58results about How to "Effective corrosion" patented technology

The invention relates to a preparation method of a nanometer zirconia heat barrier coating which is mixed with rare-earth oxide and used for liquid-phase plasma spraying. The method comprises that precursor sol is used as a spraying raw material, atomized into fine liquid drops under atomized gas pressure, sent into plasma flame flow and sprayed and deposited on a matrix to obtain the nanometer zirconia heat barrier coating. The precursor sol is hydroxid precursor sol. According to weight proportion, the raw material includes 63 to 73 percent of ZrOCl2.8H2O and 27 to 37 percent of crystalline-state stabilizer oxide which is rare earth oxide. The invention can overcome the problems of poor sol distribution, poor sol flowing performance, chlorid ion erosion, poor sol granule atomizing effect, uneven granule sizes, and the like in the the traditional liquid-phase plasma spraying process. In the invention, a composite coating is prepared, and has the advantages of high depositing efficiency, low cost, wide spraying material, strong adaptability of the liquid-phase precursor, low heat conductivity, good heat and shock resistance, and the like.

A corrosion-inhibiting composition for application to a metal substrate, such as aluminum or steel, and in connection with a paint, and the synthesis of the composition. The active inhibitor constituent of the composition can be selected from the group consisting of 2,5-dimercapto-1,3,4 thiadiazole (DMTD), 2,4-dimercapto-s-triazolo-[4,3-b]-1,3-4-thiadiazole, trithiocyanuric acid (TMT), and derivatives of DMTD and TMT, including various N— or S— and N, N—, S— and N—,S-substituted derivatives of DMTD, including salts of DMTD of the general formula: M(DMTD)_n, where n=1,2 or 3, and M is a metal cation and preferably M=Zn(II), Bi(III), Co(II), Ni(II), Cd(II), Pb(II), Ag(I), Sb(III), Cu(II), Li(I), Ca(II), Sr(II), Mg(II), La(III), Ce(III), Pr(III), Al(III) or Zr(IV). DMTD, TMT, and their derivatives may also be combined with phosphates, molybdates, borates, silicates, tungstates, phosphotungstates, phosphomolybdates, cyanamides, carbonates, SiO₂ and mixtures thereof.

The invention discloses a rotary kiln flue gas treating device capable of automatically controlling the blowing rate of a draught fan, which relates to flue gas treating equipment for a rotary kiln used in titanium dioxide production. A main structure is that: a primary cyclone dust collector is connected with the rotary kiln and a secondary cyclone dust collector; the secondary cyclone dust collector is connected with a Venturi dust collector; the Venturi duct collector is connected with an acid mist washing tower; the acid mist washing tower is connected with a chimney through an exhaust pipe; an induced draught fan is arranged on the exhaust pipe and provided with a frequency converter; a sprayer and a washing sprayer on the Venturi dust collector and the acid mist washing tower are connected with water supply pipes respectively; the water supply pipes are connected with a water supply pump of a cooling and settling pond; water ponds at the bottoms of the Venturi dust collector and the acid mist washing tower are connected with water return pipes; and the water return pipes are connected with the cooling and settling pond. The rotary kiln flue gas treating device capable of automatically controlling the blowing rate of the draught fan captures and cools about 600 DEG C high temperature flue gas and fine dust which are generated in a metatitanic acid calcining process by the rotary kiln, and finally realizes the clean emission standard of tail gas and the recycling of captured dry ash.

The invention relates to an EVM rubber composition used as a fuel hose coating. The composition comprises the following components in parts by weight: 100 parts of EVA, 50 to 60 parts of reinforcer N330, 5 to 10 parts of plasticizer DOS, 2 parts of anti-aging agent RD, 2 to 3 parts of anti-hydrolysis agent P50, 0.5 parts of processing aid stearic acid, 2 parts of processing aid polyethylene wax, 2 to 3 parts of vulcanizing aid DCP, and 1 to 3 parts of vulcanizing aid TAC. Since EVM (ethylene vinyl-acetate copolymer) is used as the major material, on the one hand, the EVM rubber composition as the fuel hose coating is resistant to fuel corrosion and more favorable for safety transportation of fuels, and on the other hand, the cost is lower than that of AEM and about a half that of AEM provided by the DuPont company, so that the cost is saved.

The invention relates to a novel brushless motor fuel pump. In the technical scheme, a brushless motor controller is connected outside the fuel pump, namely one end of an electronic plug-in part is connected with a fuel pump motor stator, and the other end of the electronic plug-in part is connected with the brushless motor controller; a vehicle-mounted power supply is connected outside and an integrated circuit is connected inside a voltage-stabilizing and filtering circuit in the brushless motor controller; the integrated circuit is respectively connected with a peripheral resistance-capacitance circuit and a three-phase bridge inverter; and a starting circuit and three-phase feedback voltage in the integrated circuit are connected with a phase locked logic phase change circuit respectively. The defects that a position sensor has low sealing property, ages quickly, is corroded, and the like are overcome. By a counter potential reversing technology, the pump can effectively resist fuel corrosion and fuel electric conduction, can be suitable for various liquid fuels such as gasoline, methanol, ethanol and the like, has high reliability, small volume, long service life and low price, is convenient to install, reduces a motor gap, and improves motor output and motor efficiency, and the volume of a pump body is reduced.

The invention discloses a high-tearing strength, biodiesel-resistant hydrogenated acrylonitrile butadiene rubber composition for automobile hoses, which is prepared from the following components in parts by weight: 100 parts of hydrogenated acrylonitrile butadiene rubber, 15 to 25 parts of highly clean carbon black, 90 to 120 parts of thermal decomposition process carbon black, 5 to 10 parts of filler, 20 to 30 parts of plasticizer, 5 to 8 parts of zinc oxide, 0.5 to 1.5 parts of stearic acid, 1 to 3 parts of anti-aging agent, 0.1 to 0.5 part of sulfur, 6 to 10 parts of vulcanizing agent and 3to 5 parts of accelerant. Since the rubber composition disclosed by the invention adopts hydrogenated acrylonitrile butadiene as a main material, on one hand, biodiesel corrosion can be effectively resisted, which is more favorable for the protection of safe fuel transportation, and on the other hand, the operating requirements of a high temperature-resistant, low-permeability fuel system can bemet.

The invention discloses a method for detecting distribution and the content of residual austenite in low alloy structure steel. Water is used as cooling liquid, metallographic waterproof abrasive paper is used for rough grinding and fine grinding of a test surface of a sample, the sample subjected to fine grinding is polished, sodium metabisulfite, picric acid, sodium hydroxide, distilled water, hydrochloric acid and absolute ethyl alcohol are mixed, stirred and heated to prepare a corrosion reagent, the polished sample is subjected to electrolytic polishing treatment, the sample subjected toelectrolytic polishing treatment is placed into prepared corrosion solvents to remove interference phases, and distribution and the content of the residual austenite of the sample are detected by metallographic observation and representation. The method is simple in operation and short in polishing corrosion time. After the low alloy structure steel is corroded, a residual austenite structure in the low alloy structure steel can be clearly displayed. Characteristic parameters such as the content, the size, the shape and distribution of the residual austenite can be rapidly, accurately and quantitatively analyzed by metallographic software.

The invention relates to a large-scale cultivation method of pumpkin seedlings. The method includes the steps of firstly, preprocessing seeds; secondly, processing before sowing; thirdly, performing spaced sowing, and performing daily weeding and pest control. Experiments show that the method can effectively avoid diseased and weak seedlings, the cultured seedlings can be sold, and the method is of great significance to the large-scale cultivation of the pumpkin seedlings.

In order to provide a water-treating compositon which has a superior stability during storage or the use and simultaneously prevents the corrosion, the scale formation and the growth of microorganism in a colling water, the present invention provides a multifunctional water-treating composition comprising at least one component selected from a group consisting of a mixture including azole compound and carboxylate, orthophosphate salt and zinc salt; a microorganism growth inhibitor; a scale formation inhibitor; an organic phosphonate; and nitrate.

The invention discloses a method of preventing hydrogen fluoride corrosion in aluminum electrolysis industry and belongs to the field of glass corrosion prevention. The method includes the sequentialsteps of alkali washing of glass, cleaning, surface activation, coating, and drying. The method allows a coating and glass to be combined better; mechanical properties of the glass coating can be improved; whole mechanical and chemical properties and light transmittance of glass are not lowered. In addition, the method helps effectively prevent hydrogen fluoride corrosion and improve tolerance ofglass to acids and bases, attraction of dust to glass surface is greatly reduced, and light transmittance of the glass is greatly improved. The method allows coating precision to be improved on the whole, adaptability of machine batch treatment is improved, and it is guaranteed that anticorrosion performance of glass meets the standard at the premise of improved efficiency; as the whole coating step is applicable to automation on equipment, the method has better control convenience than the prior art.

The invention relates to an engineering plastic formula, wherein the engineering plastic is prepared from the following raw materials by weight: 50-60 parts of a synthetic resin, 30-40 parts of an epoxy resin, 20-30 parts of a filler, 5-10 parts of a plasticizer, 2-5 parts of a lubricant, 5-10 parts of a curing agent, and 5-10 parts of reinforcing fiber. According to the present invention, the main component of the plastic formula is polyethylene; and the plastic produced according to the formula has advantages of no toxicity, strong chemical stability, high-temperature resistance and no environment pollution, can effectively resist acid corrosion and alkali corrosion, and is the environment-friendly plastic.

The invention relates to a low-temperature-resistant plastic formula, wherein the low-temperature-resistant plastic is prepared from the following raw materials by weight: 50-60 parts of a synthetic resin, 40-50 parts of polyvinyl chloride, 20-30 parts of a filler, 5-10 parts of a plasticizer, 2-5 parts of a cross-linking agent, 5-10 parts of a curing agent, and 2-5 parts of a reinforcing agent. According to the present invention, the main component of the plastic formula is polyethylene; and the plastic produced according to the formula has advantages of no toxicity, strong chemical stability, low-temperature resistance and no environment pollution, can effectively resist acid corrosion and alkali corrosion, and is the environment-friendly plastic.

The invention belongs to the technical field of ultrafiltration membrane cleaning, and discloses an ultrafiltration membrane cleaning system and method. The system comprises a raw water tank, an ultrafiltration water inlet pump, a self-cleaning filter, ultrafiltration equipment, a water producing tank, a tail gas destroying device, a backwashing water pump, an air compressor subsystem, an ozone generator subsystem and an optional dosing cleaning subsystem. By using the novel ultrafiltration membrane system in cooperation with the ozone pre-oxidation method, the service life of the ultrafiltration membrane can be prolonged, the cleaning effect is improved, and the influence on the online rate of membrane operation is reduced.

The invention discloses a high-elastic wear-resistant antibacterial regenerated polyester core-spun yarn and a production process thereof, and particularly relates to the technical field of polyestercore-spun yarns. The core-spun yarn comprises a polyester core-spun yarn A and a polyester core-spun yarn B. The polyester core-spun yarn A comprises boron fibers, carbon fibers and basalt fibers; andthe polyester core-spun yarns B take polyimide filaments as core yarns and take polyester staple fibers as covering yarns. The boron fibers, the carbon fibers and the basalt fibers are used in cooperation, so that the heat resistance and the flame retardance of the polyester core-spun yarn can be effectively enhanced, heat insulation and flame retardance treatment can be effectively conducted atthe sewing position of a garment fabric, and the safety performance is improved. A carbon fiber yarn made of the polyester core-spun yarn A material and polyester staple fibers in the polyester core-spun yarn B are matched to be used as covered yarns, and a composite bulked yarn made of the polyester core-spun yarn A material and polyimide filaments in the polyester core-spun yarn B are matched tobe used as core yarns, so that the heat-resistant strength and the flame retardant property of the polyester core-spun yarn can be further improved, and the safety performance is improved.