Acid zinc-nickel electroplating reaction device
By using a semi-permeable membrane to separate the anolyte from the plating solution in an acidic zinc-nickel electroplating apparatus, the problem of the black film on the zinc anode surface was solved, achieving a high-efficiency and low-cost electroplating process.
Patent Information
- Application Number
- CN202422663092.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-01
AI Technical Summary
During acidic zinc-nickel electroplating, a black film is easily formed on the surface of the zinc anode, which affects the dissolution of zinc and the electroplating tank pressure, thus affecting the thickness and appearance of the electroplated layer.
An acidic zinc-nickel electroplating reaction device is used, including an electroplating tank, multiple anode rods, and a semi-permeable membrane. The semi-permeable membrane isolates the anolyte from the electroplating solution to prevent the zinc ions from replacing the nickel ions. The electrolysis process is optimized through an anolyte management module.
It effectively avoids the formation of a black film on the zinc anode surface, improves electroplating efficiency, reduces electroplating costs, and maintains the continuity and stability of the electroplating process.
Smart Images
Figure CN223561729U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to workpiece electroplating technical field, concretely relates to an acid zinc nickel electroplating reaction device. BACKGROUND
[0002] With the popularity of disc brake, the demand of caliper body (especially the caliper body using zinc nickel plating layer) is also increasing. Since the caliper body substrate is cast iron, it cannot directly obtain zinc nickel plating layer through alkaline zinc nickel electroplating, and the traditional process is to first use acid zinc plating to plate a layer of acid zinc on the surface of the cast iron, and then electroplate alkaline zinc nickel on the surface of the acid zinc plating layer to obtain the zinc nickel plating layer. The above process flow is long and low in efficiency.
[0003] Therefore, the acid zinc nickel process is currently used to replace the above alkaline zinc nickel electroplating process, so that it can directly electroplate on the cast iron substrate to obtain the zinc nickel plating layer. However, in the application of the acid zinc nickel process, the zinc anode is easily affected by the nickel ions in the tank solution, thereby producing a zinc-nickel displacement reaction, and after power-on, a black film is generated on the surface of the zinc anode, thereby affecting the dissolution of zinc and increasing the pressure of the electroplating tank, so that the thickness and appearance of the zinc nickel plating layer are affected. SUMMARY
[0004] The utility model provides a kind of acid zinc nickel electroplating reaction device to solve the problem that zinc anode surface is prone to produce black film and hinder zinc dissolution in prior art during acid zinc nickel electroplating.
[0005] To solve the above technical problems, the utility model adopts the technical scheme of providing an acid zinc nickel electroplating reaction device, which comprises an electroplating tank, a plurality of anode rods and a semi-permeable membrane.
[0006] The electroplating tank can hold electroplating solution; the plurality of anode rods are located in the electroplating tank and can be at least partially immersed in the electroplating solution, wherein the anode rod has a containing space that can pass through the anode liquid, and the containing space is also provided with a zinc anode immersed in the anode liquid.
[0007] The semi-permeable membrane is covered on the outside of the anode rod and is used to isolate the anode liquid from the electroplating solution, wherein the semi-permeable membrane can permeate zinc ions in the anode liquid and isolate nickel ions in the electroplating solution.
[0008] The technical scheme provided by the utility model has the beneficial effects compared with the prior art:
[0009] By adding a semi-permeable membrane outside the anode rod, the anolyte in the internal accommodation space of the anode rod is effectively isolated from the electroplating solution in the electroplating tank, thereby avoiding the displacement reaction between zinc ions in the anolyte and nickel ions in the electroplating solution. The zinc anode in the anode rod is immersed in the anolyte, so that the zinc ions dissolve in the anolyte, and the zinc ions in the anolyte can also penetrate into the electroplating solution through the semi-permeable membrane, so as to avoid the influence of zinc ion concentration on zinc dissolution and to supplement the zinc ions consumed in the electroplating process in the electroplating solution.
[0010] In addition, the nickel ions in the electroplating solution cannot penetrate into the anolyte through the semi-permeable membrane, effectively avoiding the phenomenon of black film on the surface of the zinc anode. Compared with the current methods of activating the zinc anode or removing the zinc anode when stopping the electroplating work, or frequently replacing the zinc anode, the added semi-permeable membrane can effectively improve the electroplating efficiency while reducing the cost of the electroplating process.
[0011] In some embodiments, the acidic zinc-nickel electroplating reaction device further comprises an anolyte management module having an anolyte management tank and an anolyte circulation pipeline in communication with the anode rod and the anolyte management tank, respectively, to form a flow circulation loop of the anolyte.
[0012] By using the above technical solution, the anolyte can flow through the anolyte circulation pipeline by the anolyte management module, and the anolyte can be treated by the anolyte management tank, including adjusting the pH value, reducing impurities, etc., to optimize the electrolysis process and further improve the electroplating efficiency.
[0013] In some embodiments, the anolyte circulation pipeline further comprises a plurality of flow meters corresponding to the anode rods and used to adjust the flow rate of the anolyte of the anode rods.
[0014] By using the above technical solution, the flow meter is used to measure the flow rate of the anolyte in the anolyte circulation pipeline, which corresponds to the anode rod to accurately monitor the flow rate of each anode unit (i.e. anode rod), facilitating the maintenance of the entire electroplating reaction device.
[0015] In some embodiments, the anode rod further comprises a flow limiting hole in communication with the accommodation space and penetrating through the semi-permeable membrane, wherein the anolyte circulation pipeline further comprises an anolyte inlet pipe in communication with the flow limiting hole, so that the flow limiting hole can limit the flow rate of the anolyte flowing into the accommodation space.
[0016] By setting the flow limiting hole on the anode stick, the flow meter is not needed to be set, and the circulation of the anode liquid can be effectively maintained while the flow size of the anode liquid in the anode stick is controlled.
[0017] In some embodiments, the anode stick is further provided with an overflow hole in communication with the accommodation space, wherein the anode liquid circulation pipeline further comprises an anode liquid outlet pipe in communication with the overflow hole.
[0018] By the overflow hole, the anode liquid outlet process is realized, so that the liquid level height of the anode liquid in the accommodation space can be effectively controlled, and the liquid level is prevented from being too high or too low, and the working energy consumption of the circulation pump is further reduced.
[0019] In some embodiments, the anode liquid management module further comprises a pump body connected with the anode liquid circulation pipeline and the anode liquid management tank respectively.
[0020] In some embodiments, the semi-permeable membrane is a ceramic membrane or an organic membrane.
[0021] When the material of the semi-permeable membrane is ceramic, the diffusion of zinc ions in the anode liquid into the electroplating liquid can be limited, so that the zinc ion concentration in the anode liquid is increased, and the anode liquid is diluted periodically.
[0022] In some embodiments, the anode liquid is zinc chloride.
[0023] In some embodiments, the anode liquid circulation pipeline is further provided with a flow regulating valve and an anode liquid inlet pipe, and the flow regulating valve is located on the anode liquid inlet pipe and corresponds to the anode stick one by one.
[0024] By the above technical solution, the flow regulating valve is matched with the flow limiting hole or the flow meter to realize the accurate control and monitoring of the anode liquid in the anode liquid circulation pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.
[0026] Figure 1 is a stereoscopic structure schematic diagram of one embodiment of the acid zinc nickel electroplating reaction device provided by the utility model;
[0027] Figure 2 is a sectional view of one embodiment of the anode rod of the acid zinc nickel electroplating reaction device provided by the utility model;
[0028] Figure 3 is a connection diagram of one embodiment of the acid zinc nickel electroplating reaction device provided by the utility model Figure 1 ;
[0029] Figure 4 is a connection diagram of one embodiment of the acid zinc nickel electroplating reaction device provided by the utility model Figure 2 ;
[0030] Figure 5 is a sectional view of one embodiment of the anode rod of the acid zinc nickel electroplating reaction device provided by the utility model.
[0031] In the drawing:
[0032] Electroplating tank - 10; Electroplating solution - 11; Anode rod - 20; Containing space - 21; Anode solution - 22; Zinc anode - 23; Flow limiting hole - 24; Overflow hole - 25; Semi-permeable membrane - 30;
[0033] Anode solution management module - 40; Anode solution management tank - 41; Anode solution circulating pipeline - 42; Flow meter - 420; Anode solution inlet pipe - 421; Anode solution outlet pipe - 422; Flow regulating valve - 423; Pump body - 43; To be electroplated workpiece - 50. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.
[0035] Referring to Figures 1 to 2 , the utility model discloses a kind of acid zinc nickel electroplating reaction device, as shown in the stereoscopic structure schematic diagram of one embodiment of the acid zinc nickel electroplating reaction device provided by the utility model; Figure 1 As shown in the sectional view of one embodiment of the anode rod 20 of the acid zinc nickel electroplating reaction device provided by the utility model. Figure 2
[0036] In some embodiments, the acidic zinc-nickel electroplating reaction device comprises an electroplating tank 10, a plurality of anode rods 20, and a semi-permeable membrane 30.
[0037] The electroplating tank 10 can contain an electroplating solution 11; the plurality of anode rods 20 are located in the electroplating tank 10 and can be at least partially immersed in the electroplating solution 11, wherein the anode rod 20 has a containing space 21 in which an anode liquid 22 can flow, and the containing space 21 is further provided with a zinc anode 23 immersed in the anode liquid 22. The semi-permeable membrane 30 is arranged on the outer side of the anode rod 20 and is used to separate the anode liquid 22 from the electroplating solution 11, wherein the semi-permeable membrane 30 can permeate zinc ions in the anode liquid 22 and separate nickel ions in the electroplating solution 11.
[0038] In the embodiments of the present application, a layer of semi-permeable membrane 30 is added on the outer side of the anode rod 20, thereby effectively separating the anode liquid 22 in the containing space 21 of the anode rod 20 from the electroplating solution 11 in the electroplating tank 10, and thereby avoiding the displacement reaction between the zinc ions in the anode liquid 22 and the nickel ions in the electroplating solution 11. Specifically, the zinc anode 23 in the anode rod 20 is immersed in the anode liquid 22. Exemplarily, the anode liquid 22 is a zinc chloride solution, and the concentration thereof is generally about 205 g / L. In the electrolytic reaction, the zinc ions in the anode liquid 22 continuously permeate into the electroplating solution 11 through the semi-permeable membrane 30, and at the same time, the zinc of the zinc anode 23 dissolves, so that the anode liquid 22 can maintain a relatively stable zinc ion concentration.
[0039] In some application scenarios, the semi-permeable membrane 30 can be a ceramic membrane or an organic membrane. For example, when the material of the semi-permeable membrane 30 is ceramic, the diffusion of zinc ions in the anode liquid 22 into the electroplating solution 11 can be relatively limited, so that the zinc ions in the anode liquid 22 can be accumulated to increase the zinc ion concentration of the anode liquid 22, and the anode liquid 22 can be diluted periodically. When the semi-permeable membrane 30 is an organic membrane, the zinc ions can diffuse into the electroplating solution 11, so that the concentration of the zinc ions in the anode liquid 22 remains stable.
[0040] In addition, since the nickel ions in the electroplating solution 11 cannot permeate into the anode liquid 22 through the semi-permeable membrane 30, while the anode liquid 22 continuously replenishes the zinc ions consumed in the electroplating solution 11, the phenomenon of black film generated on the surface of the zinc anode 23 (i.e., zinc-nickel displacement reaction) is effectively avoided. Compared with the current methods of activating the zinc anode 23 or frequently replacing the zinc anode 23, the addition of the semi-permeable membrane 30 can effectively improve the electroplating efficiency while reducing the cost of the electroplating process, and maintain the continuity of the electroplating process.
[0041] Exemplarily, the electroplating tank 10 is further provided with a workpiece 50 to be electroplated, which is located between two adjacent anode rods 20 to serve as a negative electrode in the electroplating tank 10 to complete the electroplating process.
[0042] In combinationFigure 3 and Figure 4 as shown in FIG. 1, Figure 3 FIG. 1 shows a connection diagram of an embodiment of an acidic zinc-nickel electroplating reaction device provided by the present application; Figure 1 ; Figure 4 FIG. 1 shows a connection diagram of an embodiment of an acidic zinc-nickel electroplating reaction device provided by the present application; Figure 2 .
[0043] In some embodiments, the acidic zinc-nickel electroplating reaction device further comprises an anolyte management module 40 having an anolyte management tank 41 and an anolyte circulation pipeline 42, which are respectively in communication with the anode rods 20 and the anolyte management tank 41 to form a flow circulation loop of the anolyte 22.
[0044] In the embodiments of the present application, the anolyte management module 40 is used to enable the anolyte 22 to circulate through the anolyte circulation pipeline 42, and the anolyte 22 is treated by the anolyte management tank 41, including adjusting the pH value, reducing impurities, etc., to optimize the electrolysis process and further improve the electroplating efficiency. For example, the addition of hydrochloric acid in the anolyte management tank 41 enables the pH value of the anolyte 22 to be stabilized at 4.2 to 4.8.
[0045] In some embodiments, the anolyte circulation pipeline 42 further comprises a plurality of flow meters 420, which correspond one-to-one to the anode rods 20 and are used to adjust the flow rate of the anolyte 22 of the anode rods 20.
[0046] In the embodiments of the present application, the flow meters 420 are used to measure the flow rate of the anolyte 22 in the anolyte circulation pipeline 42, which correspond one-to-one to the anode rods 20 to accurately monitor the flow rate of each anode unit (i.e., the anode rod 20) and facilitate the maintenance of the entire electroplating reaction device.
[0047] For example, the anolyte management module 40 further comprises a pump body 43 connected to the anolyte circulation pipeline 42 and the anolyte management tank 41. The pump body 43 is used to realize the circulation of the anolyte 22 in the anolyte circulation pipeline 42. For example, Figure 3 or Figure 4 As shown in FIG. 1, the pump body 43 is a circulation pump located on one side of the anolyte management tank 41, so that the anolyte 22 from the anolyte management tank 41 enters the anolyte inlet pipe 421 via the pump body 43 and flows to each anode rod 20.
[0048] In some embodiments, the anode rod 20 is further provided with a flow limiting hole 24 in communication with the accommodation space 21 and penetrating the semi-permeable membrane 30, wherein the anolyte circulation pipeline 42 further has an anolyte inlet pipe 421 in communication with the flow limiting hole 24, so that the flow limiting hole 24 can limit the flow rate of the anolyte 22 flowing into the accommodation space 21.
[0049] In this embodiment, by providing a flow-limiting hole 24 on the anode rod 20, the flow rate of the anolyte 22 within the anode rod 20 can be controlled while maintaining the circulation of the anolyte 22. Compared to the installation of the flow meter 420 (which requires sufficient installation space), this method combines the inlet pipes corresponding to multiple anode rods 20 into one, thereby saving installation space and effectively improving the space utilization rate inside the electroplating tank 10.
[0050] In some implementations, the anolyte circulation pipe 42 is also provided with a flow regulating valve 423 and an anolyte inlet pipe 421. The flow regulating valve 423 is located in the anolyte inlet pipe 421 and corresponds one-to-one with the anode rod 20.
[0051] In this embodiment, the flow regulating valve 423 cooperates with the flow limiting orifice 24 or the flow meter 420 to achieve precise control and monitoring of the anolyte 22 in the anolyte circulation pipeline 42.
[0052] See Figure 5 As shown, Figure 5 A three-dimensional structural schematic diagram of an embodiment of the anode rod 20 of an acidic zinc-nickel electroplating reaction apparatus provided in this application is shown.
[0053] In some embodiments, the anode rod 20 is also provided with an overflow hole 25, which is connected to the accommodating space 21. The anode liquid circulation pipe 42 also includes an anode liquid outlet pipe 422 connected to the overflow hole 25.
[0054] In this embodiment, the anolyte 22 is discharged through the overflow hole 25, thereby effectively controlling the liquid level of the anolyte 22 in the containment space 21, avoiding it from being too high or too low, and further reducing the working energy consumption of the circulation pump.
[0055] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, should be included within the protection scope of this utility model.
Claims
1. An acidic zinc-nickel electroplating reaction apparatus, characterized in that, The acid zinc-nickel electroplating reaction device comprises an electroplating tank, a plurality of anode rods, and a semi-permeable membrane. The acid zinc-nickel electroplating reaction device further comprises an anode liquid management module. The anode liquid management module comprises an anode liquid management tank and an anode liquid circulation pipeline. The anode liquid circulation pipeline is in communication with the anode rods and the anode liquid management tank.
2. The acidic zinc-nickel electroplating reaction apparatus according to claim 1, characterized by, The anode liquid circulation pipeline further comprises a plurality of flow meters corresponding to the anode rods.
3. The acidic zinc-nickel electroplating reaction apparatus according to claim 2, characterized by The anode rods are provided with flow-limiting holes in communication with the accommodation spaces and penetrating through the semi-permeable membrane.
4. The acidic zinc-nickel electroplating reaction apparatus according to claim 2, wherein The anode liquid circulation pipeline further comprises an anode liquid inlet pipeline in communication with the flow-limiting holes.
5. The acidic zinc-nickel electroplating reaction apparatus according to claim 2, wherein The anode rods are provided with overflow holes in communication with the accommodation spaces.
6. The acidic zinc-nickel electroplating reaction apparatus according to claim 2, wherein The anode liquid circulation pipeline further comprises an anode liquid outlet pipeline in communication with the overflow holes.
7. The acidic zinc-nickel electroplating reaction apparatus according to claim 1, wherein The anode liquid management module further comprises a pump body connected with the anode liquid circulation pipeline and the anode liquid management tank.
8. The acidic zinc-nickel electroplating reaction apparatus according to claim 1, wherein The semi-permeable membrane is a ceramic membrane or an organic membrane.
9. The acidic zinc-nickel electroplating reaction apparatus according to claim 3 or 4, characterized by The anode liquid is zinc chloride. The anode liquid circulation pipeline is provided with a flow adjusting valve and an anode liquid inlet pipeline. The flow adjusting valve is located in the anode liquid inlet pipeline and corresponds to the anode rods.