33results about How to "Retain corrosion resistance" patented technology

The invention discloses a modified polytetrafluoroethylene turning large plate which is characterized in that by comprising the components as follows: 10 to 15 percent of crystal whiskers, 10 to 15 percent of graphite and the rest percent of polytetrafluoroethylene. The invention simultaneously discloses a processing method of the large plate, which comprises the steps of crystal whisker surface modification treatment, material mixing, pressing, sintering, rotary cutting, post-treatment of the product, and the like. The large plate disclosed by the invention has not only the advantages of weather resistance, corrosion resistance, and the like of a polytetrafluoroethylene material, but also high creep resistance and wear resistance, so as to enhance the mechanical strength of the large plate. Therefore, the application range of the large plate in the field of chemical equipment such as liquid delivery pipes, gas exhaust pipes, steam pipes, and high pressure oil pipes of rolling mills is widened, and the service life of the large plate is prolonged.

The invention relates to a ternary polymerization polytetrafluoroethylene resin which is formed by copolymerizing tetrafluoroethylene, fluorine-containing olefin and perfluor (alkyl vinyl ether) and also relates to a preparation method and concentrated dispersion liquid of the ternary polymerization polytetrafluoroethylene resin. On the basis that the original characteristics of the polytetrafluoroethylene resin are kept, the provided ternary polymerization polytetrafluoroethylene resin can be processed to form products with various specifications and shapes through melting, so that the application range of the polytetrafluoroethylene resin is widened; the provided concentrated dispersion liquid of the polytetrafluoroethylene can fully cover the surface of a base material during film coating, and the light-transmitting performance and the glossiness of the coated film are improved; and by the provided preparation method, the production cost is reduced, environment pollution is reduced, the reaction conditions are mild, and high safety can be achieved.

The invention belongs to the technical field of preparation of powder coatings and particularly discloses a polyphenylene sulfide powder coating having both anti-corrosion and fire-proof functions. The coating is prepared from 15%-55% of polyphenylene sulfide, 0-10% of titanium dioxide, 0-5% of mica powder, 0-3% of barium sulfate, 0.5%-1.5% of a silane coupling agent, 2.5%-5% of expandable graphite powder, 6%-10% of microcapsule modified ammonium polyphosphate, 6%-10% of microcapsule melamine, 6%-10% of microcapsule pentaerythritol, 0.5%-1.5% of a dispersing agent, 0.5%-1.5% of a leveling agent and 3%-7.5% of fatty alcohol polyoxyethylene methyl terminated polyether. The polyphenylene sulfide powder coating is applicable to fire-proof and anti-corrosion protection of steel structure buildings, large chemical reaction kettles, chemical corrosive raw material delivery pipelines and valves and has excellent anti-corrosion performance and good fire-proof performance.

The invention belongs to the technical field of rubber materials and preparation of the rubber materials, and particularly relates to a blending type rubber compound and a preparation method thereof. The rubber compound comprises, by weight, 75-85 parts of ethylene-propylene-diene monomer (EPDM), 15-25 parts of rubber type chlorinated polyethylene (CPE), 2-3 parts of dicumyl peroxide (DCP), 0.8-1.5 parts of triallyl isocyanurate (TAIC), 25-35 parts of talcum powder, 25-35 parts of N660, 4-6 parts of TP759, 1-1.5 parts of SA and 3-6 parts of ZnO. The rubber type CPE and the EPDM are mixed in a certain proportion and other assistants are added simultaneously to obtain the blending type rubber compound through corresponding preparation processes, so that chlorine elements are added on the molecular weight of the EPDM, and the modified ethylene propylene rubber (EPR) not only reserves corrosion resistance of the EPR, but also is provided with good physical and mechanical properties and processability. The problems of the poor oil resistance and high cost of the existing EPR can be solved.

The invention provides a polyether-ether-ketone cable material. The polyether-ether-ketone cable material is characterized in that a raw material formula comprises the following materials in parts by weight: 50-70 parts of polyether-ether-ketone, 1-5 parts of a lubricating agent, 0.1-1 part of a nucleating agent, 3-8 parts of a compatilizer and 25-40 parts of a hardness conditioning agent. A preparation method of the polyether-ether-ketone cable material is characterized by comprising the following steps of weighting the materials according to the mass part of the materials in the raw material formula, mixing and stirring all the materials for 15-30 minutes in a high-speed mixing machine, then discharging, pelleting through a double-screw extruder at the process temperature of 220-380 DEG C, and packaging. The polyether-ether-ketone cable material provided by the invention has the advantages that the machining property of the polyether-ether-ketone product is improved, the extrusion molding is facilitated, the hardness of the material is reduced, the polyether-ether-ketone is suitable for being applied to cable industries, the excellent property of polyether-ether-ketone material can also be retained, and the polyether-ether-ketone cable material is flame-retardant, resists high temperature, low temperature, corrosion, oil and abrasion and can be widely applied to automobile cables, locomotive cables, nuclear power and the like with strict operating requirements.

The antiwear stainless cored high chromium wire has coat of low carbon steel and powder core comprising high carbon ferrochromium 36-42 wt%, micro carbon ferrochromium 26-32 wt%, metal Cr powder 15-17 wt%, ferromolybdenum 2-4 wt%, ferrovanadium 3-5 wt%, tungsten carbide 4-6 wt%, ferroboron 5-8 wt%, nickel powder 2-4 wt%, niobium powder 2-5 wt% and RE silicon 2-3 wt%, and with one welding wire filling amount of 0.49-0.52. The present invention results in raised comprehensive welding performance and raised welding quality, high anticossive performance, high anticracking performance and average fused-on metal hardness of HRC54, and may be applied widely in build-up welding field requiring high antiwear, anticorrosive and anticracking performance.

The invention discloses a preparation method of a copper-steel composite material with an authigenic copper-rich layer on a steel surface. The problem about the bonding between the interfaces of a former externally added coating layer and a matrix is solved by means of spontaneously generating a copper-rich coating layer on the surface of a steel matrix. The preparation method comprises the following steps: corroding the surface of copper-containing steel, removing corrosion products, and treating the surface of the copper-steel composite material. According to the method, the copper-steel composite material with the copper-rich outer layer can be obtained without the means of externally adding a coating layer; as the coating layer is spontaneously generated by the matrix, the prepared copper-steel composite material does not have the problem about the bonding between the composite interfaces and the coating layer does not usually peel off; the prepared copper-steel composite material keeps not only the excellent properties such as high strength and good toughness of steel, but also the characteristics such as corrosion resistance and conductivity of copper; besides, the appearance of the composite material is attractive.

The invention discloses a butt welding process method of a titanium-iron-stainless steel three-layer composite plate, which belongs to the field of layered dissimilar metal composite plate welding. The method first processes the base material of the titanium-iron-stainless steel three-layer composite plate to prepare the base material with a welding groove; prepares the weld filler metal according to the welding groove form of the welded joint; prepares the base material with the welding groove The material is placed in the welding fixture, the titanium cladding is subjected to the first pass of bottom welding, and then the weld filler metal is placed, and the second pass of upper metal welding is performed to obtain the butt joint of the titanium-iron-stainless steel three-layer composite plate . This method is especially suitable for composite thin plates. At the same time, it solves the problem of brittle intermetallic compounds when welding titanium-iron dissimilar metals, and also retains its original corrosion resistance when welding iron-stainless steel dissimilar steels. The produced by this method The yield is high, the production cost is low, the welding efficiency is high, the strength of the welded joint is high, and the tensile strength of the welded joint reaches more than 75% of the tensile strength of the base metal.