31results about How to "Improve electrical corrosion resistance" patented technology

A terminal-equipped wire (10) is provided with the following: a wire (12) which is provided with a core wire (11) comprising metal of a greater ionization tendency than copper, the core wire (11) being exposed from an end; and a terminal (13) that comprises copper or copper alloy and is connected to the exposed core wire (11). Formed on the surface of the terminal (13) is a surface treatment layer (24) comprising a surface treatment agent (26) that forms a liquid or a paste and has a molecular structure including an affinity group having affinity to the terminal (13) and a hydrophobic group having hydrophobicity. Due to this configuration, the electrolytic corrosion resistance of the terminal-equipped wire (10) is improved.

The invention discloses a silver copper based metal oxide electrical contact material containing adding elements and a preparation method thereof. The electrical contact material is characterized by comprising the following components in percentage by weight: (20-50)% of silver metal oxide alloy, (0.3-9)% of electric conductive ceramics, (0.7-1.8)% of lanthanum nickel alloy, (0.7-4.9)% of adding elements, and the balance of silver copper alloy; and the contact material provided by the invention comprises the following simple substance elements in percentage by weight: (15-63)% of silver, (4-25)% of metal oxide, (0.3-9)% of electric conductive ceramics, (0.01-5)% of rear earth, (0.7-4.9)% of adding elements, and the balance of copper. The preparation method is characterized by comprising the following steps: smelting, pulverizing and milling (silver metal alloy power, and silver copper alloy powder) in proportion for optimization performances of the material, cladding electric conductive ceramic micro powder by silver, mixing powder of the adding elements in a certain mass ratio, pressing an ingot blank, sintering and extruding, rolling or drawing, thus obtaining the contact material. The electrical contact material provided by the invention has the advantages of low cost and excellent overall performance.

The invention discloses a preparation method of a photocatalysis film foaming body for electrocatalysis reaction. The preparation method includes: forming a photocatalysis film on the surface of a foaming body by means of dipping and lifting; degrading and decomposing organic matter in the film under voltage and current of an electrocatalysis device to form a stable film material. By degrading, easy-to-shed chemical bonds on the surface are eliminated, and few impurities are generated, so that impurity pollution caused in the process of electrocorrosion is lowered.

The present invention disclosed a spark plug that PT 公Ru IR alloy spark plugs and their preparation methods and applications. The spark plug electrode material includes: RU 1 to 20 %, IR 1 to 10 %, metal element A 0.05‑55555%, Rare earth element B 0.05‑1.5 %, the balance is PT and inevitable impurities. The metal element A is selected from one or more in one or more in the metal element A from RE, Al, W, NB, Th, Ti, ZR, CR.The present invention can reduce the amount of precious metals, reduce costs, enhance the combination of the crystal world in the alloy organization, improve the toughness and intensity of alloy materials, and improve the resistance of the alloy material's high temperature and ablation;The growth of such shaft crystals has improved the high temperature persistence and conductivity of the alloy.At the same time, the present invention adopts electrical pulse treatment and fast -cooled casting technology during the preparation process, reducing the analysis of components in the process of preparation alloy, reducing the resistivity, and improving the anti -electrical erosion capacity.

The invention discloses a composite material tool electrode for electrolytic deposition and electric spark and a preparation method of the composite material tool electrode, and belongs to the technical field of electrical discharge machining of electric spark. The composite material tool electrode for electrolytic deposition and electric spark is characterized by comprising, by weight, 16-18% of SiC particles, 14-16% of TiB2 particles, and the balance copper as a base body, and the SiC particles and the TiB2 particles are embedded in the base body. Due to the fact that the SiC particles and the TiB2 particles are added to the copper base body, compared with the method that only the SiC particles are added in the initial research stage, on the premise of not changing the total adding amount, the specific heat capacity of the tool electrode is improved by 10%, the coefficient of thermal expansion is lowered by 3%, the hardness is improved by 5%, and therefore the loss of the electrode under same electrical discharge machining parameters is lowered by 7%, and the roughness of a machined surface is lowered by 2%.

The invention belongs to the technical field of functional coatings, and specifically relates to a novel anti-fouling flashover coating for special and ultra-high voltage insulators. The mass percentages of the components are as follows: room temperature vulcanized silicone rubber 40%-50%; titanate coupling agent 5%-10% %; composite flame retardant 2‑6%; modified composite reinforcing agent 5‑12%; nano-TiO22‑4%; surfactant 0.5%‑1%; hexamethyldisilazane 1%‑5%; Defoamer 0.2%-0.5%; catalyst 0.3%-0.6%; cross-linking agent 0.3%-0.6%; the rest is solvent. Spray the prepared anti-fouling flashover coating on the surface of the cleaned ceramic insulator, and use it after natural curing for 96 hours at 25°C±2°C, 40%-70%RH. For the antifouling flashover coating, after the antifouling flashover coating is sprayed and cured completely, the contact angle is not less than 135°.

One kind of alloy that composed by Ag-Cu-C-RE has a good material electricity property. Add Cu and rare-earth element in Ag-C material to form one kind of Ag-Cu-C-RE alloy that synthesized by the method of mechanical composition. Its advantages: a good property; a lower cost by using Cu and RE; obvious technology advantage and marker competitive; and fit for the national policy of saving Ag; can yield good economic returns and social returns.

The invention relates to a high-conductivity abrasion-resistant coating for a guide rail and a preparation technology thereof. The coating comprises the following chemical components by content: 45 to 55% of Mo, 15 to 25% of Cu, 6 to 10% of Cr, 1 to 3% of B and 2 to 4% of Si, and the balance being Ni. The preparation technology comprises the steps like surface down cutting of the to-be-coated guide rail, surface cleaning of the guide rail, shield protection, sand-blasting roughening, coating preparation and coating grinding processing. The preparation technology is characterized in that a high-speed plasma spraying technology is adopted, a uniform and compact large-thickness, high-conductivity and abrasion-resistance coating can be prepared on the surface of an electromagnetic railgun launching guide rail, the thickness of the grinded coating is 1.0 to 1.1 mm, the bonding strength of the coating and the guide rail is 20 to 35 MPa, the microhardness of the coating is 450 to 600 HV, and the electric conductivity is 5 to 12% IACS. The obtained high-conductivity abrasion-resistant coating is mainly used in special parts like the electromagnetic railgun launching guide rail, the surface hardness, abrasion resistance and electrical erosion resistance of the guide rail can be effectively improved, the service life is prolonged, the thermal hardness of the surface of the guide rail is improved, the failure rate of grinding is decreased, and the coating has important engineering application value.

The invention discloses a preparation method of Cu-based SiC composite micropowder for electric spark tool electrodes, which belongs to the technical field of electric spark discharge machining, and includes a funnel, and is characterized in that the surface of SiC particle is chemically copper-plated and dried to obtain SiC copper-plated particle ;Pour the Cu melt into the funnel, and add the SiC copper-plated particles into the uniform feeder, and the SiC copper-plated particles enter the conduit evenly through the feeding tube, and are blown out of the conduit under the uniform wind force of the high-pressure nitrogen source, and the Cu melt is coated On the periphery of the SiC copper-plated particles and leaked from the nozzle together, they are atomized into composite fine powder by gas. This method uses nitrogen to blow SiC particles into Cu melt, which improves the uniformity of SiC particle distribution; at the same time, by increasing the feeding speed of SiC copper-plated particles, the content of SiC particles can be flexibly increased, which is beneficial to improve the anti-corrosion performance.

The invention discloses an anti-fouling flashover insulating coating added with micro-nano composite particles and a preparation process thereof. The weight percentage of each raw material is such as: fluorosilicone resin 36%-52%; micron-sized (10μm-200μm) composite particles: mainly fumed white carbon black 3%-5% CaCO3 0.5%-1.5%, CeO2 0.3%-1% and 0.5%-1.5% cerium fluoride composite particles and 2%-6% composite cross-linking agent for modification of micron-sized particles, 3%-8% composite reinforcing agent, nano-scale (25nm-75nm) composite particles: mainly There are nano-SiO2 0.3%-1%, nano-TiO2 2%-4%, nano-lanthanum oxide 0.2%-0.5%, and composite cross-linking agent for micron particle modification 2%-4%, surfactant 0.5% ‑1.5%, hexamethyldisilazane 3.5%‑7.5%, fluorosilicone resin defoamer 0.2%‑0.5%, catalyst 0.3%‑0.6%, composite titanate coupling agent 4%‑11%, composite Flame retardant 2%-6%, the rest is solvent. The preparation process of the anti-pollution flashover insulating coating in heavily polluted areas with the addition of micro-nano composite particles provided by the present invention adopts the method of segmented preparation and module combination, which can be industrialized and has excellent anti-pollution flashover performance, and can be widely used in heavily polluted areas. Power equipment for UHV transmission lines.

The invention relates to a hollow composite insulator used in 1100kV composite apparatus in power industry, and a producing method of the insulator. The insulator comprises an end connecting part, an insulation tube and an umbrella. The end connecting parts are stuck on the two ends of the winding tube. The invention is characterized in that: an integrated umbrella is stuck at the out side of an insulation tube; the insulation tube is a wound tube with an inner liner; the umbrella is an injecting-formed part made of high-temperature vulcanization silicon rubber, and because the inner liner of the insulation tube is an epoxy resin adhesive and SF6 decomposition mixing and solidifying structure, the anti-corrosion performance of the product is greatly increased; the umbrella is hot-solidified on the surface of the insulation tube at high vacuum and high temperature, so the connecting strength between the umbrella and the insulation tube is high, and the product performance is more stable and reliable. When winding the insulation tube, a track is first simulated on a computer, and then pins are fixed on both shaft ends of the mold core. When winding, a mechanism with even and constant tension force is used for control, thus realizing even paving of the glass fiber.