95 results about "Anodizing" patented technology

According to the anodic oxidation technology suitable for the 6061 aluminum alloy, multi-component silica sol is adopted for conducting room-temperature dipping hole sealing and low-temperature curing on a 6061 aluminum alloy anodic oxidation film, and technology energy consumption and equipment requirements are reduced. The dense silicon network seals the membrane holes, prolongs the diffusion path of a corrosive medium and prevents the corrosive medium from invading the substrate, thereby greatly improving the corrosion resistance of the membrane layer and inhibiting pitting corrosion.

The utility model provides an aluminum sheet surface phosphoric acid anodizing treatment device for a single-lap tensile shear test of an adhesive film, which comprises a reaction tank filled with phosphoric acid electrolyte; the aluminum sheet is arranged at one end in the reaction tank in a hanging manner and is connected with the positive electrode of the power supply; the lead plate is arranged at the other end in the reaction tank in a hanging manner and is connected with the negative electrode of the power supply; the heater is arranged in the reaction tank and is used for heating the phosphoric acid electrolyte; the areas of the lead plate and the aluminum sheet immersed in the phosphoric acid electrolyte are set as S1 and S2 respectively; the range of S1 to S2 is 1: 1-1: 10. By designing the special aluminum sheet surface phosphoric acid anodizing treatment device, instant and small-batch phosphoric acid anodizing treatment on aluminum sheets in a laboratory environment is realized, and the problem that the existing industrial batch production mode is difficult to meet small-scale and high-frequency flexible requirements is solved; and the rapid verification requirement on a small amount and multiple batches of samples in the adhesive film research and development stage is met.

The application discloses a continuous anodic oxidation production line for curtain wall and a preparation method thereof, wherein the production line is provided with a feeding mechanism, a grinding plate mechanism, a first pressure water washing mechanism, an alkali immersion mechanism, a second pressure water washing mechanism, an oxidation mechanism, a first detection mechanism, a third pressure water washing mechanism, an electrolytic coloring mechanism, a fourth pressure water washing mechanism, a hole sealing machine, a second detection mechanism, a film coating machine and a discharging mechanism; after unwinding the plate material, the plate material is input through the feeding mechanism and then sequentially passes through the above mechanisms to perform first pressure water washing, alkali washing, second pressure water washing, oxidation, first detection, third pressure water washing, electrolytic coloring, fourth pressure water washing, hole sealing, second detection and film coating on the plate material, so as to obtain the curtain wall; and after obtaining the curtain wall, the curtain wall is output through the discharging mechanism, continuous production of the curtain wall is realized, and the curtain wall does not need to be stopped for transfer and plate material carrying; the overall degree of automation is high, and the processing efficiency is high.

The utility model discloses a device for aluminum alloy anodic oxidation dyeing, which comprises an electrolytic dyeing tank, two supports are fixedly connected to both sides of the electrolytic dyeing tank, the upper ends of the four supports are fixedly connected with the same bearing plate, the upper surface of the bearing plate is fixedly connected with two support plates, and the support plates are fixedly connected with the upper surface of the bearing plate. The upper surfaces of the two supporting plates are fixedly connected with first motors, and the output ends of the two first motors are fixedly connected with first belt wheels. Through an air blower and an air outlet, after the air blower is started, the air blower generates wind power, the wind power is sprayed out through the air outlet, parts on the hook can be quickly blow-dried, the volatilization speed of electrolyte is increased, and the working efficiency is improved; and air blown out of the air outlet can blow-dry the parts more comprehensively, and the part drying efficiency is improved.

A method of anodizing an aluminum alloy, comprising the steps of: providing an anodizing bath containing tert-butoxide, primarily oxalic acid; aging the anodic oxidation bath to condense the metal alkoxide to form metal oxide particles and an acid ester; heating the bath to 40 DEG C to 80 DEG C; stirring the bath at a speed of 200 to 700 rpm (revolutions per minute); immersing the workpiece in a bath and anodizing at a constant current density of 1 A / dm2 to 4 A / dm2 for 1 to 20 minutes or until the bath voltage reaches a threshold value of 100 to 200 V; the workpiece is then anodized at a constant voltage for 20 minutes to 200 minutes to produce an anodized surface having a thickness of 5 microns to 100 microns, the anodized surface comprising an optically discontinuous pore structure that produces a white or near-white appearance.

In an example embodiment, a method of coloring an alloy is provided. The method includes anodizing a substrate in an anodizing bath comprising phosphoric acid at a constant temperature and a constant voltage for a first period of time to form an anodized layer comprising a barrier layer; reducing the constant voltage applied to the anodizing bath for a second period of time to change a thickness of the barrier layer and change a width of pores in the anodized layer; plating the substrate in a plating bath at a first current that increases over a third period of time according to a current profile of the plating bath; and plating the substrate in the plating bath at a second current for a fourth period of time.

This invention discloses an anodizing process and apparatus for the inner wall of a metal container, relating to the field of metal surface treatment technology. The apparatus includes a cathode and a circulation system; the cathode is inserted into the inner cavity of the metal container through an opening; the circulation system includes at least a circulation pump and an inlet pipe, the outlet of which is configured to be positioned at the bottom of the container's inner cavity; wherein the opening of the metal container is configured as an overflow outlet for the electrolyte. This invention, through forced circulation, allows the electrolyte to enter from the bottom and exit from the top of the container, forming a flow pattern of bottom inlet and top overflow. This effectively improves the flow field distribution within the container cavity, promptly removes reaction heat and discharges oxidizing gases, significantly improving the uniformity and density of the anodized film on the inner wall and reducing film defects.

The present invention relates to the field of metal surface preparation by anodizing processes, and to a method for producing a corrosion-resistant aluminum-silicon alloy casting, and more particularly to the optimization of the anodizing of high-silicon aluminum castings by using a multi-stage anodizing cycle. The present invention also relates to a corrosion-resistant aluminum-silicon alloy casting and its use.

The invention provides a coating material which sequentially comprises a conductive base material, a Cu2O antibacterial layer and a low-surface-energy modification layer from inside to outside, an anodic oxidation or micro-arc oxidation layer is arranged or not arranged between the conductive base material and the Cu2O antibacterial layer, cuprous oxide is high in antibacterial performance but poor in corrosion resistance, and the coating material can be applied to the field of coating materials. The corrosion resistance of the metal base material can be effectively improved through anodic oxidation treatment or micro-arc oxidation treatment, and then the service life of the conductive metal base material is prolonged.

The present application relates to the technical field of metal pressure processing, and discloses an extrusion method for recycled aluminum alloy profiles for anodic oxidation and electrophoretic spraying, which comprises the following steps: adding strontium and boron into recycled aluminum melt, controlling the mass ratio with iron, forming an interface enrichment layer with shear sensitivity on the surface of the iron-containing impurity phase by using strontium; establishing an ingot axial temperature gradient, and controlling the average equivalent strain rate in the extrusion process to be maintained in the critical rheological interval, and physically activating the interface enrichment layer to produce shear thinning; and implementing online gradient freezing quenching after the profile leaves the die. Through the synergy of the critical strain rate and the interface modification, the present application builds an in-situ lubricating layer between the hard impurity phase and the aluminum matrix, eliminates the microscopic tearing caused by the rheological mismatch, and solves the color difference problem of the recycled aluminum surface treatment.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The invention belongs to the technical field of aerospace fastener processing, and particularly relates to an aerospace aluminum alloy fastener black anodic oxidation treatment process which sequentially comprises the following steps: S1, pretreatment; s2, anodic oxidation treatment is conducted, specifically, the fastener subjected to pretreatment is placed in an anodic oxidation electrolyte to be subjected to anodic oxidation; s3, dyeing treatment is conducted, specifically, the fastener subjected to anodic oxidation is placed in a black dyeing solution to be dyed; and S4, sealing treatment is conducted, specifically, the dyed fastener is placed in sealing liquid to be sealed. According to the invention, the growth defect of the oxidation film is inhibited from the source through the composite additive system, and the optimized dyeing process is combined, so that the uniformity of the film layer and the sufficient and firm adsorption of the dye are ensured, and the surface color of the final product is uniform and black without any irregular white points.

The utility model discloses a circulating self-cleaning type anode precision oxidation device which is characterized in that an oxidation anode is arranged on two side plates of a tank chamber of a tank body, and a liquid supply cavity partition plate and a backflow cavity pore plate are respectively and fixedly arranged at the front end and the rear end of the tank chamber of the tank body; a liquid supply cavity is defined by the liquid supply cavity partition plate and an end plate at the corresponding end of the tank body, a filter is arranged in the liquid supply cavity, and a plurality of fluid directors are mounted on the liquid supply cavity partition plate; a backflow cavity is defined by the backflow cavity pore plate and an end plate at the corresponding end of the tank body and leads to the liquid supply cavity through a circulating pipeline; and an anode scraping plate is arranged on the oxidation anode in a sliding manner. A flow guide cylinder of the flow guide device is fixedly installed in a plate hole of the liquid supply cavity partition plate, and a flow guide paddle is installed on an output shaft of the flow guide motor and located in the flow guide cylinder in a rotatable mode. The precise oxidation device not only can effectively filter out solid particle impurities in the electroplating liquid, but also can effectively reduce the flow velocity difference of the electroplating liquid on the section of the tank chamber, prevents the circulating electroplating liquid from generating vortexes and flowing dead angles, and is particularly suitable for precise anodic oxidation treatment.

A surface treatment method for a SiC substrate, including the following processes or steps: anodizing a workpiece surface (W1) of the SiC substrate by passing a current having a current density of 15 mA / cm 2 or more through the SiC substrate as an anode in the presence of an electrolyte (S); arranging an abrasive wheel layer (32) of a surface treatment pad (3) to face the workpiece surface, and selectively removing oxides formed on the workpiece surface by the anodizing with the abrasive wheel layer; and simultaneously or sequentially performing the anodizing of the workpiece surface and the selective removal of the oxides formed on the workpiece surface with the abrasive wheel layer.

The invention relates to the technical field of metal processing, and discloses a three-dimensional metal trademark manufacturing process which comprises the following steps: preparing a coating composition from the following raw materials: modified silicon dioxide nanoparticles, oxidized polyethlene wax emulsion and alkali-soluble acrylic resin emulsion; an aluminum alloy base material is selected, the back face of the aluminum alloy base material is milled to be thin, the front face is subjected to anodic oxidation and hole sealing treatment, and a coating composition is coated to form a protective coating; stamping forming is carried out, extrusion stamping is carried out through cooperation of corner heightening convex points of an upper die punch and corner deepening concave pits of a forming insert, and the base material is forced to plastically flow to fill character grooves; after forming, a top coating and surface metal are removed through CNC cutting, metal three-dimensional characters are reserved, and the remaining coating is cleaned and removed through a weak alkaline solution. The stress dispersion and lubrication performance of the coating is utilized, brittle cracking and whitening of the anodic oxide film in the stamping process are effectively prevented, and the three-dimensional metal trademark with the sharp contour, the complete side face oxidation and the highlight top face is obtained in cooperation with the cutting technology.

The invention belongs to the field of mechanical engineering, particularly relates to a method for improving shell forge piece anode discoloration, and aims to solve the problem of uneven color and luster of a bottom corner area of a shell forge piece after anodic oxidation. According to the method, the structure of a lower mold cavity is optimized, a material storage area matched with the outline of a product is additionally arranged at the corner of the bottom of a corresponding shell, a slowly-changing transition area is formed, and metal is guided to flow stably; during forging and pressing, the blank fills the cavity under the pressure and enters a material storage area to reduce the local flow speed and homogenize the deformation; and after forming, CNC machining and anodic treatment are carried out to obtain the non-heterochromatic forge piece. Geometric parameters of the material storage area are determined based on simulation optimization, and precision machining is adopted to ensure the surface quality. According to the method, anode discoloration is effectively eliminated, the material utilization rate is increased, the CNC machining period is shortened, the process robustness is enhanced, and the comprehensive manufacturing cost is remarkably reduced.

The invention discloses a method for preparing a special-shaped flat copper wire CuO ceramic layer based on three-synergistic-effect anodic oxidation, which comprises the following steps: step 1, grinding and polishing a flat copper wire and removing an oxidation film on the surface layer, pouring absolute ethyl alcohol into the flat copper wire to completely immerse the treated copper wire, carrying out ultrasonic cleaning and deionized water chemical washing, and drying to obtain a material; 2, NaOH is added into deionized water under magneton stirring, PVA and NaKC4H4O6 are weighed and added into the solution, and an anodic oxidation electrolyte is obtained; 3, the material obtained in the step 1 is subjected to water bath heating in the anodic oxidation electrolyte prepared in the step 2 with graphite as double cathodes, and oxidation is conducted; step 4, cleaning the material oxidized in the step 3 in deionized water; step 5, drying the obtained material in a convection oven to obtain a CuO ceramic layer; the preparation period is short, film-substrate combination is good, and the method is suitable for special-shaped parts and can be used in the fields of wind power, motors, submarine cables and the like.

This application relates to the field of aircraft structural design technology, and more particularly to a folding tail boom structure for a single-rotor helicopter with a tail rotor, including a fuselage, a tail boom, and a folding assembly disposed at the connection between the fuselage and the tail boom. The folding assembly includes a front folding frame and a rear folding frame, with the front folding frame fixedly connected to the tail of the fuselage and the rear folding frame fixedly connected to the front end of the tail boom. The front and rear folding frames are rotatably connected by at least one set of shoulder screws, forming a folding rotating pair. This invention provides a porous oxide film layer formed by phosphoric acid anodizing at the connection interface between the front and rear folding frames and the fuselage / tail boom, combined with structural adhesive bonding, riveting mechanical fixation, and end face screw locking, forming an interconnected four-fold fixing structure. At the same time, the porous oxide film layer significantly improves the roughness and chemical activity of the bonding interface, greatly enhancing the bonding strength and effectively solving the problem of loosening of traditional quick-release pin connections under heavy loads.

This invention belongs to the field of surface modification technology, specifically relating to a fly ash-reinforced hard anodized composite coating for aluminum alloys and its preparation method. Fly ash mainly contains quartz and mullite phases, exhibiting a mixed morphology of irregular particles and locally spherical particles; its surface carries a negative charge, which facilitates migration to the anode region during anodizing and enhances its bonding with the oxide film, forming a fly ash-reinforced composite oxide coating, thereby improving the density, hardness, and wear resistance of the oxide film.

Disclosed are an electronic device including a housing having a matte surface and a method of manufacturing the same. An electronic device according to various embodiments of the disclosure is an electronic device including a housing. The housing may include a base material including an aluminum alloy, a plurality of pits adjacently formed on a surface of the base material, and a crystal grain boundary protrusion part formed as a crystal grain boundary of the surface of the base material portion protrudes on the surface. A method of manufacturing a housing for an electronic device may include an etching step of generating irregularities on a surface of a base material including an aluminum alloy in a way to etch the base material by dipping the base material into an etching solution containing chloride ions, and an anodizing step of forming an anodizing layer on the surface of the base material by dipping, into an anodizing solution, the base material on which the etching step has been completed and applying a current to the base material by using the base material as an anode.

The utility model provides anodizing and dipping processing equipment which comprises a base and a reaction tank located on the base, a punching screen plate is arranged in the reaction tank and divides an inner cavity of the reaction tank into an upper oxidizing cavity and a lower impacting cavity, a transmission filtering pipeline is arranged outside the reaction tank, and the transmission filtering pipeline is communicated with the upper oxidizing cavity and the lower impacting cavity. The upper oxidation cavity is communicated with the lower impact cavity through a transmission filtering pipeline, the top of the base is rotationally connected with a groove-shaped supporting frame located on one side of the reaction tank, the top of the groove-shaped supporting frame is rotationally connected with a door-shaped hanging frame, and a hanging bracket is arranged at the bottom in the door-shaped hanging frame; a control oil cylinder used for controlling the groove-shaped supporting frame to swing is arranged on the base. According to the utility model, the punching mesh plate is arranged in the reaction tank, the punching mesh plate can buffer the impact force of a fallen workpiece and prevent the workpiece from impacting and damaging the bottom in the reaction tank, and then the transmission filtering pipeline is arranged, so that the electrolyte in the reaction tank passes through the punching mesh plate to flow upwards, and the uniformity of the concentration of the electrolyte is improved.

The utility model discloses an anode hanging tool and anode treatment equipment, the anode hanging tool is used for conducting anode treatment on a product, the product comprises a metal base body and plastic arranged on the edge of the metal base body, the anode hanging tool comprises a main rod structure and a hanging structure, and the hanging structure comprises a frame, a fixing piece and a conductive sliding mechanism; the fixing member and the conductive sliding mechanism are fixed to the frame. The fixing piece comprises a metal fixing needle which is used for penetrating through plastic to fix a product. The conductive sliding mechanism comprises a conductive piece which is used for being in contact with the metal base body. The metal fixing needle penetrates through the plastic, the plastic wraps the metal fixing needle, the product can be prevented from sliding off, and the product is stabilized on the frame to lay a conductive foundation for the conductive sliding mechanism.

A data analysis method for optimization of aluminum anodizing and dyeing process acquires a plurality of sample data groups, each sample data groups comprising dyeing result data and parameter data of multiple processing parameters. Contribution value of each processing parameter data relative to the dyeing result data in each of the plurality of sample data groups is determined, and the contribution values are used to determine at least one essential processing parameter. The essential processing parameters are then adjusted according to a data analysis result for improving quality of products. A computing device and storage medium are also provided.

The invention discloses an aviation aluminum material pulse anodic oxidation process, the aviation aluminum material pulse anodic oxidation process comprises a pretreatment step, an anodic oxidation step and a hole sealing step, electrolyte used in the anodic oxidation step is sulfuric acid and oxalic acid dihydrate composite electrolyte, the current is forward direct current pulse current, and the hole sealing step is a hole sealing step. The concentration of sulfuric acid in the electrolyte is 130-180 g / L, the concentration of oxalic acid dihydrate is 30-60 g / L, the current density of the forward direct current pulse current is 1.5-2.5 A / dm, and the ratio of current time to current-free time in the period of the pulse current is (3-5): 1. Through the mode, the finally obtained oxidation film layer is uniform and compact in structure, dye adsorption is uniform, firm and stable during dyeing, the hardness and the wear resistance are further improved, and the corrosion resistance and the insulating property are remarkably enhanced.

The invention relates to a surface treatment method of a hard anode, aims to solve the common problems of long oxidation working time, high energy consumption in the technical process and the like in the treatment process of hard anode oxidation, and provides a hard anode oxidation film-forming technical method which comprises the following steps: hanging, degreasing, alkali etching, film stripping, anode oxidation, hole sealing and hanging. Wherein an anodic oxidation tank solution for anodic oxidation comprises 140-180 g / L of sulfuric acid, 48-120 g / L of aluminum sulfate octadecahydrate and 3-7 g / L of a glycollic acid solution with the mass concentration of 25-30%; and / or the addition amount of sodium metasilicate in the hole sealing groove is 2-4g / L. The efficiency of an existing hard anodizing process is greatly improved, the production energy consumption is reduced, and the production cost is reduced.

This invention relates to the field of alloy materials and surface treatment technology, and discloses a high-quality anodized die-cast aluminum alloy formula. The high-quality anodized die-cast aluminum alloy formula comprises, by mass percentage: silicon ≤0.3%, iron ≤0.15%, magnesium 0.3%-0.8%, manganese 0.2%-0.5%, copper 0.01%-0.05%, strontium-titanium composite grain refiner 0.05%-0.15%, with the balance being aluminum and impurities; the mass ratio of strontium to titanium is 1:(2-5); it is obtained through melting, argon refining, low-pressure die casting, pretreatment, and anodizing. This method reduces the silicon-iron content, adds a strontium-titanium composite grain refiner to refine the grains, eliminates impurity phases, and solves the problems of color difference, pinholes, and film peeling after anodizing, obtaining a uniform and dense film and improving gloss.

A locking and fixing structure for anodic oxidation of a metal shell comprises a nut block, an expansion sleeve and a compression nut, one end of the nut block is connected with a first screw, the other end of the nut block is provided with a first conical surface, and the middle of the first conical surface is connected with a second screw; the expansion sleeve sleeves the second screw rod; an expansion strip is arranged at one end of the expansion sleeve; the upper half section of the expansion strip is arranged to be a concave groove surface; the groove surface is used for being matched with a locking hole of a metal shell; the compression nut is in threaded connection with the second screw rod, and the compression nut abuts against the end, away from the nut block, of the expansion sleeve; a fixing nut is connected to the first screw rod through threads and used for fixing the nut block to an external supporting structure. According to the utility model, the defects in the prior art are overcome, the bolt can be effectively prevented from loosening under the influence of external factors such as vibration or temperature change, the stability of the connection between the metal shell and the hanger is ensured, and the consistency and the reliability of the anodic oxidation process quality are improved.

The utility model discloses a kind of hangers for anodizing, including upper ring plate and lower ring plate, and there are several side plates between lower ring plate and upper ring plate, the outside of each side plate is equipped with a column fixed chuck that is arranged with up-down interval and extends outward, the lower of fixed chuck is equipped with the limiting hole that extends upward and downward and is opened on side plate, the movable chuck that is used in cooperation with fixed chuck is slidably connected in limiting hole, the inside of each side plate is equipped with a drive rod that extends upward and downward, the upper end of drive rod penetrates upper ring plate and moves axially relatively, the lower end of drive rod penetrates upper ring plate and moves axially relatively, the tail end of movable chuck is connected on drive rod, the upper end of drive rod is equipped with upper stop block, lower end extends lower ring plate, middle stop block between upper ring plate and lower ring plate is equipped on drive rod, and elastic member is sleeved on drive rod. The hanger has the characteristics of high discharging efficiency and convenient operation, and is perfect in overall function, with strong practicality.

This invention relates to the field of metal surface treatment technology, specifically to an anodizing pretreatment agent, its preparation method and application, and an anodizing method for 70 series aluminum alloys. In the anodizing pretreatment agent provided by this invention, nitric acid and / or sulfuric acid provide the basic acidity for descaling / cleaning the 70 series aluminum alloy, fluorides are used to activate the 70 series aluminum alloy surface and promote oxide removal, and Fe is introduced... 3+ The oxidation-assisted solution promotes the removal of residues on the surface of 7-series aluminum alloys, introduces organic carboxylate complexation to inhibit and reduce the redeposition of dissolved metal ions, thus reducing the formation of black and gray residues, and, in conjunction with a wetting agent, improves the processing uniformity of complex structural parts. The anodizing pretreatment agent provided by this invention offers a wider operating window and a more stable, uniform, and low-defect-rate pretreatment effect for the anodizing pretreatment of 7-series aluminum alloys, improving the consistency of anodized appearance and corrosion resistance, and significantly shortening the pretreatment process for 7-series aluminum alloys. It is also suitable for the pretreatment of complex parts.