A salt spray test device for simulating a salt spray environment

Abstract

The application discloses a salt fog test device simulating a salt fog environment and relates to the technical field of material analysis equipment.The salt fog test device comprises a main box body provided with an inner cavity and a top sealing water tank, a box cover, an ultrasonic salt fog generating device, an axial flow fan, an air flow distributor, an air flow guiding device, a salt fog metering device, a control device panel and the like; a side of the main box body is provided with a secondary box body, and the secondary box body is provided with the inner cavity and is communicated with the inner cavity of the main box body; a salt water tank for storing salt water is arranged on the upper end of the secondary box body; and the bottom of the ultrasonic salt fog generating device is communicated with the salt water tank through a pipeline.The application solves many problems of traditional tests through an innovative structure, optimizes salt fog distribution, ensures uniformity, accurately controls temperature and humidity, simulates more reality, introduces an ultraviolet light source and realizes accurate control of the light period, is suitable for natural environment, can comprehensively and accurately evaluate the corrosion resistance of materials, provides reliable test support for material research and application, and improves product quality and reliability.

Description

Technical Field

[0001] This invention belongs to the field of materials analysis equipment technology, and in particular relates to a salt spray test device that simulates a salt spray environment. Background Technology

[0002] Salt spray testing has long been used as an important method to simulate the corrosion of materials in a salt spray environment, and is widely applied to evaluate the corrosion resistance of materials. A traditional salt spray test chamber mainly consists of a test chamber body, a salt spray generator, and a temperature control device. Its working principle involves atomizing salt water into fine salt spray particles using the salt spray generator, spraying these particles onto the samples inside the test chamber, and simultaneously using the temperature control device to maintain a specific temperature environment within the chamber to simulate different usage scenarios.

[0003] Traditional salt spray tests primarily focus on simulating salt spray and temperature, neglecting the impact of other crucial environmental factors on material corrosion. In real-world applications, materials are not only subjected to salt spray corrosion but also to ultraviolet (UV) radiation from sunlight. UV radiation can trigger photochemical reactions on material surfaces, accelerating the corrosion process. However, traditional salt spray chambers cannot simulate the effects of UV radiation, leading to discrepancies between test results and actual conditions. This prevents a comprehensive and accurate assessment of the material's corrosion resistance in complex natural environments. Traditional salt spray chambers also have significant limitations in salt spray distribution. Due to the spraying method of the salt spray generator and gravity-fed descent, the airflow organization within the chamber is unreasonable, resulting in uneven salt spray distribution. Some areas have excessively high salt spray concentrations, while others have excessively low concentrations. This leads to significant differences in the degree of salt spray corrosion experienced by samples at different locations. Furthermore, the corrosion impact of salt spray carried by airflow on the material is not considered, failing to accurately reflect the true corrosion situation of materials in real-world applications.

[0004] To overcome the limitations of traditional salt spray testing methods, several improved techniques have emerged. For example, some test chambers improve salt spray distribution by adding fans, but this leads to significant temperature fluctuations within the chamber, making precise temperature control difficult and affecting the stability of test results. Other chambers attempt to introduce ultraviolet light sources to simulate the UV components of sunlight, but due to a lack of reasonable light cycle control and uniform light distribution design, they cannot accurately simulate the effects of day-night cycles and changes in light intensity on material corrosion in natural environments, and therefore still cannot adequately meet practical needs.

[0005] Given the numerous problems with traditional salt spray testing methods and existing improved technologies, it is necessary to design a new salt spray testing device to simulate the salt spray environment in order to more accurately and comprehensively simulate the corrosion of materials in actual use environments and improve the reliability and effectiveness of material corrosion resistance performance evaluation. Summary of the Invention

[0006] The purpose of this invention is to provide a salt spray testing device that simulates a salt spray environment. By optimizing the salt spray distribution, uniformity is ensured; temperature and humidity are precisely controlled for a more realistic simulation; and an ultraviolet light source is introduced to achieve precise control of the light cycle, conforming to the natural environment. This device can comprehensively and accurately evaluate the corrosion resistance of materials, providing reliable testing support for material research and development and application, and improving product quality and reliability.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] This invention relates to a salt spray testing device for simulating a salt spray environment. It includes a main chamber with an inner cavity and a sealed top water tank, a chamber cover, an ultrasonic salt spray generator, an axial flow fan, an airflow distributor, an airflow guide device, a salt spray metering device, and a control panel. A secondary chamber is located on one side of the main chamber, and the secondary chamber has an inner cavity that communicates with the inner cavity of the main chamber. A recessed salt water tank for storing salt water is located at the upper end of the secondary chamber. The bottom of the ultrasonic salt spray generator is connected to the salt water tank via a conduit. A heating device is installed in the secondary chamber. The control panel is mounted on the secondary chamber. A partition wall is provided between the front and rear inner walls of the main chamber, and the partition wall has an inner cavity that communicates with the inner cavity of the main chamber. The main chamber is divided into a testing area on the left and a drying area on the right. A circulation channel is provided between the lower end of the partition wall and the bottom surface of the main chamber. The area below the partition wall is filled with filtered water during the test. The filtered water, which is deionized water or other non-volatile liquids that do not interfere with the sample, filters the salt spray. Excess filtered water will be discharged from the overflow drain pipe. During the test, the valve on it will be opened periodically to drain the water.

[0009] The test area includes a temperature sensor, a humidity sensor, a sample stage, a sample support rod, and the salt spray metering device. The heating device, temperature sensor, and humidity sensor are connected to the temperature control component and the temperature control assembly in the control device panel via high-temperature and corrosion-resistant wires. There are three sample stages, which can be used individually to support samples, or in groups to support samples. The sample stages can also be combined with the sample support rod to place the samples at large angles.

[0010] The drying zone includes the ultrasonic salt spray generator, the axial flow fan, and the airflow distributor. A partition wall is installed between the partition wall and the inner right wall of the main chamber. A return pipe connected to the axial flow fan is vertically fixed through the partition wall. The axial flow fan is connected to the speed regulator assembly in the control device panel via high-temperature and corrosion-resistant wires, and the circulation speed is adjusted by controlling the power of the axial flow fan. The ultrasonic salt spray generator uses high-frequency oscillations generated by ultrasound to break water into tiny water molecule particles with a diameter of only - micrometers. Chloride ions dissolve in these small particles, which are then sprayed and transported to the test area of ​​the main chamber to form a salt spray environment. The amount of salt spray can be adjusted by the power of the oscillator. The airflow guide device is installed on the chamber cover. The main chamber, chamber cover, brine tank, and other components are all assembled and welded structures made of heat-resistant and corrosion-resistant plastic plates.

[0011] As a preferred embodiment of the present invention, the brine tank is provided with a brine tank cover plate, and the brine tank cover plate is provided with a flip cover; an ultraviolet light source is fixed through the upper end of the partition wall near the front and rear inner walls of the main box for irradiating the test area.

[0012] In a preferred embodiment of the present invention, the ultraviolet light source comprises a glass tube open at one end and a UV lamp installed inside the glass tube; the glass tube is fixed through the partition wall, and the open end of the glass tube is located in the drying area; a reflective layer is pasted on the inner wall of the upper half of the glass tube to reduce the amount of UV lamp irradiation outside the test device. High-temperature and corrosion-resistant wires of the UV lamp are connected to the light switch control component in the control device panel to control the UV lamp to turn on and off.

[0013] As a preferred embodiment of the present invention, the cover and the main body are hinged together by a hinge member; the rear wall of the main body is fixedly connected to the test area / drying area and equipped with a valve body for an overflow discharge pipe and a wastewater discharge pipe; the side wall of the main body is fixedly connected to the inner cavity of the heat transfer fluid filling pipe; the rear wall of the brine tank is fixedly connected to the brine discharge pipe equipped with a valve body for a brine discharge pipe, and the brine discharge pipe passes through the rear wall of the auxiliary body.

[0014] As a preferred embodiment of the present invention, the box cover includes a rectangular frame in the lower half; a pointed cone top is provided at the upper end of the rectangular frame; a handle is provided in the middle of the front wall of the rectangular frame; two parallel partition plates are fixed together on the front and rear inner walls of the rectangular frame and the inner wall of the pointed cone top, and when the box cover is placed on the main box, both partition plates are located directly above the partition wall; a connecting air guide pipe is fixed through the upper half of the middle of the two partition plates; a connecting salt spray pipe is fixed through the lower half of the middle of the two partition plates; a row of shaft holes is opened together on the side wall of the two partition plates and the rectangular frame in the test area, and the row of shaft holes is located between the connecting air guide pipe and the connecting salt spray pipe.

[0015] As a preferred embodiment of the present invention, the airflow guiding device includes a swaying motor, a guide plate, a synchronization plate, and a connecting rod; the swaying motor is mounted on the side wall of the partition plate located on one side of the drying zone via a motor bracket, and the output shaft of the swaying motor is coaxially arranged with one of the shaft holes; the guide plate includes a shaft that mates with the shaft hole and a pair of guide blades symmetrically fixed on the shaft, and one end of the shaft is provided with an oval plug that mates with the connecting rod and has a keyway; a row of the guide plates is installed on the box cover located on one side of the test zone. The oval plug end of the air guide plate passes through the two partition plates; the swing motor is connected to the coaxially arranged air guide plate via a coupling and key pin, and the swing motor is connected to the speed controller assembly in the control device panel via high temperature and corrosion resistant wires to control the reciprocating swing speed of the air guide plate or to fix it at a certain angle; the connecting rod and the synchronization plate are placed between the two partition plates; one end of the connecting rod is sleeved on the oval plug of the connecting rod and rotates synchronously, and the cylindrical head of the connecting rod end passes through the synchronization plate and rotates relative to it.

[0016] As a preferred embodiment of the present invention, the airflow distributor includes a main air duct connected to the upper end of the axial flow fan outlet, and the upper end of the main air duct is closed; a first air duct branch located on the upper side and a second air duct branch located on the lower side are connected to the main air duct; when the cover is closed, the first air duct branch is connected to the connecting air duct, and the second air duct branch is connected to the connecting salt spray duct; the lower half of the second air duct branch is connected to a salt spray delivery connecting pipe connected to the upper end of the ultrasonic salt spray generator; a first airflow regulating valve is provided on the first air duct branch; and a second airflow regulating valve is provided on the second air duct branch.

[0017] As a preferred embodiment of the present invention, an arc-shaped air guide plate is fixed between the lower half of the left end of the connecting air duct and the inner left wall of the rectangular frame; three pairs of V-shaped support blocks for mounting the sample stage are installed on the inner left and right walls of the test area; two pairs of U-shaped support blocks for mounting the sample support rod are installed on the inner left and right walls of the test area; the U-shaped support blocks are located above the V-shaped support blocks, and the V-shaped support blocks and the U-shaped support blocks are staggered. The sample stage has a V-shaped structure, with a row of evenly arranged small holes at its tip to prevent salt water accumulation; a row of evenly arranged semi-circular slots are opened at the upper ends of its two walls, reducing the contact area between the sample and the sample stage and accelerating the salt spray flow rate.

[0018] As a preferred embodiment of the present invention, a bottom support plate is also included; the bottom of the main box and the bottom of the auxiliary box are jointly mounted on the bottom support plate.

[0019] As a preferred embodiment of the present invention, the main housing and the secondary housing are both equipped with a heat insulation layer; the housing cover is a transparent heat-resistant and corrosion-resistant plastic sheet assembly and welding structure.

[0020] The present invention has the following beneficial effects:

[0021] This invention divides the main chamber into a test zone and a drying zone, and installs an axial flow fan and an airflow distributor, along with an airflow guiding device on the chamber cover. This effectively reduces the adhesion of salt spray on the top, and even trace amounts of salt spray can evaporate with the airflow, preventing water droplets from condensing and falling onto the sample, thus ensuring the accuracy of the test results. The airflow guiding device is designed to guide the airflow and salt spray along a predetermined path, improving the uniformity and flow rate of the salt spray within the test zone, and simulating salt spray corrosion under high-speed airflow conditions.

[0022] This invention constructs a large-scale constant-temperature water tank test environment through a main chamber, a secondary chamber, and an embedded salt water tank. Combined with airflow in a relatively closed state to promote internal circulation of the salt spray test, it helps to achieve uniformity and stability of temperature within the test chamber.

[0023] This invention simulates the accelerating corrosion effect of UV components in sunlight on materials by incorporating an ultraviolet light source. This is particularly important for evaluating the weather resistance of materials under long-term outdoor exposure, making salt spray testing more consistent with natural conditions. By simulating the impact of day-night cycles on material corrosion, the realism and reliability of the test are further improved.

[0024] The present invention, through the design of the sample stage and sample support rod, allows the sample to be supported individually or in groups, and can also be placed at large angles to simulate material corrosion under different usage scenarios.

[0025] This invention not only meets the requirements of existing national standards, but also improves the adaptability and scalability of the test method by introducing extended functions such as illumination, providing strong support for possible future standard updates or special test needs.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a salt spray test device for simulating a salt spray environment according to the present invention.

[0029] Figure 2 This is a front view of the present invention.

[0030] Figure 3 This is a partial cross-sectional view of the present invention from the front view.

[0031] Figure 4 This is the right view of the present invention.

[0032] Figure 5 This is a cross-sectional view of the present invention from the right-hand side.

[0033] Figure 6 This is a schematic diagram of the structure of the box lid when it is opened according to the present invention.

[0034] Figure 7 This is a schematic diagram of the box lid.

[0035] Figure 8 This is a schematic diagram of the airflow distributor.

[0036] Figure 9 This is a schematic diagram of the air guide plate.

[0037] Figure 10 This is a schematic diagram of the synchronization board.

[0038] Figure 11 This is a schematic diagram of the connecting rod.

[0039] Figure 12 This is a schematic diagram of the sample stage structure.

[0040] Figure 13 This is a schematic diagram of the structure of an ultraviolet light source.

[0041] Figure 14 This is a schematic diagram of the bottom support plate.

[0042] The attached diagram lists the components represented by each number as follows:

[0043] 1-Main chamber, 2-Chamber cover, 3-Ultrasonic salt spray generator, 4-Control panel, 5-Axial flow fan, 6-Airflow distributor, 7-Airflow guide device, 8-Salt spray metering device, 9-Brine tank, 10-Heating device, 11-Temperature sensor, 12-Humidity sensor, 13-Sample stage, 14-Sample support rod, 15-Ultraviolet light source, 16-Hinged component, 17-Bottom support plate, 31-Conduit, 91-Brine tank cover, 92-Flip cover, 93-Brine discharge pipe, 101-Secondary chamber, 102-Separation wall, 103-Circulation channel, 104-Separation sealing plate, 105-Return pipe 106-Overflow discharge pipe, 107-Wastewater discharge pipe, 108-Heat transfer fluid filling pipe, 151-Glass tube, 152-UV lamp tube, 153-Reflective coating, 21-Rectangular frame, 22-Conical top, 23-Handle, 24-Divider plate, 25-Connecting air duct, 26-Connecting salt spray duct, 27-Shaft hole, 28-Swing motor, 71-Swing motor, 72-Air guide plate, 73-Synchronization plate, 74-Connecting rod, 61-Main air duct, 62-First air duct branch pipe, 63-Second air duct branch pipe, 64-Salt spray delivery connecting pipe, 65-First air volume regulating valve, 66-Second air volume regulating valve. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Specific Implementation Example 1:

[0046] Please see Figure 1-6 and Figure 13 As shown, this invention is a salt spray testing device simulating a salt spray environment. The device comprises a main chamber 1 with an inner cavity and a sealed top water tank, a chamber cover 2, an ultrasonic salt spray generator 3, an axial flow fan 5, an airflow distributor 6, an airflow guide device 7, a salt spray metering device 8, a control panel 4, and an ultraviolet light source 15. All components work together to simulate a complex salt spray environment for testing the corrosion resistance of materials. The main chamber 1, chamber cover 2, salt water tank 9, and other components are all assembled and welded structures made of heat-resistant and corrosion-resistant plastic sheets.

[0047] A secondary chamber 101 is located on one side of the main chamber 1, and the secondary chamber 101 has an internal cavity that communicates with the internal cavity of the main chamber 1. A recessed brine tank 9 is located at the upper end of the secondary chamber 101 for storing brine. The brine tank 9 is equipped with a brine tank cover 91, and a flip-top 92 is mounted on the cover 91. An ultrasonic salt spray generator 3 is connected to the brine tank 9 at its bottom via a conduit 31, converting the brine into salt spray. The wires of the ultrasonic salt spray generator 3 are connected to the relevant control components in the control panel 4 of the main chamber 1. Waste liquid from the ultrasonic salt spray generator 3 is discharged through a waste liquid drain pipe at the bottom of the outer wall at the rear end of the main chamber 1. The waste liquid drain pipe (not shown in the figure) is equipped with a valve. A heating device 10 is installed in the secondary chamber 101 to regulate the test environment temperature. The temperature conditions must meet the requirements of national standards GB2423.17-2024 and GB / T 10125-2012 (e.g., 35℃±2℃). Two salt spray metering devices 8 are located on both sides of the rear end of the main chamber 1. They consist of measuring cylinders and conduits and are connected to the salt spray collector inside the main chamber 1. The control panel 4 is installed on the auxiliary chamber 101 and consists of temperature control components, humidity control components, ultrasonic oscillator power adjustment components, and periodic interrupt timer components, etc., to achieve precise control of the test environment.

[0048] A partition wall 102 is provided between the front and rear inner walls of the main chamber 1, and the partition wall 102 has an inner cavity that communicates with the inner cavity of the main chamber 1. The interior of the main chamber 1 is divided into a test area on the left and a drying area on the right. A circulation channel 103 is provided between the lower end of the partition wall 102 and the inner bottom surface of the main chamber 1. The area below the partition wall 102 is filled with filtered water during the test. The filtered water is deionized water or other non-volatile liquids that do not interfere with the sample.

[0049] The cover 2 is hinged to the main chamber 1 via a hinge member 16. An overflow drain pipe 106 and a wastewater drain pipe 107, connected to the test / drying area and equipped with valves, are fixedly connected through the rear wall of the main chamber 1. A heat transfer fluid filling pipe 108, connected to the inner cavity of the main chamber 1, is fixedly connected through one side wall. A brine drain pipe 93, equipped with a valve, is fixedly connected through the rear wall of the brine tank 9, and passes through the rear wall of the auxiliary chamber 101. Excess filtered water will be discharged from the overflow drain pipe 106; the valve on the overflow pipe 106 is opened periodically during the test for drainage.

[0050] The test area includes a temperature sensor 11, a humidity sensor 12, a sample stand 13, a sample support rod 14, and a salt spray metering device 8. The heating device 10, temperature sensor 11, and humidity sensor 12 are connected to the temperature control components on the control panel 4 via high-temperature and corrosion-resistant wires. There are three sample stands 13. Each sample stand 13 can be used individually to support a sample, or in groups to support samples. The sample stands 13 can also be combined with the sample support rod 14 to place samples at large angles to simulate different usage scenarios.

[0051] The drying zone includes an ultrasonic salt spray generator 3, an axial flow fan 5, and an airflow distributor 6. A partition wall 104 is installed between the partition wall 102 and the inner right wall of the main chamber 1. A return pipe 105, connected to the axial flow fan 5, is vertically fixed through the partition wall 104. The axial flow fan 5 is connected to the speed regulator assembly in the control panel 4 via high-temperature and corrosion-resistant wires, and the circulating air speed is adjusted by controlling the power of the axial flow fan 5. The ultrasonic salt spray generator 3 uses high-frequency oscillations generated by ultrasound to break water into tiny water molecule particles with a diameter of only 1-5 micrometers. Chloride ions dissolve in these small particles, which are then sprayed and transported into the test area of ​​the main chamber 1 to form a salt spray environment. The amount of salt spray can be adjusted by the power of the oscillator.

[0052] Among them, such as Figure 5 and Figure 12 As shown, an ultraviolet (UV) light source 15 is fixedly installed at both ends of the upper part of the partition wall 102, near the front and rear inner walls of the main housing 1, to irradiate the test area. The UV light source 15 includes a glass tube 151 with one open end and a UV lamp 152 installed inside the glass tube 151. The glass tube 151 is fixedly installed on the partition wall 102, with the open end of the glass tube 151 located in the drying area. A reflective layer 153 is attached to the inner wall of the upper half of the glass tube 151 to reduce the amount of UV lamp 152 irradiating outside the test device. The high-temperature and corrosion-resistant wires of the UV lamp 152 are connected to the light switch control component in the control panel 4, thereby controlling the UV lamp 152 to turn on and off, simulating the effect of day and night alternation on material corrosion. The UV light source 15 simulates the accelerating effect of the UV component in sunlight on material corrosion.

[0053] Among them, such as Figure 7As shown, the cover 2 includes a rectangular frame 21 in its lower half. A conical dome 22 is provided at the upper end of the rectangular frame 21. A handle 23 is provided in the middle of the front wall of the rectangular frame 21. Two parallel partition plates 24 are fixed together on the inner walls of the front and rear of the rectangular frame 21 and the inner wall of the conical dome 22. When the cover 2 is placed on the main body 1, both partition plates 24 are located directly above the partition wall 102. A connecting air duct 25 is fixed through the upper half of the middle of the two partition plates 24. A connecting salt spray duct 26 is fixed through the lower half of the middle of the two partition plates 24. A row of shaft holes 27 is opened together on the side wall of the two partition plates 24 and the rectangular frame 21 in the test area, and the row of shaft holes 27 is located between the connecting air duct 25 and the connecting salt spray duct 26.

[0054] An airflow guiding device 7 is installed on the box cover 2. For example... Figure 3 , 7 The airflow guiding device 7 shown in Figures 9-11 includes a swing motor 71, a guide plate 72, a synchronization plate 73, and a connecting rod 74. A swing motor 28 is mounted on the side wall of the partition plate 24 located on one side of the drying zone via a motor bracket, and the output shaft of the swing motor 28 is coaxially arranged with one of the shaft holes 27. The guide plate 72 includes a shaft that mates with the shaft hole 27 and a pair of guide vanes symmetrically fixed on the shaft. One end of the shaft has an oval plug that mates with the connecting rod 74 and has a keyway. A row of guide plates 72 is installed on the test zone side of the cover 2, and the oval plug ends of the guide plates 72 pass through two partition plates 24. The swing motor 28 is connected to the coaxially arranged guide plates 72 via a coupling and a key pin. The swing motor 28 is connected to the speed controller assembly in the control device panel 4 via high-temperature and corrosion-resistant wires to control the reciprocating swing rate of the guide plates 72 or to a fixed angle. The connecting rod 74 and the synchronization plate 73 are positioned between the two partition plates 24. One end of the connecting rod 74 is fitted onto the oval plug of the connecting rod 74 and rotates synchronously. The cylindrical head of the connecting rod 74 passes through the synchronous plate 73 and rotates relative to it. The swing motor 71 is connected to the air guide plate 72 through a coupling and key pin, controlling a row of air guide plates 72 to swing synchronously back and forth, guiding the airflow and salt spray to flow along a predetermined path, improving the uniformity and flow rate of the salt spray, and avoiding direct blowing onto the sample, which would affect the test results.

[0055] Among them, such as Figure 3 , 8As shown, the airflow distributor 6 includes a main air duct 61 connected to the upper end of the axial flow fan 5, and the upper end of the main air duct 61 is closed. A first air duct branch 62 located on the upper side and a second air duct branch 63 located on the lower side are connected to the main air duct 61. When the cover 2 is closed, the first air duct branch 62 is connected to the air duct 25, and the second air duct branch 63 is connected to the salt spray duct 26. The lower half of the second air duct branch 63 is connected to a salt spray delivery pipe 64 connected to the upper end of the ultrasonic salt spray generator 3. A first airflow regulating valve 65 is installed on the first air duct branch 62. A second airflow regulating valve 66 is installed on the second air duct branch 63. The first air duct branch 62 and the second air duct branch 63 are respectively used to distribute the downward airflow through the airflow guide device 7 and the flow rate of salt spray output from the ultrasonic salt spray generator 3 to the test area of ​​the main chamber 1, and the airflow is precisely controlled by the first airflow regulating valve 65 and the second airflow regulating valve 66. The airflow guiding device 7 installed on the lid 2, together with the airflow distributor 6, prevents condensation on the top of the lid 2, prevents water droplets from condensing and falling onto the sample, and ensures the accuracy of the test results.

[0056] An arc-shaped air guide plate 28 is fixed between the lower half of the left end of the connecting air duct 25 and the inner left wall of the rectangular frame 21, dispersing the airflow upwards first and then downwards to improve airflow uniformity. Three pairs of V-shaped support blocks for mounting the sample stage 13 are installed on the inner left and right walls of the test area. Two pairs of U-shaped support blocks for mounting the sample support rod 14 are also installed on the inner left and right walls of the test area. The U-shaped support blocks are located above the V-shaped support blocks, and the V-shaped and U-shaped support blocks are staggered. The sample stage 13 has a V-shaped structure with a row of evenly arranged small holes at its tip to prevent salt water accumulation. A row of evenly distributed semi-circular slots is opened at the upper ends of its two walls, reducing the contact area between the sample and the sample stage 13 and accelerating the salt spray dissipation rate.

[0057] Among them, such as Figure 1-6 As shown in Figure 14, it also includes a bottom support plate 17. The bottom of the main housing 1 and the bottom of the auxiliary housing 101 are jointly mounted on the bottom support plate 17. The bottom support plate 17 improves the overall stability of the entire test apparatus when it is moved.

[0058] In addition, to ensure temperature stability of the entire test apparatus, insulation layers are installed on the exterior of both the main chamber 1 and the auxiliary chamber 101. For easy observation of the interior of chamber 1, the cover 2 is a transparent, heat-resistant, corrosion-resistant plastic sheet assembled and welded structure.

[0059] A specific application process of this embodiment is as follows:

[0060] 1. Sample preparation and placement:

[0061] Prepare the test sample according to the test requirements, and ensure that the sample surface is clean and free of contamination.

[0062] Open the chamber lid 2 and place the sample in the test area using the sample stand 13 and sample placement rod 14. Adjust the sample angle and position as needed to ensure that the sample is fully exposed to the salt spray environment.

[0063] Close lid 2 to ensure a good seal and prevent salt spray leakage.

[0064] 2. Parameter settings:

[0065] The test temperature (e.g., 35℃±2℃) and test time can be set via the control panel 4.

[0066] The rotational speed of the axial fan 5 is set to control the airflow velocity and salt spray distribution uniformity within the test area.

[0067] Set the on and off times of the ultraviolet light source 15 to simulate the effect of day and night alternation on material corrosion (e.g., on for 1 hour, off for 2 hours).

[0068] 3. Start the equipment:

[0069] Turn on the heating device 10 to gradually raise the temperature of the test area to the set value and keep it stable.

[0070] Turn on the axial flow fan 5, and distribute the salt spray evenly to every corner of the test area through the airflow distributor 6 and the airflow guide device 7.

[0071] Start the ultrasonic salt spray generator 3 to convert the salt water into fine salt spray particles and deliver them to the test area.

[0072] Turn on the ultraviolet light source 15 as needed to simulate the accelerating effect of UV components in sunlight on material corrosion.

[0073] 4. Real-time monitoring and adjustment:

[0074] The salt spray concentration in the test area is monitored in real time by the salt spray metering device 8 to ensure that it fluctuates within the set range.

[0075] Observe the readings of temperature sensor 11 and humidity sensor 12 to ensure that the test environment meets the set requirements.

[0076] If necessary, fine-tuning can be performed via control panel 4.

[0077] Regularly check the condition of the samples in the test area and record any abnormalities (such as surface corrosion, discoloration, etc.).

[0078] 5. Stop the equipment:

[0079] After the test time is up, turn off the ultrasonic salt spray generator 3, axial flow fan 5, heating device 10 and ultraviolet light source 15 in sequence.

[0080] Open box 2 and take out the sample for further observation and analysis.

[0081] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A salt spray test device simulating a salt spray environment, characterized in that: The test device consists of a main chamber (1) with an inner cavity and a top sealed water tank, a chamber cover (2), an ultrasonic salt spray generator (3), an axial flow fan (5), an airflow distributor (6), an airflow guide device (7), a salt spray metering device (8), and a control panel (4); A secondary box (101) is provided on one side of the main box (1), and the secondary box (101) has an inner cavity that communicates with the inner cavity of the main box (1); a salt water tank (9) with a recessed bottom is provided at the upper end of the secondary box (101) for storing salt water; the bottom of the ultrasonic salt spray generator (3) is connected to the salt water tank (9) through a conduit (31). The sub-box (101) is equipped with a heating device (10); The control panel (4) is mounted on the sub-box (101); A partition wall (102) is provided between the front and rear inner walls of the main box (1), and the partition wall (102) is provided with an inner cavity and communicates with the inner cavity of the main box (1); the interior of the main box (1) is divided into a test area on the left and a drying area on the right; a circulation channel (103) is provided between the lower end of the partition wall (102) and the inner bottom surface of the main box (1). The test area includes a temperature sensor (11), a humidity sensor (12), a sample stand (13), a sample placement rod (14), and the salt spray metering device (8). The drying zone includes the ultrasonic salt spray generator (3), the axial flow fan (5), and the airflow distributor (6); a partition sealing plate (104) is provided between the partition wall (102) and the inner wall on the right side of the main housing (1); the partition sealing plate (104) is vertically fixed with a return pipe (105) connected to the axial flow fan (5). The airflow guiding device (7) is installed on the box cover (2); The airflow distributor (6) includes a main air duct (61) connected to the upper end of the axial flow fan (5), and the upper end of the main air duct (61) is closed; a first air duct branch (62) located on the upper side and a second air duct branch (63) located on the lower side are connected to the main air duct (61); when the cover (2) is closed, the first air duct branch (62) is connected to the air duct (25), and the second air duct branch (63) is connected to the salt spray duct (26); the lower half of the second air duct branch (63) is connected to a salt spray delivery connecting pipe (64) connected to the upper end of the ultrasonic salt spray generator (3); a first air volume regulating valve (65) is provided on the first air duct branch (62); a second air volume regulating valve (66) is provided on the second air duct branch (63).

2. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, The brine tank (9) is provided with a brine tank cover plate (91), and a flip cover (92) is provided on the brine tank cover plate (91); an ultraviolet light source (15) is fixed through the upper end of the partition wall (102) near the front and rear inner walls of the main box (1) to irradiate the test area.

3. The salt spray test apparatus for simulating a salt spray environment according to claim 2, characterized in that, The ultraviolet light source (15) includes a glass tube (151) with one end open and a UV lamp tube (152) installed inside the glass tube (151); the glass tube (151) is fixed through the partition wall (102) and the open end of the glass tube (151) is located in the drying area; a reflective film (153) is pasted on the inner wall of the upper half of the glass tube (151).

4. The salt spray test apparatus for simulating a salt spray environment according to claim 1 or 3, characterized in that, The cover (2) is hinged to the main body (1) by a hinge member (16); the rear wall of the main body (1) is fixed with an overflow discharge pipe (106) and a wastewater discharge pipe (107) that are connected to the test area / drying area and equipped with valves; the side wall of the main body (1) is fixed with a heat transfer fluid filling pipe (108) that is connected to its inner cavity; the rear wall of the brine tank (9) is fixed with a brine discharge pipe (93) equipped with a valve, and the brine discharge pipe (93) passes through the rear wall of the auxiliary body (101).

5. The salt spray test apparatus for simulating a salt spray environment according to claim 4, characterized in that, The box cover (2) includes a rectangular frame (21) in the lower half; a cone-shaped dome (22) is provided at the upper end of the rectangular frame (21); a handle (23) is provided in the middle of the front wall of the rectangular frame (21); two parallel partition plates (24) are fixed together on the inner walls of the front and rear of the rectangular frame (21) and the inner wall of the cone-shaped dome (22). When the box cover (2) is placed on the main box (1), the two partition plates (24) are located directly above the partition wall (102); a connecting air duct (25) is fixed through the upper half of the middle of the two partition plates (24); a connecting salt spray pipe (26) is fixed through the lower half of the middle of the two partition plates (24); a row of shaft holes (27) is opened together on the side wall of the test area of ​​the two partition plates (24) and the rectangular frame (21), and the row of shaft holes (27) is located between the connecting air duct (25) and the connecting salt spray pipe (26).

6. The salt spray test apparatus for simulating a salt spray environment according to claim 5, characterized in that, The airflow guiding device (7) includes a rocking motor (28), a guide plate (72), a synchronization plate (73), and a connecting rod (74); the rocking motor (28) is mounted on the side wall of the partition plate (24) located on one side of the drying zone via a motor bracket, and the output shaft of the rocking motor (28) is coaxially arranged with one of the shaft holes (27); the guide plate (72) includes a shaft that mates with the shaft hole (27) and a pair of guide vanes symmetrically fixed on the shaft, and one end of the shaft is provided with an oval plug that mates with the connecting rod (74) and has a keyway; A row of air guide plates (72) is installed on one side of the test area of ​​the box cover (2), and the oval plug end of the air guide plate (72) passes through the two partition plates (24); the swing motor (28) is connected to the air guide plate (72) coaxially through a coupling and a key pin; the connecting rod (74) and the synchronization plate (73) are placed between the two partition plates (24); one end of the connecting rod (74) is sleeved on the oval plug of the connecting rod (74) and rotates synchronously, and the end of the connecting rod (74) is provided with a cylindrical head that passes through the synchronization plate (73) and rotates relative to it.

7. The salt spray test apparatus for simulating a salt spray environment according to claim 6, characterized in that, An arc-shaped air guide plate is fixed between the lower half of the left end of the connecting air guide pipe (25) and the inner left wall of the rectangular frame (21); three pairs of V-shaped support blocks for installing the sample platform (13) are installed on the left and right inner walls of the test area; two pairs of U-shaped support blocks for installing the sample placement rod (14) are installed on the left and right inner walls of the test area; the U-shaped support blocks are located above the V-shaped support blocks, and the V-shaped support blocks and the U-shaped support blocks are staggered.

8. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, It also includes a bottom support plate (17); the bottom of the main box (1) and the bottom of the auxiliary box (101) are mounted together on the bottom support plate (17).

9. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, The main box (1) and the auxiliary box (101) are both equipped with a heat insulation layer; the box cover (2) is transparent.

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