180results about How to "Improve seawater corrosion resistance" patented technology

The invention discloses a surface anti-oxidation processing method for an aircraft carbon brake disc, which comprises the following steps: firstly, coating a layer of phosphate coating solution on the surface of a material needing to be processed, and forming a bottom phosphate coating through high temperature heat treatment; secondly, coating a layer of slurry coating which uses refractory ceramic powders as the main raw material and uses the phosphate coating solution as solution on the surface of the bottom phosphate coating; and finally forming a composite coating through the high temperature heat treatment. The composite coating of the invention has anticatalytic effect, and can improve the high temperature anti-oxidation capacity of C/C composite materials, such as the aircraft carbon brake disc and the like, under the condition of sea or salt spray pollution; and the ceramic component in the composite coating is melted and flows at high temperature so as to effectively heal the crackles in the coating, delay the time that oxygen is contacted with C/C materials, and improve the oxidation resistance of the composite coating.

The invention relates to a method for treating the surface of seawater corrosion resistant metallic aluminum or aluminum alloy. The method comprises the following steps: 1) sand pellets are used to carry out gritting blasting treatment for the surfaces of aluminum and aluminium alloy through a spray gun so as to bring about the concave and convex surface topography in the micron order for aluminium and aluminium alloy; 2 the aluminium and aluminium alloy is cleaned after degreasing and is taken as the anode of an electrolytic bath, and nickel is taken as a cathode; the electrolyte is prepared and is added into the electrolytic bath, and a DC power supply is connected with the anode and the cathode so as to form nanometer holes on the aluminium or aluminium alloy surface; and 3 silicon fluoride is taken to carry out the surface finish of aluminum or aluminium alloy so as to reduce the surface free energy of aluminium or aluminium alloy. The method for adopting silicone fluoride to carry out the surface finish of aluminum or aluminium alloy comprises the following steps: heating up the aluminium or aluminium alloy processed in step 2 to 90 to 120 DEG C, keeping the temperature for 30 to 40 minutes, taking the aluminium or aluminum alloy out and cooling down the aluminium or aluminum alloy to a room temperature, and then carrying out surface finish through a soak method or a vapor plating method. The processed aluminium metal or aluminum alloy has good resistance to seawater corrosion.

the invention discloses a marine exploiting platform steel of erosion property of sea water resistance, which comprises the following parts: 0.03-0.09% C, 0.90-1.60% Mn, 0.10-0.50% Si, 0.006-0.020% P, 0.004-0.100% Cr, 0.02-0.40% Cu, 0.010-0.060% Als, 0.005-0.060% Nb, 0.005-0.030% Ti, Fe and impurity. the manufacturing method comprises the following steps: desulfurizing; blowing; disposing through vacuum; casting continually; rolling.

The invention relates to a high elastic corrosion resistant epoxy sealant and a preparation method thereof. The epoxy sealant provided by the invention comprises a component A and a component B in a weight ratio of 100:20-100:25. The epoxy sealant provided by the invention has advantages of high strength, high elasticity, low heat release, cracking resistance, good sealing performance and seawater corrosion resistance, is convenient for construction, and greatly improves sealing of key parts of ship stern tube.

The invention provides a seawater corrosion resistant submerged arc welding wire rod and a welding wire thereof. Both the wire rod and the welding wire comprises the following elements (according to the weight percent): C is equal to or less than 0.12, Si is equal to or less than 0.3, Mn is 1.0 to 1.8, S is equal to or less than 0.020, P is equal to or less than 0.020, Cr is 0.60 to 1.50, Ni is 0.15 to 0.50, Mo is 0.10 to 0.30, Cu is 0.05 to 0.30, Ti is 0.01 to 0.08, B is equal to or less than 0.005, Al is equal to or less than 0.030, and the rest is Fe and inevitable impurity elements. The invention also provides the application of the welding wire to the submerged arc welding wire matched with the seawater corrosion resistant steel Q345C-NHY3. The deposited metal of the welding wire provided by the invention has the advantages of excellent dynamic performance, welding performance and seawater corrosion resistant performance, which can be used for welding the seawater corrosion resistant steel. The welding wire rod and the welding wire of the invention are applicable to the structure with high corrosion resistance requirement in the immersion zone and the splash zone of the sea.

The invention discloses a high-strength steel bar with high corrosion resistance. The high-strength steel bar comprises the components of C, Si, Mn, P, S, Cr, Ni, Al, Cu, Mo, Ti and Fe. The invention further provides a preparation method of the high-strength steel bar with high corrosion resistance. The steel bar is stable in performance, has excellent corrosion resistance and high mechanical property, and can be widely applied to building engineering of coast and salt lake areas.

An aluminum alloy for use in a plate-fin heat exchanger having a heat transfer portion with seawater as a coolant includes an organic phosphonic acid underlying coating disposed on the surface of the aluminum alloy and a fluorocarbon resin coating disposed on the organic phosphonic acid underlying coating, the fluorocarbon resin coating having an average thickness of 1 to 100 μm after drying. The aluminum alloy has improved durability of coating adhesion and excellent seawater corrosion resistance.

The invention relates to a whitening ultraviolet-proof double-shield instrument cable for ships and a manufacturing method thereof. The cable is characterized in that a whitening ultraviolet-proof ethylene-propylene rubber insulation layer is extruded at the periphery of a tin-plated annealed stranded copper conductor to form an insulation wire core; every two insulation wire cores are twisted to form twisted wire pairs; each twisted wire pair is wrapped with a wire core copper foil polyester composite tape shielding layer at the periphery; the wire core copper foil polyester composite tape shielding layers are each wrapped with a wire core polyester tape at the periphery to form a pair-twist group; all the pair-twist groups are stranded to the right at 16-24 times of stranding lay ratio to form a cable core; the cable core is wrapped with a cable core copper foil polyester composite tape shielding layer at the periphery; the cable core copper foil polyester composite tape shielding layer is wrapped with a cable core polyester tape at the periphery; an inner sheath is extruded at the periphery of the cable core polyester tape; the inner sheath is coated with a copper alloy wire weaving armor layer at the periphery; and an outer sheath is extruded at the periphery of the copper alloy wire weaving armor layer. The insulation layer of the double-shield cable is white in color, good in mechanical property, excellent in anti-ultraviolet irradiation and anti-aging performance, and long in service life.

The invention provides an epoxy powder primer used for anticorrosion paint for outer walls of deep sea oil transportation steel pipes and a preparing method thereof. The epoxy powder primer comprises following raw materials by mass: 40-50 parts of E-12 epoxy resin, 10-25 parts of linear phenolic epoxy resin, 25-45 parts of a filler, 9-15 parts of a curing agent, 0.1-1 part of an antioxidant, 0.2-1 part of a coupling agent, 0.9-1.8 parts of benzoate, 0.3-1 part of a levelling agent, 1-3 parts of graphene, 1-2 parts of polyvinyl butyral, 3-5 parts of modified polytetrafluoroethylene wax micropowder, 0.2-0.4 part of rare earth chloride and 1-3 parts of pigment. The epoxy powder primer has excellent wear resistance, resistance to pressure, bending resistance and impact resistance, is excellent in adhesion force and fraction of coverage for steel pipes, and can effectively protect the steel pipes from being corroded by various corrosive media in sea water for a long term.

The invention relates to an aluminum alloy tube resistant to seawater corrosion, in particular to an aluminum alloy tube with high seawater corrosion resistance. The aluminum alloy tube is manufactured from magnesium, aluminum and other raw materials through the steps of: melting, stirring, in-furnace modification treatment, impurity removal, fining treatment, online argon refining, purification treatment, casting, homogenization treatment, extrusion, cold drawing and the like. The aluminum alloy tube has the advantages of good seawater corrosion resistance and long service life, is particularly suitable for equipment for low-temperature multi-effect seawater distillation and seawater desalination treatment.

The invention discloses a manufacturing method of a deep sea watertight electric connector, and belongs to the technical field of underwater cable connecting equipment. The manufacturing method solves the problems that in the prior art, due to the fact that an O-type ring can be easily dropped in the using process of a traditional watertight electric connector, sealing is incomplete, water seepage is easily caused, and the traditional watertight electric connector cannot be used in the underwater severe environment. The manufacturing method mainly comprises the steps of manufacturing a plug, manufacturing a socket and assembling the plug and the socket. The deep sea watertight electric connector is mainly used in underwater cameras, underwater lamps, underwater robots, nuclear power station pool underwater lamps for lighting and underwater sensors.

The present invention relates to anti-oxidant coating for plane carbon/carbon brake disc and the preparation method. In the preparation of the anti-oxidant coating for plane carbon/carbon brake disc, distilled water is used as solvent; phosphoric acid, phosphate and boron oxide are used as main components; the coating solution can be formed after stirring uniformly. The coating solution is uniformly painted on the part of the surface of a carbon brake disc to be painted in a brushing or spraying method. A layer of coating of thickness of about 50 Mu m to 300 Mu m can be formed after high-temperature solidification. The coating prepared in the method of the present invention has a dense surface, no crack or holes or other defects. The bonding performance between the coating and the carbon / carbon matrix is good. The coating has the characteristics of excellent performances of oxidation protection, and hot-wet, seawater-resistant, or smog-resistant oxide protection. The coating is suitable for the manufacture of plane carbon/carbon brake disc and the anti-oxidation treatment in repair.

The invention relates to low alloy wearing resistance corrosion resistance steel which is suitably used in the ocean mud-sand wearing and corrosive environment, which is produced by the following steps: Mn-Si-Cr-Mo system non-carbide bainite alloy steel is taken as research basis, the carbon content and other alloy element contents are properly adjusted, elements of Al, Nb and rare earth contributing to improving the corrosion resistance of the alloy steel are added for modification, and the Mn-Si-Cr-Mo-Al system non-carbide bainite steel is formed by the progression quenching heat treatment process, so that the low alloy wearing resistance corrosion resistance steel is obtained. The steel has good obdurability, wearing resistant and corrosion resistant comprehensive performance and welding repair performances, and can be used to solve the problem of repairing worn blades of a centrifugal pump of a ship, and can also be applied to other ocean wearing resistance welding parts.

The invention discloses anti-corrosion steel for a bridge tubular pile. The anti-corrosion steel comprises the following components in percentage by weight: 0.07-0.13% of C, 0.30-0.65% of Si, 0.80-1.30% of Mn, 0.025-0.045% of P, less than or equal to 0.002% of S, not greater than 0.006% of Al, 0.035-0.050% of V, 0.008-0.025% of Ti, 0.005-0.02% of Re, 0.006-0.012% of Zr and 15-30ppm of dissolved [O]. A production method of the anti-corrosion steel comprises the following steps: performing converter smelting and continuous casting to obtain a blank; performing stack cooling on the casting blank; heating the casting blank; performing sectional rolling; performing conventional laminar cooling; coiling; and performing air cooling to room temperature. According to the anti-corrosion steel disclosed by the invention, the yield strength is greater than or equal to 390MPa, the tensile strength is greater than or equal to 510MPa, the elongation A is greater than or equal to 21%, the impact energy Akv at 0 DEG C is greater than or equal to 47J, the corrosion resistance is equivalent to that of the American Corten B steel, the thickness specification of a steel plate is 20-25mm, the production cost is low, and the large-scale production requirement is met; moreover, a straight welding pipe is replaced to manufacture the bridge steel tubular pile, the production efficiency can be remarkably improved, and the production cost of the steel tubular pile is lowered.

The invention provides 400 MPa-level tungstenic corrosion-resistant twisted steel and a preparation method thereof. The twisted steel comprises the following components (wt%): 0.03%-0.05% of C, 0.3-0.6% of Si, 0.6-1.2% of Mn, smaller than or equal to 0.01% of P, smaller than or equal to 0.01% of S, 8.0-10.0% of Cr, 1.0-2.0% of W, one or a composition of 0.04-0.10% of V and 0.01-0.05% of RE and the balance of Fe and unavoidable impurities, wherein C, Si, Mn, P, S, Cr and W are basal components; and V and RE are optional components. The 400 MPa-level tungstenic corrosion-resistant twisted steel has the advantages that seawater corrosion resistance of the steel is improved by more than 4 times than that of common twisted steel, the performance is stable, structure mainly comprises ferrite and bainite, good strength and plasticity are ensured, and the 400 MPa-level tungstenic corrosion-resistant twisted steel can be widely applied to a reinforced concrete building structure in a marine environment.

The invention relates to a two-core photovoltaic composite submarine cable with a rated voltage of 220 kV. The cable comprises a cable core and sheaths. The cable core consists of power control wire cores, a communication wire core, and a filling rope. The power control wire cores include conductors including copper wires and aluminium wires arranged at the centers of the conductors; the copper wires are arranged among the aluminium wires; conductor shielding layers are arranged outside the conductors; insulating layers are arranged outside the shielding layers; and water-blocking tapes are arranged outside the insulating layers. The communication wire core is arranged around the power control wire cores. A buffer layer, a lead sleeve, a non-metallic sheath, an anti-corrosion layer, an armored armor layer, an armored outer protection layer, and a lead alloy sheath are arranged outside the cable core successively. The provided cable has advantages of excellent anti-water-seepage, sea water-resistant, external water pressure-resistant, voltage thermal shock-resistant, and strain bending performances, long service life, and high reliability; and the effective usage rate of the power is improved; and the area occupation rate of the sea area is reduced.

An aluminium alloy material having an excellent sea water corrosion resistance comprises an aluminium alloy substrate whose ten-points average surface roughness Rz, which is the average of five greatest peak-to-valley separations on the surface, is controlled at 0.3 um or over, an organic phosphonic primer film formed on a surface of the aluminium alloy substrate, and a fluorine resin paint film formed on the primer film and having a dry average thickness of 1 to 100 μm. A plate heat exchanger having an excellent sea water corrosion resistance is also provided wherein the aluminium alloy material is used as a heat transfer unit using sea water as cooling water.

The invention discloses a novel low-cost high-plasticity sea-water-corrosion-resistant titanium alloy, belonging to the technical field of a new titanium alloy. The novel low-cost high-plasticity sea-water-corrosion-resistant titanium alloy comprises the following elements by weight: 3.0-4.5% of Al, 2.0-3.0% of V, 0.5-1.5% of Fe, 0.5-2.0% of Cu and balance of Ti and impurity elements. Compared with Ti-6Al-4V alloy, the characteristics of the new alloy are as follows: (1) the raw materials are low in cost, hot workability plasticity is good, yield is high, and low is significantly reduced; (2) room temperature tensile strength of the new alloy after annealing is equal to that of the Ti-6Al-4V alloy, room temperature plasticity is higher, and the new titanium alloy is suitable for cold processing and warm processing forming of plates and pipes; and (3) corrosion resistance in seawater of the alloy is further improved. The titanium alloy is suitable for producing titanium alloy products such as rods, wires, plates, pipes,and the like, and can be widely used in the technical fields of aviation, spaceflight, ocean, and the like.