In-situ test device for simulating deep sea environment flowing seawater scouring corrosion electrochemistry

Abstract

The present application relates to the technical field of material corrosion test, and particularly relates to a simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ test device, which comprises a pressure tank and a hydraulic cylinder, the top end of the pressure tank is provided with a sealing cover, the moving end of the hydraulic cylinder is connected with the sealing cover, and the lower part of the outer lateral wall of the pressure tank is provided with a drain valve; the device further comprises a test assembly, an electrode assembly, a pressure control device, a cooling device, a motor, a hollow rotating shaft, a rotating disc, a positioning piece and an electrochemical workstation, the motor is installed on the top end sealing cover of the pressure tank, the top end of the hollow rotating shaft is rotatably installed on the inner lateral wall top of the sealing cover, the output end of the motor is connected with the top end of the hollow rotating shaft, the positioning piece is arranged on the top end of the rotating disc, and the lower part of the hollow rotating shaft extends into the positioning piece; the device can accurately and effectively simulate the corrosion conditions of metal materials under different hydrostatic pressures and different seawater flow rates, and can realize real-time electrochemical test under high rotating speed, thereby improving the test efficiency and convenience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material corrosion testing, in particular to a simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ testing device. BACKGROUND

[0002] Underwater vehicles, underwater robots, deep-sea mining equipment power equipment and other equipment in deep-sea environment run under high speed and heavy load conditions, and there is a risk of flowing seawater scouring corrosion. The electrochemical corrosion and scouring wear occur simultaneously in the corrosive medium, resulting in the destruction of the metal surface. The mechanical-chemical combined action occurs in the presence of corrosive seawater medium. It is very difficult to achieve flowing seawater scouring corrosion simulation and in-situ testing analysis under such high seawater pressure in deep-sea environment. Therefore, relevant research needs to be carried out to provide data and technical support for the safe service of deep-sea equipment.

[0003] Deep-sea environment is completely different from land and shallow sea. The unique environmental characteristics of high hydrostatic pressure and low temperature in deep-sea environment pose new challenges to the service of metal materials in deep-sea. Due to the insufficient research on the scouring failure mechanism of metal materials used in deep-sea equipment such as deep-sea submersibles and deep-sea mining machines during deep-sea service, and the lack of relevant literature, it may be due to the long-term lack of devices that can simulate deep-sea abrasion environment.

[0004] Domestic and foreign experimental research on scouring corrosion mainly uses rotating scouring experimental devices, jet scouring experimental devices and pipe flow scouring experimental devices. The rotating test method has the advantages of simple operation, convenience, low equipment price and short test period. It can well simulate the corrosion of devices such as propellers. However, it is difficult to achieve rotating scouring corrosion simulation in deep-sea low-temperature high-pressure environment, and no relevant achievements have been found. Therefore, it is of great significance to design a simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ testing device to in-situ electrochemically test the scouring corrosion law of metal materials under different hydrostatic pressures and different seawater flow rates, reveal the scouring corrosion mechanism of materials under fluid flow in deep-sea environment, lay a foundation for material design, material selection and protection of deep-sea equipment, and ensure the safe operation of deep-sea moving equipment. SUMMARY

[0005] To solve the above technical problems, the present application provides a simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ testing device which can accurately and effectively simulate the corrosion of metal materials under different hydrostatic pressures and different seawater flow rates, and can perform real-time electrochemical testing at high speed, thereby improving the testing efficiency and testing convenience.

[0006] The simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ test device of the application comprises a pressure tank and a hydraulic cylinder, the top end of the pressure tank is provided with a sealing cover, the moving end of the hydraulic cylinder is connected with the sealing cover, and the lower part of the outer wall of the pressure tank is provided with a drain valve; the device further comprises a test assembly, an electrode assembly, a pressure control device, a cooling device, a motor, a hollow rotating shaft, a rotating disc, a positioning piece and an electrochemical workstation, the motor is installed on the top end sealing cover of the pressure tank, the top end of the hollow rotating shaft is rotatably installed on the inner wall of the sealing cover, the output end of the motor is connected with the top end of the hollow rotating shaft, the positioning piece is arranged on the top end of the rotating disc, the lower part of the hollow rotating shaft extends into the positioning piece, and the lower part of the hollow rotating shaft is connected with the rotating disc through a positioning pin, the test assembly is installed on the outer wall of the rotating disc, the test assembly is communicated with the electrochemical workstation, the electrode assembly is installed at the bottom end of the rotating disc, the electrode assembly is communicated with the electrochemical workstation, the pressure control device and the cooling device are respectively communicated with the pressure tank, the pressure control device is used for controlling the pressure in the pressure tank, and the cooling device is used for cooling the water in the pressure tank; the seawater mixed with solid particles is put into the pressure tank through the top end of the pressure tank, then the sealing cover is driven downward by the moving end of the hydraulic cylinder, the opening at the top end of the pressure tank is sealed by the sealing cover, the test assembly is installed on the outer wall of the rotating disc, and the rotating disc is immersed in the seawater, then the pressure tank is closed, the inside of the pressure tank is pressurized through the pressure device, so that the hydrostatic pressure in the pressure tank is controlled, the pressure of different deep-sea environments is simulated, the seawater in the pressure tank is cooled through the cooling device, so that the scouring corrosion test of seawater at different low temperatures is realized, then the hollow rotating shaft is driven to rotate by the motor, the rotating disc is driven to rotate by the hollow rotating shaft, the test assembly is driven to move circumferentially by the rotating disc, the scouring corrosion test of the test assembly at different speeds in the deep-sea flowing seawater is realized by controlling the rotating speed of the rotating disc, and the data of the test assembly and the electrode assembly are collected through the electrochemical workstation during the test, so that the electrochemical impedance and the polarization curve are tested, and the in-situ test of the electrochemical characteristics of the metal material is realized.

[0007] Preferably, the test assembly comprises a clamping piece, a test sample, an electromagnetic slip ring and a first lead wire, the clamping piece is arranged on the outer wall of the rotating disc, the test sample is installed on the clamping piece, the fixed end of the electromagnetic slip ring is installed on the outer wall of the sealing cover, the rotating end of the electromagnetic slip ring is sleeved on the outer wall of the hollow rotating shaft, the bottom end of the first lead wire is communicated with the test sample, the top end of the first lead wire penetrates through the inside of the second lead wire, and the top end of the first lead wire is communicated with the electrochemical workstation through the electromagnetic slip ring; the test sample is communicated with the bottom end of the first lead wire after being processed, then the test sample is installed on the clamping piece, so that the test sample is fixed on the outer wall of the rotating disc, the test sample is moved circumferentially by the rotating disc, so that the test sample is subjected to the deep-sea environment flowing seawater scouring corrosion test, and the convenience of normal electrochemical test when the rotating disc drives the test sample to move circumferentially is improved by arranging the electromagnetic slip ring and the first lead wire.

[0008] Preferably, the electrode assembly comprises a reference electrode, a second lead, an auxiliary electrode, a third lead and a sealing piece, the reference electrode is installed in the middle of the bottom end of the rotating disc, the bottom end of the reference electrode extends outside the rotating disc, the top end of the reference electrode is connected with the bottom end of the second lead, the top end of the second lead penetrates through the inside of the hollow rotating shaft, and the top end of the second lead is communicated with the electrochemical workstation through the electromagnetic slip ring, the auxiliary electrode is installed on the inner side wall of the pressure tank, the auxiliary electrode is communicated with the electrochemical workstation through the third lead, and the sealing piece is arranged at the joint position of the third lead and the pressure tank; the rotating disc drives the reference electrode to rotate after rotation, the convenience of normal power supply of the reference electrode during rotation of the rotating disc is improved by arranging the electromagnetic slip ring, and the convenience and stability of in-situ electrochemical testing of metal material corrosion are improved by cooperation of the reference electrode and the auxiliary electrode.

[0009] Preferably, the cooling device comprises a water cooling machine and a heat exchange pipe, both ends of the heat exchange pipe are communicated with the water cooling machine, and the middle part of the heat exchange pipe is coiled on the inner side wall of the pressure tank; the cooling medium is circulated and delivered in the heat exchange pipe by the water cooling machine, and the cooling medium is cooled and controlled at a constant temperature, so that the heat exchange pipe uses heat conduction to cool the seawater in the pressure tank, and the convenience of the device for in-situ electrochemical testing of sample scouring corrosion under different low-temperature environments is improved.

[0010] Preferably, the pressure control device comprises a pressure pump, and the output end of the pressure pump is communicated with the pressure tank; the pressure tank is pressurized by the pressure pump, so that the convenience of different deep-sea pressure environment simulation is realized.

[0011] Preferably, it further comprises a flow baffle, and the flow baffle is installed on the inner side wall of the pressure tank; when the rotating disc rotates and operates, the mixing uniformity of the seawater and solid particles in the pressure tank is improved, and the environmental simulation effect is improved by arranging the flow baffle.

[0012] Preferably, it further comprises a control console, and the control console is communicated with the motor; the rotation of the motor is controlled through the control console, and the convenience of rotating speed control and adjustment of the rotating disc is improved.

[0013] Preferably, a temperature controller is arranged in the pressure tank, two temperature sensing electrodes are installed at one end of the temperature sensor of the temperature controller, the two temperature sensing electrodes are respectively located on the two sides of the pressure tank, and the other end of the temperature controller is communicated with the water cooling machine; the temperature of the seawater in the pressure tank is detected, and the convenience of water cooling machine control is improved by arranging the temperature sensor.

[0014] Preferably, a polyurethane foam heat preservation layer is arranged on the outer side wall of the pressure tank; the heat insulation effect of the pressure tank is improved.

[0015] Preferably, a fixing groove is arranged on the outer side wall of the rotating disc, the sample is installed in the fixing groove of the rotating disc, and the sample is flush with the surface of the rotating disc after installation; when the rotating disc rotates, the influence of the sample on the rotating flow field is reduced.

[0016] Compared with the prior art, the beneficial effects of the present application are that the seawater mixed with solid particles is put into the inside of the pressure tank through the top end of the pressure tank, then the sealing cover is moved downward by the hydraulic cylinder moving end, the sealing cover seals the opening of the top end of the pressure tank, the test assembly is installed on the outer side wall of the rotating disc, and the rotating disc is immersed in the inside of the seawater, then the pressure tank is closed and the inside of the pressure tank is pressurized by the pressure device, so as to control the hydrostatic pressure in the pressure tank, realize the simulation of different deep sea environment pressures, and at the same time, the seawater in the pressure tank is cooled by the cooling device, so as to realize the scouring corrosion test of the seawater at different low temperatures, then the hollow rotating shaft is rotated by opening the motor, the hollow rotating shaft drives the rotating disc to rotate, the rotating disc drives the test assembly to move circumferentially after rotating, different rotating speeds of the rotating disc are controlled, so as to realize the deep sea environment flowing seawater scouring corrosion test of the test assembly at different speeds, and the data of the test assembly and the electrode assembly are collected by the electrochemical workstation during the test, so as to test the electrochemical impedance and the polarization curve, and realize the in-situ test of the electrochemical characteristics of the metal material. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the axonometric structure schematic diagram of the present application;

[0018] Figure 2 is the axonometric local structure schematic diagram of the connection of the hollow rotating shaft and the rotating disc;

[0019] Figure 3 is the axonometric local structure schematic diagram of the connection of the rotating disc and the clamping piece;

[0020] Figure 4 is the axonometric local structure schematic diagram of the connection of the sample and the first wire;

[0021] Figure 5 is the axonometric local structure schematic diagram of the connection of the pressure tank and the heat exchange pipe;

[0022] Figure 6 is the axonometric local structure schematic diagram of the connection of the hollow rotating shaft and the electromagnetic slip ring.

[0023] In the drawings, 101 is the pressure tank, 102 is the hydraulic cylinder, 103 is the motor, 104 is the hollow rotating shaft, 105 is the rotating disc, 106 is the positioning piece, 107 is the electrochemical workstation, 201 is the clamping piece, 202 is the sample, 203 is the electromagnetic slip ring, 204 is the first wire, 301 is the reference electrode, 302 is the second wire, 303 is the auxiliary electrode, 304 is the third wire, 305 is the sealing piece, 401 is the water chiller, 402 is the heat exchange pipe, 501 is the pressure pump, 601 is the flow baffle, and 701 is the control console. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0025] Example 1

[0026] like Figures 1 to 6 As shown, the electrochemical in-situ testing device for simulating deep-sea environment erosion corrosion by flowing seawater of the present invention includes a pressure tank 101 and a hydraulic cylinder 102. A sealing cover is provided at the top of the pressure tank 101, and the moving end of the hydraulic cylinder 102 is connected to the sealing cover. A drain valve is provided at the lower part of the outer wall of the pressure tank 101. It also includes test components, electrode components, a pressure control device, a cooling device, a motor 103, a hollow rotating shaft 104, a turntable 105, a positioning component 106, and an electrochemical workstation 107. The motor 103 is mounted on the sealing cover at the top of the pressure tank 101, and the top of the hollow rotating shaft 104 is rotatably mounted on the top of the inner wall of the sealing cover. The output end is connected to the top of the hollow rotating shaft 104. The positioning component 106 is set at the top of the turntable 105. The lower part of the hollow rotating shaft 104 extends into the positioning component 106 and is connected to the turntable 105 through a positioning pin. The test assembly is installed on the outer wall of the turntable 105 and is connected to the electrochemical workstation 107. The electrode assembly is installed at the bottom of the turntable 105 and is connected to the electrochemical workstation 107. The pressure control device and the cooling device are respectively connected to the pressure tank 101. The pressure control device is used to control the pressure in the pressure tank 101, and the cooling device is used to cool the water in the pressure tank 101.

[0027] like Figure 2 and Figure 3 As shown, the test assembly includes a clamp 201, a sample 202, an electromagnetic slip ring 203, and a first wire 204. The clamp 201 is disposed on the outer wall of the turntable 105, the sample 202 is mounted on the clamp 201, the fixed end of the electromagnetic slip ring 203 is mounted on the outer wall of the sealing cover, the rotating end of the electromagnetic slip ring 203 is fitted on the outer wall of the hollow rotating shaft 104, the bottom end of the first wire 204 is connected to the sample 202, the top end of the first wire 204 passes through the interior of the second wire 302, and the top end of the first wire 204 is connected to the electrochemical workstation 107 through the electromagnetic slip ring 203.

[0028] In the embodiment, the seawater mixed with solid particles is put into the pressure tank 101 through the top end, then the sealing cover is moved downward by the hydraulic cylinder 102, the sealing cover seals the opening at the top end of the pressure tank 101, the test assembly is installed on the outer side wall of the rotating disc 105, and the rotating disc 105 is immersed in the seawater, then the pressure tank 101 is closed and pressurized by the pressure device, so as to control the hydrostatic pressure in the pressure tank 101, simulate different deep-sea environmental pressures, and realize the seawater scouring corrosion test at different low temperatures by the cooling device, then the hollow shaft 104 is rotated by the motor 103, the rotating disc 105 is rotated by the hollow shaft 104, the rotating disc 105 rotates to move the test assembly in the circumferential direction, different rotating speeds of the rotating disc 105 are controlled, so as to realize the deep-sea environmental flowing seawater scouring corrosion test of the test assembly at different speeds, and the data of the test assembly and the electrode assembly are collected by the electrochemical workstation 107 during the test, so as to test the electrochemical impedance and the polarization curve, and realize the in-situ test of the electrochemical characteristics of the metal material.

[0029] Embodiment 2

[0030] Based on the embodiment 1, as shown in Figure 1 and Figure 2 , the electrode assembly comprises a reference electrode 301, a second lead wire 302, an auxiliary electrode 303, a third lead wire 304 and a sealing member 305, the reference electrode 301 is installed at the middle of the bottom end of the rotating disc 105, the bottom end of the reference electrode 301 extends outside the rotating disc 105, the top end of the reference electrode 301 is connected with the bottom end of the second lead wire 302, the top end of the second lead wire 302 penetrates through the inside of the hollow shaft 104, and the top end of the second lead wire 302 is communicated with the electrochemical workstation 107 through the electromagnetic slip ring 203, the auxiliary electrode 303 is installed on the inner side wall of the pressure tank 101, the auxiliary electrode 303 is communicated with the electrochemical workstation 107 through the third lead wire 304, and the sealing member 305 is arranged at the joint position of the third lead wire 304 and the pressure tank 101.

[0031] As shown in Figure 1 , the cooling device comprises a water cooler 401 and a heat exchange pipe 402, both ends of the heat exchange pipe 402 are communicated with the water cooler 401, and the middle part of the heat exchange pipe 402 is coiled on the inner side wall of the pressure tank 101.

[0032] As shown in Figure 1 , the pressure control device comprises a pressure pump 501, and the output end of the pressure pump 501 is communicated with the pressure tank 101.

[0033] As shown in Figure 1 , it further comprises a flow deflector 601, and the flow deflector 601 is installed on the inner side wall of the pressure tank 101.

[0034] AsFigure 1 As shown, it also includes a control console 701, which is connected to the motor 103;

[0035] like Figure 1 As shown, a temperature controller is installed inside the pressure tank 101. Two temperature sensing electrodes are installed at one end of the temperature sensor of the temperature controller. The two temperature sensing electrodes are located on the inner and outer sides of the pressure tank 101, respectively. The other end of the temperature controller is connected to the water chiller 401.

[0036] like Figure 3 As shown, the outer wall of the pressure tank 101 is provided with a polyurethane foam insulation layer.

[0037] like ​ As shown, a fixing groove is provided on the outer side wall of the turntable 105, and the sample 202 is installed in the fixing groove of the turntable 105. After the sample 202 is installed, it is flush with the surface of the turntable 105.

[0038] In this embodiment, after processing, the sample 202 is connected to the bottom end of the first wire 204. Then, the sample 202 is installed on the clamp 201, thereby fixing the sample 202 on the outer wall of the turntable 105. After the turntable 105 rotates, it drives the sample 202 to move circumferentially, thereby enabling the sample 202 to undergo a deep-sea environment flowing seawater erosion corrosion test. By setting the electromagnetic slip ring 203 and the first wire 204, the convenience of normal electrochemical testing when the turntable 105 rotates and drives the sample 202 to move circumferentially is improved. After the turntable 105 rotates, it drives the reference electrode 301 to rotate. By setting the electromagnetic slip ring 203, the convenience of normal energization of the reference electrode 301 when the turntable 105 rotates is improved. By using the reference electrode 301 and the auxiliary electrode 303 in combination, the convenience and stability of in-situ electrochemical testing of metal corrosion are improved.

[0039] The present invention provides an electrochemical in-situ testing device for simulating deep-sea environment flowing seawater erosion corrosion. During operation, seawater mixed with solid particles is introduced into a pressure tank 101 via a hydraulic cylinder 102. The test components are mounted on the outer wall of a turntable 105, which is then immersed in the seawater. The pressure tank 101 is then sealed and pressurized using a pressure device to control the hydrostatic pressure within it, simulating different deep-sea environment pressures. Simultaneously, a cooling device cools the seawater within the pressure tank 101, enabling erosion corrosion testing at different low temperatures. A motor 103 is then activated to rotate a hollow shaft 104, which in turn rotates the turntable 105. This rotation of the turntable 105 causes the test components to move circumferentially. By controlling different rotational speeds of the turntable 105, deep-sea environment flowing seawater erosion corrosion tests at different speeds are achieved. During the test, an electrochemical workstation 107 collects data from the test components and electrode components.

[0040] The motor 103, the electrochemical workstation 107, the electromagnetic slip ring 203, the water cooler 401, the pressure pump 501 and the control console 701 of the simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ test device are purchased on the market, and a person skilled in the art only needs to install and operate according to the attached instruction manual without creative labor of a person skilled in the art.

[0041] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the art, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An electrochemical in-situ testing device for simulating deep-sea environment erosion corrosion by flowing seawater, comprising a pressure tank (101) and a hydraulic cylinder (102), wherein a sealing cover is provided at the top of the pressure tank (101), the moving end of the hydraulic cylinder (102) is connected to the sealing cover, and a drain valve is provided at the lower part of the outer side wall of the pressure tank (101); characterized in that, It also includes test components, electrode components, pressure control device, cooling device, motor (103), hollow shaft (104), turntable (105), positioning element (106), and electrochemical workstation (107). The motor (103) is mounted on the top sealing cover of the pressure tank (101). The top of the hollow shaft (104) is rotatably mounted on the top of the inner wall of the sealing cover. The output end of the motor (103) is connected to the top of the hollow shaft (104). The positioning element (106) is set on the top of the turntable (105). The lower part of the hollow shaft (104) extends into the positioning element. Inside component (106), and the lower part of the hollow rotating shaft (104) is connected to the turntable (105) by a positioning pin. The test component is installed on the outer wall of the turntable (105) and is connected to the electrochemical workstation (107). The electrode component is installed at the bottom of the turntable (105) and is connected to the electrochemical workstation (107). The pressure control device and the cooling device are respectively connected to the pressure tank (101). The pressure control device is used to control the pressure inside the pressure tank (101), and the cooling device is used to cool the water inside the pressure tank (101). The test assembly includes a clip (201), a sample (202), an electromagnetic slip ring (203), and a first wire (204). The clip (201) is set on the outer wall of the turntable (105), the sample (202) is installed on the clip (201), the fixed end of the electromagnetic slip ring (203) is installed on the outer wall of the sealing cover, the rotating end of the electromagnetic slip ring (203) is fitted on the outer wall of the hollow rotating shaft (104), the bottom end of the first wire (204) is connected to the sample (202), the top end of the first wire (204) passes through the inside of the second wire (302), and the top end of the first wire (204) is connected to the electrochemical workstation (107) through the electromagnetic slip ring (203). The pressure control device includes a pressure pump (501), the output end of which is connected to a pressure tank (101); The outer wall of the turntable (105) is provided with a fixing groove, and the sample (202) is installed in the fixing groove of the turntable (105). After the sample (202) is installed, it is flush with the surface of the turntable (105).

2. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, The electrode assembly includes a reference electrode (301), a second wire (302), an auxiliary electrode (303), a third wire (304), and a seal (305). The reference electrode (301) is installed at the middle of the bottom of the turntable (105), and the bottom of the reference electrode (301) extends outside the turntable (105). The top of the reference electrode (301) is connected to the bottom of the second wire (302). The top of the second wire (302) passes through the interior of the hollow rotating shaft (104), and the top of the second wire (302) is connected to the electrochemical workstation (107) through an electromagnetic slip ring (203). The auxiliary electrode (303) is installed on the inner wall of the pressure tank (101), and the auxiliary electrode (303) is connected to the electrochemical workstation (107) through the third wire (304). The seal (305) is located at the junction of the third wire (304) and the pressure tank (101).

3. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, The cooling device includes a water chiller (401) and a heat exchange tube (402). Both ends of the heat exchange tube (402) are connected to the water chiller (401), and the middle part of the heat exchange tube (402) is coiled on the inner wall of the pressure tank (101).

4. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, It also includes a baffle (601), which is installed on the inner wall of the pressure tank (101).

5. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, It also includes a console (701), which is connected to the motor (103).

6. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, The pressure tank (101) is equipped with a temperature controller. One end of the temperature sensor of the temperature controller is equipped with two temperature sensing electrodes, which are located on the inner and outer sides of the pressure tank (101) respectively. The other end of the temperature controller is connected to the water chiller (401).

7. The in-situ electrochemical testing apparatus for simulating deep-sea environment erosion corrosion by flowing seawater as described in claim 1, characterized in that, The outer wall of the pressure tank (101) is provided with a polyurethane foam insulation layer.

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