2 results about "Chloride corrosion" patented technology

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.