Visual salt mist testing device
By introducing ultraviolet lamps and photoluminescent agents into the salt spray test device, the problem of difficult to observe the corrosion marks of salt spray penetrated into the battery box is solved, and efficient and accurate corrosion detection is achieved.
Patent Information
- Application Number
- CN202510631998.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-01
AI Technical Summary
The existing salt spray testing device cannot directly observe the corrosion traces of trace salt spray penetrate into the inside of the battery box, resulting in low detection efficiency and high cost.
A visual salt spray test device is used to stimulate the fluorescence effect of quantum dots using ultraviolet lights, and corrosion marks are displayed in the salt spray with photoluminescent agents. The corrosion of the metal parts surface is directly observed through the observation window.
It significantly improves detection efficiency and accuracy, simplifies the inspection process, and reduces equipment and operation costs.
Smart Images
Figure CN120404558A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of battery corrosion testing, and particularly to a visual salt spray test device. Background Art
[0002] In the power lithium battery industry, the surface protection performance of the battery box directly affects its weather resistance and service life, and it is necessary to verify whether it meets the protection level requirements of customers, industries or enterprises through salt spray experiments. Currently, the conventional solution is to use a salt spray testing machine for testing. This device mainly consists of components such as an AC motor, an air compressor, a feeding cup, a conical module, and a salt spray chamber. Specifically, a conical module is installed at the bottom of the feeding cup. This module includes a lower module and an upper module movably sleeved outside it. Several spray holes are provided at the apex of the lower module. After brine is injected into the feeding cup, the air compressor, driven by the AC motor, transports compressed gas through a trachea to the bottom of the conical module, causing the brine to atomize and introducing it into the salt spray chamber through the salt spray outlet at the upper part of the feeding cup to simulate a salt spray corrosion environment and evaluate the corrosion resistance of metal structural parts.
[0003] However, the prior art has significant defects: when a small amount of salt spray penetrates into the interior of the battery box seal, the corrosion caused by it cannot be directly observed with the naked eye, and it is necessary to additionally use a gas tightness detection instrument to analyze the leakage inside the tested seal after the test. This not only prolongs the test cycle but also increases the equipment investment and operation cost. Summary of the Invention
[0004] In view of the above technical problems, the present invention proposes a visual salt spray test device. The ultraviolet lamp in the observation chamber irradiates the metal part to be tested with ultraviolet light to stimulate the fluorescence effect of quantum dots, and the operator can directly observe the corrosion marks caused by the penetration of a small amount of salt spray on the surface of the metal part to be tested, significantly improving the detection efficiency and accuracy.
[0005] The technical solution adopted by the present invention is as follows: A visual salt spray test device includes an observation chamber, a guide rail, a test chamber, and a tray for carrying the metal part to be tested. One end of the guide rail is connected to the observation chamber, and the other end is connected to the test chamber. The bottom surface of the tray is slidably connected to the guide rail. A salt spray injector is provided in the test chamber, and the salt spray injected by the salt spray injector contains a photoluminescent agent. An ultraviolet lamp is installed in the observation chamber, and the observation chamber is provided with an observation window.
[0006] Optionally, the test chamber is provided with a first opening for the tray to pass through, and the first opening is equipped with a first plug plate. When the first plug plate cooperates with the first opening, the inner wall of the first plug plate and the guide rail are in close contact through an elastic sealing strip.
[0007] Optionally, the observation chamber is provided with a second opening through which the tray can pass, and the second opening is equipped with a second baffle. When the second baffle cooperates with the second opening, the inner wall of the second baffle is in close contact with the guide rail through an elastic sealing strip.
[0008] Optionally, the ultraviolet lamp is fixedly installed on the inner wall of the top of the observation chamber.
[0009] Optionally, the mass concentration range of the photoluminescent agent in the salt spray is 0.05% - 1%.
[0010] Optionally, the photoluminescent agent is composed of citric acid and urea, and the mass ratio of citric acid to urea is 1:1 - 1:3.
[0011] Optionally, the observation window is made of tempered glass that can prevent ultraviolet radiation, and a storage box for eye protection covers is provided on the outer wall of the observation chamber.
[0012] Optionally, the observation window is provided on the top wall or the side wall of the observation chamber.
[0013] The beneficial effects of the present invention are as follows: The metal part to be tested is placed on the tray, the guide rail drives the tray into the test chamber, the salt spray machine sprays salt spray into the test chamber, and after spraying, the metal part to be tested enters the observation chamber along with the guide rail. The ultraviolet lamp in the observation chamber irradiates the metal part to be tested with ultraviolet light, stimulating the fluorescence effect of the quantum dots. The operator can directly observe the corrosion marks caused by the penetration of trace salt spray on the surface of the metal part to be tested, significantly improving the detection efficiency and accuracy. Description of the Drawings
[0014] Figure 1 It is a schematic structural diagram of the visual salt spray test device proposed by the embodiment of the present invention;
[0015] Figure 2 It is a schematic diagram of the observation chamber of the visual salt spray test device proposed by the embodiment of the present invention;
[0016] Figure 3 It is a top view of the visual salt spray test device proposed by the embodiment of the present invention.
[0017] The reference signs in each drawing are: 1. Observation chamber; 2. Guide rail; 3. Test chamber; 4. Tray; 5. Ultraviolet lamp; 6. Observation window; 7. Metal part to be tested. Detailed Embodiments
[0018] The following further elaborates the present application in conjunction with the drawings and embodiments.
[0019] As Figures 1 to 3As shown in the figure, this embodiment discloses a visual salt spray test device, including an observation chamber 1, a guide rail 2, a test chamber 3, and a tray 4 for carrying a metal part 7 to be tested. One end of the guide rail 2 is connected to the observation chamber 1, and the other end of the guide rail 2 is connected to the test chamber 3. The bottom surface of the tray 4 is slidably connected to the guide rail 2. A salt spray injector is provided in the test chamber 3, and the salt spray ejected by the salt spray injector contains a photoluminescent agent. An ultraviolet lamp 5 is installed in the observation chamber 1, and the observation chamber 1 is provided with an observation window 6. The metal part 7 to be tested is placed on the tray 4. The guide rail 2 drives the tray 4 into the test chamber 3. The salt spray injector sprays salt spray into the test chamber 3. After spraying, the metal part 7 to be tested enters the observation chamber 1 along with the guide rail 2. The ultraviolet lamp 5 in the observation chamber 1 irradiates the metal part 7 to be tested with ultraviolet light to stimulate the fluorescence effect of quantum dots. The operator can directly observe the corrosion marks caused by the penetration of trace salt spray on the surface of the metal part 7 to be tested, significantly improving the detection efficiency and accuracy. Among them, the salt spray injector belongs to the prior art. A sliding table is provided at the bottom of the tray 4, and the sliding table can be driven by a linear motor to slide along the guide rail 2. The number of rails can be multiple, which is the prior art.
[0020] As Figure 1 shown, the test chamber 3 is provided with a first opening for the tray 4 to pass through, and the first opening is equipped with a first plug plate. When the first plug plate cooperates with the first opening, the inner wall of the first plug plate and the guide rail 2 are in close contact through an elastic sealing strip. The elastic sealing strip dynamically seals the gap between the first opening and the guide rail 2, allowing a small amount of salt spray to leak to maintain the stable spray pressure in the chamber, while preventing excessive leakage from interfering with the test environment and ensuring that the test conditions meet the standard requirements. The observation chamber 1 is provided with a second opening for the tray 4 to pass through, and the second opening is equipped with a second plug plate. When the second plug plate cooperates with the second opening, the inner wall of the second plug plate and the guide rail 2 are in close contact through an elastic sealing strip. The detachable second plug plate and the elastic sealing strip are used to facilitate the entry and exit operation of the tray 4 while ensuring the airtightness of the observation chamber 1, preventing external light from interfering with the ultraviolet light excitation effect, and improving the clarity of fluorescence observation. Handles can be provided on the outer side walls of the first plug plate and the second plug plate, and elastic sealing strips are respectively provided on the peripheral walls of the first plug plate and the second plug plate.
[0021] As Figure 2 shown, the ultraviolet lamp 5 is fixedly installed on the top inner wall of the observation chamber 1. Installing the ultraviolet lamp 5 at the top can evenly cover the surface of the part to be tested, avoid generating shadows or blind spots caused by lateral irradiation, ensure the complete development of the fluorescence signal, and improve the recognition rate of corrosion marks.
[0022] In this embodiment, the mass concentration range of the photoluminescent agent in the salt spray is 0.05% - 1%. The components of the photoluminescent agent are citric acid and urea, and the mass ratio of citric acid to urea is 1:1 - 1:3. Carbon quantum dots generated by the pyrolysis of citric acid and urea are used as the photoluminescent agent. Its chemical inertness has high compatibility with the salt spray environment, and the fluorescence intensity is stable under a specific ratio, which can clearly mark the salt spray penetration path and enhance the detection reliability. The configuration method is as follows: (1) Configure the photoluminescent agent: Weigh a certain amount of citric acid and urea, add deionized water and mix to completely dissolve it. Heat the mixed solution in a microwave oven for a certain time, then take it out and cool it. Add a certain amount of deionized water to the pyrolyzed residue and dissolve it by ultrasonic treatment to obtain the photoluminescent agent that can be used in the present invention; (2) Configure the salt spray containing the photoluminescent agent: Configure 20 kg of a brine solution with a mass concentration of 5% and completely dissolve it; accurately measure 1000 mL of the above-mentioned synthesized fluorescent agent and mix it into the brine and completely dissolve it. The mass concentration of the fluorescent agent configured in this solution is between five ten-thousandths and one percent. Add the mixed brine solution to the salt spray tester for a conventional salt spray test. The spray rate of the salt spray test is 2, the brine temperature is 35 °C, and the pressure barrel temperature is 47 °C. The salt spray injector is set to automatically stop after continuous spraying for 120 hours, and then the guide rail 2 transports the metal part 7 to be tested into the observation box 1 and keeps it stationary for 12 h.
[0023] In this embodiment, the observation window 6 is made of tempered glass that can prevent ultraviolet radiation, and a storage box for eye protection covers is provided on the outer wall of the observation box 1. The combination of the ultraviolet-proof glass and the storage box for eye protection covers effectively blocks the radiation damage of ultraviolet light to the operator. At the same time, the tempered glass ensures the impact resistance and corrosion resistance of the observation window 6, taking into account both safety and the durability of the device. The observation window 6 is provided on the top wall or the side wall of the observation box 1.
[0024] It can be understood that the specific embodiments described above are only used to explain the relevant invention, rather than limiting the invention. In addition, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, directly or indirectly applied to other related technical fields, is similarly included in the protection scope of the present invention.
Claims
1. A visual salt spray test device, characterized in that, It includes an observation box (1), a guide rail (2), a test box (3) and a tray (4) for carrying a metal part to be tested (7). One end of the guide rail (2) is connected to the observation box (1), and the other end of the guide rail (2) is connected to the test box (3). The bottom surface of the tray (4) is slidably connected to the guide rail (2). A salt spray machine is provided in the test box (3), and the salt spray ejected by the salt spray machine contains a photoluminescent agent. An ultraviolet lamp (5) is installed in the observation box (1), and the observation box (1) is provided with an observation window (6).
2. The visualization salt spray test device according to claim 1, wherein The test box (3) is provided with a first opening for the tray (4) to pass through, and the first opening is equipped with a first plug board. When the first plug board cooperates with the first opening, the inner wall of the first plug board is in close contact with the guide rail (2) through an elastic sealing strip.
3. The visualization salt spray test device according to claim 1, characterized in that The observation box (1) is provided with a second opening for the tray (4) to pass through, and the second opening is equipped with a second plug board. When the second plug board cooperates with the second opening, the inner wall of the second plug board is in close contact with the guide rail (2) through an elastic sealing strip.
4. The visualization salt spray test device according to claim 1, characterized in that, The ultraviolet lamp (5) is fixedly installed on the inner wall of the top of the observation box (1).
5. The visualization salt spray test device according to claim 1, characterized in that, The mass concentration range of the photoluminescent agent in the salt spray is 0.05% - 1%.
6. The visualization salt spray test device according to claim 1, characterized in that, The components of the photoluminescent agent are citric acid and urea, and the mass ratio of citric acid to urea is 1:1 - 1:
3.
7. The visualization salt spray test device according to claim 1, characterized in that, The observation window (6) is made of tempered glass that can prevent ultraviolet radiation, and an eye shield storage box is provided on the outer wall of the observation box (1).
8. The visualization salt spray test device according to claim 1, characterized in that, The observation window (6) is provided on the top wall or the side wall of the observation box (1).