12 results about "Electrochemical potential" patented technology

The present invention supports design by enabling the checking of a determination rule in consideration of material-specific characteristics or physical properties, and enabling, in the design stage, the evaluation of corrosion resistance and durability of a product to be designed.　This design support system defines a determination rule related to a combination of component materials, recognizes an adjacent component on the basis of a feature value acquired from information of a model to be designed by using a predetermined function associated with the determination rule, and determines the suitability of the combination of the materials by using the material of the adjacent component and first material determination information in which a theoretical value related to the combination of the materials is registered. The determination rule includes a threshold value of an electrochemical potential, and a theoretical value of the electrochemical potential is registered in the first material determination information. It is determined whether the combination of the materials in the adjacent component conforms to the determination rule on the basis of comparison between the theoretical value of the electrochemical potential corresponding to the combination of the materials of the adjacent component and the threshold value of the determination rule.

The application discloses a kind of electrochemical potential step transient test method and system for high temperature and high pressure diffusion control.The system includes high temperature and high pressure reactor, integrated three-electrode test unit, multistage sealing assembly, safety control subsystem and data acquisition unit;Multistage sealing assembly adopts conical surface sealing-high temperature ceramic insulation-back end hydraulic compensation composite design, to ensure the sealing and insulation reliability under high temperature and high pressure;Integrated three-electrode test unit is modular probe structure.When testing, inject corrosion solution into the kettle and heat up to target working condition, apply potential step signal to excite diffusion-controlled transient current response, and analyze test curve based on Cottrell equation and porous medium diffusion model.The application can in situ quantitatively obtain diffusion coefficient, porosity and effective thickness and other key parameters under the condition of 120-250 DEG C, 2.7-350 bar, to provide data support for metal component corrosion risk assessment.

The present invention relates to a medical electrode, including: a first layer made of a first material having a first electrochemical potential window, especially a first charge injection limit, and at least one second layer made of a second material having a second electrochemical potential window, especially a second charge injection limit, wherein the first layer and the second layer are located on a base substrate, wherein the second electrochemical potential window is lower than the first electrochemical potential window, and wherein the first layer is provided on top of the second layer and encapsulates the second layer, so that no electrical current directly flows from the second layer toward a target tissue.

Disclosed are an abrasion-resistant anti-corrosive coating, and a preparation method and a use thereof. The abrasion-resistant anti-corrosive coating is prepared from a component A and a component B. In the component A, a polyurethane (PU) resin is used as a film-forming material in combination with a corrosion inhibitor, an abrasion-resistant filler, and a body filler. On the basis of the abrasion resistance of the PU resin, the corrosion inhibition of the corrosion inhibitor and the high abrasion resistance of the abrasion-resistant filler improve the abrasion resistance of a coating layer. The use of the body filler reduces a cost of the coating. A thixotropic agent makes the coating have high storage stability. The coating does not include metal components, which avoids an electrochemical potential difference between a coating layer and an alloy, such that the corrosion of the alloy can be effectively controlled.

The application provides a monitoring method and device for monitoring salt release capacity of a brine well in situ, and belongs to the field of hydrogeological monitoring. In view of the problem that the prior art is difficult to distinguish the salt source and release horizon, the application is based on the natural potential detection technology in the well, especially suitable for monitoring the salt release of the weakly permeable layer in the coastal brine mining area, so as to implement the in-situ and layered dynamic monitoring of the salt release of different horizons of the brine well, thereby simplifying the construction means, reducing the monitoring cost and having a good popularization and application prospect. Specifically, an electrical cable is vertically arranged along the well wall in the pumping well, a plurality of electrodes are arranged on the electrical cable at intervals, and the electrical cable is tightly attached to the well wall through a fixing mechanism; the natural potential data on the vertical profile are collected, the electrochemical potential change caused by the salt release is utilized, the potential anomaly at different depths is captured, the dominant horizon of the salt release in the weakly permeable layer is located and identified, and the relative rate of the salt release of each horizon is inversely estimated.

The application discloses a kind of Mg-Li-Gd-Ni alloy based on LPSO / matrix potential difference accurate regulation and control degradation rate and preparation method and application;Belong to metal material technical field.The present application solves the problem that the degradation rate of existing magnesium-lithium alloy is difficult to accurately control in degradable application.The alloy composition of the present application is as follows, by mass percentage:Li:8%, Gd:1-5%, Ni:0.25-1.25%, the balance is Mg.The stable electrochemical potential difference exists between the LPSO phase and the magnesium-lithium matrix of the present application, the potential difference is maintained in the range of 750-850 mV, and does not change with the change of LPSO content.The volume fraction and distribution of LPSO phase can be changed by controlling the content of Gd and Ni, and the degradation rate can be accurately controlled by increasing the area of cathode phase without changing the unit galvanic corrosion intensity.The degradation rate of the alloy of the present application can be continuously adjustable in the range of 0.09-0.23 mg / cm 2 ·min, and the degradation behavior has excellent temperature response characteristics, especially suitable for oil and gas well fracturing operation with accurate requirement for degradation time.

This invention provides a modified lithium-ion battery silicon anode binder and its applications in anode sheets and batteries, belonging to the field of lithium-ion batteries. This invention utilizes chitosan as the main chain, pre-assembling it with a crosslinking agent integrating dual functional units of ion concentration sensing and electrochemical potential response. By leveraging the concentration gradient during electrode pretreatment to drive spontaneous crosslinking and gradient network formation, a smart binder with gradient structure and potential-triggered dynamic adjustment capabilities is prepared. This binder is used in the preparation of silicon anode sheets and the assembly of lithium-ion batteries, solving the problems of existing binders' inability to adaptively coordinate the requirements of high-elasticity buffers and rigid ion channels, their inability to suppress dendrite growth at high rates, and their difficulty in balancing long-cycle stability and high-rate safety. This anode binder can be used to prepare high-rate fast-charging lithium-ion battery silicon anodes, possessing great development potential in high-end power batteries and energy storage systems.

The present application relates to the technical field of industrial process automatic control, and especially relates to an aluminum alloy melt on-line degassing multi-parameter collaborative control method, which comprises collecting hydrogen atom diffusion flux, electrochemical potential and impedance real part signal, constructing a multi-field coupling state tensor through space-time alignment; setting up a dynamic cross-coupling Jacobian matrix, triggering matrix update by using impedance real part signal change rate, and establishing a prediction model to quantify the interference of control variables on hydrogen diffusion flux; inputting the state tensor into the prediction model to deduce evolution trajectory, and obtaining optimal control increment sequence by solving the target optimization function; and then collaboratively adjusting gas flow, bias voltage, stirring speed and vibration frequency. The present application realizes global optimization of melt electrochemistry and fluid dynamics state, eliminates system oscillation caused by single parameter adjustment, and improves the adaptability and quality stability of the degassing process.

This system allows for the checking of judgment rules that take into account the inherent properties or physical characteristics of materials, thereby supporting the design process by enabling evaluation of the corrosion resistance and durability of the product being designed at the design stage. [Solution] The design support system defines a judgment rule regarding the combination of component materials, recognizes adjacent components based on feature quantities obtained from the model information of the design target using a predetermined function linked to the judgment rule, and determines the suitability of the material combination using the material of the adjacent component and first material judgment information which has registered theoretical values ​​regarding the material combination. The judgment rule includes a threshold value for electrochemical potential, and the first material judgment information has registered theoretical values ​​for electrochemical potential. Based on a comparison between the theoretical value for electrochemical potential corresponding to the material combination of the adjacent component and the threshold value of the judgment rule, it determines whether the material combination in the adjacent component conforms to the judgment rule.

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent includes a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at a room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane,. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes, techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

The invention relates to a metallic mold (1) for casting a fresh concrete mix, a method for protecting such a mold (1) against corrosion, and a method for producing a concrete product by casting fresh concrete into such a mold. The mold (1) comprises at least one wall (3) delimiting a receiving volume (4) for the mix (7) and is characterized in that the side wall (3) has an inner face (30) provided, in whole or in part, with a coating composed of a metallic film (5) having a lower electrochemical potential than the mold material (1) and a layer of an electrolytic material (6) ensuring the adhesion of the metallic film (5) to the mold (1) so as to protect from corrosion a surface exposed to the concrete mix cast into the receiving volume that is adjacent to the wall. Figure to be published with the abstract: Fig. 1

The application relates to the technical field of water quality monitoring, in particular to an electrochemical array electrode for comprehensive water quality online monitoring; the electrochemical array electrode comprises a substrate layer, a conductive wiring layer and an insulating shielding layer, and is provided with electrodes on the substrate layer; the electrodes comprise multiple working electrodes, a counter electrode and a reference electrode; the conductive wiring layer is provided with pins; the pins are electrically connected with the corresponding electrodes through wires. The multiple working electrodes are integrated on the same small substrate, high-throughput, multi-parameter synchronous real-time detection is realized, the volume of the sensor is greatly reduced, the sensor is suitable for online, trace and portable water quality monitoring scenes, the L-shaped reference electrode ensures that the physical distance and solution resistance from any working electrode to the reference electrode are basically consistent, the uniformity of the electrochemical potential distribution of each channel in the working electrode is ensured, and the signal error between the channels is reduced.