34results about How to "Reduce oxidation corrosion" patented technology

The invention relates to a boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and a manufacturing method thereof. The alloy comprises the following chemical components in percentage by weight: 0.3-0.6% of C, 1.6-2.6% of Si, 0.6-1.0% of Mn, 0.6-4.0% of Cr, 0.3-0.5% of Mo, 0.3-0.5% of Ni, 0.3-0.5% of Cu, 0.1-0.3% of Ti, 0.05-0.1% of B, 0.05-0.15% of Ce, 0.05-0.15% of Nb, less than 0.04% of P, less than 0.04% of S and the balance of Fe. The manufacturing method comprises the following steps: carrying out electric-furnace smelting, carrying out secondary aluminum insertion deoxidization, putting on the bottom of a casting ladle to form a casting, austenizing the casting at 850-950 DEG C, keeping the temperature for some time, putting in a salt bath at 200-260 DEG C to carry out primary isothermal quenching, keeping the temperature for 5-10 minutes, carrying out secondary isothermal quenching in a salt bath at 260-400 DEG C, keeping the temperature for 0.5-4 hours, and cooling in air to obtain the wear-resistant corrosion-resistant alloy of which the austenite-bainite base is distributed with boride. The alloy is low in preparation cost and suitable for marine silt erosion and corrosion environments, has favorable comprehensive properties of toughness, wear resistance and corrosion resistance, and can be used for dredger cutter teeth, slurry pipelines, centrifugal-pump impellers, blades and the like.

The connector includes an annular connector body that is substantially comprised of copper, and an annular insert portion made of brass and clad with tin. Apertures are made through the wall of the insert portion. The insert portion is configured to have an exterior frictionally fit within the connector body. Inserting a stranded aluminum cable into the annular insert portion and crimping the connector body, the insert portion and the cable, causes the outer strands of the stranded aluminum cable to be extruded through the plurality of apertures, removing oxide film on the exterior surface of the aluminum cable and forming a sealed electrical connection between the aluminum cable and the copper connector body.

The invention discloses a lead-free soft soldering. Calculated by weight percentage, the lead-free soft soldering consists of following compositions: 0.1 to 3.9 per cent of Al, 0.0001 to 0.5 per cent of Se and rest of Sn. The method of manufacturing the invention is: (a) after refined tin is added into a plumbago pot to be melted, temperature rises to 1100 DEG C. refined copper is added and evenly mixed. The refined tin and the refined copper are melted to be liquid tin copper alloy. The liquid tin and copper alloy becomes the alloy ingot of tin and copper after standing for 30 minutes; (b) the refined Ag is added and melted again and the temperature rises to above 1600 DEG C. Pure nickel is added and melted. The liquid Ag and nickel becomes the alloy ingot of Ag and selenium after standing for 30 minutes; (c) with the refined tin added into and melted and the temperature rising to above 600 to 1000 DEG C, covering agent is added to isolate the liquid level of tin from oxygen in the air. Pure selenium is added and melted. The liquid tin and selenium becomes the alloy ingot of tin and selenium after standing for 30 minutes; (d) three gold ingots, Ga or Cu and the rest of tin and put into a stainless steel kettle to be melted according to the required formulation, which can be made into a tin wire, a tin bar and a tin ball.

The invention discloses a method for improving the lead bismuth alloy corrosion resistance of a nuclear power structural material. According to the method for improving the lead bismuth alloy corrosion resistance of the nuclear power structural material, surface treatment is conducted on the nuclear power structural material through the surface nanocrystallization technology, the surface of the nuclear power structural material is made to form a gradient nano-structure and a structure refined structural layer, the nuclear power structural material obtained after surface nanocrystallization generates a compact passivation coating with the thickness smaller than 5 [mu]m in liquid-state lead bismuth alloy, the passivation coating relieves the corrosion of the nuclear power structural material in the liquid-state lead bismuth alloy, and therefore the lead bismuth alloy corrosion resistance of the nuclear power structural material is improved. After surface treatment, the thickness of the surface gradient nanometer crystals and the structure refined structural layer of the nuclear power structural material reaches over 150[mu]m, the surface crystallite dimension is refined to be below 50 nm, and the surface roughness Ra is controlled to be below 0.3 [mu]m. After the nuclear power structural material is treated by the adoption of the method, compared with the nuclear power structural material which is not treated, the lead bismuth alloy corrosion resistance of the nuclear power structural material can be significantly improved.

The invention discloses a method for preparing a dye sensitized solar cell with a stainless steel substrate, which includes the following steps: (1) placing the stainless steel substrate in pickle liquor for pickling treatment, (2) placing the stainless steel substrate after pickling in passivation solution for passivation treatment, (3) plating platinum on the surface of the passivated stainless steel substrate, and (4) assembling the platinum-plated stainless steel substrate serving as a counter electrode, an photoanode and electrolyte together to form the dye sensitized solar cell. By means of the method, the stainless steel substrate is performed with pickling and passivation treatment, the counter electrode used as the dye sensitized solar cell is sintered and plated with platinum at high temperature, a layer of stable oxidation film is formed on the stainless steel surface after passivation, and the layer of stable oxidation film effectively relieves oxidation corrosion on the stainless steel substrate during high-temperature platinum plating. Simultaneously, the layer of stable oxidation film prevents iodine-containing electrolyte from corroding the stainless steel substrate after the battery is formed through packaging, further pollution on the electrolyte caused by corrosion products is reduced, and long-period stability of the dye sensitized solar cell with the stainless steel substrate is effectively improved.

The invention discloses anti-oxidative and environment-friendly water-based paint remover. The water-based paint remover is prepared from raw materials in parts by weight as follows: 1.2-1.4 parts of nano-montmorillonite, 1.5-2 parts of a penetrant T, 42-46 parts of benzyl alcohol, 11-12 parts of acetone, 10-11 parts of hydrogen peroxide, 3-3.5 parts of methyl cellulose, 2-2.4 parts of urotropine, 1.3-1.5 parts of dodecyl benzene sulfonate, 1.6-1.9 parts of microporous starch, 2.2-2.5 parts of microcrystalline wax, 0.8-1 part of tetrabutyl titanate, a proper amount of ammonium hydroxide, a proper amount of ethanol, 50-55 parts of water, 1-1.3 parts of gluconic acid, 1-1.3 parts of butylated hydroxyanisole and 1-2 parts of menthol. The water-based paint remover has good permeability, can quickly peel a paint film, can also protect the surface of metal and prevent oxidation corrosion and has less irritation to human bodies due to adoption of gluconic acid, butylated hydroxyanisole and menthol.

The invention includes a catalysed membrane and membrane electrode assembly. The membrane and membrane electrode assembly comprise an ion-conducting membrane component comprising an ion-conducting membrane, an anode catalyst layer, and a cathode catalyst layer. The anode catalyst layer comprises a first electrocatalyst component comprising a first platinum-containing electrocatalyst and a first carbon support. The first carbon support supports the first platinum-containing electrocatalyst, and the electrochemical platinum surface area in the anode catalyst layer is 5-100 cm²Pt/cm² of the geometric electrode area of the anode catalyst layer. The cathode catalyst layer comprises a second electrocatalyst component and a second oxygen evolution reaction electrocatalyst. The second electrocatalyst component comprises a second platinum-containing electrocatalyst and a second carbon support, wherein the second carbon support supports the second platinum-containing electrocatalyst component.

The invention provides a corrugated board transfer trolley. According to the technical scheme of the invention, the corrugated board transfer trolley is characterized by comprising a chassis, wherein wheels are arranged below the chassis; a side baffle plate is fixed above the chassis; the chassis is provided with a movable feeding slope; one side opposite to the feeding slope is provided with a handrail; a fixing frame is arranged on the back side of the handrail; the fixing frame is fixed on the back side of the handrail through a fixing frame revolving shaft; the surface of the inner wall of a space defined by the chassis, the side baffle plate, the handrail and the feeding slope is glazed or provided with a ceramic surface layer. The corrugated board transfer trolley has the beneficial effects that the chassis and the side baffle plate are glazed, so that corrosion caused by oxidization of air is lowered; the fixing frame is designed, so that shaking of a trolley during feeding is reduced, single-person operation becomes possible, and a part of labor force is liberated.

The present invention provides a marine monitoring equipment corrosion protection device which comprises a monitoring device main body, the monitoring device main body is of a cylindrical structure, an anti-corrosion assembly is fixedly installed at the middle section position of the monitoring device main body, the anti-corrosion assembly comprises a fixed disc, and the fixed disc is close to the lower end position of the monitoring device main body. A rubber sleeve is fixedly installed at the upper end of the fixing disc, a fixing ring is fixedly connected to the upper end of the rubber sleeve, a circle of sliding groove is formed in the inner wall of the fixing ring, a threaded sleeve is fixedly installed at the position, close to the upper end, in the monitoring device body, and a threaded ring is in threaded connection with the outer portion of the threaded sleeve. A plurality of connecting shafts are fixedly connected to the exterior of the threaded ring, a limiting ring is fixedly connected to the other end of each connecting shaft, a rotating handle is fixedly connected to the upper end of the limiting ring, a circle of sliding rail is fixedly connected to the outer wall of the limiting ring, the sliding rail is matched with the sliding groove in size, and the sliding rail is movably connected to the interior of the sliding groove.

The invention relates to a switch cabinet which includes a cabinet door. The cabinet door is provided with a concave circular groove; the concave circular groove is internally provided with a handle; the cabinet door is provided with a circular handle baffle; one side of the circular handle baffle is installed on an edge of the circular groove through a pin, and can rotate with the pin as an origin; the other side of the circular handle baffle is provided with a protrusion; and a notch matching the protrusion is arranged at a corresponding position of the circular groove. When the switch cabinet is in use, the circular handle baffle is closed to cover the circular groove; the notch and the protrusion are cooperated so that the circular handle baffle and the circular groove are locked; through cooperation between the circular handle baffle and the circular groove, the handle is closed, so that the damage to the handle in the transportation project can be effectively avoided, and the oxidation corrosion of the handle is effectively reduced.

The invention relates to an embedded sealing ring machining technology, in particular to a machining tool and a machining method for an embedded sealing ring. The machining tool and the machining method for the embedded sealing ring are used for solving the problems that in the existing embedded sealing ring press-fitting technology, graphite is locally trimmed and even fractured, or the design requirement cannot be met due to the fact that the performance of a metal material is changed, and meanwhile, the surface oxidation corrosion of a metal ring seat is accelerated, so that the sealing reliability of the end face is reduced; and an existing axial clamping machining tool is insufficient in size precision and form and location tolerance precision, low in product percent of pass and poor in sealing reliability of the end face. The machining tool for the embedded sealing ring comprises a clamp base, an axial positioning device and a radial positioning device. The machining tool has the radial clearance compensation function and the axial positioning and clamping function, and the size precision and the form and location tolerance precision of the embedded sealing ring can be remarkably improved. Meanwhile, the invention further provides a machining method of the embedded sealing ring.

The invention provides a chemical plating protection method of a copper back plate water path, and belongs to the technical field of target material preparing. The chemical plating protection method of the copper back plate water path comprises the following steps that the copper back plate water path is subjected to oil removal treatment; a plating solution is led into the copper back plate water path obtained after oil removal treatment for the redox reaction; deposition is carried out on the surface of the copper back plate water path obtained after oil removal treatment to form a coating, and through cleaning and drying, the copper back plate water path protection coating is obtained; and the plating solution circularly flows and comprises silver salt, a reducing agent, a complexing agent, a surface tension conditioning agent, an organic solvent and water. According to the chemical plating protection method of the copper back plate water path, the silver coating can be rapidly prepared on the surface of the copper back plate water path, and the oxidation resistance and the cooling performance of the copper back plate can be improved.

The invention discloses novel shading awning cloth, and belongs to the technical field of shading cloth. An upper cloth layer is formed by interweaving the twisted yarns and the carbon fiber yarns; the twisted yarns are provided with stable air holes and have good air permeability and structural strength, so that the service life of the shading tarpaulin is prolonged. The adsorption filtering layer is a fiber medium layer composed of carbon nano tubes, nano-titanium dioxide and a fiber capturing medium, and the carbon nano tubes have a good adsorption filtering effect; nanoscale titanium dioxide contained in the adsorption filtering layer can shield ultraviolet rays well, the nanoscale titanium dioxide has a good reflection effect on the ultraviolet rays, meanwhile, the nanoscale titaniumdioxide can decompose impurities attached to the surface of the fiber capturing medium through photocatalysis of the nanoscale titanium dioxide, and the self-cleaning function of the shading awning cloth is achieved. Meta-aramid paper and a flame retardant in the fireproof flame-retardant layer are matched with each other to achieve a high-strength flame-retardant composite effect, so that the safety level of the shading tarpaulin used for automobile protection is improved.

The invention discloses an anti-oxidation protection mechanism for a data line connector in a humid environment, which comprises a data line connector shell, a metal connector is fixedly mounted at the right end of the data line connector shell, an external host is inserted into the right end of the metal connector, the data line connector shell is sleeved with a protective sleeve, and a drying ring is inserted into the right end of the protective sleeve. The drying ring is located at the joint of the protective sleeve and the external host. The right end of the drying ring is tightly attached to the external host, an iron sheet is fixedly installed at the left end of the drying ring, a magnet is arranged on the left side of the iron sheet, the magnet is fixedly installed in the right end of the protective sleeve, the iron sheet is attracted to the magnet, a push plate is arranged on the left side of the iron sheet, and the left end of the iron sheet is attached to the push plate. A connecting rod is fixedly installed at the left end of the push plate. When the anti-oxidation protection mechanism is used, a metal connector of a data line can be protected in a humid environment when the data line protection device is used or not used, oxidation corrosion of moisture in the environment to a metal flat cable is reduced, and therefore the service life of the data line is prolonged.

The invention relates to a novel cooling method and device applied to semi-continuous casting of magnesium alloy. The novel cooling method comprises the following steps: a, performing primary coolingon liquid magnesium for orderly condensation; and b, orderly pulling the condensed liquid magnesium downwards, and performing secondary cooling to form a casting blank. In the step b, a protective gasis adopted to perform secondary cooling and is cooled down. The novel cooling device comprises a crystallizer and a dummy bar head, wherein a secondary cooler for secondary cooling of a magnesium alloy casting blank is arranged below the crystallizer and provided with a secondary cooling gas cavity which surrounds the dummy bar head and allows the protective gas to be pumped therein. The novel cooling method and device have the following beneficial effects: since the protective gas is adopted to perform secondary cooling on the magnesium alloy casting blank, the casting blank is prevented from oxidation corrosion; the protective gas is cooled down, so that the magnesium alloy casting blank can be quickly cooled down; the quality of the magnesium alloy casting blank can be remarkably improved; and meanwhile, combustion and explosion accidents can be prevented.