A device for testing the corrosion resistance of a metal alloy surface

Abstract

The present application relates to the technical field of metal alloy corrosion resistance testing, and provides a metal alloy surface corrosion resistance testing device, which comprises a rack and a cable, the rack top and bottom are provided with anchors, the cable is installed between the two anchors, a test barrel is installed in the middle of the rack, four multi-tube bodies are arranged in the test barrel, a low-temperature cold air dryer and a blowing hot air dryer are installed on the rack; through the cooperation of low-temperature cold air, high-temperature hot air and corrosion solution, a low-temperature high-humidity and high-temperature high-humidity environment is created, so as to test the corrosion resistance of the cable; the automatic telescopic rod is used to pull or push the rotating rod upwards or downwards to change the distance between the four multi-tube bodies, the pressure of the corrosion solution sprayed on the cable is adjusted, so as to control the penetration depth of the corrosion solution on the cable, and the corrosion effect of the cable when the corrosion solution penetrates to different depths is simulated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal alloy corrosion resistance testing, and particularly relates to a metal alloy surface corrosion resistance testing device. BACKGROUND

[0002] Cables are an important part of modern engineering construction and are widely used in many fields such as large bridges, building structures, cableways, etc. Cables usually use high-strength galvanized steel wires or steel strands and other carbon steel alloys. In bridge construction, cables are often eroded by humid environments, seawater, etc. With the continuous development of construction technology and the increasing demand for engineering, the requirements for cable corrosion resistance are becoming higher and higher. Therefore, the quality monitoring and safety evaluation of cables are required to be higher. However, the existing corrosion resistance testing device still has some problems.

[0003] In low-temperature and high-temperature environments, cables have different corrosion conditions, and cables are also affected by stress when they are affected, which affects the corrosion performance and increases the demand for equipment. Therefore, the existing corrosion resistance testing machine needs to adapt to low-temperature and high-temperature environments when testing, which increases the cost of the equipment. Cables are often subjected to salt spray corrosion and dry alternating processes, which accelerate the corrosion speed and corrosion degree. The existing corrosion resistance testing machine directly soaks cables in corrosion solution for corrosion, which is relatively complex to replace different environmental processes and cannot control the penetration depth of the corrosion solution to the cables, so as to simulate the corrosion effect of the cables when the corrosion solution penetrates to different depths. At the same time, the corrosion products produced by cable corrosion are easy to accumulate on the cables, which hinders the penetration of the corrosion solution or changes the pH value of the corrosion environment, affecting the corrosion effect of the corrosion solution and the accuracy of the cable corrosion fatigue test.

[0004] Therefore, the application provides a metal alloy surface corrosion resistance testing device. SUMMARY

[0005] The application provides a metal alloy surface corrosion resistance testing device, which is tested by setting test barrels with different test environments, so as to solve the problems in the background art.

[0006] The technical scheme of the application is as follows:

[0007] The utility model provides a kind of metal alloy surface anticorrosion performance testing device, including: frame and cable, the frame top and bottom are provided with anchor, the cable is installed between two anchors, testing barrel is installed in the frame middle, four multi-tube bodies are provided in the testing barrel, the cable passes through from testing barrel center, low-temperature cold air drying machine and air blast hot drying machine are installed on the frame, the low-temperature cold air drying machine is connected with testing barrel by copper pipe one, the air blast hot drying machine is connected with testing barrel by copper pipe two, liquid storage barrel is installed on the frame, a plurality of infusion tubes one are communicated between the liquid storage barrel and testing barrel bottom, infusion tube two is fixedly connected on the liquid storage barrel, liquid pump is installed on infusion tube two, current clamp is installed on the frame, and the current clamp is clamped on the cable.

[0008] Preferably, the testing barrel is divided into an upper and lower cylindrical barrel body and a conical barrel body, the cylindrical barrel body is connected by a shaft between two half-cylindrical bodies, and a motor for driving the shaft to rotate is installed on the cylindrical barrel body. The contact position of the two half-cylindrical bodies is fixedly connected with a sealing strip. A semicircular hole is formed in the center of the top of each half-cylindrical body of the testing barrel. A circular hole is formed in the center of the bottom of the testing barrel. The radius and depth of the semicircular hole and the circular hole are the same, and a sealing ring is fixedly connected in each hole. A metal sleeve is fixedly connected to the bottom of the testing barrel, covering the upper surface of the sealing ring at the bottom of the testing barrel.

[0009] Preferably, the sealing ring at the top of the testing barrel is a hollow cylindrical shape, and the sealing ring at the bottom is a hollow conical frustum shape.

[0010] Preferably, a liquid supplementing funnel is fixedly connected to the side of the liquid storage barrel, and a liquid discharge port is formed in the bottom of the liquid storage barrel.

[0011] Preferably, four automatic telescopic rods are uniformly installed on the top of the testing barrel. The heads of the automatic telescopic rods pass through the testing barrel and enter the inside of the testing barrel. Two rotating rods are arranged in the testing barrel below the four automatic telescopic rods. A circular ring II is fixedly connected to the head of each automatic telescopic rod. The rotating rods near the top of the testing barrel pass through the circular ring II. One end of each rotating rod is rotatably connected to the inner wall of the testing barrel, and the other end is rotatably connected to a multi-tube body. The four multi-tube bodies are composed of multiple arc-shaped tubes and are in communication. Multiple rows of nozzles are formed in the inner arc surface of the multi-tube body.

[0012] Preferably, four metal hoses are installed on the top of the testing barrel. One end of each metal hose is fixedly connected to a multi-tube body and is in communication. The other end of each metal hose passes through the testing barrel and is provided with a connecting head. Four infusion tubes III are installed on one end of the infusion tube II. One end of each infusion tube III is fixedly connected to the infusion tube II and is in communication. The other end of each infusion tube III is connected to the metal hose through the connecting head.

[0013] Preferably, the actuator is mounted on the anchor of the top of the rack.

[0014] Preferably, the test barrel is made of hastelloy or titanium alloy.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1、The low-temperature cold air drying machine inputs cold air into the test barrel to reduce the temperature in the test barrel, and the liquid pump pressurizes the corrosion solution into the test barrel to test the corrosion resistance of the cable under low-temperature environment; the hot air drying machine inputs dry hot air into the test barrel to increase the temperature in the test barrel, and the liquid pump pressurizes the corrosion solution into the test barrel to test the corrosion resistance of the cable under high-temperature environment; under the cooperation of low-temperature cold air, high-temperature hot air and corrosion solution, a low-temperature high-humidity and high-temperature high-humidity environment is created, so as to test the corrosion resistance of the cable.

[0017] 2、The automatic telescopic rod pulls or pushes the rotating rod to rotate upward or downward, so that the two rotating rods drive the four multi-tube bodies to move, so as to adjust the pressure of the corrosion solution sprayed on the cable by changing the distance between the four multi-tube bodies, so as to control the penetration depth of the corrosion solution on the cable, and then simulate the corrosion effect of the cable when the corrosion solution penetrates different depths, and calculate the penetration depth of the corrosion solution by the current flowing through the current clamp, and then obtain the corrosion condition of the cable under different penetration depths, thereby providing technical support for subsequent cable application scenarios.

[0018] 3、The corrosion solution flows along the surface of the cable, which can improve the uniformity of the corrosion solution on the cable; at the same time, the sprayed corrosion solution flows into the liquid storage barrel through the liquid inlet pipe at the bottom of the test barrel, and the liquid pump is extracted again, so that the cable is continuously corroded in the circulation process, thereby simulating the corrosion condition of the cable in the corrosion environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of the test device of the present application;

[0020] Figure 2 is a partial perspective view of the test device of the present application;

[0021] Figure 3 is a perspective view of the internal structure of the test barrel of the present application;

[0022] Figure 4 is a partial perspective view of the test barrel of the present application.

[0023] In the drawings:

[0024] 1. Frame; 11. Anchor; 2. Cable; 3. Test barrel; 31. Multi-tube body; 32. Cylindrical barrel body; 33. Conical barrel body; 34. Motor; 35. Sealing strip; 36. Semicircular hole; 37. Circular hole; 38. Sealing ring; 39. Metal sleeve; 310. Automatic telescopic rod; 311. Rotating rod; 312. Ring 2; 313. Arc tube; 314. Nozzle; 315. Metal hose; 316. Connector; 317. Infusion tube 3; 4. Low-temperature cold air dryer; 41. Copper tube 1; 5. Blast hot dryer; 51. Copper tube 2; 6. Liquid storage barrel; 61. Infusion tube 1; 62. Infusion tube 2; 63. Liquid pump; 64. Rehydration funnel; 65. Drain port; 7. Current clamp; 8. Actuator. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0026] Example 1:

[0027] like Figures 1-4 As shown, the present invention provides a metal alloy surface corrosion resistance testing device, comprising: a frame 1 and a cable 2, wherein anchors 11 are provided at the top and bottom of the frame 1, the cable 2 is installed between the two anchors 11, a test barrel 3 is installed in the middle of the frame 1, four multi-tube bodies 31 are provided in the test barrel 3, the cable 2 passes through the center of the test barrel 3, a low-temperature cold air dryer 4 and a blast heat dryer 5 are installed on the frame 1, the low-temperature cold air dryer 4 is connected to the test barrel 3 through a copper tube 1 41, and can input dry cold air into the test barrel 3, the blast heat dryer 5 is connected to the test barrel 3 through a copper tube 2 51, and can input dry hot air into the test barrel 3, a liquid storage barrel 6 is installed on the frame 1, and a plurality of liquid infusion pipes 1 61 are connected between the liquid storage barrel 6 and the bottom of the test barrel 3, a liquid infusion pipe 2 62 is fixedly connected to the liquid storage barrel 6, and a liquid pump 63 is installed on the liquid infusion pipe 2 62, and a current clamp 7 is installed on the frame 1, and the current clamp 7 is clamped on the cable 2.

[0028] like Figures 1-3 As shown, the test barrel 3 is divided into a cylindrical barrel body 32 and a conical barrel body 33 arranged upper and lower. The cylindrical barrel body 32 is connected by a rotating shaft, and a motor 34 for driving the rotating shaft to rotate is installed on the cylindrical barrel body 32. The contact position of the two semi-cylinders is fixedly connected with a sealing strip 35. A semicircular hole 36 is opened in the top center of the two semi-cylindrical parts of the test barrel 3, and a circular hole 37 is opened in the bottom center of the test barrel 3. The radius and depth of the semi-circular hole 36 and the circular hole 37 are the same, and a sealing ring 38 is fixedly connected in the semi-circular hole 36 and the circular hole 37. A metal sleeve 39 is fixedly connected to the bottom of the test barrel 3, and the metal sleeve 39 covers the upper surface of the sealing ring 38 at the bottom of the test barrel 3.

[0029] The sealing ring 38 at the top of the test barrel 3 is hollow cylindrical, and the sealing ring 38 at the bottom is hollow conical frustum, which cooperates with the test barrel 3 to form a seal.

[0030] When the cable 2 is installed, first, one end of the cable 2 is fixed in the anchor 11 at the bottom of the rack 1, then the two half-cylinders of the test barrel 3 are opened, and the cable 2 is passed through the sealing ring 38 from the round hole 37 at the bottom of the test barrel 3 and the semicircular hole 36 at the top of the test barrel 3 in turn, after that, the two half-cylinders of the test barrel 3 are closed, the infusion pipe three 317 and the metal hose 315 are connected through the connecting head 316, finally, the other end of the cable 2 is installed in the anchor 11 at the top of the rack 1, and the corrosion resistance test can be carried out; before the test starts, the current clamp 7 is clamped at both ends of the cable 2, and the current clamp 7 is powered on, the corrosion degree of the cable 2 is analyzed by measuring the current data, so as to obtain the corrosion resistance of the cable 2.

[0031] During the corrosion resistance test in the low-temperature environment, the low-temperature cold air dryer 4 inputs cold air into the test barrel 3 to reduce the temperature in the test barrel 3, and the liquid pump 63 pressurizes the corrosion solution into the test barrel 3 to test the corrosion resistance of the cable 2 in the low-temperature environment.

[0032] During the corrosion resistance test in the high-temperature environment, the air blowing hot dryer 5 is started to input dry hot air into the test barrel 3 to increase the temperature in the test barrel 3, and the liquid pump 63 pressurizes the corrosion solution into the test barrel 3 to test the corrosion resistance of the cable 2 in the high-temperature environment.

[0033] In the cooperation of low-temperature cold air and high-temperature hot air with the corrosion solution, a low-temperature and high-humidity environment and a high-temperature and high-humidity environment are created, so as to test the corrosion resistance of the cable 2.

[0034] The sealing ring 38 and the sealing strip 35 ensure the sealing of the test barrel 3, prevent external air from entering, avoid the overflow of cold air and hot air, affect the corrosion efficiency of the corrosion solution, and further affect the accuracy of the experiment; at the same time, it can prevent the corrosion solution from leaking and polluting the environment.

[0035] After the cable 2 is corroded for a period of time, the liquid pump 63 is turned off to stop inputting the corrosion solution, the low-temperature cold air dryer 4 or the air blowing hot dryer 5 is continued to be started to input dry cold air or hot air into the test barrel 3, so that the surface of the cable 2 is dry, so as to obtain the corrosion condition of the cable 2 with corrosion solution permeated on the surface in the dry environment, test the corrosion resistance of the cable 2 in this condition, and start the motor 34 to drive the two half-cylinders of the cylindrical barrel 32 to rotate, open one of the half-cylinders, ventilate, and accelerate the drying of the cable 2.

[0036] As Figures 1-4As shown, the device cools down the cable 2 by setting a test barrel 3 to simulate the corrosion of the cable 2 in low-temperature and high-temperature environments. Only part of the cable 2 is cooled, thereby reducing the impact of low-temperature and high-temperature environments on the stability and accuracy of the testing machine, reducing the difficulty of installing and testing the cable 2 in low-temperature and high-temperature environments, and thus reducing the cost of operating the experimental equipment in low-temperature and high-temperature environments.

[0037] The test barrel 3 is made of Hastelloy or titanium alloy, which has high corrosion resistance and prevents the corrosive solution from damaging the test barrel 3. At the same time, the surface of Hastelloy or titanium alloy is smooth, which prevents the corrosive solution from adhering to it, allowing the corrosive solution to enter the part of the conical barrel body 33.

[0038] Example 2:

[0039] like Figures 2-4 As shown, four automatic telescopic rods 310 are evenly installed on the top of the test barrel 3. The heads of the automatic telescopic rods 310 pass through the test barrel 3 and enter the interior of the test barrel 3. Two rotating rods 311 are provided in the test barrel 3 and below the four automatic telescopic rods 310. The heads of the automatic telescopic rods 310 are fixedly connected to the second ring 312. The rotating rod 311 near the top of the test barrel 3 passes through the second ring 312. One end of the two rotating rods 311 is rotatably connected to the inner wall of the test barrel 3, and the other end is rotatably connected to the multi-tube body 31. The four multi-tube bodies 31 are composed of multiple arc tubes 313 and are connected to each other, and multiple rows of nozzles 314 are provided on the inner arc surface of the multi-tube body 31.

[0040] Four metal hoses 315 are installed on the top of the test barrel 3. One end of the four metal hoses 315 is fixedly connected and communicated with the four multi-tube bodies 31 respectively, and the other end passes through the test barrel 3 and is installed with a connector 316. Four infusion tubes 317 are installed at one end of the infusion tube 2 62. One end of the four infusion tubes 317 is fixedly connected and communicated with the infusion tube 2 62, and the other end is connected to the metal hose 315 through the connector 316.

[0041] The corrosive solution is injected into the liquid storage barrel 6 and pressurized by the liquid pump 63. The pressurized corrosive solution is transported into the multi-tube body 31 through the second liquid infusion pipe 62, the third liquid infusion pipe 317, and the metal hose 315 and sprayed onto the cable 2 through the nozzle 314.

[0042] When the corrosion resistance test is performed, the two rotating rods 311 are driven to move by the automatic telescopic rod 310 pulling or pushing upward or downward, so that the four multi-tube bodies 31 are moved, the distance between the four multi-tube bodies 31 is changed, the pressure of the corrosion solution sprayed on the cable 2 is adjusted, the penetration depth of the corrosion solution to the cable 2 is controlled, the corrosion effect of the cable 2 when the corrosion solution penetrates to different depths is simulated, the penetration depth of the corrosion solution is calculated by the current flowing through the current clamp 7, and then the corrosion condition of the cable 2 under different penetration depths is obtained, thereby providing technical support for subsequent application scenarios of the cable 2.

[0043] Meanwhile, the multi-tube body 31 is composed of and communicated by a plurality of arc-shaped tubes 313, so that the corrosion solution flows in the plurality of arc-shaped tubes 313, which can not only provide a larger area of corrosion environment, but also balance the pressure of the corrosion solution through the plurality of arc-shaped tubes 313, and spray the corrosion solution through the plurality of rows of spray nozzles 314 at the same time, thereby increasing the uniformity of spraying, making the penetration depth of the corrosion solution on the cable 2 more uniform, and improving the accuracy of the experiment; because the bottom center of the test barrel 3 has a metal sleeve 39, the corrosion solution will flow on the metal sleeve 39, thereby reducing the corrosion of other parts of the test barrel 3 and improving the service life of the test barrel 3.

[0044] It should be noted that the cable 2 reacts with the corrosion solution to produce corrosion products, which hinder the penetration of the corrosion solution or change the pH value of the corrosion environment, so when the corrosion solution is sprayed on the cable 2 through the spray nozzles 314, the corrosion products on the surface of the cable 2 can be washed away, thereby improving the accuracy of the corrosion resistance test.

[0045] Moreover, the corrosion solution flows along the surface of the cable 2 during the corrosion resistance test of the cable 2, which can improve the uniformity of the corrosion of the cable 2 by the corrosion solution; meanwhile, the sprayed corrosion solution flows into the liquid storage barrel 6 through the liquid inlet pipe 61 at the bottom of the test barrel 3, and the liquid supply pump 63 extracts again, so that the cable 2 is continuously corroded in the circulation process, thereby simulating the corrosion condition of the cable 2 in the corrosion environment.

[0046] As shown in Figures 2-3 the liquid storage barrel 6 is fixedly connected with a liquid supplementing funnel 64 on the side, and the bottom of the liquid storage barrel 6 is provided with a liquid discharge port 65, so that the liquid is added through the liquid supplementing funnel 64 and discharged through the liquid discharge port 65.

[0047] The liquid storage barrel 6 is provided with the liquid supplementing funnel 64, and the liquid supplementing funnel 64 can also be used to add antifreeze to prevent the corrosion solution from condensing, or add acetic acid to reduce the pH value of the corrosion solution, thereby providing help for simulating different corrosion environments during the experiment.

[0048] When the cable 2 is broken, the current through the cable 2 measured by the current clamp 7 is zero, at this time, the telescopic rod 310 is immediately extended, the four multi-tube bodies 31 are moved to the inner wall of the test barrel 3 through the two rotating rods 311, and the broken cable 2 is prevented from damaging the multi-tube bodies 31 in the test barrel 3.

[0049] Embodiment three:

[0050] As shown in Figure 1 The actuator 8 is installed at the top of the rack 1, and the anchor 11 at the top of the rack 1 is installed on the actuator 8.

[0051] The actuator 8 applies stress to the anchor 11 and the cable 2, thereby simulating the corrosion resistance of the cable 2 under stress, improving the accuracy of the test, and not being affected by low temperature and high temperature.

[0052] The embodiments of the present application are given for example and description, although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as limiting the present application, and the ordinary skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments within the scope of the present application.

Claims

1. A device for testing the surface corrosion resistance of metal alloys, comprising: A rack (1) and a cable (2), characterized in that: the top and bottom of the rack (1) are both provided with anchors (11), the cable (2) is installed between the two anchors (11), a test barrel (3) is installed in the middle of the rack (1), four multi-tube bodies (31) are provided in the test barrel (3), the cable (2) passes through the center of the test barrel (3), a low-temperature cold air dryer (4) and a blast hot dryer (5) are installed on the rack (1), the low-temperature cold air dryer (4) is connected to the copper tube (4 1) is connected to the test barrel (3), the blast heat dryer (5) is connected to the test barrel (3) through the copper tube 2 (51), a liquid storage barrel (6) is installed on the frame (1), a plurality of liquid infusion pipes 1 (61) are connected between the liquid storage barrel (6) and the bottom of the test barrel (3), a liquid infusion pipe 2 (62) is fixedly connected to the liquid storage barrel (6), a liquid pump (63) is installed on the liquid infusion pipe 2 (62), and a current clamp (7) is installed on the frame (1), and the current clamp (7) is clamped on the cable (2); Four metal hoses (315) are installed on the top of the test barrel (3), one end of the four metal hoses (315) is fixedly connected to and communicates with the four multi-tube bodies (31), and the other end passes through the test barrel (3) and is installed with a connector (316). Four infusion tubes (317) are installed on one end of the infusion tube 2 (62), one end of the four infusion tubes (317) is fixedly connected to and communicates with the infusion tube 2 (62), and the other end is connected to the metal hose (315) through the connector (316).

2. The metal alloy surface corrosion resistance testing device according to claim 1, wherein: The test barrel (3) is divided into a cylindrical barrel body (32) and a conical barrel body (33) arranged above and below. The cylindrical barrel body (32) is connected by a rotating shaft, and a motor (34) for driving the rotating shaft is installed on the cylindrical barrel body (32). A sealing strip (35) is fixedly connected to the contact position of the two semi-cylinders. A semi-circular hole (36) is opened at the center of the top of the two semi-cylinder parts of the test barrel (3). A circular hole (37) is opened at the center of the bottom of the test barrel (3). The semi-circular hole (36) and the circular hole (37) have the same radius and depth. A sealing ring (38) is fixedly connected in the semi-circular hole (36) and the circular hole (37). A metal sleeve (39) is fixedly connected to the bottom of the test barrel (3). The metal sleeve (39) covers the upper surface of the sealing ring (38) at the bottom of the test barrel (3).

3. The metal alloy surface corrosion resistance testing device according to claim 2, wherein: The sealing ring (38) at the top of the test barrel (3) is in the shape of a hollow cylinder, and the sealing ring (38) at the bottom is in the shape of a hollow frustum.

4. The metal alloy surface corrosion resistance testing device according to claim 1, wherein: A liquid replenishing funnel (64) is fixedly connected to the side of the liquid storage barrel (6), and a liquid discharge port (65) is provided at the bottom of the liquid storage barrel (6).

5. The metal alloy surface corrosion resistance testing device according to claim 1, wherein: Four automatic telescopic rods (310) are evenly installed on the top of the test barrel (3), and the heads of the automatic telescopic rods (310) pass through the test barrel (3) and enter the interior of the test barrel (3). Two rotating rods (311) are provided in the test barrel (3) and below the four automatic telescopic rods (310). The heads of the automatic telescopic rods (310) are fixedly connected to the second circular ring (312). The rotating rods (311) near the top of the test barrel (3) pass through the second circular ring (312). One end of the two rotating rods (311) is rotatably connected to the inner wall of the test barrel (3), and the other end is rotatably connected to the multi-tube body (31). The four multi-tube bodies (31) are composed of a plurality of arc tubes (313) and are connected to each other, and the inner arc surface of the multi-tube body (31) is provided with a plurality of rows of nozzles (314).

6. The metal alloy surface corrosion resistance testing device according to claim 1, wherein: An actuator (8) is installed on the top of the frame (1), and an anchor (11) on the top of the frame (1) is installed on the actuator (8).

7. The metal alloy surface corrosion resistance testing device according to claim 1, wherein: The test barrel (3) is made of Hastelloy or titanium alloy.

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