Salt spray corrosion resistance testing device and method for titanium alloy fastener

Abstract

The invention relates to the technical field of corrosion resistance tests, in particular to a salt spray corrosion resistance test device and method for a titanium alloy fastener. The placing table is connected with the containing box, and the placing table is located in the inner cavity of the containing box; the at least one salt mist spray head is connected with the accommodating box, and the salt mist spray head extends into the inner cavity of the accommodating box and is arranged towards the placing table; the two flow control pipes are horizontally arranged and are symmetrical about the placement table, the flow control pipes are connected with the containing box, inner cavities of the flow control pipes communicate with an inner cavity of the containing box, and movable plugs are slidably connected into the flow control pipes; the flow control unit is used for enabling the two movable plugs to move synchronously, the flow control unit is connected with the containing box, and the flow control unit is connected with the movable plugs; the device has the effect of improving the uniformity of the contact degree between the salt mist and each part of the surface of the workpiece so as to guarantee the accuracy of a salt mist corrosion test result.

Description

Technical Field

[0001] The present application relates to the technical field of corrosion resistance testing, and in particular, to a salt spray corrosion test device and test method for titanium alloy fasteners. Background Art

[0002] Aerospace materials will face various complex and changeable environmental conditions in practical applications. Among them, the salt spray environment poses a serious threat to the metal components and coatings of the materials; chloride ions in the salt spray can penetrate and damage the protective film on the material surface, resulting in corrosion, thereby affecting the service life and safety of the equipment. Therefore, it is necessary to conduct salt spray corrosion tests on the materials to evaluate their salt spray corrosion resistance.

[0003] A salt spray corrosion test chamber is disclosed in the prior art, which includes a test chamber body. A control box is provided on one side of the test chamber body. A positioning frame is provided at the upper end of the test chamber body. A box cover plate is rotatably connected to one side of the positioning frame. A plurality of support rods are provided at the upper end of the test chamber body. A cleaning plate adapted thereto is provided inside the box cover plate. A positioning shaft is rotatably connected to the upper end of the box cover plate. The cleaning plate is provided with a positioning hole adapted to the positioning shaft. The positioning shaft passes through the positioning hole and is slidably connected to the side wall of the positioning hole. One end of the positioning shaft passes through one side of the box cover plate and extends to the outside; two "U"-shaped positioning plates are provided on one side of the upper end of the positioning frame. Two fixing shafts adapted to the positioning plates are provided on one side of the box cover plate. The two fixing shafts pass through the two positioning plates and are rotatably connected to the positioning plates.

[0004] In view of the above related technologies, after the workpiece is placed in the test chamber body, the relative position between the salt spray nozzle and the workpiece is determined and unchanged. During the subsequent salt spray corrosion test, the contact degree between the salt spray sprayed by the salt spray nozzle on the workpiece and various parts of the workpiece surface is different, thus affecting the accuracy of the salt spray corrosion test. Summary of the Invention

[0005] In order to improve the uniformity of the contact degree between the salt spray and various parts of the workpiece surface and thus ensure the accuracy of the salt spray corrosion test results, the present application provides a salt spray corrosion test device and test method for titanium alloy fasteners.

[0006] In a first aspect, the present application provides a salt spray corrosion test device for titanium alloy fasteners.

[0007] The salt spray corrosion test device for titanium alloy fasteners provided by the present application adopts the following technical solutions: A salt spray corrosion test device for titanium alloy fasteners, comprising: A receiving box provided with a hollow interior; A placement table, which is connected to the receiving box and is located inside the cavity of the receiving box; At least one salt spray nozzle, the salt spray nozzle is connected to the accommodating box, and the salt spray nozzle extends into the inner cavity of the accommodating box and is arranged towards the placing table; Two flow control pipes, the two flow control pipes are horizontally arranged and symmetrical about the placing table, and the flow control pipes are connected to the accommodating box, the inner cavity of the flow control pipe is communicated with the inner cavity of the accommodating box, and a movable plug is slidably connected in the flow control pipe; A flow control unit for synchronously moving the two movable plugs, the flow control unit is connected to the accommodating box, and the flow control unit is connected to the movable plug.

[0008] By adopting the above technical solutions, first, the preparation of the salt spray solution is completed, and the shape and mass of the specimen are recorded at the same time; then the accommodating box is opened and the specimen is fixed on the placing table, and the relative angle between the specimen and the salt spray nozzle is adjusted; then the salt spray is sprayed through the salt spray nozzle to corrode the specimen, and at the same time, the movable plug is pushed to slide by means of the flow control unit, and the flow state of the salt spray in the accommodating box is controlled to improve the uniformity of the contact degree between the salt spray and various parts of the surface of the specimen; finally, the specimen after the preset corrosion time is taken out, the shape and mass of the specimen at this time are recorded and compared with the initial data to obtain the salt spray corrosion resistance of the specimen; the designed salt spray corrosion test device for titanium alloy fasteners can form a closed test environment through the accommodating box, the specimen can be fixed through the placing table, the salt spray can be sprayed on the specimen on the placing table through the salt spray nozzle, and through the cooperation of the flow control pipe, the movable plug and the flow control unit, the fluidity of the salt spray in the accommodating box can be enhanced and the flow direction can be increased, so as to realize the uniformity of the contact between the salt spray and each surface of the specimen, ensure the accuracy of the salt spray corrosion test result, and moreover, when the accommodating box needs to be cleaned after the salt spray corrosion test, water can be directly poured into the accommodating box, and then the reciprocating sliding of the movable plug is used to realize the cleaning of the accommodating box.

[0009] In a specific feasible embodiment, the placing table includes: An installation vertical plate, the installation vertical plate is located in the inner cavity of the accommodating box and is connected to the accommodating box, and the two flow control pipes are symmetrical about the installation vertical plate; A fixing plate, the fixing plate is connected to the installation vertical plate; A rotating bearing plate, the rotating bearing plate is rotatably connected to the fixing plate, and the rotating shaft of the rotating bearing plate is vertically arranged, and ventilation holes are formed in both the fixing plate and the rotating bearing plate.

[0010] By adopting the above technical solutions, the designed placing table can support the fixing plate through the installation vertical plate, and through the cooperation of the fixing plate and the rotating bearing plate, the rotation of the specimen relative to the accommodating box can be realized, so as to facilitate the specimen to contact the salt spray more fully and evenly.

[0011] In a specific feasible implementation, the top wall of the fixed plate is horizontally arranged, and the distance between the top wall of the rotating bearing plate and the top wall of the fixed plate gradually decreases from the periphery to the center.

[0012] By adopting the above technical solution, the rotating bearing plate with the distance between the top wall and the top wall of the fixed plate gradually decreasing from the periphery to the center is designed, which can facilitate the support of the specimen while reducing the contact area between the specimen and the rotating bearing plate.

[0013] In a specific feasible implementation, the mounting vertical plate is hollow and has an open top wall. The inner cavity of the mounting vertical plate is communicated with the ventilation hole, and a ring-shaped accommodating through hole is formed on the mounting vertical plate, and the ring-shaped accommodating through hole is communicated with the inner cavity of the mounting vertical plate.

[0014] By adopting the above technical solution, the designed ring-shaped accommodating through hole can convey the salt spray air flow that pushes the movable plug to move horizontally to the ventilation hole through the inner cavity of the mounting vertical plate and then contact the bottom wall of the specimen.

[0015] In a specific feasible implementation, it further includes a driving fan blade, and a plurality of driving rods are connected to the driving fan blade. The driving rods extend into the inner cavity of the mounting vertical plate and are slidably connected to the inner cavity wall of the mounting vertical plate.

[0016] By adopting the above technical solution, the cooperation of the designed driving fan blade and the driving rods can, during the process of the movable plug pushing the salt spray air flow to move horizontally, efficiently send the salt spray into the inner cavity of the mounting vertical plate through the vertical component force of the salt spray air flow acting on the driving fan blade, and the rotation of the driving fan blade can also increase the disorderliness of the salt spray air flow in the accommodating box, thereby more vividly restoring the situation encountered by the specimen during actual use.

[0017] In a specific feasible implementation, it further includes: A linkage ring, which is connected to the rotating bearing plate, and the central axis of the linkage ring coincides with the rotation axis of the rotating bearing plate. A plurality of triangular serrated protrusions are unidirectionally formed on the bottom wall of the linkage ring; An eccentric transmission rod, which is rotatably connected to the mounting vertical plate, and the rotation axis of the eccentric transmission rod is in the same direction as the rotation axis of the driving fan blade. The lower end of the eccentric transmission rod can abut against the driving rod, and the upper end of the eccentric transmission rod can abut against the triangular serrated protrusion after passing through the fixed plate.

[0018] By adopting the above technical solution, the designed linkage ring cooperating with the eccentric transmission rod can realize the rotation of the rotating bearing plate while the driving fan blade rotates, thereby facilitating the rotation of the specimen in the accommodating box, so that the circumferential side surface of the specimen can more fully contact the salt spray air flow.

[0019] In a specific feasible embodiment, the flow control unit includes: A driving cylinder, which is connected to the accommodation box, and the axial direction of the piston rod of the driving cylinder is consistent with the sliding direction of the movable plug; A connecting frame, which is connected to the piston rod of the driving cylinder, and both ends of the connecting frame extend into the inner cavity of the flow control pipe and are connected to the movable plug.

[0020] By adopting the above technical solution, the designed flow control unit can realize the synchronous movement of the two movable plugs through the cooperation of the driving cylinder and the connecting frame, and further realize the directional movement of the salt spray air flow in the accommodation box.

[0021] In a second aspect, the present application provides a method for salt spray corrosion test of titanium alloy fasteners.

[0022] A method for salt spray corrosion test of titanium alloy fasteners includes: S1: Preliminary preparation, complete the preparation of the salt spray solution, and record the shape and mass of the specimen; S2: Specimen fixation, open the accommodation box and fix the specimen on the placement table, and adjust the relative angle between the specimen and the salt spray nozzle; S3: Corrosion test, spray salt spray on the specimen through the salt spray nozzle for salt spray corrosion, and at the same time use the flow control unit to push the movable plug to slide, control the flow state of the salt spray in the accommodation box, and improve the uniformity of the contact degree between the salt spray and various parts of the surface of the specimen; S4: Comparative calculation, take out the specimen after the preset corrosion time, record the shape and mass of the specimen at this time and compare with the initial data to obtain the salt spray corrosion resistance of the specimen.

[0023] By adopting the above technical solution, first prepare the salt spray solution and record the shape and mass of the specimen at the same time; then open the accommodation box, fix the specimen on the placement table, and adjust the relative angle between the specimen and the salt spray nozzle; then spray salt spray through the salt spray nozzle to corrode the specimen with salt spray. At the same time, drive the movable plug to slide with the help of the flow control unit to control the flow state of the salt spray in the accommodation box and improve the uniformity of the contact degree between the salt spray and various parts of the surface of the specimen; finally, take out the specimen after the preset corrosion time, record the shape and mass of the specimen at this time and compare with the initial data to obtain the salt spray corrosion resistance of the specimen. The designed salt spray corrosion test method for titanium alloy fasteners can form a closed test environment through the accommodation box, can be used to fix the specimen through the placement table, can spray salt spray on the specimen on the placement table through the salt spray nozzle, and through the cooperation of the flow control pipe, the movable plug and the flow control unit, the fluidity of the salt spray in the accommodation box can be enhanced and the flow direction can be increased, so as to realize the uniformity of the contact between the salt spray and each surface of the specimen, ensure the accuracy of the salt spray corrosion test result. Moreover, when the accommodation box needs to be cleaned after the salt spray corrosion test, water can be directly poured into the accommodation box, and then the reciprocating sliding of the movable plug can be used to clean the accommodation box.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The designed salt spray corrosion test device for titanium alloy fasteners can form a closed test environment through the accommodation box, can be used to fix the specimen through the placement table, can spray salt spray on the specimen on the placement table through the salt spray nozzle, and through the cooperation of the flow control pipe, the movable plug and the flow control unit, the fluidity of the salt spray in the accommodation box can be enhanced and the flow direction can be increased, so as to realize the uniformity of the contact between the salt spray and each surface of the specimen, ensure the accuracy of the salt spray corrosion test result. Moreover, when the accommodation box needs to be cleaned after the salt spray corrosion test, water can be directly poured into the accommodation box, and then the reciprocating sliding of the movable plug can be used to clean the accommodation box.

[0025] 2. The designed salt spray corrosion test device for titanium alloy fasteners, through the cooperation of the driving fan blade and the driving rod, can efficiently send the salt spray into the inner cavity of the installation vertical plate through the vertical component force of the salt spray air flow acting on the driving fan blade during the process of the movable plug pushing the salt spray air flow to move horizontally, and the rotation of the driving fan blade can also increase the disorder of the salt spray air flow in the accommodation box, thus more vividly restoring the situation encountered by the specimen during actual use.

[0026] 3. The designed salt spray corrosion test device for titanium alloy fasteners, through the cooperation of the linkage ring and the eccentric transmission rod, can realize the rotation of the rotating bearing plate while the driving fan blade rotates, thereby facilitating the rotation of the specimen in the accommodation box, so that the circumferential side surface of the specimen can be more fully contacted with the salt spray air flow. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of a salt spray corrosion resistance test device for titanium alloy fasteners according to an embodiment of the present application.

[0028] Figure 2 is Figure 1 a cross-sectional view taken along the vertical direction of the axis of the flow control pipe in

[0029] Figure 3 is Figure 2 a partial structural schematic diagram in , mainly used to detail the structure of the placement table.

[0030] Figure 4 is Figure 3 a cross-sectional view in , mainly used to show the cooperation relationship between the driving fan blade, the driving rod and the eccentric transmission rod.

[0031] Figure 5 is Figure 4 an enlarged schematic view of part A in , mainly used to show the cooperation relationship between the linkage ring and the eccentric transmission rod.

[0032] Explanation of reference numerals: 1, accommodation box; 2, placement table; 21, mounting vertical plate; 211, annular accommodation through hole; 22, fixing plate; 23, rotating bearing plate; 3, salt spray nozzle; 4, flow control pipe; 5, movable plug; 6, flow control unit; 61, driving cylinder; 62, connecting frame; 7, driving fan blade; 71, driving rod; 8, linkage ring; 81, triangular serrated protrusion; 9, eccentric transmission rod. Detailed implementation manners

[0033] The following further elaborates on the present application in conjunction with the attached Figures 1-5 drawings.

[0034] An embodiment of the present application discloses a salt spray corrosion resistance test device and test method for titanium alloy fasteners.

[0035] In a first aspect, an embodiment of the present application discloses a salt spray corrosion resistance test device for titanium alloy fasteners.

[0036] Referring to Figure 1 and Figure 2, A salt spray corrosion test device for titanium alloy fasteners includes a containing box 1, a placement table 2, and a salt spray nozzle 3. The containing box 1 is hollow, and a specimen inlet and outlet passage is formed on the top wall of the containing box 1 and sealed by a cover plate. The placement table 2 is located inside the containing box 1, and the placement table 2 is connected to the containing box 1 to form a test area for placing specimens; the number of salt spray nozzles 3 is at least one. The salt spray nozzle 3 is bolted to the containing box 1, and the atomizing spray end of the salt spray nozzle 3 extends into the inner cavity of the containing box 1 and is set towards the test area; in this application, the number of salt spray nozzles 3 can be one, can be two, or can be other numbers, as long as it can spray salt spray towards the test area.

[0037] Refer to Figure 1 and Figure 2 , In order to achieve the contact consistency between the salt spray and each surface of the specimen, the salt spray corrosion test device for titanium alloy fasteners further includes a flow control pipe 4 and a flow control unit 6. The number of flow control pipes 4 is two. The two flow control pipes 4 are horizontally arranged and symmetric about the placement table 2. The flow control pipe 4 is welded and fixed to the containing box 1, and the inner cavity of the flow control pipe 4 is communicated with the inner cavity of the containing box 1. A movable plug 5 is slidably connected inside the flow control pipe 4, and the movable plug 5 divides the inner cavity of the flow control pipe 4 into two intervals; the flow control unit 6 is connected to the containing box 1 and is connected to the movable plug 5 to make the two movable plugs 5 move synchronously, so that the salt spray in the containing box 1 flows along the sliding direction of the movable plug 5.

[0038] Refer to Figure 1 and Figure 2 , Specifically, the flow control unit 6 includes a driving cylinder 61 and a connecting frame 62. The cylinder body of the driving cylinder 61 is bolted to the containing box 1, and the axial direction of the piston rod of the driving cylinder 61 is consistent with the sliding direction of the movable plug 5. The connecting frame 62 is bolted to the piston rod of the driving cylinder 61, and both ends of the connecting frame 62 extend into the inner cavity of the flow control pipe 4. The connecting frame 62 is detachably and fixedly connected to the movable plug 5.

[0039] Refer to Figure 2 and Figure 3 , Specifically, the placement table 2 includes a mounting vertical plate 21, a fixing plate 22, and a rotating bearing plate 23. The mounting vertical plate 21 is located inside the containing box 1, and the mounting vertical plate 21 is welded and fixed to the bottom wall of the containing box 1. The two flow control pipes 4 are symmetric about the mounting vertical plate 21. The fixing plate 22 is welded and fixed to the mounting vertical plate 21, and the top wall of the fixing plate 22 is horizontally arranged. The rotating bearing plate 23 is rotatably connected to the fixing plate 22, and the rotation axis of the rotating bearing plate 23 is vertically arranged. Ventilation holes are provided on both the fixing plate 22 and the rotating bearing plate 23.

[0040] Refer to Figure 3, Further, the distance between the top wall of the rotating bearing plate 23 and the top wall of the fixed plate 22 gradually decreases from the periphery to the center. Through the rotating bearing plate 23 with the distance between its top wall and the top wall of the fixed plate 22 gradually decreasing from the periphery to the center, it is convenient to reduce the contact area between the specimen and the rotating bearing plate 23 while realizing specimen support.

[0041] Refer to Figure 3 and Figure 4 , Furthermore, the mounting vertical plate 21 is hollow, and the top wall of the mounting vertical plate 21 is open. A strip-shaped hole is formed in the fixed plate 22. The inner cavity of the mounting vertical plate 21 communicates with the area above the fixed plate 22 through the strip-shaped hole. An annular receiving through hole 211 is formed in the mounting vertical plate 21, and the annular receiving through hole 211 communicates with the inner cavity of the mounting vertical plate 21. The axis of the annular receiving through hole 211 is horizontally arranged, and the axis of the annular receiving through hole 211 is consistent with the sliding direction of the movable plug 5; through the annular receiving through hole 211, the salt spray air flow that pushes the movable plug 5 to move horizontally can be conveyed to the ventilation hole through the inner cavity of the mounting vertical plate 21 and then contact the bottom wall of the specimen.

[0042] Refer to Figure 4 , The titanium alloy fastener salt spray corrosion test device further includes a driving fan blade 7. A plurality of driving rods 71 are welded and fixed on the driving fan blade 7. The number of the driving rods 71 is the same as the number of the fan blades on the driving fan blade 7. The driving rods 71 extend into the inner cavity of the mounting vertical plate 21, and the driving rods 71 are slidably connected to the inner cavity wall of the mounting vertical plate 21. In order to control the rotation trajectory of the driving rods 71, an annular recessed groove is formed on the mounting vertical plate 21, and the end of the driving rod 71 extends into the annular recessed groove; through the cooperation of the driving fan blade 7 and the driving rods 71, during the process of the movable plug 5 pushing the salt spray air flow to move horizontally, the salt spray can be efficiently sent into the inner cavity of the mounting vertical plate 21 through the vertical component force of the salt spray air flow acting on the driving fan blade 7, and the rotation of the driving fan blade 7 can also increase the disorderliness of the salt spray air flow in the accommodating box 1, thereby more realistically restoring the situation encountered by the specimen during actual use.

[0043] Refer to Figure 4 and Figure 5 , In order to realize the rotation of the specimen when the driving fan blade 7 rotates, the titanium alloy fastener salt spray corrosion test device further includes a linkage ring 8 and an eccentric transmission rod 9. The linkage ring 8 is welded and fixed to the bottom wall of the rotating bearing plate 23, and the central axis of the linkage ring 8 coincides with the rotation axis of the rotating bearing plate 23. A plurality of triangular serrated protrusions 81 are integrally formed on the bottom wall of the linkage ring 8. The plurality of triangular serrated protrusions 81 are arranged in a one-way circle on the linkage ring 8. In this application, the inclined surface of the triangular serrated protrusion 81 can be a straight inclined surface or a concave arc inclined surface.

[0044] Refer to Figure 4 and Figure 5, the eccentric drive rod 9 is rotatably connected to the mounting vertical plate 21 through a fixed shaft, and the rotation axis of the eccentric drive rod 9 is in the same direction as the rotation axis of the driving fan blade 7. The lower end of the eccentric drive rod 9 can extend into the rotation area of the drive rod 71 and then abut against the drive rod 71, and the upper end of the eccentric drive rod 9 can abut against the vertical surface or inclined surface of the triangular serrated protrusion 81 after passing through the strip-shaped hole, so as to realize the rotation of the linkage ring 8, and then realize the rotation of the test on the rotating bearing plate 23, so that the circumferential side surface of the specimen can be more fully contacted with the salt spray airflow.

[0045] The implementation principle of a salt spray corrosion test device for titanium alloy fasteners in an embodiment of the present application is as follows: First, prepare the salt spray solution, and record the shape and mass of the specimen at the same time; then open the accommodation box 1 and fix the specimen on the placement table 2, and adjust the relative angle between the specimen and the salt spray nozzle 3; then, an external pressurizing device extracts the salt spray solution from the salt spray modulation barrel and atomizes and sprays it through the salt spray nozzle 3, so that the salt spray corrodes the specimen. At the same time, the control flow unit 6 is used to push the movable plug 5 to slide, and the flow state of the salt spray in the accommodation box 1 is controlled. When the salt spray airflow horizontally passes through the driving fan blade 7, it pushes the driving fan blade 7 to rotate. When the driving fan blade 7 rotates, it applies force to the triangular serrated protrusion 81 on the linkage ring 8 through the drive rod 71 and the eccentric drive rod 9, so that the linkage ring 8 and the rotating bearing plate 23 rotate, and then the specimen rotates, improving the uniformity of the contact degree between the salt spray and various parts of the surface of the specimen; finally, take out the specimen after the preset corrosion time, record the shape and mass of the specimen at this time and compare with the initial data to obtain the salt spray corrosion resistance of the specimen; the designed salt spray corrosion test method for titanium alloy fasteners can form a closed test environment through the accommodation box 1, can be used to fix the specimen through the placement table 2, can spray salt spray on the specimen on the placement table 2 through the salt spray nozzle 3, and through the cooperation of the control flow pipe 4, the movable plug 5 and the control flow unit 6, the fluidity of the salt spray in the accommodation box 1 can be enhanced and the flow direction can be increased, so as to realize the uniformity of the contact between the salt spray and each surface of the specimen, ensure the accuracy of the salt spray corrosion test result, and, when the accommodation box 1 needs to be cleaned after the salt spray corrosion test, water can be directly poured into the accommodation box 1, and then through the reciprocating sliding of the movable plug 5, the cleaning of the accommodation box 1 can be realized.

[0046] In a second aspect, an embodiment of the present application discloses a salt spray corrosion test method for titanium alloy fasteners.

[0047] Refer to Figures 1 to 5 , a salt spray corrosion test method for titanium alloy fasteners, which is realized by using the salt spray corrosion test device for titanium alloy fasteners disclosed in the first aspect of the embodiment of the present application, and specifically includes: S1: Preliminary preparation, prepare the salt spray solution, and record the shape and mass of the specimen; S2: Fix the sample, open the containing box 1 and fix the sample on the placing table 2, and adjust the relative angle between the sample and the salt spray nozzle 3; S3: Corrosion test, the salt spray nozzle 3 sprays salt spray to perform salt spray corrosion on the sample, and at the same time, the flow control unit 6 pushes the movable plug 5 to slide, controls the flow state of the salt spray in the containing box 1, and improves the uniformity of the contact between the salt spray and the surface of the sample; S4: Comparative calculation: take out the sample after the preset corrosion time, record the shape and quality of the sample at this time and compare it with the initial data to obtain the salt spray corrosion resistance of the sample.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A salt spray corrosion resistance test device for titanium alloy fasteners, characterized in that: Comprising: A receiving box (1) provided with a hollow interior; A placement table (2), the placement table (2) being connected to the receiving box (1), and the placement table (2) being located inside the receiving box (1); At least one salt spray nozzle (3), the salt spray nozzle (3) being connected to the receiving box (1), and the salt spray nozzle (3) extending into the interior of the receiving box (1) and being arranged towards the placement table (2); Two flow control tubes (4), the two flow control tubes (4) being horizontally arranged and symmetric about the placement table (2), and the flow control tubes (4) being connected to the receiving box (1), the interior cavity of the flow control tubes (4) being in communication with the interior cavity of the receiving box (1), and a movable plug (5) being slidably connected inside the flow control tubes (4); A flow control unit (6) for synchronously moving the two movable plugs (5), the flow control unit (6) being connected to the receiving box (1), and the flow control unit (6) being connected to the movable plug (5).

2. The salt spray corrosion test device for titanium alloy fasteners according to claim 1, characterized in that: The placement table (2) includes: An installation vertical plate (21), the installation vertical plate (21) being located inside the receiving box (1) and connected to the receiving box (1), and the two flow control tubes (4) being symmetric about the installation vertical plate (21); A fixing plate (22), the fixing plate (22) being connected to the installation vertical plate (21); A rotating bearing plate (23), the rotating bearing plate (23) being rotatably connected to the fixing plate (22), and the rotation axis of the rotating bearing plate (23) being vertically arranged, and ventilation holes being provided on both the fixing plate (22) and the rotating bearing plate (23).

3. The titanium alloy fastener salt spray corrosion resistance test device according to claim 2, characterized in that: The top wall of the fixing plate (22) is horizontally arranged, and the distance between the top wall of the rotating bearing plate (23) and the top wall of the fixing plate (22) gradually decreases from the periphery to the center.

4. The salt spray corrosion resistance test device for titanium alloy fasteners according to claim 2, characterized in that: The installation vertical plate (21) is hollow and has an open top wall, the interior cavity of the installation vertical plate (21) is in communication with the ventilation holes, and an annular receiving through hole (211) is provided on the installation vertical plate (21), and the annular receiving through hole (211) is in communication with the interior cavity of the installation vertical plate (21).

5. The salt spray corrosion resistance test device for titanium alloy fasteners according to claim 4, wherein: It further includes a driving fan blade (7), and a plurality of driving rods (71) are connected to the driving fan blade (7), and the driving rods (71) extend into the interior cavity of the installation vertical plate (21) and are slidably connected to the inner wall of the interior cavity of the installation vertical plate (21).

6. The titanium alloy fastener salt spray corrosion resistance test device according to claim 5, characterized in that: It further includes: A linkage ring (8), the linkage ring (8) being connected to the rotating bearing plate (23), and the central axis of the linkage ring (8) coinciding with the rotation axis of the rotating bearing plate (23), and a plurality of triangular serrated protrusions (81) being formed unidirectionally on the bottom wall of the linkage ring (8); An eccentric transmission rod (9), the eccentric transmission rod (9) being rotatably connected to the installation vertical plate (21), and the rotation axis of the eccentric transmission rod (9) being in the same direction as the rotation axis of the driving fan blade (7), the lower end of the eccentric transmission rod (9) being able to abut against the driving rod (71), and the upper end of the eccentric transmission rod (9) being able to abut against the triangular serrated protrusions (81) after passing through the fixing plate (22).

7. The salt spray corrosion resistance test device for titanium alloy fasteners according to claim 1, characterized in that: The flow control unit (6) includes: A driving cylinder (61), the driving cylinder (61) is connected to the accommodating box (1), and the axial direction of the piston rod of the driving cylinder (61) is consistent with the sliding direction of the movable plug (5); A connecting frame (62), the connecting frame (62) is connected to the piston rod of the driving cylinder (61), and both ends of the connecting frame (62) respectively extend into the inner cavity of the flow control pipe (4) and are connected to the movable plug (5).

8. A method for salt spray corrosion resistance test of titanium alloy fasteners, characterized in that: It is realized by using the titanium alloy fastener salt spray corrosion test device according to any one of claims 1-7, including: S1: Preliminary preparation, complete the preparation of the salt spray solution, and record the shape and quality of the specimen; S2: Specimen fixation, open the accommodating box (1) and fix the specimen on the placement table (2), and adjust the relative angle between the specimen and the salt spray nozzle (3); S3: Corrosion test, spray salt spray on the specimen through the salt spray nozzle (3) for salt spray corrosion, and at the same time use the flow control unit (6) to push the movable plug (5) to slide, control the flow state of the salt spray in the accommodating box (1), and improve the uniformity of the contact degree between the salt spray and various parts of the surface of the specimen; S4: Comparative calculation, take out the specimen after the preset corrosion time, record the shape and quality of the specimen at this time and compare it with the initial data to obtain the salt spray corrosion resistance of the specimen.

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