877results about How to "Guaranteed corrosion resistance" patented technology

The invention provides nanometer spray plating for a silver mirror, namely obtain a high glaze metal mirror face by adopting coating technique, which is similar to the brand new decorative effect of plating. The whole technique consists of a paint bottom layer, a metal reflecting layer (spray plating layer) and a paint surface layer. The coating has excellent adhesive attraction, shock resistance, corrosion resistance, weather resistance and marresistance, has rich colors and is bright like a mirror. The nanometer spray plating can be used to various materials such as metal, resin, ABS, PC, PP+PS carbon element resin, plastic, glass, pottery and porcelain, acrylic, wood, plastic wood and calcium plastic.

The invention discloses a method for welding composited tube at the bonding interface of carbon steel/stainless steel machinery, comprising the following steps: 1. welding groove treatment as follows:removing a section of stainless steel lined tube; processing the interior of the carbon steel parent tube exposed outside after removing the stainless steel lined tube into an inclined plane inclinedinwards from exterior to interior; using a tungsten electrode argon arc welding machine to carry out bead weld on the inclined plane from interior to exterior and forming multiple stainless steel bead weld layers; processing the weld surface of the carbon steel parent tube into a V-shaped groove; 2. backing weld: when fitting up the stainless steel bead weld layers before backing weld, adopting the tungsten electrode argon arc welding machine to carry out fitting-up and fixing in a manner of spot welding; 3. transition weld; and 4. carbon steel parent tube weld. The invention features simpleprocedure steps, less used weld materials, high weld pass percentage, good welding line mechanical property, high weld quality and improved production efficiency simultaneously.

The invention discloses a stainless steel compound welding steel pipe and a manufacturing method thereof. The stainless steel compound welding steel pipe is formed by welding stainless steel compound hotly-rolled rolling plates through a welding line, wherein the welding line is formed by a stainless steel compound welding line and a carbon steel welding line. The manufacturing method comprises the following steps of: milling an edge and arranging a groove; when putting a stainless steel compound layer on the inner layer, firstly utilizing gas shield welding to weld a middle layer; then, utilizing a stainless steel welding strip to weld a stainless steel compound layer welding line in an argon arc welding manner; then, utilizing a carbon steel welding strip to weld the carbon steel welding line by a submerged-arc welding manner; when the stainless steel layer is less than 0.9 mm, directly welding a stainless steel welding line by submerged-arc welding; and when the stainless steel compound layer is located at the outer layer, firstly welding the carbon steel welding line by adopting the carbon steel welding strip and the submerged-arc welding, and adopting the stainless steel welding strip and the argon arc welding manner to weld the stainless steel compound layer welding line. According to the stainless steel compound welding steel pipe and the manufacturing method thereof, the manufactured stainless steel compound welding steel pipe has high structural strength and strong corrosion resistance; and the bonding strength of an inner pipe and an outer pipe is not less than 200 MPa.

A method of biolization to the surface of inorganic material includes the following steps: the surface is spattered to form a tantalum oxide or a titanium oxide thin film; and then the inorganic material is put in a plasma immersion ion implantation device; after vacuumization, hydrogen, water vapour or ammonia is fed in, with gas pressure 0.05 to 50 Pa; the radio frequency discharge power is 200 to 1200W; the range value of the loaded pulse high-voltage power is 1KV to 100KV, the frequency is 50 to 40000HZ, and the duty ratio is 3 percent to 80 percent; the heating temperature is 20 to 500 DEG C; the treatment time is 0.1 to 5 hours; finally, the inorganic material is put into 10 to 100mg/mL albumin or heparin solution to be soaked for 2 to 48 hours under 20 to 40 DEG C soaking temperature. The method does not damage the activity of the biomolecule and the protein; the prepared inorganic material with biolized surface has good anti-coagulability, is used for medical blood vessel scaffolds and artificial heart valves, and can greatly improve the product performance.

The present invention relates to magnesium alloy surface treating technology, and is especially chemical nickel plating process for magnesium alloy. The operation process includes the following steps: activating or finishing magnesium alloy through polishing or grinding, degreasing and acid pickling with acid fluoride bearing solution at 20-60 deg.c for 0.5-5 min; pre-treating with water solution containing fluoride bearing compound, iron bearing compound and complex at 15-45 deg.c for 5-30 min; and chemically nickel plating. The said process can make chemical nickel coating with homogeneous thickness, firm combination with substrate, high corrosion resistance and metal appearance. The process of the present invention has low cost and less environmental pollution and is suitable for industrial production.

The invention discloses a welding method of a deck structure of a stainless steel compound plate of a railway steel bridge, which comprises the following steps: selecting structural steel for a bridge with thickness of 16-20mm as a base layer, selecting austenitic stainless steel with thickness of 2-4mm as a multiple layer, and removing 3-6mm of cladding material materials at each of two edges of welding grooves in advance, wherein the groove angle is 45-65 degrees, and the groove spacing is 4-8mm; the method comprises the following steps: firstly, assembling positioned welding, and then, carrying out backing welding by CO2 gas shielded welding; then, carrying out welding of the base layer by submerged-arc welding; and finally, carrying out welding of a transition layer and the multiple layer by the CO2 gas shielded welding. By adopting a specific groove type, the invention eliminates uncertain human factors and solves the problems that the thickness of the deposited metal of the base layer is insufficient, the multiple layer can be molten by mistake when the substrate layer is welded, and the like; the reverse formation is good, so that the reverse back gouging process is omitted; and the invention has the advantages of good assembly quality and easy realization of mechanization and automation, improves the production efficiency, and is convenient for ensuring the corrosion resistance of the multiple layer.

The invention discloses a double-plastics finned wound corrugated pipe and a method for manufacturing the same. A pipe wall of the double-plastics finned wound corrugated pipe is in the shape of a corrugated pipe which is squeezed and inflated and is integrated by means of spirally winding and hot melting, a bell socket and a spigot socket are respectively formed in two ends of the double-plastics finned wound corrugated pipe, cavities are arranged in corrugations of the pipe wall, strip-shaped plastic reinforcing ribs are arranged in the cavities and are perpendicular to the pipe wall, the outer edge of each plastic reinforcing rib is connected with a crest ring surface of the corresponding cavity by means of hot melting, and the inner edge of each plastic reinforcing rib is annularly connected with the other surface of the corresponding cavity by means of hot melting. The double-plastics finned wound corrugated pipe and the method have the advantages that the double-plastics finned wound corrugated pipe is good in ring stiffness and corrosion resistance and long in service life, and future maintenance investment is nearly zero; the bell socket and the spigot socket are connected with each other by means of electric hot melting, so that a system is good in airtight property, and forming machines implemented in a manufacturing procedure are simple and are low in investment and cost; the double-plastics finned wound corrugated pipe and the method can be widely applied to wall pipes with large and super-large apertures for drain and blowdown structures.

The invention belongs to the technical field of multipore ceramic materials and preparation thereof, and particularly relates to a gradient-porosity pure silicon carbide membrane tube and a preparation method thereof. The gradient-porosity pure silicon carbide membrane tube consists of pure SiC; a gradient filter structure consists of a supporting body layer and a surface membrane layer, wherein the supporting body is formed by stacking and combining roughly granular SiC, and the average aperture is 5-120 mu m; the surface membrane layer is formed by stacking and combining finely granular SiC, and the aperture is 0.1-20 mu m; and the whole porosity of the membrane tube is 25-50%. The preparation method comprises burdening, forming the supporting body, preparing the membrane layer and sintering, wherein forming is performed under equal static pressure; the forming pressure is controlled between 40 and 150MPa; the sintering temperature is controlled between 1,500 and 2,400 DEG C; and heat is preserved for 0.5-5 hours. The method is easy to implement, and the performance of a product can be guaranteed. The gradient-porosity pure silicon carbide membrane tube can be used under an oxidization atmosphere and a reduction atmosphere, is high in acid and alkaline corrosion resistance and can be applied to gas chemical engineering and integrated gasification combined cycle (IGCC) and pressurized fluidized bed combustion (PFBC) power generation and used for filtering and purifying various types of high- and low- temperature fluid, such as high-temperature flue, automobile tail gas, water and the like.

The invention discloses a method for preparing a silicon carbide ceramic impeller through gel casting and pressureless sintering, and provides a preparation method of a pressureless sintered silicon carbide ceramic impeller with a complex and accurate shape characteristic and an external diameter size capable of reaching over 160 mm. A silicon carbide solid-phase sintering formula system of a boron-containing sintering auxiliary agent and a gel casting and pressureless sintering process are adopted; and the method comprises eight steps of: preparing ceramic slurry; performing injection molding; demolding; drying; machining; degumming; performing pressureless sintering; and machining. According to the method, the technical problems of non-uniform mixing of large-scale ceramic slurry in gel casting, dryness, crack and deformation in a pressureless sintering process and the like are solved, and finally, preparation of the pressureless sintered silicon carbide ceramic impeller is realized. The impeller has good performance such as corrosion resistance, wear resistance, high temperature resistance and the like, and can be widely applied to a centrifugal pump for corrosive liquid conveying of various industries.

The invention belongs to the field of high-strength stainless steel and provides martensite aging stainless steel which is high in toughness and good in corrosion resistance. The strength of the martensite aging stainless steel reaches 2000 MPa or above. The specific chemical constituents of the martensite aging stainless steel comprise, by weight percentage, less than or equal to 0.03% of C, 13.0-14.0% of Cr, 5.5-7.0% of Ni, 5.5-7.5% of Co, 3.0-5.0% of Mo, 1.9-2.5% of Ti, less than or equal to 0.1% of Si, less than or equal to 0.1% of Mn, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance Fe. The stainless steel has the excellent seawater corrosion resistance; the pitting potential Epit is greater than or equal to 0.15 V, and high tough fit is achieved; sigma b is greater than or equal to 2000 MPa, sigma 0.2 is greater than or equal to 1700 MPa, delta is greater than or equal to 8%, and psi is greater than or equal to 40%; the martensite aging stainlesssteel is applicable to manufacturing of high-strength and high-toughness structural components used in a chloridion-containing rigorous corrosion environment such as seawater; the content of preciousmetal Co in the steel is low; material production cost is effectively lowered; and wide application prospect is achieved.

The invention relates to a process for preparing cresol which comprises, feeding the stainless steel base material to be treated into ion implantation equipment for antibiotic ion implantation, then performing antibiotic treatment. The antibiotic ions are Cu or Au ions.

The invention discloses a manufacturing method of an alloy tubular product. The manufacturing method is characterized in that the method comprises the the steps of melting NS1402 alloy steel to be made into rods; sawing the rods into short cut materials, centering the short cut materials, and manufacturing the short cut materials into centering materials; heating the centering materials to the temperature being 950 DEG C, keeping the temperature for 20-30min, then heating the centering materials to the temperature being 1100 DEG C-1120 DEG C, and keeping the temperature for 15-20min, and subsequently, conducting hot punching on the centering materials to be manufactured into a tube blank; rolling the tube blank by 1 to 5 passes so as to manufacture the tube blank into a cold rolled tube; and conducting protective atmosphere solution treatment on the cold rolled tube to manufacture the alloy tubular product. Due to the adoption of the method, the production process is relatively simple, the yield is high, the production cost is low, the performance of the tubular product is good, and the produced alloy tubular product can be widely applied to the fields such as oil, chemical industry and the like.

The invention relates to Ni-based corrosion resistant alloy for a high-acidity oil-gas field and a manufacturing method of an oil casing of the Ni-based corrosion resistant alloy for the high-acidity oil-gas field. The Ni-based corrosion resistant alloy comprises the following chemical components by weight percent: smaller than or equal to 0.03% of C, 21.0-24.0% of Cr, 18.0-20.0% of Fe, 7.0-9.0% of Mo, 1.5-2.0% of Cu, smaller than or equal to 3.0% of Co, smaller than or equal to 3.0% of W, smaller than or equal to 0.50% of Nb and Ta, smaller than or equal to 0.50% of Ti, smaller than or equal to 0.5% of Si, smaller than or equal to 0.5% of Mn, smaller than or equal to 0.003% of S, smaller than or equal to 0.005% of P, and smaller than or equal to 0.012% of N, wherein the total amount of (Mo+0.5*W) is 7.0-10.0%, and the numerical value of (Ti/6+(Nb+Ta)/8)/(C+N) is greater than or equal to 1 and smaller than or equal to 2. The manufacturing method comprises the following steps: I smelting, to be specific, smelting electroslag refining ingots; II tube blank processing; III tube making including hot-extrusion, reaming and solution treatment, wherein the grain size of a crude tube is 4-7 grade, the hot-extruded crude pipe is cold-rolled into a finished seamless tube, the total cold-rolling pass deformation amount is 30-61%, the cold-rolling speed is 25-35 times/min. The Ni-based corrosion resistant alloy and the oil casing manufactured are excellent in corrosion resistance.

The invention belongs to the field of porous ceramic materials and discloses a silicon carbide filtering film and a low temperature preparation method thereof. The silicon carbide filtering film comprises pure SiC, a surface film layer is prepared from fine grain silicon carbide through accumulation, has the pore diameter of 20 nanometers to 20 micrometers and film layer porosity of 40-50% and has high through porosity, low pressure drop, high strength, good thermal shock resistance and a high usage temperature. Film slurry is prepared from fine silicon carbide particles, an organosilicon precursor and a pore forming agent additive, the surface is spray-coated with the film slurry so that a film layer is formed, and the film layer is dried and sintered so that a pure silicon carbide film is obtained. The organosilicon precursor is cracked to produce a coupling phase, a sintering temperature is low, an aperture structure can be controlled easily, and the film layer can be used in an oxidation atmosphere and in a reduction atmosphere, has strong acid and base resistance and can be used for various high and low temperature fluid filtering purification such as coal gasification chemical engineering, IGCC and PFBC coal gasification generating, and high temperature flue gas, automobile exhaust and water purification.

The invention provides an oxide scale control method for improving the corrosion resistance of a hot rolled medium plate and belongs to the technical field of metallurgy. The control method comprises the steps that smelting molten steel is made into a plate billet in a continuous casting mode, and the plate billet is heated, subjected to heat preservation and then roughly descaled, wherein the rough descaling pressure is larger than or equal to 16 MPa, and the rough descaling time is 4-10 seconds; the plate billet is subjected to rough rolling and then finish rolling, and finish descaling is conducted before an odd number of secondary finish rolling stages, wherein the finish descaling pressure is larger than or equal to 16 MPa, and the finish descaling time is 4-10 seconds; after being subjected to finish rolling, the plate billet is placed onto a cooling bed and cooled to the room temperature at the speed of 10-25 DEG C per second. According to the control method, a hot rolling process adjustment scheme is proposed according to an oxide scale structure of the hot rolled medium plate; the cooling speed of the plate billet on the cooling bed is controlled, the oxide scale structure is controlled reasonably by controlling the eutectoid reaction degree of FeO, and therefore the corrosion resistance of the surface of the hot rolled medium plate is improved; since existing equipment and process conditions in a steel mill are utilized, investment cost and production cost are not increased, and the corrosion resistance of the hot rolled medium plate is improved on the basis of guaranteeing the mechanical properties of the hot rolled medium plate.

The invention relates to a martensitic stainless steel forged piece and a forging and rolling heat treatment integrated production process. The martensitic stainless steel forged piece comprises the following chemical components: 0.4-0.7% of C, 0.1-0.3% of Si, 1.6-1.8% of Mn, 0.01% of P, 0.008% of S, 0.03-0.05% of Nb, 0.02-0.06% of V, 0.006-0.015% of Ti, 0.9-1.3% of Ni, 13.3-13.6% of Cr, 0.2-0.4% of Cu, 0.4-0.6% of Mo, 0.08-0.09% of N, 0.1-0.3% of Al, 0.008-0.009% of B, 0.1-0.3% of composite rare earth and the balance of Fe. According to the martensitic stainless steel forged piece disclosed by the invention, by limiting the components and process parameters, the corrosion resistance of the stainless steel forged piece is ensured, and the corrosion resistance at the part with splashing of water drops is especially improved.

The invention discloses an anti-corrosion heat-conducting coating for a heat exchanger and a preparation method of the coating. The formula of the anti-corrosion heating conducting coating comprises the following raw materials by weight percent: 30%-40% of matrix resin, 40%-50% of filler, 0.5%-1% of auxiliaries and 15%-25% of diluting agent, wherein the matrix resin is a mixture of resin A and resin B, the resin A is a SH-023-7 type organic silicon modified epoxy resin product, the resin B is a 2130 type phenolic resin product, and the filler is a mixture of 40%-55% of aluminum nitride, 10%-15% of glass powder, 15%-25% of barium sulfate and 10%-15% of titanium dioxide. With the coating provided by the invention, better anti-corrosion performance and heat-conducting performance of the heat exchanger are realized; and in the filler range, the heat conductivity of the coating is maximally up to 3.912W/(m.k).

The invention discloses a high-temperature resistant turbine blade. The turbine blade comprises the following chemical components in percentage by weight: 0.19-0.21% of C, 0.55-0.57% of Mn, 0.20-0.22% of Si, 0.38-0.40% of Al, 0.30-0.32% of V, 0.40-0.42% of Ti, 0.12-0.14% of Ni, 0.06-0.08% of Sn, 0.25-0.27% of Zr, no more than 0.025% of S, no more than 0.025% of P, no more than 0.20% of Cu, 0.20-0.22% of lanthanide serial rare earth, and the balance Fe. The invention further designs a production process of the turbine blade. The production process has the advantages of simplicity and low cost, helps to largely improve the impact toughness of the blade, enhance the high temperature resistance of the blade and prolong the service life of the blade through the nitridation surface treatment.