76results about How to "Excellent corrosion resistance" patented technology

This invention provides a high-nitrogen austenitic stainless steel superior to the conventional one both in the corrosion resistance and strength, despite a low Ni content, characterized in having a Fe content of 50% by mass or more; containing Cr: 15.0% by mass to 35.0% by mass, Mo: 0.05% by mass to 8.0% by mass %, Mn: 0.2% by mass to 10.0% by mass, Cu: 0.01% by mass to 4.0% by mass and N: 0.8% by mass to 1.5% by mass, both ends inclusive, having a C content of 0.20% by mass or less, a Si content of 2.0% by mass or less, a P content of 0.03% by mass or less, a S content of 0.05% by mass or less, a Ni content of 0.5% by mass or less, an Al content of 0.03% by mass or less, and an 0 content of 0.020% by mass or less; wherein the contents of Cr, Mo, N and Mn are adjusted so that a compositional parameter η expressed by the equation:

η≡(W_Cr+3.3W_Mo+16W_N)/W_Mn

• • where W_Cr is Cr content (% by mass), W_Mo is Mo content (% by mass) W_N is N content (% by mass) and W_Mn is Mn content (% by mass) has a value of 5 or above. and optionally further containing either one of, or both of: W: 0.01% by mass to 1.0% by mass; and Co: 0.01% by mass to 5.0% by mass, both ends inclusive; and optionally further containing at least one of: Ti: 0.01% by mass to 0.5% by mass; Nb: 0.01% by mass to 0.5% by mass; V: 0.01% by mass to 1.0% by mass; and Ta: 0.01% by mass to 0.5% by mass, both ends inclusive; and optionally further containing at least one of: B: 0.001% by mass to 0.01% by mass; Zr: 0.01% by mass to 0.50% by mass; Ca: 0.001% by mass to 0.01% by mass; and Mg: 0.001% by mass to 0.01% by mass, both ends inclusive; and optionally further containing either one of, or both of: Te: 0.005% by mass to 0.05% by mass; and Se: 0.01% by mass to 0.20% by mass, both ends inclusive.

A work 10 made of a hard wire rod of austenitic-stainless steel is pressed at a rolling reduction of 60% or greater, into a paddle-shaped end 10b, and then subjected to work hardening, making the hardness of the end 10b 550 Hv or greater. Afterwards, the paddle-shaped end 10b is cut through machining, forming a main body 10c of a medical knife and cutting blades 10d. As a result, a medical knife, which is easily fabricated, is corrosion resistant, has sufficient hardness and sharpness, high toughness preventing cracks, can be provided.

Embodiments in accordance with the invention realize a perpendicular magnetic record medium with a high media S/N and excellent corrosion resistance. In a perpendicular magnetic record medium in accordance with an embodiment of the present invention prepared by forming an adhesion layer, an underlayer, a seed layer, an intermediate layer, and a recording layer sequentially on a substrate, the seed layer is specified to have a laminated structure consisting of a first seed layer and a second seed layer. The first seed layer consists of an amorphous alloy containing Cr and the second seed layer consists of an amorphous alloy predominantly composed of Ni with an fcc structure.

The invention discloses an automobile body cover part. A vacuum introduction molding technique is utilized to form a carbon fiber hybrid resin-base composite material foam sandwich structure composite material. The carbon fiber hybrid reinforcing body comprises 60-90% (volume) of carbon fiber and 10-40% (volume) of glass fiber or second organic fiber. The invention can be used for obtaining an automobile body cover part which has the advantages of low density, high strength, high rigidity, high shock resistance, excellent fatigue property, excellent moisture resistance, excellent corrosion resistance, favorable surface effect and the like. The invention greatly prolongs the service life, enhances the safety and reliability, and saves the cost.

An aqueous bath for treating the surfaces of light metals and light metal alloys that does not contain hexavalent chromium or produce any other highly polluting effluent and that forms a highly corrosion-resistant and highly paint-adherent conversion coating has a pH from 1.0 to 7.0 and contains from 0.01 to 50 g/L of permanganic acid and/or salt(s) thereof and 0.01 to 20 g/L of at least one water soluble compound of titanium or zirconium.

The invention discloses low-temperature nickel-based solder for soldering. The nickel-based solder based on a NiCrSiP system comprises the following components by weight percentage: 21.5%-28% of Cr, 2.0%-3.5% of Si, 7.0%-9.0% of P and 59.5%-69.5% of Ni. The solder of the invention is superior to BNi-5 solder in both high-temperature strength and corrosion resistance, and the nickel-based solder is applicable to both the vacuum-soldering method and the method for soldering in a continuous soldering furnace under the protective atmosphere (such as nitrogen and ammonia decomposition atmosphere) and particularly suitable for soldering the metal carriers (stainless steel materials) in the automobile exhaust purifiers and automobile EGR (exhaust gas recirculation) system, thus absolutely substituting the existing BNi-5 solder.

An activating grinding aid for industrial waste residues is prepared from catalyst (1-8 wt.%), activating agent (30-80 wt.%), setting regulator (0-20 wt.%), grinding aid (3-12 wt.%) and carrier (3-30wt.%). Its advantages are effective use of industrial waste residues, low electric consumption of grinder, and improve cement performance.

The invention relates to a preparation method of silicon carbide ceramic, and particularly relates to solid-phase sintering silicon carbide bulletproof ceramic and a preparation method thereof. The silicon carbide bulletproof ceramic comprises the following raw materials by weight percent: 70-90% of submicron alpha-silicon carbide, 0.1-5% of boron carbide, 4-20% of resin and 5-20% of organic binder, wherein the density of the solid-phase sintering silicon carbide bulletproof ceramic is 3.14-3.16 g/cm<3>; the relative density is 97-98%; the three-point bending strength is 480-560 Mpa. The preparation method of the solid-phase sintering silicon carbide bulletproof ceramic comprises the following steps: mixing the raw materials, spray drying, compression molding and vacuum sintering. The technical scheme disclosed by the invention has simple and reasonable craft processes; the production cost can be effectively reduced; the density, the HRA hardness and three-point bending of the product are higher than the performance of the existing solid-phase sintering and reaction sintering silicon carbide ceramic; meanwhile, the corrosion resistance and the surface quality are also superior to those of the product produced by the existing method.

The invention provides a production formula and a production process for fiberglass-reinforced plastic container equipment. The preparation raw materials include a surface mat, a chopped strand mat, base-free fiberglass, spray yarns, resins, a curing agent, an accelerator, an anti-static agent and an anti-UV absorbent, wherein the weight ratio of the resins to the accelerator to the curing agent is 100: (1-3): (1-3), and the optimal weight ratio of the resins to the accelerator to the curing agent is 100: 1: 1. The lining forming process adopts an injection molding process; the demoulding process adopts a pneumatic ejection demoulding method; the inner lining butting process is performed by trimming, affixing of a support plate and precise alignment treating; the inner lining in the winding process is subjected to charging supporting and pressing; and the winding process uses 360-degree all-round three-dimensional envelope winding. The fiberglass-reinforced plastic container equipment provided by the invention has the advantages of excellent corrosion resistance, good anti-static property, excellent anti-aging property, long service life and so on.

The invention relates to high-strength high-toughness Al-Mg-Si-Cu wrought aluminum alloy and a preparation method thereof. The alloy comprises the following components in percentage by weight: 0.6-1.5wt% of Mg, 0.8-1.6wt% of Si, 0.2-0.8wt% of Cu, 0.2-1.0wt% of Mn, 0.1-0.4wt% of Cr, 0.01-0.1wt% of Ti, not more than 0.25wt% of Fe, not more than 0.15wt% of all inevitable impurities and the balance of Al. The preparation method of the alloy comprises the following steps of: preparing an alloy cast ingot by adopting a semi-continuous casting mode; then homogenizing: heating the cast ingot along with a circulating air furnace to 520-570 DEG C, carrying out heat insulation for 4-10 hours, and cooling in air; then carrying out heat processing and heat deformation: carrying out heat processing on the homogenized cast ingot in heat processing equipment, wherein the final heat processing temperature is not lower than 350 DEG C and the strain amount is not lower than 0.5; and finally carrying outheat treatment.

The invention provides a high-temperature-resistant high-performance alloyed fastener comprising following ingredients: 0.42% of C, 0.33% of Si, 0.70% of Mn, 0.030% or less of S, 0.030% or less of P, 1.10% of Cr, 0.025% or less of Ni, 0.025% or less of Cu, 0.20% of Mo, 0.24% of V, and 0.03% of Nb. The invention also provides a manufacturing technique used for production of the alloyed fastener. The manufacturing technique of the high-temperature-resistant high-performance alloyed fastener helps to solve a problem that: manufacturing techniques used for production of alloyed fasteners with a level of 12.9 or above have not been invented in domestic at present. The alloyed fastener produced by the manufacturing technique possesses high strength and hardness which are not possessed by common fasteners, and excellent plasticity, toughness, corrosion resistance, tensile strength, fatigue strength and delayed fracture resistance. The alloyed fastener is capable of ensuring that failures such as break and damage are not easy to happen in manufacturing process and using procedures, and can function normally at a highest temperature of 500 DEG C. Service life of the fastener is extremely prolonged.

The invention relates to a high-toughness and corrosion-resistant aluminum alloy profile for aerospace and a preparation method thereof. The problem that an existing aluminum alloy profile can not meet the use requirements of aerospace is solved. The aluminum alloy profile is made from smelting raw materials including Cu, Mg, Zn, Zr and Al, and the aluminum alloy profile made from an aluminum ingot, cathode copper, a primary magnesium ingot, a zinc ingot and an aluminum zirconium alloy ingot by smelting, casting, homogenizing annealing, hot extrusion, quenching, drawing and aging. According tothe high-toughness and corrosion-resistant aluminum alloy profile for the aerospace and the preparation method thereof, by optimizing of alloy composition, controlling of ingot casting quality, multi-stage homogenizing treatment technology, extrusion molding technology, and two-stage quenching and three-stage aging technology of strengthening-toughening heat treatment, the high-toughness and corrosion-resistant aluminum alloy profile is produced, the residual stress of the profile is effectively reduced by increasing the tension straightening quantity, and the subsequent machining precision of the profile is improved. The high-toughness and corrosion-resistant aluminum alloy profile for the aerospace is applied to the field of aluminum alloy profile preparation.

A highly corrosion resistant and highly formable aluminum-alloy clad material, a method for producing the same, a heat exchanger using the same and a method for producing the same are shown. The present aluminum-alloy clad material has an aluminum alloy core material, an intermediate layer material clad on one surface of the core material and a brazing filler metal clad on the surface of the intermediate layer material that is not on the core material side, wherein a crystal grain size of the intermediate layer material before brazing heating is 60 μm or more, and in a cross section of the core material in a rolling direction before brazing heating, when R1 (μm) represents the crystal grain size in a plate thickness direction, and R2 (μm) represents the crystal grain size in the rolling direction, R1/R2 is 0.30 or less.

A high-strength aluminum alloy extruded material contains Si: 0.70 to 1.3 mass %; Mg: 0.45 to 1.2 mass %; Cu: 0.15 to less than 0.40 mass %; Mn: 0.10 to 0.40 mass %; Cr: more than 0 to 0.06 mass %; Zr: 0.05 to 0.20 mass %; Ti: 0.005 to 0.15 mass %, Fe: 0.30 mass % or less; V: 0.01 mass % or less; the balance being Al and unavoidable impurities Crystallized products in the alloy have a particle diameter of a is 5 μm or less. Furthermore, an area ratio of a fibrous structure in a cross section parallel to an extruding direction during hot extrusion is 95% or more.

The invention discloses an electrodeposition method for preparing a chromium-carbon nano tube composite coating in trivalent chromium plating solution. The invention adds a carbon nano tube in a basis electrolyte comprising chromic chloride to prepare the chromium-carbon nano tube composite coating with smooth surface and firm combination with the substrate by controlling the proper process conditions. The invention has the advantages that the prepared chromium-carbon nano tube composite coating has a thickness of more than 5mum, and has higher hardness, abrasion resistance and corrosion resistance than the hexavalent chromium plating coating; and the method can replace the conventional hexavalent chromium plating process under a certain friction working condition.

A thermal decomposition apparatus for wastes comprises: a heating chamber; an inlet port; at least one pair of electrodes provided within the heating chamber; a plurality of balls each taking the shape of a sphere whose primary ingredient is carbon, provided between the at least one pair of electrodes so as to produce an electric discharge when a voltage is applied across the at least one pair of electrodes; an outlet port for discharging the gases into which the wastes are thermally decomposed; oxygen free or vacuum environment forming means or evacuating means.

According to the present invention, an inexpensive thermal decomposition apparatus for wastes is provided which thermally decomposes almost all wastes at a high temperature of not lower than about 3000° C. without producing harmful substances such as soot, dust, chlorine compounds; nitrogen compounds and/or dioxin.

A lower pole layer and/or an upper pole layer is formed by plating a soft magnetic film represented by the formula Fe_XNi_Yα_Z (wherein element α is at least one of Tc, Ru, Rh, Pd, Re, Os, Ir and Pt), wherein the composition ratio X of Fe is 65% by mass to 74% by mass, the composition ratio Y of Ni 25% by mass to 34% by mass, the composition ratio Z of the element α is 1% by mass to 7% by mass, and X+Y+Z=100% by mass. Therefore, a thin film magnetic head adaptable to a higher recording density and having excellent corrosion resistance can be manufactured.

The invention provides a nickel titanium memory alloy/polyurethane compound damping panel and a preparation method thereof and relates to a compound damping panel and the preparation method thereof. The invention aims to solve the technical problems that the present surface layer is a 316L stainless steel compound steel panel, the tensile strength is low, the corrosion resistance is inferior and the present compound damping material has inferior damping effect. The preparation method according to the invention comprises the following steps: placing a nickel titanium memory alloy panel and a polyurethane panel into a hot press, and then pressing for 5-20min under the conditions of 185-195 DEG C temperature and 40-50N pressure, and taking out and cooling in air. The tensile strength of the compound damping panel provided by the invention is 600-800MPa; the precipitation volume of nickel ions in Nacl solution is 0.17ug/ml; the tensile strength is high; the corrosion resistance is excellent; a damping loss factor can reach 0.2; the vibration-reducing and noise-reducing effects are good; and the compound damping panel can be widely applied to passenger cars, trains, ships and buildings.

A steel plate excellent in acid dew point corrosion resistance has a composition, in mass percent, from 0.001 to 0.15% of C, 0.80% or less of Si, 1.50% or less of Mn, 0.025% or less of P, 0.030% or less of S, from 0.10 to 1.00% of Cu, 0.50% or less of Ni, from 0.05 to 0.25% of Cr, 0.01 to 0.08% of Mo, 0.100% or less of Al, from 0 to 0.20% in total of Ti, Nb, and V, from 0 to 0.010% of B, from 0 to 0.10% in total of Sb and Sn, and a balance of Fe and unavoidable impurities, having a ferrite single phase structure, or a structure containing 30% by volume or less in total of one or more of cementite, pearlite, bainite, and martensite, with the balance ferrite phase. Ferrite crystal grains have an average crystal grain diameter of 12.0 mm or less.

The invention discloses a color steel tile with a graphite coating and a preparation method thereof. The color steel tile comprises a base plate located in a middle layer, and the two sides of the base plate are coated with coatings formed by graphite slurry. The graphite slurry is made of, by weight parts, 50-200 parts of fine flake graphite micro powder, 40-160 parts of cashew-nut oil modified phenolic resin or epoxy resin, 10-50 parts of polyvinyl acetal, 40-160 parts of alcohol, 2-10 parts of coupling agent, 2-10 parts of defoamer, 1-10 parts of plasticizer and 2-10 parts of liquid acrylonitrile butadiene rubber. The service life of the obtained color steel tile with the graphite coating can be greatly prolonged, problems that a conventional resin tile ages easily and is low in strength toughness and not resistant to flame and the like are solved; a problem that a conventional color steel tile is heavy in weight and difficult to install is solved; indoor and outdoor heat exchange rate can also be effectively increased, and a problem of high-temperature poor working environments of conventional color steel tile plants is solved; and a problem that at present, on the market the fine flake graphite is massively accumulated and is low in additional value is solved.

The invention discloses a grounding grid NiP-DLC composite corrosion resisting protection coating and preparing method. The coating comprises an NiP alloy coating covering the grounding grid material and a pure carbon type diamond coating covering the NiP alloy coating, wherein the NiP alloy coating is a corrosion resisting coating, and the pure carbon type diamond coating is a high hardness oxidation resistant coating. The coating preparing method comprises the steps that the NiP alloy coating is deposited on the surface of the grounding grid material in a chemical plating mode, and the pure carbon type diamond coating is deposited on the surface of the NiP alloy coating through an anode layer ion source in a vacuum cavity. The coating is more superior in abrasion resistance, corrosion resistance and oxidation resistance, and friendly to the environment. The method is simple in technology and high in deposition efficiency, and the coating is suitable for being produced on a large scale. The thick composite coating can be obtained based on the method, the service life of the coating can be greatly prolonged, and cost can be reduced.

A galvanized steel sheet includes a zinc plating layer which is disposed on a steel sheet containing 0.01% to 0.15% C, 0.001% to 2.0% Si, 0.1% to 3.0% Mn, 0.001% to 1.0% Al, 0.005% to 0.060% P, and 0.01% or less S on a mass basis, the remainder being Fe and unavoidable impurities, and which has a mass per unit area 20 g/m² to 120 g/m². An oxide of at least one selected from the group consisting of Fe, Si, Mn, Al, and P is present in a surface portion of the steel sheet that lies directly under the zinc plating layer and that extends up to 100 μm from the surface of a base steel sheet. The amount of the oxide per unit area is 0.05 g/m² or less in total. The steel sheet has excellent corrosion resistance, anti-powdering property during heavy machining, and strength.

The invention discloses a dissolved oxygen electrode, which consists of working electrode (2) and silver-silver chloride reference electrode (3), wherein two electrodes connect the electrode lead; the working electrode (2) is metal gold, which is packed by polyetheretherketone electrode chip (10) with part of electrode chip (10) outsides; encircling the reference electrode (3) on the surface of electrode chip (10); connecting the top of electrode chip (10) with the electrode cap (5) with the bottom in the oxygen penetration film sleeve (1) and connecting; placing the working electrode (2) and reference electrode (3) in the oxygen penetration film sleeve (1); setting the oxygen penetration film (8) at the bottom of oxygen penetration film sleeve (1). The invention improves the corrosion-proof property and sensibility, which is fit for on-line measurement of dissolved oxygen density.

An aluminum oxide sintered body of the invention includes: europium and nitrogen; and plate-like crystals having peaks coinciding with EuAl₁₂O₁₉ in an X-ray diffraction profile dispersed over a whole sintered body. Such an aluminum oxide sintered body can be obtained by: forming a mixed powder containing an alumina powder, a europium compound powder and an aluminum nitride powder into a green body having a predetermined shape; and sintering the green body under a non-oxidizing atmosphere.

The invention discloses a preparation method of a dendritic waterborne polyurethane-based high-molecular dye, a polymer polyol and a dendritic polyester polyol are subjected to dehydration treatment for 2-3 hours under the conditions that the temperature is 100-110 DEG C and the vacuum degree is less than or equal to 0.1 mpa; under the protection of nitrogen, the dendritic polyester polyol, polyisocyanate and a catalyst are sequentially added into a reaction container for reacting for 3-8 hours at the temperature of 90-95 DEG C; the polymer polyol and a solvent are added for reacting at 80-90DEG C for 2-3 hours; a hydrophilic chain extender and a catalyst are added for reacting at 70-80 DEG C for 2-3 hours; a small molecular dye and a solvent are added for reacting for 2-3 hours at the temperature of 60-80 DEG C; after cooling to 30-50 DEG C, a neutralizer is added reacting for 30-60 minutes; a salt forming agent is added, and dispersing is performed for 20-30 minutes at a high speed;and in a rotary evaporator, rotary stirring is performed to remove the solvent at the temperature of 75-80 DEG C to obtain the dendritic waterborne polyurethane-based high-molecular dye the dye; andthe dendritic waterborne polyurethane-based high-molecular dye the dye has the characteristics of high temperature resistance, chemical resistance and corrosion resistance.

The present disclosure relates to a chromium-aluminum binary alloy with excellent corrosion resistance and a method of producing the same, and more particularly to a chromium-aluminum binary alloy with excellent corrosion resistance, including: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy, and a method of producing a chromium-aluminum binary alloy with excellent corrosion resistance, the method including: (Step 1) mixing and melting a raw material comprising: 1 to 40% by weight of aluminum (Al), the balance of chromium (Cr), and other unavoidable impurities with respect to a total weight of the alloy; and (Step 2) solution treating the alloy melted in Step 1. The chromium-aluminum binary alloy may be easily produced and has ductility, thus being highly applicable as a coating material for a material requiring high-temperature corrosion resistance and wear resistance.

The invention belongs to the technical field of magnesium alloy processing, and provides a preparation process of a magnesium alloy wet-and-heat-resistant conductive-anti-corrosion chemical conversionfilm. According to the method, a magnesium alloy conductive-anti-corrosion chemical conversion film which is suitable for a wet and heat environment is prepared by combination of acid pickling pretreatment and chemical conversion treatment; reasonable two-phase height difference of the surface of magnesium alloy is obtained by the acid pickling pretreatment, and a sufficient growth space is reserved for formation of a Mg(OH)2 corrosion product on an alpha phase; the magnesium alloy which has been subjected to the acid pickling pretreatment is subjected to chemical conversion treatment to obtain a film layer which has a uniform and flat surface and is excellent in corrosion resistance; and the magnesium alloy which has been subjected to the acid pickling pretreatment is subjected to the chemical conversion treatment to obtain the film layer which is good in conductivity, and still has good conductivity in the wet and heat environment. The preparation process has the advantages of simplicity, simplicity and convenience in operation, low cost and the like, and has important significances on engineering application of the magnesium alloy in the field of 3C products.

A structure for supporting a sign board is disclosed. The structure includes: a post clamp having a pair of arched clamping bands which are hingedly coupled and joined to each other by a fastening element, at least one clamping band having a pillar; a hanger having a socket pipe joined to the pillar of the post clamp, a support bar inserted into the socket pipe and joined by a fastening element, the support bar having an axial coupling groove; at least one connector having a first coupling plate with a coupling bulge adapted to be fitted into the coupling groove of the support bar and with a first arched hinge holder, and a second coupling plate coupled to the first coupling plate having a second arched hinge holder; and a sign board having a coupling bulge and a guide slot through which the hinge holders of the connector pass.

The present invention provides a cationic electrodeposition coating composition comprising: a specific amino group-containing modified epoxy resin (A); a blocked polyisocyanate curing agent (B); a water-soluble zirconium compound (C); and sulfamic acid, wherein the water-soluble zirconium compound (C) is present in an amount of 10 to 10,000 ppm, calculated as the mass of the elemental zirconium, relative to the mass of the cationic electrodeposition coating composition.

The invention relates to a lead-acid storage battery and in particular relates to a grid structure of a lead-acid storage battery. The grid structure comprises a lead core net, wherein the lead core net comprises an edge frame, multiple transverse reinforcing ribs and multiple vertical reinforcing ribs; wrapping layers are arranged on the outer surfaces of the edge frame and the transverse and vertical reinforcing ribs; the wrapping layers refer to plastic layers, conductive plastic layers, ceramic layers or conductive ceramic layers; and the thickness of each wrapping layer is greater than or equal to 0.2mm and is smaller than or equal to 2mm. According to the grid structure disclosed by the invention, the wrapping layers are arranged on the outer surfaces of the edge frame and the transverse and vertical reinforcing ribs, so that the structural strength of the grid is improved, the possibility of deformation and breakage of the grid during use is reduced, and particularly phenomena, such as battery current collection, convergence and delivery failures, caused under the condition that the edge frame and the transverse and vertical reinforcing ribs are corroded in the process of using the grid can be avoided. Therefore, the grid structure of the lead-acid storage battery disclosed by the invention has the beneficial effects that the condition that the battery failure is caused due to the battery current collection, convergence and delivery failures which are caused by easiness in corrosion and breakage of the ribs difficultly occurs.