338results about How to "Reduce corrosion rate" patented technology

The invention relates to the technical field of welding devices, in particular to an aluminum alloy door and window welding machine which comprises a mounting support, an air cylinder is mounted at the upper end of the mounting support, an output shaft of the air cylinder penetrates through the mounting support, and a welding mechanism is mounted on the output shaft of the air cylinder and comprises a first mounting plate fixedly connected with the output shaft of the air cylinder. An exhaust mechanism is mounted on the other side of the first mounting plate, four sets of first electric telescopic rods are mounted on the inner side of the mounting support, clamping mechanisms are mounted on output shafts of the first electric telescopic rods, and welding seams between arc-shaped window frames can be welded through mutual cooperation of second electric telescopic rods and first welding heads; and welding can be conducted on inner side welding seams of the assembling grooves, welding is more comprehensive, connection between the arc-shaped window frames is more stable, through mutual cooperation of a fourth gear and a third electric telescopic rod, comprehensive cleaning is conducted on the peripheries of the welding seams, cracks and bubbles during welding are avoided, and the welding seams are firmer.

The invention relates to the technical field of nodular cast iron, in particular to a silicon-molybdenum-chromium-nickel-niobium nodular cast iron material and a preparation method thereof. The material comprises the following chemical components in percentage by mass: 3.0%-3.5% of carbon, 4.3%-4.7% of silicon, 0.1%-0.3% of manganese, less than or equal to 0.05% of phosphorus, less than or equal to 0.02% of sulfur, 0.7%-1.0% of molybdenum, 0.6%-0.8% of chromium, 0.4%-0.7% of nickel, 0.3%-0.6% of niobium, 0.03%-0.06% of magnesium, 0.05%-0.1% of rare earth, 0.006%-0.012% of antimony and the balance of iron. The preparation method comprises the steps of smelting, first-time spheroidizing and inoculation, second-time spheroidizing, second-time inoculation and heat treatment in sequence. According to the obtained nodular cast iron material, the form of graphite and the number of graphite nodules are improved, carbon elements are separated out as many as possible in the form of high-carbon phase-spheroidal graphite, generation of pearlite is reduced, and the mechanical strength and high-temperature resistance of nodular cast iron are improved.

The invention discloses high-performance corrosion-resistant maritime work steel and a production method thereof, and the steel comprises the following chemical components: 0.02%-0.07% of C, 0.10%-0.25% of Si, 1.75%-2.50% of Mn, 0.022%-0.026% of P, less than or equal to 0.008% of S, 0.055%-0.060% of Nb, 0.035%-0.045% of Als, 0.90%-1.00% of Cr, 0.90%-1.00% of Ni, 0.20%-0.25% of Co, 0.0130%-0.0114% of N, 0.06%-0.065% of V, 0.035%-0.042% of Ti, 0.45%-0.52% of Cu, 0.03%-0.05% of Sn and 0.03%-0.05% of RE. Through smelting, slab continuous casting, casting blank heating, rolling and cooling, the Rp0.2 of the steel is 550-582 MPa, A is larger than or equal to 20%, the impact energy at the temperature of-80 DEG C is larger than or equal to 200 J, the corrosion resistance rate is smaller than 0.090 mm / a, the fatigue life under the load of the peak stress of 280 MPa is longer than 2 million times, the maximum thickness can reach 150 mm, and the Z-direction performance is larger than or equal to 40%. The problems that an existing steel plate for ocean engineering is low in strength, poor in low-temperature impact toughness and insufficient in corrosion resistance and fatigue resistance are solved.

The invention discloses high-performance anti-fatigue steel for ocean engineering and a production method of the high-performance anti-fatigue steel. The steel comprises the following chemical components: 0.02%-0.07% of C, 0.10%-0.25% of Si, 1.75%-2.50% of Mn, 0.022%-0.026% of P, less than or equal to 0.008% of S, 0.065%-0.070% of Nb, 0.070%-0.075% of V, 0.035%-0.042% of Ti, 1.25%-1.45% of Cr, 1.25%-1.45% of Ni, 0.30%-0.35% of Co, 0.035%-0.045% of Als, 0.0150%-0.0260% of N, 0.45%-0.50% of Cu, 0.03%-0.05% of Sb and 0.03%-0.05% of RE. Through smelting, slab continuous casting, casting blank heating, rolling, cooling and heat treatment, the Rp0.2 of the steel is 690-750 MPa, A is larger than or equal to 20%, the impact energy at the temperature of-80 DEG C is larger than or equal to 200 J, the corrosion resistance rate is smaller than 0.090 mm / a, the fatigue life under the peak stress load of 350 MPa is longer than 2 million times, the maximum thickness can reach 150 mm, and the Z-direction performance is larger than or equal to 40%. The problems that an existing steel plate for ocean engineering is low in strength, poor in low-temperature impact toughness and insufficient in corrosion resistance and fatigue resistance are solved.

The invention provides an ocean engineering anticorrosive coating and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following raw materials: fluorocarbon resin, modified synthetic mica, modified basalt fibers, modified carbon nanotubes, nano silicon dioxide, nano zinc oxide, nano titanium dioxide, carbon fibers, zinc phosphate, hydroxyl-terminated polybutadiene, a plant extract, organic tin and the like. The modified synthetic mica and the modified carbon nanotubes are modified by adopting pentaerythritol stearate, cellulose nitrate and sodium hexametaphosphate; the modified basalt fiber is modified by adopting sodium stannate, polyvinyl alcohol and sodium hexametaphosphate; the plant extract is ethanol percolation extract of kandelia candel leaves and mangnolia officinalis leaves. All the components are used in a matched mode according to a certain proportion, and the advantages of being excellent in anti-corrosion performance, good in mechanical performance, excellent in anti-aging performance, environmentally friendly and the like are achieved.

The invention discloses a water-based flux cleaning agent for integration, and belongs to the field of semiconductor cleaning agents. The water-based flux cleaning agent is prepared from the following raw materials in percentage by weight: 30-50% of alcohol ether solvent, 1-5% of organic amine, 3-5% of gemini imidazoline corrosion inhibitor and 40-70% of deionized water, wherein the sum of the weight percentages of the raw materials is 100%. According to the water-based flux cleaning agent, the imidazoline corrosion inhibitor is adopted, so that a remarkable cleaning effect on flux residues, soldering paste and fine particles on a semiconductor electronic device is achieved, meanwhile, the brightness of welding spots can be maintained, the surface insulation performance is good, the metal surface of an IPM module can be effectively prevented from being oxidized, and the service life of the IPM module is prolonged. The cleaning agent is especially suitable for cleaning pollutants in the welding process of semiconductor chips, chip type capacitors and circuit substrates.

The invention discloses incombustible water-based aerosol spray paint and a preparation method thereof, and relates to the technical field of spray paint. When the non-combustible water-based aerosol spray paint is prepared, firstly, p-(triethoxysilyl) acetophenone reacts with trimethylchlorosilane, and then the reaction product and tetramethyl tetravinyl cyclotetrasiloxane are subjected to ring opening polymerization to obtain modified polysiloxane; grafting epoxy resin with 4-vinyl-methyl benzoate, reacting with modified polysiloxane to obtain modified epoxy resin, and emulsifying to obtain a modified epoxy resin emulsion; secondly, reacting the silicon dioxide subjected to acylating chlorination with 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine nitroxide free radicals, reacting with 3-(3-thienyl) propionaldehyde, and reacting with thiophene and 3-vinyl thiophene to obtain modified silicon dioxide; and finally, mixing the modified epoxy resin emulsion, pure water, the modified silicon dioxide, a curing agent and a photoinitiator to prepare the incombustible water-based aerosol spray paint.

The invention relates to the technical field of water treatment, and discloses a water treatment agent for oilfield reinjection water and a preparation method thereof. The water treatment agent for oilfield reinjection water is obtained by copolymerization of sulfonic imidazoline quaternary ammonium salt modified quinoline, Mannich base modified chitosan, acrylic acid and sodium hypophosphite. The water solubility and corrosion inhibition of imidazoline are improved through quaternization modification of imidazoline, quaternary ammonium salt imidazoline can be adsorbed on the metal surface, the corrosion rate is reduced, the quaternary ammonium salt imidazoline serves as a surface active agent, the infiltration and dispersion effects are achieved, and the descaling rate is increased; the sulfonic acid group improves the temperature resistance and prevents the generation of gel, and the strong hydrophilicity of the sulfonic acid group enables a molecular chain to fully stretch in water, so that the scale inhibition performance is improved; mannich base is introduced into chitosan, the acid solubility and temperature resistance of chitosan are improved, the coordination chelation effect of chitosan is enhanced through the conjugation effect of aromatic rings, and the corrosion inhibition effect is improved; various functional groups play a synergistic effect, so that the corrosion and scale inhibition effect is further enhanced.

The invention discloses a bio-based gemini quaternary ammonium salt compound as well as a preparation method and application thereof. The bio-based gemini quaternary ammonium salt compound is a compound with a structural formula as shown in a formula I, wherein R1 is selected from one of cyclohexanone, cyclopentanone, acetone, 2-octanone and 2-pentanone; r2 is selected from C4-C24 alkyl groups (except C19 and C21); x is at least one of Cl, I and Br. The bio-based gemini quaternary ammonium salt compound disclosed by the invention takes 5-hydroxymethylfurfural as a raw material, has a furan ring, a quaternary ammonium salt substituent group and a long alkyl chain in the structure and can be used as a corrosion inhibitor, and a quaternary ammonium salt functional group and an alkyl long chain are constructed in the structure and respectively serve as a hydrophilic functional group and a hydrophobic functional group, so that the biological activity of the compound is improved. When the gemini quaternary ammonium salt corrosion inhibitor is in contact with steel (metal), a protective film can be formed on the surface of the steel (metal), so that the effect of protecting the steel (metal) is achieved, the corrosion speed of the steel (metal) is slowed down, and the economic benefit is extremely high; # imgabs0 #

The invention discloses a wire drawing process for a cable copper conductor of a liquid cooling over-charging pile, which comprises a copper wire drawing process, and the copper wire drawing process specifically comprises a wire drawing speed control process and a wire drawing oil concentration control process. A proper amount of antioxidant is added, copper sulfate is used for forming a protective oxidation film and preventing copper materials from being oxidized, ethidene diamine is used as a corrosion inhibitor and retarding the corrosion rate of copper, copper phosphate is used as an antirust agent and forming a protective oxidation film, and a preservative and a surfactant are used, so that the corrosion-resistant coating is prepared. A protective film is formed on the surface of the copper wire, air is isolated, and oxidation of the copper wire is reduced; meanwhile, the antioxidant can reduce friction force on the surface of the copper wire, reduce abrasion, improve wire drawing efficiency and product quality, and avoid the problems that in the copper wire drawing production process, friction is generated between the copper wire and parts such as a mold and a guide wheel, the surface temperature of the copper wire is increased, and oxidation is prone to occurring.

The invention discloses an alkali polishing additive for rapid polishing of monocrystalline silicon and a use method of the alkali polishing additive, and relates to the technical field of monocrystalline silicon etching, and the alkali polishing additive comprises the following components: a reaction accelerator, a corrosion and scale inhibitor, a PH regulator, a defoaming agent, 1, 3-bis (2-hydroxyethyl)-2-imidazolinone, 2, 5-furandimethanol, quinoline yellow, sodium glycyrrhizinate, melamine, hydroxypropyl chitosan and deionized water. The additive is good in alkali polishing effect under low weight loss, high in efficiency, good in stability, good in polished surface appearance and obvious in gain effect on the light conversion efficiency of the solar cell.

The invention relates to the technical field of coatings, in particular to an inorganic nano-composite coating material applied to corrosion prevention of a splash zone and a preparation method of the inorganic nano-composite coating material. The inorganic nano composite coating material applied to corrosion prevention of the splash zone comprises a component A and a component B. The preparation method comprises the following steps: step 1, reacting dodecafluoroheptyl methacrylate, vinyl dimethyl phosphate and liquid epoxy resin to obtain modified liquid epoxy resin; 2, after the modified liquid epoxy resin reacts with carboxyl-terminated liquid nitrile rubber, polypropylene glycol diglycidyl ether is added, and a component A is obtained; the aliphatic polyamine reacts with oleic acid to obtain a curing agent, and the amino-modified nano silicon dioxide is mixed with the curing agent to obtain a component B; the prepared coating material is high in adhesive force, high in hydrophobicity, good in impact resistance and good in corrosion resistance.

The invention provides an electric arc additive manufacturing high-corrosion-resistance magnesium alloy component and a preparation method and application thereof.The preparation method of the electric arc additive manufacturing high-corrosion-resistance magnesium alloy component comprises the following steps that a magnesium alloy base plate is fixed to a workbench provided with a heating plate, and the heating plate is provided with a thermocouple; the thermocouple is connected with the temperature control box to control the temperature of the heating plate so as to realize constant-temperature heating of the magnesium alloy substrate; and the magnesium alloy wire is fixed to wire feeding equipment, single-channel layer-by-layer reciprocating deposition is carried out along the set track according to the set welding machine technological parameters till the target height is reached, and the high-corrosion-resistance magnesium alloy component is obtained. According to the method, the temperature of the magnesium alloy substrate and the interlayer temperature are controlled at a constant temperature through the external temperature field, the manufacturing process parameters are adjusted, the interlayer binding force and the forming quality of the magnesium alloy component are improved, and the prepared high-corrosion-resistance magnesium alloy is small in grain size and uniform in precipitated phase distribution and shows excellent corrosion resistance compared with a traditional cast magnesium alloy.

The utility model relates to the technical field of garbage furnaces, in particular to a large garbage waste heat furnace structure which can reduce the temperature of high-temperature superheated flue gas so as to reduce the corrosion rate, is small in transformation degree and easy to realize, and comprises a fire grate, a hearth, a second flue, a third flue, a horizontal flue and a tail flue, a first evaporator, a high-temperature superheater, a medium-temperature superheater and a low-temperature superheater are sequentially arranged in the horizontal flue in the flue gas direction, and flag type evaporators are installed in the second flue and the third flue. A space is reserved between the high-temperature superheater in the horizontal flue and the first evaporator, a second evaporator is arranged in the space, and the number of the low-temperature superheaters is reduced to one group.

The invention discloses a compound corrosion inhibitor for gathering and transportation pipelines of oil and gas fields and a preparation method, and relates to the field of corrosion and protection of petroleum pipeline steel, and the compound corrosion inhibitor comprises 59-64% of a compound corrosion inhibitor, 30-33% of an auxiliary material and 3-11% of a filler. The main materials comprise fluorine-containing oleic acid imidazoline, quinoline quaternary ammonium salt and carbon quantum dots; auxiliary materials: a surfactant, a complexing agent and an antioxidant; the filler is nano mesoporous silica. The corrosion inhibitor disclosed by the invention can be used for effectively protecting gathering and transportation pipelines of oil and gas fields in neutral or acidic corrosive media and high-temperature environments. The corrosion inhibitor has the advantages of being environmentally friendly, small in dosage and low in cost.

The invention relates to the field of welding materials of austenitic stainless steel, in particular to a flux-cored wire based on concentrated nitric acid corrosion-resistant austenitic stainless steel and a preparation method, and aims to solve the problems that an existing welding material of the austenitic stainless steel is poor in concentrated nitric acid corrosion resistance, intergranular corrosion and stress corrosion cracking are prone to occurring in a concentrated nitric acid environment, and the welding quality is poor. Therefore, the service life and the safety of the equipment are influenced. According to the austenitic stainless steel flux-cored wire, by optimizing the chemical components and the preparation process, the corrosion resistance and the welding performance of the welding wire in a concentrated nitric acid environment are remarkably improved, the use requirements in a high-corrosion environment can be met, and a welded joint has high strength and toughness; the performance requirement of an engineering structure on a welding joint can be met; the austenitic stainless steel flux-cored wire is suitable for welding equipment, pipelines and structures in contact with concentrated nitric acid in the industries of chemical engineering, petrochemical engineering, pharmacy and the like, and has wide application prospects.

The invention relates to an intelligent photovoltaic curtain wall which has the function of adjusting light transmission intensity. The surface of the photovoltaic curtain wall is fully covered by the photovoltaic module, the supporting body is installed behind the photovoltaic battery module, and the photovoltaic module is fixed on the supporting body through the module fastener. Air hole channels are arranged among the photovoltaic modules to adjust temperature, and air holes can be connected with external constant-temperature systems such as a central air conditioner, so that the photovoltaic curtain wall has good constant-temperature capability. The photovoltaic cell is located between the guide rails, and the controller controls the driving motor to achieve movement of the cell position, so that the light transmission intensity is adjusted in good time. A mechanical arm and a control motor are arranged in the photovoltaic cell storage box and used for storage and output of photovoltaic cells, and the control motor receives instructions of the controller to operate. The controller is connected with the driving motor and the control motor through data lines, the shielding area ratio of the photovoltaic cell is automatically adjusted according to user requirements, and automatic adjustment of the light transmission intensity is achieved.

The invention relates to the technical field of coatings, and discloses a functionalized graphene modified polyurethane composite coating, compared with a labyrinth shielding structure of a traditional polyurethane coating, the functionalized graphene modified polyurethane composite coating added with functionalized graphene can form a more compact film-shaped structure through layer-by-layer superposition of two-dimensional sheet structures of graphene, so that the graphene modified polyurethane composite coating has a good shielding effect. By means of the nanometer size, high surface hydrophobicity and conductivity of graphene, the corrosion rate of metal is reduced, the corrosion resistance and mechanical performance of a coating are improved, aminopyridine can improve the corrosion current and impedance value of a polyurethane coating film, the corrosion resistance of the polyurethane coating film is improved, and the corrosion resistance of the polyurethane coating film is improved. Through a blending preparation means, the chain segment of polyvinyl chloride is compatible with the flexible chain segment of polyurethane, and the mechanical property of the polyurethane coating is further improved.

The invention discloses chip unsealing equipment, and relates to the field of semiconductor equipment, and the chip unsealing equipment comprises a workbench, the workbench is provided with a stand column, the stand column is rotatably sleeved with a rotating ring, the two opposite sides of the outer side wall of the rotating ring are provided with a laser emission mechanism and a liquid dropping mechanism, and the workbench is provided with a driving mechanism. The driving end of the driving mechanism is provided with a clamping tool used for clamping and fixing a plastic package device, the laser emission mechanism carries out laser ablation on the plastic package device, the liquid dropping mechanism carries out quantitative liquid dropping on the plastic package device, a cleaning pool is arranged on the workbench and located below the driving mechanism, and the driving mechanism drives the clamping tool to move in and out of the cleaning pool. According to the application, the corrosive liquid is dropped into the groove of the plastic package device by using the liquid dropping mechanism, and the liquid dropping mechanism can accurately drop quantitative chemical corrosive liquid into the groove in a small amount and multiple times, so that the corrosion speed of the plastic package device is reduced, and the condition of chip damage is reduced.

The invention discloses an anti-fatigue low-temperature-resistant steel for ocean engineering and a production method thereof. The steel comprises the following chemical components: 0.02 to 0.07 percent of C, 0.10 to 0.25 percent of Si, 1.75 to 2.50 percent of Mn, 0.022 to 0.026 percent of P, less than or equal to 0.008 percent of S, 0.045 to 0.050 percent of Nb, 0.05 to 0.055 percent of V, 0.02 to 0.03 percent of Ti, 0.60 to 0.80 percent of Cr, 0.6 to 0.8 percent of Ni, 0.12 to 0.15 percent of Co, 0.035 to 0.045 percent of Als, 0.013 to 0.014 percent of N, 0.35 to 0.44 percent of Cu and 0.03 to 0.05 percent of Sn. Through smelting, slab continuous casting, casting blank heating, rolling and cooling, the Rp0.2 of the steel is 500-560 MPa, A is larger than or equal to 24%, the impact energy at the temperature of-80 DEG C is larger than or equal to 200 J, the corrosion resistance rate is smaller than 0.090 mm / a, the fatigue life under the peak stress load of 250 MPa is longer than 2 million times, the maximum thickness can reach 150 mm, and the Z-direction performance is larger than or equal to 40%. The problems that an existing steel plate for ocean engineering is low in strength, poor in low-temperature impact toughness and insufficient in corrosion resistance and fatigue resistance are solved.

The invention provides a graphene oxide geopolymer coating as well as a preparation method and application thereof. The graphene oxide geopolymer coating is prepared from the following raw material components: slag, fly ash, water, an exciting agent, a water reducing agent, a defoaming agent, graphene oxide, an acrylic emulsion, nano titanium dioxide and phenylethylamine. According to the geopolymer coating disclosed by the invention, the slag and the fly ash are used as gel materials, and the graphene oxide is added to modify the geopolymer coating, so that the phenomena of drying shrinkage and cracking of the coating are slowed down; the exciting agent with relatively low water glass modulus is adopted to adapt to activation of slag and fly ash as gel materials, so that the problems of saltpetering, serious dry shrinkage and the like of geopolymers are avoided; amino groups in phenylethylamine not only can react with active functional groups in a geopolymer matrix to form covalent bonds, but also can react with carboxyl groups and epoxy groups on the surface of graphene oxide to form stable covalent bonds, and due to the addition of phenylethylamine, cross-linking of the amino groups and the carboxyl groups becomes tighter, so that the surface of the geopolymer matrix is more stable. Therefore, the corrosion resistance and the performance in all aspects can be further improved.

The invention relates to a hydrogen fuel cell stainless steel bipolar plate surface composite coating and a preparation method thereof. The composite coating comprises a metal Cr transition layer, a CrN bottom layer, a metal Cr middle layer and a CrN surface layer which are sequentially arranged on a stainless steel bipolar plate. A metal Cr transition layer, a CrN bottom layer, a metal Cr middle layer and a CrN surface layer are sequentially deposited on a stainless steel bipolar plate through a physical vapor deposition method. Compared with the prior art, the corrosion-resistant and conductive coating for the stainless steel bipolar plate of the hydrogen fuel cell, provided by the invention, can solve the problems of poor corrosion resistance, insufficient conductivity and the like of the stainless steel bipolar plate in an acid environment of the hydrogen fuel cell.

The invention discloses a high-performance aluminum alloy, a preparation technology and application of the high-performance aluminum alloy in a battery tray, and belongs to the technical field of aluminum alloys, the high-performance aluminum alloy is subjected to surface treatment through functional paint, the paint contains mica powder, hexagonal boron nitride and other high-performance filler and auxiliaries, and the excellent performance of a coating is ensured. And a uniform and compact protection layer is formed through an ultraviolet irradiation curing process. Compared with the prior art, the aluminum alloy material disclosed by the invention shows a relatively low average corrosion rate in acidic, neutral and alkaline corrosion media, is good in performance in a cold and hot alternating resistance test, is free of cracks and does not crack, and has a wide application prospect in the field of battery trays.

The invention discloses a preparation method of a modified MXene / epoxy resin composite anticorrosive coating, and belongs to the technical field of anticorrosive coating materials. The preparation method disclosed by the invention comprises the following steps: (1) mixing an L-sodium erythorbate solution with an MXene dispersion liquid to obtain L-sodium erythorbate / MXene powder; (2) adding acetone into epoxy resin for dilution to obtain an epoxy resin solution; the preparation method comprises the following steps: adding L-sodium erythorbate / MXene powder into DMF (Dimethyl Formamide) to obtain an L-sodium erythorbate / MXene dispersion liquid; and adding glycidyl methacrylate, a flatting agent and 650 low-molecular polyamide to obtain the composite anticorrosive paint. MXene is modified by L-sodium ascorbate, so that the dispersity of MXene in epoxy resin is improved, a layer-by-layer stacked densified structure is formed in the epoxy anticorrosive coating, holes formed after solvent volatilization are reduced, the transmission path of a corrosive medium is increased, the shielding effect is effectively formed, and the anticorrosive performance is improved.

The utility model provides a crane with a weighing alarm function, belongs to the technical field of port cranes, and aims to solve the problems that a steel cable in a hoisting mechanism of the conventional crane with the weighing alarm function is corroded and the maintenance process of the steel cable is relatively tedious. Comprising a bridge body. The running trolley is connected into the bridge main body in a sliding manner; the driving mechanism is in bolted connection with the upper part of the running trolley; the lifting mechanism is in bolted connection with the upper part of the running trolley; the steel cable main body is wound in the lifting mechanism; the hoisting and weighing hook is fixedly mounted in the steel cable main body; the fixed frame is in bolted connection with the bottom of the travelling trolley; the cleaning mechanism is arranged in the fixed frame; and the oil conveying mechanism is arranged in the fixed frame. The device has the advantages of being convenient to clean and maintain, reducing corrosion and the like.

The invention relates to the technical field of coatings, in particular to an inorganic water-based carbon nanotube metal corrosion prevention coating and a preparation method thereof. The inorganic water-based carbon nanotube metal corrosion prevention coating comprises the following components in parts by weight: 15-20 parts of modified carbon nanotubes, 5-10 parts of modified water-based epoxy resin, 20-25 parts of a hydroxyl acrylic emulsion, 20-25 parts of a filler, 1-3 parts of a silane coupling agent, 1-4 parts of a flatting agent, 2-5 parts of a dispersing agent, 1-4 parts of a flash rust inhibitor, 1-3 parts of a coalescing agent, 2-4 parts of a defoaming agent and 30-50 parts of deionized water, the preparation method comprises the following steps: stirring the modified carbon nanotubes, the modified water-borne epoxy resin, the hydroxyl acrylic emulsion, the filler, the silane coupling agent, the flatting agent, the dispersing agent, the flash-rust inhibitor, the coalescing agent, the defoaming agent and the deionized water in parts by weight at 40-50 DEG C for 20-30 minutes. The coating prepared by the method disclosed by the invention is uniform in dispersion, good in adhesive force, excellent in corrosion resistance and durability stability, and long in service life.

The invention belongs to the technical field of sewage treatment, and particularly relates to an efficient multifunctional water purifying agent as well as a preparation method and application thereof. The preparation method comprises the step of mixing the CFN coexisting blending degradation agent, the FNX synergistic removal agent, the modified aluminum oxide powder, the modified activated carbon powder calcium salt, the flocculating agent and the complex catalyst step by step. Wherein the flocculating agent is a carboxymethyl chitosan derivative, and is prepared by sequentially carrying out ring-opening reaction, quaternization reaction and esterification reaction on an epoxy compound; the carboxymethyl chitosan derivative structurally contains mercaptobenzothiazole and quaternary ammonium salt structures, and has excellent adsorption performance, corrosion inhibition performance and antibacterial performance. The efficient multifunctional water purifying agent provided by the invention realizes effective removal of a plurality of pollution factors, has small fluctuation of influence on the pH value of sewage after being added, does not need subsequent acid-base adjustment, can reduce the sewage treatment cost in multiple levels, and improves the treatment efficiency and the effluent quality.

The invention relates to the technical field of corrosion inhibitors, and discloses a high-temperature-resistant corrosion inhibitor and a preparation method thereof.The high-temperature-resistant corrosion inhibitor is obtained by adding boric acid modified chitosan, a triazinyl corrosion inhibitor and deionized water into a reactor and stirring. Lone pair electrons provided by a large number of free hydroxyl groups in chitosan in the boric acid modified chitosan can be well adsorbed with metal, so that the metal is prevented from being eroded by a corrosive medium; the boron element forms a protective oxidation film or adsorption film on the metal surface, so that the corrosion process is inhibited; and the ferrocene group in the corrosion inhibitor also has a relatively good corrosion inhibition effect. A quaternary ammonium salt group and a sulfonic acid group in the triazinyl corrosion inhibitor can prevent further corrosion of metal.

The invention relates to the technical field of composite biological coatings. Specifically, the invention relates to a hydrophobic composite layer on a medical degradable magnesium alloy matrix and a preparation method of the hydrophobic composite layer. In the preparation method, firstly, a porous ceramic oxide layer is formed on a magnesium alloy matrix through micro-arc oxidation treatment, so that the corrosion rate of the magnesium alloy is reduced; then, a strontium-doped hydroxyapatite layer is prepared on the surface of the micro-arc oxidation layer by using a chemical deposition method, so that the biocompatibility of the magnesium alloy is improved; and finally, dipping and pulling the magnesium alloy subjected to micro-arc oxidation and chemical deposition treatment in a polylactic acid solution containing nano-hydroxyapatite for one time or multiple times, so as to form a hydrophobic polymer layer. According to the hydrophobic composite layer prepared by the method, the corrosion resistance and the biocompatibility of the magnesium alloy are improved at the same time. The invention also relates to a magnesium alloy implant article comprising the hydrophobic composite layer.

The invention discloses a metal ceramic inert anode with high electric conductivity and heat conductivity and high-temperature molten salt corrosion resistance and a preparation method of the metal ceramic inert anode. According to the method, a ceramic component ZrB2 (the conductivity is 1 * 104 S / cm to 1.2 * 105 S / cm) with good electrical conductivity and a ceramic component SiC (the heat conductivity coefficient is 320 W / m.K to 348 W / m.K) with good heat conduction performance are introduced, so that the (Cu) Ni metal content in the NiFe2O4-NiO-based metal ceramic is reduced, the electric conduction and heat conduction performance of the metal ceramic inert anode is improved, meanwhile, the molten salt corrosion resistance of the inert anode is improved, the annual corrosion rate is 0.64 cm / y or below, and the metal ceramic inert anode can be applied to the field of metal ceramics. The cathode primary aluminum also has relatively high purity, and the purity reaches 99.7% or above; the method is easy to operate, efficient and beneficial to application and popularization.