120 results about "Corrosion potential" patented technology

The invention belongs to the technical field of corrosion and protection simulation analysis, and particularly relates to a multi-physics coupling corrosion simulation method for a metal material in a seawater environment, which comprises the following steps: firstly, carrying out stress and deformation calculation on a structure, and then, carrying out analysis fitting on a polarization test result of the material according to the electrochemical corrosion condition of the structure in seawater, so as to obtain a simulation result; and finally, according to the mutual influence effect between stress and electrochemistry, establishing a coupling path, realizing multi-physics coupling simulation, and quickly calculating to obtain the corrosion potential and the corrosion current density on the surface of the structure and the corrosion rates at different positions, thereby determining the most sensitive position of corrosion. By establishing an independent simulation boundary module database, rapid calling and reading of simulation boundary parameters are achieved, rapid iterative calculation of long-period corrosion evolution is achieved, corrosion evaluation efficiency is greatly improved, and the problems that in the equipment service process, seawater corrosion prediction precision is low, and the test period is long are effectively solved.

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 present invention relates to the technical field of electric power safety protection, and particularly relates to a method for monitoring and evaluating the corrosion state of a grounding grid. The method comprises the steps of: acquiring a soil environment pH value of a grounding grid region; acquiring a soil Cl ion concentration of the grounding grid region; acquiring a corrosion potential of the grounding grid region; acquiring a corrosion rate of the grounding grid region; and on the basis of a soil resistivity, the soil environment pH value, the soil Cl ion concentration, the corrosion potential and the corrosion rate, determining the corrosion state of a grounding grid. Thus, by means of introducing determination parameters of a soil resistivity, a soil environment pH value and a soil Cl ion concentration, the corrosion state of a grounding grid can be more accurately determined and evaluated, such that the operational safety and service life of a substation grounding grid are more effectively evaluated, thereby providing technical support for electric power operation and maintenance personnel to take more scientific and rational maintenance measures.

The invention provides an anodic oxidation passivation method of a neodymium-iron-boron permanent magnet zinc coating, which comprises the following steps of: performing electrochemical anodic oxidation by taking a neodymium-iron-boron permanent magnet with a zinc coating on the surface as an anode, a Pt sheet as a cathode and a passivation solution as an electrolyte, forming a passivation layer on the surface of the neodymium-iron-boron permanent magnet with the zinc coating on the surface, and cleaning and drying to obtain the neodymium-iron-boron permanent magnet with the zinc coating on the surface. A chromium-free passivation film is formed on the neodymium-iron-boron permanent magnet zinc coating, and passivation of the neodymium-iron-boron permanent magnet zinc coating is completed; the passivation solution is prepared from 10 g / L to 20 g / L of molybdate, 10 g / L to 15 g / L of ammonium fluozirconate, 1 g / L to 10 g / L of etidronic acid, 1 g / L to 10 g / L of sodium dihydrogen phosphate, 1 g / L to 10 g / L of nitric acid, 1 g / L to 10 g / L of phosphoric acid and the balance distilled water. According to the method disclosed by the invention, a complete, uniform and compact passivation film is formed on the surface of the zinc coating after passivation, the corrosion potential is improved while the corrosion current is effectively reduced, and the time for generating a rust spot in a salt spray test exceeds 72 hours.

The utility model provides an electronic device which comprises a first structural member and a second structural member, the first structural member comprises a first metal matrix, the second structural member comprises a second metal matrix and a decoration layer arranged on one side of the second metal matrix, and the first metal matrix is electrically connected with the second metal matrix. The corrosion potential of the first metal matrix is lower than that of the second metal matrix; an insulating layer is further arranged on the side, away from the second metal base body, of the decorative layer, the insulating layer is a transparent or semitransparent layer, and the impedance of the insulating layer is larger than or equal to 2000 ohms. The insulating layer is arranged on the decorative layer on the second metal matrix with high corrosion potential, so that a potential difference caused by a closed loop formed between the metal matrixes with different chemical activities can be prevented in a sweat environment or a salt mist environment, and the probability of electrocorrosion of the first metal matrix with low corrosion potential is further reduced; and the long-term use requirement of the electronic equipment is well met.

The invention relates to the technical field of material testing, and discloses a material stress and micro-electrochemical in-situ corrosion potential testing device and a material stress and micro-electrochemical in-situ corrosion potential testing method. The invention provides an experimental device capable of simulating different stresses and actual test conditions and accurately evaluating the micro-area stress corrosion behavior of a material, and the stress corrosion and micro-area corrosion potential change rules of the material under different stress and electrochemical coupling effects are visually measured in situ. And a technical support is provided for revealing a stress corrosion mechanism in a metal material service environment. Meanwhile, different sample test requirements of a plurality of material product production lines are considered, high-accuracy and high-flexibility adjustment of multiple test conditions is realized, and by planning a scientific and reasonable sample test distribution strategy, the test frequency requirement of parallel task test of the multiple material product production lines and the test device switching target are met, and the test efficiency is improved. The efficiency and operation reliability of the test system are improved.

The invention relates to an L450 grade pipeline steel hot-rolled plate coil for ground gathering and transportation and a production method thereof. The chemical composition of the steel is C: 0.061%-0.070%, Si: 0.15%-0.25%, Mn: 0.39%-0.48%, P≤0.012%, S: 0.0028%-0.003%, Als: 0.030%-0.045%, Nb: 0.032%-0.038%, Ti: 0.020%-0.023%, Cu: 0.34%-0.42%, Cr: 0.32%-0.39%, N≤0.004%, and the remainder is iron and impurities. The yield strength of the hot-rolled coil product is 465-478 MPa, the tensile strength is 572-588 MPa, the elongation after fracture is ≥36.5%; the Charpy impact energy Akv at -40°C is ≥308 J; the corrosion rate is 0.0234-0.0270 mm / a, the corrosion potential is ≥-0.452 V, and the corrosion current density is ≤1.06×10 ‑5 A.cm ‑2 .

The invention discloses a preparation method of a high-strength corrosion-resistant copper alloy wire. The preparation method comprises the following steps: (1) preparing composite powder; (2) preparing pretreatment powder; (3) sensitization treatment and activation are carried out, surface chemical copper plating is carried out on the activated powder, and copper plating powder is obtained; (4) weighing copper powder, nickel powder, silicon powder and copper-plated powder, heating and melting, adding the copper-plated powder into the melt, casting and molding, heating to eliminate stress, cooling, and drawing into a copper alloy wire by using a wire drawing machine; and the copper alloy wire is subjected to heat preservation for 30 min at the temperature of 220 DEG C, then the temperature is increased to 300 DEG C, heat preservation aging is conducted for 3 h, furnace cooling is conducted to 200 DEG C or below after heat preservation is completed, then the copper alloy wire is taken out and subjected to air cooling to the normal temperature, and the high-strength corrosion-resistant copper alloy wire is obtained. The copper alloy casting prepared through the method has high tensile strength, and the prepared copper alloy wire is high in self-corrosion potential and shows good strength and corrosion resistance.

The invention provides an electrochemical selective extraction process and device, and relates to the technical field of material extraction in the nuclear fuel circulation process, and the electrochemical selective extraction process comprises the following steps: respectively carrying out corrosion potential tests on an uncontaminated stainless steel sample and a stainless steel sample contaminated with nuclide; obtaining the corrosion potential a of the uncontaminated sample relative to the cathode and the corrosion potential b of the contaminated nuclide sample relative to the cathode; putting a to-be-treated metal workpiece of which the surface is adhered with a pollutant material into an anode basket of an electrochemical extraction device, and connecting the anode basket to an anode of a direct-current power supply or a potentiostat; mixing nitric acid, sodium nitrate, a corrosion inhibitor and a slow release agent to prepare an electrolyte; a cathode basket of the extraction device is connected with a negative electrode of a direct-current power supply or a potentiostat, an anode basket is nested in the cathode basket, and the anode basket and the cathode basket are jointly immersed in electrolyte for extraction. According to the method, pollutants adhering to the irregular metal surface are effectively removed and recycled, the extraction rate of contaminated metal nuclides reaches 99% or above, and the introduction amount of matrix elements is lower than 3500 ppm / g matrix.

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.

According to the wrapper roller service life prediction method based on the single-factor test, the data set and the initial feature pool are constructed by using the existing single-factor measurement data and the wrapper roller service life; a prediction model is constructed by independently measuring single measurement values such as coating thickness, hardness, porosity, bonding strength, friction coefficient, abrasion loss, corrosion potential, current density, elastic modulus, yield strength, tensile strength and heat conductivity; in the model, obtaining an optimal feature subset to evaluate the performance of the optimal feature subset in the aspect of deriving complexity performance, and further constructing a nonlinear expression among the service life of the wrapper roller, the coating thickness, the hardness, the porosity, the bonding strength, the friction coefficient, the abrasion loss, the corrosion potential, the current density, the elastic modulus, the yield strength, the tensile strength, the heat conductivity and the like; therefore, the service life of the wrapper roller is predicted; the method can quickly predict the service life of the wrapper roller, and can effectively save the experiment cost.

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 present invention discloses a method for achieving corrosion resistance treatment on the surface of titanium alloy by means of laminated ironing and electrodeposition. First, the surface of the titanium alloy substrate is subjected to laminated ironing to form a nanocrystalline transition layer on the surface, increasing the dislocation density and introducing appropriate internal stress, effectively enhancing the surface residual stress of the titanium alloy. Then, the surface is polished at low frequency to obtain a reasonable surface roughness and improve the electrochemistry deposition reaction activity. Then, electrochemical deposition surface treatment is carried out. Sodium sulfate, methanol and titanium dioxide nanoparticles are added to the electrochemistry deposition solution to improve the deposition efficiency of the electrochemistry coating. The method of the present invention improves the corrosion resistance of the titanium alloy. The electrochemical impedance is increased by two orders of magnitude, the corrosion potential is shifted positively, the corrosion current density is reduced by two orders of magnitude, and the integrity of the electrodeposition coating is improved, reducing the coating defects.

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.

Disclosed herein are recovery-friendly aluminum alloys, methods of making and processing such alloys, and products made from such alloys. More particularly, a recycle-friendly aluminum alloy is disclosed that exhibits good thermal conductivity and corrosion potential characteristics despite being produced from less primary aluminum. The aluminum alloy may be used as a fin blank in industrial applications, including heat exchangers.

The invention belongs to the field of materials, and particularly relates to a corrosion-resistant rare earth magnesium-based composite material and a preparation method and application thereof. The preparation raw materials of the rare earth magnesium-based composite material comprise a magnesium base material and reinforced particles, the reinforced particles comprise titanium particles and aluminum coating layers coating the surfaces of the titanium particles, and the mass ratio of the aluminum coating layers to the titanium particles is (5-10): 100; the magnesium base material is an Mg-RE-Zn series alloy; the RE is selected from at least one of Gd and Y; in the magnesium base material, the mass percent of Gd is less than or equal to 11%, and / or the mass percent of Y is less than or equal to 6%. The rare earth magnesium-based composite material disclosed by the invention has corrosion potential and corrosion current which are close to those of a magnesium base material, so that the rare earth magnesium-based composite material can be used in a humid or corrosive environment, has better electric corrosion resistance and has better mechanical properties at room temperature and high temperature.

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 utility model discloses a corrosion monitoring system for a grounding grid of an electric power system, which comprises a front-end grounding grid corrosion detection unit and a rear-end data comparison test unit, and the front-end grounding grid corrosion detection unit further comprises a three-electrode state sensor, an excitation module, a detector, a data acquisition module and a microprocessor, the rear-end data comparison test unit further comprises an upper computer and a cloud platform, the soil corrosion rate is obtained through data comparison of electrochemical reaction and polarization potential generated by the monitoring electrode and natural corrosion potential of the reference electrode, the microprocessor transmits the soil corrosion rate to the upper computer, and the cloud platform transmits the soil corrosion rate to the upper computer. The upper computer transmits the soil corrosion rate to the cloud platform through the wireless network, so that remote monitoring is realized, the tedious process that only small-scale monitoring can be carried out and monitoring data needs to be transmitted to a monitoring center through a special network in the prior art is broken, limitation of off-line operation is avoided, and large-area and large-scale monitoring of the corrosion condition of the grounding grid is realized.

The present invention discloses a four-layer aluminum alloy plate with a layered distribution of corrosion potential gradient, comprising a first skin layer, an intermediate layer, a core layer, and a second skin layer stacked in sequence, wherein the first skin layer and the second skin layer are 4-series aluminum alloys; the alloy composition of the intermediate layer comprises the following components by weight: Si: 0.5-1, Fe: 0.2-0.5, Cu: 0.05-0.1, Mn: 1.2-2, Zn: 2-3, Ti: ≤0.5, with the balance being aluminum; the alloy composition of the core layer comprises the following components by weight: Si: 0.5-1, Fe: 0.2-0.5, Cu: 0.2-0.5, Mn: 0.2-1, Mg: 0.1-0.3, Zn: ≤0.05, Ti: ≤0.5, with the balance being aluminum. The present invention also discloses a preparation method thereof, comprising stacking alloy blocks, followed by hot rolling, intermediate annealing, cold rolling, and final annealing, and discloses its application in vacuum brazing at 580-620°C. The four-layer aluminum alloy plate of the present invention improves mechanical properties while taking into account corrosion resistance.

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 present invention relates to an HB450 grade wear-resistant and corrosion-resistant steel plate and a production method thereof. The chemical composition of the steel plate is as follows by weight: C: 0.20% to 0.23%, Si: 0.2% to 0.4%, Mn: 0.2% to 0.4%, Nb: 0.10% to 0.20%, Cr: 3.10% to 3.30%, Al: 0.31% to 0.4%, Ni: 1.0% to 1.5%, 1.4%≤Al+Ni≤1.8%, and the balance is Fe and unavoidable impurities; impurity elements in the steel are controlled as follows: P≤0.012%, S≤0.00 2%, [N]≤0.0040%, [H]≤0.00015%, [O]≤0.0010%, and retained austenite content of 5% to 8%; the present invention utilizes Nb to precipitate high-hardness particles to enhance the wear resistance of the steel plate, and utilizes Cr to increase the natural corrosion potential of the steel plate, thereby inhibiting corrosion by fluids such as seawater; adopts smelting, refining, slab continuous casting, heating and slow cooling, slab heating, controlled rolling, steel plate slow cooling, and tempering heat treatment processes to produce a wear-resistant and corrosion-resistant steel plate with a Brinell hardness of 450HB, which has wear resistance and corrosion resistance that is more than 1.2 times that of ordinary low-alloy wear-resistant steel plates with the same hardness.

The present invention provides a device and method for measuring corrosion potential in a tidal range zone. The device includes a data collector and a test tube. A first float, an electromagnet, a first limiting rod, a second limiting rod, and a reference electrode are provided in the test tube. A first through-slot and a second through-slot are symmetrically provided on the wall of the test tube. Multiple baffles are distributed in the first through-slot and the second through-slot. One end of the first float is connected to the electromagnet and the other end is connected to the reference electrode. One end of the first limiting rod is a first connecting end and the other end is a first free end. The first connecting end is rotatably connected to the left end of the electromagnet. One end of the second limiting rod is a second connecting end and the other end is a second free end. The second connecting end is rotatably connected to the right end of the electromagnet. When the electromagnet is energized, the first free end and the second free end are magnetically attracted to the left and right ends of the electromagnet, respectively. When the electromagnet is de-energized, the first free end extends into the first through-slot and is blocked by the baffle, while the second free end extends into the second through-slot and is blocked by the baffle. The present invention utilizes the coordinated action of a first float, an electromagnet, a first limiting rod, a second limiting rod, and a baffle to adjust the height of the reference electrode. The reference electrode stops moving when it reaches the test position, triggering a connection between the reference electrode and the test position to form a conductive circuit, enabling automatic monitoring of the corrosion potential at different heights of the sample being tested in the tidal range. By controlling the on and off states of the electromagnet, automatic potential measurement at different heights is achieved in a smart way, tailored to the ebb and flow of the seawater.

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.