30results about How to "Increased resistance to salt spray" patented technology

The invention belongs to the technical field of paints, and particularly relates to a high-temperature ceramic organosilicon-phenolic epoxy anticorrosive paint and a preparation method thereof. The paint is characterized in that organosilicon-phenolic epoxy resin is synthesized through a chemical grafting method, and the resin simultaneously has an organosilicon chain segment and a phenolic epoxy chain segment. On the one hand, the resin has the characteristics of heat resistance, weather resistance, wear resistance, flexibility and the like of the organosilicon chain segment, the phenolic epoxy chain segment on the resin molecule has a higher metal base material adhesive force than the organosilicon chain segment, and the corrosion resistance effect after the phenolic epoxy chain segment is crosslinked with a curing agent is higher than that of the organosilicon chain segment, thereby solving the problems of low adhesive force and poor anticorrosive effect of the organosilicon paint; and on the other hand, the carbon residue rate of the phenolic epoxy chain segment in a high-temperature environment is high, and the phenolic epoxy chain segment and a thermal degradation product of the organosilicon chain segment in the high-temperature environment can form secondary film forming action, thereby improving the ceramic effect of a coating in the high-temperature environment.

The invention relates to the technical field of permanent magnets, and particularly relates to a high-temperature-resistant samarium-cobalt permanent magnet and a preparation method thereof. The high-temperature-resistant samarium-cobalt permanent magnet provided by the invention comprises a samarium-cobalt permanent magnet base body, a copper plating layer arranged on the surface of the samarium-cobalt permanent magnet base body and a nano carbon material layer arranged on the surface of the copper plating layer. According to the invention, the heat resistance of the samarium-cobalt permanentmagnet is improved by utilizing the thermal insulation property of the nano carbon material layer, so that the samarium-cobalt permanent magnet can be used in an environment of 500 DEG C or above. Inthe invention, the copper plating layer is used as a growth auxiliary agent, which is beneficial to ensuring the generation of the nano carbon material layer. The samarium-cobalt permanent magnet provided by the invention has excellent high temperature resistance and can be applied to novel low-field nuclear magnetic equipment. In addition, the samarium-cobalt permanent magnet provided by the invention also has an excellent anti-corrosion effect, and the salt spray resistance time is up to 360 hours.

The invention provides a blue-white passivation agent for a high salt spray galvanized layer and its preparation method and passivation treatment method. The passivation agent uses deionized water as a solvent, and the solute includes a component whose concentration is as follows: nitric acid Chromium 10-20g / L, oxalic acid 2.5-4g / L, malic acid 2-4g / L, nitrilotriacetic acid 1.5-3g / L, potassium hydroxide 3-5g / L, cobalt nitrate 2-3g / L, tungstic acid Sodium 0.5-0.8g / L, lanthanum nitrate 0.25-0.4g / L, γ-aminopropyltriethoxysilane 0.4-4g / L. The passivating agent of the present invention greatly improves the salt spray corrosion resistance of the galvanized parts while making the plating solution free of hexavalent chromium, and at the same time makes the plated parts have a beautiful blue-white film layer to improve decoration, The preparation method and passivation operation process are simple and easy to control.

The invention relates to an additive for bright nickel plating technology for a permanent magnetic material. The additive comprises a primary brightening agent, a secondary brightening agent and an auxiliary additive, wherein the primary brightening agent is a compound containing an acetylenic bond or sulfonyl; sulphur in the sulfonyl is positive quadrivalent or positive hexavalent; and the secondary brightening agent is a pyridine derivative. By a combination of the pyridine derivative, a ynamine compound and a propiolic alcohol derivative and a combination of a softening agent (impurity removing agent) and a low-foam wetting agent, the novel additive for the bright nickel plating technology is prepared, and has high bright dipping speed, high dispersibility, high color and luster uniformity, fewer decomposition products, long processing cycle, high level, good ductility, high impurity tolerance, low stress and excellent electrochemical performance.

The invention belongs to the technical field of paint, and particularly relates to a transparent nano silicon dioxide-epoxy resin anticorrosive paint and a preparation method thereof. Firstly, the dispersion size of the nano silicon dioxide in the coating is much smaller than the wavelength of visible light; and therefore, the coating formed by applying and curing the paint has favorable transparency, and people can clearly observe the shape, size, color and other properties of the object under the coating through the coating. Secondly, the epoxy-resin-grafted nano silicon dioxide filler can be sufficiently dissolved and wetted by the paint resin easily; especially, the particle size of the epoxy-resin-grafted silicon dioxide is nano-sized, so the epoxy-resin-grafted silicon dioxide has huge specific area and surface nano effect and can form firm interface binding force with the resin in the coating, thereby greatly eliminating the defects and pores in the anticorrosive coating, inhibiting the anticorrosive coating from embrittlement-caused cracking, underfilm corrosion and the like, and further obviously enhancing the corrosion-resistant effect and service life of the anticorrosive coating.

The invention belongs to the technical field of coatings and in particular relates to an epoxy resin-graphene interface chemical bonding anticorrosive coating and a preparation method thereof. In the anticorrosive coating, graphene grafted with epoxy resin is added to serve as filler, and the filler is prepared through a peroxide treatment technology. The epoxy resin grafted to the surface of the graphene has high compatibility with epoxy resin in the coating, can be uniformly dispersed in the epoxy resin in the coating, and carries out a cross-linking reaction with a curing agent so as to obtain the epoxy resin-graphene interface chemical bonding anticorrosive coating. The coating disclosed by the invention is wide and readily available in raw materials, can be produced on general coating manufacturing equipment and can be coated by multiple methods such as brushing, spraying and dipping, and the coating layer obtained after coating curing has the characteristics of corrosion resistance, high strength, high conductivity and the like. The anticorrosive coating obtained after coating curing can be independently used and can also be matched with corresponding intermediate coat or finishing coat.

The invention relates to a preparation method of an epoxy-resin-grafted glass scale filling material. The material is characterized in that the epoxy-resin-grafted glass scale filling material is prepared from raw materials of, by mass: 100 parts of glass scales, 0.5-90 parts of a bridging agent, 5-200 parts of epoxy resin, 0.0001-0.1 parts of a catalyst, and 100-10000 parts of a solvent. The preparation method of the epoxy-resin-grafted glass scale filling material comprises the steps that: first, preparation works are carried out, wherein the glass scales are subject to a drying treatment, epoxy resin is subject to a dewatering treatment, and the solvent is dewatered; polyisocyanate-modified glass scales are prepared; and then the epoxy-resin-grafted glass scale filling material is prepared. With the method provided by the invention, a problem of poor interfacial compatibility between anticorrosive resin paint and the glass scale filling material is solved, such that the corrosion resisting effect and the service life of an anticorrosive coating are substantially improved.

A method for improving the corrosion resistance of polyvinyl alcohol water-based coatings by heating and secondary curing, belonging to the technical field of coatings, the method adopts graphene, phosphor powder, SiO 2 , SiC is added to the polyvinyl alcohol solution as a mixed filler, and the coating is stabilized by secondary curing by heating. The invention utilizes the high thermal conductivity of nano fillers to improve the secondary curing efficiency, effectively reduce the binding sites of water molecules in the coating, and greatly reduce the water transport channels formed by polar groups in the coating, thereby improving the adhesion of the coating and corrosion resistance; at the same time, the secondary curing can strengthen the coating, enhance the combination of mixed fillers, further promote the barrier effect of graphene, and promote the formation of phosphorus and SiO 2 And SiC play its role in improving the cross-linking density of the coating to form a stable and dense three-dimensional network structure, thereby improving the compactness of the coating and achieving a better anti-corrosion effect; the method of the invention is safe and environmentally friendly, simple to operate, and has better realization sex.

The invention discloses a method for improving the corrosion resistance of metal components, which comprises the following steps: preparing component A and component B, mixing component A and component B at a mass percentage of 100:5-30 to obtain a scale-shaped Epoxy ethylene-zinc paint, the prepared flake type epoxy ethylene-zinc paint is sprayed on the metal member to be sprayed by HVLP spraying process, the spraying distance during HVLP spraying is 15-30cm, and the spraying air inlet pressure is 0.7-2.0 bar, the atomizing pressure of the hood is 0.2‑0.7 bar, and the compressed air flow rate is 15‑20 cfm. In the present invention, the prepared flake-type epoxy ethylene-zinc coating is applied to the surface of the metal member by HVLP spraying, the operation is simple, the content of metal zinc in the non-volatile matter of the metal member surface coating is reduced, and the salt spray resistance of the coating is improved, and the coating is improved. The corrosion resistance of metal components improves the performance and service life of metal components.

The invention discloses a zinc-nickel alloy blue passivator and a preparation method thereof. The passivator comprises an agent A and an agent B, wherein the agent A comprises a trivalent chromium compound, oxalic acid, citric acid, trisodium phosphate, sodium hydroxide, a complexing agent and deionized water; the agent B comprises cobalt salt, nickel salt, sodium salt, a stabilizer and deionizedwater. The preparation method of the zinc-nickel alloy blue passivator comprises the following steps: mixing the trivalent chromium compound, oxalic acid, citric acid and trisodium phosphate with water, heating and preserving heat to obtain a trivalent chromium compound solution, dropwise adding a sodium hydroxide solution into the trivalent chromium compound solution to obtain the agent A, mixingcobalt salt, nickel salt, sodium salt and the stabilizer with water to obtain the agent B, and mixing the agent A and the agent B with water to obtain the zinc-nickel alloy blue passivator. The bluepassivator is capable of reducing loss of coating; the service life of the passivator is longer; meanwhile, the passivated appearance is better; the corrosion resistance of the coating is greatly improved.

The invention belongs to the technical field of paint and particularly relates to a peeled type montmorillonoid loaded organic amine curing agent as well as a preparation method and application thereof. The curing agent is prepared from raw materials including montmorillonoid, amino acid, organic amine, a catalyst, a dispersant and a solvent, wherein a chemical structure is that an organic amine molecule is chemically grafted on the surface of a montmorillonoid nano-flake through quaternary ammonium salt of the amino acid; and the montmorillonoid nano-flake is at a peeled state. The peeled type montmorillonoid loaded organic amine curing agent can be uniformly dispersed into a coating formed by curing epoxy paint; the surface grafted organic amine molecule is used as a medium and the compatibility between the montmorillonoid nano-flake and epoxy resin in the paint is extremely improved; the problem of the montmorillonoid nano-flake that the interface compatibility is not good, caused by the fact that surface molecule structures of the organic epoxy resin is relatively great, is solved; and defects including agglomeration, separation, precipitation and the like of the montmorillonoid nano-flake in anticorrosive paint are avoided.

The invention relates to a preparation method of an epoxy resin grafted montmorillonite filler. The montmorillonite filler is prepared from the following raw materials: 100 of montmorillonite, 1-45 of organic amine, protonating agent same molar equivalent with organic amine, 0.5-300 of epoxy resin, 100-10000 of dispersant, and 10-5000 of solvent. The preparation method comprises the following steps of: firstly preparing organized montmorillonite; then adding epoxy resin to the organic montmorillonite, adding the solvent to regulate the viscosity of the reaction system, reacting at the temperature range of 15-140 DEG C for 1-24 hours, introducing epoxy resin molecules to the nano laminar surface of montmorillonite, and remaining the rest epoxide group; and stripping the nano lamella of montmorillonite to obtain the epoxy resin grafted montmorillonite filler. The obtained filler has few defects and pores, and can form a densified protective layer in an anti-corrosion coating, thereby significantly improving anticorrosion effect and service life of the anti-corrosion coating.

The invention provides a multicolor trivalent chromium passivant for a zinc coating, and a preparation method and a passivation treatment method thereof. The multicolor trivalent chromium passivant for the zinc coating comprises 65-75g / L of chromic anhydride, 95-110g / L of sulfuric acid, 10-20g / L of sucrose, 10-200g / L of chromic nitrate, 10-100g / L of diffusant, 20-200g / L of cobalt nitrate, 10-200g / L of hydrofluoric acid, 5-150g / L of nitric aicd, 5-150g / L of DL-tartaric acid and the balance of water. The invention provides a preparation method and an application method for the passivant. Film layers of two colors can be obtained through passivation treatment of the passivant, one is a blue film layer and the other one is a colorful film layer, the product belongs to the environmentally-friendly passivant, is free from toxic substances such as hexavalent chromium, mercury, lead, cadmium, phenlyate and the like, thus having no damage to a human body and environments.