29 results about "Aqueous corrosion" patented technology

The invention belongs to the technical field of gas field water flow meter measurement, and particularly discloses a two-phase flow measuring device and method resistant to oil and gas field water corrosion. The device is used for measuring gas field water in a pipeline and is matched with a flow totalizer. Comprising a first differential pressure flowmeter used for measuring the mass flow of gas in a pipeline, a second differential pressure flowmeter used for measuring the mass flow of liquid in the pipeline, a temperature sensor used for measuring the temperature of the gas in the pipeline, and a liquid level differential pressure transmitter used for measuring the liquid level in the pipeline. The temperature sensor, the first differential pressure flow meter, the second differential pressure flow meter and the liquid level differential pressure transmitter are respectively connected with the flow totalizer. According to the invention, the problems of gas and liquid two-phase flow measurement, accurate sulfur-containing gas field water measurement and the like can be solved under the condition that gas field water components contain corrosive (especially sulfur-containing components), non-full pipe flow and liquid phase flow velocity.

The application relates to the coating technical field and discloses a composite coating as well as a preparation method and application of the composite coating. The composite coating comprises an inner layer, an outer layer and a bonding layer arranged between the inner layer and the outer layer; the outer layer is a basalt fiber cloth; and the preparation raw materials of the inner layer comprise 100 parts by weight of a first epoxy resin, 10-40 parts by weight of chopped basalt fibers, 5-30 parts by weight of hexagonal boron nitride, 0.5-5 parts by weight of a coupling agent, 1-3 parts by weight of a surfactant, 0.5-2.5 parts by weight of an antioxidant and 1-15 parts by weight of a curing agent. The composite coating provided in the application can significantly enhance the bonding strength between the composite coating and a base body through the interaction between the various components, can avoid the falling-off of the composite coating, can significantly improve the acid resistance and halogen water corrosion resistance of the composite coating, and is suitable for industrial popularization.

The invention discloses marine atmosphere corrosion-resistant high-toughness steel and a preparation method thereof, and relates to the technical field of steel production, and the marine atmosphere corrosion-resistant high-toughness steel comprises the following chemical components in percentage by mass: 0.025-0.035% of C, 1.29-1.51% of Si, less than or equal to 0.010% of P, less than or equal to 0.0010% of S, 1.6-2.9% of Cr, 0.41-0.65% of Cu, 0.15-0.45% of Al and 0.95-2.25% of Ti. And the balance of Fe and inevitable impurities. The high-toughness steel resistant to marine atmosphere corrosion has good seawater corrosion resistance and marine organism corrosion resistance, the safety of sailors, ships, transported goods and marine ecology is guaranteed, and the service life of the whole steel structure engineering is prolonged.

The present application relates to a kind of copper anchoring silicon defect montmorillonite-based anticorrosive material preparation method, by trace hydrofluoric acid etching montmorillonite, peeling off interlayer silicon atom to manufacture surface vacancy, with inorganic montmorillonite as carrier, interlayer silicon vacancy anchors copper ion to capture conductive polymer, realize in montmorillonite interlayer stable in situ polymerization.Polymer-montmorillonite is used as filler, and montmorillonite-based composite anticorrosive coating is prepared by coating method.Adding layered montmorillonite in coating matrix not only can provide physical barrier, prevent water, corrosive ion in environment from diffusing into substrate, but also can make conductive polymer maintain good dispersibility and long-term service stability in coating matrix, play the role of electrochemical shielding, thereby avoid the possibility of electrochemical reaction between corrosive substance and substrate, increase the corrosion resistance of coating.Preparation method, process is simple, reaction condition is mild;Raw material and equipment are cheap and easy to obtain, low cost;Synthesis efficiency is high, suitable for large-scale production.

The application discloses a phosphide nanometer array catalyst for seawater hydrogen evolution and a preparation method and application thereof. The catalyst takes foamed nickel as a carrier to provide support and conductive effect for the catalyst; the catalyst is composed of a composite material of nickel, molybdenum, phosphorus and cobalt, and a nanorod array structure of the catalyst main body is formed on the base. The cobalt-doped nickel molybdenum phosphide nanorod array catalyst provides high active sites, the phosphide layer is in-situ oxidized into an active phase of Ni(OH)2 to accelerate reaction kinetics, and granular phosphide (P-Metal bond) on the surface of the nanorod blocks Cl ‑ erosion, and a three-dimensional porous structure promotes bubble detachment to resist seawater corrosion; the catalyst can simultaneously serve as a cathode (HER) and an anode (OER) to realize dual-function integration, realizes full-hydrolysis voltage ≤1.60 V (10 mA cm ‑2 ) in 1 M KOH solution, and stably operates for ≥88 h (current density attenuation rate ≤10%) under a cell voltage of 1.90 V.

The invention belongs to the field of nuclear materials, and particularly relates to a nuclear fuel and a preparation method thereof and a reactor, the nuclear fuel comprises a nitride matrix and an MAX phase material distributed in the nitride matrix; the chemical formula of the MAX phase material is Mn + 1AXn, M is selected from at least one of Ti and Cr, A is selected from at least one of Si and Al, X is selected from C, and n is 1 or 2. According to the nuclear fuel disclosed by the invention, the MAX phase material is introduced into the nitride matrix, and a corrosion-resistant oxide layer is generated in situ by utilizing the MAX phase material to block water permeation, so that the nuclear fuel has the properties of high thermal conductivity, relatively strong water corrosion resistance, steam oxidation resistance and radiation resistance, and can be applied to a light water reactor; the application risk of the existing uranium nitride fuel in the light-water reactor is reduced, and the safety and economy of the reactor are improved.

The utility model discloses an automatic stainless steel plate machining device which comprises a machining table, electric sliding rails are symmetrically and fixedly installed on the two sides of the machining table, rail blocks are connected to the outer ends of the two electric sliding rails in a sliding mode, a blower is fixedly installed at the top of one rail block, and a motor is fixedly installed at the top of the other rail block. An electric heater is fixedly installed on one side of the air blower, protective nets are symmetrically and fixedly installed on one side of the electric heater, and a spraying assembly is arranged on the top of the other rail block. According to the scheme, the electric sliding rail, the rail block, the air blower, the electric heater and the protective net are arranged, the electric sliding rail and the rail block are matched to adjust the position of the air blower, the electric heater can heat air sucked by the air blower, the protective net blows the air to the surface of a stainless steel plate, and water of a cleaning acid solution on the surface of the stainless steel plate is conveniently dried; and hands of workers are prevented from being corroded by residual water of the cleaning acid solution on the surface of the stainless steel plate during unloading, and the workers are protected conveniently.

The invention provides a seawater corrosion fatigue test system and method.The seawater corrosion fatigue test system comprises an upper fixing base, a lower fixing base and a salt bath assembly, the upper end and the lower end of a to-be-tested workpiece are clamped by the upper fixing base and the lower fixing base, the salt bath assembly is arranged between the upper fixing base and the lower fixing base, a salt bath solution is injected into the salt bath assembly, and the to-be-tested workpiece is placed in the salt bath assembly; and the workpiece to be detected passes through the salt bath solution of the salt bath assembly. According to the seawater corrosion fatigue test system and method provided by the invention, the salt bath barrel is additionally arranged between the two fixed seats, and the to-be-tested workpiece and the salt bath barrel are elastically sealed in a multi-sealing manner, so that the sealing problem caused by vibration deformation of the to-be-tested workpiece under a fatigue test condition can be solved; the salt bath solution environment is applied to the to-be-tested workpiece, but the fatigue test of the to-be-tested workpiece is not influenced, so that the fatigue test of the to-be-tested workpiece in the salt bath environment is realized, and a fatigue test result under a seawater condition can be obtained.

The application relates to the field of low-temperature seawater corrosion tests, in particular to a seawater-ice crystal two-phase flow rotating scouring corrosion test device. A low-temperature condensate water pipe is arranged on the periphery of an ice storage water mixture container, an ice storage screen cylinder is arranged in the inner cavity of the ice storage water mixture container, and a transmission shaft extends into the inner cavity of the ice storage screen cylinder in the vertical direction; a rotating disc is arranged at the lower end of the transmission shaft, a horizontal bottom tray is arranged at the bottom of the rotating disc, and the rotating disc and the bottom tray are connected through a working electrode; a transmission gear one and a brush slip ring are arranged on the upper part of the transmission shaft, the transmission gear one is fixedly connected with the transmission shaft, and the brush slip ring is tightly connected with the transmission shaft; one end of an electrochemical test lead is connected with the working electrode, the other end of the electrochemical test lead extends into the inner hole of the transmission shaft and is connected with the transmission shaft, and the brush slip ring is connected with an electrochemical test system and the electrochemical test lead respectively. The temperature control operation of the ice storage water mixture container is convenient, and low-temperature seawater simulation test can be realized.

The invention belongs to the technical field of nuclear fuel development, and particularly relates to a preparation method of a large-grain UO2 fuel pellet. The preparation method comprises the following steps: (1) uniformly mixing a grain growth substance and an acid-deficient uranyl nitrate solution, adding saturated ammonium carbonate or introducing reaction gas for precipitation reaction to generate an AUC precipitate; the reaction gas is a mixture of NH3 and CO2; (2) filtering the AUC precipitate to obtain a filter cake, and washing, filtering, drying and calcining to obtain powder; (3) granulating the powder, and forming to obtain a green fuel pellet; and (4) sintering the green fuel pellet to obtain the large-grain UO2 fuel pellet. The average grain size of the prepared large-grain UO2 fuel pellet is larger than or equal to 40 micrometers, and the large-grain UO2 fuel pellet has the high melting point, good water corrosion performance and irradiation stability of traditional UO2 fuel and further has the low fission gas release rate and the high heat conductivity.

The utility model relates to a cabinet and an energy storage system, and belongs to the technical field of energy storage. The cabinet body is provided with a cabinet top face, and a sinking groove penetrating through the cabinet top face is formed in the side, located on the cabinet top face, of the cabinet body. The hoisting unit is embedded in the sinking groove and comprises a base body and a plurality of hoisting parts arranged on the base body, the base body is fixedly connected with the cabinet body, a drainage flow channel is formed in a groove opening, facing the sinking groove, of the base body, the hoisting parts are distributed in the drainage flow channel, and the cabinet body is provided with a drainage port communicated with the drainage flow channel. The hoisting unit can be prevented from being repeatedly disassembled, assembled and installed, the occupation of the hoisting unit on the cabinet body placement space is reduced, the cabinet body hoisting efficiency is improved, and the problem that the cabinet body and the hoisting unit are corroded by accumulated water is solved.

The invention discloses a deep sea gate valve parameter optimization and performance detection method based on multi-physics field coupling, and relates to the field of gate valve health management, and the method comprises the steps: building a multi-physics field coupling model comprising a deep sea pressure field, an ocean current impact flow field, a seawater corrosion chemical field and a structural mechanics field; for the multi-physics field coupling model, inputting deep sea related parameters, namely valve body related parameters, performing optimization design on a valve body structure, a sealing assembly, a valve rod structure and a valve core shape of the gate valve, and determining a value combination of each parameter to generate a plurality of groups of candidate parameter schemes; according to the method, a multi-physics field coupling model covering deep sea pressure, ocean current impact, seawater corrosion and structural mechanics is established, the comprehensive effect of the deep sea complex environment on the gate valve can be accurately mapped, and a multi-performance index weight optimization function is combined with constraint conditions by inputting key parameters; scientific design of key parameters of the valve body, the sealing assembly, the valve rod and the valve element is achieved.

This invention provides an experimental method for simulating high-pressure seawater corrosion inside pipes. The apparatus includes a seawater circulation system and a temperature control system. The seawater circulation system includes a seawater tank. Seawater in the tank is partially driven by a centrifugal pump through an isolation valve and returns to the seawater tank via a bypass valve to mix the seawater inside. The remaining seawater passes through a main line resistance regulating valve and enters a branch test pipeline. In the branch test pipeline, the seawater sequentially passes through a branch line resistance regulating valve, a branch flow meter, and the test tank before converging into the main line return water pipeline and flowing back to the seawater tank via a return water resistance regulating valve. The seawater tank is connected to a pressure control device. This experimental apparatus simulates the corrosion of pipes in a deep-sea environment. Long-term simulation and observation of corrosion behavior are achieved through this apparatus, enabling precise temperature control over a wide temperature range. It can simulate the temperature difference environment inside and outside the pipe, reproducing the corrosion conditions under real heat exchange conditions.

In the field of lure technology, we provide lures that are manufactured using ceramic craftsmanship. [Solution] The fish-shaped object comprises a integrally molded ceramic fish-shaped body 1, and the surface of the ceramic fish-shaped body is covered with a glazed protective layer 2 having a biomimetic pattern structure. The ceramic material of the fish-shaped body has superior chemical stability compared to metal and plastic, effectively suppressing seawater corrosion and physical abrasion, and maintaining the integrity of the painted color even after long-term use. The biomimetic pattern structure is designed using various methods such as batch transfer decals and hand-painting, and after firing, the glazed protective layer is formed, enabling functions such as scale pattern imitation, fluorescence effect, and reflective treatment. The glaze on the surface mimics the shimmer of fish scales under different lighting conditions, enhancing its attractive effect to carnivorous fish.

The utility model provides a reinforcing system for preventing an anchor rod and an anchor cable from being corroded by sulphide ore leaching water, which comprises an unstable side slope, an anchor hole is arranged on the unstable side slope, the anchor rod is arranged in the anchor hole, and concrete is grouted between the anchor hole and the anchor rod; an anti-flushing concrete boss used for protecting the anchor rod is arranged on the slope surface of the unstable slope, an anti-flushing water stop belt is arranged on the upper portion of the anti-flushing concrete boss, one end of the anti-flushing water stop belt is located in the anti-flushing concrete boss, and the other end of the anti-flushing water stop belt is located outside the anchor rod. According to the reinforcing system, corrosion and aging of sulfide ore leaching water on the unstable side slope of the sulfide ore mine to the anchor rods and the anchor cables can be avoided to the maximum extent, the service life of the anchor rods and the service life of the anchor cables are prolonged, and the technical problem that in the prior art, the anchor rods and the anchor cables on the unstable side slope of the sulfide ore mine are corroded by the sulfide ore leaching water is solved. If the active protective net is damaged, original anchor rods and anchor cables can be used for binding and reinforcing, and the utilization rate of the original anchor rods and anchor cables is increased.

The invention belongs to the field of stainless steel welded pipe production, and particularly discloses a manufacturing process of a duplex stainless steel welded pipe for ocean engineering, which is characterized in that the spot corrosion performance of a finished product welded pipe reaches the advanced level of international similar products by controlling the welding speed, the welding current, the welding voltage and the welding gas; the method puts forward higher requirements on the welding heat input quantity and the welding gas, and a final spot corrosion test (corrosion data is less than 1g / m < 2 >, and no spot corrosion is found under 20 times) is carried out. The duplex stainless steel welded pipe for ocean engineering meets the working condition requirements of sea water corrosion, and is also suitable for stainless steel welded pipes with different specifications.

The application relates to the technical field of cables, and discloses a waterproof and corrosion-resistant bus cable and a preparation method.The polyethylene, PET copolyester, dicumyl peroxide and the like are mixed, extruded through a screw extruder, and granulated to obtain a sheath material layer.The compatibility and interface bonding performance of the PET copolyester and the polyethylene are good, which is beneficial to improving the mechanical properties of the PET / PE composite sheath material layer and the cable, the PET copolyester and the PE are chemically crosslinked, the crosslinking degree of the molecular chains is increased, the heat resistance is improved, and the entry of corrosion media such as water and salt into the composite sheath material layer is inhibited, which is beneficial to improving the high-temperature salt water corrosion resistance of the sheath material layer and the cable, and the prepared bus cable, submarine cable and the like have better practical application in a high-salt and high-humidity environment.

The utility model provides an anti-corrosion catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank, which relates to the technical field of protection of the inner wall of the hydrogen peroxide vacuum flash tank and comprises a hydrogen peroxide vacuum flash tank body, a tank wall lining layer is arranged at the inner side end of the hydrogen peroxide vacuum flash tank body, and the inner wall of the tank wall lining layer is provided with an anti-corrosion catalytic protective layer. An anti-corrosion lining surface layer is arranged on the outer surface of the tank wall lining layer, a polyketone resin lining interlayer is tightly attached to the inner side of the anti-corrosion lining surface layer through a PVDF polymerization layer, the inner side face of the polyketone resin lining interlayer is seamlessly connected with an anti-corrosion lining layer, and the anti-corrosion lining layer comprises a stainless steel layer and a corrosion inhibition blocking layer. The utility model solves the problem that the stainless steel single-layer inner wall of the existing vacuum flash tank is difficult to resist the corrosion of evaporated and concentrated high-concentration hydrogen peroxide for a long time.

The invention relates to the technical field of cables, and discloses a waterproof and corrosion-resistant bus cable and a preparation method thereof. The preparation method comprises the following steps: mixing polyethylene, PET copolyester, dicumyl peroxide and the like, extruding through a screw extruder, and granulating to obtain a sheath material layer; the compatibility and interface bonding performance of PET copolyester and polyethylene become better, the mechanical properties of the PET / PE composite sheath material layer and the cable are improved, after chemical crosslinking of PET copolyester and PE, the crosslinking degree of molecular chains becomes larger, the heat resistance becomes better, corrosion media such as water and salt are inhibited from entering the composite sheath material layer, and the service life of the cable is prolonged. The high-temperature salt water corrosion resistance of the sheath material layer and the cable is improved, and the prepared confluence cable, submarine cable and the like have better practical application in a high-salt and high-humidity environment.

A method of inhibiting corrosion of a metal surface in contact with an aqueous medium is provided. The method may include contacting the metal surface with a corrosion inhibitor composition where the corrosion inhibitor composition may include a compound or salt thereof of formula (I). The disclosed corrosion inhibitor composition is especially useful for inhibiting corrosion in closed loop systems.

The invention discloses a method and system for detecting the motion state of an actuating mechanism in an underwater unmanned underwater vehicle cabin in the technical field of computer vision measurement, and the method employs a vision system to carry out the non-contact measurement of the motion state of the actuating mechanism, thereby avoiding the problems of mechanical wear, brine corrosion, electromagnetic interference and the like. Structure simplification and reliability improvement are facilitated; and performing global feature fusion processing on the first image by using a first deep learning model so that each pixel point in the first image is fused with a global context feature, and performing identification and tracking on a first mark point on the motion part of the execution mechanism by using a second deep learning model. According to the space-time motion trail sequence of the first mark point and the second coordinate information of the first mark point in the cabin global coordinate system, the motion state of the execution mechanism can be determined, the requirement for real-time monitoring is met, meanwhile, environmental interferences such as underwater low illumination, turbidity and refraction are overcome, and the detection precision and reliability are improved.

A method of inhibiting corrosion of a metal surface in contact with an aqueous medium is provided. The method may include contacting the metal surface with a corrosion inhibitor composition where the corrosion inhibitor composition may include a compound or salt thereof of formula (I). The disclosed corrosion inhibitor composition is especially useful for inhibiting corrosion in closed loop systems.

The utility model relates to a cooling fan. The cooling fan comprises a machine body and a fan cover, wherein an air outlet is formed in the machine body; the air supply assembly is arranged in the machine body and used for conveying air flow to the air outlet; the water supply assembly is used for conveying water to the air flow, and the water supply assembly comprises a water tank made of a light-transmitting material; the photoelectric sensor is arranged on the outer side of the water tank and used for detecting the height of the water level in the water tank; the controller is in communication connection with the photoelectric sensor and the water supply assembly so that the water supply assembly can be controlled to be opened and closed on the basis of the water level height measured by the photoelectric sensor. According to the cooling fan, the photoelectric sensor is arranged on the outer side of the water tank to measure the height of the water level and does not make contact with water, water corrosion is avoided, and the service life is prolonged.

This invention relates to the field of diamond abrasive technology and discloses a method for preparing diamond abrasives with a microcrystalline glass bond resistant to pure water corrosion. The method involves surface activation pretreatment of diamond micropowder to obtain activated diamond micropowder; coating the activated diamond micropowder with amorphous silica to obtain pretreated diamond micropowder; uniformly mixing the microcrystalline glass bond, pretreated diamond micropowder, and binder, followed by pressing to obtain a molded blank; and then subjecting the molded blank to gradient sintering to obtain the microcrystalline glass bonded diamond abrasive. The microcrystalline glass bond of this invention is an alkali-free formulation, which effectively improves the water and acid resistance of the composite material. Through reasonable component formulation, a high degree of compatibility with the thermal expansion coefficient of diamond is achieved, enhancing the dimensional and thermal stability of the grinding wheel during the grinding process.

The application discloses a control method of a drawer type dish washing machine, the drawer type dish washing machine comprising a shell, an inner container, a cover plate, a pull plate, a pull rod, a sliding groove, a reset device, a driving device and a controller, the controller and the driving device being electrically connected, the control method comprising the following steps: S1, judging whether a washing program is paused or ended, if yes, entering step S2, if not, repeating step S1; S2, controlling the cover plate to shake; S3, judging whether the shaking times of the cover plate reach a preset number, if yes, entering step S4, if not, returning to step S2; S4, controlling the driving device to stop working; the control method can solve the problems of mis-triggering of an overflow protection fault alarm and corrosion and rust of a bottom plate caused by water to a certain extent.

The utility model discloses a kind of gate opening and closing device based on planetary reduction motor and linear pull rod, including gate frame and gate, it is characterized by: still include the linear pull rod driven by planetary reduction motor in outer box and being arranged on gate frame, the linear pull rod includes the fixed section of internally equipped screw rod, and the telescopic section that can be moved in fixed section and is connected with gate, the screw rod top end connects motor output end, and its bottom end and the nut in telescopic section constitute screw pair, realize the linear motion of telescopic section by planetary reduction motor drive screw rod rotation.The utility model in screw rod, nut is completely hidden in linear pull rod interior, compared with the exposed screw rod of traditional opening and closing machine, reduce dust and water vapor erosion, simultaneously, screw rod length shortens, and is nested in linear pull rod interior, improve bending resistance, also avoid transmission jamming caused by water corrosion, silt accumulation, can extend maintenance cycle.

The invention discloses a multi-protection material for a seabed sensor, belongs to the technical field of composite functional materials and ocean sensing, is mainly used for monitoring scouring of offshore wind power pile foundations, and can also be expanded to other seabed monitoring scenes. Aiming at the pain points that a traditional material is high in rigidity and poor in toughness, metal is easy to corrode and heavy, a carrier and a piezoelectric unit interface are weak in bonding and easy to strip and the like, the material adopts a structure customization design, reinforced fiber-epoxy resin is used as a matrix, a polyaniline coating is coated outside the matrix, a three-layer composite protection structure is constructed, and the material is adaptive to a complex seabed environment with high salt, high pressure and biological attachment. The composite material carrier integrates rigidity and toughness, reduces self weight, improves interface compatibility and bonding strength with a BTO / PVDF piezoelectric unit, inhibits seawater corrosion and biological fouling, prolongs the service life of a sensor, can support the PVDF unit to realize'scouring sensing-energy self-sufficiency 'integration, and provides a high-adaptability and high-reliability composite material carrier scheme for underwater structure scouring monitoring.

An internal cooling water quality regulation control device of a generator is characterized in that an inlet of an inlet filter is communicated with an internal cooling water outlet main pipe of an internal cooling water cooler of the generator through a pipeline, an outlet of the inlet filter is communicated with an inlet of a weakly alkaline ion exchanger through a pipeline, and an outlet of the weakly alkaline ion exchanger is communicated with an inlet of a precision filter through a pipeline; an outlet of the precision filter is communicated with an inlet of the outlet filter through a pipeline, an outlet of the outlet filter is communicated with the inner cold water tank through a pipeline, and the automatic micro-alkali adjusting device is communicated with an outlet of the weak-alkali ion exchanger through a pipeline; by reducing the conductivity of an internal cooling water system and improving the pH value, the corrosion of internal cooling water is reduced, the corrosion of a hollow copper wire rod is reduced, the safety of a generator set is improved, the conductivity and pH of the internal cooling water can be effectively controlled, corrosion products of the system and pollutants brought by the outside can be removed, and the device is an efficient and environment-friendly treatment system.

The application discloses a deep-sea gate valve parameter optimization and performance detection method based on multi-physical field coupling and relates to the field of gate valve health management, and comprises the following steps: a multi-physical field coupling model comprising a deep-sea pressure field, an ocean current impact flow field, a seawater corrosion chemical field and a structural mechanics field is established; the multi-physical field coupling model is inputted with deep-sea related parameters, i.e., valve body related parameters, the valve body structure, the sealing assembly, the valve rod structure and the valve core shape of the gate valve are optimized and designed, and the value combination of each parameter is determined to generate several groups of candidate parameter schemes; and the multi-physical field coupling model covering the deep-sea pressure, the ocean current impact, the seawater corrosion and the structural mechanics is established, the comprehensive action of the deep-sea complex environment on the gate valve can be accurately mapped, the key parameters are inputted, the multi-performance index weight optimization function is combined with the constraint condition, and the scientific design of the key parameters of the valve body, the sealing assembly, the valve rod and the valve core can be realized.