391results about How to "Free from corrosion" patented technology

A lamp for a light string has a mechanical shunt to allow current to pass to the next light in the event of a missing bulb. A resilient shunt is held in a generally lateral orientation by a shunt holder within the socket. When the hollow base with its bottom opening is inserted into the socket, the walls of the base cam the ends of the shunt away from the electrical contacts on the walls of the socket. Likewise, when the base is removed, the resilient lateral ends of the shunt return to engage the electrical contacts. The timing of the contact by the shunt with the electrical contacts avoids arcing. Additionally, slits formed in the wall of the base allows the Dumet wires to exit the sides of the base in the correct location for engaging the electrical contacts, thus reducing the instances of misaligned Dumet wires.

The invention relates to an automobile antifreeze which comprises the following components by weight percent: 90-96% of alcohols, 1%-5% of water, 0%-0.5% of pigments and 3%-7% of additives. Compared with the prior art, the automobile antifreeze has strong corrosion resistance and can effectively prevent the scale formation, and the automobile antifreeze further has excellent protection performance for any material of a cooling part of an engine and excellent performances of anti-freezing in winter, anti-boiling in summer, anti-scale and anti-corrosion all over the year and the like and can effectively protect a water cooling system of an automobile, prolong the service life of the water cooling system of the automobile, reduce the cost, simultaneously have the environmental protection advantage and achieve the requirements of British standard BS6580:1992.

A fluid control system with easy installation in a semiconductor production system etc. and pipe and wiring connections, with reduced pressure loss due to pipe connections, with easy change of arrangement of modules, free from corrosion even using a corrosive fluid for the fluid, and enabling control of the flow rate even with pulsation of the inflowing fluid is provided. The fluid control system of the present invention is characterized by having a flowmeter sensor part having an ultrasonic oscillator generating an ultrasonic wave in a fluid and an ultrasonic oscillator receiving the ultrasonic wave generated from the ultrasonic oscillator and outputting a signal to a flowmeter amplifier and a control valve controlling the state of flow of fluid to a predetermined state by a working pressure, wherein the flowmeter sensor part and the control valve are arranged inside a casing having a fluid inlet and a fluid outlet.

The invention belongs to the technical field of a nanomaterial, and specifically relates to an iron-nitrogen-doped graphene porous material with dual-site catalytic oxygen reduction activity, and a preparation method and an application therefor. The porous material is formed by embedding graphite-carbon-coated iron carbide into a nitrogen-doped porous graphene band network structure; the preparation method for the iron-nitrogen-doped graphene porous material comprises the steps of preparing a graphene oxide solution; adding a proper amount of conductive macromolecular pyrrole to the graphene oxide solution; obtaining uniform hydrogel through a hydrothermal process; performing oxidative polymerization on the hydrogel by ferric iron; then dispersing the hydrogel into a fresh ferric iron solution to complete adsorption; then performing drying and high-temperature carbonization thermal processing; and finally removing non-active and free iron phase from the reaction system by dilute acid so as to obtain the iron-nitrogen-doped graphene porous material. The porous material can be used as the negative electrode catalyst for a fuel cell, and shows quite high catalytic oxygen reduction activity, so that the porous material has quite important research meaning and bright application prospects.

The invention relates to a high-power offshore wind generating set tower bottom cooling system and a control method. The cooling system comprises a water cooling circulation system and an air cooling circulation system. A heat exchanger of the water cooling circulation system is located outside a tower. The other parts of the water cooling circulation system are all sealed inside the tower. The interior of the tower is divided into three layers from top to bottom through two platform partition plates. Two water cooling energy consumption assemblies are located on the bottom layer and the highest layer respectively. Two air cooling power consumption devices are located on the platform partition plate of the middle layer. Fans below two heat exchangers inside the tower drive air inside the tower to form a circulating wind path between venting pipes and the two air cooling power consumption devices. Cool-heat exchange is conducted between cooling liquid in the heat exchangers inside the tower and the heat exchanger outside the tower, and intra-tower wind path circulation and water path circulation are coupled through the heat exchangers inside the tower. By the adoption of the integrated closed type circulation cooling system, devices inside the tower are prevented from being corroded in a salt-spray environment, a plurality of liquid cooling assemblies at the bottom of the tower are cooled simultaneously, and the air at the bottom of the tower is cooled through the heat exchangers inside the tower in cooperation with the intra-tower air circulation. The cooling system is suitable for simultaneous energy saving in the special offshore environment.

The invention provides a submersible buoy pulley mooring system and relates to a mooring system. The submersible buoy pulley mooring system mainly comprises submersible buoys, pulleys, anchor bases, ropes and rope knots. The anchor bases are provided with rope chains in a tying mode. The other end of each rope chain is tied to each fixed pulley support. Each pulley is wound with a rope. One end of each rope is tied to the corresponding submersible buoy. The other end of each rope is tied to a floating body required to be moored. The positions, between the pulleys and the moored floating body and close to the pulleys, of the ropes are provided with the rope knots in a tying mode. Combination of a plurality of submersible buoy pulley anchoring units distributed on the periphery tightly pull the central floating body required to be moored jointly. By means of the submersible buoy pulley mooring system, the problems of anchor chain breakage or anchor base slippage and the like generated due to the fact that the mooring constraining force is violently increased can be avoided, so that the storm resistance capacity can be provided, and the mooring cost is lowered.

An environment-friendly high-density solid-free weighting agent comprises components in parts by weight as follows: 0.02-0.05 parts of a dispersant, 0.3-1 part of a tackifier, 0.5-1.2 parts of chelating agent, 0.6-2 parts of a corrosion inhibitor and the balance of soluble weighting materials, wherein the dispersant is one or two of sodium polyacrylate and copolymer of phosphono and carboxylic acid; the tackifier is one or more of chitosan, agar, polyacrylamide, xanthan gum and hydroxypropyl methyl cellulose; the chelating agent is one or two of aminophosphonic acid chelate resin and ethylenediamine tetraacetic acid disodium; the corrosion inhibitor is one or two of multiple polycarboxylate and sodium gluconate; the soluble weighting materials are one or more of potassium formate, potassium citrate, potassium acetate, potassium silicate and potassium sulfate. The process steps are as follows: the raw materials are taken in weight proportion, mixed and uniformly stirred; the raw materials are added to water and dissolved at the high temperature of 70-80 DEG C; a product is evaporated to dryness, and solid is obtained; the obtained solid is ground into powder, and the solid weighting agent is obtained.

The invention relates to a preparation method for ionic liquid, especially to a one-step method for synthesis of a quaternary ammonium or quaternary phosphonium compound. According to the method, a nitrogen compound or phosphorus-containing compound, a proton compound and carbonic ester are added into a reactor together for a one-step reaction so as to synthesize corresponding quaternary ammonium or quaternary phosphonium ionic liquid, wherein the reaction is a one-pot reaction involving three reactants. The invention also provides a lithium ion secondary battery of the ionic liquid prepared by using the preparation method. The preparation method for the ionic liquid can broaden the selection scope of preparation raw materials for the ionic liquid, so the varieties of synthesized ionic liquid are enriched; and the preparation method utilizes nontoxic and harmless raw materials, has mild reaction conditions, low requirements on production equipment and low production cost, and meets demands of green industry and large-scale industrial production.

The invention provides a screw rotor cooling device of a screw vacuum pump, belonging to the technical field of pumps and solving the problems that an existing screw rotor cooling device of the screw vacuum pump is poor in cooling effect and inconvenient to machine. The screw rotor cooling device comprises a hydraulic pump and a cooling liquid tank; a helical tooth is arranged on a screw rotor, a cooling liquid channel is formed in the helical tooth along the helical direction, an opening opened relative to the outside is formed in the upper surface of the cooling liquid channel, and an insert matched with the shape of the opening is fixed at the opening of the cooling liquid channel; the helical tooth is externally coated by an engineering plastic attaching layer, and the engineering plastic attaching layer covers the joint of the insert and the opening; a liquid inlet end of the cooling liquid channel is communicated with the cooling liquid tank through the hydraulic pump, and a liquid outlet end of the cooling liquid channel is communicated with the cooling liquid tank. According to the screw rotor cooling device of the screw vacuum pump, the cooling liquid channel is formed in the helical tooth of the screw rotor, so that the cooling effect of the screw rotor is relatively good.

The invention discloses an anti-oxidation metal surface treatment agent. The anti-oxidation metal surface treatment agent consists of the following raw materials in parts by weight: 13-20 parts of polyvinyl alcohol, 0.4-1 part of tea saponin, 0.8-1 part of sodium citrate, 0.2-0.3 part of lauryl mercaptan, 0.1-0.3 part of 2-thiol group benzimidazole, 0.1-0.2 part of antioxidant BHT, 0.4-1 part of calcium lignosulphonate, 2-3 parts of amino tri(methylene phosphonic acid), 6-8 parts of sericin, 0.08-0.1 part of boric acid, 10-20 parts of methyl benzotriazole, and 180-200 parts of de-ionized water. The water soluble high-molecular polyvinyl alcohol is mixed with the sericin and is modified by the boric acid to improve the tensile strength and the heat stability of a blended membrane; corrosion inhibition alkali liquid using the methyl benzotriazole as a main material is added, so that the film attached on the metal surface is more uniform and stable to protect a metal material from being corroded by harmful media in atmosphere and water so as to achieve a better corrosion inhibition effect; and the added 2-thiol group benzimidazole and antioxidant BHT can improve the oxidation resistance of the metal surface treatment agent.

The invention provides a liquid crystal display panel. The liquid crystal display panel comprises a colored film substrate, an array substrate and a redundant isolation part, wherein the array substrate and the colored film substrate are arranged oppositely; the array substrate comprises a frame adhesive coating region; the frame adhesive coating region is provided with a first metal cable, an insulating layer located above the first metal cable and a second metal cable located above the insulating layer; a through hole is formed in the insulating layer in the frame adhesive coating region; the second metal cable is connected with the first metal cable through the through hole; the redundant isolation part is formed on the frame adhesive coating region and correspondingly covers the through hole. The liquid crystal display panel provided by the invention has the beneficial effects that the an isolation layer is arranged between the surface of the frame adhesive coating region and the through hole so as to protect the through hole from being corroded by water vapor.

The invention provides waterborne polyurethane three-protection paint for circuit board anticorrosion. The waterborne polyurethane three-protection paint for the circuit board anticorrosion comprisesthe following preparing raw materials in parts by weight: 20-60 parts of waterborne polyurethane resin, 40-80 parts of deionized water, 0.1-15 parts of a drying auxiliary agent, 0.1-10 parts of a stabilizing agent, 0.1-10 parts of an auxiliary leveling agent, 0.1-10 parts of a defoaming agent, 0.3-5 parts of a sterilizing agent, 0.3-4 parts of a flatting agent, 0.3-2 parts of a fluorescent agent,0.3-2 parts of an anti-yellowing agent and 0.1-3 parts of other auxiliary agents.

The invention relates to a dual-function oxide anode of integral regenerate fuel battery and relative production, wherein it comprises polymer electrolyte film, dual-function catalysis layer and disperse layer; said disperse layer is multifunctional disperse layer, whose substrate is carbon material or metal, with catalysis flat layer above; the flat layer uses corrosion-resistant material as carrier; said carrier has oxygen-analysis catalyst with high electric catalysis activity, and it is mixed with hydrophobic substance and/or porous agent on the substrate. The invention uses the catalyst of flat layer to improve electrolysis function, to avoid electrode corrosion, and adjusts the ration of hydrophilism catalyst, hydrophobic substance, and porous agent, to improve service life of battery.

The invention discloses a production process for preparing high-purity quartz powder from quartzite. The production process comprises the following steps: 1) soaking; 2) smashing; 3) calcining; 4) water quenching; 5) grinding; 6) magnetic separation; 7) elestrostatic separation; 8) acid pickling; 9) cleaning by deionized water; 10) drying. According to the production process, the contamination particles are eluted via gradient acidity distribution; before the smashing, strong acid is used for soaking so as to remove the impurities on the surface of the quartzite; during the water quenching, medium/strong acid is used for removing the metal impurities wrapped in the quartzite; during the grinding, in order to protect the equipment from erosion, medium/weak acid is used for removing the impurities during the grinding, and a ball grinding mill is utilized to increase the contact probability and contact area between the acid liquor and the impurities so as to increase the impurity removal efficiency; during the final acid pickling, weak acid is used for further removing a small quantity of residual contamination particles which are not reacted completely; the afterheat generated during the calcination is collected and used for the final drying, so that the energy consumption is reduced and the production cost of the enterprise is decreased.

A single phase alkaline composition comprising by weight about 10 to about 25 percent of nonionic surfactant blend comprising a ratio of between about 1:1 to about 1:2 of alcohol ethoxylate:fatty alcohol alkoxylate, about 3-10% of at least one water soluble solvent, about 1-10% of a chelant, 2-12% of an alkalinity source, 0.5-2% of an anionic surfactant blend comprised of at least about 40-70% of a sulfosuccinate, the balance being water. Compositions of the invention are useful for re-moving hydrophobic soils or oils whether they are located on a hard surface or on a linen. A method of cleaning a hard surface is also disclosed comprising the steps of diluting the composition of the invention with water to about 1 to about 3 weight percent, applying the diluted composition to the surface, and wiping the surface, wherein the surface is substantially free of oil or residue and the surface is substantially free of corrosion.

The invention provides a lithium metal battery electrolyte. The lithium metal battery electrolyte is composed of lithium salt, additives and non-aqueous solvent, wherein the additives are one or moreselected from NaBOB, NaTFSI, NaFSI, NaPF6, NaBF4, (C3H3NaO2)n, Na2SO4, Mg(FSI)2, Mg(TFSI)2, KFSI and KTFSI, and the concentration of the additives of the lithium metal battery electrolyte is 0.2-0.5 mol/L; the non-aqueous solvent is one or more selected from carbonate organic solvent, phosphate organic solvent and ether organic solvent. The lithium metal battery electrolyte can form an SEI (solidelectrolyte interface) layer on the surface of a metal lithium negative electrode during a constant current charging and discharging process to improve the safety performance, the utilization rate andthe cycling stability of a lithium metal battery. The invention also provides the lithium metal battery.

The present invention relates to a submarine photoelectric composite cable non-universal type optical unit and its manufacture method. Its structure includes the following several portions: several optical fibres, plastic tube, stainless steel tube, water-proof material, high-strength armouring steel wire and external protective layer. Said invention also provides the concrete steps of its manufacture method.

A method of forming a flexible elastomer polymer fluid jacket for a plastic processing mold, and a novel elastomer polymer fluid jacket. The method comprises attaching channel formers to the rear surface of the metal shells of the mold sections to define a desired flow configuration, securing a support casting to the rear surface of the metal shells spaced from the channel formers to define a designed cavity, feeding a curable elastomer polymer typified by silicone elastomers into the cavity, curing the elastomer polymer, and removing the channel formers whereby the cured elastomer polymer forms a fluid jacket. A mold having mold components with flexible polymer fluid jackets between the mold shells, preferably nickel shells, and support castings permit enhanced heat transfer to the mold cavity while providing improved thermal insulation to the mold. The elastomer polymer also enables multiple modular configurations of the heating and/or cooling function of the mold.

The invention discloses a wear-resistant and anticorrosive polyethersulfone coating, and a preparation method and an application thereof, and belongs to the technical field of coatings. The purpose of the invention is to solve the disadvantages of needing of cooperative use of multilayer coatings, tedious spraying process, unable consideration to the anticorrosion performance and the wear resistance, and obvious reduction of the anticorrosion and the wear resistance performances at a high temperature of present anticorrosive and wear-resistant coatings. The wear-resistant and anticorrosive polyethersulfone coating is prepared from polyethersulfone resin, polytetrafluoroethylene resin micro-powder, silicon carbide micro-powder and a composite solvent, and synergism of above components makes a coating layer obtained by using the coating has no change and maintains adhesion after being immersed in 10% sulfuric acid or 10% sodium hydroxide or toluene for 120h; and the friction coefficient and the wear rate of the coating layer are extremely low, so metal corrosion is effectively avoided, and difficult wearing failure of the coating layer is realized.

The invention relates to a special phosphorus burning tower, which includes a steam drum, an annular membrane water wall assembly, a phosphorus burner and a water vapor circulating pipeline. The upper end and the lower end of the annular membrane water wall assembly are respectively provided with an upper header subassembly and a lower header subassembly. The upper header subassembly comprises an annular upper header and a conical upper head, the top or side wall of which is provided with a process gas outlet pipe. The lower header subassembly includes an annular lower header and a lower head. The thermal-process phosphoric acid production heat-electricity self-balancing system includes the special phosphorus burning tower, a hydration system and an extraction condensing type steam turbine generator unit. The special phosphorus burning tower provided in the invention ensures that the strength requirement can be satisfied under the conditions of enhanced steam pressure and temperature and the temperature of a reaction tower inner wall surface is controlled at an allowable temperature at the same time, so that corrosion by high temperature process gas can be avoided, and the special phosphorus burning tower can be ensured to generate a medium-pressure steam by-product and can operate safely and reliably for a long term. Meanwhile, the medium-pressure steam by-product of the special phosphorus burning tower is introduced into the extraction condensing type steam turbine generator unit, thus realizing maximum energy utilization.