36results about How to "Improve high temperature and corrosion resistance" patented technology

The invention discloses a nickel-based high-temperature alloy oxidation-resistance and corrosion-resistant protective coating and a preparation technique thereof. The protective coating is prepared from three elements including Cr, Al and Y through a pack cementation method. The protective coating is prepared from, by weight, 5-10% of Cr, 10-20% of Al, 1-2% of Y2O3, 6-10% of NH4Cl and the balance Al2O3. The preparation technique comprises the steps that raw materials are weighed accurately according to the weight percentage for preparation of the protective coating; then ball milling and drying are conducted; the raw materials are placed into a crucible after being dried; the raw materials are placed in a muffle furnace after being sealed and charged; and the muffle furnace is heated for 40-60 min to the temperature of 1050-1070 DEG C, heat preservation is conducted at the temperature of 1050-1070 DEG C for 2-3 h, then the temperature is decreased to 600 DEG C with the furnace, the raw materials are taken out and cooled to the room temperature, and finally, the protective coating can be obtained through cleaning and drying. According to the protective coating, a Cr-Al-Y coboronising layer is prepared on the surface of the nickel-based alloy, the technical problem that the nickel-based alloy is poor in high-temperature resistance and corrosion resistance is solved, the preparation technique is stable and reliable, the coating is good in binding force, uniform in structure and compact, and the coating thickness is controllable; and the preparation technique has the advantages of being simple, convenient to operate, high in efficiency, low in cost, easy to implement and the like.

The invention discloses a high-temperature water-wet maintenance simulation test device and method of cement stone of a thermal production well. The device is mainly composed of a nitrogen source (1),an intermediate water container (5), a CO2 gas source (10), a flowmetre (12), a closed kettle body A (13), a pressure gage (17), a condenser (19) and a heating furnace (22); cement stone (24) is putin the closed kettle body A (13); the closed kettle body A (13) is in the heating furnace (22); a water inlet is at the lower part of the side part of the kettle body A; the water inlet is separatelyconnected to the flowmetre (12) and a heating pressure manifold (11); the heating pressure manifold (11) is connected to the intermediate water container (5) and the nitrogen source (1), and also connected to the CO2 gas source (10); a water outlet is at the upper part of the side end of the kettle body A; the water outlet is connected to the pressure gage (17) and the condenser (19); the maintenance method can be used for simulating acid medium corrosion of cement stone of the thermal production well at different temperatures; and, if the closed kettle body A (13) is replaced by a closed kettle body B (25), the method can be used for testing the shear cementing strength and the channeling pressure of the cement stone in a high-temperature water-wet environment. The high-temperature water-wet maintenance simulation test device and method in the invention are reliable in principle and simple and convenient to operate, and have wide market prospect.

The invention relates to a nickel-based alloy surfacing welding process for an alloy tank. The welding process adopts a cold metal transition welding method, and the welding process uses molten electrode gas for shielded welding. When in use, the welding process of nickel-based alloy surfacing welding is carried out by cold metal transition welding, which greatly reduces the dilution rate of the surfacing welding surface, improves the high temperature resistance and corrosion resistance of the material, and saves welding materials. At the same time, the welding process adopts at least two multi-pass welding methods to fill the alloy tank, which can solve welding defects such as incomplete fusion and missing welding during welding, and ensure welding quality.

The invention relates to an aluminum electrolysis prebaked anode steel claw and belongs to the technical field of electrolytic aluminum industry, and particularly provides a novel high-conductivity prebaked anode steel claw which is good in conductivity, low in cost, small in deformation and long in service life. The novel high-conductivity prebaked anode steel claw comprises a cross beam, a claw head and a welding line. The material of the cross beam or the claw head is low-carbon low-silicon non-oriented electrical steel or other high-conductivity steel, and the cross beam and a steel claw are connected by consumable electrode mixed gas arc welding. According to the invention, through optimal selection of the cross beam and the claw head and selection of a proper welding process, anode drop is remarkably reduced, the electrical conductivity and the flexural behavior of the steel claw are improved, and the life of the anode steel claw is effectively prolonged, and therefore, economic benefit is improved.

The invention discloses a high-temperature-resistant and corrosion-resistant sinking roller and a manufacturing method thereof, which belong to the field of hot-dipping equipment. The high-temperature-resistant and corrosion-resistant sinking roller of the present invention includes a roller body and a roller shaft, the surfaces of the roller body and the roller shaft are both coated with a coating, and the coating material is made of raw materials with the following weight ratio: WC: 70~ 90 parts; Co: 8-15 parts; Cr 3 C 2 : 3 to 15 parts; the surface of the roller body is provided with grooves in the circumferential direction, and the bottom surface of the grooves is an arc transition surface; the roller body is made of 316L stainless steel; the roller shaft is made of stellite-chromium-cobalt alloy; the sinking roller of the present invention It is made by groove processing, pre-treatment, coating material preparation and supersonic flame spraying. The invention greatly slows down the corrosion speed of the sinking roller and effectively prolongs the service life of the sinking roller by spraying the coating material of specific composition on both the roller body and the roller shaft surface of the sinking roller.

The invention relates to a highly-permeable ultrafiltration composite ceramic coating film and a preparation method thereof, and belongs to the technical field of film separation. The highly-permeable ultrafiltration composite ceramic coating film comprises a ceramic base film, wherein the surface of the ceramic base film is sequentially provided with a silane coupling layer, a polyimide layer from interior to exterior; the mass ratio of the ceramic base film to the silane coupling layer to the polyimide layer is 1:(0.001 to 0.005):(0.01 to 0.1). The highly-permeable ultrafiltration composite ceramic coating film has the advantages that hyperbranched polyamide-amide is used as a pore passage building template, polyimide is used as a separating film, and the polyimide is grafted to the surface of the ceramic film in a covalent way by in-situ polymerizing, so that the composite separating film can simultaneously reach the high-selectivity and high-permeability advantages of a polymer film and high temperature-resistant and corrosion-resistant advantages of an inorganic film; the pore passage size and structure of the commercial ceramic film are improved, and the good permeability of the separating film is realized.

The invention relates to an impregnating layer for high temperature resistance and corrosion resistance surface modification of a nickel base alloy, and application of the impregnating layer. An impregnation agent comprises an Al-Y impregnation agent and a Cr-Y impregnation agent, wherein the Al-Y impregnation agent comprises the following components by weight percent: 10% to 15% of Al, 1% to 2% of Y2O3 and 6% to 10% of NH4Cl, and the balance being Al2O3; and the Cr-Y impregnation agent comprises the following components by weight percent: 12% to 18% of Cr, 1% to 2% of Y2O3 and 6% to 10% of NH4Cl, and the balance being Al2O3. A Cr-Al-Y composite impregnating layer can be prepared on the surface of the nickel base alloy through a two-step method by virtue of the impregnation agent, and the corrosion property of the obtained alloy is improved by 3 to 5 times compared with the corrosion property of a matrix alloy.

The invention discloses a processing method for a corrosion-resistant filler. The processing method comprises the steps of blending, crushing, mixing and ball grinding, water addition, clay preparation, forming, low-temperature drying, feeding into a kiln, firing and the like. According to the processing method, raw materials are mixed and ball-ground after being crushed in a filler processing process, so that crushing efficiency is improved, and the raw materials can be rapidly processed into required particle sizes; the surface of the filler is spray-coated with 1Cr13 and pure aluminum coatings, so that the corrosion resistance and the strength of the filler are further improved.