1918results about "Anodisation" patented technology

The invention relates to the technical field of alloy pouring processes, in particular to a magnesium alloy heterogeneous flow overall coordination pouring process which comprises the steps of conducting pouring numerical simulation through simulation software, optimizing pouring design and determining a composite flow guide structure, a mold temperature control scheme and an alloy component regulation and control strategy. Magnesium alloy smelting and refining are conducted; preheating the mold by using an intelligent temperature control system; during the period, the intelligent temperature control system monitors and adjusts the temperature of the mold, and the online alloy adding system and the impurity adsorption filtering device keep the components of the melt uniform and pure; and after pouring is completed, controlling the mold temperature according to a preset cooling curve to slowly and uniformly solidify the melt. The design of the bionic branch-shaped flow dividing structure, the dynamic adjustable flow guide plate and the like reduces casting defects, and the casting forming quality is improved. And on-line alloy adding and impurity adsorption filtering ensure that melt components are stable, and the casting performance is improved.

The invention relates to an optical fiber hydrogen sensor based on a silver film-nanowire hole array structure and a preparation method thereof in the field of photochemical sensors. The optical fiber hydrogen sensor comprises a multimode optical fiber, and a sensing area is formed on the multimode optical fiber; the sensing area is formed by stripping a coating layer with a preset length from the multimode optical fiber, thinning the optical fiber in the area, plating a silver film on the surface of the thinned optical fiber, and adsorbing a nanowire hole array structure which is sequentially and vertically arranged on the surface of the silver film in a liquid level self-assembly manner; the nanowire hole array is of a metal-medium-metal (MIM) structure, a gold-palladium nanowire array is arranged at the bottom, an intermediate medium layer is made of aluminum oxide, and a silver film with a hole array in any shape is arranged at the top. When light is transmitted to a sensing area from a fiber core of the multimode optical fiber, the light and a metal silver film can excite a surface plasmon resonance (SPR) effect, meanwhile, an MIM structure formed by a gold-palladium nanowire, an aluminum oxide dielectric layer and a porous silver film serves as an optical coupling antenna through a local surface plasmon resonance (LSPR) effect at the edge of a top hole, and the optical coupling antenna is used for transmitting the light to the sensing area. Light energy is efficiently converged and excited in an extremely bound gap plasmon (Gap Plasmon) in an aluminum oxide dielectric layer, so that far-unconventional electromagnetic field enhancement is generated in a sensing core area, and the sensitivity of the sensor is greatly improved.

The invention relates to the technical field of motor rotors, and discloses a motor rotor and a machining method thereof.The method comprises the steps that hot forging is conducted on an alloy steel base material based on the preset forging and pressing temperature, and multi-layer gradient cutting is conducted on a rotor initial blank; the method comprises the following steps: performing composite deposition treatment on a cylindrical blank based on a magnetic material, placing the magnetic composite blank in a vacuum environment for dynamic heat treatment, performing dynamic balance finishing on the heat treatment blank based on a preset alloy, performing surface strengthening treatment on a balance rotor in a nitrogen atmosphere, and coating the balance rotor subjected to surface strengthening with a preset coating, the motor rotor with the optimized surface is obtained; and dynamic balance trimming is combined with preset alloy characteristics for microstructure regulation and control, and it is ensured that the rotor has excellent operation stability in a high-rotation-speed environment. And finally, surface strengthening treatment is carried out in a nitrogen atmosphere, and a functional coating is used for covering, so that the wear resistance and corrosion resistance of the surface layer are remarkably improved, and the requirements of a motor system on a high-performance rotor under complex working conditions are met.

The invention relates to the technical field of high-corrosion-resistance stainless steel pipe processing, and discloses a high-corrosion-resistance high-molybdenum stainless steel pipe processing technology based on gradient carbide design, which comprises the following steps: applying an axial gradient magnetic field in a stainless steel pipe rolling process, and combining with dynamic strain rate matching rolling to promote molybdenum atom grain boundary migration and inhibit carbide coarsening, so as to obtain a high-molybdenum-resistance stainless steel pipe. Nano carbide smaller than or equal to 50 nm is formed on the surface layer, and submicron carbide of 200-500 nm is formed on the core part; after rolling, micro-arc oxidation and phosphonic acid group silane dipping are immediately carried out to form a self-repairing passivation film; and finally, an alternating magnetic field and pulse current are adopted for cooperative annealing, and a grain boundary molybdenum-poor region and residual stress are eliminated. Through magnetic field-chemical-thermal multi-field coupling, the material has erosion corrosion resistance of a gradient carbide structure, dynamic passive film self-repairing and low-temperature high toughness, and is suitable for long-acting protection of deep sea oil and gas pipelines.

The invention discloses an electric engine assembly integral forming process based on precision integral casting, which comprises the following steps: designing a split type precision mold through computer aided design software, and carrying out nitriding treatment to improve the performance; selecting a specific aluminum alloy raw material, performing vacuum induction melting and refining, and injecting the aluminum alloy raw material into a preheated and sprayed mold cavity in a low-pressure casting manner; and demolding after air cooling and water cooling are combined, then after-treatment procedures such as deburring and heat treatment are conducted, and finally detection and assembly are conducted. A conformal cooling water channel design and an ultrasonic-assisted smelting technology are adopted in the process innovation, and the casting process is monitored in real time. According to the process, manufacturing procedures are reduced, compared with a traditional mode, the production efficiency is improved by 30%-50%, the cost is reduced by 20%-30%, the assembling problem is effectively avoided, the sealing performance and reliability of the electric engine are improved, the service life of the electric engine is prolonged, high integration is achieved, and the modern industrial requirement is met.

The invention relates to the technical field of material surface treatment, and discloses a preparation method of a microcapsule-based self-repairing coating, the self-repairing coating and a light metal alloy. The preparation method of the self-repairing coating comprises the following steps: adding microcapsules into a mixed solution of epoxy resin and a curing agent, and stirring to obtain a coating; the surface of a base body is coated with the paint, and a self-repairing coating is obtained; the preparation method of the microcapsule comprises the following steps: preparing a prepolymer solution which comprises the following components: urea and formaldehyde; preparing an oil-in-water emulsion, namely adding tung oil into a surfactant solution, and emulsifying to obtain the oil-in-water emulsion; and mixing the prepolymer solution and the oil-in-water emulsion to obtain the microcapsule. When the self-repairing coating is damaged, the microcapsules at the damaged part are broken, the core material tung oil is released, the core material flows in the coating and fills the damaged part, and the damaged part is repaired, so that the automatic repairing effect is achieved, the corrosion speed of an alloy matrix is slowed down, and the corrosion resistance is improved.

The invention discloses a coating with in-situ plugging and active protection functions as well as a preparation method and application thereof, and belongs to the technical field of metal material surface treatment. An innovative electrolyte design scheme is provided, the commercial 5083 aluminum alloy is subjected to micro-arc oxidation in a phosphate system containing specific cerium salt and a complexing agent, film layer growth and in-situ chemical blocking of micropores are completed in one step, the process is simple, and the obtained coating has excellent blocking firmness and corrosion resistance, has an active protection function and is suitable for large-scale industrial production. And a new solution is provided for improving the durability of the 5083 aluminum alloy in a harsh marine environment.

The invention relates to the technical field of lamps, in particular to a plating forming process of a lamp. The problems that the interface bonding force of the coating and the matrix is insufficient and the corrosion resistance of the coating is poor are solved. According to the method, micro-arc oxidation is carried out in the pretreatment stage, a compact Al-Si-O ceramic layer is generated on the surface of a high-aluminum matrix in situ, and in combination with deep diffusion of plasma siliconizing, a transition area with gradient Si distribution is constructed; the pitting corrosion resistance of the coating is optimized through the component gradient design of the inner-layer coating, the middle-layer coating and the outer-layer coating; the surface of the coating lamp is subjected to checkerboard scanning by using short pulse laser, so that the porosity and microdefects of the surface of the coating are improved, and the corrosion resistance of the coating is enhanced; a uniform oxynitride passivation film is generated on the surface of the coating in situ through low-temperature plasma post-oxidation-nitridation treatment, the defect that a film layer is easy to strip in a traditional passivation process is avoided, and the corrosion resistance of the material in long-term service can be stably maintained.

The invention relates to the field of material science and mechanical engineering, in particular to a high-strength aluminum-magnesium-silicon material bolt for a new energy automobile and a preparation method of the high-strength aluminum-magnesium-silicon material bolt. The bolt is made of an aluminum-magnesium-silicon alloy, and the alloy contains magnesium, silicon, manganese, iron, chromium, titanium, scandium, rare earth elements and the balance of aluminum. By optimizing the proportion of rare earth elements (yttrium, lanthanum and cerium) and scandium, grains are effectively refined, the tensile strength, the yield strength and the ductility are improved, and meanwhile the corrosion resistance and the fatigue resistance are enhanced. The preparation method comprises the steps that vacuum melting is combined with the ultrasonic-assisted technology, alloy elements are evenly distributed, and then the material structure is optimized through solution treatment at the temperature of 540 DEG C for 1.5 h and aging treatment at the temperature of 160 DEG C for 8 h. And the surface of the bolt is subjected to anodic oxidation and coated with a composite coating containing silicon dioxide nanoparticles, so that the wear resistance and the corrosion resistance are improved. Through verification, the bolt has the excellent performance that the tensile strength is larger than or equal to 490 MPa, the yield strength is larger than or equal to 440 MPa, the ductility is larger than or equal to 8.5%, and the salt spray test time is larger than or equal to 1500 hours, and the fastening requirement of the new energy automobile under the complex working condition is met.

The invention relates to the technical field of aluminum alloy guide rail machining processes, in particular to a high-precision manufacturing process of an aluminum alloy guide rail for rail transit, and the high-precision manufacturing process of the aluminum alloy guide rail specifically comprises the following steps: step 1, designing and smelting an alloy material, and utilizing component optimization to design an alloy formula to inhibit grain coarsening; impurity control: Fe < = 0.25%, and Mn < = 0.15%; the tensile strength is greater than or equal to 275MPa, and the ductility is greater than or equal to 12%, which is superior to that of similar products (conventionally less than or equal to 10%); micron-order precision control: the cross section dimensional tolerance is less than or equal to + / -0.15 mm (improved by 50% compared with the traditional process); 12 key parameters from smelting to finished products are monitored in real time, and the yield is increased to 99.8% from 92%.

The invention relates to the technical field of aluminum alloy heat treatment, and discloses a high-power tooth radiator aluminum alloy strengthening and toughening heat treatment method. Gradient temperature control solution treatment including at least two different temperature stages; step 2; carrying out electromagnetic auxiliary shape correction treatment, and applying an alternating magnetic field in the cooling process; step 3; the two-stage aging treatment comprises high-temperature first-stage aging and low-temperature second-stage aging; step 4; carrying out pulse type aging strengthening by adopting a periodic temperature fluctuation mode; step 5; and performing micro-arc oxidation surface treatment to generate an aluminum oxide layer in the electrolyte. Gradient temperature control solution treatment is adopted, a beta phase is fully dissolved, abnormal growth of crystal grains is inhibited, meanwhile, uniform nucleation of a GP region and dispersed distribution of a theta'phase are promoted through two-stage aging treatment, the strength and toughness of the alloy are improved, in addition, electromagnetic auxiliary shape correction and a composite residual stress elimination technology are combined, thermal stress deformation is effectively inhibited, residual stress is eliminated, and the performance of the alloy is improved. The size stability and the fatigue life are improved.

The invention relates to the technical field of aluminum alloy materials, in particular to a high-strength and high-toughness Al-V-Ti-Mn-Mg series aluminum alloy and a preparation method thereof.The high-strength and high-toughness Al-V-Ti-Mn-Mg series aluminum alloy mainly comprises, by mass, 0.05%-0.5% of V, 0.05%-0.5% of Ti, 0.4%-1.2% of Mn, 0.3%-1.2% of Mg, 0.1%-0.3% of Cr, smaller than or equal to 0.15% of inevitable impurity elements, the balance Al and inevitable impurities, and the balance Al and inevitable impurities. And at least one of Sc, Zr and Er, less than or equal to 0.2% of Sc, less than or equal to 0.2% of Zr, less than or equal to 0.2% of Er, and the balance of Al. The high-strength and high-toughness Al-V-Ti-Mn-Mg series aluminum alloy provided by the invention is less in coarse second-phase grains and excellent in anodic oxidation effect, and has excellent corrosion resistance and a small-color-difference coloring effect after anodic oxidation.

A method of manufacturing a structure having anodized parts includes: forming a bottom metal pattern with a dielectric layer thereon on a substrate, in which the dielectric layer has an opening exposing the bottom metal pattern; forming a semiconductor layer to cover the dielectric layer; forming a first metal layer on the semiconductor layer; forming a second metal layer on the first metal layer; forming a mask layer on the second metal layer to expose a portion of a top surface of the second metal layer; etching the second metal layer through the mask layer until a top surface of the first metal layer is exposed, in which an etch selectivity of the second metal layer and the first metal layer is greater than 2.0; anodizing the first metal layer through the mask layer to form an anodized segment; and removing the mask layer.

The invention discloses a rare earth element doped stainless steel oxygen evolution electrode and a preparation method thereof, and belongs to the technical field of electrode preparation. The preparation method of the stainless steel oxygen evolution electrode comprises the steps that stainless steel with impurities removed serves as an anode and is placed in an alkaline solution with the concentration being 7-12 mol / L, cyclic voltammetry is adopted, stainless steel treated through cyclic voltammetry is obtained, and the potential window is-0.3 V to 1.5 V; the stainless steel is placed in an alkaline solution with the concentration being 1-2 mol / L and serves as an anode for electrolysis, and anodic oxidation stainless steel is obtained; the anodic oxidation stainless steel is placed in a cerium ion solution, a cyclic voltammetry method is adopted, the stainless steel serves as an anode to be treated, and a stainless steel oxygen evolution electrode is obtained through electro-deposition; wherein the potential window is-1.5 V to 1.0 V (+ / -0.5 V). The preparation method is simple, the cost is low, large-scale preparation is easy, long-time, high-temperature and other complex preparation processes are not needed, and when the electrode is used as an electrode for electrolyzing oxygen evolution in water, the electrode has excellent catalytic activity and shows huge application prospects in large-scale industrial hydrogen production through water electrolysis.

The present invention relates to a method for simultaneously achieving a superhydrophobic and superoleophobic surface on 5,000 series aluminum alloy in an anodic oxidation process without a pre-patterning step, wherein the uniform anodic oxide film can be produced even without a pre-patterning step, thus making it possible to reduce manufacturing costs, the anodic oxide film can be imparted with superhydrophobicity and superoleophobicity according to a coating composition in which a cross-linked PDMS derivative represented by chemical formula 1 and an organic solvent are used in a specific mixing ratio, the coating composition has a low manufacturing cost and the coating film thickness can be adjusted to several to several tens of nm, thus enabling application to the coating of a microstructured oxide film, and the method can be useful for creating a machine learning database for developing 5,000 series aluminum alloy surface treatment technology.

The invention relates to the field of unmanned aerial vehicle materials, and discloses a modified carbon fiber material for an unmanned aerial vehicle, which comprises the following structural layers: a carbon fiber matrix; the Ni-Ti transition layer is deposited on the surface of the base body, the thickness of the Ni-Ti transition layer is 18-22 microns, and the mass ratio of Ni to Ti is 49.5: 50.5-50.5: 49.5; the nano composite coating covers the transition layer and comprises a nickel aminosulfonate matrix, nano alpha-Al2O3 and silicon carbide whiskers, the nano alpha-Al2O3 and the silicon carbide whiskers are dispersed in the nickel aminosulfonate matrix, the content of Al2O3 is 78-82 g / L, and the content of the silicon carbide whiskers is 14-16 g / L. Through the gradient composite interface structure design, cross-scale synergistic reinforcement of the metal matrix, the ceramic layer and the resin layer is achieved, the synergistic effect of chemical bonding and physical anchoring is further enhanced, and the material can still keep excellent interface stability in a thermal-mechanical coupling environment.

The invention belongs to the technical field of metal material surface modification, and particularly relates to a magnesium alloy surface conductive corrosion-resistant coating and a preparation method, the conductive corrosion-resistant coating comprises a three-layer structure, the total coating thickness is 33-50 microns, the bottom coating is a low-porosity MAO coating prepared through a micro-arc oxidation method, and the thickness is 20-35 microns; the middle coating is a conductive nano-particle layer prepared by adopting a negative pressure mode; and the top coating is a zinc aluminum oxide conductive layer prepared by adopting a vapor-phase hydrothermal deposition method, and the thickness of the top coating is 13-15 microns. In addition, the invention provides the modified magnesium alloy with the conductive corrosion-resistant coating prepared on the surface, the self-corrosion current density of the modified magnesium alloy is 0.18-1.8 * 10 <-7 > A / cm < 2 >, and the volume resistivity of the modified magnesium alloy is 1.30-5.21 * 10 < 4 > omega.m.

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 belongs to the field of magnesium alloy surface treatment, and particularly relates to a magnesium alloy surface damp-heat-resistant, corrosion-resistant and mildew-proof multifunctional coating and preparation and application thereof. The damp-heat-resistant, corrosion-resistant and mildew-proof multifunctional coating on the surface of the magnesium alloy comprises an inner layer and an outer layer, wherein the inner layer is a micro-arc oxidation layer containing Ta, Sn and Sb elements, and the outer layer is an epoxy resin organic coating containing modified conductive mica powder. The multifunctional coating is used for improving the damp-heat resistance, corrosion resistance and mildew resistance of the surface of the magnesium alloy in the harsh marine atmospheric environment. The method is simple in technological process, convenient to operate, capable of forming a damp-heat-resistant, corrosion-resistant and mould-corrosion-resistant coating on the surface of the magnesium alloy, environmentally friendly, remarkable in application value and capable of meeting the actual requirements for novel multifunctional magnesium alloy materials in the fields of aerospace, ocean engineering and the like.

The invention relates to the field of manufacturing of multi-color sheath glass, in particular to glass and a preparation method of a multi-color sheath of the glass. The glass base layer comprises glass, a multicolor sheath layer and a surface self-cleaning layer. The surface self-cleaning layer of the glass has a novel composite structure of a nanocrystalline multicolor sheath layer and a quantum dot sensitized self-cleaning layer. The structure effectively solves the problem of color covering of a traditional thick coating. In addition, through cooperative modification of the carbon quantum dots and the graphene quantum dots, the photoresponse range of titanium dioxide is expanded from ultraviolet light to visible light, so that the photocatalytic efficiency of the titanium dioxide is remarkably improved.

The invention relates to the field of electrolytic copper foil processing and application, and discloses a chromium-free environment-friendly passivation solution and an electrolytic copper foil preparation method, and the passivation solution is composed of 80-120 mg / L of silver phosphate, 5-20 mg / L of o-tert-butylphenol, 60-100 mg / L of potassium pyrophosphate and 10-40 mg / L of sulfuric acid. The o-tert-butylphenol can be adsorbed to the crystal boundary of a silver layer to form antioxidant free radicals, and the antioxidant free radicals are preferentially combined with oxygen molecules to form a stable compound, so that the oxidation resistance is improved; and meanwhile, the o-tert-butylphenol can be combined with a silica group of the silane coupling agent, so that the adhesive force of the silane coupling agent on the metal surface is increased, and the stripping resistance of the copper foil is improved.

Methods of and apparatuses for the manufacture of biomimetic physical antimicrobial polymer foils are disclosed. An example method of manufacturing includes providing a substrate. The method additionally includes depositing an aluminum-containing layer on the substrate. The method yet further includes anodizing an exposed surface of the aluminum-containing layer in a first bath so as to form a plurality of pores in the exposed surface of the aluminum-containing layer. Moreover, the method includes immersing the exposed surface of the aluminum-containing layer in a second bath, further etching the plurality of pores in the exposed surface of the aluminum-containing layer. Methods also include formation of templated polypropylene and cellulose films.

The invention relates to the technical field of liquid cooling heat dissipation, in particular to a liquid cooling heat dissipation structure based on a bionic microchannel and a preparation method of the liquid cooling heat dissipation structure based on the bionic microchannel, and the liquid cooling heat dissipation structure comprises a liquid cooling plate main body, a turbulent flow generation assembly and a gradient heat sink composite layer, the fractal bionic micro-channel comprises a main channel and at least four stages of branch channels, and the last-stage branch channel is distributed in a logarithmic spiral line mode; the turbulent flow generation assembly is composed of triangular prisms and hemispherical pit arrays which are arranged in a staggered mode. The gradient heat sink composite layer comprises a diamond-containing copper composite matrix and a surface micro-nano structure. The bionic micro-channel structure is combined with the micro-channel with specific parameters, an efficient substance transmission system in a living body is simulated, the flowing uniformity of cooling liquid is optimized, generation of local hot spots is reduced, and the overall heat dissipation performance is improved.

Disclosed are a corrosion-resistant film for a magnesium alloy wheel and a preparation method thereof, The corrosion-resistant film for a magnesium alloy wheel includes: a micro-arc oxidation (MAO) coating, a chemically blocked coating, a physical vapor deposition (PVD) high-density inorganic hybrid coating, a high oxidation-resistant powder coating which are sequentially stacked from inside to outside by using the magnesium alloy wheel as a substrate. In the present disclosure, based on a micro-arc oxidation technology, zirconium, titanium, an iron salt, nano silicon, polymer resin are added into an electrolytic solution, and under a constant voltage mode of an adjustable power supply, the MAO coating is generated on the surface of the magnesium alloy wheel, followed by chemical blocking; the PVD high-density inorganic hybrid coating is obtained by coating on the chemically blocked coating, physical blocking is performed; the high oxidation-resistant powder coating is spray-coated on the PVD high-density inorganic hybrid coating.

The invention discloses a preparation method of a rare earth element doped high-corrosion-resistance self-healing PEO / LDHs composite coating on the surface of a magnesium alloy. The preparation method comprises the following specific steps: firstly, putting a pretreated base material into a micro-arc oxidation electrolyte to obtain a micro-arc oxidation (PEO) layer; then the PEO layer is placed in a rare earth salt solution for a hydrothermal reaction, then ultrasonic treatment is carried out in absolute ethyl alcohol to prepare a rare earth doped PEO layer, and finally the rare earth doped PEO layer is immersed in an LDHs growth solution for hydrothermal treatment to obtain the composite coating. According to the method, the problems that single rare earth modified PEO is poor in binding force and long in cycle period can be effectively solved, the PEO / LDHs composite coating prepared through the hydrothermal method has high corrosion resistance, rare earth cations with corrosion inhibition performance can be released when the coating is exposed to a corrosion environment, LDH nanosheet reconstruction covers the defects in the coating, and the corrosion resistance of the coating is improved. The magnesium alloy has an obvious self-repairing effect, and the service life of the magnesium alloy can be remarkably prolonged.

The invention relates to the field of preparation of lubricating materials, in particular to a preparation method of composite phase change lubricating gel based on temperature-friction force synergistic response. The lubricating gel adopts a sandwich layered structure; the bottom layer is a porous ceramic layer formed by micro-arc oxidation, is filled with a disulfide bond dynamic network polymer and is anchored on a metal substrate; the middle layer comprises a microencapsulated phase change material which is dispersed in a polyurethane network containing dynamic disulfide bonds and is wetted with ionic liquid; the surface layer is an epoxy resin coating rich in boron nitride nanosheets, and a rapid heat conduction channel is constructed. Compared with the prior art, the lubricating state can be automatically adjusted in the friction process without external energy input, and the method has the advantages of being sensitive in multi-field coupling response, capable of achieving automatic antifriction protection, high in extreme working condition adaptability and the like.

The invention discloses an intelligent preparation method of a high-strength, high-toughness and corrosion-resistant green aluminum frame, and high-value utilization of secondary aluminum is realized through a microalloying component design and a full-process automatic process. The process comprises the following steps: S1, smelting and casting: controlling alloy components (Si is 0.70-0.80%, Mg is 0.60-0.70% and the like, and the tolerance of Fe is widened to be less than or equal to 0.25%), and accurately controlling the hydrogen content (H is less than or equal to 0.17 cm / 100g); s2, homogenizing treatment: preheating (5 DEG C / min to 300 DEG C) in a multi-section homogenizing furnace, keeping constant temperature (560 + / -10 DEG C * 8 hours), and performing composite cooling to eliminate structure segregation; s3, extrusion treatment: optimizing extrusion parameters (the on-machine temperature is 460-480 DEG C, and the speed is greater than or equal to 15m / min); s6, aging treatment: controlling the temperature (the precision is + / -2 DEG C) by a tunnel type continuous aging furnace in combination with a PID algorithm; and S7, oxidation closed-loop treatment: automatically generating a 8-28 [mu] m oxidation film. The method has the advantages that the recycling rate of the secondary aluminum is larger than or equal to 60%, the yield strength is larger than or equal to 280 MPa, the salt spray corrosion resistance is larger than or equal to 1000 hours, the energy consumption is reduced by 24.4%, and the surface defect rate is smaller than or equal to 1%.

The invention provides an anodic oxidation passivation method of a neodymium-iron-boron permanent magnet zinc coating, which comprises the following steps of: performing electrochemical anodic oxidation by taking a neodymium-iron-boron permanent magnet with a zinc coating on the surface as an anode, a Pt sheet as a cathode and a passivation solution as an electrolyte, forming a passivation layer on the surface of the neodymium-iron-boron permanent magnet with the zinc coating on the surface, and cleaning and drying to obtain the neodymium-iron-boron permanent magnet with the zinc coating on the surface. A chromium-free passivation film is formed on the neodymium-iron-boron permanent magnet zinc coating, and passivation of the neodymium-iron-boron permanent magnet zinc coating is completed; the passivation solution is prepared from 10 g / L to 20 g / L of molybdate, 10 g / L to 15 g / L of ammonium fluozirconate, 1 g / L to 10 g / L of etidronic acid, 1 g / L to 10 g / L of sodium dihydrogen phosphate, 1 g / L to 10 g / L of nitric acid, 1 g / L to 10 g / L of phosphoric acid and the balance distilled water. According to the method disclosed by the invention, a complete, uniform and compact passivation film is formed on the surface of the zinc coating after passivation, the corrosion potential is improved while the corrosion current is effectively reduced, and the time for generating a rust spot in a salt spray test exceeds 72 hours.

The invention relates to the technical field of anti-corrosion treatment, and provides anti-corrosion molding powder and a radiator anti-corrosion treatment technology.The anti-corrosion molding powder is prepared by taking polyethylene glycol terephthalate as a matrix and cooperating with a TGIC curing agent, phosphoric acid activated bamboo charcoal nanofibers, graphene modified zinc oxide, a lanthanum nitrate and cerous nitrate compound, a silane coupling agent and a functional additive; a composite resin system with a compact nano-structure is prepared through high-speed ball milling pre-activation and a twin-screw gradient extrusion process. The treatment process of the radiator comprises the steps of forming the ceramic substrate layer through micro-arc oxidation, performing dynamic temperature control impregnation with acrylic acid water-based paint, spraying anti-corrosion molding powder, performing microwave infrared gradient curing, and constructing a metal substrate-ceramic layer-organic coating multi-stage protection system. The permeability resistance of the coating is remarkably improved, a continuous and compact composite protection structure is formed, the problems of interface stripping, medium permeation and poor environmental adaptability of a traditional coating are solved, and the coating is suitable for the long-acting anti-corrosion requirement of the radiator under the high-corrosion working condition.

A porous layer is arranged on the surface of the inner wall of a micro-channel in the micro-channel heat exchanger, and the porous layer is filled with a lubricating agent; and anodizing the inner wall of the micro-channel to obtain a porous layer. The invention further provides a preparation method of the ultra-smooth micro-channel heat exchanger, which comprises the following steps: taking the micro-channel heat exchanger as an anode, performing anodic oxidation treatment on the inner wall of the micro-channel, and preparing the porous layer on the surface of the inner wall of the micro-channel; and then the porous layer is filled with a lubricating agent, and the ultra-smooth micro-channel heat exchanger is obtained. The invention further provides application of the ultra-smooth micro-channel heat exchanger in electronic devices. The ultra-smooth micro-channel heat exchanger has good corrosion resistance and high boiling heat exchange efficiency.