19 results about "Chloride corrosion" patented technology

The invention discloses polyacrylate anti-deposition and cerium chloride synergistic composite corrosion inhibitor cooling liquid, relates to the field of cooling liquid, and is particularly suitable for a multi-metal cooling system. According to the method, polyacrylate, cerium chloride, benzotriazole, benzimidazole, ethylene glycol, deionized water and triethanolamine serve as core raw materials, during preparation, equipment and the raw materials are pretreated, then a base solution is prepared, the pH value is adjusted to be alkalescent, then polyacrylate and cerium chloride are dissolved and coordinated, an auxiliary corrosion inhibitor is added, and synergistic protection is formed. And defoaming, filtering and filling. The cooling liquid adapts to multi-metal material protection through the synergistic effect of deposition resistance of polyacrylate and corrosion inhibition and synergism of cerium chloride, the cooling liquid is diluted according to working conditions during application, waste cooling liquid is discharged after being subjected to combined treatment of biological contact oxidation and Fenton oxidation, a finished product needs to be stored in a proper environment in a sealed mode, and the protection performance, the environmental protection property and the storage stability are effectively considered.

According to the aluminum oxide catalyst carrier and the preparation method thereof, ethyl orthosilicate and cerium oxide are combined with aluminum oxide, a stable Si-O-Al covalent bond is formed on the surface of aluminum oxide, a compact SiO2 protective layer is constructed, direct contact between water vapor and hydroxyl is effectively isolated, and therefore the hydrothermal stability of the carrier is remarkably improved; according to the present invention, with the SiO2 network structure, the SiO2 network structure can effectively fix and disperse the CeO2 nanoparticles and prevent the CeO2 nanoparticles from agglomeration and inactivation, and the Al2O3 can promote the migration of the electrons and the oxygen species at the SiO2-Al2O3 interface so as to provide the second corrosion resistance barrier on the protection layer through the cooperation of the oxygen vacancy introduced by the CeO2 and the excellent Cl ion capture ability, such that the corrosion resistance of the aluminum oxide matrix can be further inhibited; the interface bonding strength is enhanced, so that the water poisoning resistance and chlorine corrosion resistance of the aluminum oxide catalyst in a high-humidity and high-chlorine environment are improved through the dual cooperation of tetraethoxysilane and cerium oxide.

The invention discloses a method and system for analyzing the mechanical property of a hogging moment area of a UHPC thin-layer reinforced steel-concrete composite beam, and belongs to the technical field of composite beam performance analysis data processing. The method comprises the following steps: obtaining a geometric mechanical property reduction model of the non-uniform rusted steel bar according to a steel constitutive model and mechanical property test data of the rusted steel bar; according to the UHPC constitutive model, comparing the ultimate load with the unloaded proportion and the ultimate load with the preloaded proportion under the same chlorine salt corrosion damage degree to obtain a concrete damage coefficient; a residual flexural capacity model of the UHPC reinforced steel-concrete composite beam after the load-corrosion effect is obtained according to a geometric mechanical property reduction model of the non-uniform corrosion steel bar and a composite beam force balance equation, and a long-term bending calculation model of the UHPC reinforced steel-concrete composite beam after the load-corrosion effect is obtained by introducing a correction coefficient; and the bearing capacity performance analysis accuracy of the steel-UHPC composite beam in the hogging moment area under the load-corrosion coupling action is improved.

This application discloses a chloride ion corrosion resistant coating for a soft-pack current collector, comprising a first coating and a second coating. The first coating is applied to the surface of the current collector, and the second coating is applied to the surface of the first coating. The first coating is made of composite polypyrrole, and the second coating is made of polypyrrole. The composite polypyrrole is 8-hydroxyquinoline-doped polypyrrole, with a molar ratio of 8-hydroxyquinoline to pyrrole monomers of (1~3):100. This application addresses the problem of chloride ion corrosion of the current collector in the high-concentration magnesium chloride system of aqueous magnesium-ion soft-pack batteries by designing a double-layer anti-corrosion coating consisting of an 8-hydroxyquinoline-doped polypyrrole underlayer and a pure polypyrrole surface layer, with optimized doping polymerization and coating processes. This coating combines strong interfacial bonding, dense physical barrier, and in-situ active corrosion inhibition, significantly improving the corrosion resistance of the current collector and the cycle life of the battery, thus meeting the industrial processing needs of soft-pack batteries.

This invention discloses a high-strength annular prestressed concrete pole and its preparation method, belonging to the technical field of concrete poles. The high-strength annular prestressed concrete pole comprises concrete and a prestressed reinforcement cage. The concrete contains silicate cement, silica fume, fine aggregate, coarse aggregate, a chloride-resistant component, a water-reducing agent, and water. The chloride-resistant component is prepared by emulsifying 15-17 parts of acrylate-styrene copolymer emulsion, 7-9 parts of cationic polymer, 2.5-3.5 parts of modified fluorinated nano-silica, 0.25-0.35 parts of blocked initiator, and 0.45-0.55 parts of migration promoter. During preparation, the aggregate and chloride-resistant component are first dry-mixed, water and admixtures are added in stages, and then the mixture is centrifuged, steam-cured, and subjected to gradient dehumidification curing. This invention, through the synergistic effect of the chloride-resistant component and curing process, significantly improves the pole's resistance to chloride corrosion and its strength, making it suitable for high-salt coastal environments and ensuring long-term stable service.

The invention discloses a high-strength annular prestressed concrete pole and a preparation method thereof, and belongs to the technical field of concrete poles. The high-strength annular prestressed concrete pole comprises concrete and a prestressed reinforcement cage, wherein the concrete contains Portland cement, silica fume, fine aggregate, coarse aggregate, an anti-chlorine component, a water reducing agent and water; the chlorine-resistant component is prepared by emulsifying the following components in parts by weight: 15 to 17 parts of acrylate-styrene copolymer emulsion, 7 to 9 parts of cationic polymer, 2.5 to 3.5 parts of modified fluorinated nano silicon dioxide, 0.25 to 0.35 part of closed initiator and 0.45 to 0.55 part of migration accelerant. The preparation method comprises the following steps: firstly, dry-mixing the aggregate and the anti-chlorine component, adding water and the additive in batches, stirring, and then carrying out centrifugal forming, steam curing and gradient dehumidification curing. Through cooperation of the chlorine-resistant component and the maintenance process, the chlorine corrosion resistance and strength of the electric pole are remarkably improved, the electric pole adapts to the coastal high-salt environment, and long-term stable service is guaranteed.

The application discloses a stainless steel high-temperature molten chloride corrosion resistance protection method, which comprises the following steps: depositing a molybdenum coating on the surface of the stainless steel; and performing vacuum annealing treatment on the stainless steel with the molybdenum coating deposited on the surface, so as to realize high-temperature molten chloride corrosion resistance protection of the stainless steel. The application adopts a magnetron sputtering technology to deposit a pure molybdenum coating on 304 stainless steel, the thickness of the coating is 1.5 microns, and vacuum annealing is performed at 800 DEG C for 3 hours. After the molybdenum coating 304 stainless steel subjected to vacuum annealing treatment is corroded in high-temperature molten chloride at 700 DEG C for 800 hours, the sample still maintains good stability. Compared with the stainless steel without the molybdenum coating, the stainless steel with the molybdenum coating but without annealing treatment, or the stainless steel with the molybdenum coating and subjected to different annealing time at the same temperature, the molybdenum coating subjected to vacuum annealing at 800 DEG C for 3 hours and then corroded in high-temperature molten chloride at 700 DEG C for 800 hours still maintains stability, can effectively protect the 304 stainless steel, and promotes the application of the 304 stainless steel as a structural material in the next generation of solar thermal power stations.

The present application relates to a kind of high flexibility hydrogen gas barrier resistant bio-based polyamide composition and its preparation method, the composition of the present application is by the synergistic matching of bio-based raw materials and specific components, different from the raw materials and process route of prior art.The composition has high flexibility and low tensile modulus under the premise of guaranteeing excellent melt strength, perfect adaptation complex forming process such as extrusion blow molding and 3D blow molding.By introducing special toughening agent and composite thermal stabilizing system, product shows excellent anti delamination performance and heat aging resistance under high temperature of 150 DEG C and dynamic mechanical stress, also has excellent resistance to calcium chloride corrosion ability.Especially prominent, the composition can still maintain high impact toughness under extremely cold environment of-40 DEG C, and has excellent barrier property to hydrogen, solves the technical contradiction of traditional material in new energy automobile hydrogen storage system, improves the use safety and life under extreme working condition.

The present invention belongs to the technical field of concrete anti-erosion detection technology and provides a concrete anti-erosion detection method based on a chloride corrosion model for concrete pipes. The method comprises the following steps: obtaining seawater chloride ion concentration data for a target area and determining a chloride corrosion model for the concrete pipes; correcting the chloride corrosion model for the concrete pipes based on the seawater chloride ion concentration data to obtain a corrected chloride corrosion model for the concrete pipes; conducting a simulation experiment on the performance degradation and mechanical damage mechanism of the concrete structure based on the corrected chloride corrosion model for the concrete pipes to obtain simulation experimental results; analyzing the durability of the concrete structure based on the simulation experimental results, and optimizing the concrete maintenance and management strategy based on the analysis results. By utilizing the chloride corrosion model for concrete pipes, the present invention can improve the quality and effectiveness of concrete anti-erosion detection and contribute to improving the design, management and maintenance of concrete pipe structures in complex coastal environments.

The present application relates to a kind of low alloy chloride corrosion resistant reinforcing steel and its production method, by the interrelated design of Si, Ni, Cr, combined with the synergistic addition of rare earth elements, the influence of each element on corrosion resistance, strength and plasticity is comprehensively considered, the relationship between composition and corrosion resistance, strength, plasticity is established.Combined with steelmaking, rolling production process design, give full play to the shielding effect of passivation film on chloride ion, ensure the chloride corrosion resistance of reinforcing steel and low cost.The strength, plasticity, corrosion resistance and economy of reinforcing steel are coordinated and matched.

The invention discloses a silver-loaded and anion-interspersed layered catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, a hydrothermal method is adopted for growing oxalate ion-interspersed layered ferrocobalt bimetal hydroxide CoFe-C2O4 < 2->-LDH on foamed nickel, and then the layered ferrocobalt bimetal hydroxide CoFe-C2O4 < 2->-LDH is soaked in an aqueous solution of AgNO3; and reacting to generate the silver-loaded oxalate ion interspersed layered ferrocobalt double metal hydroxide Ag / CoFe-C2O4 < 2->-LDH. The silver-loaded and anion-interspersed layered hydroxide has excellent catalytic activity and stability in seawater electrolysis oxygen evolution reaction. Under the applied voltage, the Ag nanoparticles generate AgCl in situ in the seawater oxygen evolution process, chloride ions can be fixed, and the Ag nanoparticles and C2O4 < 2-> anion groups which are embedded into the CoFe layered double hydroxides and have high electronegativity cooperate to construct a chloride ion erosion resistant barrier, so that the chlorine corrosion resistance of the NiFe layered double hydroxides in seawater electrolysis is enhanced.

The invention discloses an efficient chlorine salt corrosion inhibitor as well as a preparation method and application thereof, and belongs to the technical field of chlorine salt corrosion inhibitors. The chlorine salt efficient corrosion inhibitor is prepared from the following raw materials in percentage by mass: 10.2 to 33.0 percent of plants, 10.2 to 49.5 percent of a stabilizer, 7.5 to 41.6 percent of sodium gluconate and 7.5 to 38.0 percent of monopotassium phosphate, wherein the mass ratio of the plants to the stabilizer is 1: (1-3); the stabilizer is one or two of sodium citrate and lycium barbarum acid which are mixed in any ratio. The chlorine salt efficient corrosion inhibitor pays attention to adjustment of the influence of a chlorine salt type snow-melting agent on asphalt and asphalt mixtures, the stabilizer is added, and the influence of chlorine salt on asphalt aging and emulsification can be relieved through the synergistic matching of plants and the stabilizer.

The present invention discloses a modified ferric oxyhydroxide / sulfide hierarchical oxygen evolution electrode resistant to chlorine corrosion, and its preparation method and application. The present invention uses a pretreated nickel mesh (NM) as a substrate, directly grows a nickel sulfide (Ni3S2) nanosheet array on the substrate surface by a hydrothermal method, and then in situ grows a modified ferric oxyhydroxide-based (Ta‑FeOOH) catalyst with a nanosheet cluster morphology on the nickel sulfide surface by an etching method, thereby constructing a hierarchical oxygen evolution electrode. The Ta‑FeOOH / Ni3S2 / NM electrode prepared by this method effectively regulates the electronic structure inside the catalyst through multi-level interface design and element doping strategy, thereby improving the oxygen evolution performance of the electrode. At the same time, the composite structure of FeOOH / Ni3S2 induces the reaction of chloride ions Cl by the reasonable introduction of anion intercalation. ‑ The like-charge repulsion reduces the corrosion and oxidation of chloride ions at the oxygen evolution active sites, demonstrating the excellent chloride corrosion resistance of the oxygen evolution electrode and providing strong support for the development of seawater electrolysis technology.

The invention relates to the technical field of concrete, and particularly discloses fair-faced concrete for a subway station and a preparation method of the fair-faced concrete. The invention discloses fair-faced concrete for a subway station. The fair-faced concrete is prepared from the following raw materials in parts by weight: 330-350 parts of cement, 40-50 parts of mineral powder, 60-70 parts of fly ash, 150-162 parts of water, 740-780 parts of sand, 950-1050 parts of stones, 8-10 parts of an additive and 5-10 parts of modified hybrid fibers, the modified hybrid fiber is prepared by the following steps: S1, mixing absolute ethyl alcohol and deionized water according to a weight ratio of (8.5-9.5): 1, then adding 1-1.5% of a silane coupling agent, and hydrolyzing at 60-70 DEG C for 25-35 minutes to obtain a pretreatment solution; s2, a hybrid fiber raw material is added into the pretreatment liquid according to the bath ratio of 1: (3-4), then nano silicon dioxide and rare earth mixed materials are added, the mixture is stirred to react for 50-60 min at the temperature of 45-55 DEG C, and then the mixture is taken out and dried to obtain the composite material, the hybrid fiber raw material is composed of basalt fibers and polypropylene fibers; the rare earth mixture is composed of lanthanum oxide, yttrium oxide and cerium oxide. The fair-faced concrete for the subway station, disclosed by the invention, is relatively good in sulfate and chlorine salt corrosion resistance.

The utility model belongs to the technical field of oxygen measuring equipment accessories, disclose a kind of oxygen measuring device mounting seat, this kind of oxygen measuring device mounting seat includes aperture blind plate, inner thread one, clamp loose joint, stainless steel round pipe, inner thread two, aperture pipe cap and manual butterfly valve, aperture blind plate is used to provide installation base for inner thread one, inner thread one is connected in aperture blind plate, for connecting oxygen measuring device, clamp loose joint is connected in aperture blind plate, stainless steel round pipe is connected in clamp loose joint, medium flow in stainless steel round pipe is created stable, suitable measuring environment for oxygen measuring device by manual butterfly valve, oxygen measuring device is connected by inner thread one, inner thread two is connected by external connection pipe, it is convenient to the assembly, disassembly and maintenance of device, greatly reduce installation and operation difficulty, improve work efficiency, by the material quality of stainless steel round pipe has good chloride corrosion resistance, solve mounting seat material easy ageing, corrosion, affect service life and performance problem.

The corrosion-resistant phosphoric acid-based geopolymer coating comprises metakaolin, an acid activator, a reaction medium, an organic modifier and an interfacial compatibilizer, the acid activator is a phosphoric acid solution, and the phosphorus-aluminum mass ratio of H3PO4 in the phosphoric acid solution to Al2O3 in the metakaolin is H3PO4 / Al2O3 = (1.2-1.4): 1; the organic modifier comprises simethicone, resin and a special curing agent for the resin; the dimethyl silicone oil and the epoxy resin respectively account for 1-9% and 10-30% of the mass of the metakaolin; the invention also discloses a preparation method. The hydrophobic performance, compactness and chloride ion corrosion resistance of the coating are improved, the corrosion inhibition efficiency reaches up to 96.45%, and a green and efficient protective coating is provided for a reinforced concrete structure in a highly corrosive environment such as ocean. The problems that a phosphoric acid-based geopolymer coating is relatively high in water absorption, relatively large in porosity, relatively weak in chloride ion penetration resistance and the like are solved.

The invention discloses a casing-cement sheath corrosion rate prediction method in a chloride corrosion environment, which comprises the following steps: step 1, setting initial conditions, and constructing a preliminary rust diffusion model; 2, dispersing the matrix to obtain rust concentration pressure distribution; 3, determining the volume of iron rust of cement expansion, and determining an expansion value around radial cement; 4, determining the relation between radial expansion and interface pressure; step 5, determining a critical value of the interfacial pressure when the crack is generated; and step 6, obtaining an interface pressure change rule, and obtaining the final corrosion rate of the casing-cement sheath in the chloride corrosion environment. The invention belongs to the technical field of oil field shaft corrosion prevention, and solves the problem that in the prior art, no appropriate model is provided for predicting the oil well cement crack property after underground casing corrosion, and the underground corrosion working condition is difficult to accurately predict.

The invention relates to a low-alloy chloride ion corrosion-resistant steel bar and a production method thereof, which are characterized in that the relation between components and corrosion resistance, strength and plasticity is established through the associated design of Si, Ni and Cr, the cooperative addition of rare earth elements and the comprehensive consideration of the influence of each element on the corrosion resistance, strength and plasticity. And by combining the steel-making and steel-rolling production process design, the shielding effect of the passivation film on chloride ions is fully exerted, and the chloride ion corrosion resistance and low cost of the steel bar are ensured. Coordinated matching of strength, plasticity, corrosion resistance and economical efficiency of the reinforcing steel bar is achieved.

The present invention discloses a method and system for analyzing the mechanical properties of a UHPC thin-layer reinforced steel-concrete composite beam in the negative bending moment zone, and belongs to the technical field of composite beam performance analysis data processing. The method comprises the following steps: obtaining a geometric mechanical property reduction model of non-uniformly corroded steel bars based on a steel constitutive model and test data on the mechanical properties of corroded steel bars; obtaining a concrete damage coefficient by comparing the ultimate loads of unloaded and preloaded ratios under the same chloride corrosion damage degree based on the UHPC constitutive model; and obtaining a residual bending bearing capacity model of the UHPC reinforced steel-concrete composite beam after load-corrosion using the geometric mechanical property reduction model of the non-uniformly corroded steel bars and the composite beam force balance equation; introducing a correction coefficient to obtain a long-term bending calculation model of the UHPC reinforced steel-concrete composite beam after load-corrosion, thereby improving the accuracy of the bearing capacity performance analysis of the steel-UHPC composite beam in the negative bending moment zone under load-corrosion coupling.