99 results about "Anodic oxide" patented technology

The utility model belongs to the technical field of machining, and discloses a surface polishing device for a hard anodized layer of an aluminum alloy inner hole. One end of the mandrel and one end of the silica gel expansion sleeve are installed in a sealed mode; the other end of the silica gel expansion sleeve is fastened with the mandrel; the other end of the mandrel extends out of the silica gel expansion sleeve and is internally provided with a plug; the through hole is located in the outer circle of the mandrel in the silica gel expansion sleeve. Polishing abrasive paper is uniformly adhered to the silica gel expansion sleeve in the axial direction; and the actuating cylinder is sleeved outside the silica gel expansion sleeve. The pressure source is a pressure air source or a pressure water source. The aluminum alloy inner hole hard anodized layer surface polishing device can replace manual polishing, flexible expansion and contraction are achieved through the arrangement of the silica gel expansion sleeve, the polishing effect is good and even, the structure is simple, and economical efficiency is good.

The invention belongs to the field of aluminum alloy processing, and provides a method for evaluating the corrosion resistance of an anodic oxide film and the corrosion capacity of a semi-synthetic cutting fluid, which comprises the following steps of: respectively taking a corrosive liquid or the semi-synthetic cutting fluid as an electrolyte and simulating a corrosive environment, and then taking an aluminum alloy sample as a working electrode to evaluate the corrosion resistance of the anodic oxide film and the corrosion capacity of the semi-synthetic cutting fluid; performing an electrochemical test in a corrosion environment to obtain charge transfer resistance Rct and corrosion current density Icorr, and then calculating a corrosion resistance index CI; the higher the obtained corrosion resistance index CI value is, the higher the corrosion resistance of the anodic oxide film of the aluminum alloy sample is, or the lower the corrosion capacity of the semi-synthetic cutting fluid is. And the corrosion resistance of the anodic oxide film or the corrosivity of the semi-synthetic cutting fluid can be rapidly and accurately evaluated.

The invention belongs to the technical field of aluminum alloy materials, and particularly relates to a colored aluminum anode oxide film and a preparation method thereof. Aluminum is sequentially subjected to electrochemical polishing and anodic oxidation to obtain an aluminum anodic oxide film, then the aluminum anodic oxide film is immersed in an azo precursor solution, and a red azo dye is synthesized in situ in pores of the porous oxide film through an azo reaction between diazonium salt and benzene sulfonate, so that coloring of the aluminum oxide film is completed. By synthesizing sulfonic acid modified alendronate and compounding the sulfonic acid modified alendronate to form the electrochemical polishing solution, the electrochemical polishing quality of the surface of an aluminum sheet can be effectively improved. An electrolyte additive with phosphate groups, carboxyl groups and alcohol amino groups at the same time is used for anodic oxidation, a porous oxidation film with the appropriate pore size is formed, finally, an azo precursor of a specific structure is screened, loading fixation of azo dye on the porous film is further improved by means of sulfonic acid groups on azo molecules, and the stability of the anode is improved. And the aluminum oxide film with a good coloring effect is obtained.

The invention relates to the technical field of material surface treatment, and discloses a surface treatment method for an aluminum alloy with a fluorescent layer and an aluminum alloy workpiece. The surface treatment method for the aluminum alloy with the fluorescent layer comprises the following steps that S1, an aluminum alloy matrix is subjected to anodic oxidation treatment, and a porous anodic oxidation film is formed on the surface of the aluminum alloy matrix; s2, fluorescent ink is locally sprayed on the surface of the porous anodic oxide film, curing is carried out, a local fluorescent layer is formed, and the area where the fluorescent ink is not sprayed is a non-fluorescent area; s3, performing global dyeing on the porous anodic oxide film of the local fluorescent layer and the non-fluorescent region, and drying to form a global covered dyeing layer; and S4, hole sealing is conducted, a hole sealing layer covering the whole area is formed on the dyeing layer, and the aluminum alloy workpiece is prepared. When the UV lamp irradiates, fluorescent patterns are shown on the aluminum alloy workpiece, so that the functions of identity information recognition and counterfeiting prevention are achieved, and the aluminum alloy workpiece is excellent in corrosion resistance and wear resistance and meets the subdivision requirements in the fields of industry, consumption, safety and the like.

The invention discloses a surface treatment system and method based on new energy aluminum alloy parts, and relates to the technical field of aluminum alloy surface treatment.The system comprises a temperature regulation and control module, a current density adjustment module, an ion concentration real-time monitoring module, an oxidation reaction tank module and an electrolyte dynamic balance management module; through the synergistic effect of gradient porosity anodic oxide film control and electrolyte dynamic balance, the comprehensive performance of the new energy aluminum alloy part is remarkably improved, the inner layer compact structure of the gradient oxide film can effectively isolate water, oxygen and other corrosive media, and the part still has excellent corrosion resistance in the complex environment; the outer porous structure provides abundant anchoring points for a subsequent coating, the binding force of the coating and the aluminum alloy matrix is greatly enhanced, the phenomena of peeling, peeling and the like of the coating are avoided, and long-term stability of the appearance and the function of the part is guaranteed.

The invention provides an anodic oxidation film layer control method based on electrochemical regulation and control. The method comprises the steps that the metal ion concentration in anodic oxidation electrolyte is monitored in real time; adjusting electrolyte components based on the real-time concentration data; performing forced convection circulation on the electrolyte with optimized components in the vertical direction by driving the electrolyte, and applying a pre-polarization voltage lower than a formal oxidation stage; the method comprises the following steps: immersing a to-be-treated workpiece into an electrolyte with activated components, and applying electrochemical regulation and control based on a four-electrode mode; monitoring the growth rate of the preliminary oxidation film layer in real time; and optimal process parameters are predicted based on the growth rate data, and electrochemical regulation and control parameters are adjusted according to the optimal process parameters, so that the preliminary oxidation film layer continues to grow, and the anodic oxidation film layer is formed. Effective electrochemical driving force applied to the surface of the workpiece can be accurately controlled, control errors caused by solution resistance and temperature drift are overcome, and therefore high-precision and high-stability control over the oxidation film growth process is achieved.

A method for creating oil-filled porous anodic oxide coatings for stainless steel is disclosed. The coating has anti-corrosion and omniphobic properties to resist both atmospheric conditions, or other conditions with exposure to vapor, and wet conditions, in which the coating is exposed to and / or immersed in liquid. The anodic oxide coating of the present invention can be made by the steps of cleaning and / or electropolishing a steel substrate, applying anodic oxidation to the steel substrate, washing the steel substrate in an organic solvent, and annealing the substrate at high temperature. To fill the porous coating with an oil, a solvent exchange method may be applied.

The utility model provides an anti-interference high-heat-dissipation seven-layer circuit board, which sequentially comprises a conductive layer, a first insulating layer, a power supply layer, a second insulating layer, a grounding layer, a third insulating layer and a metal base layer from top to bottom, and graphene composite films are uniformly distributed and embedded on the edges of the sides of the metal base layer in order; a snakelike heat dissipation channel is formed in one side surface, close to the third insulating layer, of the metal base layer, and the snakelike heat dissipation channel is filled with a heat-conducting silicone grease layer; a heat conduction block is arranged at the position, away from the snake-shaped heat dissipation channel and the circuit area, of the metal base layer, and the heat conduction block is arranged close to the high heat dissipation area of the circuit board; a heat conduction block penetrates through the third insulating layer and is in contact with the grounding layer in an attached manner; the first insulating layer is provided with a plurality of honeycomb-shaped hexagonal grooves, and the honeycomb-shaped hexagonal grooves are filled with ferrite filling layers. And an anodic oxide layer is arranged on one side surface, far away from the third insulating layer, of the metal base layer. And the anti-interference and anti-corrosion functions are good, and the heat dissipation function is high.

The present invention relates to the technical field of anode foil pulse pore generation and specifically relates to a composite pulse waveform pore generation technology for a high-thickness aluminium foil anode foil. In the composite pulse waveform pore generation technology for a high-thickness aluminium foil anode foil of the present invention, a low-frequency pulse is used in the initial stage of pore generation, a high-frequency pulse is used in the middle and later stages of tunnel pore growth, and low-frequency pulsing is performed one more time after alternating between the low-frequency pulse and the high-frequency pulse several times, thereby optimizing the structure and properties of an anodic oxide film, refining pores, improving the density and uniformity of the pores, and significantly improving the specific capacitance and mechanical properties of a finished etched foil.

This invention relates to the technical fields of aircraft component processing, testing, and inspection, and provides a method for detecting surface defects in epoxy-coated aluminum alloy plates. The method involves applying an epoxy coating containing zinc yellow pigment onto an anodic oxide film to construct a coated test piece with color difference indication function, which is then exposed to a coastal atmospheric environment for sampling. During the detection process, data such as gloss loss rate, color difference, contact angle, defect area ratio, and corrosion current density are collected. A dynamic correction coefficient is calculated based on the degree of zinc yellow pigment hydrolysis, adaptively adjusting the threshold values ​​of each parameter and constructing a threshold set. Combining scanning electron microscopy image segmentation and Tafel extrapolation analysis, multi-source indicators are integrated to determine whether the coating has failed. This method can track the hydrolysis behavior of zinc yellow pigment in real time, automatically correct the judgment criteria for optical, morphological, and electrochemical indicators, and improve the accuracy and reliability of failure detection of epoxy-coated aluminum alloy plates under coastal service conditions.

The present application relates to a kind of welding-free tight-fitting sealing structure of lightweight electric control valve and its assembly method, in particular to electric control valve technical field.The present application includes shell, stainless steel piece, valve body, pressure ring washer, sealing ring and electromagnetic coil, valve body is made of aluminum alloy base material and surface covers anodic oxide layer, electromagnetic coil is aluminum coil, realize overall lightweight.Sealing ring is sleeved in the end of stainless steel piece and is in interference fit with shell and stainless steel piece, form reliable radial seal;Pressure ring washer is located at the intersection of shell, valve body and stainless steel piece, one side is pressed against the axial end surface of sealing ring, the other side is abutted with valve body, with axial positioning and sealing enhancement function;Shell and valve body are fixedly connected in tight fit, without welding.The structure avoids welding thermal deformation, sealing is reliable, assembly is convenient, and it is suitable for the application scene of electric control valve with strict requirements on weight and sealing.

An enclosure for an electronic device includes an aluminum alloy substrate and an anodic oxide coating disposed on the aluminum alloy substrate, the anodic oxide coating having a nano-scale etched pattern. The enclosure includes a matte-white finish having a flop index between about 2 and about 10. The anodic oxide coating has a L* value of greater than about 90, an a* value of less than about 1, and a b* value of less than about 2. The enclosure includes a sealant disposed on the anodic oxide coating, the sealant including a sol-gel coating, a hard-coat, an anodic electrophoretic deposition coating, or a combination thereof.

The present invention relates to a method for simultaneously achieving a superhydrophobic and superoleophobic surface on a 3,000 series aluminum alloy in an anodic oxidation process without a pre-patterning step, wherein a 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 due 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 has the effect of being applicable to the coating of a microstructured oxide film since the coating film thickness can be adjusted to several to several tens of nm, and the method can be useful for creating a machine learning database for developing 3,000 series aluminum alloy surface treatment technology.

The preparation method comprises the following steps that S1, an anodic oxidation base film is formed, specifically, an aluminum alloy workpiece subjected to surface treatment is subjected to anodic oxidation, the anodic oxidation base film with an anchoring groove is formed on the surface of the aluminum alloy workpiece, and the anodic oxidation base film is dried for standby application after being washed with water; s2, electrostatic powder spraying, melting and composite film forming: performing electrostatic powder spraying on the anodic oxidation base film obtained in the step S1 by taking polytetrafluoroethylene powder as a raw material, heating the aluminum alloy workpiece after spraying is completed, melting the polytetrafluoroethylene powder adsorbed on the surface of the aluminum alloy workpiece into a film, and naturally cooling to obtain the composite film. A composite film formed by compounding the anodic oxidation base film and polytetrafluoroethylene is obtained; and S3, magnetic control polishing is conducted, specifically, the composite film on the surface of the aluminum alloy workpiece in the S2 is polished and leveled through magneto-rheological polishing liquid, and then the aluminum alloy workpiece is obtained. The aluminum alloy composite anode oxide film prepared through the method has good abrasion resistance and corrosion resistance.

The present invention provides a multilayer ceramic dielectric for an inductor and an inductor using same, wherein a first anodic oxide film having a low porosity due to having relatively small pores or a relatively small number of pores is positioned on upper and lower surface layers, and a second anodic oxide film having a large porosity due to having relatively large pores or a relatively large number of pores is positioned on inner layers positioned between the upper and lower surface layers to make the dielectric constant high on the upper and lower surfaces and low in an inner region so that a current path operates efficiently on the surface sides, and the efficiency of magnetic field passage inside can be enhanced to improve high-frequency characteristics.

The present invention provides a method for manufacturing a structure that can be easily joined to a joining object. The method comprises: a conductive layer forming step of locally forming a conductive layer having conductivity on a surface of an insulating support having at least one surface; a valve metal layer forming step of forming a valve metal layer that covers at least a portion of the conductive layer; an anodic oxide film forming step of performing an anodic oxidation treatment using the conductive layer as an electrode to form the valve metal layer in a region above the conductive layer into an anodic oxide film; a micropore forming step of forming a plurality of micropores extending in the thickness direction of the anodic oxide film; and a filling step of filling the micropores with a conductive substance, wherein a valve metal layer removal step of removing the valve metal layer after the anodic oxide film forming step is included between the anodic oxide film forming step and the filling step.

The present disclosure relates to a method for forming a film on a metal member, the method including the following steps.　A first step for forming linear recesses at prescribed intervals on the surface of the metal member, a second step for forming an anodic oxide film on the surface of the metal member on which the recesses are formed, a third step for heat-treating the metal member on which the anodic oxide film is formed to form cracks in the anodic oxide film, and a fourth step for sealing the metal member on which the anodic oxide film is formed to fill the cracks with a hydrate.　Furthermore, the present disclosure also includes a method for manufacturing a member manufactured using the aforementioned film formation method, and a plasma processing device comprising the member.

The invention provides an environment-friendly hole sealing method and hole sealing liquid for an aluminum alloy anode oxide film, and relates to the technical field of metal surface protection treatment. The environment-friendly hole sealing method for the aluminum alloy anodic oxide film comprises the steps that an aluminum alloy workpiece is put into hole sealing liquid to be subjected to hole sealing treatment, and the hole sealing treatment temperature is 40-70 DEG C. By adopting the environment-friendly lithium vanadate hole sealing liquid, efficient hole sealing of the aluminum alloy anode oxide film is achieved under the mild condition of 40-70 DEG C, the problem of heavy metal pollution of a traditional technology is solved, and the corrosion resistance of the film layer is remarkably improved.

The invention relates to the technical field of preparation of electrolytic capacitors, in particular to a preparation method of a chip polymer laminated aluminum electrolytic capacitor, which comprises the following steps of: S1, removing an oxidation film on the surface of a core anode to obtain a first core; s2, the anode surface and the cathode surface of the first core are bonded through ACF adhesive tape, and a second core is obtained; s3, a plurality of second cores are stacked and then subjected to hot-pressing curing treatment, and a capacitor core package is obtained; s4, packaging, aging and forming treatment are conducted on the capacitor core package, and the solid aluminum electrolytic capacitor is obtained.According to the solid aluminum electrolytic capacitor, the anodic oxide film removing technology and the ACF adhesive tape bonding technology are adopted, and the hot pressing mode is combined; the problems of insufficient welding strength, welding slag phenomenon, silver paste bonding operation, uneven stress caused by a fan-shaped structure and the like in the prior art can be effectively solved, and the electrical performance and the reliability of the product are improved. And meanwhile, by using the ACF adhesive tape, the operation process is more stable and controllable, and industrial production can be realized.

The invention discloses an anodic oxide film detection system which comprises a conveying module, a preprocessing module, a multi-dimensional detection module, a data processing module, a sorting module and a central control module. The conveying module is used for conveying an anodic oxide film workpiece to be detected to each functional module according to a preset speed and path; the pretreatment module is arranged on a conveying path of the conveying module and is used for cleaning and drying the surface of a to-be-detected workpiece; and the multi-dimensional detection module is arranged on the conveying path behind the preprocessing module and is used for carrying out multi-parameter detection on the preprocessed workpieces. According to the anodic oxide film detection system disclosed by the invention, the problems of low detection efficiency, poor detection precision, single detection parameter, insufficient pretreatment, weak data processing capability, low sorting efficiency and the like in anodic oxide film detection in the prior art are solved.

The present invention provides a component using an anodic oxide film and including a three-dimensional electrode layer, and a manufacturing method therefor.

The invention discloses an electric tool shell anode oxide layer impact resistance detection device, and relates to the technical field of electric tool detection.The electric tool shell anode oxide layer impact resistance detection device comprises a detection box, an impact detection mechanism is arranged at the top of the inner side of the detection box, a positioning mechanism is arranged at the bottom of the inner side of the detection box, and the detection box comprises a box body shell; the impact detection mechanism comprises a wind-up roller, and one end of the wind-up roller is provided with a first motor. The controllable electromagnetic block and the iron disc are released and separated, so that the impact head freely falls to impact the electric tool shell, and the impact resistance of the anodic oxide layer can be conveniently, rapidly and efficiently detected; in the detection process, different numbers of balancing weights can be placed on the top of the lifting sliding frame according to test strength requirements to change impact strength, so that test parameters are changed, adjustment can be conveniently carried out according to different requirements, the test range is effectively widened, and the detection efficiency and universality are guaranteed.

To provide a cylinder block for an outboard motor and its manufacturing method capable of forming a screw hole having a predetermined inner diameter even if the cylinder block for the outboard motor is subjected to anodic oxidation treatment, preventing corrosion of a base material due to remaining of treatment liquid, and further improving corrosion resistance to cooling water such as seawater.SOLUTION: Then, the temporary hole 31 is threaded to remove the anodic oxide film in the temporary hole and form the screw hole 34 in which the aluminum alloy is exposed to the inner peripheral surface, and then the chemical conversion film 35 is formed on the surface of the sealed anodic oxide film 32 and the surface of the aluminum alloy exposed to the inner peripheral surface of the screw hole 34.SELECTED DRAWING: Figure 4

The utility model provides a corrosion-resistant die-casting aluminum alloy ingot, and relates to the technical field of aluminum alloy ingots. The corrosion-resistant die-casting aluminum alloy ingot comprises an aluminum alloy ingot body, fixing blocks are fixed to the two sides of the aluminum alloy ingot body correspondingly, connecting blocks are fixed to the separated ends of the two fixing blocks correspondingly, limiting frames are fixed to the two sides of the aluminum alloy ingot body correspondingly, and limiting grooves are formed in the separated sides of the two limiting frames correspondingly; two upper grooves are formed in the upper side of the aluminum alloy ingot body. According to the corrosion-resistant die-casting aluminum alloy ingot, the two aluminum alloy ingots are drawn close to each other in a back-to-back state through manpower, the stable clamping effect is achieved, the aluminum alloy ingots can be tightly connected into a whole, and then the effect of improving the use stability of the aluminum alloy ingots is achieved; according to the aluminum alloy ingot composed of the fluorocarbon coating, the ceramic coating, the anodic oxidation film layer, the rare earth conversion film layer, the corrosion-resistant alloy layer and the chromate conversion film layer, the corrosion-resistant effect of the aluminum alloy ingot is achieved, and the effect of improving the using effect of the aluminum alloy ingot is achieved.

The invention discloses a method for inhibiting cracking of an aluminum alloy anodic oxide film through multi-section current regulation and control, and the method comprises the steps of pretreatment, anodic oxidation and sealing treatment of an aluminum alloy in sequence, anodic oxidation comprises five stages of low-density compact nucleation, stepped current rising linear growth, constant current maintenance and stress balance, active current falling stress release and stable growth. In the step current rising linear growth stage, the current density is gradually increased to 2.5-4.0 A / dm < 2 > in a step mode, after the current density is maintained for a period of time, the current density is firstly reduced to a low range (0.7-1.15 A / dm < 2 >), and finally the current density is slightly increased to a proper value, so that the anodic oxide film grows at the low current density. According to the invention, through accurate regulation and control of multi-segment current, the internal stress of the film layer in the whole growth process is always controlled to be below a safety threshold, and the finally obtained oxide film is compact in microstructure and completely free of visible microcracks.

An aluminum member (1) includes: a base material (2) composed of aluminum or an aluminum alloy; and an anodic oxide film (3) formed on a surface of the base material. The anodic oxide film includes: an amorphous layer (31), which is composed of an amorphous aluminum oxide and is formed on the base material (2); and a crystal layer (32), which is composed of a crystalline aluminum oxide and is formed on the amorphous layer (31). The aluminum member (1) can be obtained by forming the anodic oxide film (3) on the base material (2) by performing an anodization process on the base material (2) in an electrolytic solution, which contains boron atoms and has a pH of 7.0-12.0.

The invention provides a pretreatment method for reducing the roughness of a hard anodic oxide film, which comprises the following steps: grinding and polishing a base material to obtain a surface-polished base material; the surface-polished base material is sequentially subjected to first acid pickling, alkali washing and second acid pickling, nitric acid is used for the first acid pickling, nitric acid is used for the second acid pickling, and pretreatment is completed; and the pretreated base material is subjected to hard anodic oxidation and hole sealing. According to the pretreatment method provided by the invention, the surface of the base material is firstly ground and polished, the surface roughness is preliminarily adjusted, and then the microstructure of the surface of the base material is improved through specific acid washing and alkali washing processes, so that the roughness of the generated hard anode oxide film is reduced, and the performance and the appearance of the hard anode oxide film are improved.

The invention relates to the field of metal product manufacturing, in particular to a preparation method of a gradient composite aluminum anode oxide film and an aluminum product, and the method comprises the following steps that an aluminum substrate is placed in an electrolyte to be subjected to staged anodic oxidation treatment which comprises the following steps that in the first stage, anodic oxidation is conducted under the condition that no nanometer functional material is added; in the second stage, anodic oxidation is carried out in an electrolyte containing a nanometer functional material; and in the anodic oxidation treatment process of the second stage, the concentration change of the nano functional material in the electrolyte is controlled, so that the content of the nano functional material in the oxidation film is in gradient distribution in the thickness direction of the film layer. According to the invention, through staged oxidation and dynamic concentration control, synergistic enhancement of film performance is realized, a compact structure taking pure alumina as a main component is formed in an inner layer close to a matrix, excellent adhesion and toughness are ensured, a nano functional material is enriched on a surface layer, and functionality of surface hardness or self-lubrication and the like is significantly improved.

The invention relates to a composite material and a preparation method and application thereof, and the composite material comprises a base material, and an anodic oxide film layer, a basic plating layer, a functional plating layer and a color plating layer which are sequentially arranged on one surface of the base material from inside to outside, the functional plating layers comprise a plurality of first functional plating layers and a plurality of second functional plating layers which are alternately arranged; metal elements in the first functional plating layer are different from metal elements in the second functional plating layer, or the first functional plating layer contains metal elements and the second functional plating layer does not contain metal elements. According to the composite material provided by the invention, the plurality of first functional plating layers and the plurality of second functional plating layers are alternately arranged, so that the longitudinal resistance values of the functional plating layers are increased, the corrosion of a primary battery during a corrosion test is weakened, meanwhile, the compactness of the functional plating layers is also improved, the defects of a film layer are reduced, and the service life of the film layer is prolonged. And the wear resistance of the composite material is enhanced.

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.