4492 results about "Corrosion inhibitor" patented technology

A forest fire retardant composition contains a retardant compound that includes a phosphate salt. The phosphate salt may include diammonium phosphate, diammonium orthophosphate, monoammonium phosphate, monoammonium orthophosphate, monosodium phosphate, disodium phosphate, disodium phosphate hydrate, sodium ammonium phosphate, sodium ammonium phosphate hydrate, sodium tripolyphosphate, trisodium phosphate, or dipotassium phosphate, and combinations thereof. The forest fire retardant composition may include an ammonium source. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

The invention discloses an extrusion production process for an aluminum alloy multi-cavity profile. The extrusion production process comprises the following steps that S1, raw materials are prepared; s2, designing and manufacturing a mold; s3, pretreatment before extrusion; s4, extrusion forming; s5, cooling treatment; s6, straightening and finishing; s7, aging treatment; and S8, detecting and packaging. According to the invention, the friction is further reduced by adopting a special high-temperature lubricant and an ultrasonic vibration device in the pre-extrusion pretreatment, the precise control is realized by arranging real-time monitoring and feedback systems such as a laser range finder and an infrared thermometer in the extrusion forming process, and the cooling treatment is realized by automatically adjusting parameters by adding a corrosion inhibitor and arranging a sensor, so that the production efficiency is improved. The cooling quality of the profile is ensured; laser scanning and electrolytic polishing technologies are adopted for straightening and finishing, the straightening precision and the surface quality are improved, a circulating hot air system and a segmented aging mode are adopted for aging treatment, and the aging effect is improved.

A forest fire retardant composition contains a retardant compound that includes a phosphate salt. The phosphate salt may include diammonium phosphate, diammonium orthophosphate, monoammonium phosphate, monoammonium orthophosphate, monosodium phosphate, disodium phosphate, disodium phosphate hydrate, sodium ammonium phosphate, sodium ammonium phosphate hydrate, sodium tripolyphosphate, trisodium phosphate, or dipotassium phosphate, and combinations thereof. The forest fire retardant composition may include an ammonium source. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

A forest fire retardant composition contains a retardant compound that includes a potassium salt. The potassium salt may include a potassium salt of an organic acid, a potassium salt of an inorganic acid, or mixtures thereof. The organic acid may include formic acid, acetic acid, propanoic acid, butanoic acid, lactic acid, oxalic acid, malic acid, gluconic acid, tartaric acid, uric acid, malic acid, or citric acid. The inorganic acid may include sulfuric acid, phosphoric acid, carbonic acid, or hydrochloric acid. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention discloses a corrosion inhibition type grey water scale inhibition dispersant and a preparation method thereof, belongs to the technical field of grey water dispersants, and aims to solve the problems of unstable scale inhibition performance and non-lasting scale inhibition efficiency of a grey water scale inhibition dispersant in the prior art. The technical problem that certain anti-corrosion and corrosion inhibition performance needs to be added to industrial grey water scale inhibition dispersants is urgently needed to be solved. The preparation method comprises the following steps that styrene, acrylamide and acrylic acid serve as raw materials, a polymer wall material is prepared, polyaspartic acid, a modified corrosion inhibitor and vanillin modified chitosan react, a core material is obtained, the core material and the wall material are prepared through a composite coacervation method, and the corrosion inhibition type grey water scale inhibition dispersing agent is obtained. The corrosion inhibition type grey water scale inhibition dispersant prepared by the invention has the advantages of stable and lasting scale inhibition effect and corrosion inhibition.

The invention relates to the technical field of metal surface protection, and discloses a corrosion-resistant self-repairing metal fastener and a preparation method thereof.The corrosion-resistant self-repairing metal fastener comprises a zinc alloy matrix, a nanometer passivation layer, a slow-release corrosion-resistant layer and a self-repairing functional layer, and the nanometer passivation layer, the slow-release corrosion-resistant layer and the self-repairing functional layer sequentially wrap the zinc alloy matrix; the zinc alloy matrix consists of Al, Cu, Mg, Ce and Zn; the nano passivation layer adopts zinc phosphate / silane composite sol to construct a Si-O-P covalent bond network, and plasma is combined to graft epoxy groups to enhance the interface bonding strength; the slow-release anti-corrosion layer is used for loading a pH response type benzotriazole derivative through gradient aperture mesoporous silica, so that the dynamic controlled release of a corrosion inhibitor is realized; the self-repairing functional layer adopts a synergistic effect of a mechanical triggering type sulfydryl siloxane microcapsule and a pH triggering type EDTA chelating agent microcapsule to form a physical plugging-chemical passivation dual-mode repairing mechanism. Through four-stage cooperation of matrix modification, interface strengthening, slow-release regulation and control and intelligent repair, the corrosion resistance of the corrosion-resistant self-repairing metal fastener in a complex environment is remarkably enhanced.

The invention relates to the field of oil well opening and killing fluid production, in particular to a solid-free well killing fluid for shale oil reservoir and a preparation method of the solid-free well killing fluid. The solid-free well killing fluid for the shale oil reservoir comprises the following raw materials in parts by mass: 50-70 parts of water, 10-30 parts of a density regulator, 3-6 parts of a copolymer tackifier, 1-3 parts of a dispersant, 3-7 parts of a filtrate reducer and 2-4 parts of a corrosion inhibitor. The copolymer tackifier is obtained by initiating copolymerization by taking acrylamide, a quaternary ammonium salt-containing monomer, an unsaturated silane coupling agent and polyethylene glycol diacrylamide as monomer free radicals, and the dispersing agent comprises gas-phase nano silicon dioxide and a fluorine-containing surfactant. Through reasonable compatibility of all the components in the formula, especially the copolymer tackifier, the effect that one agent has multiple functions is achieved, and meanwhile the high temperature resistance, the corrosion inhibition performance and the clay stability of the well killing fluid are improved.

The invention relates to a composite multi-effect scale and corrosion inhibitor and a preparation method thereof, and belongs to the technical field of water treatment agents.The composite multi-effect scale and corrosion inhibitor is prepared from carboxylic acid monomers, sulfonate monomers, organophosphorus compounds, modified chitosan, modified nanometer titania, oxidation type initiators, reduction type initiators, azole derivatives and the like, the modified chitosan is formed by coating the surface of chitosan with cerium chloride; the modified nano titanium dioxide is formed by coating the surface of nano titanium dioxide with sodium polyaspartate. The composite multi-effect scale and corrosion inhibitor is prepared in a mode of compounding while synthesizing, the scale inhibition effect is excellent, the comprehensive descaling capacity can reach 97% or above, and the composite multi-effect scale and corrosion inhibitor can be used for a high-pH, high-alkalinity, high-temperature and high-hardness circulating cooling water system under the high-concentration-multiple operation condition; the method is suitable for circulating cooling water treatment requirements under harsh conditions in industries such as chemical industry, smelting and light industry.

The invention relates to a self-repairing anti-corrosion water-based paint applied to the field of paint compositions, which is prepared by the following steps: firstly, preparing a self-repairing microcapsule encapsulated with a self-repairing agent and a corrosion inhibitor, and then uniformly dispersing the self-repairing microcapsule into water-based base resin under a low-shear condition; the prepared coating can be applied to the surface of a pretreated metal base material in a brush coating, spray coating or blade coating mode and the like, a micron-sized anti-corrosion coating is formed after curing, under the normal condition, the microcapsules are placed in the coating in a standing mode and do not work, when scratches occur, the self-repairing microcapsules are broken and play a role, and the corrosion resistance of the coating is improved. The self-repairing agent rapidly fills and heals the damaged part of the coating to form a new barrier layer, the corrosion inhibitor forms a protective film on the exposed metal surface to inhibit the corrosion reaction, and the synergistic mechanism can effectively delay the corrosion diffusion of the scratched part, so that the protection integrity of the coating on the base material is maintained, and the service life of the coating is prolonged. And the coating can be suitable for metal structure protection in severe environments such as ocean climate, high-humidity and high-salt environments, acid rain regions, chemical environments and the like.

The invention provides an ultrahigh-ductility cement-based composite material for ocean engineering and a preparation method of the ultrahigh-ductility cement-based composite material for ocean engineering. The concrete is prepared from the following raw materials in parts by weight: 250 to 500 parts of cement clinker, 400 to 600 parts of fly ash, 200 to 300 parts of mineral powder, 100 to 150 parts of silica fume, 160 to 240 parts of metakaolin, 600 to 900 parts of quartz sand, 10 to 20 parts of organic synthetic fiber, 20 to 30 parts of organic corrosion inhibitor, 180 to 240 parts of water and 1 to 8 parts of water reducing agent. The organic corrosion inhibitor provided by the invention can be combined with chloride ions to form a passive film, so that the corrosion of reinforcing steel bars and the invasion of the chloride ions into concrete are inhibited, and the durability of the concrete is improved; by regulating and controlling the mixing ratio of the four mineral admixtures and the mixing amount of the synthetic fiber component, the concrete can well consider high strength, high ductility, high durability, high flow state and excellent deformation resistance. The ultrahigh-ductility concrete for ocean engineering, which can meet the toughness requirements of high compression resistance, fracture resistance and impact resistance and the requirements of high chloride ion permeation resistance and steel bar corrosion resistance, can be obtained.

The invention belongs to the technical field of oil and gas development, and particularly relates to an oil and gas well blocking remover and a preparation method thereof. The blocking remover comprises the following components: 5-8% of low-carbon composite organic acid, 5-7% of fluoboric acid, 6-9% of ammonium bifluoride, 4-6% of an anti-acid sludge mutual solvent, 2-4% of a corrosion inhibitor, 2-4% of polyoxypropylene polyoxyethylene propylene glycol ether, 8-12% of a permeation dispersion surfactant, 2-5% of a sulfur dissolving agent, 2-5% of a stable chlorine dioxide solution and the balance of water. The preparation method comprises the following steps: adding the low-carbon composite organic acid, the fluoboric acid and the ammonium bifluoride into water and stirring; adding an acid sludge resisting mutual solvent and a sulfur dissolving agent, and stirring; adding the corrosion inhibitor, the polyoxypropylene polyoxyethylene propylene glycol ether and the permeation dispersion surfactant, and stirring; and finally, reducing the stirring speed, adding the stable chlorine dioxide solution, and stirring to uniformly mix. The blocking remover provided by the invention is comprehensive in blocking removal function, very good in dissolving and dispersing performance on complex blocking substances, very small in corrosion damage to a shaft pipe wall and wide in applicability.

The invention belongs to the technical field of water treatment, and discloses a green and environment-friendly pH-responsive corrosion inhibitor as well as a preparation method and application thereof. The corrosion inhibitor comprises the following raw materials in parts by mass: 25-30 parts of green tea polyphenol, 10-15 parts of graphene oxide nanosheets, 15-25 parts of pH response type polymer corrosion inhibition microcapsules, 5-10 parts of a beta-cyclodextrin / corrosion inhibition salt inclusion compound, 5-10 parts of an amino acid derivative polymer, 3-5 parts of a thickening agent, 180-450 parts of a solvent, and an antioxidant accounting for 0.01-0.05% of the total mass of the raw materials. And a pH regulator is added to regulate the pH of the corrosion inhibitor to 7-8. According to the corrosion inhibitor, plant extracts and non-toxic chemical substances are adopted as main components, the requirements of environment-friendly materials are met, and under the synergistic effect of all the components, the corrosion inhibitor can keep stable in a high-temperature, oxygen-containing and high-salinity environment, and anti-corrosion protection can be provided for a long time.

The invention provides a long-acting rust converting agent for metal surfaces, and relates to the technical field of marine metal surface rust prevention and conversion, tannic acid, gallic acid and salicylic acid are matched with each other and can form a firm complex layer with formed metal oxide or metal through chelation, and the metal surface rust conversion effect is improved. The synergistic effect of the tannic acid corrosion inhibitor, the gallic acid corrosion inhibitor and the salicylic acid corrosion inhibitor enhances the exertion of the synergistic migration protection effect, a relatively compact and smooth conversion film can be formed on the rusted metal surface, the formed conversion film can effectively prevent a corrosion medium from permeating into the metal surface to make contact with the metal, and the metal corrosion inhibitor is suitable for steel structures, especially suitable for steel structure connecting parts and has good corrosion resistance and corrosion resistance. The rust remover has the advantages that the rust remover is good in permeability and high in rust conversion efficiency, harmful rust can be converted into a protective layer beneficial to corrosion prevention, effective protection is provided for a metal matrix, the corrosion prevention effect can reach 20 years or above, frequent maintenance is omitted, resources, manpower and material resources are saved, and remarkable economic benefits are achieved.

The invention relates to a copper-molybdenum-titanium etching solution as well as a preparation method and application thereof. The copper-molybdenum-titanium etching solution comprises a main agent, the main agent is prepared from organic acid, a fluorine-containing compound, a surfactant, organic alkali, a corrosion inhibitor, hydrogen peroxide and deionized water. The copper-molybdenum-titanium etching solution provided by the invention does not contain phosphorus, the cost and environmental protection risk in a wastewater treatment link are greatly reduced, and meanwhile, the copper-molybdenum-titanium etching solution contains low fluorine, so that the etching solution has good etching activity, corrosion to equipment is effectively reduced, a powerful guarantee is provided for stable operation of production, and the copper-molybdenum-titanium etching solution is suitable for industrial production. And meanwhile, the safety of an operation environment is improved. Especially, under the condition of low hydrogen peroxide content, the copper-molybdenum-titanium etching solution shows excellent etching performance. In addition, the etching solution also has long copper service life, can effectively inhibit the negative influence of copper ions on the etching performance, prolongs the effective service time of the etching solution in a high copper content state, greatly reduces the replacement frequency of the etching solution, reduces the production cost, and improves the production efficiency.

The invention relates to the field of coatings, in particular to an industrial anticorrosive coating and a preparation method thereof. The coating comprises film-forming resin, a curing agent, a solvent and an anti-corrosion composite nanofiller. The anti-corrosion composite nanofiller has a three-layer structure, wherein an inner core is mesoporous silica loaded with an organic corrosion inhibitor; the middle shell layer is an amino-functionalized metal organic framework material grown in situ; and the outer layer is a low-surface-energy layer formed by modification of a hydrophobic modifier.

The invention relates to the technical field of petrochemical engineering, and particularly discloses a preparation method of a high-sulfur and high-acid crude oil demulsifier, which comprises the following steps: uniformly mixing 40-60 parts by mass of modified polyether, 25-30 parts by mass of zwitterionic surfactant and 10-12 parts by mass of solvent, heating to 50-70 DEG C, reacting for 1-2 hours, and cooling to room temperature to obtain the high-sulfur and high-acid crude oil demulsifier. Adding 3-8 parts by mass of activated aluminum oxide, 8-16 parts by mass of an antacid and 2-4 parts by mass of a corrosion inhibitor, uniformly mixing, adding 0.5-1 part by mass of a defoaming agent, uniformly mixing, cooling, and standing for layering to obtain a demulsifier; the antacid comprises ethanolamine and zinc oxide. The demulsifier prepared by the invention not only has excellent performance in the aspects of dehydration and promotion of oil-water separation, but also can improve the quality of crude oil and reduce the acid value and the sulfur content to a certain extent.

The invention discloses an MXene-based coating with a near-infrared light induction interaction effect and a preparation method of the MXene-based coating, and relates to the technical field of coatings. The preparation method comprises the following steps: a nano microcapsule and MXene powder are subjected to in-situ growth to form a composite dispersion liquid, the nano microcapsule is of a core-shell structure, a shell layer material is selected from at least one of polyaniline, polyurea, polyurethane, polyacrylate and silicon dioxide, a core contains a functional substance, and the surface of the core contains a porous material. The functional substances are selected from at least two of a corrosion inhibitor, a fluorescent indicator and a lubricant; adding a thermal reversible coating containing dynamic covalent bonds and a curing agent into the composite dispersion liquid, and uniformly mixing to form a homogeneous coating; and spraying the homogeneous coating on the surface of a base material, and curing to obtain the coating. The coating is high in mechanical strength, has a near-infrared light triggered self-repairing function, is high in self-repairing rate, and can realize multiple functions such as fluorescence labeling, corrosion early warning and lubrication coordinated regulation and control.

The present application relates to the technical field of solder paste. The present application discloses a high-precision nano solder paste and a preparation method thereof. The high-precision nano solder paste comprises solder powder, flux, glucomannan and polyethylene glycol modified aliphatic epoxy resin; the raw material composition of the flux comprises: an active agent, a surfactant, a thixotropic agent, an antioxidant, a corrosion inhibitor, a film former and a solvent. The preparation method comprises the following steps: stirring and mixing the active agent and the solvent to prepare a premixed liquid; adding a surfactant, a thixotropic agent, an antioxidant, a film former and a corrosion inhibitor to the premixed liquid in sequence, stirring and mixing to prepare a flux; mixing and stirring the solder powder, flux, glucomannan and polyethylene glycol modified aliphatic epoxy resin, grinding and preparing a high-precision nano solder paste. The high-precision nano solder paste prepared in the present application has good storage stability, long service life, high expansion rate and good wetting performance.

The invention discloses oil-based cooling liquid for a data center and a preparation method of the oil-based cooling liquid, and relates to the technical field of liquid coolant.The oil-based cooling liquid is prepared by taking base oil as a main component, adding a proper amount of heat-conducting filler, a dispersing agent, a coupling agent, an antioxidant, a corrosion inhibitor and a defoaming agent as auxiliary components and simply stirring and mixing; the cooling liquid is high in heat dissipation efficiency, good in fluidity, good in storage stability and chemical stability, low in volatility, high in safety and suitable for immersed cooling of the data center.

The invention relates to the technical field of corrosion resistance, in particular to a corrosion-resistant and wear-resistant copper insert and a preparation method thereof.The copper insert is subjected to plating treatment in an ionic liquid electroplating mode, then the surface of a plating layer is subjected to hole sealing treatment, and a nickel-copper-composite halloysite nanotube layer is electrically deposited on the surface of the formed copper insert; the preparation method comprises the following steps: taking a halloysite nanotube as a nano loader of a corrosion inhibitor, and coating with dopamine to obtain a composite halloysite nanotube; in the hole sealing liquid, the composite halloysite nanotube is used as a filler, silane modified polyurethane is used as a base material, the silane modified polyurethane is a prepolymer synthesized by using isophorone diisocyanate and polytetramethylene ether glycol as raw materials, octylamine ring-opened 3-(2, 3-epoxypropoxy) propyltrimethoxysilane is used as a chain extender, and the silane modified polyurethane is used as the base material. And 2-(perfluorodecyl) ethanol and aminopropyltriethoxysilane are used as end-capping reagents, so as to prepare the high-temperature-resistant coating.

The invention discloses an antibacterial corrosion-resistant coating and a preparation method thereof, and relates to the field of coating materials. The coating is prepared from the following components in percentage by mass: 2 to 5 percent of nano silver ion loaded mesoporous silicon dioxide nano particle antibacterial aid, 5 to 10 percent of zinc powder-containing corrosion inhibitor, 3 to 8 percent of nano montmorillonite, 30 to 40 percent of modified epoxy resin, 20 to 30 percent of polyurethane prepolymer and other aids. The nano silver ion antibacterial auxiliary agent is loaded in mesoporous silica nanoparticles through an ion exchange method, the zinc powder corrosion inhibitor is prepared through stirring and ball milling dispersion, and the modified epoxy resin is modified by adopting a silane coupling agent. The preparation process of the coating comprises the stages of premixing, grinding and refining, initiating polymerization and post-treatment, wherein a grinding medium is zirconium oxide beads with the diameter of 0.5-2 mm. The coating has excellent antibacterial and corrosion-resistant performance, is suitable for metal surface protection, and can effectively solve the problems that an existing coating is not lasting in antibacterial effect, insufficient in corrosion-resistant performance and not ideal in comprehensive performance.

The invention provides an electrolytic etching solution, an electrolytic etching method, a metal-plastic composite material and electronic equipment, and the electrolytic etching solution comprises 5-20 wt% of bromide, 1-10 wt% of inorganic acid, 1-5 wt% of a complexing agent, 0.1-5 wt% of a wetting agent, 1-10 wt% of a corrosion inhibitor, 1-5 wt% of conductive salt and 60-75 wt% of a solvent on the basis of the total mass of the electrolytic etching solution. The bromide, the inorganic acid, the complexing agent, the wetting agent, the corrosion inhibitor, the conducting salt and the solvent are efficiently compounded, and the metal material surface treatment agent can be used for metal material surface treatment.

The invention relates to the technical field of polishing solutions, in particular to an efficient and environment-friendly chemical polishing solution and a preparation method thereof. The chemical polishing solution comprises the following raw materials in percentage by weight: 5%-8% of a nano metal abrasive, 2%-4% of a silicon oxide abrasive, 2%-10% of an oxidizing agent, 1%-5% of a complexing agent, 0.05%-0.5% of a corrosion inhibitor and the balance of deionized water. The chemical polishing solution further comprises a pH regulator, and the pH of the chemical polishing solution is regulated to 7.5-8.5 by adopting the pH regulator. The chemical polishing solution disclosed by the invention adopts environment-friendly raw materials, shows a good polishing effect when being used for precision machining of the monocrystalline silicon wafer, and is high in material removal efficiency, and the polished silicon wafer is smooth in surface and free of damage.

A preparation method for a lithium manganese iron phosphate positive electrode material, comprising the following steps: (1) uniformly stirring an iron source, a phosphorus source, a lithium source and a dispersing agent in water, adding a manganese source, and uniformly mixing same to obtain a precursor pre-slurry; and (2) adjusting the solid content of the precursor pre-slurry to reach a target solid content A, the target solid content A satisfying 30 wt% ≤ A ≤ 60 wt%; (3) carrying out primary grinding treatment on the precursor slurry obtained in step (2); and (4) adding an organic phosphine scale and corrosion inhibitor to the precursor slurry, dissolving same, then drying the obtained slurry, and performing sintering and crushing to obtain the lithium manganese iron phosphate positive electrode material. Also provided is a positive electrode material prepared by the method.

The invention relates to an oilfield underground slow-release scale and corrosion inhibitor and a production process thereof, and aims to solve the problems of scaling and corrosion caused by water injection in the oilfield exploitation process. According to the scale and corrosion inhibitor, various components such as the inorganic salt, the organic corrosion inhibitor and the natural plant extract are compounded, and a production process is combined, so that excellent properties such as long-acting slow release, efficient scale and corrosion inhibition, sterilization and algae removal, environmental protection and degradability are realized. The production process comprises the steps of raw material preparation, mixing reaction, melting homogenization, cooling forming, annealing treatment and the like, and stable performance and reliable quality of the scale and corrosion inhibitor are ensured by controlling process parameters of each step. The scale and corrosion inhibitor disclosed by the invention has obvious long-term effect, the workload of frequent addition and maintenance can be reduced, and the production cost is reduced; the environment-friendly and degradable characteristics meet the modern environment-friendly requirements, and the ecological environment can be protected. In addition, the scale and corrosion inhibitor has good adaptability and can adapt to different oil field geological conditions and fluid property differences.

Disclosed herein are solid-liquid bi-phase lubricating devices that can include a cuboidal shaped stick with at-least one cylindrical or cuboidal shaped hollow core running through entire or partial length of the stick. The cuboidal shaped stick can include a solid polymer-based composite while the inner space is filled with a semi-fluid grease lubricant. The solid polymer-based composite can include one or more polymers, filler materials, corrosion inhibitors, plasticizers, and additives. The grease lubricant can include lithium, lithium-complex, aluminum-complex, calcium-sulphonate complex, bentone-thickened grease, and mixtures thereof and have an NLGI consistency grade≥1. The lubricating devices can be used for friction reduction of mechanical components involving two or more contacting surfaces in relative motion, such as a steel wheel flange-rail contact interface of transit and freight rail transport systems.

A corrosion inhibitor composition includes a fatty acid ethoxylate, a thiourea, an arylthiourea, a thiazole, and two or more solvents. A metal article in contact with the composition has a corrosion rate of about 25 to about 45 mils penetration per year (mpy), as determined by an ASTM G111 standard test method. A method for inhibiting corrosion of a metal in contact with a corrosive fluid.

The invention provides a hyperbranched polysiloxane coating corrosion inhibitor and a preparation method thereof, a hyperbranched polysiloxane epoxy anticorrosive paint and a preparation method and application thereof. The hyperbranched polysiloxane coating corrosion inhibitor is prepared by catalytic reaction of p-dimethylaminobenzaldehyde and small molecular silane in an alcoholic solution. The coating comprises 30-50 parts of epoxy resin, 20-35 parts of a hyperbranched polysiloxane coating corrosion inhibitor, 5-10 parts of an active diluent, 2-2.5 parts of a silane coupling agent, 15-30 parts of filler, 1.5-2.5 parts of an auxiliary agent and 15-20 parts of a curing agent. Compared with the prior art, an imine group in hyperbranched polysiloxane and a metal substrate form a stable complex, the stable complex is adsorbed on the metal surface to form a protective film, the erosion rate of a corrosive medium to the metal substrate is effectively reduced, the corrosion resistance of a coating is improved, meanwhile, the coating prepared by adopting the reactive diluent is high in solid content and good in corrosion resistance, and the service life of the coating is prolonged. VOC emission in the paint film curing process is low.

The invention discloses a nano cold-rolled automobile sheet surface silane composite pretreatment agent and a preparation method thereof. The composite pretreatment agent comprises the following components: a nano silane compound, an organic solvent, an acid catalyst, a surfactant, a corrosion inhibitor, a stabilizer, a defoaming agent, a preservative, a complexing agent, a thickening agent, a dispersing agent, a pH regulator, deionized water and the like. According to the method, a nanotechnology is combined with a silane compound, the silane compound is uniformly dispersed in a solvent by utilizing high specific surface area and high reaction activity of a nanomaterial to form a stable pretreatment agent, the preparation method is simple, convenient and suitable for industrial production, and meanwhile, the defects of a traditional surface pretreatment method are overcome; the method has the advantages of environmental protection, high efficiency and stability. The pretreatment agent not only can improve the surface quality of the cold-rolled automobile sheet, but also can provide good adhesive force and corrosion resistance for a subsequent coating, and prolongs the service life of the coating.