10 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.

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 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 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 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.