50results about How to "High temperature corrosion resistance" patented technology

The invention relates to the technical field of a coating, and particularly relates to a high-temperature nano ceramic coating with high emissivity. The high-temperature nano ceramic coating with high emissivity is prepared from 20-27wt% of binder, 40-51% of wt% of filler, 21-39% of water and 0.5-1.5wt% of assistant, wherein the binder is one or two of a styrene-acrylic emulsion and ludox; the filler comprises calcined kaolin, a niobium oxide, a rare-earth oxide and an inorganic black pigment; the assistant comprises a dispersant and a defoamer. The high-temperature nano ceramic coating with high emissivity has high temperature resistance, fouling and slagging resistance, high-temperature corrosion resistance and wear resistance, and the emissivity is not smaller than 0.94.

The invention discloses a high-temperature anticorrosive coating for a locomotive engine and a preparation method of the high-temperature anticorrosive coating, and in particular relates to a high-temperature anticorrosive coating on the surface of the locomotive engine by adopting an organic silicon system, belonging to the technical field of chemical engineering paints. An inorganic high-temperature-resistant anticorrosive wearable coating is developed by taking organic silicon resin and high-purity aluminium oxide as main film forming matters, iron oxide as a conditioning agent and high-purity kaolin, nano calcium carbonate and nanometer magnesia as functional filling materials; the coating can automatically react on a metallic surface at high temperature in the use process so as to generate a compact ceramic glaze protective layer; furthermore, a metal complexing layer having high adhesion property is formed on the metallic surface within a short time; the coating can be used at more than or equal to 1350 DEG C for a long time; and the coating has excellent high-temperature-resistant corrosion property, wear-resisting property, high and low temperature impact property and the like.

A miniature dual-diaphragm electromagnetic valve with autocontroller of fluid medium is composed of an electromagnetic assembly and a valve body assembly. Said electromagnetic assembly consists of valve sleeve, hollow iron barrier, lower spring and its regulator, valve core, electromagnetic coil and electromagnetic end cover. Said valve body assembly consists of main valve body with 2 or more channels, upper and lower diaphragms, axial force-transferring rod, cover, elestic head for manual switch, and spring.

The invention discloses a method for preparing sponge titanium on a special resistance furnace by a molten salt electrolysis method. The method comprises the following steps of: placing a crucible (1) filled with a calcium chloride molten salt (19) into a vacuum reactor (2); performing low-constant-temperature water-pumping treatment on the calcium chloride molten salt in the crucible at first; after water is removed, charging argon via an argon inlet tube (11), and cooling a furnace upper cover (16) via a water jacket (6); heating the special resistance furnace (3) to 1000 DEG C at a constant speed; automatically lowering two electrode rods (14) via a lifting rod (13) to cause titanium dioxide (7) and a graphite plate (17) to enter in the crucible, and controlling currents to be 50 A; exhausting the carbon monoxide and carbon dioxide generated by electrolysis, and the remainder argon into a waste gas recovery tank via a gas outlet tube (15); and when the vacuum reactor is automatically cooled to a room temperature along with a furnace body, lifting the furnace upper cover and a fire-resistant cover (8) out of the furnace body via the lifting rod under the action of a limit baffle (9), and taking out the electrolysed titanium dioxide.

The invention discloses a Cu-Ni-Si alloy material and a cooling roller sleeve containing the alloy. The Cu-Ni-Si alloy is composed of the following components by weight percentage: 3-7% of Ni, 0.8-2.2% of Si, and the balance of Cu and unavoidable impurities. The Cu-Ni-Si alloy comprising the components is applied to the cooling roller sleeve for the amorphous/nano-crystal strip production and a novel cooling roller composite structure roller sleeve is provided. The composite roller sleeve is composed of an inner layer and an outer layer, wherein the outer layer is a Cu-Ni-Si alloy and the inner layer is brass with low cost. The Cu-Ni-Si alloy sleeve is free of an expensive metal Be, cheaper than the beryllium copper, safe and environmentally friendly, so that the amorphous strip lamination coefficient and the finished product ratio can be effectively improved and the service life of the copper roller is prolonged. The composite roller sleeve disclosed by the invention is simple in structure and additionally the material cost is reduced.

The present invention relates to a preparation method of a high temperature CMAS and rain corrosion-resistant composite thermal barrier coating. The method includes the following steps: step 1: mechanically mixing Gd2Zr2O7 powder and Al2O3 powder to form mixed powder, then adding a binder, stirring and performing ultrasonic shaking to obtain Gd2Zr2O7/Al2O3 composite powder; step 2: performing sandblasting to the surface of the metallic matrix material of the desired coating, then coating a bonding layer on the surface of the metallic matrix material after sand blasting, and completing pre-treatment to the metallic matrix material; and step 3: using a method of plasma coating to spray the Gd2Zr2O7/Al2O3 composite powder to the surface of the metallic matrix material so as to form a Gd2Zr2O7/Al2O3 composite coating. The preparation method of the present invention improves the high-temperature resistance and corrosion resistance of the thermal barrier coating, and overcomes the performance defect of the coating under high temperature CMAS and rain corrosion.

The invention relates to a coating for a furnace wall on the internal side of the furnace body of a polycrystalline silicon reduction furnace (a lining coating for short) and a production method of the coating, in particular to a lining anticorrosive infrared reflection coating of an improved-Siemens-process polycrystalline silicon reduction furnace. The coating is made of a metal-ceramic material. The coating is directly coated on the furnace wall on the internal side of the furnace body of the improved-Siemens-process polycrystalline silicon reduction furnace. The adopted coating method is a physical vapor deposition method or a chemical vapor deposition method. The thickness of the lining coating of the polycrystalline silicon reduction furnace is 1-10 micrometers, the production cost is low and the adhesive force of the coating on the furnace wall is strong. The coating can resist high temperature, strong acid and alkali corrosion and mechanical impact and scraping, the infrared reflection efficiency is high, the service life is long and the loss of heat in the improved-Siemens-process polycrystalline silicon reduction furnace because of heat transfer towards the outside of the furnace can be effectively reduced. Since the coating replaces a pure-gold infrared reflection coating, the expense of the coating material is greatly decreased and the cost of producing polycrystalline silicon products by adopting an improved Siemens process can be greatly decreased.

The invention discloses a refractory brick and a preparation method thereof. The refractory brick is prepared from, by weight, 50-60% of fused magnesia particles, 0-15% of fused magnesia powder, 0-20% of fused spinel particles, 0-20% of fused spinel powder, 0-9% of fused spinel micro powder and 1-6% of compound admixtures; secondary spinel is generated through the amphigama of the fused spinel micro powder and sintering activity in the high-temperature use process, volume expansion caused by an electric smelting method or a sintering method is avoided, and the medium-temperature strength and normal-temperature strength are improved; the critical grain size of the components is increased, a firm framework structure is provided for the refractory brick, and high-temperature strength is improved; the refractory brick and the preparation method thereof are used for solving the technical problem that in the prior art, an refractory brick cannot integrate environmental protection and strength; the refractory brick is environmentally friendly and high in strength.

The invention provides a ceramic identification coating suitable for a metal substrate and a preparation method of the ceramic identification coating. The ceramic identification coating is particularly suitable for a metal substrate in a power plant boiler. The ceramic identification coating is composed of a base layer and a surface layer. The base layer is also called as an identification layer and is white, and the thickness of the base layer is 0.10-0.15 mm; the surface layer is green, and the thickness of the surface layer is 0.10-0.15 mm; and the color difference between the surface layerand the base layer is obvious, and an identification degree is high. In the using process of the ceramic identification coating, sand blasting is not needed when the base layer part is exposed and the surface layer is re-sprayed; and after floating ash on a heating surface is blown and cleaned through high-pressure air or high-pressure water, surface layer paint can be directly sprayed to the part, where the white base layer is exposed, of the ceramic identification coating. The ceramic identification coating has the functions of resisting high-temperature corrosion, resisting dirt adhesion and coking and improving heat exchange efficiency, the service life of the substrate can be effectively prolonged, the manpower and economic cost of subsequent maintenance is remarkably reduced, and long-life-cycle protection of the heating surface is achieved.

An electrode for a spark ignition device, including a spark plug, which includes an alloy consisting essentially of, in weight percent, at least 15% Ni and the balance substantially Pt, and more particularly 15-45% Ni and the balance substantially Pt; 5-35% W, and the balance substantially Pd; and 5-15% Ni, 5-15% Pt, less than 10% Ir, and the balance substantially Pd.

The invention relates to a nanocomposite and a nanocomposite furnace tube. The nanocomposite is used for solving the problems of high-temperature corrosion, wear resistance, sticking pollution and slag formation resistance and low heat transfer efficiency of the furnace tube. According to the technical scheme, the designed nanocomposite prepared from different proportions of a binder, borax, silicon dioxide, zinc oxide, zirconium oxide, cerium oxide, aluminum oxide, magnesium oxide, calcium oxide, silicon phosphate, titanium oxide, silicon nitride and silicon carbide is sprayed on the common furnace tube, and the common furnace tube is fired by heating to 500 DEG C so as to form the composite furnace tube. The nanocomposite and the nanocomposite furnace tube have the advantages that a construction process is simple and easy to operate, the combination degree of the nanocomposite and the furnace tube is high, the nanocomposite furnace tube has strong thermal shock resistance and high temperature corrosion resistance and is free of pollution and slag formation and high in emissivity, and energy sources are saved. The nanocomposite can be widely applied to the furnace tubes of bath boilers heated by fire coal, fuel oil, gas and biomass, small and medium-sized industrial boilers, petroleum and petrochemical boilers, power station boilers and heating furnaces.

The invention discloses a composite copper bush for cooling. The composite copper bush comprises an outer copper bush, a horizontal high-heat-conductivity material layer and an inner copper bush which are laminated together closely and sequentially from outside to inside, the outer copper bush is prepared from chromium zirconium copper, and the outer copper bush is prepared from oxygen-free copper. The composite copper bush has high cooling efficiency, can improve performance of amorphous and nanocrystalline products, and can increase product percent of pass of amorphous and nanocrystalline belting equipment. The invention further discloses a preparation method of the composite copper bush.

The invention discloses a martensite alloy steel material used for an air valve of an internal combustion engine. The alloy steel material comprises following elements by weight: 0.6-0.8% of carbon, 0.2-0.3% of silicon, 3.3-3.5% of manganese, 0.4-0.5% of chromium, 0.03-0.05% of molybdenum, 0.004-0.005% of vanadium, 0.06-0.08% of Ti, 2.3-2.5% of Ni, 0.01-0.03% of Sb, S not more than 0.030% and P not more than 0.030%, with the balance being iron. According to the alloy steel material and the method, by using composition of the antimony and other raw materials, and by reasonably arranging the ratio and the production technology and reasonably arranging the adding sequence, the alloy material formed has characteristics of high strength, high hardness, good wear resistance, good toughness, resistance to high-temperature corrosion, oxidation resistance, and the like. The alloy steel material is suitable for the air valve of the internal combustion engine so that the air valve has high air tightness. A portion of waste iron is used as a raw material to make the alloy quality stable and uniform. By addition of a refining agent, the porosity degree is reduced by 1-2 degrees.

The invention discloses a high-temperature-corrosion-resistant wear-resistant paint for power plant boiler pipelines and a preparation method thereof, and particularly relates to a high-temperature-corrosion-resistant wear-resistant coating prepared from an inorganic mineral material on a power plant boiler pipeline surface and a preparation method thereof, belonging to the technical field of chemical paints. The paint is composed of an epoxy resin E-20, an organosilicon low polymer, kaolin, wollastonite, talcum powder, potash feldspar, albite and nano calcium carbonate. The paint is a high-temperature corrosion-resistant developed by using the inorganic mineral as the raw material, solves the problems of high-temperature high-pressure corrosion, scour abrasion resistance and the like in the boiler pipeline, prolongs the pipeline replacement period, and enhances the benefit of the power generation industry.

The invention discloses a ball valve surface laser cladding nickel-based material and an additive manufacturing process thereof. The nickel-based material is prepared from the following chemical components in percentage by mass: 2.0-4.0% of B, 0.3-1% of C, 10.0-20.0% of Cr, 2.5-4.5% of Fe, 3.0-5.0% of Si, 10.0-20.0% of W and the balance of Ni. The method is mainly used for valve trim additive manufacturing of a ball valve, meets the working condition requirements of the surfaces of the valve ball and a ball seat through process transformation and material change, meets the requirements for high hardening, high-temperature corrosion resistance and high-temperature abrasion resistance of the surface of base metal, and achieves a low-cost and high-performance surface treatment process throughcontinuous research, development and innovation.

The invention provides a high-temperature fan corrosion-resistant alloy. The alloy comprises the following elements, in percentage by weight, of 0.05% to 0.10% of C, less than or equal to 0.70% of Si,less than or equal to 0.70% of Mn, less than or equal to 0.012% of P, less than or equal to 0.008% of S, 20.0% to 23.0% of Cr, 0.60% to 1.50% of Al, less than or equal to 2.0% of Fe, 10.0% to 13.0% of Co, 0.20% to 0.60% of Ti and the balance Ni and inevitable impurities. A preparation method of the high-temperature fan corrosion-resistant alloy comprises the steps of raw material preparation, vacuum smelting, electroslag remelting, forging, plate rolling and heat treatment. According to the alloy and the method, components and a process of the alloy are optimally designed, the alloy has the advantages of being good in high-temperature strength, high in high-temperature corrosion resistance and high in oxidation resistance, and the service life of a high-temperature fan can be prolonged.

The invention relates to a preparation method of an anti-coking composite ceramic coating for a power station boiler, and belongs to the technical field of high-temperature protective coatings. The invention particularly relates to an anti-coking composite ceramic coating material and a preparation method thereof. The composite ceramic coating material is composed of a thermal chemical reaction ceramic bottom layer and a surface glaze layer. The thermal chemical reaction ceramic bottom layer comprises the following raw materials: aggregate, a binder, a dispersing agent and water; the aggregate is prepared by uniformly mixing chrome green, boron nitride and aluminum oxide; the binder is prepared by uniformly mixing phosphoric acid with the mass concentration of 85%, magnesium oxide, aluminum hydroxide, zinc oxide and deionized water; the dispersing agent is polyacrylic acid. The bonding strength of the anti-coking composite ceramic coating is 26.6-30.2 Mpa, the high temperature corrosion resistance index is 0.116-0.158 mg/mm < 2 >, and the thermal shock resistance index is 7-15. The boiler surface is effectively prevented from coking, and the heat efficiency of the boiler is improved to a small extent. And the actual service life of the coating can exceed 10000 hours, so that the use safety and the service life of the boiler are prolonged.

The invention relates to a preparation method of a CMAS high temperature and corrosion resistant composite thermal barrier coating. The preparation method comprises the steps that LZ ceramic powders and Al2O3 powders are mechanically mixed, and LZ/Al2O3 composite powders are obtained by ultrasonic concussion, and then the LZ/Al2O3 composite coating with Al2O3 content being 5%-30% is synthesized byplasma spray. According to the preparation method of the CMAS high temperature and corrosion resistant composite thermal barrier coating, the thermal shock resistance of TBCs is improved, and the defect of the loss of corrosion resistance of a coating in CMAS environment is overcome.

The invention discloses an alloy material with wear resistance and high-temperature erosion resistance. The alloy material comprises nickel, carbon, cobalt, boron, silicon, phosphorus, tungsten, beryllium, copper and other substances. Meanwhile, the invention further discloses a surface treatment method for a mold copper plate and the mold copper plate. The surface treatment method for the mold copper plate includes the following steps: 1) polishing, 2) cleaning, and 3) laser 3D printing, and further includes a cooling step. The surface of the mold copper plate is provided with an alloy material layer with wear resistance and high-temperature erosion resistance, and the thickness of the alloy material layer is 0.1-2.5 mm. The mold copper plate prepared by the surface treatment method for the mold copper plate by using the alloy material with wear resistance and high-temperature erosion resistance has higher hardness, a smaller average friction coefficient, better wear resistance, higher high-temperature erosion performance and higher density and tensile performance.