Device and method for realizing uniform electroplating of inner wall of slender pipe

Abstract

The invention discloses a device and method for achieving uniform electroplating of the inner wall of a slender pipe, the device comprises a direct current power source, the slender pipe, an anode, an electrolyte circulating system and a rotating system, the slender pipe is connected with the negative electrode of the power source through a rotating conductive slip ring and is driven by an electric rotating table to rotate at a constant speed of 50-300 r / min in the axial direction; the anode is accurately fixed in the center of the tube core through a polytetrafluoroethylene clamp, and the electrolyte is driven by a peristaltic pump to circularly flow at the flow speed of 400-600r / min. Through the synergistic effect of rotation of the slender pipe and centering positioning of the anode, the three technical problems of uneven electrolyte mass transfer, hydrogen bubble retention and radial thickness difference caused by anode eccentricity existing in electroplating of the inner wall of the slender pipe with the high depth-diameter ratio (larger than or equal to 50: 1) are effectively solved. The method is particularly suitable for preparing functional plating layers of precise pipe fittings such as aviation fuel pipes and nuclear fuel cladding pipes with the inner diameters smaller than 10 mm, and high-uniformity plating layers with the radial thickness deviation smaller than 2 micrometers are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electroplating, in particular, to a device and method for uniform electroplating on the inner wall of a high aspect ratio elongated tube (aspect ratio ≥ 50:1), which is suitable for the preparation of functional coatings on precision tubes such as fuel pipes of aero-engine, nuclear fuel cladding tubes, catheters of medical devices, etc. BACKGROUND

[0002] Elongated tubes (aspect ratio ≥ 50:1) are widely used in key components such as fuel pipes of aero-engine, nuclear fuel cladding tubes, hydraulic transmission pipes, catheters of medical devices, and flow channels of precision instruments. These workpieces usually need to deposit functional coatings (such as wear-resistant, corrosion-resistant, radiation damage-resistant, conductive or antibacterial coatings) on their inner walls to meet the performance requirements under specific working conditions. However, due to the particularity of the structure of the elongated tube, the uniformity of the inner wall coating cannot be guaranteed by traditional electroplating methods, mainly due to the following technical bottlenecks:

[0003] 1. Difficult solution mass transfer: the fluid in the tube is prone to form a dead zone, and the metal ion supply is insufficient, resulting in a lower thickness in this area than in other parts of the elongated tube.

[0004] 2. Hydrogen bubble retention: the gas bubbles generated by the hydrogen evolution reaction adhere to the tube wall and are not evenly distributed in the tube, easily accumulating in the upper part of the elongated tube, hindering the deposition of metal ions, and ultimately causing significant differences in coating thickness.

[0005] 3. Anode eccentricity causing large radial thickness difference of the coating: the diameter of the elongated tube is generally small, and a small eccentricity of the anode will cause a significant difference in distance from the two sides of the tube wall. The difference in distance between the cathode and the anode will change the growth rate of the coating, ultimately resulting in non-uniformity of the coating along the radial direction, leading to difficulties in feeding the material in the tube (such as propelling nuclear fuel in the cladding tube).

[0006] The existing technical solutions mainly use electrolyte flowing in the tube for electroplating to solve the problems of mass transfer difficulty and hydrogen bubble retention. For example, the Chinese patent document with publication number CN116623258A discloses a process and device for flow plating chromium in the inner hole of an elongated tube. The device includes a liquid tank, a water pump, a multi-way electromagnetic ball valve, an electromagnetic flowmeter, an upper mold tool, a lower mold tool, an anode steel wire, a solution pipeline, a pure water injection pipe, and a recovery tank. The electroplating is carried out in a flowing manner, which solves the problems of solution mass transfer difficulty and hydrogen bubble retention, and to some extent improves the uniformity of the overall coating thickness of the tube wall. However, it still cannot solve the radial thickness difference of the coating caused by the anode eccentricity. Especially for elongated tubes with an inner diameter less than 10 mm and an aspect ratio greater than 50, a small amount of eccentricity will cause a significant difference in coating thickness. Therefore, the existing electroplating technology for the inner wall of the elongated tube still cannot guarantee the uniformity of the coating thickness in the radial direction. SUMMARY

[0007] In view of the defects in the prior art, the present application provides a device and method for realizing uniform electroplating of the inner wall of an elongated tube, which is composed of a polytetrafluoroethylene clamp, a sealed bearing, an electric rotating table, and a conductive slip ring, and realizes uniform rotation of the elongated tube during electroplating, thereby avoiding local accumulation of hydrogen bubbles on the tube wall and solving the thickness difference in the radial direction of the tube wall caused by anode eccentricity. The conductive slip ring solves the problem of wire entanglement during rotation, and the peristaltic pump controls the circulation rate of the electrolyte, taking into account the electroplating efficiency and electrolyte circulation and replenishment.

[0008] The present application is realized by the following technical solutions:

[0009] A device for realizing uniform electroplating of the inner wall of an elongated tube comprises a direct-current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant-temperature table, a peristaltic pump, an acid- and alkali-resistant hose, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealed bearing, a polytetrafluoroethylene sleeve, an electric rotating table, and a rotating conductive slip ring. The elongated tube is sleeved into the rotating conductive slip ring, and the rotating conductive slip ring is connected to the negative electrode of the power supply. The two side ports of the elongated tube are wrapped with the polytetrafluoroethylene sleeve and inserted into the sealed bearing, the sealed bearing is assembled into one end of the opening side of the polytetrafluoroethylene clamp, and the polytetrafluoroethylene clamp is limited on the fixing frame, so that the polytetrafluoroethylene clamp can be fixed while the elongated tube rotates. The other end of the opening side of the polytetrafluoroethylene clamp is connected to the acid- and alkali-resistant hose, so as to ensure the circulation of the electrolyte in the elongated tube. The anode is connected to the positive electrode of the power supply, the anode rod is arranged at the axial position of the elongated tube, and the polytetrafluoroethylene clamp is closed in the opposite direction along the elongated tube. The elongated tube and the anode are assembled together through the polytetrafluoroethylene clamp to form an electrolysis system. The polytetrafluoroethylene clamp inlet, the clamp outlet, the electrolyte tank inlet, the electrolyte tank outlet, the peristaltic pump inlet, and the peristaltic pump outlet are sequentially connected by the hose, so as to realize the flow circulation and supply of the electrolyte.

[0010] The electrolyte tank is arranged on the constant-temperature table to ensure the constant temperature of the electrolyte. The peristaltic pump drives the electrolyte to flow in the hose and fill the elongated tube, and finally flow back to the electrolyte tank. The electric rotating table holds the elongated tube and drives the elongated tube to rotate at a constant speed along the axial direction under the drive of the motor.

[0011] When the conductive slip ring is assembled with the elongated tube, it should be sleeved at a position 1 / 3-1 / 2 of the length of the elongated tube away from the port of the elongated tube. The electric rotating table should hold the elongated tube to ensure the stability of the elongated tube during rotation. Preferably, the electric rotating table should hold the elongated tube at the central position to ensure the stability of the elongated tube during rotation.

[0012] The two side ports of the elongated tube are wrapped with the polytetrafluoroethylene sleeve and inserted into the sealed bearing to ensure the sealing of the assembly of the elongated tube and the sealed bearing, and to avoid current conduction into the sealed bearing during electroplating.

[0013] The polytetrafluoroethylene clamp is fixed on the fixed frame, and one end of the opening side is connected with the elongated tube through a sealing bearing, so that the polytetrafluoroethylene clamp is fixed and the elongated tube is rotated. The other end of the opening side of the polytetrafluoroethylene clamp is connected with the acid and alkali resistant hose, so as to ensure the circulation flow of the electrolyte in the elongated tube.

[0014] The polytetrafluoroethylene clamp is closed at the opposite end of the elongated tube, and a hole is opened at the central position, which is used to pass through the anode rod and is located on the axis of the elongated tube.

[0015] The anode rod can be selected according to the need, and the insoluble anode or the plated metal anode is fixed through the sealing ring at the opening of the polytetrafluoroethylene clamp, so as to prevent the electrolyte from flowing out.

[0016] The electrolyte enters from the upper end of the electrolyte tank and flows out from the lower end, so as to ensure that the hydrogen bubbles escape as quickly as possible.

[0017] The flow of the peristaltic pump can be continuously adjusted.

[0018] The diameter of the acid and alkali resistant hose is determined according to the size of the port of the polytetrafluoroethylene clamp, the size of the inlet / outlet of the electrolyte tank and the size of the inlet / outlet of the peristaltic pump, so as to ensure the airtightness during the circulation of the electrolyte.

[0019] A method for realizing uniform electroplating of the inner wall of an elongated tube, applied to the above-mentioned electroplating device, comprising the following steps:

[0020] Step one: configure the electrolyte, and adjust the temperature of the constant temperature table according to the process parameters of the electroplated coating, so that the plating solution is maintained at a constant temperature;

[0021] Step two: the inner wall of the elongated tube sequentially passes through alkali washing to remove oil, acid washing to remove rust and pure water cleaning, then passes through the hole of the electric rotating table and is sleeved into the rotating conductive slip ring;

[0022] Step three: the polytetrafluoroethylene sleeve is sleeved on both ends of the elongated tube, then is assembled into the sealing bearing, the sealing bearing and the polytetrafluoroethylene clamp are assembled, and finally are fixed on the fixed support;

[0023] Step four: select the anode required for electroplating, insert it from one side of the polytetrafluoroethylene clamp hole, and pass it out from the other side hole, and seal the hole with a sealing ring to prevent the electrolyte from flowing out;

[0024] Step five: connect the polytetrafluoroethylene clamp inlet, the electrolyte tank inlet and the peristaltic pump inlet with the acid and alkali resistant hose, form an electrolyte circulation loop, start the peristaltic pump, and adjust the speed to 400-600 r / min.

[0025] Step six: connect the positive pole of the power supply with the anode by wire, connect the negative pole of the power supply with the rotating conductive slip ring, adjust the rotating speed of the electric rotating table to 50-300r / min, and open the power supply, adjust the current value and the electroplating time to electroplate.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. By the electric rotating table and the rotating conductive slip ring, the axial rotation in the electroplating process of the elongated tube is realized, which not only inhibits the attachment of hydrogen bubbles on the tube wall, accelerates the mass transfer, but more importantly, avoids the change of the distance between the anode and the cathode caused by the deviation of the anode from the axis of the elongated tube, and can significantly improve the uniformity of the plating layer in the radial thickness.

[0028] 2. By the peristaltic pump, the electrolyte is driven to flow in the elongated tube, the concentration polarization is reduced, the hydrogen gas is quickly discharged, the plating layer defects are inhibited, and the thickness uniformity is improved.

[0029] 3. The elongated tube is placed horizontally, which can effectively eliminate the temperature gradient caused by thermal convection when arranged vertically. In the vertical state, the temperature at the upper part of the tube body is usually higher than that at the lower part, which leads to uneven distribution of current density in the electroplating process, and further affects the plating layer deposition rate and uniformity. Horizontal placement can reduce such thermal convection effect, so that the entire elongated tube is in a more stable temperature field, thereby ensuring consistent plating layer growth rate, and the difference in plating layer thickness can be controlled within 2μm.

[0030] Other beneficial effects of the present application will be described in the specific embodiments through the introduction of specific technical features and technical solutions, and those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through the introduction of the technical features and technical solutions. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the device of the present application.

[0032] Figure 2 It is a side view of the polytetrafluoroethylene clamp in the device of the present application.

[0033] Figure 3 It is a graph of experimental results in the embodiment of the present application.

[0034] Among them, 1 is a direct current power supply, 2 is a wire, 3 is an elongated tube, 4 is an anode, 5 is an electrolyte tank, 6 is a constant temperature table, 7 is a peristaltic pump, 8 is an acid and alkali resistant hose, 9 is a polytetrafluoroethylene clamp, 10 is a sealing ring, 11 is a fixing frame, 12 is a sealing bearing, 13 is a polytetrafluoroethylene sleeve, 14 is an electric rotating table, and 15 is a rotating conductive slip ring.

[0035] For those of ordinary skill in the art, other related drawings can be obtained from the above drawings without creative labor. DETAILED DESCRIPTION

[0036] The application will be described in detail below with specific examples. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the application, a number of changes and improvements can be made. These are within the scope of the application.

[0037] Embodiment

[0038] A device for realizing uniform electroplating of the inner wall of an elongated tube, comprising: a direct current power supply 1, a wire 2, an elongated tube 3, an anode 4, an electrolyte tank 5, a constant temperature table 6, a peristaltic pump 7, an acid and alkali resistant hose 8, a polytetrafluoroethylene clamp 9, a sealing ring 10, a fixing frame 11, a sealing bearing 12, a polytetrafluoroethylene sleeve 13, an electric rotary table 14, and a rotating conductive slip ring 15.

[0039] The elongated tube 3 is connected with the rotating conductive slip ring 14 and connected to the negative electrode of the power supply 1, and the anode 4 is connected to the positive electrode of the power supply 1. The electrolyte tank 5 is placed on the constant temperature table 6 to ensure that the electrolyte temperature is constant. The peristaltic pump 7 drives the electrolyte to flow in the hose 8 and fill the elongated tube 3, and finally flow back to the electrolyte tank 5. The electric rotary table 14 holds the elongated tube 3 and makes the elongated tube 3 rotate at a constant speed along the axial direction under the drive of the motor.

[0040] When the conductive slip ring 15 is assembled with the elongated tube 3, it is sleeved at a position 1 / 3 of the tube length away from the port of the elongated tube 3. The electric rotary table 14 is held at the center position of the elongated tube 3 to ensure the stability of the elongated tube 3 when it rotates.

[0041] The two side ports of the elongated tube 3 are wrapped by the polytetrafluoroethylene sleeve 13 and inserted into the sealing bearing 12 to ensure the sealing when the elongated tube 3 is assembled with the sealing bearing 12, and to avoid current conduction to the sealing bearing 12 during electroplating.

[0042] The polytetrafluoroethylene clamp 9 is fixed on the fixing frame 11, one end of the open side is connected with the elongated tube 3 through the sealing bearing 12 to realize the rotation of the elongated tube 3 while the polytetrafluoroethylene clamp 9 is fixed. The other end of the open side of the polytetrafluoroethylene clamp 9 is connected with the acid and alkali resistant hose 8 to ensure the circulation of the electrolyte in the elongated tube 3.

[0043] The polytetrafluoroethylene clamp 9 is closed at the opposite end of the elongated tube and has a hole at the center position for inserting the anode 4 and placing it at the axial position of the elongated tube 3.

[0044] The anode 4 is selected as insoluble anode, which is iridium-tantalum alloy plated on the surface of titanium rod, fixed by sealing ring 10 at the opening of polytetrafluoroethylene clamp 9 to prevent the electrolyte from flowing out.

[0045] The electrolyte enters from the upper end of electrolyte tank 5 and flows out from the lower end to ensure that hydrogen bubbles escape as quickly as possible.

[0046] The flow of peristaltic pump 7 can be continuously adjusted.

[0047] The diameter of acid and alkali resistant hose 8 is determined according to the size of the port of polytetrafluoroethylene clamp 9, the size of the inlet / outlet of electrolyte tank 5 and the size of the inlet / outlet of peristaltic pump 7 to ensure the airtightness during the circulation of electrolyte.

[0048] A method for uniformly electroplating the inner wall of an elongated tube, applied to the above-mentioned electroplating device, comprising the following steps:

[0049] Step one: configure chrome plating electrolyte, adjust the temperature of the constant temperature table to 70℃, and maintain the plating solution at 70±2℃;

[0050] Step two: the inner wall of the elongated tube with an inner diameter of 8mm and a length of 600mm is sequentially subjected to alkali washing to remove oil, acid washing to remove rust, and pure water cleaning, then is inserted into the hole of the electric rotating table and held at the center position of the elongated tube, then is sleeved into the rotating conductive slip ring, and the slip ring is fixed at a position about 1 / 3 of the tube length away from the port of the elongated tube;

[0051] Step three: the sleeve part in the polytetrafluoroethylene clamp is first sleeved into the elongated tube at both ends, then is inserted into the sealing bearing, and finally the bearing is installed into the polytetrafluoroethylene clamp and fixed on the fixed support;

[0052] Step four: the titanium rod plated with iridium-tantalum alloy on the surface is used as anode, inserted from one side of the hole of the polytetrafluoroethylene clamp and taken out from the other side, and the hole is closed by sealing ring;

[0053] Step five: connect the inlet of the polytetrafluoroethylene clamp, the inlet of the electrolyte tank and the inlet of the peristaltic pump with acid and alkali resistant hose to form an electrolyte circulation loop, start the peristaltic pump, and adjust the rotating speed to 400r / min;

[0054] Step six: connect the positive pole of the power supply with the anode by wire, connect the negative pole of the power supply with the rotating conductive slip ring, adjust the rotating speed of the electric rotating table to 120r / min, turn on the power supply, and use the milky white chrome plating current density value to electroplate for 40min.

[0055] The test results of the plated layer after the inner wall of the elongated tube is uniformly electroplated are provided in this embodiment, and the thickness and density of the plated layer can be observed by scanning electron microscope, such as Figure 3As shown, the plating layer is flat and dense without pinhole defects, and the thickness of the plating layer along the radial direction is 15-17 μm. Therefore, the fluctuation of the plating layer thickness on the inner wall of the elongated tube can be controlled within ±2 μm, and the plating layer has excellent thickness uniformity.

[0056] It should be noted that in the embodiment, the rotation speed of the peristaltic pump is any value in the range of 400-600 r / min, and the rotation speed of the electric rotary table is any value in the range of 50-300 r / min, and the fluctuation of the plating layer thickness can be within ±2 μm. Exceeding the upper limit of the rotation speed will result in slow growth of the plating layer, or even the plating layer cannot be formed; and being lower than the lower limit of the rotation speed will easily result in poor thickness uniformity of the plating layer.

[0057] The device and method for realizing uniform electroplating on the inner wall of the elongated tube provided by the application include a direct current power supply, an elongated tube, an anode, an electrolyte circulation system and a rotating system, wherein the elongated tube is connected to the negative pole of the power supply through a rotating conductive slip ring and rotates at a uniform speed of 50-300 r / min along the axial direction under the driving of the electric rotary table, the anode is accurately fixed in the center of the tube through a polytetrafluoroethylene clamp, and the electrolyte is circulated and flows at a flow rate of 400-600 r / min under the driving of the peristaltic pump. The synergistic effect of the rotation of the elongated tube and the accurate centering of the anode effectively solves the three technical problems existing in the electroplating on the inner wall of the elongated tube with a high depth-diameter ratio (≥50:1), i.e., uneven mass transfer of the electrolyte, retention of hydrogen bubbles and radial thickness difference caused by anode eccentricity. The device is particularly suitable for functional plating layer preparation of precision pipe fittings such as aviation fuel pipes and nuclear fuel cladding tubes with an inner diameter of less than 10 mm, and realizes a high-uniformity plating layer with a radial thickness deviation of less than 2 μm.

[0058] The specific embodiments of the application are described above. It should be understood that the application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which do not affect the essential content of the application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A device for achieving uniform electroplating of the inner wall of an elongated tube, characterized in that, The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring.

2. The apparatus for achieving uniform plating of the inner wall of an elongated tube according to claim 1, wherein The elongated tube is sleeved into the rotary electrically conductive slip ring, and the rotary electrically conductive slip ring is connected to the negative electrode of the power supply.

3. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein The two side ports of the elongated tube are wrapped by the polytetrafluoroethylene sleeve and are inserted into the sealing bearing.

4. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein The sealing bearing is assembled into one end of the opening side of the polytetrafluoroethylene clamp and limits the polytetrafluoroethylene clamp on the fixing frame, so that the polytetrafluoroethylene clamp can be fixed while the elongated tube rotates.

5. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein The other end of the opening side of the polytetrafluoroethylene clamp is connected to the acid and alkali resistant hoses, so as to ensure the circulation of the electrolyte in the elongated tube.

6. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein The anode is connected to the positive electrode of the power supply, and the anode rod is arranged at the axial position of the elongated tube and is sealed in the opposite direction of the elongated tube through the polytetrafluoroethylene clamp.

7. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein the polytetrafluoroethylene is Teflon®. The elongated tube and the anode are assembled together through the polytetrafluoroethylene clamp to form an electrolytic system.

8. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein, The polytetrafluoroethylene clamp inlet, the polytetrafluoroethylene clamp outlet, the electrolyte tank inlet, the electrolyte tank outlet, the peristaltic pump inlet and the peristaltic pump outlet are sequentially connected through the hoses to realize the circulation of the electrolyte.

9. The apparatus for achieving uniform plating of the inner wall of an elongated tube as claimed in claim 1, wherein, The electrolyte tank is arranged on the constant temperature table to ensure the constant temperature of the electrolyte.

10. A method for uniformly plating the inner wall of an elongated tube using the apparatus of claim 1, characterized by, The peristaltic pump drives the electrolyte to flow in the hoses and fill the elongated tube, and finally flows back to the electrolyte tank. The electric rotary table holds the elongated tube and drives the elongated tube to rotate at a constant speed along the axial direction under the drive of the motor. When the electrically conductive slip ring is assembled with the elongated tube, it should be sleeved at a position 1 / 3-1 / 2 of the length of the elongated tube away from the port of the elongated tube. The electric rotary table should hold the elongated tube to ensure the stability of the elongated tube during rotation. The two side ports of the elongated tube are wrapped by the polytetrafluoroethylene sleeve and are inserted into the sealing bearing to ensure the sealing of the elongated tube and the sealing bearing during assembly. The clamp is fixed on the fixing frame, one end of the opening side of the clamp is connected to the elongated tube through the sealing bearing, and the polytetrafluoroethylene clamp is fixed while the elongated tube rotates. The other end of the opening side of the polytetrafluoroethylene clamp is connected to the acid and alkali resistant hoses to ensure the circulation of the electrolyte in the elongated tube. The polytetrafluoroethylene clamp is sealed in the opposite direction of the elongated tube and has a hole at the central position to pass through the anode rod and arrange the anode rod at the axial position of the elongated tube. The anode rod is selected according to the need, which can be an insoluble anode or a plated metal anode, and is fixed at the opening of the polytetrafluoroethylene clamp through the sealing ring to prevent the electrolyte from flowing out. The electrolyte enters from the upper end of the electrolyte tank and flows out from the lower end to ensure that the hydrogen bubbles escape as quickly as possible. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic pump, acid and alkali resistant hoses, a polytetrafluoroethylene clamp, a sealing ring, a fixing frame, a sealing bearing, a polytetrafluoroethylene sleeve, an electric rotary table and a rotary electrically conductive slip ring. The utility model relates to an electrolytic system, which comprises a direct current power supply, a wire, an elongated tube, an anode, an electrolyte tank, a constant temperature table, a peristaltic Step four: select the required anode plating, from one side of the polytetrafluoroethylene fixture hole insertion, and from the other side of the hole, the hole is sealed with a sealing ring to prevent the electrolyte from flowing out; Step five: connect the polytetrafluoroethylene fixture inlet, the electrolyte tank inlet, and the peristaltic pump inlet with acid and alkali resistant hoses to form an electrolyte circulation loop, start the peristaltic pump, and adjust the speed to 400-600 r / min; Step six: connect the positive electrode of the power supply to the anode with a wire, connect the negative electrode of the power supply to the rotating conductive slip ring, adjust the speed of the electric rotating table to 50-300 r / min, turn on the power supply, and adjust the current value and plating time for plating.

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