56 results about "Anode polarization" patented technology

The disclosure provides a double-layer anode structure on a pretreated porous metal substrate and a method for fabricating the same, for improving the redox stability and decreasing the anode polarization resistance of a SOFC. The anode structure comprises: a porous metal substrate of high gas permeability; a first porous anode functional layer, formed on the porous metal substrate by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying process; and a second porous anode functional layer, formed on the first porous anode functional layer by a high-voltage high-enthalpy Ar—He—H₂—N₂ atmospheric-pressure plasma spraying and hydrogen reduction. The first porous anode functional layer is composed a redox stable perovskite, the second porous anode functional layer is composed of a nanostructured cermet. The first porous anode functional layer is also used to prevent the second porous anode functional layer from being diffused by the composition elements of the porous metal substrate.

The invention relates to a preparation method of a bioactive protein or polypeptide coat biological bracket. The method of anode polarization is adopted, a bracket body is taken as the anode, and is inserted into bioactive protein or polypeptide solution together with the cathode; under the action of the electric field of a power supply, the bioactive protein or polypeptide is ionized to have negative electrification to move towards the anode of the bracket and evenly coats on the surface of the bracket. The preparation method provided by the invention dose not need to additionally prepare a medicine loading coat, has no obvious interface, can envelop a bioactive protein or polypeptide coat on the whole bracket body or part surface of the bracket through the function of anode polarization; the bioactive protein or polypeptide has stable enveloping amount and is not easily eluted, has safe use, simple operation and low cost, and is suitable for large-scale production in industry.

The method for modifying the surface of rustless steel belongs to the metal surface processing technique. The method comprises the steps of: pre-processing a rustless steel product through a normal method and then taking the rustless steel product as an anode to carry out anode polarization treatment, wherein the treatment process is to process the surface of the rustless steel by adding citrate and nitrate additive into electrolyte solution of citric acid and boric acid and controlling the current concentration and the polarization time. The corrosion resistance of the rustless steel product processed through the method is greatly improved while the self physical properties such as the surface color, the lustrousness, the strength, the electricity conductivity, the heat conductivity and the like are not changed. The method has simple technique and equipment and convenient operation, and is easy to industrialize.

The invention relates to a method for preparing the dielectric film of aluminum electrolytic capacitor. First, processing pretreatment on the anode foil; processing anode polarization inside the ion liquid to attain the dielectric film. The invention has better corrosive resistance, and its voltage resistance can reach 90V. The invention is easy and clear, and the aluminum electrolytic capacitor made from said invention has high safety and the voltage resistance more than 40V.

The invention discloses an electrolyte for an aluminum-air battery and the aluminum-air battery, and the battery comprises an aluminum alloy negative electrode, an air positive electrode and the electrolyte. The aluminum alloy negative electrode contains the following raw materials in percentage by weight: 2.0-8.0% of Al, 0.02-0.08% of Pb, 0.05-0.1% of In, 0.01-0.1% of Ga, and 0.1-2.0% of Mg. According to the electrolyte for the aluminum-air battery and the aluminum-air battery, an electrolyte corrosion inhibitor is added into the electrolyte to promote precipitation of aluminum hydroxide, thereby avoiding the anode passivation caused by a condition that aluminum hydroxide is not discharged in time, and guaranteeing the normal work of the battery. The aluminum alloy negative electrode contains Al, Pb, In, Ga and Mg, so the open-circuit potential is obviously reduced, the self-corrosion is reduced, the electrode surface corrosion and dissolution are uniform, a passive film is not likelyto be formed in an alkaline medium, and anode polarization is reduced. Manganese dioxide is adopted in an air positive electrode to serve as a catalyst, so the price is low, and the good applicationprospect is achieved.

The invention relates to a surface roughening method of a metal material. According to the method, the metal material is subjected to anodic polarization in an electrolyte; the surface roughness of the metal material is increased by the anodic dissolution effect; the electrolyte is a water-based solution of sodium chloride of 0.02 to 100 g/L; and the anodic polarization mode is to externally add current or couple a cathodic dissimilar metal material. The method has the biggest advantages of environmental friendliness, high efficiency, energy conservation and low cost.

The invention relates to an oil field oil water well casing outer corrosion protection technique applied in epoxy cold taping and zinc anode. Its feature is adopting combining technique of using anticorrosion coating and epoxy cold taping to isolate casing outer corrosive medium and affording protecting current for the casing by sacrificed anode polarization. The anticorrosion coating includes epoxy coal pitch and epoxy cold taping. The sacrificed anode is zinc alloy. Each component weight percentages are that Fe 0.0023%, Cu 0.005%, Pb 0.0044%, Si less than 0.01%, Al 0.55%, Cd 0.072%, rest Zn. The standard is 168*142*500. The distributions are that each 100m is one group; each group has five branches, which is set on the casing by locking device. The technique is applied in oil field underground casing corrosion damage, solves the problem that impressed current cathode protection needs power supply.

The invention belongs to the technical field of electrolytic copper foil production, and particularly relates to double-face light ultrathin electrolytic copper foil for a lithium battery and a preparing method of the double-face light ultrathin electrolytic copper foil. The method comprises the following steps that a titanium anode coated with a platinum family metal element or oxide of the platinum family metal element and a titanium cathode barrel are provided; the titanium anode and the titanium cathode barrel are immersed in a pretreatment composition containing gelatin and one or more organic sulfide sulfonate; anode polarization and cathode polarization are used for activating the surface of a titanium cathode; and a copper electrolyte is utilized for preparing the electrolytic copper foil on the activated surface of the titanium cathode. According to the method, the more uniform and cleaner titanium anode and the more uniform and cleaner titanium cathode are provided, the pretreatment composition wraps the surface of a base body before electrolytic copper foil production, and it is ensured that high surface additive concentration is achieved at the early stage of electrolysis.

The invention discloses a biological medical controllable all-degradable material and a preparation method thereof. The preparation method of the material comprises the following steps: 1) smelting and forming; 2) anodic polarization; and 3) coating. The material disclosed by the invention comprises a pure magnesium or magnesium alloy base and a functional film covered on the base surface with degradation protection and self-degradation characteristics; and the integral material has the characteristic of controllable all-degradable absorption, and satisfies the serious requirements for ideal characteristics of degradable biological materials. The invention provides a preferred scheme for solving the contradiction between biodegradable characteristic utilization and degradation rate control of the absorbable biological material, especially medical magnesium alloy; and the related material and technique are not only suitable for common medical appliance products, but also have competitive edges in manufacturing of high-end medical appliance products, such as implantation instruments, especially secondary-operation-free implantation substances.

The invention discloses a PN junction memory device based on ferroelectric doping, and mainly aims to solve the problem that the existing PN junction memory device cannot realize switching of different conduction types. The device comprises a substrate (1), an insulating oxide layer (2) and a channel layer (3) from bottom to top, an anode (8) and a cathode (9) are arranged on two sides of the channel layer, an anode polarization grid (4) is arranged on the left of the upper portion of the channel layer, and a cathode polarization grid (5) is arranged on the right of the channel layer; an anode polarization electrode (6) and a cathode polarization electrode (7) are arranged on the upper portion of the anode polarization grid and the upper portion of the cathode polarization grid respectively, pulse voltages with different polarities are applied to the two polarization electrodes (6 and 7), and switching of PN junctions between different storage states is achieved by changing the application sequence of positive and negative pulses. According to the invention, the storage function of the PN junction memory device is expanded, the damage to the channel in the technological process is reduced, the power consumption is reduced, the on-state current and durability of the device are improved, and the method can be used for manufacturing a nonvolatile memory.

The invention relates to a method for preparing a gene-coated medical apparatus. The method utilizes the anode polarization principle, uses a medical apparatus body as an anode, and places the anode and the cathode of a power supply into solution of gene or oligonucleotide for anode polarization reaction so as to obtain the medical apparatus of which the surface carries a gene coating. The method is simple and feasible, does not need to introduce matrix loaded with the gene, and avoids inflammation and side effects brought by the substrate; the apparatus body is evenly coated with the gene or the oligonucleotide, the gene or the oligonucleotide coating has good stability, the activity is not influenced by a technical process, and the gene or the oligonucleotide is easily and slowly released into vascular cells so as to express in vascular wall cells; and the medical apparatus can prevent and treat inflammation reaction and restenosis in the medical apparatus more effectively.

The present invention relates to a kind of HPbO in alkaline solution ₂ ^- The invention relates to a method for measuring and calculating oxidation reaction rate constants and diffusion coefficients, belonging to the technical field of lead oxide preparation. First, a three-electrode system was adopted and the Pt disc electrode was placed on HPbO ₂ ^- Then adjust the rotating speed of the Pt disc electrode respectively and obtain the test anodic polarization curve under the rotating speed in the alkaline solution of different Pt disc electrodes; The current value corresponding to the potential of 0.7V in the rotation speed, the reciprocal of the current value I ^-1 The reciprocal ω of the square root of the rotational angular velocity of the Pt disk electrode ^-1/2 A linear fit is performed, and the fitted straight line uses the Koutecky-Levich equation I ^-1 =(nAFKC) ^-1 +1.61(nAFC) ^-1 D. ^-2/3 ν ^1/6 ω ^-1/2 Represented by calculating the intercept value H and slope value S of the fitted straight line to calculate the reaction rate constant K and diffusion coefficient D respectively. This calculation method can more accurately test the HPbO in alkaline solution ₂ ^- Oxidation reaction rate constants and diffusion coefficients.

The invention belongs to the technical field of lithium ion batteries and particularly relates to an anode piece of a lithium ion battery. The anode piece comprises an anode current collector and an anode diaphragm coated on the anode current collector; the anode diaphragm comprises an anode active substance, a bonding agent and a conductive additive; the anode diaphragm further comprises a positive temperature coefficient material which is (VmR1-m)2)3, wherein R is at least one of Cr, Ba, Al, In, Ga, Sr and Pb, and m is not smaller than 0.5 and not more than 1; and the positive temperature coefficient material accounts for 4.5-30% relative to the total weight of the anode diaphragm. According to the invention, because the anode piece comprises the positive temperature coefficient material, the impedance of the anode diaphragm increases at high temperature to result in the increase of anode polarization, in a charging process, anode potential decreases, corresponding anode oxidation capacity decreases therewith, and thus, the high-temperature cycle performance of the lithium ion battery is increased. In addition, the invention further discloses a lithium ion battery comprising the anode piece.

The invention discloses a preparation method of a titanium-coated aluminum-based beta-PbO2-graphene composite electrode and belongs to the technical field of composite electrodes. According to the preparation method, graphene is subjected to covalent bond functionalization treatment, and then a covalent bond functionalized nano-graphene/lead nitrate-sodium fluoride-nitric acid plating solution isprepared, a pretreated cylindrical titanium-coated aluminum serves as an anode and rotates around the axis of the pretreated cylindrical titanium-coated aluminum, a stainless steel ring serves as a cathode, and graphene beta-PbO2 is electroplated under the condition of anode polarization to obtain the cylindrical titanium-coated aluminum-based beta-PbO2-graphene composite electrode. A graphene beta-PbO2 electrode coating prepared according to the preparation method is dense in crystal, is in gray-black, has the thickness of 100-200 mum, and is high in electrocatalysis activity and corrosion resistance.

The invention relates to an electrochemical method and device for structural steel designation sorting. The invention mainly aims to provide an electrochemical method for rapid and accurate sorting ofstructural steel designation and a device for realizing the method. The method is characterized by mainly comprising the following main steps: conducting electrochemical experiment on structural steel with unknown designation, performing measurement to obtain an anode polarization curve of the structural steel with unknown designation in a special electrolyte solution, analyzing characteristic parameters of the anode polarization curve, then carrying out comparison with standard anode polarization curve characteristic parameters of structural steel with known designation in a standard sampledatabase, and performing recognition, thus obtaining the designation of the steel. The device comprises an electrochemical testing module and a polarization curve recognition module. The electrochemical testing module includes a three-electrode electrolytic tank, test circuit and a motor stirring circuit. The polarization curve recognition module includes a 89C51 chip, an analog-digital conversionchip and a liquid crystal display circuit.

The invention relates to a process for chemically plating nickel on a magnesium alloy. The process comprises the following steps that step 1, the surface of a magnesium alloy part is polished, ground and degreased; then the magnesium alloy part is put into a chemical nickel plating solution with the temperature of 80-90 DEG C and the pH value of 5-6, the magnesium alloy part to be plated is taken as an anode, a stainless steel plate is taken as a cathode, and a saturated calomel electrode is taken as a reference electrode; a potential of-0.4 to-1.0 is applied and polarization is carried out for 30-120 s; step 2, external voltage is removed, the magnesium alloy part subjected to anodic polarization is directly subjected to chemical nickel plating in the chemical nickel plating solution, plating is conducted for 30-50 min, a compact and bright plating layer is obtained, and the thickness of the plating layer is 8-15 microns; and 3, the plated magnesium alloy part is taken out, washed with deionized water, rinsed and naturally air-dried. According to the process for chemically plating nickel on the magnesium alloy, zinc immersion or passivation treatment is not needed, the process is simplified, and the cost is reduced; and the magnesium alloy is suitable for large-scale mass production.

The invention provides a process for electrolyzing a high nickel-copper anode by adopting periodic reverse current, wherein the periodic reverse current can guarantee the maximum use efficiency of electrolytic copper, a cathode copper sheet is modified, impurities and an oxidation film on the surface of the copper sheet are reduced, a treatment agent contains oxalic acid components, nickel ions can be complexed through oxalic acid, the concentration of the nickel ions in a solution is reduced, the purity of the electrolyzed cathode copper is improved, and a circulated electrolyte is circularly purified, so that the waste of resources is reduced. A leveling agent can control the growth of crystal grains, so that the crystal grains are refined, and the surface of the produced cathode copper is smoother. Meanwhile, the reduction effect of copper ions can be effectively promoted, and the electrolysis progress is accelerated. A brightening agent can improve the brightness of a cathode copper electrode plate and effectively promote anode mud to fall off, the anode polarization phenomenon is avoided, the electrolysis speed is increased, and the production efficiency is improved.

The embodiment of the invention discloses a method for testing the electrochemical performance of a polar plate anode based on a novel material PPTC, and the method comprises the following steps: pretreatment: carrying out the ultrasonic cleaning of a PPTC polar plate anode sample through employing absolute ethyl alcohol, and then carrying out the blow-drying at room temperature, thereby obtaininga to-be-tested polar plate anode of a PPTC material; providing an electrochemical workstation, wherein the workstation adopts three electrodes and an electrolyte; connecting the anode of the polar plate to be detected to an electrochemical workstation; setting parameters of an electrochemical workstation; carrying out an electrochemical performance test on an electrode through an electrochemicalperformance characterization method, wherein the characterization method comprises one or more of electrochemical alternating-current impedance spectroscopy (EIS) analysis, anodic polarization curve analysis (LSV), Tafel curve analysis of overpotential analysis or Mott-schakus curve analysis of flat potential analysis; and evaluating the electrochemical performance. The method has the characteristics of simplicity in operation, high detection rate and the like.

The invention relates to corrosion electrochemical investigation, in particular to a method for evaluating protection capability, for structural metallic materials, of anti-corrosion materials by utilizing a wire beam electrode. According to the method, anti-corrosion paste or an anti-corrosion band is coated or pasted on the surface of the wire beam electrode; the wire beam electrode is soaked inelectrolyte solution to serve as a working electrode; a three-electrode system is adopted to carry out electrochemical detection; and the anti-corrosion capability of the anti-corrosion materials isevaluated through monitoring the current density increase condition under the condition of open circuit potential negative shift or anodic polarization. According to the method, the wire beam electrode is used for researching the corrosion condition under the anti-corrosion paste/band, so that the change condition of electrochemical parameters can be monitored intuitionally, the parts with local corrosion initiation can be correctly positioned under the protection state of the anti-corrosion paste/band so as to discover the weak points, and important reference is provided for the constructionforms and component optimization of the cladding materials.