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 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 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°.

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.