278 results about "Electrode potential" patented technology

The invention relates to the technical field of integrated circuit manufacturing, in particular to a precise electroplating control system and method for an electroplated layer of a double-layer circuit board, and the method comprises the steps: building a multi-physical field coupling simulation model, and simulating the internal current density and ion concentration distribution of a via hole; constructing a mapping relation between the current density and the side wall electroplating thickness based on a simulation result, and predicting the electroplating thickness; through thickness prediction feedback, a time sequence adjustable pulse current control strategy is designed, the pulse amplitude, the duty ratio and the on-off period are dynamically adjusted, and current distribution optimization is guided; the state of the electroplating process is sensed in combination with real-time monitoring and analysis of multi-source parameters of electrode potential, conductivity and fluid velocity; and based on the prediction model and the real-time parameters, adjusting the pulse waveform and the time sequence through closed-loop compensation. According to the method, the uniformity and controllability of the thickness of the electroplated layer on the side wall of the via hole can be remarkably improved.

The invention provides an electrochemical active oxygen supply device for a washing machine and a preparation method. The device comprises a shell, a single closed reaction chamber is formed in the shell, a bifunctional anode electrode and a bifunctional cathode electrode are integrated in the reaction chamber, and a compact and uniform reaction area is formed between the anode electrode and the cathode electrode. When water flows through the reaction area, hydrogen peroxide (H2O2) and / or hydroxyl radicals (OH) are / is electrochemically generated on the surface in situ by accurately adjusting the electrode potential of the difunctional anode, so that instant generation and instant utilization of active oxygen are realized. The active oxygen directly enters a washing system of the washing machine along with water flow, bacteria, viruses and fungi can be efficiently inactivated under the normal-temperature or low-temperature washing condition without additionally adding chemical disinfectants, organic stains and peculiar smell molecules are synchronously degraded, and green, efficient and intelligent healthy washing is achieved.

The invention provides a lithium iron phosphate battery fast charging strategy optimization method and system based on reinforcement learning, and belongs to the technical field of battery management. Three-factor characteristics and capacity attenuation characteristics are extracted, gating fusion characteristics are generated in combination with potential sensitive characteristics, and a potential boundary constraint activation function is designed to calculate a cathode potential estimation value, so that an estimation range of the aged battery is automatically tightened; meanwhile, negative electrode potential characteristics are extracted through a negative electrode potential estimation sequence, and aging state characteristics are generated in combination with the capacity fading rate; under a reinforcement learning framework, taking aging state characteristics as condition input of a strategy network, designing a comprehensive reward function including a charging efficiency reward function and a lithium precipitation risk penalty function, and realizing multi-objective optimization; and the finally generated charging current curve can be dynamically adjusted according to the actual aging state of the battery and the real-time charging parameters, so that the charging speed of the new battery is prevented from being limited, and the lithium precipitation risk of the aged battery is effectively prevented.

The invention belongs to the technical field of battery preparation, and particularly relates to a secondary battery and electric equipment. The secondary battery comprises a negative pole piece, wherein the negative pole piece comprises a negative current collector and a negative active material layer arranged on at least one surface of the negative current collector; the negative active material layer comprises a main body region and a thinned region arranged at the edge of the main body region, and the thickness of the thinned region is smaller than that of the main body region; the negative pole piece further comprises an ionic conductive composite material, the ionic conductive composite material makes contact with the thinned area, and the ionic conductive composite material comprises ionic liquid and at least one of a conductive polymer and a sodium ion manganese-based layered oxide. According to the invention, the ionic conductive composite material is added into the negative electrode plate and is in contact with the thinned region, so that the effect of protecting the electrode plate is achieved, the sodium ion conductivity and capacity of the thinned region can be improved, polarization and negative electrode side potential drop in the circulation process can be slowed down, sodium precipitation and side reaction are inhibited, the loss of active sodium is reduced, and the service life of the battery is prolonged.

The invention discloses a PH electrode intelligent calibration method and system based on a self-adaptive calibration algorithm, and relates to the technical field of intelligent calibration control, and the method comprises the steps: carrying out the preprocessing of an original potential signal of an electrode, and obtaining a standardized potential; constructing a two-channel Gaussian process model, and outputting a calibrated pH value and uncertainty in real time; inputting a reinforcement learning decision network, automatically selecting an execution action according to a comprehensive reward function of a prediction error and resource consumption, and obtaining a new sample increment; and the new sample increment is updated to the Gaussian process and reinforcement learning model, and data-driven closed-loop adaptive calibration is completed. According to the method, the calibration pH value and the uncertainty thereof are output in real time through the two-channel Gaussian process model, and automatic balance is performed between prediction errors and resource consumption in combination with the reinforcement learning decision network, so that lag and waste of fixed period calibration are avoided, reagent, energy consumption and manual maintenance cost are remarkably reduced, and the overall operation efficiency of the system is improved.

The invention discloses a secondary battery charging method based on SOC optimization, and belongs to the technical field of secondary battery charging, and the method comprises the steps: collecting and preprocessing battery pack data, determining historical charging and discharging state marks, and extracting a dynamic polarization time constant and dynamic polarization resistance; superposing a lag correction compensation amount on a preset open-circuit voltage-state-of-charge mapping curve, and determining an initial state of charge; outputting a real-time charge state by using an extended Kalman filtering algorithm model; a recursive least square method with a forgetting factor is adopted to update the capacity reference of the real-time charge state, and a corrected charge state is obtained; calculating a negative electrode surface potential estimation value through a negative electrode potential estimation model based on a single-particle model architecture; and judging to output a maximum allowable charging current instruction and a current limit value dynamic adjusting instruction. According to the method, SOC estimation is accurately optimized, battery aging is adapted, the lithium precipitation risk is evaluated in a mechanism level, dynamic adjustment of the charging current is achieved, and the charging efficiency and the cycle life of the secondary battery are both considered.

The invention relates to the technical field of fine chemical engineering, and discloses a fuel cell cooling liquid and a preparation method thereof, and the preparation method comprises the following steps: preparation of a basic liquid, construction of a corrosion inhibition system, ion inhibition treatment, addition of a functional auxiliary agent and post-treatment. According to the composite corrosion inhibitor, zinc ions are anchored to gap sites of a silicate framework through the surface loading effect of sodium silicate and nano-zinc oxide under the shear dispersion condition, a compact composite passivation film is formed on the surface of a metal pipeline, and an electrode potential active area is covered; meanwhile, molybdate ions are subjected to a self-repairing reaction at the defect position of a passivation film preferentially by virtue of the oxidation-reduction characteristic of the molybdate ions, and formation of a galvanic corrosion microbattery is blocked by dynamically filling microcracks, so that the integrity of a corrosion inhibition system is improved; all the components of the composite corrosion inhibitor generate a synergistic effect in a specific proportion, so that the cooling liquid can maintain stable corrosion resistance for a long time.

The invention discloses a method and device for preparing metallic iron and oxygen through electro-deposition of lunar soil in a three-electrode fused salt system, and belongs to the technical field of metallurgy. The device comprises a threaded pipe sealing structure, a gas inlet and outlet structure, a reaction cavity, a crucible, a reaction cavity sealing cover and a three-electrode potential control system. The method comprises the following steps: adding chloride molten salt, a cosolvent and lunar soil / simulated lunar soil into a crucible; raising the temperature to a drying temperature in a simulated moon atmosphere, and keeping the temperature to remove moisture; continuously raising the temperature to the electro-deposition temperature, so that iron-containing components in the lunar soil / simulated lunar soil are fully dissolved; a three-electrode system is adopted for electro-deposition, high-purity metal iron is obtained at a working electrode, and oxygen is efficiently separated out at an auxiliary electrode. The reduction potential is accurately regulated and controlled through a three-electrode system, and synchronous and efficient separation of metal iron and oxygen in lunar soil / simulated lunar soil is achieved.

The invention relates to a lithium ion charging control method and device, equipment, a medium and a product. The method comprises the following steps: acquiring state information of a lithium ion battery to be charged; the state information comprises a negative electrode potential value and a battery temperature value of the lithium ion battery to be charged; determining at least one charging current threshold value in the charging process of the to-be-charged lithium ion battery based on the state information and a preset mapping relation; the preset mapping relation comprises a mapping relation among a battery temperature value, a battery cathode potential value and a charging current value; the preset mapping relation is obtained by performing a charging test on the to-be-tested lithium ion battery according to negative electrode potential boundary values of the to-be-tested lithium ion battery at different charging rates at different battery temperatures; and controlling the charging current of the lithium ion battery to be charged according to the at least one charging current threshold value. By adopting the method, the charging current threshold value can be dynamically adjusted according to the charging state of the lithium ion battery, so that the safety of the lithium ion battery during fast charging is improved.

The invention provides a negative pole piece which comprises a metal layer and a silicon interface layer located on at least one side of the metal layer, the silicon interface layer comprises a material with the general formula of SiOx, x is larger than or equal to 0 and smaller than or equal to 2, and in the thickness direction of the silicon interface layer, the oxygen content of the portion, close to the metal layer, of the silicon interface layer is lower than the oxygen content of the portion, away from the metal layer, of the silicon interface layer. Compared with a metal layer, the silicon interface layer has higher negative electrode potential, formation and growth of dendritic crystals can be inhibited, and improvement of the cycle performance of the battery is facilitated.

The application relates to the technical field of a vanadium redox flow battery, in particular to a circular structure reference battery for monitoring electrode potential, which comprises an electrochemical unit and two circular units. The electrochemical unit comprises a proton exchange membrane and electrode assemblies symmetrically arranged on two sides of the proton exchange membrane; the two circular units are symmetrically arranged on the two sides of the proton exchange membrane, a closed electrode cavity is formed between the circular unit and the proton exchange membrane, the electrode assemblies are arranged in the electrode cavity, a plurality of liquid inlet hole groups uniformly distributed in the circumferential direction are arranged on the circular unit, the plurality of liquid inlet hole groups are communicated with the circumferential edge of the electrode cavity; a liquid outlet assembly is arranged on the circular unit, the liquid outlet assembly is communicated with the central area of the electrode cavity, one end of the liquid outlet assembly extends out of the circular unit, electrolyte enters from the circumferential edge area of the electrode cavity through the plurality of liquid inlet hole groups, flows radially to the central area of the electrode cavity, and then flows out from the liquid outlet assembly. The application has the effects of providing a uniform flow field and ensuring stable and reliable signals.

Disclosed are a negative electrode plate and use thereof. For the negative electrode plate provided in the present disclosure, a negative electrode active layer is coated with a safety function layer containing metal and ceramic, which effectively improve an electrode potential of a negative electrode and a nucleation energy barrier of metal lithium of a lithium-ion battery in a charging process at a low temperature and a high rate, thereby avoiding occurrence of a lithium precipitation phenomenon at the negative electrode. Because of good heat insulation performance of the ceramic, occurrence of a thermal runaway phenomenon in a nail penetration test may be effectively avoided, and safety performance of the battery may be improved. When the negative electrode plate is applied to the lithium-ion battery, the obtained lithium-ion battery has advantages of good cycling performance and high security.

The invention discloses an electrocatalytic ammonia synthesis system, which comprises a power supply module; the electrode partitions in the electrolytic bath are arranged into a core area electrode in the middle and an edge area electrode on the peripheral edge, and a negative electrode is connected with an edge electrode in a cathode chamber of the electrolytic bath through a shunt; the dynamic sulfur circulating unit is used for monitoring the potential offset of an electrode in the electrolytic cell and dynamically injecting an ammonium thiocyanate solution into a cathode chamber of the electrolytic cell according to the potential offset; and the current density partition control unit is used for controlling the current density of the current output by the power supply module to the core area electrode and the edge area electrode respectively. According to the invention, the essential problem of high nitrogen activation energy barrier is solved, the technical bottleneck of unsustainable proton transmission is overcome, the engineering limit adapted to wind-light-electricity fluctuation is broken through, the aperture control precision of the molecular sieve is improved, the sulfur vacancy regeneration efficiency is improved, the system fluctuation adaptability is optimized, and the current density tolerance upper limit is expanded.

The utility model relates to a three-electrode lithium ion battery, and belongs to the technical field of lithium ion batteries. The three-electrode lithium ion battery comprises a positive plate, a negative plate, a reference electrode and a diaphragm, the negative plate comprises a negative current collector and a negative active layer arranged on the negative current collector; the negative electrode active layer comprises a first active material layer and a second active material layer, the first active material layer is arranged on the negative electrode current collector, and the second active material layer is arranged on the first active material layer; the reference electrode comprises a first reference electrode and a second reference electrode; the first reference electrode is arranged between the first active material layer and the second active material layer; the second reference electrode is arranged on the second active material layer; and at least parts of the first reference electrode and the second reference electrode are positioned outside the negative plate. The reference electrode in the battery can avoid deviation of positive and negative electrode potentials caused by loss of active lithium, and can accurately monitor the top negative electrode potential and the bottom negative electrode potential.

The application discloses an electrolyte analyzer maintenance liquid and a preparation method thereof. The maintenance liquid comprises cleaning components, electrode protection components, a buffer system, a preservative and a solvent. The cleaning components comprise a decomposition enzyme and a chelating agent, and the electrode protection components comprise inorganic salts, stabilizers and protective agents. Through the synergistic effect of the cleaning components, the electrode protection components, the buffer system and the preservative, the dual effects of cleaning and electrode protection of the electrolyte analyzer flow path can be simultaneously achieved. The decomposition enzyme in the cleaning components can decompose biological pollutants on the flow path and the electrode surface, the chelating agent can chelate metal ions, dissolve metal salt deposits and prevent inorganic salt fouling. The electrode protection components can maintain the stable potential of the electrode after the cleaning components remove the pollutants, prevent the electrode potential from drifting and prolong the service life of the electrode. The electrolyte analyzer maintenance liquid is mild and non-corrosive, avoids damaging the electrode sensitive film, is safe and environmentally friendly, does not release heavy metals and is easy to produce and prepare.

The present invention discloses a method and system for optimizing the electrode open circuit potential based on the electrochemical model of a lithium battery. First, the electrode potentials under equal interval concentrations are fitted to obtain the positive electrode equilibrium potential and the negative electrode equilibrium potential. Then, the positive electrode equilibrium potential and the negative electrode equilibrium potential are used to obtain the lithium battery open circuit voltage. Subsequently, the lithium battery electrochemical model is established according to the lithium battery open circuit voltage. The present invention realizes the function of introducing the lithium battery electrochemical model to remove polarization interference, and can significantly improve the fitting performance of the model in the drastic change area of ​​the OCP curve and improve the overall fitting accuracy of the lithium battery electrochemical model by weighted optimization of the region with large OCP curvature. At the same time, by step-by-step optimization of the positive and negative electrode OCP functions and keeping other parameters fixed, the optimization dimension can be effectively reduced and the fitting stability can be improved. The present invention not only has long-term availability, but also has good versatility and engineering expansion space, and is suitable for wide promotion and use.

A potentiostat architecture includes one or more feedback loops configured to regulate and maintain electrode potentials while measuring a sensing current. At least one of the feedback loops include a comparator configured to sense a voltage difference and output a signal based on the voltage difference, a digital loop filter configured to receive the signal from the comparator and output feedback digital bits related to a control, and a digital to analog convertor configured to receive the signal from the comparator and output feedback digital bits related to a control.

The invention relates to the technical field of vehicles, and discloses a circuit conduction assembly and a vehicle, the circuit conduction assembly is suitable for being electrically connected with a vehicle body conductive part, the vehicle body conductive part comprises a first element, and the standard electrode potential of the first element is E1; comprising a conductive terminal, the conductive terminal comprises a second element, the standard electrode potential of the second element is E2, and E2 is larger than E1; the insulating part is arranged between the vehicle body conductive part and the conductive terminal in an insulating manner so as to prevent direct contact between the vehicle body conductive part and the conductive terminal; and the conduction piece is connected with the vehicle body conductive part and the conductive terminal and comprises a third element, the standard electrode potential of the third element is E3, and E3 is larger than E1 and smaller than E2. According to the circuit conduction assembly provided by the invention, the conductive part of the vehicle body is isolated from the conductive terminal by using the insulating part, the occurrence of galvanic corrosion is inhibited, the conduction part is used as a bridge of a current path, and the conduction part selects a third element of which the standard electrode potential E3 is between E1 and E2, so that the occurrence probability of galvanic corrosion is reduced.

The present invention discloses a multi-scale electromagnetic exploration method based on single-electrode potential detection, which relates to the field of exploration geophysical technology. The method includes: determining the measurement area, clarifying the exploration target, and determining the measurement area and measurement point density based on the depth of the exploration target; deploying a number of transmitting sources and receiving arrays in the measurement area to collect surface potential data of the measurement area in real time, and processing the data frequency by frequency according to a preset frequency sequence; generating a surface potential distribution surface based on the single-electrode potential data, constraining and suppressing the field source effect, obtaining electric field distribution information of the measurement surface, and calculating apparent resistivity parameters in combination with magnetic field measurement data; using a multi-directional excitation mode and a multi-source emission scheme to suppress the field source effect, and constructing a three-dimensional resistivity profile to identify low-resistance or high-resistance bodies. The present invention solves the static effect and volume effect, breaking through the limitations of existing electromagnetic instruments on detection accuracy and depth.

The invention relates to a rivet nut and a riveting structure, the rivet nut comprises a nut body and a separator, and the separator is used for separating the nut body from a connected plate when the nut body is connected with the connected plate; wherein the standard electrode potential difference between the matrix metal of the nut body material and the matrix metal of the separator material, and the standard electrode potential difference between the matrix metal of the separator material and the matrix metal of the connected plate material; and the standard electrode potential difference is smaller than the standard electrode potential difference between the matrix metal of the nut body material and the matrix metal of the connected plate material. The rivet nut is provided with the isolation piece, the large potential difference generated when the nut body makes direct contact with the connected plate is converted into the small potential difference between the nut body and the isolation piece and the small potential difference between the isolation piece and the connected plate, electrochemical corrosion is shared through the isolation piece, and therefore the reliability of the rivet nut is improved. The corrosion degrees of the nut body, the connected plate and the isolation piece are reduced, and the service life of the rivet nut and the service life of a riveting structure are effectively prolonged.

The invention discloses a non-intrusive sewage pH measuring method based on an electrical impedance tomography technology, which comprises the following steps of: based on an electromagnetic field theory, acquiring a sewage boundary electric signal through the electrical impedance tomography technology, establishing theoretical correlation between pH and electrode potential by combining a Nernst equation, constructing a constitutive equation, and finally, inverting a pH value by measuring the boundary electric signal, so as to measure the pH value of the sewage. Therefore, a measurement mode which does not need to intrude into a pipeline and avoids pollution and interference is realized, the defects that a traditional electrode is fragile and difficult to miniaturize, and an optical fiber sensor is easily disturbed by the environment and is complex in high-precision assembly are overcome, the influence of the complex environment of a water body is avoided, and the measurement and calculation precision of the pH is improved.

The invention discloses an anti-corrosion control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, a sacrificial anode and an auxiliary anode are arranged at a protected metal part of the air conditioner, and the sacrificial anode can spontaneously output current through an electrode potential difference; the auxiliary anode is used for outputting controllable current and comprises a constant potential output mode, a constant current output mode and an intermittent current output mode; the constant potential output mode can adjust the controllable current, so that the surface potential of the protected metal part is stable; the constant current output mode can fix the controllable current at a preset current value; the intermittent current output mode can control the output and stop of the controllable current; the method comprises the steps that corrosion related parameters of the environment where the air conditioner is located are obtained, and the corrosion risk level of the current environment is evaluated according to the corrosion related parameters; and controlling the current output mode of the auxiliary anode and the starting state of the sacrificial anode according to the corrosion risk level. Therefore, the adaptive capacity of the air conditioner anti-corrosion strategy to the outdoor corrosion risk is improved.

A method for improving the accuracy of pH value detection using an antimony-based pH electrode, belonging to the field of pH value detection technology, includes: measuring the dissolved oxygen concentration of the test solution; comparing this dissolved oxygen concentration with the dissolved oxygen concentration of the standard buffer solution used during pH sensor calibration; when the two dissolved oxygen concentrations differ, dissolved oxygen potential compensation is required: multiplying the difference between the two dissolved oxygen concentrations by a dissolved oxygen concentration compensation coefficient to obtain a dissolved oxygen potential compensation value; and using this dissolved oxygen potential compensation value to compensate the electrode potential of the antimony-based pH electrode in the test solution, thereby achieving accurate pH value measurement. This invention improves the measurement accuracy of the antimony-based pH electrode and the accuracy of in-situ pH value monitoring results through dissolved oxygen potential compensation.

The application relates to a double-layer polymer film-based rechargeable moisture power generation device and a preparation method thereof, and belongs to the technical field of moisture power generation. The device comprises an active electrode, a double-layer polymer film and an inert porous electrode which are sequentially arranged, wherein the first layer polymer film of the double-layer polymer film is a mixture of iron hydroxide, polystyrene sulfonic acid and polyvinyl alcohol, the second layer polymer film is polydiallyldimethylammonium chloride, the first layer polymer film is in contact with the active electrode, and the second layer polymer film is in contact with the inert porous electrode; the material of the active electrode is a metal with a standard electrode potential of-1V to +0.5V, and the material of the inert porous electrode is a metal with a standard electrode potential greater than +1V. Through moisture evaporation and redox reaction, the battery can generate power spontaneously in a moisture environment, and can be self-repaired through the redox reaction when the performance decreases, so that the charging effect is realized.

A method for determining the presence of chromium-6 (Cr-6) in a solid sample is described, comprising the steps of contacting the solid sample with a destruction liquid under conditions in which the Cr-6 of the solid sample dissolves in the destruction liquid as a chromate, providing a test solution; subjecting the test solution obtained in step (1) to a specific Cr-6 detection reaction, under conditions in which the presence of Cr-6 is detected; and detecting whether the specific Cr-6 reaction occurred in step (2); wherein the destruction liquid comprises an oxidant, which has a standard electrode potential E0 higher than the chromate.

The application belongs to the field of electrochemistry, and particularly relates to a method for electrochemically extracting lithium from a retired lithium battery with the assistance of a pseudo-capacitance cathode, comprising the following steps: a) providing an anode electrode and a cathode electrode; the anode electrode is an anode electrode made of recycled retired lithium battery positive electrode material, or is a retired lithium battery positive plate; the cathode electrode contains Prussian blue analogues, the Prussian blue analogues are prepared by mixing and reacting citrate, transition metal salt and cyanide in water, and the transition metal salt is one or more of cobalt salt, iron salt, copper salt and nickel salt; b) immersing the anode electrode and the cathode electrode into an electrolyte, and performing electrochemical lithium extraction by electrification. In the method, the pseudo-capacitance material with lithium discharge characteristics is used as the cathode to replace the commonly used metal plate or carbon material, the pseudo-capacitance reaction with a more positive electrode potential is used to replace the hydrogen evolution reaction on the cathode of the existing system, and finally the low-energy-consumption and high-selectivity recovery of lithium is realized.

The invention discloses a design method for improving corrosion resistance of a copper-nickel alloy by adding alloy elements. The design method comprises the following steps: screening the alloy elements; the first screening condition is that the solid solubility of the to-be-added alloy element in the copper-nickel alloy is larger than 0.1 wt.%, the second screening condition is that the standard electrode potential of the to-be-added alloy element is smaller than that of Ni, the third screening condition is that the deposition line of the to-be-added alloy element is lower than that of Cu2O, and the fourth screening condition is that the to-be-added alloy element is non-noble metal; based on the screening result, the mass percentage content range of the alloy elements is determined according to the maximum solid solubility of the alloy elements in the copper-nickel alloy; the ratio of the nucleation rate to the growth rate is larger than 104, and the corrosion rate is stabilized to be not higher than 0.02 [mu] m / a along with time, and the mass content of the alloy elements is obtained through optimization; and the final components and content of the added alloy element copper-nickel alloy are determined on the basis of the optimization result, and the corrosion resistance of the alloy element copper-nickel alloy is verified through experiments. The invention provides a design thought for the corrosion-resistant alloy with slowly dissolved main elements.

The application relates to the technical field of electrochemical detection, and specifically discloses an ammonium sulfate PH calculation method based on an electrochemical principle and a temperature compensation technology, which comprises the following steps: collecting a non-standard state electrode potential signal and an NTC thermistor real-time resistance signal of an ammonium sulfate solution to be measured; using an improved temperature fitting algorithm based on a temperature-resistance nonlinear relationship and an optimized fitting process to convert an actual thermodynamic temperature of the solution; combining the actual thermodynamic temperature to compensate the non-standard state electrode potential signal, eliminating the interference of temperature change on the potential measurement; and substituting the compensated electrode potential value and the thermodynamic temperature into a simplified expression of the Nernst equation to inversely solve the hydrogen ion concentration, and then obtaining the final PH value of the ammonium sulfate solution through negative logarithm operation. The method optimizes the temperature fitting precision and the electrode potential compensation adaptability, and improves the PH measurement deviation problem of the ammonium sulfate solution.

A method (10) for protecting leadframe, a leadframe composite (20), a box (26) and an outside container (34) are provided. The method (10) includes: step (12), providing a leadframe (22) of a first standard electrode potential; step (14), providing a protection material (24) of a second standard electrode potential, the second standard electrode potential being lower than the first standard electrode potential; and step (16), contacting the protection material (24) with the leadframe (22) so that the protection material (24) acts as a sacrificial anode to protect the leadframe (22) as a cathode from corrosion / oxidization. Embodiments of the present disclosure may help to protect the leadframe (22) without changing the alloying condition of the leadframe (22), without increasing the processing cost of the leadframe (22), etc.

The application discloses an antibacterial composite metal coating based on protective area etching and galvanic corrosion and a preparation method and equipment thereof, and the method comprises the following steps: 1) forming a composite coating by vapor depositing a metal transition layer with a standard electrode potential higher than silver, a silver island intermediate layer and electrochemically depositing a silver layer on the surface of a pretreated titanium-based equipment; 2) performing isolation line etching on the outside of the coating area boundary of the equipment surface by laser; 3) preparing a hydrophobic protective coating on the surface of the reserved coating area; 4) filling paraffin in the isolation line groove to form a temporary hole sealing layer; 5) immersing the equipment in an acidic electrolyte to selectively dissolve the coating in the to-be-stripped area in a sectional stripping mode; 6) removing the paraffin in the isolation line groove and performing trimming by laser; and 7) obtaining the coating material after mechanical polishing, cleaning, drying, vacuum packaging and radiation sterilization. The high-strength coating can realize efficient sterilization through the galvanic corrosion effect and prevent coating abrasion during use.