A coating corrosion resistance detection device suitable for large equipment

Abstract

The present application relates to a kind of coating corrosion resistance detection device suitable for large equipment, including spray tank, adsorption component, monitoring component and detection liquid deployment module;Spray tank is concave shell type structure, adsorption component and spray tank are connected, adsorption component can drive the opening of spray tank and be engaged on the part to be measured to form sealed spray cavity, detection liquid deployment module is communicated with spray tank;Monitoring component is used to record the surface state of the part to be measured in spray tank;Detection liquid deployment module is equipped with stock solution tank;Detection liquid deployment module can be according to stock solution and deploy detection liquid;Spray head and drain valve are connected with detection liquid deployment module respectively.The coating corrosion resistance detection device in prior art indirectly detects the coating corrosion resistance parameter of large equipment, and the accuracy is poor, which is difficult to reflect the actual anticorrosion capacity of the coating of large equipment in actual working environment.

Description

Technical Field

[0001] This invention relates to the field of material corrosion resistance testing technology, and in particular to a device for testing the corrosion resistance of coatings suitable for large equipment. Background Technology

[0002] For large equipment operating in highly corrosive environments such as mines, salt lakes, forests, and coastal areas, the corrosion resistance of the coating on its metal components (mainly steel components, which generally account for 90% or even more than 95% of the total mass of the metal components, and most non-steel components often have relatively low requirements for the corrosion resistance of the coating) is often one of the key indicators for its quality assessment.

[0003] Existing technologies generally employ neutral salt spray testing or electrochemical testing (primarily neutral salt spray testing) to test the corrosion resistance of coatings. However, the testing equipment used in these methods is often bulky and inconvenient to move, and is generally only located in designated laboratories. Furthermore, neutral salt spray testing or electrochemical testing typically requires placing the object under test into a salt spray chamber or electrolytic cell. When testing the corrosion resistance of coatings on large equipment or its large metal components (hereinafter referred to as large equipment), existing technologies often do not directly test the large equipment on-site, involving specific chemical corrosion. Instead, methods such as neutral salt spray testing or electrochemical testing are used to first prepare test blocks simulating actual production processes. These test blocks are then placed in salt spray chambers or electrolytic cells for corrosion testing, and the corrosion resistance parameters of the coating are obtained. The corrosion resistance performance parameters of the coating on the test block can be directly used as the corrosion resistance performance index of the coating on the large equipment. Alternatively, the basic parameters of the coating on the surface of the large equipment can be detected and recorded by means of on-site film thickness detection, uniformity detection, scribing detection, corrosion potential detection, etc. Then, by comparing them with the basic parameters of the test block used in the pre-conducted salt spray test or electrochemical test, the corrosion resistance performance index of the coating on the large equipment can be estimated based on the corrosion resistance performance of the test block.

[0004] While this method is simple, the obtained coating corrosion resistance parameters (mainly corrosion resistance time) often deviate significantly from the actual corrosion resistance of coatings used in large equipment. Its accuracy is poor, and it cannot truly reflect the actual corrosion resistance of coatings on large equipment. Firstly, due to systematic differences between the experimentally prepared test blocks and the large equipment produced in production lines—such as the shape of the coated surface, stress distribution on the coated surface, pressure bearing capacity, post-coating coating distribution, coating method, and coating environment—the corrosion resistance of the test blocks often differs significantly from the actual corrosion resistance of the large equipment. Therefore, the tested coating corrosion resistance parameters have significant limitations and cannot truly reflect the corrosion resistance of coatings on actually produced large equipment.

[0005] Secondly, existing equipment used for salt spray and electrochemical experiments often simulates relatively fixed environmental conditions, limiting its ability to test the corrosion resistance of coatings under specific environments. For example, salt spray chambers, used in salt spray testing, can only simulate atmospheric corrosion by spraying salt spray for extended periods, failing to simulate environments such as immersion or water erosion. Furthermore, their testing cycles are long and difficult to change mid-test. Electrochemical testing relies on equivalent circuit fitting models and corresponding fixed electrolyte environments. These models are difficult to establish and interpret, and changing the simulated environment can lead to uninterpretable data or significant errors. This inflexibility makes it difficult to effectively reflect the actual corrosion resistance of coatings on large equipment operating under varying corrosive conditions. Consequently, testing personnel cannot accurately determine the coating's adaptability to its intended operating environment and different corrosion intensities, hindering subsequent coating optimization. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a coating corrosion resistance testing device suitable for large equipment, which solves the problem that the accuracy of the coating corrosion resistance performance parameters of large equipment obtained by the prior art through indirect detection by test blocks is poor and it is difficult to reflect the actual corrosion resistance of the coating of large equipment in the actual working environment.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0010] In a first aspect, the present invention provides a coating corrosion resistance testing device suitable for large equipment, comprising a spray tank, an adsorption component, a monitoring component, and a test liquid preparation module;

[0011] The spray tank has a concave shell structure. The adsorption component is connected to the spray tank. The adsorption component can drive the opening of the spray tank to close onto the test site to form a sealed spray chamber. The detection liquid preparation module is connected to the spray tank. The monitoring component is used to record the surface condition of the test site located in the spray tank.

[0012] The spray tank is also equipped with nozzles for delivering the test liquid into the spray tank and a drain valve;

[0013] The test solution preparation module is equipped with a stock solution tank; the test solution preparation module can prepare test solutions with different corrosive abilities based on the stock solution;

[0014] The nozzle and drain valve are respectively connected to the detection liquid preparation module.

[0015] Optionally, the spray tank includes a movable and adjustable outer shell and a stretchable inner shell;

[0016] The housing includes an input end slot unit, an output end slot unit, and several slot structure units disposed between the two; adjacent slot structure units are movably connected.

[0017] The nozzle is fixedly connected to the output end tank unit; the drain valve is fixedly connected to the output end tank unit.

[0018] Optionally, the trough structure unit is a U-shaped trough structure, including two ribs and a trough top plate disposed between the two ribs; adjacent trough structure units are rotatably connected by rotating units disposed between the ribs.

[0019] The shell of the inner shell corresponding to the adjacent trough structure unit is a stretchable flexible structure; the concave shell structure of the inner shell can be nested into the concave shell structure of the outer shell and stretches synchronously with the rotation of the trough structure unit.

[0020] Optionally, the adsorption assembly is located on the side of the rib away from the top plate of the tank; the adsorption assembly includes a strong magnet, a movable rod, and a fixed base fixedly connected to the rib; the fixed base has a movable hole; the movable rod can pass through the movable hole and move in a direction close to or away from the front of the spray tank; the strong magnet is connected to the end of the movable rod close to the front of the spray tank.

[0021] Optionally, a sealing ring is provided on the outer periphery of the housing; the front of the sealing ring is on the same plane as the front of the housing.

[0022] A sealant reinforcement layer is fixedly connected along the sealing ring and the edge of the spray tank opening; when the opening of the spray tank is engaged with the part to be tested, the sealant reinforcement layer is sealed to the part to be tested and the spray tank.

[0023] Optionally, the test solution preparation module includes a stock solution tank, a water tank, a mixing tank, an infusion pump, and a circulation tank;

[0024] The outlet of the stock solution tank, the outlet of the water tank, and the circulation outlet of the circulation tank are connected to the mixing tank via inlet valves; the input end of the infusion pump is connected to the test liquid outlet of the mixing tank; the output end of the infusion pump is connected to the nozzle; and the drain valve is connected to the circulation inlet of the circulation tank.

[0025] The mixing chamber is also equipped with a temperature control component.

[0026] Optionally, a central control unit is also included, which is used to control the detection module and the detection liquid preparation module; the air exchange valve, drain valve, infusion pump, inlet valve and temperature control components are all connected to the central control unit for communication.

[0027] Optionally, the test solution preparation module also includes a mineral box containing mineral powder; the outlet of the mineral box is connected to the inlet of the preparation box via a feeder; the preparation box is also equipped with a stirring assembly.

[0028] Optionally, the test fluid preparation module is set on a movable platform; the movable platform includes a loading platform and a carrier vehicle, with the loading platform set on top of the carrier vehicle; the carrier vehicle is equipped with casters at the bottom; and a lifting module is also provided between the loading platform and the carrier vehicle.

[0029] Optionally, the monitoring component includes a camera assembly for observing the interior of the spray tank; the camera assembly is located above the area to be measured; the spray tank is made of transparent material or has an observation window made of transparent material to facilitate the camera assembly taking pictures.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of this invention are as follows: The coating corrosion resistance testing device for large equipment of this invention, equipped with an adsorption component, a spray tank, and a test liquid preparation module, can adsorb and fix the spray tank onto a fixed point on the test area of ​​the large equipment. The corrosive test liquid in the test liquid preparation module directly tests the corrosion resistance of the surface coating of the test area of ​​the large equipment through chemical corrosion. Compared with the prior art, because this invention directly tests the corrosion resistance of the coating of the large equipment through chemical corrosion, it avoids potential deviations between the measurement of basic coating parameters and the corrosion resistance test of the test block, directly obtaining more accurate corrosion resistance parameters of the coating of the large equipment. Furthermore, the test liquid preparation module of this invention can also simulate working environments with different corrosion intensities by adjusting the corrosivity of the prepared test liquid, obtaining the corrosion resistance parameters of the coating of the large equipment under corresponding corrosion intensities, more accurately reflecting the actual corrosion resistance of the coating of the large equipment in the actual working environment.

[0032] Furthermore, the coating corrosion resistance testing device of the present invention, applicable to large equipment, is relatively flexible in its setup and has a low cost. It can simultaneously set up multiple spray tanks and test liquid preparation modules, and simultaneously simulate different environments to test multiple test parts. It accurately reflects the actual corrosion resistance of the coating in the actual working environment and its engineering adaptability to working environments with different corrosion intensities, and obtains more diverse data for subsequent optimization of coating performance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the spray tank, adsorption component, monitoring component and test liquid preparation module of the coating corrosion resistance testing device suitable for large equipment according to Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of the coating corrosion resistance testing device for large equipment according to Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the spray tank and adsorption component of the coating corrosion resistance testing device suitable for large equipment according to Embodiment 1 of the present invention;

[0036] Figure 4 This is a schematic diagram of the spray tank of the coating corrosion resistance testing device for large equipment in Embodiment 2 of the present invention when it is adsorbed on a vertical plane.

[0037] Figure 5 This is a schematic diagram of the spray tank of the coating corrosion resistance testing device for large equipment in Embodiment 2 of the present invention when it is adsorbed at a corner;

[0038] Figure 6 A schematic diagram of the detection liquid preparation module used in the coating corrosion resistance testing device for large equipment according to Embodiment 2 of the present invention;

[0039] Figure 7 For the present invention Figure 5 A magnified diagram of point G in the middle;

[0040] Figure 8 This is a schematic diagram of the spray tank of the coating corrosion resistance testing device for large equipment according to Embodiment 2 of the present invention;

[0041] Figure 9 This is a disassembly diagram of the outer shell and inner shell of the spray tank in Embodiment 2 of the present invention;

[0042] Figure 10 For the present invention Figure 8 A magnified diagram of point A in the middle;

[0043] Figure 11This is a front view of the spray tank of the coating corrosion resistance testing device for large equipment according to Embodiment 2 of the present invention;

[0044] Figure 12 For the present invention Figure 11 A magnified diagram of point B in the middle;

[0045] Figure 13 For the present invention Figure 11 A magnified view of the side view at point B in the middle;

[0046] Figure 14 This is a schematic diagram of a coating corrosion resistance testing device suitable for large equipment according to Embodiment 3 of the present invention.

[0047] [Explanation of Labels in the Attached Image]

[0048] 1: Spray tank; 2: Adsorption assembly; 3: Monitoring assembly; 4: Detection solution preparation module; 5: Central control unit; 6: Test area; 7: Spray nozzle; 8: Air exchange valve; 9: Drain valve; 10: Strong magnet; 11: Flange; 12: Second sealing layer; 13: Stock solution tank; 14: Water tank; 15: Mixing tank; 16: Infusion pump; 17: Circulation tank; 18: Temperature control assembly; 19: First inlet valve; 20: Second inlet valve; 21: Third inlet valve; 22: Stirring assembly; 23: Mineral tank; 24: Feeder; 25: Electric multi-way valve; 26: Waste Liquid tank; 27: First waste liquid valve; 28: Second waste liquid valve; 29: Outer shell; 30: Inner shell; 31: Input end tank unit; 32: Output end tank unit; 33: Tank structure unit; 34: Rib plate; 35: Tank top plate; 36: Rotating unit; 37: Flexible structure; 38: Movable rod; 39: Fixed seat; 40: Movable hole; 41: Positioning block; 42: Positioning groove; 43: Handle; 44: Sealing ring; 45: Sealing adhesive reinforcement layer; 46: Loading platform; 47: Carrier vehicle; 48: Lifting module; 49: Fixed frame; 50: Through hole. Detailed Implementation

[0049] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper," "lower," "left," "right," "front," and "rear" are used interchangeably. Figure 1 The orientation is used as a reference.

[0050] Example 1

[0051] This embodiment provides a device suitable for testing the corrosion resistance of coatings on large equipment, such as... Figure 1-2 As shown, it includes:

[0052] Detection module: Used to detect the corrosion resistance of the coating on part 6 of the large equipment under test.

[0053] Adsorption component 2: used to adsorb the detection module onto the part to be tested 6.

[0054] Monitoring component 3: Used to record the surface state of the test site 6 adsorbed by the detection module.

[0055] Detection solution preparation module 4: Used to prepare, store and provide detection solutions with specific corrosive properties to the detection module.

[0056] Central control unit 5: Used to control the detection module, monitoring component 3 and detection solution preparation module 4.

[0057] The detection module includes a spray tank 1, which is a concave shell structure with an opening on the front. When the detection module is fastened to the surface of the large equipment to be tested by the adsorption component 2, one side of the opening of the concave shell structure of the spray tank 1 can be fastened to the part to be tested 6, and the edge of its opening is in contact with the part to be tested 6, so that the spray tank 1 is sealed to form a spray chamber.

[0058] The spray tank 1 is equipped with a nozzle 7 for delivering the test liquid into the spray tank 1. The nozzle 7 can deliver the test liquid into the spray tank 1 in at least one manner, such as water flow, water curtain, water mist, and water droplets, to simulate different specialized environments.

[0059] The spray tank 1 is also equipped with an air exchange valve 8 for balancing the gas composition inside the spray chamber and a drain valve 9 for discharging the test liquid from the spray chamber.

[0060] The test solution preparation module 4 is connected to the nozzle 7 and the drain valve 9 via pipes.

[0061] Both the ventilation valve 8 and the drain valve 9 are connected to the central control terminal 5 via communication.

[0062] The adsorption component 2 is connected to the spray tank 1 in the detection module.

[0063] In this embodiment, the coating corrosion resistance testing device for large equipment is used by adsorbing the testing module onto the test part 6 of the large equipment through the adsorption component 2. The opening of the spray tank 1 is fitted with the test part 6 to form a spray chamber. Under the control of the central control terminal 5, the testing liquid preparation module 4 prepares a certain amount of testing liquid with specific corrosiveness according to the design requirements of the central control terminal 5. Then, the testing liquid is transported to the spray chamber through the pipeline and the nozzle 7. The testing liquid is used to chemically corrode the coating to test the corrosion resistance of the coating. Excess testing liquid in the spray chamber is automatically discharged (naturally discharged under gravity) or forcibly discharged (discharged by the water pump in the drain valve 9) under the control of the central control terminal 5.

[0064] This embodiment of the coating corrosion resistance testing device for large equipment includes an adsorption component 2, a detection module, and a detection liquid preparation module 4. The device can adsorb and fix the detection module to a fixed point on the test area 6 of the large equipment. The corrosive detection liquid in the detection liquid preparation module 4 directly tests the corrosion resistance of the surface coating of the test area 6 of the large equipment through chemical corrosion. Compared to existing technologies, this embodiment, by directly testing the corrosion resistance of the large equipment through chemical corrosion, avoids potential deviations between the measurement of basic coating parameters and the corrosion resistance test of the test piece, directly obtaining more accurate corrosion resistance parameters of the coating of the large equipment. Furthermore, the detection liquid preparation module 4 of this embodiment can directly simulate working environments with different corrosion intensities by adjusting the corrosive strength of the prepared detection liquid, obtaining the corrosion resistance parameters of the large equipment under the corresponding corrosion intensities. This not only has a simple adjustment method and low equipment cost, but also more accurately reflects the actual corrosion resistance of the coating of large equipment in actual working environments and its engineering adaptability to working environments with different corrosion intensities.

[0065] Furthermore, depending on different testing requirements, the central control unit 5 can control whether the ventilation valve 8 and the drain valve 9 are open, whether the test liquid preparation module 4 continuously supplies test liquid, and the type of liquid output from the nozzle 7. This allows for the formation of various testing modes to test the corrosion resistance of the coatings on large equipment. Testing modes include immersion testing, rinsing testing, atomization testing, and drying testing. Different testing modes can be selected according to testing needs. For example, if it is necessary to inspect the corrosion resistance of the coating of a large piece of equipment to determine whether its coating quality is qualified, the central control unit 5 can control the immersion testing mode to quickly obtain a relatively accurate corrosion resistance index of the coating on the test part 6 by immersing it in the test liquid. Simultaneously, adjusting different testing modes through the central control unit 5 can more accurately simulate the corrosive environment in actual working conditions, further improving the accuracy of the corrosion resistance of the coatings on large equipment obtained in this embodiment.

[0066] The detection modes include: 1. Immersion detection mode: Open the ventilation valve 8, close the drain valve 9, and inject the detection liquid into the spray chamber through the nozzle 7. When the spray chamber is full of detection liquid or the detection liquid reaches the predetermined water level, stop the injection of detection liquid and perform immersion corrosion detection. The ventilation valve 8 can be closed subsequently as needed.

[0067] The immersion testing mode can be used to simulate the corrosion of coatings on large equipment surfaces when exposed to water accumulation in low-lying areas or on the surface of large equipment. For example, it can be used to test the corrosion of the coating on the surface of hydraulic supports in waterlogged areas. Furthermore, because the coating at the test site 6 corrodes rapidly during immersion, the immersion testing mode allows the coating corrosion resistance testing device for large equipment in this embodiment to be used for rapid testing of coating quality. Since the immersion testing mode uses a chemical method of immersion corrosion, compared to the existing methods that indirectly obtain the corrosion resistance of the coating through basic coating parameters, the immersion testing mode provides a more accurate reflection of the corrosion resistance of the coating on large equipment.

[0068] Immersion testing has no special requirements for nozzle 7, as long as it facilitates the input of the test liquid into the spray chamber.

[0069] 2. Flushing detection mode: Open the drain valve 9 and spray the test liquid through the nozzle 7 to form a water flow that is continuously sprayed onto the part to be tested 6 in the spray chamber for rinsing corrosion detection.

[0070] The scouring detection mode is mainly used to simulate the corrosion of the surface coating of the test part 6 when it is subjected to water scouring and other conditions. For example, it simulates the corrosion of the surface coating of large equipment such as tunneling machines and coal mining machines in mining faces under the continuous water flow formed by the spray dust suppression system, the water flow formed by the water spray on the top plate of the hydraulic support, and the water flow formed by the water spray on the diesel engine casing.

[0071] To ensure the flushing power of the water flow, deluge nozzles (sprinkler nozzles) or water curtain nozzles are selected during flushing testing to create a relatively evenly dispersed water flow with a certain impact force. At the same time, using deluge nozzles or water curtain nozzles can also prevent excessive reaction force from the sprayed water from causing instability in the adsorption of the detection module.

[0072] 3. Atomization detection mode: Open the drain valve 9 to spray the test liquid through the nozzle 7 into the test part 6 in the spray chamber for atomization corrosion detection.

[0073] The atomization detection mode is mainly used to simulate the corrosion of the surface coating of the test part 6 in a humid or water mist environment, such as simulating the support equipment such as hydraulic supports affected by water mist near the spray dust suppression system, and the support and transportation equipment in the roadway with serious water seepage.

[0074] During atomization testing, a water mist nozzle is used to form a uniformly dispersed water mist to test the corrosion resistance of the part to be tested (6).

[0075] In addition, in the atomization detection mode, a fine atomizing nozzle can also be used. The temperature and composition of the detection liquid are adjusted via the mixing tank 16 to obtain a neutral sodium chloride or potassium chloride solution. Neutral salt spray testing is then performed on the test area 6 in the spray chamber to obtain relevant standard parameters for the corrosion resistance of the coating on large equipment. Because the neutral salt spray testing method using the coating corrosion resistance testing device for large equipment in this embodiment directly tests the coating performance of the test area 6 of the large equipment, without the need to prepare test blocks, it can more accurately reflect the actual corrosion resistance of the large equipment and has higher reliability.

[0076] 4. Drying detection mode: Open the ventilation valve 8 and the drain valve 9 to dry the surface of the metal plane inside the spray chamber.

[0077] By using the drying test mode in conjunction with other test modes, the corrosion of the coating by residual corrosive substances after drying can be simulated.

[0078] The testing method of the coating corrosion resistance testing device for large equipment in this embodiment allows for the selection of at least one of the following testing modes—immersion testing, rinsing testing, atomization testing, and drying testing—depending on the testing objective. Different testing modes can simulate different corrosive environments, resulting in more accurate coating corrosion resistance test results. The drying testing mode must be used alternately with other testing modes and cannot be used alone. For example, a cyclic corrosion test can be performed using a 6-hour atomization testing mode followed by an 18-hour drying testing mode to simulate alternating wet and dry environments.

[0079] Preferably, in the atomization detection mode and the flushing detection mode, the liquid formed by the detection liquid sprayed from the nozzle 7 will enter the circulation tank 18 through the drain valve 9, and then enter the mixing tank 16 for recycling.

[0080] In addition, it is important to note that when attaching the detection module to the test site 6, try to select a test site 6 that is perpendicular or inclined to the ground. If necessary, the test site 6 can be tilted or vertically adjusted by adjusting the position of the large equipment during testing. Avoid setting the detection module on a horizontal test site 6, which could prevent the drain valve 9 from draining unnecessary test liquid and cause excessive liquid accumulation in the spray chamber.

[0081] It should be noted that the method by which the adsorption component 2 adsorbs the detection module onto the test site 6 is not fixed. As long as the adsorption requirements are met, the module can be removed after the corrosion resistance test is completed, and the metal structure of the test site 6 is not damaged (e.g., high-temperature welding is not permitted). For example, it can be a strong magnet 10 or electromagnet mounted on the detection module. The magnetic attraction between the magnet 10 or electromagnet and the test site 6 presses the detection module onto the test site 6, thus completing the adsorption. Alternatively, it can be a vacuum suction cup connected to the outside of the spray tank 1 of the detection module. Negative pressure is used to adsorb the vacuum suction cup onto the test site 6, thereby pressing the detection module onto the test site 6. The adsorption component 2 can also be other adsorption methods or a combination of multiple adsorption methods.

[0082] In this embodiment, considering the testing cycle required for corrosion resistance testing, the overall energy consumption and stability of the system, the adsorption component 2 preferably includes a strong magnet 10. The strong magnet 10 is disposed inside the detection module. Specifically, the strong magnet 10 is disposed in the side wall of the opening of the concave shell structure of the spray tank 1. This ensures the strength of the attraction between the strong magnet 10 and the part to be tested 6, ensuring the adsorption effect of the detection module, while preventing the strong magnet 10 from being corroded.

[0083] Preferably, the opening of the spray tank 1 is further provided with a first sealing adhesive layer to ensure the sealing effect of the spray chamber. When the adsorption component 2 adsorbs the detection module onto the part to be tested 6 to form a spray chamber, the first sealing adhesive layer is sandwiched between the spray tank 1 and the part to be tested 6 to ensure the sealing effect of the spray chamber.

[0084] Preferred, such as Figure 3 As shown, a flange 11 is provided on the outer periphery of the spray tank 1 at the opening to increase the area of ​​the adsorption surface and improve the sealing performance of the spray chamber. The flange 11 is a layered structure arranged in a direction away from the spray tank 1, and the front surface of the flange 11 is on the same plane as the front surface of the spray tank 1. A second sealing layer 12 is also provided on the front surface of the flange 11 to further improve the sealing performance of the spray chamber. When the adsorption assembly 2 adsorbs the detection module onto the part to be tested 6 to form a spray chamber, the second sealing layer 12 is clamped between the flange 11 and the part to be tested 6 under the pressure of the strong magnet 10, further improving the sealing effect of the spray chamber.

[0085] The specific types of sealant in the first and second sealant layers 12 should be selected based on the corrosive substances in the test liquid, choosing a corrosion-resistant sealant that meets high protection requirements.

[0086] Preferably, the thickness of the first sealant layer and the second sealant layer 12 is not less than 100 micrometers to ensure the sealing effect of the sealant and prevent the sealant from being corroded and aged prematurely, which could lead to problems such as leakage during the operation of the coating corrosion resistance testing device for large equipment in this embodiment.

[0087] Preferred, such as Figure 3 As shown, the width of flange 11 is greater than the thickness of the sidewall at the opening of the concave shell structure of spray tank 1. A strong magnet 10 is disposed on the opposite side of flange 11 or inside flange 11. By placing the strong magnet 10 on the opposite side of flange 11 or inside flange 11, and utilizing the wider flange 11 to accommodate a larger adsorption surface and stronger attraction, the stability of the detection module during adsorption is ensured.

[0088] More preferably, the strong magnet 10 is disposed in the side wall of the opening of the concave shell structure of the spray tank 1 and inside the flange 11. This further improves the stability of the detection module during adsorption.

[0089] Preferred, such as Figure 2 As shown, the test solution preparation module 4 includes a stock solution tank 13 for storing a corrosive stock solution of a specific concentration, a water tank 14 for storing water, a preparation tank 15 for preparing and storing the stock solution and water to obtain a corrosive test solution, a delivery pump 16 for supplying the test solution to the spray tank 1, and a circulation tank 17 for recycling the test solution. The preparation tank 15 is also equipped with a temperature control component 18.

[0090] The outlet of the stock solution tank 13 is connected to the mixing tank 15 via a first inlet valve 19; the outlet of the water tank 14 is connected to the mixing tank 15 via a second inlet valve 20; and the circulation outlet of the circulation tank 17 is connected to the mixing tank 15 via a third inlet valve 21. The input end of the infusion pump 16 is connected to the detection liquid outlet of the mixing tank 15. The output end of the infusion pump 16 is connected to the nozzle 7 via a pipe (preferably a flexible hose). The drain valve 9 is also connected to the circulation inlet of the circulation tank 17 via a pipe (preferably a flexible hose).

[0091] The infusion pump 16, the first inlet valve 19, the second inlet valve 20, the third inlet valve 21, and the temperature control component 18 are all communicatively connected to the central control unit 5. The central control unit 5 controls the composition and volume of the test solution in the mixing tank 15 by controlling the water flow rate of the multiple inlet valves, thereby controlling the corrosiveness of the test solution mixed in the mixing tank 15. The temperature of the test solution is controlled by the temperature control component 18.

[0092] Specifically, when the test solution preparation module 4 prepares the test solution, the central control unit 5, based on the corrosiveness requirements of the test solution required by the working environment of the target large equipment, controls the first inlet valve 19 and the second inlet valve 20 to input a certain amount of stock solution and water into the preparation tank 15. The stock solution is diluted to a certain concentration in the preparation tank 15 with water, ensuring its corrosiveness meets the testing requirements, thus obtaining the test solution. If it is necessary to control the temperature of the test solution to simulate different hot and cold environments, the temperature control component 18 is used for adjustment.

[0093] The prepared test solution is delivered to the spray chamber of the test module via the infusion pump 16, pipeline, and nozzle 7. Unused test solution in the spray chamber is transferred to the circulation tank 17 via the drain valve 9. If the test module is in a flushing or atomizing test mode, requiring a continuous supply of test solution from the test solution preparation module 4, the test solution in the circulation tank 17 can be transferred to the preparation tank 15 via the third inlet valve 21, and then pumped back into the spray chamber for reuse.

[0094] If necessary, the undiluted solution can be used directly as the test solution to obtain a more corrosive test solution.

[0095] The detection solution preparation module 4 in this embodiment can prepare detection solutions with the same corrosive substances but different concentrations, thus possessing different corrosive intensities, based on the original solution. It can simulate different corrosive environments according to different original solutions, and simulate the corrosion conditions of different concentrations of corrosive substances in different areas of the same environment by preparing detection solutions with different corrosive abilities. Compared with existing technologies, it better simulates real, complex corrosive environments by using detection solutions with different corrosive effects, thereby obtaining the specific corrosion resistance and adaptability of large equipment in such environments.

[0096] Preferably, the circulation tank 17 is also equipped with a filter assembly to filter out any coating debris that may fall off, so as to prevent it from clogging the nozzle 7 during the recycling of the test liquid.

[0097] Preferably, the corrosive liquid stored in the stock solution tank 13 is a saturated salt solution. More preferably, it is a saturated sodium chloride solution or a saturated potassium chloride solution. The test results obtained by using a saturated sodium chloride solution or a saturated potassium chloride solution are more in line with current relevant testing standards.

[0098] Preferred, such as Figure 2 As shown, the mixing tank 15 is also equipped with a stirring assembly 22. The stirring assembly 22 ensures that the test solution is mixed evenly. The stirring assembly 22 is communicatively connected to the central control terminal 5.

[0099] Preferred, such as Figure 2 As shown, the detection solution preparation module 4 also includes a mineral tank 23. The mineral tank 23 is connected to the preparation tank 15 via a feeder 24 and a pipeline. The feeder 24 is used to quantitatively deliver the mineral powder from the mineral tank 23 to the preparation tank 15 through the pipeline, enabling the preparation tank 15 to prepare a detection solution containing the mineral powder for simulating the underground mining environment. The feeder 24 is communicatively connected to the central control unit 5. The specific type of mineral powder is determined based on the minerals involved in the corrosion of the target large equipment being tested.

[0100] More preferably, such as Figure 2-3As shown, the detection module is equipped with two or more different types of nozzles 7. An electric multi-way valve 25 is also provided between the nozzles 7 and the infusion pump 16. The electric multi-way valve 25 is communicatively connected to the central control terminal 5, and the connection between different nozzles 7 and the infusion pump 16 is controlled by controlling the electric multi-way valve 25.

[0101] More preferably, the nozzle 7 is an adjustable nozzle, and the nozzle 7 is connected to the central control terminal 5.

[0102] Preferably, the test solution preparation module 4 also includes a waste liquid tank 26. The waste liquid outlet of the preparation tank 15 is connected to the waste liquid tank 26 via a first waste liquid valve 27. The waste liquid outlet of the circulation tank 17 is connected to the waste liquid tank 26 via a second waste liquid valve 28. Both the first waste liquid valve 27 and the second waste liquid valve 28 are communicatively connected to the central control terminal 5. Test solution with excessive circulation times and unnecessary test solution in the preparation tank 15 are discharged into the waste liquid tank 26 under the control of the central control terminal 5.

[0103] Preferred, such as Figure 2-3 As shown, the monitoring component 3 includes a camera component for observing the internal conditions of the spray tank 1. The camera component is positioned on the reverse side of the spray tank 1 or above the corresponding test area 6. The spray tank 1 is made of transparent material, or the reverse side of the spray tank 1 has an observation window made of transparent material, which facilitates the camera component to monitor and record the surface condition of the test area 6 adsorbed by the detection module through the spray tank 1.

[0104] In addition, it should be noted that in this embodiment, the spray tank 1, the air exchange valve 8, the drain valve 9, the nozzle 7, and other parts that may come into contact with the test liquid or the original liquid are all made of corrosion-resistant materials (including glass, stainless steel, fluoroplastics, etc.), which can prevent the coating corrosion resistance testing device for large equipment in this embodiment from being corroded.

[0105] Preferably, the test solution preparation module is mounted on a movable platform.

[0106] Example 2

[0107] This embodiment provides a device suitable for testing the corrosion resistance of coatings on large equipment, such as... Figure 8 As shown, compared to Embodiment 1, the difference lies in that the spray tank 1 includes an adjustable outer shell 29 and a stretchable inner shell 30. Both the outer shell 29 and the inner shell 30 are concave shell structures with openings on the front. Figure 4-5 As shown, the shape of the opening on the front of the spray tank 1 formed by the two can be controlled by adjusting the outer shell 29 of the spray tank 1, so that the spray tank 1 can be fastened to a plane with a certain curvature and height difference or fastened to two or more planes that are at a certain angle to each other and are connected to each other.

[0108] Because the surfaces of large equipment are often irregular, they may have a certain degree of curvature and height difference. For example, the outer casing of a large diesel generator itself has a certain curvature, and the surface between the casing and some connected planes may be uneven due to factors such as weld seams. There may also be certain angles between some interconnected planes. In this case, it is inconvenient to use the spray tank 1 of Example 1 for inspection. In actual use, these curved planes, the junctions between planes, and the joints are often more prone to corrosion than ordinary planes after long-term use, leading to the expansion of corrosion from point to surface, and eventually causing uncontrolled rusting, which affects the lifespan of large equipment. By fastening the spray tank 1 to a plane with a certain curvature and height difference, or to two or more planes that are at a certain angle to each other and are connected, the weak points of the coating protection can be detected. This can further obtain the corrosion resistance performance of the coating of large equipment during its actual operation, which is conducive to further optimization of the coating performance of these weak points and confirmation of maintenance time. It can also prevent corrosion from these weak points to the surface and improve the overall service life of large equipment.

[0109] Preferred, such as Figure 9-11 As shown, the outer casing 29 includes an input end slot unit 31, an output end slot unit 32, and a plurality of slot structure units 33 disposed between the two. The input end slot unit 31 and the output end slot unit 32 are respectively fixedly connected to their adjacent slot structure units 33. Adjacent slot structure units 33 are movably connected to each other.

[0110] Preferably, both the nozzle 7 and the air exchange valve 8 are fixedly connected to the input end tank unit 31. The drain valve 9 is fixedly connected to the output end tank unit 32. Figure 11 As shown, the inner shell 30, the input end slot unit 31 and the output end slot unit 32 are provided with through holes 50 at the positions of the nozzle 7, the air exchange valve 8 and the drain valve 9, for the nozzle 7, the air exchange valve 8 and the drain valve 9 to pass through.

[0111] Preferred, such as Figure 10-11 As shown, the trough structure unit 33 is a U-shaped trough structure, including two parallel ribs 34 and a trough top plate 35 disposed between the two ribs 34. The trough top plate 35 is disposed at the top of the ribs 34 and fixedly connected to them to form an L-shaped structure.

[0112] Preferred, such as Figure 9 As shown, the width of the U-shaped groove structure of the groove structure unit 33 gradually narrows along the direction close to the top plate 35 of the groove, ensuring that the groove structure unit 33 has enough room to move to meet its rotation requirements.

[0113] Preferred, such as Figure 9As shown, adjacent groove structure units 33 are rotatably connected by rotating units 36 disposed between ribs 34. More preferably, the rotating unit 36 ​​includes a hinge.

[0114] Preferred, such as Figure 8-10 As shown, both the input-end tank unit 31 and the output-end tank unit 32 are plate-shaped structures. Both are connected to two ribs 34 in their adjacent tank structure units 33. The U-shaped tank structures of several tank structure units 33 between the input-end tank unit 31 and the output-end tank unit 32 connect to form the concave shell structure of the outer shell 29. The input-end tank unit 31, the output-end tank unit 32, and the ribs 34 enclose and form the sidewalls of the concave shell structure of the outer shell 29. The bottom ends of the input-end tank unit 31 and the output-end tank unit 32, together with the bottom ends of the ribs 34, enclose and form the opening edge of the front of the concave shell structure of the outer shell 29 (i.e., the opening edge of the spray tank 1).

[0115] Preferred, such as Figure 9 As shown, the inner shell 30 is a one-piece structure. The shell portion of the inner shell 30 corresponding to the adjacent groove structure unit 33 is a stretchable flexible structure 37. The concave shell structure of the inner shell 30 can be nested into the concave shell structure of the outer shell 29 and stretches synchronously with the rotation of the groove structure unit 33.

[0116] Preferred, such as Figure 9 As shown, the shell wall of the inner shell 30 corresponding to the adjacent groove structure unit 33 has a corrugated structure, and the arrangement direction of the corrugations in the corrugated structure is the same as the arrangement direction of the groove structure unit 33.

[0117] Preferred, such as Figure 10 As shown, the adsorption assembly 2 is disposed on the side of the rib 34 away from the top plate 35 of the tank. The adsorption assembly 2 includes a strong magnet 10, a movable rod 38, and a fixed base 39 fixedly connected to the rib 34. The fixed base 39 has a movable hole 40. The movable rod 38 can pass through the movable hole 40 and move in a direction close to or away from the front of the spray tank 1. The strong magnet 10 is connected to the end of the movable rod 38 close to the front of the spray tank 1.

[0118] Preferred, such as Figure 10As shown, a positioning block 41 is also provided on the movable rod 38 along the axial direction of the movable rod 38. A positioning groove 42 is provided in the movable hole 40 of the fixed base 39 corresponding to the positioning block 41. A handle 43 is also provided on the side of the movable rod 38 away from the strong magnet 10. When the adsorption assembly 2 needs to be used, the movable rod 38 is rotated by the handle 43 to align the positioning block 41 with the positioning groove 42, and then the movable rod 38 is pressed to adsorb the strong magnet 10 onto the surface of the part to be tested 6. When the adsorption assembly 2 needs to be stopped, the movable rod 38 is pulled out in the direction away from the spray tank 1 to disengage the positioning block 41 from the positioning groove 42, and then the handle 43 is rotated to prevent the positioning block 41 from aligning with the positioning groove 42. At this time, although there is still an attraction between the strong magnet 10 and the part to be tested 6, it cannot get closer to the part to be tested 6 due to the obstruction of the positioning block 41, thus completing the separation of the adsorption assembly 2 from the part to be tested 6. This method can easily remove the spray tank 1 and avoid the spray tank 1 being difficult to remove due to the strong attraction of the strong magnet 10. At the same time, this method also enables the adsorption component 2 to adapt to the uneven surface of the test area 6, ensuring that the spray tank 1 can adsorb onto the test area 6.

[0119] Preferred, such as Figure 9 As shown, a sealing ring 44 is provided on the outer periphery of the outer casing 29. The front side of the sealing ring 44 is on the same plane as the front side of the outer casing 29. The sealing ring 44 is preferably made of rubber or flexible plastic and is fixedly connected to the rib plate 34. The sealing ring 44 can be freely bent as the outer casing 29 rotates.

[0120] Preferably, the inner shell 30 extends from the opening on the front of the outer shell 29 to the front of the sealing ring 44 and completely covers the front of the sealing ring 44. The inner shell 30 extending to the sealing ring 44 can clamp the connection between the rib 34 and the rotating unit 36, as well as the rotating unit 36, between the inner shell 30 and the sealing edge. This further improves the sealing performance of the spray chamber and prevents the solid residue of the undischarged detection liquid after drying from seeping into the connection between the rib 34 and the rotating unit 36 ​​and into the rotating unit 36, which could cause the rotating unit 36 ​​to fail to rotate or become stuck.

[0121] Preferred, such as Figure 11-13 As shown, a sealant reinforcement layer 45 is fixedly connected along the sealing ring 44 and the edge of the opening of the spray tank 1. When the opening of the spray tank 1 is engaged with the part to be tested 6, the sealant reinforcement layer 45 is sealed to the part to be tested 6 and the spray tank 1.

[0122] Example 3

[0123] This embodiment provides a device suitable for testing the corrosion resistance of coatings on large equipment, such as... Figure 4As shown, compared to Embodiment 1 or 2, the difference lies in that the detection liquid preparation module 4 is mounted on a movable platform. The movable platform includes a loading platform 46 and a carrier 47, with the loading platform 46 positioned on top of the carrier 47. The carrier 47 has casters at its bottom. A lifting module 48 is also provided between the loading platform 46 and the carrier 47. By controlling the height of the loading platform 46 through the lifting module 48, the coating corrosion resistance testing device of this embodiment, suitable for large equipment, is more adaptable to the larger size of the equipment. When the detection module is positioned at a higher position on the large equipment, by adjusting the height and position of the detection liquid preparation module 4, the height difference between the detection module and the detection liquid preparation module 4 can be kept from being too large. This avoids problems such as unstable liquid delivery by the infusion pump 16 or excessive vibration of the pipeline between the infusion pump 16 and the nozzle 7 caused by an excessive height difference, ensuring the stability of the coating corrosion resistance testing device of this embodiment suitable for large equipment during the testing process.

[0124] More preferably, the loading platform 46 is also provided with a fixing frame 49 for fixing the detection liquid preparation module 4.

[0125] More preferably, the loading platform 46 is also provided with a spray tank 1 (detection module) storage area for storing the spray tank 1 (detection module).

[0126] By setting up a movable platform, the coating corrosion resistance testing device suitable for large equipment in this embodiment can be moved more conveniently and its location can be flexibly changed.

[0127] Example 4

[0128] This embodiment provides a testing method for the coating corrosion resistance testing device suitable for large equipment as described in Embodiment 2, including the following steps:

[0129] S1: Prepare different types of stock solutions according to the testing requirements.

[0130] S2: Based on the original solution, a test solution with specific corrosion properties is prepared using the test solution preparation module 4. The test solution is then introduced into the spray chamber through the nozzle 7, allowing it to contact the test part 6 of the large equipment under test for a certain period of time, thereby testing the corrosion resistance of the coating on the surface of the test part 6.

[0131] S3: The surface condition of the test site 6 adsorbed by the detection module is monitored by monitoring component 3. The changes in corrosion on the surface of the test site 6 and the time of corrosion occurrence are recorded by the central control terminal 5. The corrosion resistance performance test results of the coating on the surface of the test site 6 are obtained.

[0132] In this embodiment, the detection method of the coating corrosion resistance testing device for large equipment can obtain test solutions with different corrosion properties based on the composition and preparation of the original solution. This allows for the simulation of corrosion intensity under different specialized corrosion environments, enabling the detection of a more realistic corrosion resistance performance of the large equipment under test under these specialized corrosion environments, thus improving the reliability of the obtained corrosion resistance results. Furthermore, the adjustment method of obtaining different test solutions with varying corrosiveness through the test solution preparation module 4 is flexible and easy to operate.

[0133] Preferably, in S1, the stock solution is a corrosive salt solution, including a standard type stock solution or a simulated type stock solution.

[0134] The standard type stock solution is a sodium chloride or potassium chloride solution, preferably a saturated sodium chloride or potassium chloride solution. It is used for standardized quality testing of the corrosion resistance of coatings on the test parts of large equipment. Because the standard type stock solution uses sodium chloride or potassium chloride as the corrosive substance, the composition of the diluted test solution is simple, and the corrosive power of sodium chloride or potassium chloride solutions at different concentrations is relatively clear. The final test results can be directly compared with existing standard test data obtained through conventional neutral salt spray testing, facilitating further inspection and analysis of coating quality and standardization of coating quality testing.

[0135] The simulated stock solution is a salt solution containing multiple components. When preparing the simulated stock solution, depending on the main corrosive substances in the simulated corrosive environment, components containing at least 1%-0.01% (the specific proportion is determined based on the actual simulation conditions) of the total mass of corrosive substances in that environment are selected. These components are then dissolved in water to prepare the simulated stock solution. For example, when simulating a mining environment, depending on the main soluble mineral types in the simulated mining environment, components containing at least 1% (the total mass of soluble minerals in that mine) of the soluble minerals are selected. These components are then dissolved in water to prepare the simulated stock solution. The simulated stock solution is preferably a saturated salt solution containing multiple saturated components. If it is necessary to simulate and test the actual corrosion resistance of large equipment in a carnallite-type potash mine, and it is known that the soluble minerals accounting for no less than 1% of the total soluble minerals in the mine include potassium halite (KCl·NaCl), carnallite (KCl·MgCl2·6H1O), magnesia hydrate (MgCl1·6H1O), halite (NaCl), and gypsum (CaSO4·2H1O), then according to the composition of these minerals, excess amounts of KCl, NaCl, MgCl1, and CaSO4 are dissolved in a certain amount of water. The resulting saturated salt solution containing four saturated components—KCl, NaCl, MgCl2, and CaSO4—is used as the original solution for simulating the mine environment of the carnallite-type potash mine.

[0136] Simulated solutions are used to test the corrosion resistance of coatings on large equipment in a specific corrosive environment, facilitating subsequent coating optimization and maintenance for that environment. They can also be used to test whether the corrosion resistance of large equipment meets the standards in that environment.

[0137] The corrosion intensity in the same environment is not constant. Taking a mining environment as an example, the corrosion intensity in certain areas, such as areas with active mineral dissolution (e.g., soluble salt enrichment zones), areas with stagnant or slow-flowing water (e.g., low-lying areas in roadways, old goafs that have not been drained), and high-temperature and high-humidity areas (e.g., mining faces and geothermal-affected areas), will be significantly higher than in areas with strong ventilation (e.g., ventilation shafts or vents), areas with low soluble mineral content, and dry or semi-dry areas (e.g., shallow roadways, old goafs that have been drained for a long time). Existing technologies using relatively single-condition detection methods often cannot accurately reflect the corrosion status of large equipment in different corrosive areas. In this embodiment, multiple sets of test solutions with different corrosion properties are prepared using the same stock solution to test the corrosion resistance of coatings on adjacent parts of the same large equipment under test or the same location of different large equipment under test. This embodiment obtains the corrosion resistance changes of large equipment in different corrosion intensities in the same environment in one go. By obtaining the specific coating corrosion conditions, it is possible to analyze the tolerance and endurance limit of the coating of large equipment to the same corrosive substance at different concentrations, which facilitates the subsequent optimization of the coating of large equipment for different corrosion intensities and subsequent maintenance.

[0138] Specifically, for example, six large pieces of equipment from a certain batch are selected as the large pieces of equipment to be tested. The corrosion resistance performance of the test parts 6 at the same location of these six large pieces of equipment is tested. Four sets of detection modules are set on the test parts 6 and adjacent positions of each large piece of equipment. The detection method of the coating corrosion resistance performance detection device applicable to large equipment in this embodiment is used to detect its coating corrosion resistance performance. Saturated sodium chloride solution is used as the stock solution. The detection solution preparation module 4 is used to prepare detection solutions with salt content (calculated by mass fraction) of 1%, 2%, 5%, 10%, 15%, and 25%, respectively, and the temperature is 35°C. Different salt concentrations of test solutions were injected into the test modules of different large-scale equipment under test. The test was conducted using only the immersion test mode. After immersion for 24 hours, it was found that the coatings of test parts 6 in all four test modules of the large-scale equipment with a test solution containing 25% salt showed severe corrosion; in the large-scale equipment with a test solution containing 15% salt, two groups of test modules showed severe corrosion, two groups showed slight corrosion, and in the large-scale equipment with a test solution containing 10% salt, one group showed slight corrosion. The remaining groups showed no corrosion. Therefore, it was concluded that the coating's corrosion resistance was sufficient to withstand immersion in a 10% sodium chloride solution for 24 hours, but coating quality-related issues were identified. After changing to a new formula and optimizing the process, to determine the corrosion resistance of another batch of large equipment using the new formula in actual use, the same testing method was used. After immersion for 24 hours, moderate corrosion was found in all test areas 6 of the large equipment with a test solution containing 25% salt, while no corrosion was found in all test areas 6 of the large equipment with a test solution containing less than 15% salt. This confirms that the coating's corrosion resistance is capable of withstanding immersion in a 15% sodium chloride solution for 24 hours, with a significant improvement in corrosion resistance and no quality issues. After testing, the coating on test areas 6 was sanded off and recoated, without affecting the normal production and use of this batch of large equipment.

[0139] Preferably, in step S2, the detection liquid also includes mineral powder. The specific type of mineral powder is determined based on the type of insoluble dust in the environment where the large equipment to be tested is used. Taking a mining environment as an example, in mining environments, some areas, such as near the mining face, will have significant dust, which the dust suppression system often cannot completely handle. The dust, after drifting out, will adhere to the coating surface of the large equipment and, under the action of the water mist released by the dust suppression system, accelerate the corrosion and wear of the large equipment. According to the type and proportion of insoluble mineral dust in the target mine, a corresponding amount of insoluble minerals are crushed and mixed into mineral micro-powder. In this embodiment, the addition of mineral powder can further simulate the environment where insoluble salt dust particles or other types of dust particles in the mine directly contact the coating of the large equipment, further improving the accuracy of the coating corrosion resistance performance results obtained by the detection method of the coating corrosion resistance performance testing device for large equipment in this embodiment, and more accurately reflecting the actual corrosion resistance of the coating of large equipment in the actual working environment.

[0140] Preferably, the detection method of the coating corrosion resistance testing device for large equipment in this embodiment further includes S4: after obtaining the test result, removing the adsorption component 2 and the detection module from the test site 6, grinding away the coating at the test site 6 detected by the detection module, and then recoating the coating. By grinding away the coating whose corrosion resistance has decreased after the corrosion resistance test and recoating with a coating that has good performance, the overall corrosion resistance of the large equipment will not be affected, and its normal use will not be affected.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the corrosion resistance of coatings on large equipment, characterized in that, It includes a spray tank (1), an adsorption component (2), a monitoring component (3), and a detection liquid preparation module (4); The spray tank (1) has a concave shell structure. The adsorption component (2) is connected to the spray tank (1). The adsorption component (2) can drive the opening of the spray tank (1) to close onto the part to be tested (6) to form a sealed spray chamber. The detection liquid preparation module (4) is connected to the spray tank (1); the monitoring component (3) is used to record the surface state of the part to be tested (6) located in the spray tank (1); The spray tank (1) is also provided with a nozzle (7) for conveying the test liquid into the spray tank (1) and a drain valve (9). The detection solution preparation module (4) is equipped with a stock solution tank (13); the detection solution preparation module (4) can prepare detection solutions with different corrosive abilities according to the stock solution; The nozzle (7) and the drain valve (9) are respectively connected to the detection liquid preparation module (4); The spray tank (1) includes an adjustable outer shell (29) and a stretchable inner shell (30). The outer casing (29) includes an input end slot unit (31), an output end slot unit (32), and a plurality of slot structure units (33) disposed between the two; adjacent slot structure units (33) are rotatably connected. The nozzle (7) is fixedly connected to the input end tank unit (31); the drain valve (9) is fixedly connected to the output end tank unit (32); The trough structure unit (33) is a U-shaped trough structure, including two ribs (34) and a trough top plate (35) disposed between the two ribs (34); adjacent trough structure units (33) are rotatably connected by rotating units (36) disposed between the ribs (34); The shell of the inner shell (30) and the adjacent groove structure unit (33) is a stretchable flexible structure (37); the concave shell structure of the inner shell (30) can be nested into the concave shell structure of the outer shell (29) and stretch synchronously with the rotation of the groove structure unit (33). The adsorption assembly (2) is disposed on the side of the rib (34) away from the top plate (35) of the tank; the adsorption assembly (2) includes a strong magnet (10), a movable rod (38) and a fixed seat (39) fixedly connected to the rib (34); the fixed seat (39) is provided with a movable hole (40); the movable rod (38) can pass through the movable hole (40) and move in a direction close to or away from the front of the spray tank (1); the strong magnet (10) is connected to one end of the movable rod (38) close to the front of the spray tank (1).

2. The coating corrosion resistance testing device for large equipment as described in claim 1, characterized in that, A sealing ring (44) is provided on the outer periphery of the outer casing (29); the front side of the sealing ring (44) is on the same plane as the front side of the outer casing (29); A sealant reinforcement layer (45) is fixedly connected along the sealing ring (44) and the opening edge of the spray tank (1); when the opening of the spray tank (1) is fastened to the part to be tested (6), the sealant reinforcement layer (45) is sealed to the part to be tested (6) and the spray tank (1).

3. The coating corrosion resistance testing device for large equipment as described in claim 2, characterized in that, The test solution preparation module (4) includes a stock solution tank (13), a water tank (14), a mixing tank (15), an infusion pump (16), and a circulation tank (17). The outlet of the stock solution tank (13), the outlet of the water tank (14), and the circulation outlet of the circulation tank (17) are respectively connected to the mixing tank (15) via inlet valves; the input end of the infusion pump (16) is connected to the detection liquid outlet of the mixing tank (15); the output end of the infusion pump (16) is connected to the nozzle (7); and the drain valve (9) is connected to the circulation inlet of the circulation tank (17). The mixing box (15) is also equipped with a temperature control component (18).

4. The coating corrosion resistance testing device for large equipment as described in claim 3, characterized in that, It also includes a central control terminal (5), which is used to control the detection module and the detection liquid preparation module (4); the air exchange valve (8), the drain valve (9), the infusion pump (16), the inlet valve and the temperature control component (18) are all connected to the central control terminal (5).

5. The coating corrosion resistance testing device for large equipment as described in claim 3 or 4, characterized in that, The detection liquid preparation module (4) also includes a mineral box (23) containing mineral powder; the outlet of the mineral box (23) is connected to the inlet of the preparation box (15) via a feeder (24); the preparation box (15) is also equipped with a stirring assembly (22).

6. The coating corrosion resistance testing device for large equipment as described in claim 1, characterized in that, The detection liquid preparation module (4) is set on a movable platform; the movable platform includes a loading platform (46) and a carrier vehicle (47), the loading platform (46) is set on the top of the carrier vehicle (47); the bottom of the carrier vehicle (47) is provided with casters; a lifting module (48) is also provided between the loading platform (46) and the carrier vehicle (47).

7. The coating corrosion resistance testing device for large equipment as described in claim 1, characterized in that, The monitoring component (3) includes a camera component for observing the internal conditions of the spray tank (1); the camera component is located above the part to be measured (6); the spray tank (1) is made of transparent material or has an observation window made of transparent material to facilitate the camera component to take pictures.

Images