2089 results about "Corrosive substance" patented technology

The invention belongs to the field of metal materials, and particularly relates to a high-strength hot-rolled pickled steel plate for an automobile chassis and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the following chemical components: C, Si, Mn, Al, V, Ni, Cu, Cr, Pt and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.006%, and the balance is Fe and inevitable impurities. The yield strength of the steel plate ranges from 498 MPa to 552 MPa, the tensile strength ranges from 608 MPa to 643 MPa, the transverse elongation A ranges from 33% to 38%, the steel plate is qualified after transverse cold bending by 180 degrees D = a, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra ranges from 1.10 micrometers to 1.35 micrometers, and the steel plate has excellent corrosion resistance.

The invention belongs to the field of metal materials, and particularly relates to a high-elongation 288MPa-grade hot-rolled pickled steel plate for an automobile and a production method thereof. The steel plate is mainly suitable for manufacturing automobile chassis structural parts. The steel comprises the chemical components of C, Si, Mn, Al, Ti, Zr, Ni, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.003%, and the balance is Fe and inevitable impurities. The steel plate has excellent mechanical properties, the yield strength of the steel plate is larger than or equal to 238 MPa, the tensile strength is larger than or equal to 288 MPa, the transverse elongation A is larger than or equal to 48%, the hole expansion rate is larger than or equal to 132%, transverse cold bending is conducted by 180 degrees, D = a, the steel plate is qualified, the surface quality is good, oxide scale stripes and chromatic aberration defects are avoided, the surface roughness Ra is 1.08-1.48 micrometers, and the steel plate has good corrosion resistance.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention relates to a high-stability bronze powder pigment and a preparation method and application thereof.The preparation method comprises the following steps that copper-zinc alloy coarse powder, stearic acid and a dissolved compound passivator are taken and subjected to ball milling in the nitrogen atmosphere, and a ball milling product is screened, washed and subjected to suction filtration to obtain an amino-functionalized passivated base material; the preparation method comprises the following steps: dispersing SiO2 in anhydrous isopropanol to obtain a reaction system, adding deionized water and a catalyst, dissolving tetraethoxysilane and phenyltriethoxysilane in anhydrous isopropanol, slowly dropwise adding, carrying out a heat preservation reaction, and carrying out suction filtration and washing to obtain a phenyl modified SiO2 coated intermediate; the preparation method comprises the following steps: dispersing a compound stabilizer in anhydrous isopropanol to obtain a mixed system, heating and stirring, dissolving the compound stabilizer in anhydrous isopropanol, dropwise adding into the mixed system, reacting, centrifuging, washing, and drying in vacuum to obtain the bronze powder pigment. The bronze powder pigment disclosed by the invention has excellent oxidation resistance, chemical corrosion resistance and long-term storage stability, and can keep the natural color gloss of metal to the greatest extent.

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 relates to the technical field of wind power blade material testing, and discloses a testing device and method for a salt spray corrosion test of a wind power blade composite material layer. According to the method, wind power blade composite material coating preparation parameters are obtained, and coating basic information is provided for subsequent performance evaluation; based on preset salt spray test environment control parameters, dynamic salt spray environment simulation conditions are generated so as to better fit the actual outdoor environment; then, a multi-sensor coupling monitoring network is constructed, real-time data acquisition is conducted on the corrosion process of the composite material coating, and comprehensive tracking of the corrosion process is achieved; processing real-time data by utilizing a corrosion characteristic analysis algorithm, generating a multi-dimensional corrosion characteristic index, and quantitatively representing the corrosion condition of the coating; and finally, evaluating the anti-corrosion stability of the new material coating in combination with the coating characteristic parameters and the multi-dimensional corrosion characteristic indexes. According to the method, the corrosion resistance of the coating in the actual environment can be more accurately reflected, and support is provided for research, development and application of the composite coating of the wind power blade.

The invention discloses a method for quantitatively evaluating the CMAS corrosion resistance of a thermal barrier coating, which comprises the following steps: uniformly coating CMAS on the surface of the thermal barrier coating, and carrying out corrosion treatment according to set temperature and time; the corroded thermal barrier coating is subjected to longitudinal linear cutting, and the cut section is gradually ground and polished; sEM characterization is conducted on the polished cutting section, and an SEM image is shot for further quantitative analysis; based on the obtained SEM image, the corrosion depth of the CMAS in the thermal barrier coating is measured; selecting at least one identification area in the CMAS corrosion area, and calculating the area of the CMAS phase in each identification area; and calculating the corrosion degree C of the CMAS to the thermal barrier coating based on the proportion of the CMAS phase area in the identification area. The method is simple and easy to operate, the proportion of the area corroded by the CMAS in the corrosion area is introduced as a key evaluation index on the basis of corrosion depth measurement, and a unified, reliable and quantifiable standard is provided for objectively and quantitatively evaluating the CMAS corrosion resistance of the thermal barrier coating.

The invention discloses a polytetrafluoroethylene compensator with good corrosion resistance and a preparation method thereof.The polytetrafluoroethylene compensator is composed of a corrugated pipe, a pipe connecting flange and an end flange, the pipe connecting flange and the end flange are located at the two ends of the corrugated pipe, the corrugated pipe is composed of a lining layer and a base material layer, and the base material layer is made of stainless steel; the preparation method comprises the following steps: firstly, carrying out surface grafting on nano aluminum oxide by using isocyanate silane, and introducing an active reaction group; then part of active groups react with benzotriazole, so that the corrosion inhibition and adhesion enhancement functions are realized; finally, enabling the residual active groups to react with hydroxylated polytetrafluoroethylene activated by alkali treatment, and coating a chemical inert layer on the surface of the residual active groups; the obtained core-shell structure functional filler is dispersed in epoxy resin to prepare a coating, and after the coating is coated on a stainless steel base material and cured, a high-performance compensator with high hardness, strong adhesive force, excellent corrosion resistance and weather resistance is formed.

The invention belongs to the technical field of research and development of fast neutron reactor jackets and structural materials, and particularly relates to a high-temperature-lead-bismuth-corrosion-resistant high-silicon-content ferrite / martensite steel ladle tube and a preparation method thereof. According to the mass percentage, the composition mainly comprises the following components: 0.16-0.24% of C; 0.4 to 0.8 percent of Mn; cr: 11.6% to 12.4%; 1.2 to 1.8 percent of W; 0.1 to 0.4 percent of Ta; 0.2 to 0.4 percent of V; 1.0%-1.8% of Si and Fe. The preparation method comprises the steps of vacuum induction and vacuum arc remelting. Carrying out homogenization treatment and forging; extruding and annealing; cold rolling and annealing; and performing normalizing and tempering treatment. Through an efficient short-flow process route and reasonable smelting, pipe machining deformation and heat treatment processes, the microscopic structure of the material is remarkably improved, then the mechanical property and high-temperature lead and bismuth corrosion resistance of the finished pipe are improved, and the use requirement of the lead and bismuth cooling fast reactor fuel assembly cladding material under the high-temperature working condition is met.

The invention relates to the technical field of power cables, and provides a corrosion-resistant insulated power cable which sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside, and the sheath layer comprises the following raw materials in parts by weight: 70-80 parts of polyethylene, 20-25 parts of polyvinyl chloride, 10-15 parts of filler, 6-8 parts of a compatilizer, 1-3 parts of a plasticizer, 0.5-1.5 parts of an antioxidant, 1-2 parts of a lubricant and 1-2 parts of a cross-linking agent. The filler comprises the following raw materials in parts by weight: 60-70 parts of talcum powder, 30-40 parts of kaolin and 8-10 parts of a nitrogen-containing fluorinated aromatic compound. According to the technical scheme, the problem of poor corrosion resistance of the insulated power cable in the prior art is solved.

The invention belongs to the field of corrosion and protection, and discloses a preparation method of an intelligent coating with multistage self-repairing capability. According to the method, a core-shell structure nano container with a metal organic framework (MOF) compound as a core and layered double hydroxide (LDH) as a shell is prepared, different functional objects are respectively loaded in the core and the shell by adopting a step-by-step in-situ loading method, and graded release of the functional objects is realized by utilizing pH responsiveness of the MOF and corrosive ion responsiveness of the LDH; the nano container is added into an organic coating as a filler to construct an intelligent coating with multi-stage self-repairing capability. The problems of passive protection and uncontrollable corrosion inhibitor release of a traditional anti-corrosion coating are solved, the coating can repair corrosion defects in time according to needs, the long-acting corrosion resistance is remarkably improved, the preparation process is simple, the condition is mild, and the coating is suitable for metal protection of high-end equipment and other complex service environments.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The invention relates to a preparation method and an application method of a corrosion inhibitor intercalated LDH / MoS2 synergistically enhanced corrosion-resistant polyurea coating. The preparation method comprises the following steps: preparing corrosion inhibitor intercalated LDH by adopting a hydrothermal method; preparing a corrosion inhibitor intercalation LDH / MoS2 heterostructure by combining a hydrothermal method with an in-situ growth mode; preparing a polyurea matrix; and mixing the corrosion inhibitor intercalation LDH / MoS2 heterostructure into the polyurea matrix, and carrying out dispersing and defoaming treatment on the corrosion inhibitor intercalation LDH / MoS2 heterostructure. According to the preparation method, a corrosion inhibitor intercalation LDH / MoS2 heterostructure composite filler is constructed in situ in a polyurea matrix, efficient synergy of an active protection mechanism and a passive physical barrier is achieved, high compatibility of a filler system and the polyurea matrix is ensured, and finally the polyurea composite coating with excellent long-acting corrosion resistance and excellent comprehensive performance is obtained. And the long-acting protection requirement in an extremely severe environment is met.

The invention provides a gradient self-repairing sealing coating and a preparation method thereof, and relates to a high-temperature protection material. The gradient self-repairing sealing coating comprises a bonding layer, a gradient middle layer, a transition layer and an abradable surface layer which are sequentially arranged from a base body to the surface. A bonding layer in the gradient self-repairing sealing coating contains silicate, so that the bonding strength and the heat-resistant stability of a matrix are improved; rare earth silicate and Ir elements are introduced into the gradient intermediate layer, so that high-temperature corrosion resistance is enhanced, and thermal stress is relieved; the transition layer contains zirconium oxide and graphene and has the functions of thermal isolation and stress regulation; the abradable surface layer is formed by combining rare earth silicate and graphite, low friction and preferential abrasion are achieved, and effective sacrifice protection is provided. The overall structure can have multiple properties of heat, corrosion resistance and abrasion resistance, and is suitable for the surface protection requirement under the complex hot end working condition.

The invention belongs to the technical field of stress corrosion tests, and particularly relates to a dry-wet alternating environment stress corrosion test device and method.The test device is simple in structure, convenient to operate and suitable for stress corrosion tests of metal materials of dry-wet alternating parts of ships, wharfs and other equipment facilities. Therefore, the corrosion performance and the residual life of the metal and the component thereof under the stress action of pulling, bending and the like in the dry-wet alternate harsh marine environment are measured, and a basis is provided for material selection, structural design and the like of key stress parts such as related equipment facilities. The test method is based on corrosion equivalent conversion, the seawater medium flow velocity is controllable, stress corrosion test parameters of the dry-wet alternating environment can be reasonably determined, and corrosion damage of the dry-wet alternating part of the equipment under the long-term stress service condition can be rapidly reproduced under the condition that the stress corrosion mechanism and the damage development process are not changed; the test time is greatly shortened, the test cost is reduced, and rapid screening and examination verification of novel structures / materials of equipment are realized.

The invention relates to the technical field of crude oil decalcification, in particular to a low-corrosivity crude oil decalcification agent and a preparation method thereof. The low-corrosivity crude oil decalcifying agent is prepared from the following raw materials: acetic acid, citric acid, modified chitosan, ethanol and deionized water, wherein the modified chitosan is prepared by synthesizing N-hydroxyacrylamide, performing sulfonation treatment, and grafting poly (N-isopropylacrylamide) with carboxymethyl chitosan. The preparation method comprises the following steps: adding deionized water and modified chitosan into a blending kettle, heating to 65-75 DEG C, stirring, sequentially adding acetic acid and citric acid, continuously stirring, finally adding ethanol, stirring, and cooling to obtain the decalcifying agent. The decalcifying agent can efficiently remove organic calcium, equipment corrosion is reduced through temperature-sensitive film forming, chelate is stable at high temperature, sewage COD is low, the decalcifying agent adapts to an existing electro-desalting process, and industrial application is easy.

The invention relates to the technical field of aluminum alloy pipes, in particular to a corrosion-resistant aluminum alloy pipe which comprises an aluminum alloy pipe and a corrosion-resistant layer coated on the surface of the aluminum alloy pipe, the aluminum alloy pipe comprises the following raw materials: 0.1-0.3% of Mg, 0.06-0.2% of Si, 0.1-0.5% of Fe, 0.005% of Cu, 0.2-0.5% of Mn, less than 0.1% of Cr, 0.1-0.4% of Zn, 0.05-0.2% of Ti, 0.01-0.05% of V and the balance of Al; the corrosion-resistant layer comprises the following components in parts by weight: 100 parts of epoxy resin emulsion, 15-25 parts of composite modified titanium diboride, 3-5 parts of an amino curing agent, 1-3 parts of carbon fibers, 20-30 parts of deionized water, 2-3 parts of a dispersing agent and 0.3-0.5 part of a defoaming agent. According to the technical scheme, the overall corrosion resistance and impact resistance of the aluminum alloy pipe are remarkably improved.

The invention relates to the technical field of pipeline steel for oil and gas transmission, in particular to a novel low-C low-Cr corrosion-resistant pipeline steel plate, a preparation method and a pipeline steel pipe, and the novel low-C low-Cr corrosion-resistant pipeline steel plate comprises the following chemical elements: less than or equal to 0.03 wt% of C, less than or equal to 0.025 wt% of Sb, 0.50-1.20 wt% of Al, 0.0005-0.0012 wt% of Mg, 0.0012-0.0042 wt% of Ca, less than or equal to 0.50 wt% of Cr, 0.10-0.30 wt% of Ni, 0.10-0.30 wt% of Si, 1.20-1.80 wt% of Mn, 0.10-0.30 wt% of Mo, 0.02-0.06 wt% of Nb, 0.03-0.08 wt% of V, 0.01-0.03 wt% of Ti, less than or equal The manufactured steel plate is low in manufacturing cost, excellent in yield strength, tensile strength, ductility, impact toughness, corrosion resistance, hydrogen induced cracking resistance and other mechanical properties and suitable for seabed and land oil and gas conveying pipeline engineering in the high Cl <-> and CO2 / H2S corrosion environment.

This invention discloses a corrosion resistance testing device for PFA film production, relating to the field of film corrosion testing technology. It includes a housing, with a mounting plate fixedly connected inside the housing. A mounting frame is fixedly connected to the upper end of the mounting plate. A rotating column is penetrating the inner top wall of the mounting frame and rotatably connected to the mounting frame. A rotating plate is fixedly connected to the lower end of the rotating column. Multiple corrosive liquid droplet application mechanisms are provided on the rotating plate, evenly spaced along the circumference of the rotating plate. A rotating mechanism connected to the rotating column is provided on the mounting frame. A mounting groove is provided at the upper end of the mounting frame, and a limiting mechanism is provided inside the mounting groove. A partition plate is fixed inside the housing, located below the mounting plate. This invention, through the movement of the PFA film, enables different corrosive liquids to sequentially test the corrosion resistance of different positions on the PFA film, making the corrosion resistance testing process more efficient.

The invention discloses a high-temperature-corrosion-resistant stainless steel gas distribution disc and a preparation method thereof, and relates to the technical field of stainless steel machining, stainless steel is subjected to micro-arc oxidation treatment, the high temperature resistance and wear resistance of the surface of the stainless steel are improved, but the corrosion resistance of the stainless steel subjected to micropore treatment needs to be improved. Stainless steel subjected to micro-arc oxidation treatment is subjected to titanium dioxide layer plating treatment, micro-arc oxidation holes provide additional anchoring points, titanium dioxide layer plating treatment is carried out on the basis, the corrosion resistance of the stainless steel is improved, micro-arc oxidation treatment is firstly carried out on the surface of the stainless steel, then titanium dioxide is plated on the surface of the stainless steel, and the corrosion resistance of the stainless steel is improved. And the binding force between the titanium dioxide layer and the stainless steel substrate can be obviously improved. The graphene oxide-titanium dioxide composite sol is added into the electroplating solution, invasion of corrosive media is effectively blocked, the diffusion path of the corrosive media is prolonged through the graphene sheet layer, and the corrosion resistance of the stainless steel is further improved.

The invention discloses an electrolytic solution of a platinum-rhodium alloy, a preparation method and a preparation method of a plating layer of the platinum-rhodium alloy, and belongs to the technical field of precise electroplating. The electrolytic solution comprises a platinum salt, a rhodium salt, a first additive, a second additive, a first complexing agent, a second complexing agent, a first stabilizer and a second stabilizer, the first additive is a sulfamic acid compound containing 3-4 hydroxyalkyl groups, the second additive is sulfamic acid salt containing 3-4 hydroxyalkyl groups, and the first complexing agent and the second complexing agent are a platinum salt and a rhodium salt. The first complexing agent is a mixture of dicarboxylic acid and dicarboxylic acid containing amino or hydroxyl, the second complexing agent is a salt corresponding to the dicarboxylic acid, and the first stabilizer is a mixture of alkyl sulfonic acid and alkyl sulfonate. Through the synergistic effect of the additive, the complexing agent and the stabilizer, the additive, the complexing agent and the stabilizer form a five-membered to seven-membered heterocyclic coupling structure with platinum ions and rhodium ions, and the stability of the electrolytic solution is remarkably improved. And the obtained platinum-rhodium alloy coating is compact and uniform, and has excellent nitric acid steam and mixed gas corrosion resistance.

The invention relates to a sealing rubber ring, and belongs to the technical field of sealing materials. The problems that a traditional sealing rubber ring is narrow in temperature resistance range, poor in medium corrosion resistance, unbalanced in mechanics and elasticity, short in anti-aging service life and prone to precipitation and pollution are solved. The material is composed of a base material, a composite anti-precipitation filler and auxiliary components, the base material contains four components including modified fluororubber and the like, the composite anti-precipitation filler contains modified nano calcium carbonate and the like, and the auxiliary components contain vulcanizing systems, reinforcing systems and the like. The modified fluororubber is prepared by a specific process. The preparation method comprises the following steps: banburying, standing, vulcanizing, cooling and removing flash. The rubber ring has the advantages of wide temperature-resistant range, medium corrosion resistance, aging resistance, balanced mechanical properties and no precipitation pollution, and is suitable for industrial scenes with extreme temperature difference, strong corrosion and the like.

The utility model discloses a weighing type sulfuric acid anti-corrosion filling machine which comprises a first filling area and a second filling area which are arranged in parallel, and each of the first filling area and the second filling area is composed of a rack and a conveying mechanism penetrating through the rack. A sulfuric acid conveying assembly parallel to the conveying mechanism is installed on the portion, behind the conveying mechanism, of the supporting plate face of the machine frame, a height lifting mechanism is arranged on the portion, between the conveying mechanism and the sulfuric acid conveying assembly, of the supporting plate face, a PFA lining structure is arranged on the inner wall of a pipeline of the sulfuric acid conveying assembly, and the adjacent pipelines are in sealed connection through flanges. The surface of the stainless steel pipe is lined with a PFA material, conveying and filling of high-corrosion liquid such as sulfuric acid are achieved through the fluorine lining valve and the corrosion-resistant hose, the whole machine achieves high-precision filling metering through the two sets of filling stations, and gas generated by the solution is collected and treated through the cover structure and the acid mist collecting device. And high-speed precise filling operation of high-corrosivity materials such as sulfuric acid is achieved.

The invention discloses a coating, a preparation method and application, and relates to the technical field of anticorrosive coatings. The included angle between the plane of most of the lamellar filler in the coating and the macroscopic surface of the base material is controlled to be smaller than 45 degrees through a magnetron orientation method, that is, the lamellar filler is close to the state of being parallel to the surface of the base material, the transmission path of a corrosive medium can be longer and more zigzag, the maze effect can be further strengthened, and the corrosion resistance of the coating is improved. Therefore, the corrosion path of the corrosive medium is greatly prolonged, and the heat-conducting property of the matrix is reserved to the greatest extent. The dry film of the coating still has high corrosion resistance in the ultrathin state, the heat conduction performance of the fin base material of the heat exchanger can be reserved to the maximum degree, the service life of the heat exchanger is greatly prolonged, and the energy-saving long-term effect of the heat exchanger is greatly improved. In addition, the composite coating provided by the invention is simple in preparation process and relatively low in cost, and has extremely high market application value.

The invention discloses an immersed heat dissipation composite phase change cooling liquid, which is prepared from the following components in parts by weight: 97.0 to 99.7 parts of basic liquid, 0.1 to 1.5 parts of antioxidant and heat stabilizer, 0.1 to 0.8 part of corrosion inhibitor and 0.1 to 0.5 part of state monitoring tracer agent, the invention has the advantages of high-efficiency phase change heat dissipation capability, excellent electrical insulating property, long-term chemical stability, corrosion resistance and leakage monitoring property.

The invention relates to the technical field of cables, and provides a high-toughness corrosion-resistant medium-voltage power cable, which comprises a conductor, and an insulating layer, a shielding layer, an armor layer and a sheath layer which are sequentially arranged outside the conductor, the sheath layer comprises the following components in parts by weight: 70-100 parts of polyvinyl chloride, 30-40 parts of nitrile rubber, 10-15 parts of a flame retardant, 15-20 parts of a plasticizer, 1-3 parts of an antioxidant, 5-10 parts of a filler, 2-4 parts of a heat stabilizer, 1-3 parts of a compatilizer and 0.5-2 parts of a cross-linking agent; the filler is prepared from the following raw materials in parts by weight: 100 parts of calcium carbonate, 20 to 24 parts of 2-ethylhexyl acrylate and 6 to 10 parts of acrylic acid. According to the technical scheme, the problem of poor corrosion resistance of the medium-voltage power cable in the prior art is solved.

This invention belongs to the field of catalytic material preparation technology, specifically relating to a method for preparing high specific surface area pure phase α-type molybdenum carbide by hydrogen intercalation modification of MoO3 and its application, including the following steps: (1) adding MoO3 powder to hydrochloric acid and dispersing it to prepare a mixture of MoO3 and hydrochloric acid; (2) adding metal powder to the mixture in step (1) and performing pre-reduction treatment by in-situ hydrogenation of the metal and hydrochloric acid to prepare H x MoO3 precursor; (3) H prepared in step (2) x The MoO3 precursor is carbonized under a carbon source gas to obtain a pure α-type molybdenum carbide with a high specific surface area. This method is simple and effective, avoids the use of corrosive NH3 gas during carbonization, and does not require a metal as a medium, thus solving the current problem of not being able to prepare metal-free modified pure α-MoC in one step.

The invention discloses wear-corrosion-resistant high-strength steel for a power transmission tower and a preparation method thereof, and belongs to the technical field of metal materials. The wear-corrosion-resistant high-strength steel for the power transmission tower provided by the invention has good corrosion resistance and wear resistance, has excellent wear resistance in a soil environment of sulfate ions with the concentration of 300 mg / kg-50000 mg / kg and chloride ions with the concentration of 500 mg / kg-10000 mg / kg, and meets various environmental performance requirements of an acid soil environment, an atmospheric corrosion environment and the like. In an acid soil environment, the corrosion resistance is more than 8 times that of plain carbon steel, and the relative corrosion rate is lower than 10%; compared with Q355B, the corrosion rate of atmospheric corrosion resistance is lower than 40%, and the abrasive wear rate is 26.5%-28.0%; and through reasonable matching of corrosion-resistant elements, the requirements of corrosion resistance in various environments are met. The yield strength is 775 MPa-805 MPa, the tensile strength is 952 MPa-985 MPa, the percentage elongation after fracture A50 is larger than or equal to 28%, the low-temperature impact toughness at the temperature of-60 DEG C is larger than or equal to 260 J, meanwhile, the forming performance is excellent, and the 180-degree cold bending requirements that d is equal to 1.0 a are met.

The invention belongs to the field of catalysts, and discloses a catalytic material based on lignin derivation and a preparation method and application thereof. The catalytic material is prepared from lignin derived carbon and NiFe LDH; the lignin derived carbon is inserted into the interlayer of the NiFe LDH and is coated on the surface of the NiFe LDH. The preparation method comprises the following steps: S1, dissolving a lignin derivative in water to obtain a first solution; s2, dissolving metal salt in water to obtain a second solution, wherein the metal salt comprises ferric salt and nickel salt; s3, mixing the first solution and the second solution, and adjusting the pH value to obtain a mixed solution; and S4, immersing the conductive current collector into the mixed solution for hydrothermal reaction, taking out the conductive current collector after the reaction is finished, and treating the conductive current collector to obtain the catalytic material. The obtained catalytic material is used for an anode oxygen evolution reaction in an electrolytic seawater environment, and has high activity, high stability and good chlorine corrosion resistance.

The invention discloses a hydrogenation device scale inhibitor for heavy high-sulfur raw oil and a preparation method of the hydrogenation device scale inhibitor, and relates to the technical field of scale inhibitors. The scale inhibitor is prepared from a polyisobutylene succinimide dispersing agent, a high-temperature-resistant scale inhibition dispersing agent, an anti-rust agent, an imidazoline corrosion inhibitor, an antioxidant, a sulfide chelating agent, a clearing agent, cup carbazole alkylbenzene sulfonate and a solvent in specific parts by weight. The preparation method comprises the following steps: heating the solvent to 80-100 DEG C, sequentially adding the other components, and stirring for 30-40 minutes. Aiming at the characteristics of heavy high-sulfur raw oil, the scale inhibitor realizes high scale inhibition rate, excellent high-temperature stability and strong sulfur corrosion resistance through a multi-component synergistic effect, effectively solves the problems of scaling and corrosion of a hydrogenation device, prolongs the operation cycle of the device, and is suitable for a hydrogenation process of high-sulfur and high-asphaltene raw oil.