Low-power-consumption electrolytic antifouling device for marine unmanned equipment and application method of low-power-consumption electrolytic antifouling device

Abstract

The invention belongs to the technical field of fouling prevention and control, and particularly relates to a low-power-consumption electrolysis anti-fouling device for marine unmanned equipment and an application method of the low-power-consumption electrolysis anti-fouling device. The main body structure of the device comprises a copper composite electrode, a chlorine-producing anode arranged on the periphery of the copper composite electrode and a titanium cathode arranged in the center of the chlorine-producing anode; the application method comprises the following steps: determining the size of a fouling protection space and a maintenance and replacement period, calculating the size of the copper composite electrode and the boundary dimension of the device, arranging the positions of one or more sets of devices according to requirements, connecting the device with the marine unmanned equipment, and carrying out secondary pollution protection on the marine unmanned equipment. Copper ions generated through electrolysis serve as a main antifouling agent, chlorine prepared through seawater electrolysis serves as an auxiliary antifouling agent, the copper ions and hypochlorite are generated through intermittent electrolysis, marine organisms are prevented and treated, through electrode parameter matching, the electrolysis current is effectively reduced, the service life of a copper composite electrode is prolonged, electrolysis power consumption is reduced, and the stable antifouling effect with low power consumption is guaranteed.

Description

Technical fields:

[0001] This invention belongs to the field of antifouling technology, specifically relating to an integrated low-power electrolytic antifouling device and its application method, suitable for semi-open seawater spaces of marine unmanned equipment, using electrolytically generated copper ions as the main antifouling agent and electrolytically generated seawater chlorine as the auxiliary antifouling agent, and having the function of accelerating the release of electrolytic copper products into the environment. Background technology:

[0002] Marine biofouling refers to the phenomenon in the marine environment where various marine organisms attach to and grow on the underwater surfaces of ships, pipes, equipment, etc., increasing ship drag, accelerating surface corrosion, damaging propellers, clogging seawater cooling pipes, etc., leading to additional fuel consumption and excessively high maintenance costs.

[0003] Semi-open seawater space refers to a space within a portion of unmanned equipment that, to reduce the complexity of pressure resistance and sealing, remains connected to external seawater. This creates a seawater-filled space between the internal structure, equipment, and shell, allowing for material exchange with the external seawater. It is used in marine unmanned equipment to replace humans in long-term tasks in marine environments. Because the seawater flow inside marine unmanned equipment is slow, it is highly susceptible to biofouling, which is difficult to address with conventional antifouling coatings.

[0004] Marine unmanned equipment typically employs methods such as seawater electrolysis to produce chlorine and copper electrolysis to generate antifouling ions for fouling protection. For example, Chinese Patent 201910821084.8 discloses a seawater pump turbine unit and its technical pipeline electrolytic antifouling system, including a seawater pretreatment unit, an electrolytic chlorination device, a storage and dosing unit, a monitoring unit, and a power control unit. The unit is equipped with an outlet a, an inlet b, a spiral casing inlet c, and an inlet d. The seawater pretreatment unit includes a technical pipeline end control valve, a seawater collection pipeline, a seawater storage tank, a seawater transfer pump, and a seawater filtration device. The storage and dosing unit includes an antifouling storage tank, a dosing pump, and a dosing pipeline. The monitoring unit includes a seawater storage monitoring device and an antifouling storage device. The power control unit includes a technical pipeline end control valve controller and a seawater... The unit includes a transfer pump controller, an electrolytic chlorination device controller, and a dosing pump controller. The unit's outlet a is connected to the inlet of the seawater storage tank via a technical pipeline and a seawater collection pipeline. The seawater collection pipeline is equipped with a technical pipeline end control valve, which in turn is equipped with a technical pipeline end control valve controller. The seawater storage tank is equipped with a seawater storage level monitoring device. The outlet of the seawater storage tank is connected to the inlet of the sewage storage tank via a pipeline, which is equipped with a seawater transfer pump, a seawater filtration device, and an electrolytic chlorination device. The seawater transfer pump is equipped with a seawater transfer pump controller, the electrolytic chlorination device is equipped with an electrolytic chlorination device controller, and the sewage storage tank is equipped with a sewage storage level monitoring device. Chinese Patent 202310108149.0 discloses a mobile in-situ electrolytic antifouling device for marine steel structures, used for electrolytic antifouling of marine steel structures. The device includes an electrolysis unit, a traction device, a control device, and a level gauge. The electrolysis unit includes an electrolytic cell, which is placed in seawater near the marine steel structure. The electrolytic cell electrolyzes the seawater to generate effective chlorine in the seawater near the marine steel structure, thereby preventing fouling. The traction device is mounted on the marine steel structure and connected to the electrolysis cell, used to move the electrolysis cell up and down. The level gauge is used to detect the level near the marine steel structure. The seawater level is controlled by a control device connected to both a level gauge and a traction device. The control device, based on the seawater level measured by the level gauge, controls the traction device to move the electrolytic cell up and down, ensuring the cell remains submerged in seawater near the marine steel structure. The traction device includes a drive unit and a connecting unit. The drive unit is fixed to the marine steel structure and located above the electrolytic cell. It is connected to the cell via the connecting unit and drives the connecting unit, thus moving the electrolytic cell up and down. The mobile in-situ electrolytic antifouling device for marine steel structures also includes a track for fixing to the structure. However, the aforementioned electrolytic chlorine production antifouling system has relatively high power consumption, requires a high effective chlorine concentration, and produces a large amount of hydrogen gas as a side reaction, making it unsuitable for fouling protection in unmanned, semi-open seawater spaces.

[0005] Chinese Patent 201610693978.X discloses an integrated high-efficiency antifouling electrode for titanium alloy seawater pipelines, comprising a base, a safety cap, a cable connector, an anode conductor, a copper-based composite anode, an aluminum anode, and a cathode. The base is a flange, and the safety cap is connected to the base, forming a wiring cavity between the base and the safety cap. The cable connector extends out from the wiring cavity. The anode conductor is inserted into the base, with one end extending into the wiring cavity and connecting to the cable connector to provide electrolytic current to the copper-based composite anode and the aluminum anode. The other end serves as the outer side of the copper conductor. The copper-based composite anode and aluminum anode are supported, exposing them to the electrolyte. The cathode has a closed ring cross-section, is fixed to the base, and surrounds the copper-based composite anode and aluminum anode. The anode conductor, cathode, and base are insulated and waterproofed. The base, safety cap, cathode, cathode, copper-based composite anode, and aluminum anode are insulated. The anode conductor includes a copper-based composite anode connecting conductive cylinder and an aluminum anode connecting conductive column, which are insulated and waterproofed. Chinese Patent 201610924368.6 discloses an electrolysis device using an electrode assembly in a seawater pipeline. The device includes an electrolysis power supply, a seawater tank, and an electrode assembly. The seawater tank has seawater pipeline interfaces and valves at both ends. The electrode assembly is installed inside the tank, with an even number of electrode rods insulated from each other, divided into two equal groups, and connected to the positive and negative terminals of the electrolysis power supply as the cathode and anode, respectively. The electrolysis power supply mainly consists of a DC constant current power supply and a polarity reversing device, used to provide DC electrolysis current to the electrode assembly and periodically change the polarity of the two groups of electrode rods in the seawater tank to prevent cathode scaling. This patent suffers from high energy consumption and short electrode lifespan, making it unsuitable for use in devices such as filters where electrodes are easily replaced, and thus unsuitable for fouling protection in unmanned, semi-open seawater environments.

[0006] Chinese Patent 202110541987.8 discloses a power-free, long-life, self-driven antifouling device for use in marine seawater tank environments. It consists of an antifouling electrode and a mounting base. The antifouling electrode, as the main functional structure, utilizes the potential difference between dissimilar metals to drive the accelerated dissolution of the cathode plate, generating copper ions at an effective antifouling concentration. The antifouling electrode comprises a cathode metal plate, an anode metal plate, clamping plates, and fasteners. The cathode and anode metal plates are fixed by clamping plates and fasteners at both ends. The number of fasteners depends on the total number of anode and cathode plates, aiming to ensure that each anode and cathode plate is firmly fixed. The cathode metal plate is made of an inert metal material, the anode metal plate is selected from pure copper, red copper, bronze, brass, or copper alloys doped with other metal elements, the clamping plates are made of the same material as the anode metal plate, and the cathode metal plate is selected from titanium alloys, titanium-based platinum oxide, or titanium-based platinum-niobium oxide. However, its antifouling ion release efficiency is low, the release process is unstable, and it is difficult to achieve a stable and reliable long-term antifouling effect.

[0007] In summary, with the increasing application of marine unmanned equipment, there is an urgent need to address the problem of biofouling prevention in semi-open seawater spaces. However, currently, there are no practical and fully functional products specifically designed for this operating environment, and technological accumulation is relatively weak. Therefore, it is necessary to develop and design a low-power electrolytic antifouling device for marine unmanned equipment with stable antifouling effects and long-term service capabilities, as well as its application method. Summary of the Invention:

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies and to develop and design a low-power electrolytic antifouling device for marine unmanned equipment and its application method. By intermittently electrolyzing to generate copper ions and hypochlorite ions, the antifouling effect is ensured to be stable.

[0009] To achieve the above objectives, the main structure of the low-power electrolytic antifouling device for marine unmanned equipment involved in this invention is as follows: Figure 1 As shown, it includes a copper composite electrode and a chlorine-producing anode arranged around it, a titanium cathode arranged in the center of the chlorine-producing anode, and an electrolysis control module connected to the copper composite electrode, the chlorine-producing anode, and the titanium cathode; the bottom of the copper composite electrode, the chlorine-producing anode, and the titanium cathode are arranged on a fixed base, and the top is connected to a sealed junction box. The electrolysis control module is arranged inside the sealed junction box, and the watertight power connector is arranged on the top of the sealed junction box.

[0010] The electrolysis control module involved in this invention is as follows: Figure 2 As shown, it integrates a DC power conversion unit, an output port switching unit, and a measurement control unit, and has one DC input port and three output ports; wherein:

[0011] The DC power conversion unit includes two isolated DC-DC conversion circuits, which convert the DC power supplied by the unmanned equipment, which has a voltage range of 5-100V, into two power supplies with a specified voltage. One supply is to the measurement and control unit, which uses a constant voltage output of 12V; the other supply is to the output port, which uses a voltage-limited and current-limited output mode. The maximum output voltage and maximum output current are determined according to the structural characteristics of the copper composite electrode.

[0012] The output port switching unit includes several solid-state relays. By receiving control signals from the measurement and control unit, it connects the positive and negative terminals of the DC power conversion unit output current to two of the three ports respectively. Through the combination of switches, it switches between three main working states: copper composite electrode as anode and titanium cathode as cathode; copper composite electrode as cathode and chlorine production anode as anode; and chlorine production anode as anode and titanium cathode as cathode.

[0013] The measurement and control unit includes a central processing unit, registers, and a current sensor. When powered on, the central processing unit executes the PLC program stored in the registers and sends action commands to the output port switching unit based on the program running time and the measured output current.

[0014] The copper composite electrode of the present invention is made of copper-based material including copper or copper ions as the main antifouling agent, which is released more rapidly in seawater through anodic polarization, and has the functions of releasing copper ions and antifouling.

[0015] The chlorine-producing anode is made of materials such as titanium-based noble metal oxide anodes (MMO), platinum-titanium plates, and platinum-niobium plates, which undergo chlorine evolution reaction through anodic polarization in seawater. It has the function of producing hypochlorous acid as an antifouling agent and serves as an auxiliary anode during hydrogen evolution in copper composite electrodes.

[0016] The titanium cathode is made of pure titanium metal and serves as an auxiliary cathode during anodic polarization of the copper composite electrode and the chlorine production anode.

[0017] The mounting base is made of engineering plastic and has the functions of support, isolation and protection, which can prevent the copper composite electrode, chlorine anode and titanium cathode from colliding with other structures;

[0018] The sealed junction box is made of engineering plastic and serves to support and protect the electrolysis control module and the watertight power connector.

[0019] The watertight power connector is a commercially available water pressure resistant connector. The model is adjusted to meet the requirements of marine unmanned equipment and serves to connect the power supply.

[0020] The low-power electrolytic antifouling device for marine unmanned equipment involved in this invention has the following three operating states:

[0021] 1) Copper ions are generated by electrolysis using copper composite electrodes.

[0022] A copper composite electrode is used as the anode, and a titanium cathode is used as the cathode;

[0023] Electrolysis of the copper composite electrode mainly generates cuprous ions, which combine with chloride ions in seawater to form cuprous chloride that adheres to the surface of the copper composite electrode.

[0024] Oxygen absorption and hydrogen evolution reactions occur on the surface of the titanium cathode;

[0025] 2) Copper composite electrode hydrogen evolution-assisted copper chloride desorption

[0026] A copper composite electrode is used as the cathode, and a chlorine-producing anode is used as the anode.

[0027] A hydrogen evolution reaction occurs on the surface of the copper composite electrode. Through the diffusion and desorption of hydrogen bubbles, the cuprous chloride deposited on the surface is dispersed and released into the seawater.

[0028] A chlorine evolution reaction occurs on the surface of the chlorine-producing anode, generating active chlorine atoms that combine with seawater to form hypochlorite ions;

[0029] 3) Chlorine production by electrolysis

[0030] Using a chlorine-producing anode as the anode and a titanium cathode as the cathode;

[0031] A chlorine evolution reaction occurs on the surface of the chlorine-producing anode, generating active chlorine atoms that combine with seawater to form hypochlorite ions;

[0032] Oxygen absorption and hydrogen evolution reactions occur on the surface of the titanium cathode;

[0033] During normal operation, it cycles between working states 1) and 2). When the copper composite electrode is depleted, it switches to working state 3).

[0034] The specific process of the application method of the low-power electrolytic antifouling device for marine unmanned equipment involved in this invention includes the following steps:

[0035] First, determine the space required for fouling protection of the marine unmanned equipment and the maintenance and replacement cycle, calculate the size of the copper composite electrode, and adapt the external dimensions of the low-power electrolytic antifouling device for the marine unmanned equipment.

[0036] Then, one or more sets of low-power electrolytic antifouling devices for marine unmanned equipment are deployed in designated locations;

[0037] Finally, the individual low-power electrolytic antifouling device for marine unmanned equipment is directly connected to the power supply of the marine unmanned equipment, or multiple sets of low-power electrolytic antifouling devices for marine unmanned equipment are connected in parallel and then connected to the power supply of the marine unmanned equipment.

[0038] Compared with existing technologies, this invention uses copper ions generated by electrolysis as the main antifouling agent and chlorine produced by seawater electrolysis as an auxiliary antifouling agent. It uses intermittent electrolysis to generate copper ions and hypochlorite ions to control marine organisms. By matching electrode parameters, it effectively reduces the electrolysis current, extends the lifespan of the copper composite electrode, reduces electrolysis power consumption, and ensures a low-power and stable antifouling effect. Specifically, after the copper composite electrode is depleted, hypochlorite ions are generated by chlorine-producing anode electrolysis to continue antifouling. Its structure is simple and rationally designed, and it has the function of accelerating the release of electrolyzed copper products into the environment. It uses a wide-voltage range DC power supply for direct power supply, which is suitable for the power supply characteristics of unmanned equipment, further reducing energy loss during the energy conversion process. It is suitable for semi-open seawater spaces for marine unmanned equipment. Attached image description:

[0039] Figure 1 This is a schematic diagram of the main structure of the low-power electrolytic antifouling device for marine unmanned equipment involved in this invention.

[0040] Figure 2 This is a schematic diagram of the logic principle of the electrolysis control module involved in this invention.

[0041] Figure 3 This is a schematic diagram of the logic principle of the output port switching unit involved in this invention.

[0042] Figure 4 This is a schematic diagram showing the usage status of the low-power electrolytic antifouling device for marine unmanned equipment involved in this invention. Specific implementation methods:

[0043] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods.

[0044] Example 1:

[0045] The main structure of the low-power electrolytic antifouling device for marine unmanned equipment involved in this embodiment is as follows: Figure 1 As shown, it includes a copper composite electrode 1, a chlorine-producing anode 2, a titanium cathode 3, a fixed base 4, a sealed junction box 5, an electrolysis control module 6, and a watertight power connector 7. The chlorine-producing anode 2 is arranged around the copper composite electrode 1, and the titanium cathode 3 is arranged in the center of the chlorine-producing anode 2. The fixed base 4 is arranged at the bottom of the structure formed by the copper composite electrode 1, the chlorine-producing anode 2, and the titanium cathode 3, and the sealed junction box 5 is arranged at the top. The electrolysis control module 6 is arranged inside the sealed junction box 5, and the watertight power connector 7 is arranged at the top.

[0046] The electrolysis control module 5 involved in this embodiment is as follows: Figure 2As shown, it integrates a DC power conversion unit, an output port switching unit, and a measurement control unit. It also has one DC input port and three output ports (A, B, and C). The DC power conversion unit supplies power to both the output port switching unit and the measurement control unit. The measurement control unit transmits measurement control signals to the output port switching unit. Wherein:

[0047] The DC power conversion unit includes two isolated DC-DC conversion circuits, which can ensure the stable production of anti-fouling ions under the condition of minimum power consumption;

[0048] The output port switching unit includes several solid-state relays. Through combinations of switches, it switches between copper composite electrode 1 as the anode and titanium cathode 3 as the cathode (S3S2 closed).

[0049] The system operates in three main states: (S1S4 open) with copper composite electrode 1 as the cathode and chlorine anode 2 as the anode (S1S4 closed, S2S3 open); and (S3S4 closed, S1S2 open) with chlorine anode 2 as the anode and titanium cathode 3 as the cathode (S3S4 closed, S1S2 open). Figure 3 As shown;

[0050] The measurement and control unit includes a central processing unit, registers, and a current sensor, and controls the switching of operating states.

[0051] The low-power electrolytic antifouling device for marine unmanned equipment involved in this embodiment has the following three working states:

[0052] 1) Copper composite electrode 1 generates copper ions through electrolysis

[0053] Electrolysis control module 6 adjusts output port A to positive, output port B to negative, and output port C to disconnect from the power supply;

[0054] Electrolysis occurs in copper composite electrode 1, mainly generating cuprous ions. The cuprous ions combine with chloride ions in seawater to form cuprous chloride, which adheres to the surface of copper composite electrode 1.

[0055] Oxygen absorption and hydrogen evolution reactions occur on the surface of titanium cathode 3.

[0056] 2) Copper composite electrode 1 hydrogen evolution-assisted copper chloride desorption

[0057] Electrolysis control module 6 adjusts output port A to the negative terminal, output port B to be disconnected from the power supply, and output port C to the positive terminal;

[0058] A hydrogen evolution reaction occurs on the surface of the copper composite electrode 1. Through the diffusion and desorption of hydrogen bubbles, the cuprous chloride deposited on the surface is dispersed and released into the seawater.

[0059] A chlorine evolution reaction occurs on the surface of chlorine anode 2, producing active chlorine atoms, which combine with seawater to form hypochlorite ions;

[0060] In low-velocity seawater, copper ions have a poor desorption effect on the surface of copper electrodes and tend to form dense cuprous chloride that adheres to the electrode surface. When copper composite electrode 1 is used as the cathode, during chlorination, copper composite electrode 1 accelerates the desorption and release of copper ions through the hydrogen evolution reaction, which can effectively improve the early antifouling effect.

[0061] 3) Chlorine production by electrolysis

[0062] Electrolysis control module 6 adjusts output port C to the positive terminal and output port B to the negative terminal;

[0063] A chlorine evolution reaction occurs on the surface of chlorine anode 2, producing active chlorine atoms, which combine with seawater to form hypochlorite ions;

[0064] Oxygen absorption and hydrogen evolution reactions occur on the surface of titanium cathode 3.

[0065] During normal operation, it cycles between working states 1) and 2), and the pause time can be set according to the actual anti-fouling requirements.

[0066] When the copper composite electrode 1 is consumed, the output current measured under working state 1) remains 0. When switching to working state 3), only hypochlorous acid is used to inhibit marine biofouling.

[0067] The specific process of the application method of the low-power electrolytic antifouling device for marine unmanned equipment involved in this embodiment includes the following steps:

[0068] First, determine the space required for fouling protection and the maintenance and replacement cycle of the marine unmanned equipment in order to calculate the size of the copper composite electrode 1 and adapt it to the external dimensions of the low-power electrolytic antifouling device for the marine unmanned equipment.

[0069] Then, the low-power electrolytic antifouling device for marine unmanned equipment is placed in the upper part of the marine unmanned equipment as much as possible when it is working in the protected space. If the vertical posture of the marine unmanned equipment is constantly changing during operation, multiple sets of smaller-sized low-power electrolytic antifouling devices for marine unmanned equipment are matched to ensure the uniform distribution of antifouling agent.

[0070] Secondly, the low-power electrolytic antifouling device for marine unmanned equipment is connected to the power interface of the marine unmanned equipment via a cable and watertight power connector 7. The low-power electrolytic antifouling device can be directly connected to the power interface on the marine unmanned equipment, or it can be connected to a nearby low-power electrolytic antifouling device for marine unmanned equipment via an adapter cable and connector, forming a parallel connection where all devices are powered by the same power interface (provided the total required current does not exceed the cable's load limit). Figure 4 As shown;

[0071] Finally, by controlling the on / off power supply of the marine unmanned equipment's power interface, the system controls whether to activate the low-power electrolytic antifouling device of the marine unmanned equipment.

Claims

1. A hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer, characterized in that, The main structure includes a copper composite electrode and a chlorine-producing anode arranged around it, a titanium cathode arranged at the center of the chlorine-producing anode, and an electrolysis control module connected to the copper composite electrode, the chlorine-producing anode, and the titanium cathode.

2. The hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer according to claim 1, characterized in that, The electrolysis control module integrates a DC power conversion unit, an output port switching unit, and a measurement control unit, and has at least one DC input port and three output ports; wherein: The DC power conversion unit includes two isolated DC-DC conversion circuits, which convert the DC power supplied by the unmanned equipment, which has a voltage range of 5-100V, into two power supplies with a specified voltage. One supply is to the measurement and control unit, which uses a constant voltage output of 12V; the other supply is to the output port, which uses a voltage-limited and current-limited output mode. The maximum output voltage and maximum output current are determined according to the structural characteristics of the copper composite electrode. The output port switching unit includes several solid-state relays. By receiving control signals from the measurement and control unit, it connects the positive and negative terminals of the DC power conversion unit output current to two of the three ports respectively. Through the combination of switches, it switches the working state of the copper composite electrode, the chlorine anode, and the titanium cathode. The measurement and control unit includes a central processing unit, registers, and a current sensor. When powered on, the central processing unit executes the PLC program stored in the registers and sends action commands to the output port switching unit based on the program running time and the measured output current.

3. The hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer according to claim 1, characterized in that, The copper composite electrode is made of copper-based materials, including copper or copper ions as the main antifouling agent, which are released more rapidly in seawater through anodic polarization.

4. The chlorine-producing anode 2 according to claim 1 is made of a material comprising a titanium-based noble metal oxide anode, a platinum-titanium plate, and a platinum-niobium plate, which undergoes a chlorine evolution reaction through anodic polarization in seawater, and serves as an auxiliary anode during hydrogen evolution at the copper composite electrode.

5. The hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer according to claim 1, characterized in that, The titanium cathode is made of pure titanium metal and serves as an auxiliary cathode during anodic polarization of the copper composite electrode and the chlorine-producing anode.

6. A hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzers according to any one of claims 1-5, characterized in that, The bottom of the copper composite electrode, the chlorine anode, and the titanium cathode are mounted on a fixed base, and the top is connected to a sealed junction box. The electrolysis control module is located inside the sealed junction box, and the watertight power connector is located on the top of the sealed junction box.

7. The hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer according to claim 6, characterized in that, Both the mounting base and the sealed junction box are made of engineering plastics.

8. A hydrogen-autonomous separation electrolysis seawater chlorine production electrolytic cell according to any one of claims 1-5, characterized in that, It has the following 3 working states: 1) Copper ions are generated by electrolysis using copper composite electrodes. The copper composite electrode serves as the anode and undergoes electrolysis, primarily generating cuprous ions. These cuprous ions combine with chloride ions in seawater to form cuprous chloride, which adheres to the surface of the copper composite electrode. When a titanium cathode is used as a cathode, oxygen absorption and hydrogen evolution reactions occur on its surface. 2) Copper composite electrode hydrogen evolution-assisted copper chloride desorption The copper composite electrode serves as the cathode, where a hydrogen evolution reaction occurs on its surface. Through the diffusion and desorption of hydrogen bubbles, the cuprous chloride deposited on the surface is dispersed and released into the seawater. The chlorine-producing anode acts as the anode, and a chlorine evolution reaction occurs on its surface, producing active chlorine atoms that combine with seawater to form hypochlorite ions. 3) Chlorine production by electrolysis The chlorine-producing anode acts as the anode, and a chlorine evolution reaction occurs on its surface, producing active chlorine atoms that combine with seawater to form hypochlorite ions. When a titanium cathode is used as a cathode, oxygen absorption and hydrogen evolution reactions occur on its surface.

9. The hydrogen-autonomous separation and electrolysis of seawater to produce chlorine electrolyzer according to claim 8, characterized in that, The application method's process includes the following steps: First, determine the space required for fouling protection of the marine unmanned equipment and the maintenance and replacement cycle, calculate the size of the copper composite electrode, and adapt the external dimensions of the low-power electrolytic antifouling device for the marine unmanned equipment. Then, one or more sets of low-power electrolytic antifouling devices for marine unmanned equipment are deployed in designated locations; Finally, the individual low-power electrolytic antifouling device for marine unmanned equipment is directly connected to the power supply of the marine unmanned equipment, or multiple sets of low-power electrolytic antifouling devices for marine unmanned equipment are connected in parallel and then connected to the power supply of the marine unmanned equipment.

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