34results about How to "Protection against corrosion" patented technology

The invention relates to a normal temperature spraying detergent for aluminum alloy and a preparation method thereof. The detergent comprises the following raw materials in percentage by weight: 1 to 5 percent of ethylene diamine tetraacetic acid, 0.5 to 1.5 percent of sodium metasilicate pentahydrate, 5 to 8 percent of sodium gluconate, 5 to 10 percent of heterogeneous alcohol ether, 2 to 7 percent of solubilizing agent, 3 to 8 percent of surfactant, and the balance of water. The detergent can be used at normal temperature, and does not need heating so as to save the energy; the detergent does not corrode the treated aluminum alloy parts, does not leave white spots on the surfaces of the parts, and can increase the brightness of the parts; and the detergent has long service life and low using concentration, is safe and environment-friendly, saves the working time, and improves the working efficiency.

The invention discloses a special water-based cleaning agent for aluminum magnesium alloy. The special water-based cleaning agent comprises the following raw materials in parts by weight: 1-6 parts of triethanolamine, 2-10 parts of sodium carbonate, 5-10 parts of sodium bicarbonate, 4-12 parts of heterogeneous alcohol ether, 6-20 parts of alkylolamides, 5-15 parts of a magnesium alloy corrosion inhibitor, 5-10 parts of an aluminum alloy corrosion inhibitor, 8-20 parts of an anionic surfactant, 3-10 parts of hydrophilic alcohol, 0-6 parts of a stabilizer and 50-100 parts of water. The special water-based cleaning agent for aluminum magnesium alloy disclosed by the invention is strong in detersive power, high in cleaning speed, few in residues after being washed, anti-static, and good in corrosion inhibition property, and can prevent the metal from being corroded.

The invention relates to an engine coolant composition, and a method of increasing the operational life of a coolant composition in an engine, wherein an isononanoic acid is incorporated into the generally glycol based coolant fluid in place of nitrous acid or its salt to reduce pitting corrosion on iron containing surfaces.

The invention relates to a high-impermeability cement-based composite material and a method for preparing the same. The high-impermeability cement-based composite material comprises, by weight, 20-30parts of 525 white cement, 40-60 parts of quartz sand, 18-20 parts of titanium dioxide powder, 10-12 parts of fly ash, 5-15 parts of chitosan nanogel, 3-5 parts of polyacrylate emulsion, 1-10 parts ofpitchstone vitrified micro-spheres, 0.5-2 parts of PVA (polyvinyl alcohol) celluloses, 6-8 parts of ionic liquid, 10-12 parts of crop straw powder, 3-6 parts of clay, 3-5 parts of diatomaceous earth,3-5 parts of maleic anhydride, 1-3 parts of whiskers, 3-6 parts of silane coupling agents, 0.5-2 parts of cellulose ether, 0.3-2 parts of redispersible latex powder, 0.1-3 parts of superplasticizers,0.5-2 parts of inorganic pigment and 60-70 parts of water. The method includes preparing composite materials from the maleic anhydride, the clay, the diatomaceous earth and the PVA celluloses; mixingand stirring the composite materials and other raw materials with one another to obtain the high-impermeability cement-based composite material which is a product.

A method is provided for producing metal housings composed of at least two housing parts, in particular for units mounted in commercial vehicles. A corrosion prevention layer composed of zinc or a zinc-containing alloy is applied onto an outwardly facing surface of at least one housing part with a subsequent passivation, and a positive overlapping of an edge of one housing part by the edge of another housing part is effected by way of a relative movement of the housing parts being reciprocally aligned beforehand with regard to a die stamp, which plastically deforms the edge of housing part and/or the edge of the other housing part.

The invention discloses a ceramic coating material with characteristics of high-temperature resistance, high blackness, coking resistance and corrosion resistance, wherein the ceramic coating materialcomprises a binder, a filler, an auxiliary agent and water, the binder comprises, by mass, 7-15% of silica sol, 5-7% of styrene-acrylic emulsion, 1-3% of sodium oxide, and 3-5% of alumina monohydrate, and the filler comprises, by mass, 2-5% of zirconia, 1-3% of iron oxide red, 1-3% of silicon nitride, 0.2-0.5% of titanium nitride, 1-3% of magnesium oxide, 3-6% of chromium oxide, 1% of alumina, 0.5-1% of copper oxide, 5-7% of kaolin, 1.9-2.5% of mica powder, 0.5-0.7% of sodium-based bentonite, 1-3% of cerium oxide, 1-3% of neodymium oxide, 1-3% of lanthanum oxide, 1-3% of yttrium oxide, 0.2-0.4% of molybdenum oxide, and 1-3% of niobium oxide.

The invention discloses a silt stripping method for a circulating cooling water system, which comprises the following steps of: preparing a silt stripping auxiliary agent by using sodium dodecyl benzene sulfonate, triethanolamine, polydimethyl silicon ether, sodium polyacrylate and water, adding the silt stripping auxiliary agent into cooling water in a ratio of 400 to 500mg/L for one-time circulation, adding a strong oxidizing agent into the normal circulating cooling water in a ratio of 2,000 to 3,000mg/L, and injecting clear water into the cooling water while circulating when the turbidity reaches a peak value to displace suspended matters in the cooling water. The consumption of the strong oxidizing agent is relatively reduced by 40 to 60 percent, the washing rate reaches over 99 percent, and the service life of the circulating cooling water system is prolonged, so the silt stripping method for the circulating cooling water system has the advantages of low strong oxidizing agent consumption, low metal pipeline corrosion, high washing rate, safe system operation and capability of prolonging the service life of the system.

The invention relates to the technical field of pipeline laying and provides water application pipeline laying facility which comprises a first water retaining wall mounted at an entrance port of a sleeve, wherein a pipeline-through hole for penetrating into a pipeline is formed in the first water retaining wall. When the water application pipeline laying facility is applied to pipeline laying, after the end part of the to-be-laid pipeline penetrates into the pipeline-through hole in the first water retaining wall, liquid can be injected into a liquid accommodating chamber. At the moment, the pipeline entering the sleeve undergoes vertical upward buoyancy, then the acting force for a pipeline laying process is reduced, the requirements on the laying equipment as well as the operation complexity are lowered, the construction safety and laying speed are improved, and the pipeline is laid in place for sure. Moreover, since a support member is mounted in advance and then drives the pipeline to enter the sleeve, the damage and deformation of the support member can be prevented; meanwhile, the frictional resistance against the pipeline is reduced under the buoyancy, and thus the pipeline is effectively protected from outer corrosion.

The invention relates to a device for recycling strong brine for steel slag hot-disintegration treatment and a treatment method, and belongs to the technical field of environmental protection. The strong brine of an iron and steel enterprise is directly conveyed to the steel slag hot-disintegration water return well through a centrifugal pump, reacts with hot-disintegration water return alkali liquor and then is lifted by a slurry pump to enter a hot-disintegration settling pond to be quickly settled, supernate automatically flows into a steel slag hot-disintegration water suction well, and sludge in the settling pond enters a secondary steel slag treatment production line after being concentrated and dehydrated. A scale inhibition and dispersion agent is added into the hot-disintegrationwater suction well to prevent a hot-disintegration water system from scaling, and dust and steam generated in the steel slag hot-disintegration process are collected through a gas collecting hood to be treated. According to the device and the treatment method, the iron and steel enterprise can treat the strong brine with the lowest cost, and the strong brine is consumed.

The invention provided with a high temperature dust collector. The high temperature dust collector comprises a body (1) and an air chamber (2) arranged in the body (1), a fan (3), an air inlet pipe (4), an air outlet pipe (5) and a metal screen (6), wherein the air inlet pipe (4), the air chamber (2), the fan (3) and the air outlet pipe (5) are successively connected, and the metal screen (6) is arranged between the air inlet pipe (4) and an air inlet of the air chamber (2). The high temperature dust collector provided by the invention has the characteristics that a filter bag which is made of a metal material is adopted to replace the traditional filter bag, the high temperature dust collector is high temperature resistance and is easy to clean, and the application range is wide.

The invention relates to a preparation method of a core-shell type ceramsite fracturing propping agent for oil and gas collection, which comprises the following steps: (1) grinding municipal sludge containing organic matters into powder, and then granulating and drying to obtain a core precursor; (2) uniformly mixing clay and scrap iron powder, then adding water, and uniformly stirring, so as to obtain inner coating layer slurry; and (3) mixing clay and water, and uniformly stirring to obtain the outer coating layer slurry. And (4) immersing the inner core precursor into inner coating layer slurry to uniformly coat the outer surface of the inner core precursor, then taking out the inner core precursor, drying, then immersing the obtained particles into outer coating layer slurry again to uniformly coat the outer surface of the inner core precursor, then taking out the particles, drying, uniformly placing the particles, and then calcining to obtain the composite material. The ceramsite fracturing propping agent is obtained after completion. The core-shell type fracturing propping agent disclosed by the invention is low in density and has good compression resistance, and the purposes of reducing the density of the fracturing propping agent and keeping the good compression resistance of the fracturing propping agent are achieved.

A steel pipe comprises a first through pipe, a second through pipe and a third through pipe. The first through pipe and the second through pipe are arranged on the same horizontal line, the first through pipe and the second through pipe are arranged at two ends of the third through pipe respectively, an axial lead of the first through pipe and an axial lead of the second through pipe are the same line, an axial lead of the third through pipe is perpendicular to the axial lead of the first through pipe, and paint is sprayed on the outer lateral walls of the first through pipe, the second through pipe and the third through pipe. By spraying paint at low cost on the outer lateral walls of the first through pipe, the second through pipe and the third through pipe evenly, the steel pipe is protected from corrosion, manufacturing cost is reduced, and the steel pipe is easy to manufacture.

The invention relates to a viscoelastic body corrosion prevention method for a pipe fitting in a narrow space. The method comprises the steps that rust is manually removed, clear water flow is used for removing superficial filth on the pipe fitting, the pipe fitting is dried with hot air to achieve a water-vapor-free condition, viscoelastic body coating is painted, PE protective tape is wound, bolt corrosion prevention is conducted, corrosion prevention is conducted on special dissimilar parts, and colored paint is painted according to standardized specifications. The method can solve the problem that mechanical rust removal is unavailable in a workplace where the operation space is narrow. Furthermore, the viscoelastic body material has excellent adhesive property, is high in chemical resistance, ageing resistance and weather resistance, has good cold flow property, self-repairing function and electric insulation performance, and is safe and environment-friendly.

The invention discloses a novel compound fertilizer centrifugal granulating device. The novel compound fertilizer centrifugal granulating device comprises a compound fertilizer granulating device bodyand a temperature control device, wherein the temperature control device is arranged in the middle part of the interior of the compound fertilizer granulating device body, and is fixedly connected with the compound fertilizer granulating device body; an outer casing of a granulating machine is arranged at the surface of the compound fertilizer granulating device body, and is fixedly connected with the compound fertilizer granulating device body; the surface of the outer casing of the granulating machine is provided with a material outlet, and the material outlet is fixedly connected with theouter casing of the granulating machine. The novel compound fertilizer centrifugal granulating device has the advantage that the temperature control device is worked by using a power source starting press button, so that when the compound fertilizer centrifugal granulating device is used for granulating a compound fertilizer, the internal temperature of the compound fertilizer granulating device body is increased, and can be well controlled by the temperature control device, thereby preventing the scald of a user in the use process, preventing the damage to the parts in the compound fertilizergranulating device body due to overhigh temperature, and intermittently reducing the economic cost of a consumer.