196 results about "Marine corrosion" patented technology

The invention discloses a novel environment-friendly coating with superhigh marine environment corrosion resistance and a preparation method and application thereof. The environment-friendly coating with superhigh marine corrosion resistance consists of the following components in part by weight: a main agent comprising 22 to 35 parts of low-viscosity solvent-free epoxy resin, 9 to 15 parts of activated thinner, 0.2 to 5 parts of aid, 5 to 8 parts of organic solvent, 0.5 to 15 parts of toner, 10 to 25 parts of first filler, 20 to 45 parts of second filler and 0.5 to 5 parts of thixotropic agent, and a curing agent comprising 60 to 90 parts of amine resin, 10 to 30 parts of activated thinner, 2 to 8 parts of aid and 2 to 10 parts of organic solvent. During use, the main agent and the curing agent are uniformly mixed, and the mixture is applied to the surface of a substrate. A film formed by the coating is high in corrosion resistance and low in content of volatile organic compounds (VOC), does not contain any toxic or harmful substance, can be universally used in a drinking water tank, and also can be used for a ship ballast tank, a ship bottom, a deck and each position of a marine platform.

A production method of anti-corrosion and high strength ultra-thick steel plates comprises the process flows of (1) raw material preparing, (2) smelting in a converter, (3) LF refining, (4) vacuum degassing in a VD furnace, (5) continuous casting, (6) plate blank heating, (7) rough rolling, (8) finish rolling, (9) controlled rolling and cooling by ACC, (10) online normalizing, (11) finishing and (12) finished product warehousing. The method is characterized in that the steel comprises the following components by weight: 0.05-0.13% of C, 0.10-0.50% of Si, 0.6-1.60% of Mn, not more than 0.015% of P, not more than 0.005% of S, not more than 0.05% of Nb, not more than 0.02% of Ti, 0.02-0.06% of Al, not more than 0.60% of Ni, not more than 0.70% of Cu, not more than 0.1% of V, not more than 0.008% of N and the balance Fe and inevitable impurities. The steel plates produced by the method have high strength, high tenacity and anti-marine corrosion property.

The invention discloses a marine-corrosion/hot-corrosion-resistant composite coating and a preparation method thereof, belonging to the technical field of metal surface protection. A novel FeCrAlRe hot-corrosion-resistant powder core wire material is prepared by coating mixed powder, containing Cr powder, Al powder and the like, on a carbon steel band. A ZnAlMgRe powder core wire material is prepared by coating mixed powder, containing Al, Mg, Zn and Re, on a Zn-base alloy band. The preparation method of the composite coating comprises the following steps: spraying the FeCrAlRe powder core wire material by using a high-speed arc spraying device to form an alloy coating on a pretreated steel base surface, and spraying a ZnAlMgRe coating to form a double-layer composite structure protective coating. The prepared coating can resist hot corrosion, and has excellent corrosion resistance in a marine high-humidity high-salt-mist environment.

The invention discloses a quick-hardening early strength magnesium phosphate concrete, which is mainly prepared from the following components in weight percentage: 12.7 to 30 percent of magnesia, 8.7 to 20 percent of phosphate, 1.2 to 15 percent of retarder, 10 to 25 percent of fine aggregate, 10 to 50 percent of water and the balance being water. The concrete material has the characteristics of quick coagulation and hardening, high early strength, good erosion resistance and the like, and can be widely applied to the quick repairing in projects or structures such as railways, airfields, bridges, harbors and docks and the quick solidification and closing of toxic and harmful substances, and can also be applied to the civil engineering and building construction under the sever conditions of sulfate erosion, marine corrosion, low temperature and the like. The invention has the advantages of simple preparation method, process and necessary equipment, low cost, no pungent ammonia gas generation in the construction and convenient popularization and application.

The invention discloses a dry-type Christmas tree based ultra-deepwater oil and gas development system and a mounting method thereof. The system comprises a water float, underwater wellhead chambers, dry-type Christmas trees, a water manifold device, an upper flexible stand pipe and a floating-type water surface production device, wherein the dry-type Christmas trees and related equipment are mounted in the underwater wellhead chambers; the underwater wellhead chambers are formed in a wellhead of the water float; oil outlet pipelines of the underwater wellhead chambers are connected with the inlet of the water manifold device; the water float is positioned in the position with the depth of 100-400 m under the water, and is moored to a sea bed through tension cables. According to the invention, the underwater dry-type Christmas trees are adopted, and the dry-type Christmas trees and the related equipment are separated from the sea water environment through the underwater wellhead chambers, so that compared with wet-type Christmas trees, influence of marine corrosion and pressure as well as sea bed sludge and marine creatures on the dry-type Christmas trees is avoided; the suitability is strong, the operation is convenient and safe, the maintenance cost is low, and the situation that divers are not needed to perform installation can be realized completely.

The invention discloses a large range reinforcing steel corrosion monitoring sensor based on fiber bragg grating sensing technology. The sensor comprises a sector which is formed by an inner layer fan-shaped backing plate and an outer layer fan-shaped backing plate and is perpendicular to the axis of a reinforcing steel to be detected, a fiber with at least one section of sensitive grating and an elastic plastic shell. The plastic shell is arranged at two outer sides of the sector which is formed by an inner layer fan-shaped backing plate and an outer layer fan-shaped backing plate. A fiber micro grating type reinforcing steel corrosion stress sensor of the invention has long-term stability in a marine corrosion environment, the size of the corrosion expansion stress of a detected reinforcing steel and the time process of concrete member cracking are monitored in the condition that a chlorine ion penetration effect is not affected, a defect that the early reinforcing steel corrosion can not be monitored and the corrosion expansion stress can not be measured in the prior art is overcome, an objective basis and detailed data are provided for scientific research and daily maintenance decision, the remote monitoring can be realized, the precision is high, and the reliability is good.

The invention relates to a metallic erosion experimental apparatus, in particular to an intelligent marine corrosion simulation tester for measuring erosion conditions of metals in the marine environment through computer control. The invention comprises a heatable main water tank, a water storage tank and a control panel, wherein, peristaltic pumps are arranged on the tester and respectively inserted into the main water tank and the water storage tank through peristaltic pump pipes; an electrically controlled wave generating plate and a test strip holder are arranged inside the main water tank; the control panel is positioned above the water storage tank; and the peristaltic pumps, an electric control device which is connected with the wave generating plate and a heating device on the main water tank are respectively connected with the control panel. The metallic erosion experimental apparatus can actually simulate the erosion environment of five different zones of open sea and have good correspondence with the erosion environment of the open sea, thereby not only saving a mass of labor power, physical resources and financial resources but also guaranteeing the completeness of test data and the reliability of a test structure; the operation is simple and the visualization degree is high, thereby being convenient for observation; and the simulation environment is various and true.

The invention relates to a metallic erosion experimental device, in particular to a marine erosion simulation tester for measuring erosion conditions of metals in the marine environment. The invention comprises an upper water storage tank, a lower water storage tank and a main water tank, wherein, a siphon tube is arranged between the main water tank and the lower water storage tank; one end of the siphon tube is positioned inside the main water tank and the other end of the siphon tube is inserted into the lower water storage tank; the upper water storage tank is communicated with the lower water storage tank through a water pipe capable of controlling the flow rate; a water inlet pipe capable of controlling the flow rate is arranged on the upper water storage tank and the other end of the water inlet pipe is inserted into the main water tank; an electrically controlled wave generating plate and a test strip holder are arranged inside the main water tank; a sea mud zone at the bottom is provided with a plurality of baffle plates; a liquid level controller is arranged on the upper water storage tank and connected with the water pipe through an electrical wire; a filter screen is arranged inside the lower water storage tank and water which is filtered by the filter screen passes through the water pipe and flows into the upper water storage tank; the wave generating plate is connected with a driving motor through a transmission tension rod; and the test strip holder can hang pieces respectively or hang pieces through electrical interlocking. The test result of the device is reliable and convenient for observation, and the simulation environment is various and true.

The invention belongs to the technical field of marine corrosion and protection and relates to a simulated accelerated corrosion testing method of a ship fastener and a protective coating. Soaking, damp and hot, drying and salt spray tests can be carried out on different specifications of fasteners and protective coatings by using natural seawater and 5% of NaCl solution as a test medium; in situ monitoring is carried out by using an electrochemical method; and process information and corrosion test result are combined with each other so as to obtain a corrosion rule of the fastener material and the protective coating; and the method comprises the specific steps of testing device selection, specimen pretreatment, corrosion experiment circulating and test result displaying; and the method provided by the invention has the advantages of simple processing steps, safe and reliable principle, friendly test environment, small test cost, mature equipment, intuitive result display and good applicability.

The invention discloses a non-contact electric energy transmission coupler in a deep ocean. The coupler comprises an upper moving magnetic core mechanism, a lower fixed magnetic core mechanism and a clamping releasing mechanism which are on a coaxial-line device. The upper moving magnetic core mechanism is provided with a first ferrite core, the lower fixed magnetic core mechanism is provided with a second ferrite core; a primary winding and a secondary winding are arranged in the first ferrite core and the second ferrite core respectively, and the relative position of the primary winding and the secondary winding is fixed by the clamping releasing mechanism in the charging process of the coupler, thus forming electromagnetic coupling to cause the electric energy to be transmitted to electric equipment; after the charging is finished, the primary winding and the secondary winding are separated, and the electric equipment can move freely. The invention can realize the electric energy transmission under water, thereby avoiding physical contact and electrical connection of interfaces of electricity transmission; fluid sealant is adopted to encapsulate and separate, thus avoiding marine corrosion and electric leakage. As the coupler has no cavity, high pressure in the deep ocean can be borne. The coupler has simple structure, is pressure resistant, has good tightness and high reliability and can effectively solve the defects of bad security of the interfaces of electricity transmission in the deep ocean and high cost.

The invention belongs to the technical field of marine corrosion tests, and relates to a novel test method for testing couple corrosion in a seawater scouring environment. The method comprises the following steps of: preprocessing test samples by using a flowing type water trough scouring corrosion experimental device, making test sample installing stages rightly opposite in pairs, and supporting the test sample installing stages with PVC supporting bars, wherein the test sample installing stages are closely attached to the walls of an experimental trough and are fixed on the two sides of the experimental trough; starting a seawater pump, regulating the flow rate of the seawater pump with a frequency converter so as to meet test requirements, and connecting each group of couple pair test samples after the water flow becomes stable; performing the experimental test of simulating an electrical insulation state under the condition of directly connecting two wires or loading a resistor; and testing and recording the numerical values of material potentials, coupling potentials and coupling currents of the test samples, photographing and washing and weighing corrosion products respectively, computing the couple corrosion rate of the materials, and drawing coupling potential-time curves. The method has the advantages of simple and reliable test theory, safe used equipment, accurate test parameters and high computability and applicability.

The invention relates to acrylic acid modified chlorinated rubber coating and a method for preparing the same. The coating consists of: 1 weight portion of chlorinated rubber, 0.05 to 0.4 weight portion of acrylic acid resin, 0.005 to 1.03 weight portions of chlorinated paraffin, 0.08 to 0.5 weight portion of epoxy resin, 0.05 to 3.0 weight portions of dimethylbenzene, 0.01 to 1.5 weight portions of heavy aromatic solvent, 0.005 to 0.045 weight portion of fluoro-carbon modified acrylic acid resin, 0.006 to 0.5 weight portion of titanium white powder, 0.01 to 0.8 weigh portion of talcum powder, and 0.005 to 0.05 weight portion of organoclay. The coating has the characteristics of single composition packing and drying film formation under normal temperature. A paint film of the coating has excellent physical property, chemical resistance, salt spray resistance and anti-photoaging property, and can be used for the protection and coating of the surfaces of steel structures under the environment of marine corrosion.

The invention belongs to the technical field of marine corrosion and fouling prevention and relates to a method for preparing a metallic antifouling coating of a ship sea chest. The method comprises the following steps: firstly, pretreating a ship sea chest or sea grating substrate, wherein the pretreatment comprises oil removing, sand blasting and dust removing; and then preparing mixed powder by uniformly mixing copper powder or copper alloy powder and cuprous oxide powder or zinc oxide powder and placing the mixed powder in a cold spraying device; and lastly, twice spraying the mixed powder carried by nitrogen, helium or air onto the ship sea chest or sea grating substrate twice under the condition of controlling the temperature of a main gas to finally a metallic compound coating which is characterized by high bonding force and long antifouling period. The preparation process is simple. The thickness of the coating and the active antifouling components are controllable. The manual maintenance is unnecessary and no hole is drilled on a ship shell. The sailing safety of the ship is high. The coating has excellent density and high hardness and bonding force.

The invention discloses functional composite coating and a preparing method thereof and belongs to the technical field of coatings. The functional composite coating solves the problems that a corrosion-resisting coating in the prior art is large in thickness, low in elasticity, easy to damage in larger stress impact, poor in friction resistance, poor in marine corrosion resistance, short in service life and unable to be used in a wider temperature range. The composite coating is composed of a base coat, a floating coat and a cover coat, wherein the base coat is composed of a zinc chromate primer and a zinc chromate primer curing agent according to a weight ratio of 8 to 1, the thickness of the base coat is 35-65mum, the floating coat is composed of epoxy resin, an epoxy curing agent, a flexibilizer and a filling agent, the thickness of the floating coat is 0.25-0.45mum, the cover coat is composed of fluorocarbon painting and functional painting according to a weight ratio of 1 to 1, and the thickness of the cover coat is 0.4-0.8mum. The composite coating has excellent corrosion resistance, friction resistance and impact resistance, is small in coating thickness and high in elasticity, can resist high-low temperature change of seawater and can be used in a wider temperature range.

The invention relates to an ultrahigh strength coating steel wire dip-coated with a Zn-Al-Mg-Si alloy coating, a preparation method thereof and an application thereof. The alloy coating consists of the following components in percentage by mass: 30-97% of Zn, 5-80% of Al, 0.02-11% of Mg, and 0.05-5.0% of Si, based on 100% in total. The preparation method comprises the following steps: inspecting performances of an original coil rod; carrying out surface treatment; carrying out wire drawing; preparing a hot dipping Zn-Al-Mg-Si alloy coating; and carrying out stabilization treatment. The ultrahigh strength coating steel wire with the Zn-Al-Mg-Si alloy coating provided by the invention has corrosion resistance and mechanical performance superior to those of a current high-strength zinc-coated steel wire; the preparation method is easy to implement, meets needs of special environments such as a marine corrosion environment and the like on a bridge steel wire, and has a wide market prospect.

The invention relates to a chlorinated polyether resin coating and a production method thereof. The coating contains 1 weight part of chlorinated polyether resin, 0.025-0.5 weight parts of chlorinated paraffin wax with chlorine content of 52%, 0.008-0.5 weight parts of acrylic acid-modified fluorocarbon resin, 0.05-3.0 weight parts of dimethylbenzene, 0.01-1.2 weight parts of heavy aromatic solvent, 0.005-0.01 weight parts of dimethyl silicon oil, 0.005-0.25 weight parts of aluminum tripolyphosphate, 0.006-0.5 weight parts of titanium white powder, 0.01-0.4 weight parts of talc powder and 0.005-0.05 weight parts of organic bentonite. The coating is characterized in that: the components are packaged independently and are dried at room temperature to form coating. The coating is excellent in physical property, chemical resistance, salt spray resistance and light fastness, and can be used for the surface protection and coating of steel structure and concrete in corrosive marine environments.

The invention relates to a method for preparing an oxidation-resistant composite coating for a carbon ceramic brake disc. The method comprises the following steps: preparing glass slurry to serve as a high-temperature self-healing coating by taking cordierite powder, glass powder and an organic adhesive as raw materials, preparing a solution to serve as a passivating coating by taking phosphate as a raw material, uniformly coating the glass slurry and the solution on the surface of a carbon ceramic brake material, and performing high-temperature heat treatment to obtain a dense coating which can be well combined with a matrix. The method has the beneficial effects that (1) the coating is uniform and dense and is well combined with the matrix; (2) the coating is excellent in oxidation resistance and thermal shock resistance; (3) the coating is high in marine corrosion resistance; and (4) the preparation process of the coating is simple in process, short in period, low in cost, convenient, feasible and suitable for industrial preparation.

The invention discloses a rare earth-aluminium-magnesium alloy wire for thermal spraying, belonging to the technical field of metal alloys. The alloy wire comprises the following components by weight percent: 1%-5% of Mg, 0.1%-0.5% of RE, 0.1%-0.2% of Ti and the balance of Al. The alloy wire disclosed by the invention has the following beneficial effects: the rare earth-aluminium-magnesium alloy wire is easy to prepare and has lower cost, good comprehensive mechanical property and good corrosion resistance; the metal thermal spraying coating prepared from the alloy wire has the advantages of dense coating, low porosity, high bonding strength with the matrix and good corrosion resistance; and particularly, the metal thermal spraying coating has excellent corrosion resistance in the marine corrosion environment and can be widely used in the corrosion protection of the steel structure.

The invention provides a manufacture method of novel marine corrosion resistance stainless steel and a steel cable thereof. The marine corrosion resistance stainless steel comprises chemical compositions in the respective mixture ratio: less than 0.03 of C, less than 0.80 of Si, less than 0.50 of Mn, less than 0.03 of P, less than 0.01 of S, 22.0 to 25.0 of Cr, 13.0 to 15.0 of Ni, 3.0 to 5.0 of Mo, 2.0 to 4.0 of Cu, 0.10 to 0.20 of Nb, 0.30 to 0.45 of N, 0.03 to 0.06 of RE and the balance of Fe and unavoidable impurities. Steel wires required by the steel cable carry out electrolytic polishing processing before stranding. Compared with 316 stainless steel cables under the conditions of the same structure and the same cable diameter, the steel cable manufactured by the method of the invention has the advantages that the breaking force of the whole cable is improved by 3 to 4 KN, at the same time, the marine corrosion resistance annual corrosion speed rate in the environment such as marine atmosphere, splash zones, tidal zones, deep sea and the like is improved by more than ten times, and the maximum annual corrosion resistance depth is reduced by more than 5 times.

The invention relates to the fields of marine corrosion and self-lubrication, and particularly provides a self-lubricating composite coating with resistance to marine corrosion and wear and a production technology of the self-lubricating composite coating with the resistance to marine corrosion and wear. The coating is composed of organic film forming matters and micron-sized filler, wherein the mass percentage of the organic film forming matters is 40%-60%, and the organic film forming matters comprise 10%-21% of epoxy resin, 15%-26% of epoxy-modified organic silicon resin, 6%-13% of polyamide resin and 4%-7% of a wetting dispersant; and the micron-sized filler is a combination of 10%-20% of graphite, 16%-30% of silicon carbide and 10%-25% of teflon. The coating is simple in production process and low in cost, the needed production raw materials can be directly bought on the market, and the coating not only can be used for marine equipment, but also is suitable for transmission partswhich serve in corrosive environments of aviation, electric power, chemical engineering and the like. On the basis of high corrosion resistance and flexibility, of the organic film forming matters, incombination with wear resistance and self-lubrication of the micron-sized filler, the composite coating has high impact toughness and excellent comprehensive performance of marine corrosion resistance, wear resistance, self-lubrication and the like.

The invention relates to a preparation technology of superhydrophobic film layers, in particular to a simple method for carrying out superhydrophobic the surface of metal. A treated substrate is subjected to a one-step cathode electrodeposition method in an ethanol solution containing fatty acid and inorganic salt, and the surface of the substrate is covered with a fatty acid salt film layer, so that the superhydrophobic on the surface of the metal is realized. The method provided by the invention is environmentally friendly, simple and easy to operate and low in cost; the prepared superhydrophobic film layer is expected to be widely applied to the fields such as marine corrosion protection, microbial adhesion resistance, anti-icing and self-cleaning.

The invention belongs to the technical field of preparation of anticorrosive coatings, and particularly relates to a preparation method and application of a modified anticorrosive super-hydrophobic integrated coating, the method comprises the following steps: respectively preparing a graphene titanium dioxide compound from graphene and tetrabutyl titanate, preparing a zinc-aluminum hydrotalcite anticorrosive material from sodium metavanadate, zinc chloride and aluminum chloride, preparing a PDMS organic emulsion from polydimethylsiloxane and tetrahydrofuran, then performing surface modification on the graphene titanium dioxide compound through dopamine hydrochloride and a zinc-aluminum hydrotalcite anticorrosive material to obtain a dopamine modified composite material, and finally, preparing the modified anticorrosive super-hydrophobic integrated coating from the dopamine modified composite material and a PDMS organic emulsion. Performance tests show that compared with a conventionalmarine anticorrosive coating, the coating prepared by the invention has better anticorrosive and super-hydrophobic effects, is applied to the field of marine corrosion prevention, and can effectivelyprolong the service life of the coating on a protective substrate.

The invention belongs to the technical field of marine corrosion and protection. The invention relates to an anticorrosion and antifouling integrated self-repairing microcapsule and a preparation method thereof. An anticorrosive coating self-repairing agent and a biological antifouling agent are used as a two-component capsule core; urea-formaldehyde resin obtained by condensation polymerization of urea and formaldehyde is used as a capsule wall; dispersants such as emulsifiers are added, the core material is uniformly dispersed into ultrapure water to form a stable oil-in-water microemulsion;then, the urea and the formaldehyde are subjected to condensation polymerization to coat the microemulsion; thus, the anticorrosion and antifouling integrated self-repairing microcapsule with uniformparticle size and a core-shell structure is prepared. The anticorrosion and antifouling capability and the anticorrosion and antifouling service life of the organic coating can be prolonged; the operation stability of marine equipment and ships is improved, particularly, long-period corrosion protection and fouling protection can be provided for large equipment and metal structures operating in ahigh-temperature, high-salt, high-humidity and high-radiation tropical marine environment, and very high social and economic values are achieved.

The invention discloses a large-tonnage marine corrosion prevention metal damping seismic mitigation and isolation steel supporting seat. The supporting seat comprises an upper supporting seat plate, a spherical crown liner plate and a lower supporting seat plate, wherein the spherical crown liner plate is mounted between the upper supporting seat plate and the lower supporting seat plate and consists of an upper liner plate and a lower liner plate; an liner plate mounting groove is formed in the lower supporting seat plate; the lower liner plate is fixed in the liner plate mounting groove; the upper liner plate is fixedly connected to the upper supporting seat plate; the outer bottom wall of the upper liner plate is in contact with the liner mounting groove; the bottom surface of the upper liner plate is in sliding fit with the top surface of the lower liner plate, and the fitting surface is a spherical crown surface; the outer side of the upper liner plate is provided with a falling-off prevention stopper fixedly connected with the upper supporting seat plate; the bottom surface of the falling-off prevention stopper is fixed with one end of an anti-seismic stopper through a shearing-resistant bolt; the other end of the anti-seismic stopper is in contact with the outer wall of the upper liner plate; a gap is reserved between the outer wall of the falling-off prevention stopper and the outer wall of the upper liner plate; and the a metal damper is mounted between the upper supporting seat plate and the lower supporting seat plate on the outer side of the falling-off prevention stopper. When an earthquake occurs, the supporting seat has a two-stage protecting structure, so that the supporting seat main body cannot be damaged, and falling off of beams can be avoided.

The invention relates to the field of socket connectors used underwater, in particular to a launching detection sensor applied in underwater operations. The detection sensor is installed on equipment used underwater and provided with a stainless casing and contact pins, wherein the contact pins are uniformly distributed in the stainless casing, one end of each contact pin is exposed out of the stainless casing, and the other end of each contact pin is connected with a conducting wire. The detection sensor provided by the invention can issue signals after the equipment is put into the water under severe sea conditions, so as to prove that the equipment is in the water, and various procedures enter into a working state after receiving the signals; the detection sensor is marine-corrosion resistant, can be used both in shallow sea and abyssal sea, is suitable for various equipment for underwater operation and can be arranged on a ROV and an AUV for issuing launching signals; and can solve the problems of the prior art, such as poor leak tightness, and incapability of timely transmitting the launching signals.