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 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 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.