the ignition energy is 500-1000 mJ.

[0012] Furthermore, the ignition frequency is 5 to 100 Hz.

[0013] As a preferred technical solution, the ignition frequency is 15 to 25 Hz.

[0014] Furthermore, the number of ignition times is 20,000 to 1,000,000.

[0015] As a preferred technical solution, the number of ignition times is 60,000 to 720,000.

[0016] As a preferred technical solution, the ignition time is 0.3 to 10 hours.

[0017] As a preferred technical solution, the ignition time is 1 to 8 hours.

[0018] As a preferred technical solution, the ambient temperature of the environmental conditions is -30 to 800°C, and the ambient pressure is 0.05 to 12 MPa.

[0019] As a preferred technical solution, the ambient temperature of the environmental conditions is 0-500° C., and the ambient pressure is 0.101-2 MPa.

[0020] Furthermore, the electrode continuous ignition test and the acquisition of electrode images before and after corrosion include the following steps:

[0021] S1.1. Determine the environmental conditions for the electrode continuous ignition test, which include ambient temperature and ambient pressure;

[0022] S1.2, set the ignition gap of the electrode;

[0023] S1.3, take an image of the electrode before corrosion;

[0024] S1.4, set the ignition energy and ignition frequency;

[0025] S1.5, ignite the electrode to be tested for a set number of ignition times;

[0026] S1.6. After ignition is completed, take a photo of the electrode under test.

[0027] Furthermore, the ignition gap is 0.5-5 mm.

[0028] As a preferred technical solution, the ignition gap is 0.8-1.2 mm.

[0029] Furthermore, processing the image includes the following steps:

[0030] S2.1, binarizing the collected image to obtain a binary electrode image;

[0031] S2.2, intercepting the binary image so that the image only contains the image of the electrode to be tested;

[0032] S2.3, measure the electrode length L;

[0033] S2.4, dividing the intercepted image of the electrode to be tested into n lines along the axial direction, and the line spacing after division is L / n;

[0034] S2.5. Statistical division of the diameter of each row of electrodes d i .

[0035] Furthermore, the row spacing L / n is 0.001-0.02 mm.

[0036] As a preferred technical solution, the row spacing L / n is 0.01-0.02 mm.

[0037] As a preferred technical solution, the diameter of the electrode before corrosion is (the diameter of each row d i The maximum value) is 0.2~5mm.

[0038] As a preferred technical solution, the diameter of the electrode before corrosion is 0.25 to 1 mm.

[0039] Further, statistically analyzing the corrosion characteristics of the electrode under test includes the following steps:

[0040] S3.1. Calculate the volume V of each row using the following formula:

[0041]

[0042] Add the volume V of each row before and after corrosion to obtain the total volume V0 and V1 before and after corrosion;

[0043] S3.2. Subtract the total volumes V0 and V1 before and after corrosion to obtain the volume corrosion amount ΔV of the electrode being tested.

[0044] One of the technical solutions of the present invention is to provide an electrode corrosion resistance detection device based on high-energy ignition, which implements the described method. The device includes a high-energy igniter, an image collector and a controller. The high-energy igniter increases the ignition energy of a single ignition, and performs a continuous electrode ignition test under set environmental conditions by setting the ignition frequency and the number of ignitions. The image collector collects electrode images before and after corrosion, and the controller processes the images and statistically analyzes the corrosion characteristics of the electrode under test.

[0045] Furthermore, the image collector includes an industrial imager, a digital camera or a high-speed camera.

[0046] One of the technical solutions of the present invention is to provide an electrode corrosion resistance detection device based on high-energy ignition, including a memory, a processor, and a computer program stored in the memory, and the processor executes the computer program to implement the steps of the described method.

[0047] One of the technical solutions of the present invention is to provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described are implemented.

[0048] One of the technical solutions of the present invention is to provide a computer program product, including a computer program, which implements the steps of the method when executed by a processor.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] (1) Increasing the ignition energy of the present invention will enhance the thermal effect of discharge, increase the surface temperature of the electrode, and thus accelerate electrode corrosion; therefore, the high-energy ignition method of the present invention can accelerate electrode corrosion in a relatively short period of time, thereby quickly screening out materials and shape combinations with good anti-electrolytic corrosion performance, which is convenient for the design and development of new electrode materials and new structures;

[0051] (2) The present invention increases the energy of a single ignition and allows the electrode to discharge multiple times at a set frequency; after the discharge, the corrosion image of the electrode is obtained, and the corrosion characteristics are analyzed by image processing technology to evaluate the anti-electrocorrosion performance of the electrode material and structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 Schematic diagram of the process of the electrode corrosion resistance detection method based on high energy ignition in an embodiment of the present invention;

[0053] Figure 2 is a schematic diagram of an electrode image before corrosion in an embodiment of the present invention;

[0054] Figure 3 This is a physical picture of an electrode image before corrosion in an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram of an electrode image after ignition is completed in Example 1 of the present invention;

[0056] Figure 5 This is a physical picture of the electrode image after ignition in Example 1 of the present invention;

[0057] Figure 6 Schematic diagram of an electrode image after ignition in Example 3 of the present invention;

[0058] Figure 7 This is a physical picture of the electrode image after ignition in Example 3 of the present invention. DETAILED DESCRIPTION

[0059] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0060] Example:

[0061] An electrode corrosion resistance detection device based on high-energy ignition includes a high-energy igniter, an image collector and a controller. The high-energy igniter increases the ignition energy of a single ignition. By setting the ignition frequency and the number of ignitions, the electrode continuous ignition test is performed under set environmental conditions. The image collector collects electrode images before and after corrosion. The controller processes the images and statistically analyzes the corrosion characteristics of the electrode under test.

[0062] The high-energy igniter uses the high-energy ignition solution of patent CN103423061A, and the image collector uses an industrial imager.

[0063] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is implemented using the above device, such as Figure 1As shown, the ignition energy of a single ignition is increased, and by setting the ignition frequency and the number of ignitions, a continuous electrode ignition test is performed under set environmental conditions. Before and after the continuous ignition test, electrode images before and after corrosion are collected, the images are processed, binarized and intercepted, and the images are divided into n rows. The corrosion characteristics of the electrode under test are statistically analyzed, and the total volume V0 and V1 of the electrode before and after corrosion are calculated. The volume corrosion amount ΔV is obtained by subtracting the volume of the electrode before and after corrosion, so as to evaluate the electro-corrosion resistance of the electrode under test.

[0064] The specific steps are as follows:

[0065] S1. Determine the environmental conditions for the electrode continuous ignition test, which include ambient temperature and ambient pressure;

[0066] S2, setting the ignition gap of the electrode;

[0067] S3, such as Figure 2 As shown, an image of the electrode before corrosion is taken (side view);

[0068] S4, setting ignition energy and ignition frequency;

[0069] S5, igniting the electrode to be tested for a set number of ignition times;

[0070] S6, such as Figure 4 and Figure 6 As shown, after the ignition is completed, the electrode under test is photographed (side view);

[0071] S7, performing binarization processing on the collected image to obtain an electrode binary image;

[0072] S8, intercepting the binary image so that the image only contains the image of the electrode to be tested;

[0073] S9, measuring electrode length L;

[0074] S10, dividing the intercepted image of the electrode to be tested into n lines along the axial direction, and the line spacing after division is L / n;

[0075] S11, the diameter of each row of electrodes after statistical division d i ;

[0076] S12. Calculate the volume V of each row. The calculation formula is as follows:

[0077]

[0078] Add the volume V of each row before and after corrosion to obtain the total volume V0 and V1 before and after corrosion;

[0079] S13, subtract the total volumes V0 and V1 before and after corrosion to obtain the volume corrosion amount ΔV of the electrode being measured.

[0080] Different embodiments are described below according to different setting parameters.

[0081] Embodiment 1:

[0082] A method for testing the electrolytic corrosion resistance of electrodes based on high-energy ignition is provided. The electrode position is fixed so that the ignition gap of the tested material of the platinum-ruthenium alloy containing 75% platinum is 1 mm. Figure 2 and Figure 3 As shown, an industrial imager was used to capture the electrode image before corrosion. Under the test conditions of ambient temperature 25°C and air pressure 101 kPa, the ignition frequency was set to 25 Hz, and a high-energy igniter was used to increase the ignition energy to 500 mJ. The electrode under test was ignited for 720,000 times (8 h).

[0083] like Figure 4 and Figure 5 As shown in the figure, after the ignition test, the electrode to be tested is photographed at the same distance using an industrial imager, and the images taken before and after the test are binarized to obtain a binary image. The binary image is intercepted so that only the electrode to be tested is included in the image. The electrode length L is measured, and the image is divided into n rows. The row spacing L / n after division is 0.016 mm. The diameter d of each row is counted. The diameter of the electrode before corrosion is (the diameter of each row d i The maximum value of the corrosion volume is 0.5 mm. The volume V of each row is calculated. The total volume V0 and V1 before and after corrosion are added respectively. Then the electrode volume corrosion volume ΔV = 0.06 mm is subtracted. 3 .

[0084] Comparative Example 1:

[0085] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is basically the same as Example 1, except that the ignition energy is 50 mJ, the number of ignitions is 18,000,000 times, the ignition time is 200 h, and the electrode volume corrosion amount ΔV=0.04 mm 3 .

[0086] Embodiment 2:

[0087] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is basically the same as Example 1, except that the electrode position is fixed so that the ignition gap of the tested material of the platinum-rhodium alloy containing 85% platinum is 0.8 mm, and under the test conditions of an ambient temperature of 500°C and a gas pressure of 2MPa, the ignition frequency is 20Hz, the ignition time is 10h, and the electrode volume corrosion amount ΔV=0.11mm is obtained. 3 .

[0088] Comparative Example 2:

[0089] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is basically the same as Example 2, except that the ignition energy is 40 mJ, the number of ignitions is 14,400,000 times, the ignition time is 200 h, and the electrode volume corrosion amount ΔV=0.08 mm 3 .

[0090] Embodiment 3:

[0091] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is basically the same as that of Example 1, except that the ignition energy is 900 mJ, the number of ignitions is 180,000 times, and the ignition time is 2 h. Figure 6 and Figure 7 As shown, the electrode volume corrosion amount ΔV = 0.2mm 3 .

[0092] Comparative Example 3:

[0093] A method for detecting the electrolytic corrosion resistance of an electrode based on high-energy ignition is basically the same as Example 3, except that the ignition energy is 30 mJ, the number of ignitions is 36,000,000 times, the ignition time is 400 h, and the electrode volume corrosion amount ΔV=0.02 mm 3 .

[0094] The high-energy ignition in the embodiment uses fewer ignition times and shorter ignition time, and can significantly increase the corrosion amount under different environmental conditions compared with the comparative example;

[0095] Compared with Embodiments 1 and 3, after increasing the ignition energy, the corrosion amount can be increased even if the ignition number and ignition time are reduced;

[0096] It can be seen that increasing the ignition energy can significantly shorten the evaluation time of electrode corrosion resistance.

[0097] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for detecting electrode corrosion resistance based on high-energy ignition, characterized in that: The method improves the ignition energy of a single ignition, and performs a continuous electrode ignition test under set environmental conditions by setting the ignition frequency and the number of ignitions. Before and after the continuous ignition test, electrode images before and after corrosion are collected, the images are processed, binarized and intercepted, the images are divided into n rows, the corrosion characteristics of the electrode under test are statistically analyzed, the total volume V0 and V1 of the electrode before and after corrosion are calculated, and the volume corrosion amount ΔV is obtained by subtracting the volume of the electrode before and after corrosion, so as to evaluate the electro-corrosion resistance of the electrode under test. The ignition energy is 200-1200 mJ.

2. The method for detecting electrode corrosion resistance based on high-energy ignition according to claim 1, characterized in that: The ignition frequency is 5 to 100 Hz.

3. The method for detecting electrode corrosion resistance based on high-energy ignition according to claim 1, characterized in that: The ignition times are 20,000 to 1,000,000.

4. The method for detecting electrode corrosion resistance based on high-energy ignition according to claim 1, characterized in that: The electrode continuous ignition test and the acquisition of electrode images before and after corrosion include the following steps: S1.

1. Determine the environmental conditions for the electrode continuous ignition test; S1.2, set the ignition gap of the electrode; S1.3, take an image of the electrode before corrosion; S1.4, set the ignition energy and ignition frequency; S1.5, ignite the electrode to be tested for a set number of ignition times; S1.

6. After ignition is completed, take a photo of the electrode under test.

5. The method for detecting electrode corrosion resistance based on high-energy ignition according to claim 4, characterized in that: The ignition gap is 0.5-5 mm.

6. The method for detecting electrode corrosion resistance based on high energy ignition according to claim 1, characterized in that: The image processing includes the following steps: S2.1, binarizing the collected image to obtain a binary electrode image; S2.2, intercepting the binary image so that the image only contains the image of the electrode to be tested; S2.3, measure the electrode length L; S2.4, dividing the intercepted image of the electrode to be tested into n lines along the axial direction, and the line spacing after division is L / n; S2.

5. Statistical division of the diameter of each row of electrodes d i .

7. The method for detecting electrode corrosion resistance based on high energy ignition according to claim 6, characterized in that: The row spacing L / n is 0.001-0.02 mm.

8. The method for detecting electrode corrosion resistance based on high energy ignition according to claim 1, characterized in that: Statistical analysis of the corrosion characteristics of the electrode under test includes the following steps: S3.

1. Calculate the volume V of each row using the following formula: Add the volume V of each row before and after corrosion to obtain the total volume V0 and V1 before and after corrosion; S3.

2. Subtract the total volumes V0 and V1 before and after corrosion to obtain the volume corrosion amount ΔV of the electrode being tested.

9. An electrode corrosion resistance detection device based on high energy ignition, characterized in that: The device implements the method as described in any one of claims 1 to 8, and the device includes a high-energy igniter, an image collector and a controller. The high-energy igniter increases the ignition energy of a single ignition, and performs a continuous electrode ignition test under set environmental conditions by setting the ignition frequency and the number of ignitions. The image collector collects electrode images before and after corrosion, and the controller processes the images and statistically analyzes the corrosion characteristics of the tested electrode.

10. The electrode corrosion resistance detection device based on high energy ignition according to claim 9, characterized in that: The image collector includes an industrial imager, a digital camera or a high-speed camera.

Images