207 results about "Corrosion" patented technology

A method of forming an exterior surface protective structure (12) for an aircraft (10) includes providing a surfacer (26) having a carrier on a metal mesh material (24) and an isolator (22) with resin in the surfacer and the isolator filling holes in the metal mesh to form a surface that may be covered with finishes (28), such as spray applied surfacers, primer(s) and a paint to provide a more robust structure that resists corrosion and prevents substrate microcracking, while providing rain erosion resistance, environmental durability, structural performance, and lightning protection in a lighter weight and less costly material.

The invention discloses a method for synthesizing sec-butyl alcohol. In the method, sec-butyl acetate and methyl alcohol are used as raw materials, sec-butyl alcohol is produced by ester exchange, and the by-product is methyl acetate. The yield of sec-butyl alcohol is 50-90%. Compared with the method for preparing sec-butyl alcohol by n-butene hydration, the method is high in reaction speed, high in conversion rate and selectivity, mild in reaction conditions and less in corrosion for equipment; and the by-product methyl acetate is also an important industrial raw material.

A method for preparing a silicon carbide ceramic material with low residual silicon by adopting a multi-step reaction sintering method comprises steps as follows: carbon sources are selected, the carbon sources with different activity degrees are mixed with silicon carbide powder, phenolic resin or PVA (polyvinyl acetate) is added, the materials are mixed and subjected to powder forming, siliconizing sintering and heat treatment for removing residual silicon, finally, an obtained silicon carbide product is polished, carbon and silicon condensed on the surface are removed, the coarse surface is flattened, and a qualified silicon carbide finished product is obtained. According to the method, the problem that application of a conventional reaction sintered silicon carbide ceramic material in high temperature and corrosion environments and a high temperature difference environment is limited due to higher content of residual silicon is solved, the silicon carbide ceramic material with low residual silicon and high density can be prepared, heat-conducting property, high-temperature mechanical property, Young modulus, corrosion resistance, high-temperature conductivity and other properties of the reaction sintered silicon carbide material are greatly improved, and the application range of the reaction sintered silicon carbide material is greatly enlarged.

The present invention relates to a method for resisting high-temp. oxidation and thermal corrosion for high temp. alloy, and is characterized by that firstly, a McRAlY coating layer whose thickness is 10-100 micrometers is made on the surface of high-temp. alloy base body, in which M is selected from Ni, Co, or NiCo; then and enamel coating layer whose thickness is 20-100 micrometers is fired on the surface of MCrAl Y coating layer, in which the composition of the enamel coating layer includes (wt%) SiO2 55-63, Al2O3 3.4-9.7, ZrO2 3-6, ZnO 8-12, B2O3 3-10, CaO 3-6, Na2O 3-4, rare earth RuO, CeO and Y2O3 1-2 and the rest is MgO, NiO and CoO.

The invention discloses a manufacturing method for a high-vanadium high-speed steel composite roll suitable for a narrow strip rolling mill. The manufacturing method comprises the steps that an outer layer of a roll body is poured by adopting a centrifugal pouring method, and after the outer layer of the roll body is poured with high-vanadium high-speed liquid steel, inert gas is continuously pumped into a cavity of the outer layer of the roll body; a centrifuge stops rotating when the outer layer temperature of high-vanadium high-speed steel reaches 1220-1280 DEG C, the inert gas is stopped being blown in, and then liquid iron in the core of the roll body is poured through mould closing. According to the manufacturing method for the high-vanadium high-speed steel composite roll, the bonding rate of the high-vanadium high-speed steel of the outer layer and the liquid iron in the core is significantly improved, the binding rate is improved from 40 percent to 100 percent, the bonding strength is improved from about 350 Mpa in the past to about 450 Mpa, and therefore the anti-stripping performance of a roll body bonding layer of the high-vanadium high-speed steel roll is greatly improved; meanwhile, the element amount formed by carbide on the corrosion outer layer of the liquid iron of the core is removed, therefore, roll neck tissues are improved, the tensile strength of the roll neck is improved, and the roll breakage phenomenon in use is effectively and completely eradicated.

A method for predicting corrosion in a pipeline wherein the pipeline is subject to corrosion by the steps of obtaining data of parameters associated with the pipeline, comparing the data against previously generated data of parameters associated with the pipeline, and calculating, based on differences between the data with the previously generated data the probability of corrosion in the pipeline. The calculation can be performed using a variety of algorithms and modeling methods.

The invention discloses a full-automatic 200L steel drum transfer type stacking system and a transfer stacking method thereof. The system comprises a PLC processing controller used for controlling the full-automatic 200L steel drum transfer type stacking system to automatically operate, and is characterized by further comprising a drum grabbing device used for grabbing a material drum and then placing the material drum into the next procedure, a tray conveying device used for conveying the material drum to the next procedure, and a tray prestoring separation device used for separating the material drum from a tray, wherein the drum grabbing device, the tray conveying device and the tray prestoring separation device are all connected with the PLC processing controller. The full-automatic 200L steel drum transfer type stacking system has the advantages of being free of manual operation, pollution-free, and resistant to corrosion and a high temperature, and achieving unmanned operation of automatic transfer stacking operation on inflammable, highly toxic and highly corrosive operating sites.

The high strength compact zirconia-chromia corundum brick is produced with corundum, zirconia material, chromia material and binding agent. The material consists of compact corundum 10-80 wt%, brown corundum 0-60 wt%, zirconia material 1-25 wt%, chromia material 3-40 wt% and binding agent 1-12 wt%. The high strength compact zirconia-chromia corundum brick has high strength high heat shock stability, high slag corrosion resistance and high heat resistance.

An edge of an aluminum 5xxx series sheet is welded to another aluminum 5xxx series sheet utilizing a low magnesium content aluminum alloy filler. The bottom weld seam metal is heat dressed as by a TIG and subsequently the bottom and the top, are planished to the same thickness as the sheets. Favorable properties such as the elimination of nail heads, improved corrosion resistance, and bendability are obtained.

The invention provides an organic and inorganic composite aluminium alloy non-chromium passivation treatment fluid, pertains to the field of metal materials, relates to a problem of treatment of metal material surface, and in particular to a passivation treatment fluid which can improve the corrosion resistance of the aluminium alloy surface and does not contain hexavalent chromium. The passivation treatment fluid is characterized in that organic resin such as waterborne acrylic resin, polyurethane or the like is adopted as a film forming agent, and a ferrate inorganic passivating agent, a stabilizing agent and a curing agent are added to prepare an organic and inorganic composite passivation solution; the concentration weight percentages of the components in the passivation solution are as follows: 10 to 25 percent of organic resin film forming agent of waterborne acrylic resin or polyurethane, 0.01 to 2 percent of ferrate inorganic passivating agent, 0.05 to 5 percent of sodium silicate passivation solution stabilizing agent, and 0 to 5 percent of curing agent; phosphoric acid is used for adjusting the pH value to 4-6; and the balance is deionized water. The method of roll coating, dip coating or the like is adopted for evenly coating the passivation solution on the surface of the aluminium alloy, then non-chromium passivation film with good corrosion resistance is obtained after curing at the temperature above 80 DEG C, and the passivation solution meets the requirement of environment protection.

The invention provides a lubricating grease composition for elevator wire ropes, which comprises the following components in parts by weight: 50-80 parts of base oil, 5-10 parts of thickener, 10-35 parts of microcrystalline wax, 2-7 parts of nano silicon dioxide, 1-3 parts of oleic acid, 3-7 parts of alkyl diphenylamine, 1-3 parts of barium petroleum sulfonate and 2-5 parts of borate. The lubricating grease composition has the characteristics of high permeability, low bleeding tendency, oxidation resistance, corrosion resistance, rust resistance and the like.

The invention provides a method for effectively restraining generation of sulfur trioxide and waste acid in smelting smoke. By adjusting smoke temperature, and/or controlling the wind leakage amount of a smoke flue, and/or reducing the water content of materials and the sulfate content, generation of the sulfur trioxide and the waste acid in the smoke is restrained. By adjusting parameters such as the smoke temperature, the wind leakage amount, the water content and the sulfate content, generation of the sulfur trioxide and the waste acid is restrained, and compared with the prior art, the method has the beneficial effects that the cost is low, operation is easy, other compounds are not introduced, and generation of the sulfur trioxide and the waste acid in the smoke is restrained from source. The method can be applied to the smoke waste heat recovery and treatment link in the copper sulphide concentrate oxygen enrichment matte smelting process, generation of the sulfur trioxide and the waste acid in the smoke is restrained, and then the problems of corrosion to the smoke flue and waste acid are relieved.

The invention relates to the field of rail transportation and machinery manufacturing, and particularly to a composite welding method of a pillow beam, the pillow beam and a rail vehicle with the pillow beam. The method comprises the following steps that laser-MAG composite welding is used for welding the pillow beam of the stainless steel material, and inserted-connected structures of rib plates are optimized; during manufacturing, the rib plates are preassembled and welded to form a rib plate assembly, then the whole structure is welded, so that the pillow beam can adopt to the stainless steel material to replace weathering resistant steel material in whole, the lightweightening of the pillow beam is achieved, and the corrosion resistance of the pillow beam is improved; through the welding modes of inserting connection and corner connection, and a to-be-welded welding seam is placed on the outer surface of a box type structure to adapt to a technology of single-face welding double-face forming of the laser-MAG composite welding; and self-restraint of pillow beam welding is achieved through the self-stiffness of the inserted-connected structures, the advantages of the laser-MAG composite welding of deep welding, low heat input, small welding deformation and good gap adaptability are played, a manufacturing technology without adjustment and repair of the stainless steel pillow beam is achieved, so that the manufacturing and processing efficiency of the rail vehicle are improved, and production cost is reduced.

The invention discloses a cleaning fluid applied for automatic biochemical analyzers, comprising: at least one anion surface active agent, at least one nonionic surface active agent, an alkali metal hydroxide, an alkali metal citrate and a buffer agent for stabilizing pH value above 13.0. The cleaning fluid has low protein residual rate, low fatty material residual rate, good in-batch repeatability, low cross pollution and low reactant deposition rate in clinical application after cleaning. And the cleaning fluid will not affect the test result of biochemical analyzers, and has not corrosion on the liquid circuit system and reaction cup of analyzers. All components of the cleaning fluid can be degraded biologically, to avoid potential environment pollution and meet environment protection requirement.

The present invention relates to the technical field of water-based coatings, and in particular relates to good-weather and water resistance water-based alkyd resin, alkyd resin is obtained by fatty acid method, and by reaction of epoxy groups of epoxy organosiloxane and alcoholic hydroxyl groups and carboxyl groups of an alkyd resin molecular chain, organosiloxane chain segments are introduced into the water-based resin system for synthesis of the water-based epoxy organosiloxane-modified alkyd resin with excellent water resistance, stain resistance, weather resistance, smoothness and corrosion resistance. An epoxy organosiloxane monomer contains a methoxysilane inorganic active functional group, silicon hydroxyl formed by hydrolysis of the functional group may be condensed with inorganic material surface hydroxyl to improve the water-based alkyd resin adhesion to a metal, glass and plastic substrate, meanwhile by the introduction of the organosiloxane chain segments into the alkyd resin branched portion, the drying properties, weather resistance, heat resistance and water resistance of the water-based alkyd resin can be greatly improved.

The invention provides an alloying component and a preparation method thereof. The alloying component takes high-entropy alloy as a matrix, and uses a carbon nano tube and rare earth nano particles asreinforcements, wherein the expression of the atomic percent of the high-entropy alloy is LxMyNz(Fe2/3Nb1/6Ta1/6)100-x-y-z; L comprises at least one of B, Mg, Al, Si, Sr, Ga, Ge, Sn, Sb and Bi; M comprises at least one of Cu, Co, Cr, Ni, Mn, Ag, Zn, V, Ti, Zr, Mo, Hf and W; N comprises at least one of Er, Y, Sc, Nd, Dy, Tm and Gd; and x is larger than or equal to 0 and smaller than 100, y is larger than or equal to 0 and smaller than 45, z is larger than or equal to 0 and smaller than 10, and the sum of x+y+z is larger than or equal to 0 and smaller than 100. The invention can provide the alloying component which refines grains to enables material compositions to be distributed more uniformly, and improves the grain boundary performance and the grain boundary corrosion resistance and thepreparation method of the alloying component.

A process for preparing thermoplastic polyamide compositions that exhibit decreased melt flow and similar physical properties in comparison with conventional systems, in which polyamide is melt-blended with at least one organic acid, and, optionally, one or more additional components, such that the organic acid has a melting point that is no lower than about 10° C. less than the onset temperature of the melting point endotherm of the polyamide. The process results in decreased levels of corrosion and erosion of standard processing equipment in comparison with other processes for decreasing the melt flow while maintaining the physical properties of thermoplastic polyamide compositions. Articles of manufacture made according to the instant process and composition described therein are also disclosed.

The invention relates to a method for producing high-count yarns from vinylon and polyester fibers, and cotton by blending. Vinylon and polyester, and cotton fibers are selected. Vinylon and polyester fibers are blown, carded and pre-doubled, and then combined with cotton combed silvers on drawing, and cone yarns are produced through procedures of roving, spinning and spooling. Low speed, multi-combing and less-beating, large gauge, small-feeding and less-falling, weighing and pressurizing are adopted in a blowing procedure; large gauge, small noil, big ration, full transfer and proper combing are adopted in a cotton carding procedure; large gauge, big ration, low speed, first-pass pre-doubling and second-pass mixed drawing processes are adopted in the drawing procedure so that components are mixed uniformly; large gauge, big ration, heavy pressurizing, low speed and small twist are adopted in the roving procedure; moderate twist coefficient and low spindle speed processes are adopted in the spinning procedure. The vinylon is added in a polyester-cotton fabric, so that the polyester-cotton fabric has good moisture absorption and good gas permeability, is firm and durable, and resists acid and base, corrosion, moth damage and solarization; high-quality fine staple cotton is added in the polyester-cotton fabric, so that the polyester-cotton fabric is comfortable and soft to wear, keeps warm in wearing, and is suitable for making work clothes.

The invention discloses an acidic electroplating zinc-nickel alloy electrolyte, a preparation method and an electroplating method thereof; the electrolyte comprises a basic electrolyte and additives; the basic electrolyte is a weakly acidic solution which comprises zinc ions with mass concentration of 27-38g/L, nickel ions with mass centralization of 23-31g/L, chloride ions with mass concentration of 150-220g/L and boric acid with mass concentration of 25-35g/L at Ph value of 4.8-5.4 and at temperature of 28-35 DEG C; and the additives comprise a brightening agent of 1-12 ml/L, a walk agent of 3-30 ml/L and a disodium ethylenediamine tetraacetate complexant of 10-50 ml/L. The acidic electroplating zinc-nickel alloy electrolyte is rational in proportion and proper in matching; the galvanizing efficient is improved by 30-40% compared with the traditional acidic galvanizing; the corrosion resistance of a zinc-nickel coating can be improved remarkably and the service life of the coating is prolonged; the coating is high in hardness, corrosion resistance, abrasive resistance, pyro-oxidation resistance, compactness and comprehensive performance; the electrolyte does not need to the post-treatment technique, so that the adopted electroplating method is saved in cost, efficient and rapid, convenient in operation and far superior to the traditional alkaline zinc-nickel electroplating.

The invention discloses a preparation method of a high-entropy ceramic coating. The method comprises the following steps: firstly, mixing a plurality of single-element compound raw material powder toobtain composite powder, and then mixing a binder into the composite powder to prepare multi-element composite powder for thermal spraying, wherein the single-element compound is carbide, nitride or diboride, and the multiple elements are any five or more of zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum or tungsten; secondly, pretreating the surface of a substrateof the required coating; and thirdly, spraying the multi-component composite powder on the surface of the substrate by adopting a thermal spraying method so as to form the high-entropy ceramic coating through in-situ synthesis. The high-entropy ceramic coating prepared by the invention has high compactness, hardness, wear resistance, corrosion resistance, high-temperature resistance and oxidationresistance.

An Anode Rod Depletion Indicator for use with a sacrificial anode in a fluid storage tank. A core wire, which is arranged within the anode, has a series of hollow or fluted passageways. When the anode depletion causes a predetermined amount of the core wire to be exposed, fluid contained in the storage tank flows in the hollows or flutes of the core wire. The fluid pressurizes and activates a pressure gauge or switch, or pushes a piston up to a location, which is visible to the owner. In an embodiment, a visible indicator such as “Good” is visible on a pressure gauge until the fluid pressure indicates “Replace” on the pressure gauge or until the piston pushes up a “Replace” indicator to the need to replace anode rod, to prevent corrosion and failure of the tank, while the anode is still providing corrosion protection of the tank. An electrical switch may cut off supply fluid, fuel supply, and/or activate an alarm.