72 results about "Corrosion potential" patented technology

The invention provides a synchronous electrochemical test and hydrogen evolution test experimental device and method, and belongs to the field of metal corrosion research. The experimental device provided by the invention comprises a hydrogen evolution test module, an electrochemical test module and a control system module, and the control system module controls the hydrogen evolution test module and the electrochemical test module to work through circuit connection. By combining the hydrogen evolution test and the electrochemical test, the automatic accurate measurement of the hydrogen evolution amount in the metal corrosion process can be realized, the measurement of the corrosion rate, the corrosion potential and the charge transfer amount in the oxidation-reduction reaction can also be realized, and the problems of poor sustainability and low precision of the traditional hydrogen evolution test method are avoided; the hydrogen evolution test data and the electrochemical test data are automatically obtained while one-time sample preparation is realized.

The invention belongs to the technical field of surface engineering protective coatings, and discloses a nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, a magnetron sputtering technology is adopted, a CoCrFeMnNi target serves as a cathode target material, and a corrosion-resistant high-entropy alloy coating is obtained through deposition on the surface of a base body; and then, in a three-electrode system, the corrosion-resistant high-entropy alloy coating is placed in an electrolyte containing a nitrogen heterocyclic onium salt compound to be subjected to electro-deposition, and the nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating is prepared. The corrosion-resistant inorganic-organic hybrid coating prepared by the invention has excellent corrosion resistance, can keep high stability and durability in a complex corrosion environment, and has relatively high corrosion potential and relatively low corrosion current density. The coating can remarkably prolong the service life of a structural base material, is suitable for various harsh working conditions, and provides an efficient and reliable protection solution for industrial application.

The invention relates to the technical field of detection, in particular to a method for detecting inorganic phosphate ions. In the method, the concentration of the inorganic phosphate ions in the to-be-detected liquid is calculated according to the instantaneous corrosion potential of the iron electrode, the second-level response of inorganic phosphate ion detection can be realized, and the method has the characteristics of rapid detection and real-time online monitoring. According to the method, disordered spontaneous corrosion is not passively observed, but an ideal reaction interface is actively and periodically constructed, and an uncontrollable corrosion process is converted into a stable and reliable analysis signal.

The invention relates to a method for the radioactive decontamination of the internal face of the metal wall of an item of fluid-circulating equipment in a nuclear facility, the wall being made of a metal alloy and the internal face of this wall being covered with a surface layer of metal oxides, the method comprising at least one step a) of dissolving the surface layer of metal oxides, followed by a step b) of corroding the internal face of the wall, and being characterised in that: (1) steps a) and b) comprise circulating through the item of equipment a reducing aqueous solution at a temperature of at least 75°C; (2) step a) comprises, simultaneously with circulating the reducing aqueous solution through the item of equipment, biasing the wall to a potential lower than the corrosion potential of the metal alloy in contact with the reducing aqueous solution; and (3) the biasing of the wall is stopped at the end of step a). The invention is intended for use in the nuclear field, in particular for the decommissioning of items of metal equipment as conventional waste or for carrying out thorough decontamination of these items of equipment.

This invention discloses a numerical simulation method for the corrosion rate of high-strength steel under marine stress environments, belonging to the field of corrosion and protection technology. The method includes the following steps: establishing a geometric model for simulation and meshing the model; setting material properties, including corrosion kinetic parameters and basic mechanical property parameters; applying boundary conditions to the geometric model to simulate the actual stress state of the high-strength steel plate; formulating a kinetic expression formula for the electrochemical reaction to describe the electrochemical behavior during corrosion; and performing a corrosion kinetic-mechanical coupling analysis to calculate the distribution of corrosion current, corrosion potential, and local corrosion rate. This invention, by constructing a multiphysics model, can accurately extrapolate and predict the dynamic corrosion rate of high-strength steel under different stresses and environmental parameters. It provides crucial theoretical basis and data support for the design, life assessment, and maintenance decisions of marine engineering structures.

The application provides a kind of anticorrosion performance detection method and system for environmental protection screw, it is related to material corrosion performance test technical field, obtain first acoustic signal and second acoustic signal, in the case where second acoustic signal appears after detecting first acoustic signal, trigger passive film breakage event record once, and after the bare substrate at passive film breakage and corrosion medium reach self-corrosion potential stable state, the self-corrosion potential value between screw substrate and reference electrode is collected;When self-corrosion potential value compared with the reference potential value recorded before passive film breakage event occurs changes to negative direction step and the change amplitude crosses passive-activation transition characteristic potential zone, it is determined that the passive film of the environmental protection screw has been damaged and the anticorrosion performance is unqualified.The application can carry out acoustic and electrochemical multi-parameter fusion determination in environmental protection screw anticorrosion performance detection, to improve the identification accuracy of passive film breakage.

The invention relates to the technical field of water quality monitoring, and provides a domestic water full life cycle risk assessment method, which comprises the following steps: collecting water quality parameters at a plurality of monitoring nodes in real time, then carrying out Z-Score standardization and Min-Max normalization, and generating a normalized index vector set; performing weighted accumulation on the risk contribution function of the normalized values of all indexes in the normalized index vector set to obtain a health degree score; performing fusion corrosion potential scoring according to the total iron normalized value and the PH normalized value in the normalized index vector set, and performing biological membrane potential scoring according to the residual chlorine normalized value and the turbidity normalized value in the normalized index vector set to obtain a safety degree score; based on the normalized values of the total hardness, the turbidity, the chromaticity and the hydrogen sulfide, calculating a sensory irregularity mean value to obtain a comfort level score; and calculating a Pearson correlation coefficient matrix among the health degree score, the safety degree score and the comfort degree score according to the historical data window to generate a comprehensive risk score.

The application provides an integrated intelligent stripping system and control method for a heat sink assembly, which comprises a stripping detection unit, an intelligent control unit, a stripping execution unit and a recovery unit; the stripping detection unit collects distributed potential data and real-time thickness data on the surface of the heat sink assembly; the intelligent control unit generates a stripping process scheme for the heat sink assembly; whether an anti-corrosion linkage mechanism is triggered is determined according to the corrosion potential data and the coating thickness data; the stripping execution unit sprays stripping according to the differential stripping process scheme; and the recovery unit cyclically purifies and fractionally recovers metal ions from the stripping waste liquid. Through the linkage and differential process adaptation of multiple units, the application realizes the integrated cooperation of stripping detection, process execution and waste liquid recovery of the heat sink assembly, greatly improves the adaptability of the stripping process, the controllability of the stripping process and the environmental protection of resource utilization, and completes the integrated intelligent stripping of the heat sink assembly.

The invention discloses rare earth Er-doped CrMo steel and a thermodynamic-based preparation method thereof, and relates to the technical field of alloy materials. According to thermodynamic calculation of a phase diagram, the range of the adding amount of Er is obtained through phase change, the mechanical property of the iron-based alloy is improved by controlling the change of the Er element content and through the phase change, and refining of the structure and synergistic enhancement of the performance are achieved by adopting a non-consumable electric arc furnace for smelting and controlling the cooling rate and the annealing / tempering treatment process. And through molten steel purification and grain refinement of rare earth Er, an action mechanism of a dispersion phase is formed, and the tensile strength, microhardness and corrosion resistance of the material are remarkably improved. Experimental results show that when the Er content is 0.1%, the tensile strength of the alloy steel is improved by about 44.6%, the hardness is improved by about 10.7%, the corrosion potential is improved by 10%, the corrosion current density is reduced by 81.8%, and the performance is optimal. The method is simple, components are controllable, and the method is suitable for large-scale industrial preparation of the structural steel.

The invention relates to the technical field of metal structure corrosion resistance data processing, in particular to a simulation calculation evaluation method for corrosion resistance of a multi-welding-seam area, which comprises the following steps: establishing a three-dimensional finite element model according to welding seam geometry and material parameters of a base metal / heat affected zone / weld nugget area; directly importing the obtained continuous residual equivalent stress field into a three-dimensional finite element model in the form of an interpolation function or an external field, and constructing stress dependent electrochemical parameters in an electrode dynamic boundary condition; after parameter setting is completed, electrode surface corrosion potential distribution and local current density are solved; and evaluating the corrosion resistance of the welding seam area according to the current density distribution, the corrosion rate field and the time-varying corrosion depth data obtained by simulation. According to the scheme, the method can be used for judging the sensitive position of the multi-welding-seam area, the corrosion resistance of the multi-welding-seam area can be evaluated more systematically and visually, the possible corrosion sensitive position can be recognized in advance, and risks can be found more timely in engineering application.

A compressor includes at least one cell that includes an electrolyte membrane, an anode located on one main surface of the electrolyte membrane, and a cathode located on the other main surface of the electrolyte membrane; a metallic anode separator located on the anode; a cathode separator located on the cathode; and a voltage application unit for applying a voltage between the anode and the cathode, wherein the compressor causes, by using the voltage applier to apply a voltage, a proton extracted from an anode fluid supplied to the anode to move to the cathode and generates compressed hydrogen, and the compressor includes a controller for causing the voltage application unit to apply the voltage such that a voltage applied per unit cell is lower than a corrosion potential of the metallic anode separator.

The utility model relates to a monitoring device for a coastal reinforced concrete structure of a nuclear power plant. A monitoring mechanism which can be embedded into concrete and is used for collecting concrete performance parameters is arranged on the first side surface of the shell; wherein the concrete performance parameters comprise CL concentration, temperature, humidity, pH value, steel bar potential and corrosion potential; the shell comprises a cavity, and a sensing signal processing circuit electrically connected with the monitoring mechanism, a control circuit electrically connected with the sensing signal processing circuit, and a power supply and communication circuit electrically connected with the monitoring mechanism, the sensing signal processing circuit and the control circuit are arranged in the cavity; a through hole is formed in the second side face of the shell, and the power supply and communication circuit penetrates through the through hole to be electrically connected with a concrete monitoring system. According to the utility model, the concrete monitoring system can be helped to collect concrete performance parameters except corrosion potential, and the monitoring effect of the concrete monitoring system is improved.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a high-corrosion-resistance high-entropy alloy and a preparation method thereof. The chemical formula of the high-entropy alloy is AlFeNi, AlCrFeNi or Al0. 5CrFeNi, and the high-entropy alloy is prepared from the following nominal components in percentage by weight: 0 to 28.57 at% of Cr, 25 to 33.33 at% of Fe, 25 to 33.33 at% of Ni and 14.29 to 33.33 at% of Al. The high-entropy alloy disclosed by the invention has relatively low corrosion current density, relatively wide passivation area and relatively large corrosion potential, has very strong corrosion resistance and excellent stability in a seawater environment, and is of great significance in development and application of the high-entropy alloy in the ocean field.

The embodiment of the application discloses diamond-based composite wave-absorbing material; the method comprises the following steps: S1, the surface of nano-diamond particles is graphitized to obtain graphitized diamond composite particles; S2, the graphitized diamond composite particles are formed by molding to obtain a diamond-based composite wave-absorbing material blank; S3, the diamond-based composite wave-absorbing material blank is treated by high temperature and high pressure to obtain the diamond-based composite wave-absorbing material; the diamond-based composite wave-absorbing material has a minimum reflection loss value of -61.47 dB at 5.5 mm, the widest effective absorption bandwidth can reach 4.0 GHz at 2.7 mm, the Vickers hardness is between 40 and 60 GPa, the material is superhard, the normal temperature thermal conductivity is between 3.4 and 3.7 W / m*K, the initial oxidation temperature is between 1100 and 1250 DEG C, the corrosion current density is between 10 ‑6 ~10 ‑7 A / cm 2 , the self-corrosion potential is between -200 and 0 mV, the corrosion rate is between 0.001 and 0.005 mm / a, and the material is very corrosion resistant.

The application discloses a stainless steel weld corrosion life prediction method and system based on multi-parameter coupling, and the method comprises the following steps: collecting corrosion potential sequence, electrochemical impedance spectrum data and electrochemical noise data of a weld; extracting charge transfer resistance and double-layer capacitance from the impedance spectrum data, extracting noise resistance and localization factor from the noise data, extracting corrosion potential drift rate from the corrosion potential sequence, and combining into a multi-dimensional state observation vector; constructing a state space model describing the evolution of the corrosion state of the weld, using a nonlinear Wiener process to describe corrosion damage accumulation, and establishing a mapping relationship between the observation vector and the corrosion state variable; using a particle filtering algorithm to recursively update the posterior probability distribution of the corrosion state; extrapolating and predicting the time when the corrosion state reaches a preset failure threshold according to the posterior distribution, and obtaining a residual service life prediction value and a confidence interval. The multi-dimensional electrochemical parameters are fused, and the accurate prediction and uncertainty quantification of the weld corrosion life are realized.

The invention discloses a Z-type heteroconfiguration WO3-C3N4-CdS composite film for photoelectric cathode protection and a preparation method and application thereof, and belongs to the technical field of photoelectric cathode protection, and the preparation method comprises the following steps: cleaning conductive glass; growing a WO3 film on the conductive glass through a hydrothermal method; a WO3-C3N4 composite film is obtained on the surface of the WO3 film through a thermal polymerization method; and the WO3-C3N4-CdS composite film is obtained through growth by a pulling and dipping method. The Z-type heterojunction WO3-C3N4-CdS is constructed by increasing the photoanode conductivity and the contact area through the C3N4 layer, the problem that in the prior art, a type II heterojunction is difficult to protect carbon steel with low self-corrosion potential is solved, the coupling potential of the prepared composite thin film and CS generates cathodic polarization during illumination, and the self-corrosion resistance of the composite thin film is improved. And sufficient protection is provided for metal, so that the metal shows long-acting and stable photoelectrochemical cathode protection performance in a seawater environment.

This invention discloses a magnetically conductive plate assembly, a sound-generating device, and an electronic device, relating to the field of acoustic technology. The magnetically conductive plate assembly includes a body and a plating layer disposed on the surface of the body. The plating layer is primarily a polycrystalline material composed of Ni and Co elements. The polycrystalline material has at least one of a face-centered cubic structure and a close-packed hexagonal crystal structure. The average grain size of the plating layer is 0.01~15 μm, and the self-corrosion potential of the plating layer in a 3.5 wt.% NaCl solution is -0.7~-0.1 V. The magnetically conductive plate assembly of this invention aims to solve the technical problem of improving the magnetic permeability of the magnetically conductive plate assembly while ensuring its corrosion resistance.

The embodiment of the invention provides a cathode protection state testing method and device, equipment and a medium. The method comprises the following steps: receiving first input of a user; the first input is used for triggering a preset electrical parameter acquisition process; in response to the first input, executing a preset electrical parameter acquisition process to obtain electrical parameters related to the cathode protection state; wherein the electrical parameters at least comprise a power-on potential, a power-off potential, a self-corrosion potential, a direct-current electric signal and an alternating-current electric signal; and displaying the electrical parameters, and sending the electrical parameters to a server, so that the server calculates the alternating current density according to the electrical parameters, thereby obtaining the test result of the cathode protection state according to the corresponding relationship between the alternating current density and the corrosion risk. According to the embodiment of the invention, the testing efficiency and accuracy of the cathode protection state can be improved.

The present application provides an electronic device, comprising a first structural member and a second structural member. The first structural member comprises a first metal substrate; the second structural member comprises a second metal substrate and a decorative layer arranged on one side of the second metal substrate; the first metal substrate is electrically connected to the second metal substrate, and the corrosion potential of the first metal substrate is lower than that of the second metal substrate; and the side of the decorative layer facing away from the second metal substrate is further provided with an insulating layer, the insulating layer is a transparent or translucent layer, and the impedance of the insulating layer is greater than or equal to 2000 Ω. The insulating layer is arranged on the decorative layer on the second metal substrate having a high corrosion potential, so as to prevent the formation of a closed circuit between metal substrates having different chemical activities in a sweat environment or a salt spray environment and the generation of a potential difference, thereby reducing the probability of electrical corrosion in the first metal substrate having a low corrosion potential, and better meeting the long-term use requirements of the electronic device.

The invention discloses a preparation method of a porous nanorod zinc oxide doped methyl methacrylate polymer film, which comprises the following steps: firstly preparing a porous nanorod zinc oxide material, and then taking the prepared porous nanorod zinc oxide material as a dopant of the methyl methacrylate polymer film to prepare the porous nanorod zinc oxide doped methyl methacrylate polymer film. And thermally polymerizing a layer of polymer film on the metal substrate. The film layer prepared by the method has high corrosion potential, low corrosion current and large impedance, which indicates that the film layer has good corrosion resistance. The coating can be applied to anticorrosion engineering of surfaces of electrical equipment such as air conditioners, electric water heaters, air conditioners and refrigerators and metal parts of mechanical equipment such as tractors and cranes.

The invention relates to the technical field of physical and chemical detection of metal materials, in particular to an intelligent microscopic structure recognition and quantitative evaluation method fusing a physical mechanism, which comprises the following steps of: performing adaptive contrast enhancement on a metallographic image by using a grain boundary corrosion potential difference, and constructing a high signal-to-noise ratio physical characteristic field; a topology reconstruction model fusing a martensite phase transformation mechanism, flow field dynamics simulation and thermodynamic equilibrium repair is constructed, and a closed grain network conforming to physical authenticity is reduced; based on the reconstructed crystal grain topology network, realizing multidimensional quantitative characterization and anti-noise rating of the effective size, shape anisotropy and texture orientation of the crystal grains through an equivalent ellipse fitting and area weighting algorithm; a local variable coefficient thermodynamic diagram is generated through sliding window scanning, and quantitative evaluation is carried out on the tissue heterogeneity. According to the method, the problems of incomplete grain boundary identification, statistical rating distortion and local defect missing detection in the prior art are effectively solved, and automatic early warning of local coarse grain and mixed crystal risks of the high-performance metal material is realized.

The utility model provides a floating type offshore wind power foundation corrosion potential monitoring device, which belongs to the technical field of offshore wind power, and comprises a buoy, a floating frame fixed at the top end of the buoy, a lifting structure fixed at the top end of one side of the floating frame, and a potential measuring instrument arranged in a waterproof protective shell, one side of the waterproof protection shell is rotationally connected with a sealing door, and the protection structure comprises a rotating seat rotationally connected to the bottom end of the mounting plate, a rotating ring fixed to the outer side of the rotating seat and isolation assemblies arranged at the two ends of the rotating ring. According to the utility model, foreign matters are not easy to contact with the measuring electrode through the steel wire mesh, and seawater is prevented from directly impacting the measuring electrode, so that the isolation protection function of the device is realized, the impact of water flow on the measuring electrode is reduced, the potential measurement is more accurate, and various objects are prevented from being attached to the surface of the measuring electrode; the service life of the measuring electrode is prolonged while the measuring accuracy of the measuring electrode is guaranteed.

The application discloses a preparation method of high-strength corrosion-resistant copper alloy wire, which comprises the following steps: (1) preparing a composite powder; (2) preparing a pretreated powder; (3) sensitizing treatment, activation, and surface chemical copper plating of the activated powder to obtain a copper-plated powder; (4) weighing copper powder, nickel powder, silicon powder and the copper-plated powder, heating and melting, adding the copper-plated powder into the melt, casting and forming, heating and stress elimination, cooling, and drawing into copper alloy wire by using a wire drawing machine; the copper alloy wire is kept at 220 DEG C for 30 min, then heated to 300 DEG C and kept for aging for 3 h, after the keeping, the copper alloy wire is cooled to below 200 DEG C in the furnace, then taken out and cooled to room temperature, and the high-strength corrosion-resistant copper alloy wire is obtained. The copper alloy casting prepared by using the method has high tensile strength, the copper alloy wire has high self-corrosion potential, and good strength and corrosion resistance are exhibited.

The application discloses a kind of marine underwater corrosion potential measuring devices, by being packaged in pressure-resistant shell inside main control module, real-time clock module and measurement module and other functional modules, obtain a compact structure with strong pressure resistance, small size, can be put into each underwater depth of marine environment by marine underwater corrosion potential measuring device, in-situ test of material corrosion is carried out;By setting measurement module, the corrosion potential data of high precision of corrosion test sample at each depth under water can be detected, and data support can be provided for studying the corrosion mechanism of different materials under deep-sea conditions;By setting real-time clock module, the corrosion potential data can be obtained by triggering main control module to call measurement module at a specific time point, so that the detected corrosion potential data can be aligned with other equipment measurement data, and the main control module can execute multiple different measurement modes, improve the flexibility of measurement.The application is widely used in the field of corrosion potential measurement technology.

The application discloses a production method of a micro-channel aluminum flat tube with a layer distribution of corrosion potential gradient, and steps are as follows: (1) a micro-channel aluminum flat tube is made of a deformed aluminum alloy round ingot, the deformed aluminum alloy round ingot comprises 1.0-1.5 wt% of Mn and 0.1-0.15 wt% of Ti; (2) a zinc layer is sprayed on the surface of the micro-channel aluminum flat tube by a zinc spraying system under the condition that the temperature is greater than or equal to 500 DEG C, and a zinc-sprayed aluminum flat tube is formed; (3) the zinc-sprayed aluminum flat tube is subjected to heat treatment, the zinc layer on the surface of the zinc-sprayed aluminum flat tube diffuses to the inside, and a layer gradient diffusion layer is spontaneously formed. According to the application, the layer gradient distribution of gradually increasing corrosion potential from the surface of the micro-channel aluminum flat tube to the inside is achieved, and the corrosion potential of different regions of the surface of the micro-channel aluminum flat tube is close to consistent when extending to the inside by the same distance, so that the corrosion of the micro-channel aluminum flat tube is converted from point corrosion to layer corrosion in the use process, the corrosion resistance is doubled, and the leakage time of SWAAT salt spray test is increased from 2000 hours to 5000 hours.

This invention relates to the field of battery technology and proposes a battery comprising a first casing, the first casing including: a first metal component; and a second metal component disposed within the first metal component, such that the first metal component forms the outer surface of the first casing, and the second metal component forms the inner surface of the first casing. The materials of the first metal component and the second metal component are different. The corrosion potential of the second metal component is higher than that of the first metal component, and the corrosion potential of the second metal component is higher than that of the negative electrode of the battery. This prevents electrochemical corrosion of the second metal component, thereby improving the service life of the first casing and ensuring its safety performance, thus improving the safe operation of the battery.

The invention discloses an aluminum alloy containing rare earth, a preparation method of the aluminum alloy and heating and ventilation equipment. The rare earth-containing aluminum alloy comprises the following components in percentage by mass: 0.05%-0.30% of Fe, 0.05%-0.25% of Si, 0.80%-1.6% of Mn, 0.05%-0.45% of Cu, 0.01%-0.15% of Ti, 0.10%-0.20% of Zr, 0.05%-0.30% of rare earth and the balance of Al and impurity elements, wherein the sum of the mass percentages of the impurity elements is less than or equal to 0.20%. Elements of the aluminum alloy are optimized and selected to achieve uniform distribution of intermetallic compounds of the aluminum alloy, so that the corrosion potential of an aluminum matrix is improved, the corrosion potential of harmful intermetallic compounds is reduced, the corrosion potential difference between the aluminum alloy matrix and the intermetallic compounds is reduced, and the corrosion resistance is improved; after the aluminum alloy containing the rare earth is exposed for 12 days under a cyclic acidic seawater test (SWAAT) of the ASTM G85 standard, the corrosion depth can reach 150 microns and below.

The application discloses a kind of based on galvanic critical dimension of multi-metal system galvanic effect evaluation method and device, and it is related to electrochemical corrosion evaluation technical field.Multi-metal system galvanic effect evaluation method includes steps: obtaining the polarization curve and self-corrosion potential of each metal in multi-metal system, determine galvanic anode and galvanic cathode on each lap surface;Calculate the galvanic critical dimension of any two groups of metals in multi-metal system;Compare the size of actual interface distance and combined critical distance, determine the galvanic corrosion form of multi-metal system;If the galvanic of two lap surfaces has no mutual influence, then carry out independent galvanic analysis, if the galvanic of two lap surfaces exists potential competition, then carry out coupling analysis to the galvanic of two lap surfaces.The application fully considers the complex potential coupling, interface interference and mutual influence effect between multi-metals, and improves the accuracy, applicability and scientificity of multi-metal lap joint structure galvanic corrosion evaluation.

To stably maintain a fitting state of an electric wire physical quantity measurement device to an electric wire.SOLUTION: An electric wire physical quantity measurement device comprises: a sensor which is fitted to an electric wire containing first metal to measure a physical quantity of the electric wire; a body part which acquires data of the physical quantity measured by the sensor; a housing part which houses at least a part of the body part; and a clamp which contains second metal different from the first metal to hold the electric wire and to fix the housing part to the electric wire, wherein the clamp comprises: a clamp body part which contains the second metal and is tightened in a state of holding the electric wire; and a collar which is constituted as a cylindrical member and is arranged between the electric wire and the clamp body part, and the collar comprises: a first metal layer which contains the first metal and is arranged to cover an outer periphery of the electric wire; and a resin layer which contains a resin and a plurality of pieces of intermediate metal powder containing intermediate metal having corrosion potential between corrosion potential of the first metal and corrosion potential of the second metal and dispersed in the resin, and is provided to cover an outer periphery of the first metal layer.SELECTED DRAWING: Figure 4

The invention discloses a micro electrical stimulation nerve conduit and a preparation method thereof. The nerve conduit prepared by the invention has good medical value on nerve injury repair and nerve transplantation function repair through various ways of establishing a mechanical space, supplementing nerve growth factors, performing electrical stimulation on nerve development and the like. The whole nerve conduit is made of a degradable material and is degraded in vivo after the effect is achieved, and a secondary mechanical taking operation is avoided. Metal is embedded in the two ends of the catheter, micro-current stimulation is generated in a self-source mode by utilizing the corrosion potential difference of different metals and taking body fluid as electrolyte, nerve development is promoted, and the safety and miniaturization of the catheter with the same effect are improved. The fiber membrane is arranged on the inner-layer tube body, so that the carried nerve growth factors can be slowly released, and nutrients required by nerve growth can be provided; the fiber membrane is rolled to be cylindrical, so that the nerve can grow along the catheter in an adhesion manner, and the regeneration efficiency of nervous tissues is improved.