WO2020257992A1 - Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000 - Google Patents

Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000 Download PDF

Info

Publication number
WO2020257992A1
WO2020257992A1 PCT/CN2019/092593 CN2019092593W WO2020257992A1 WO 2020257992 A1 WO2020257992 A1 WO 2020257992A1 CN 2019092593 W CN2019092593 W CN 2019092593W WO 2020257992 A1 WO2020257992 A1 WO 2020257992A1
Authority
WO
WIPO (PCT)
Prior art keywords
aluminum alloy
solution
concentration
acid
oxide film
Prior art date
Application number
PCT/CN2019/092593
Other languages
English (en)
Chinese (zh)
Inventor
陈文泗
罗伟浩
罗铭强
林丽荧
李辉
金娜
王顺成
Original Assignee
广东兴发铝业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广东兴发铝业有限公司 filed Critical 广东兴发铝业有限公司
Priority to PCT/CN2019/092593 priority Critical patent/WO2020257992A1/fr
Publication of WO2020257992A1 publication Critical patent/WO2020257992A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/16—Pretreatment, e.g. desmutting
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • C25D11/22—Electrolytic after-treatment for colouring layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment

Definitions

  • the invention belongs to the technical field of aluminum alloy surface treatment, and specifically relates to an oxidation coloring method for appearance parts of a 7000 series aluminum alloy electronic product.
  • Aluminum alloy has the advantages of light weight, high specific strength, good heat dissipation performance, recyclability, and unique metal texture. It is widely used in the appearance of smart phones, tablet computers and other electronic products, such as backplanes, middle frames and frames. With the development of economy and society, consumers’ consumption concepts are constantly updated and their needs are becoming more diversified. This puts forward higher requirements on the appearance of electronic products, which require both beautiful decorative effects and excellent wear resistance. Corrosion resistance.
  • a layer of natural oxide film is formed on the surface of aluminum alloy appearance parts, which has a certain resistance to corrosion, but the natural oxide film is very thin and soft, and is easily damaged and loses its protective effect.
  • the surface hardness of aluminum alloy is low, and the surface of aluminum alloy appearance parts is easily worn out during use.
  • the appearance parts of existing electronic products such as smart phones and tablet computers are mainly made of 6000 series aluminum alloy. Although 6000 series aluminum alloy has excellent extrusion processing performance and oxidation coloring effect, its strength is generally low. With the development of large screens and thinner electronic products such as smart phones and tablet computers, there is an urgent need for high-strength aluminum alloy backplanes, middle frames or frames to improve the bending resistance of the fuselage to avoid bending when the fuselage is under pressure. , Bending and other phenomena. Especially with the advent of the 5G communication era, because aluminum alloy has a shielding effect on electromagnetic waves, the existing aluminum alloy middle frame + aluminum alloy backplane shell structure can no longer meet the transmission needs of smartphone 5G communication signals, and aluminum must be used. Alloy middle frame + glass or ceramic shell structure. Therefore, in order to prevent the glass and ceramics from cracking due to the deformation of the aluminum alloy frame when the smartphone is dropped, there is an urgent need for high-strength aluminum alloy to make the smartphone frame.
  • 7000 series aluminum alloy is a high-strength aluminum alloy that can be strengthened by heat treatment.
  • the strength of 7000 series aluminum alloy is generally higher, which can meet the development requirements of large-screen and light-weight electronic products such as smart phones and tablet computers.
  • the oxidation coloring effect of 7000 series aluminum alloy is relatively poor.
  • the existing commonly used oxidation coloring process generally has the problems of turbid oxide film, poor permeability and low gloss, which makes it impossible to obtain various appearance parts of 7000 series aluminum alloy electronic products. Pure color.
  • the oxide film generally has problems such as poor compactness, weak adhesion, and easy to fall off, so that the appearance of 7000 series aluminum alloy electronic products cannot obtain good wear resistance and corrosion resistance. Therefore, the oxidation coloring method of the existing 7000 series aluminum alloy electronic product appearance parts still needs to be improved and developed.
  • the present invention provides a 7000 series aluminum alloy electronic product appearance part oxidation coloring method.
  • the gloss, permeability, and permeability of the oxide film are improved. Density and adhesion, improve the wear resistance, corrosion resistance and surface decoration effect of 7000 series aluminum alloy electronic products.
  • the oxidation coloring method of the 7000 series aluminum alloy electronic product appearance parts of the present invention is characterized by sequentially including the following steps:
  • the first step the surface mechanical pretreatment of the aluminum alloy appearance parts, to remove the surface machining knife marks, burrs, scratches, etc., to obtain a smooth surface, the surface mechanical pretreatment is mechanical polishing or sandblasting;
  • surface mechanical pretreatment of aluminum alloy appearance parts is to remove surface machining knife marks, burrs, scratches, etc., to obtain a smooth surface.
  • Commonly used surface mechanical pretreatment methods include mechanical polishing and sandblasting. Mechanical polishing is performed on a special polishing machine, using the relative grinding and rolling effects between polishing powder, cotton or felt and other polishing materials and aluminum alloy appearance parts. , Remove the convex part of the surface to obtain a flat surface method.
  • Sandblasting is powered by compressed air to spray abrasive grains on the surface of aluminum alloy appearance parts at high speed. Under the combined action of the impact force and cutting force of the abrasive grains, the surface machining knife marks, burrs, scratches, etc. are removed. The way to get a flat surface.
  • Surface mechanical pretreatment is a conventional pretreatment process for aluminum alloy appearance parts. If you need to obtain a bright and flat surface, you usually choose mechanical polishing. If you need to obtain a matt and flat surface, usually choose sandblasting. For specific requirements, choose mechanical polishing or sandblasting.
  • Step 2 Put the aluminum alloy exterior parts into a degreasing solution at 80-90°C for 7-8 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, and carbonated
  • the concentration of sodium is 60 ⁇ 80g/L
  • the concentration of sodium phosphate is 30 ⁇ 40g/L
  • the concentration of sodium citrate is 10 ⁇ 15g/L;
  • Aluminum alloy appearance parts will inevitably come into contact with oily substances during the manufacturing process. These oily substances must be completely removed by degreasing treatment to provide clean aluminum alloy appearance parts for the subsequent surface treatment process. However, the degreasing treatment can not produce corrosion on the appearance of aluminum alloy parts, otherwise it will affect the effect of the entire surface treatment.
  • the inventor has conducted a large number of experimental studies on the degreasing treatment process of the appearance parts of 7000 series aluminum alloy electronic products and found that the effect of degreasing treatment is closely related to the composition of the degreasing liquid, the temperature of the degreasing liquid and the degreasing time.
  • Sodium carbonate and The mixed aqueous solution of sodium phosphate is used as the base solution of the degreasing solution.
  • the concentration of sodium carbonate is 60 ⁇ 80g/L
  • the concentration of sodium phosphate is 30 ⁇ 40g/L
  • sodium citrate with the concentration of 10 ⁇ 15g/L is added as anionic surfactant.
  • the third step Put the cleaned aluminum alloy appearance parts in an alkaline washing solution at 25-30°C for 2 to 3 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is sodium hydroxide and sodium silicate.
  • the mixed aqueous solution, the concentration of sodium hydroxide is 20-25g/L, and the concentration of sodium silicate is 10-15g/L;
  • a layer of natural oxide film is usually formed on the surface of aluminum alloy appearance parts. This natural oxide film must be removed to expose the clean and well-activated aluminum alloy appearance parts to facilitate subsequent anodization and improve the efficiency of subsequent anodization. And the denseness of the oxide film.
  • the prior art usually uses an aqueous sodium hydroxide solution as an alkaline washing solution for alkaline washing, but it is often difficult to completely remove the natural oxide film on the surface.
  • the inventor found through a large number of experimental studies that the use of a mixed aqueous solution of sodium hydroxide and sodium silicate as an alkaline washing solution has a better effect than the traditional sodium hydroxide aqueous solution.
  • the sodium hydroxide concentration is 20-20g/L
  • Sodium silicate concentration is 10 ⁇ 15g/L
  • alkali washing solution temperature is 25 ⁇ 30°C
  • alkali washing treatment for 2 ⁇ 3 minutes it can completely remove the natural oxide film on the surface of aluminum alloy appearance parts, revealing clean and good activation state
  • the appearance of aluminum alloy parts improves the efficiency of subsequent anodization and the compactness of the oxide film.
  • Step 4 Put the cleaned aluminum alloy appearance parts in a pickling solution at 25-30°C for 1 to 2 minutes to remove dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid ,
  • concentration of nitric acid is 110 ⁇ 130g/L
  • concentration of sulfuric acid is 30 ⁇ 40g/L
  • concentration of formic acid is 10 ⁇ 20g/L;
  • 7000 series aluminum alloy electronic products usually contain Si, Cu, Fe, Mn and other elements and their intermetallic compounds. These elements and their intermetallic compounds are insoluble in alkaline solution. After the third step of alkaline washing treatment, It is usually attached to the surface of aluminum alloy appearance parts in the state of tiny particles, which is called fouling. Fouling will not only affect the subsequent chemical polishing effect, but also reduce the gloss and permeability of the oxide film. Therefore, it must be removed Dirt on the surface.
  • the inventor has conducted a large number of experimental studies on this problem and found that the use of a mixed aqueous solution of nitric acid, sulfuric acid and formic acid as the pickling solution has a better effect than a single nitric acid or sulfuric acid solution, and the pickling efficiency is higher and can be significantly shortened.
  • Pickling time under the conditions of nitric acid concentration of 110 ⁇ 130g/L, sulfuric acid concentration of 30 ⁇ 40g/L, formic acid concentration of 10 ⁇ 20g/L, and pickling solution temperature of 25 ⁇ 30°C, pickling treatment 1 ⁇ 2 Minutes, can completely remove the dirt on the surface of aluminum alloy appearance parts, and significantly improve the gloss and permeability of the oxide film.
  • Step 5 Put the cleaned aluminum alloy appearance parts into a 50-60°C polishing solution for chemical polishing for 30-40 seconds to obtain a smooth and bright surface.
  • the polishing solution is made of phosphoric acid, sulfinic acid and phenylacetic acid.
  • the volume percentage of phosphoric acid is 65 to 70%
  • the volume percentage of sulfinic acid is 20 to 22%
  • the volume percentage of phenylacetic acid is 10 to 13%
  • Chemical polishing is the process of putting aluminum alloy in a polishing liquid, and selectively dissolving uneven areas on the surface through the chemical etching of the polishing liquid, etching and leveling, and obtaining a smooth and bright surface.
  • the effect of chemical polishing is closely related to the composition of the polishing liquid, the temperature of the polishing liquid and the time of chemical polishing.
  • the existing commonly used polishing liquids usually contain nitric acid, and the biggest problem is that it generates NOx gas, which causes serious environmental pollution.
  • the chemical polishing effect of the existing phosphoric acid-sulfuric acid system polishing liquid is still difficult to obtain high-gloss aluminum alloy appearance parts, which seriously affects the beautiful decorative effect.
  • the inventor has conducted a lot of experimental research on the chemical polishing process of the appearance parts of 7000 series aluminum alloy electronic products and found that a mixture of phosphoric acid, sulfinic acid, and phenylacetic acid is used as the polishing liquid, and the volume percentage of phosphoric acid is 65-70%.
  • the volume percentage of sulfinic acid is 20-22%
  • the volume percentage of phenylacetic acid is 10-13%
  • the chemical polishing is 30-40 seconds in the polishing liquid at 50-60°C. It can be etched and leveled thoroughly to obtain a bright and smooth surface. , At the same time, it will not produce NOx gas and cause environmental pollution.
  • the temperature of the polishing liquid is too high or the polishing time is too long, it is easy to cause defects such as pitting, local stains or spots on the surface of the aluminum alloy appearance part. If the temperature of the polishing liquid is too low or the polishing time is not enough, it will not be completely etched and leveled. Eventually, the oxide film will be loose, which will reduce the wear resistance and corrosion resistance of aluminum alloy appearance parts and beautify the decoration effect.
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 20-22°C for 30-40 minutes to form a microporous oxide film on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, Mixed aqueous solution of aluminum sulfate and alkylphenol, sulfuric acid concentration is 140 ⁇ 150g/L, oxalic acid concentration is 8-9g/L, aluminum sulfate concentration is 15-20g/L, alkylphenol concentration is 2 ⁇ 3g/L, anode
  • the oxidized direct current density is 1.6 ⁇ 1.8A/dm2, the voltage is 8 ⁇ 10V, and the anodized cathode is lead plate or graphite plate;
  • Anodizing is to put the aluminum alloy appearance part as an anode into an oxidation solution, with a lead plate or graphite plate as a cathode, and under the action of an external current, a layer of microporous oxide film is formed on the surface of the aluminum alloy appearance part.
  • the formation of the oxide film is the result of the following two reactions simultaneously.
  • One is the electrochemical formation process of the oxide film, that is, the oxygen atoms ionized on the surface of the aluminum alloy appearance part react with aluminum to form an Al2O3 oxide film, and the other is formed
  • the chemical dissolution process of the oxide film, that is, the generated oxide film is partially dissolved by the oxidizing liquid at the same time.
  • the quality of the oxide film is firstly closely related to the composition of the oxidizing solution.
  • the existing common sulfuric acid anodizing process has the advantages of simple oxidizing solution composition, easy operation, porous oxide film, and strong adsorption capacity, it has loose oxide film, Defects such as poor permeability and low gloss.
  • the inventor conducted a lot of experimental research on the composition of the oxidation solution for the appearance of the 7000 series aluminum alloy electronic products, and found that on the basis of the traditional sulfuric acid oxidation solution, oxalic acid with a concentration of 8-9g/L and a concentration of 15-20g was added.
  • oxalic acid with a concentration of 8-9g/L and a concentration of 15-20g was added.
  • /L aluminum sulfate and alkylphenol with a concentration of 2 ⁇ 3g/L.
  • oxalic acid is an organic acid.
  • Oxalic acid dissolves the oxide film weaker than sulfuric acid, thereby reducing the dissolution of the micropore pore walls and forming a fine and uniform oxide film The micropores improve the adsorption capacity of the oxide film and improve the subsequent coloring effect.
  • Aluminum sulfate can separate aluminum ions in the oxidizing solution, increase the current stability of the oxidizing solution, accelerate the film formation speed, and avoid the oxide film's defects such as looseness, powdering and cracking, and increase the integrity and thickness of the oxide film. Obtain a continuous, uniform and dense oxide film layer, and improve the wear and corrosion resistance of the oxide film.
  • alkyl phenol has a cleaning effect on the oxide film, which can avoid dark spots, black spots and chromatic aberrations on the oxide film, thereby significantly improving the gloss and permeability of the oxide film, so that the oxide film can be colored Obtain gorgeous colors and improve beautification and decoration effects.
  • the quality of the oxide film is also closely related to the process parameters of anodization.
  • Increasing the current density can speed up the growth rate of the oxide film, but if the current density is too large, the growth rate of the oxide film will not speed up, but will tend to stop.
  • the thickness of the oxide film is thin, the oxidation time is too long, the oxide film is too thick, and the permeability of the oxide film is poor.
  • the inventor found that the temperature of the oxidizing solution is 20-22°C, the direct current density is 1.6-1.8A/dm2, the voltage is 8-10V, and the oxidation time is 30-40 minutes. The appearance of electronic products is anodized, and finally a continuous oxide film with high density, high gloss and good permeability with micropores can be obtained.
  • the oxide film has excellent coloring effect and wear resistance and corrosion resistance.
  • Step 7 Put the cleaned aluminum alloy appearance parts in a dyeing solution for coloring, so that the dye is deposited into the holes of the oxide film to obtain a brilliant color, and the coloring is organic dyeing or electrolytic dyeing;
  • Organic dyeing is a coloring method that uses the high porosity and strong adsorption capacity of the oxide film to adsorb chemical dyes in the pores of the film.
  • Electrolytic coloring is to put anodized aluminum alloy appearance parts into a metal salt solution, and under the action of electric current, metal particles or metal compounds are electrolytically deposited in the film pores of the oxide film, and the incident light is affected by the metal particles and metal compounds. It absorbs and scatters to produce a color rendering effect, and the color depth is mainly determined by the amount of metal particles deposited.
  • Organic dyeing is fast, diverse in color and easy to operate. After the sealing process, the dye can be firmly attached to the film hole.
  • the weather resistance, light resistance and service life of electrolytic coloring are better than those of organic dyeing, but the color of electrolytic coloring is currently more monotonous. You can choose organic dyeing or electrolytic coloring according to the specific color requirements of 7000 series aluminum alloy electronic products. Get gorgeous colors.
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 4.5-5.0 and a temperature of 80-85°C for sealing treatment for 3 to 5 minutes, sealing the micropores on the oxide film, and washing and drying The appearance part of the 7000 series aluminum alloy electronic product is obtained.
  • sealing Before sealing, it is necessary to clean the aluminum alloy appearance parts with water to remove the staining solution remaining on the surface. In order to maintain the color of the colored oxide film, avoid contamination, and improve the abrasion and corrosion resistance of the oxide film, sealing should be carried out in time after washing.
  • aluminum alloy appearance parts are mainly sealed by boiling water, that is, the aluminum alloy appearance parts are placed in boiling water.
  • the anhydrous Al2O3 on the surface of the oxide film and the pore walls is first hydrated into a monohydrate compound, and the volume is increased by more than 30%. When it is converted into a trihydrate, the volume will increase by more than 100% compared to the original, thereby sealing the micropores on the oxide film. After sealing, the dye is fixed in the membrane pores and the oxide film becomes non-porous and dense.
  • the effect of boiling water sealing is closely related to the pH value, temperature and sealing treatment time of boiling water.
  • the inventor conducted a large number of experiments on the boiling water sealing process of the appearance parts of 7000 series aluminum alloy electronic products and found that the use of boiling water with a pH value of 4.5 to 5.0 and a temperature of 80 to 85°C, sealing treatment for 3 to 5 minutes, can completely Close the micropores on the oxide film to obtain a uniform and dense oxide film on the surface, and improve the wear and corrosion resistance of the oxide film. If the water temperature is lower than 80°C or the time is less than 3 minutes, the micropores cannot be completely sealed. If the water temperature is higher than 85°C or the time is longer than 5 minutes, although the micropores can be closed, the surface will be uneven, which will reduce the quality of the sealing, resulting in the corrosion and wear resistance of the oxide film.
  • the 7000 series aluminum alloy in the present invention refers to an aluminum alloy with Zn as the main alloy element.
  • the 7000 series aluminum alloy is composed of the following components by mass percentage: Zn 5.0-6.0%, Mg 0.5-1.0%, Zr 0.15-0.25%, Fe ⁇ 0.15%, Si ⁇ 0.1%, Ti ⁇ 0.1%, The rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%.
  • the 7000 series aluminum alloy is composed of the following components by mass percentage: Zn 4.0-5.0%, Mg 1.2-1.8%, Mn 0.3-0.6%, Fe ⁇ 0.15%, Si ⁇ 0.1%, Ti ⁇ 0.1%, The rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%.
  • the 7000 series aluminum alloy is composed of the following components by mass percentage: Zn 5.5 ⁇ 6.5%, Mg 1.5 ⁇ 2.5%, Cu 1.5 ⁇ 2.5%, Fe ⁇ 0.15%, Si ⁇ 0.1%, Ti ⁇ 0.1%, The rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%.
  • the present invention Compared with the prior art, the present invention has the following beneficial effects: the present invention uses the degreasing liquid, alkaline washing liquid, pickling liquid, polishing liquid, oxidizing liquid composition and its treatment process of the appearance parts of 7000 series aluminum alloy electronic products. Parameters are optimized to improve the density of the oxide film.
  • the oxide film has strong adhesion, not easy to fall off, good permeability, and high gloss. After coloring and sealing, the color is pure and bright, which can significantly improve the 7000 series aluminum alloy electronics The wear resistance, corrosion resistance and surface decoration effect of the appearance parts of the product.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 5.6%, Mg 0.8%, Zr 0.19%, Fe 0.14%, Si 0.08%, Ti 0.06, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy exterior parts into a degreasing solution at 85°C for 8 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 70g /L, the concentration of sodium phosphate is 35g/L, and the concentration of sodium citrate is 12g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into an alkaline washing solution at 30°C for 2.5 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium silicate.
  • the concentration of sodium hydroxide is 23g/L and the concentration of sodium silicate is 12g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a pickling solution at 25°C for 1.5 minutes to remove dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 120g/L, sulfuric acid concentration is 35g/L, formic acid concentration is 15g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a polishing solution at 55°C for 35 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid, sulfinic acid, and phenylacetic acid.
  • the volume percentage is 67%, the volume percentage of sulfinic acid is 21%, and the volume percentage of phenylacetic acid is 12%;
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 21°C for 35 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, aluminum sulfate and alkane.
  • the mixed aqueous solution of base phenol, the concentration of sulfuric acid is 15g/L, the concentration of oxalic acid is 8g/L, the concentration of aluminum sulfate is 18g/L, the concentration of alkylphenol is 2.5g/L, the direct current density of anodizing is 1.7A/dm2, the voltage 9V, the anodized cathode is lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 4.8 and a temperature of 82°C for sealing treatment for 4 minutes to close the micropores on the oxide film, and obtain the 7000 series aluminum after cleaning and drying Appearance of alloy electronic products.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 4.7%, Mg 1.5%, Mn 0.5%, Fe 0.13%, Si 0.07%, Ti 0.5%, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy exterior parts into a degreasing solution at 80°C for 8 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 80g /L, the concentration of sodium phosphate is 30g/L, and the concentration of sodium citrate is 15g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into an alkaline washing solution at 30°C for 2 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium silicate.
  • concentration of sodium hydroxide is 20g/L
  • concentration of sodium silicate is 15g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a pickling solution at 25°C for 2 minutes to remove the dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 130g/L, sulfuric acid concentration is 30g/L, formic acid concentration is 20g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a 60°C polishing solution for chemical polishing for 30 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid, sulfinic acid, and phenylacetic acid.
  • the volume percentage is 70%, the volume percentage of sulfinic acid is 20%, and the volume percentage of phenylacetic acid is 10%;
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 20°C for 40 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, aluminum sulfate and alkane.
  • a mixed aqueous solution of base phenol the concentration of sulfuric acid is 140g/L, the concentration of oxalic acid is 9g/L, the concentration of aluminum sulfate is 20g/L, the concentration of alkylphenol is 2g/L, the direct current density of anodizing is 1.6A/dm2, and the voltage is 10V, the anodized cathode is lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 5.0 and a temperature of 80°C for sealing treatment for 5 minutes to seal the micropores on the oxide film, and obtain the 7000 series aluminum after washing and drying Appearance of alloy electronic products.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 6.3%, Mg 2.1%, Cu 1.9%, Fe 0.15%, Si 0.07%, Ti 0.08%, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy appearance parts into a 90°C degreasing solution for 7 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 60g /L, the concentration of sodium phosphate is 40g/L, and the concentration of sodium citrate is 10g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into an alkaline washing solution at 25°C for 2 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium silicate.
  • concentration of sodium hydroxide is 25g/L
  • concentration of sodium silicate is 10g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a 30°C pickling solution for 1 minute to remove dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 110g/L, sulfuric acid concentration is 40g/L, formic acid concentration is 10g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a 50°C polishing solution for chemical polishing for 40 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid, sulfinic acid, and phenylacetic acid.
  • the volume percentage is 65%, the volume percentage of sulfinic acid is 22%, and the volume percentage of phenylacetic acid is 13%;
  • Step 6 Put the cleaned aluminum alloy exterior parts into an oxidizing solution at 22°C for 30 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, aluminum sulfate and alkane.
  • a mixed aqueous solution of base phenol the concentration of sulfuric acid is 150g/L, the concentration of oxalic acid is 8g/L, the concentration of aluminum sulfate is 15g/L, the concentration of alkylphenol is 3g/L, the direct current density of anodizing is 1.8A/dm2, and the voltage is 8V, the anodized cathode is lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 4.5 and a temperature of 85°C for sealing treatment for 3 minutes to close the micropores on the oxide film, and obtain the 7000 series aluminum after cleaning and drying. Appearance of alloy electronic products.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 5.6%, Mg 0.8%, Zr 0.19%, Fe 0.14%, Si 0.08%, Ti 0.06, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy exterior parts into a degreasing solution at 85°C for 8 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 70g /L, the concentration of sodium phosphate is 35g/L, and the concentration of sodium citrate is 12g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into alkaline washing solution at 30°C for 2.5 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium nitrate, hydrogen
  • the concentration of sodium oxide is 23g/L and the concentration of sodium nitrate is 12g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a pickling solution at 25°C for 1.5 minutes to remove dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 120g/L, sulfuric acid concentration is 35g/L, formic acid concentration is 15g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a polishing solution at 55°C for 35 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid, sulfinic acid and phenylacetic acid. The percentage is 67%, the volume percentage of sulfinic acid is 21%, and the volume percentage of phenylacetic acid is 12%;
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 21°C for 35 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, aluminum sulfate and alkane.
  • the mixed aqueous solution of base phenol, the concentration of sulfuric acid is 15g/L, the concentration of oxalic acid is 8g/L, the concentration of aluminum sulfate is 18g/L, the concentration of alkylphenol is 2.5g/L, the direct current density of anodizing is 1.7A/dm2, the voltage 9V, the anodized cathode is lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 4.8 and a temperature of 82°C for sealing treatment for 4 minutes to close the micropores on the oxide film, and obtain the 7000 series aluminum after cleaning and drying Appearance of alloy electronic products.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 4.7%, Mg 1.5%, Mn 0.5%, Fe 0.13%, Si 0.07%, Ti 0.5%, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy exterior parts into a degreasing solution at 80°C for 8 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 80g /L, the concentration of sodium phosphate is 30g/L, and the concentration of sodium citrate is 15g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into an alkaline washing solution at 30°C for 2 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium silicate.
  • concentration of sodium hydroxide is 20g/L
  • concentration of sodium silicate is 15g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a pickling solution at 25°C for 2 minutes to remove the dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 130g/L, sulfuric acid concentration is 30g/L, formic acid concentration is 20g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a 60°C polishing solution for chemical polishing for 30 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid and sulfuric acid, and the volume percentage of phosphoric acid is 67%.
  • the volume percentage of sulfuric acid is 33%;
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 20°C for 40 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is sulfuric acid, oxalic acid, aluminum sulfate and alkane.
  • a mixed aqueous solution of base phenol the concentration of sulfuric acid is 140g/L, the concentration of oxalic acid is 9g/L, the concentration of aluminum sulfate is 20g/L, the concentration of alkylphenol is 2g/L, the direct current density of anodizing is 1.6A/dm2, and the voltage is 10V, the anodized cathode is lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 5.0 and a temperature of 80°C for sealing treatment for 5 minutes to seal the micropores on the oxide film, and obtain the 7000 series aluminum after washing and drying Appearance of alloy electronic products.
  • a 7000 series aluminum alloy electronic product appearance part oxidation coloring method the 7000 series aluminum alloy is composed of the following mass percentages: Zn 6.3%, Mg 2.1%, Cu 1.9%, Fe 0.15%, Si 0.07%, Ti 0.08%, the rest is Al and other unavoidable impurity elements.
  • the individual content of other impurity elements is ⁇ 0.05%, and the total amount is ⁇ 0.15%;
  • the oxidation coloring method includes the following steps in sequence:
  • the first step mechanically polish the surface of the aluminum alloy appearance parts to remove the machining knife marks, burrs, scratches, etc. on the surface to obtain a smooth surface;
  • Step 2 Put the aluminum alloy appearance parts into a 90°C degreasing solution for 7 minutes to remove oil stains on the surface.
  • the degreasing solution is a mixed aqueous solution of sodium carbonate, sodium phosphate and sodium citrate, with a sodium carbonate concentration of 60g /L, the concentration of sodium phosphate is 40g/L, and the concentration of sodium citrate is 10g/L;
  • the third step Put the cleaned aluminum alloy appearance parts into an alkaline washing solution at 25°C for 2 minutes to remove the natural oxide film on the surface.
  • the alkaline solution is a mixed aqueous solution of sodium hydroxide and sodium silicate.
  • concentration of sodium hydroxide is 25g/L
  • concentration of sodium silicate is 10g/L;
  • Step 4 Put the cleaned aluminum alloy appearance parts into a 30°C pickling solution for 1 minute to remove dirt on the surface.
  • the acid solution is a mixed aqueous solution of nitric acid, sulfuric acid and formic acid, and the concentration of nitric acid is 110g/L, sulfuric acid concentration is 40g/L, formic acid concentration is 10g/L;
  • Step 5 Put the cleaned aluminum alloy appearance parts into a 50°C polishing solution for chemical polishing for 40 seconds to obtain a smooth and bright surface.
  • the polishing solution is a mixture of phosphoric acid, sulfinic acid, and phenylacetic acid.
  • the volume percentage is 65%, the volume percentage of sulfinic acid is 22%, and the volume percentage of phenylacetic acid is 13%;
  • Step 6 Put the cleaned aluminum alloy appearance parts into an oxidizing solution at 22°C for 30 minutes to form an oxide film with micropores on the surface.
  • the oxidizing solution is an aqueous sulfuric acid solution with a sulfuric acid concentration of 150g/ L, the anodized direct current density is 1.8A/dm2, the voltage is 8V, and the anodized cathode is a lead plate;
  • Step 7 Put the cleaned aluminum alloy appearance parts into the dyeing solution for organic dyeing and coloring, so that the dye is deposited into the holes of the oxide film;
  • Step 8 Put the cleaned aluminum alloy appearance parts into boiling water with a pH of 4.5 and a temperature of 85°C for sealing treatment for 3 minutes to close the micropores on the oxide film, and obtain the 7000 series aluminum after cleaning and drying. Appearance of alloy electronic products.
  • the oxide film of the appearance parts of the 7000 series aluminum alloy electronic product of the example and the comparative example was observed on the JCX-1250 Shimadzu scanning electron microscope, and the cross-sectional thickness of the oxide film was measured.
  • the test results are shown in Table 1.
  • GB/T 20503-2006 "Aluminum and Aluminum Alloy Anodized Anodic Oxide Film Specular Reflectance and Specular Gloss Measurement”
  • the 7000 series aluminum alloy electronic product appearance part oxide film was measured and tested at 60° specular gloss GS value.
  • the results are shown in Table 1.
  • According to the national standard GB/T12967.6-2008 "Aluminum and aluminum alloy anodic oxide film detection method Part 6: Visual observation method to inspect the color difference and appearance quality of colored anodic oxide film”
  • the test results are shown in Table 1.
  • the oxide film of the appearance part of the 7000 series aluminum alloy electronic product of the present invention is dense, the oxide film thickness is greater than 25 microns, the gloss GS value is greater than 718, and the color is pure and colorful after coloring.
  • Comparative Example 1 is due to the common sodium hydroxide and sodium nitrate aqueous solution
  • Comparative Example 2 is due to the ordinary phosphoric acid and sulfuric acid mixture
  • Comparative Example 3 is due to the oxidizing solution used.
  • the present invention can significantly improve the compactness, thickness, gloss and coloring of the oxide film of the appearance parts of 7000 series aluminum alloy electronic products by optimizing the composition ratio of the alkaline washing liquid, polishing liquid and oxidation liquid. The effect is pure and colorful after coloring.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

L'invention concerne un procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000, celui-ci appartenant au domaine technique des traitements de surface en alliage d'aluminium. Le procédé comprend les étapes suivantes dans l'ordre : prétraitement de surface mécanique ; dégraissage pour l'élimination de l'huile ; lavage alcalin pour l'élimination du film ; lavage à l'acide pour l'élimination des cendres ; polissage chimique ; utilisation d'une partie externe en alliage d'aluminium en tant qu'anode dans un liquide d'oxydation, et soumission de celle-ci à une oxydation anodique à l'aide d'une plaque de plomb ou d'une plaque de graphite en tant que cathode, de telle sorte que la surface de la partie extérieure en alliage d'aluminium est formée en un film d'oxydation avec des micropores ; après nettoyage de celle-ci, mise en place de la partie extérieure en alliage d'aluminium dans une solution de colorant en vue de la coloration, de telle sorte que le colorant entre dans les micropores du film d'oxydation ; et enfin, fermeture des micropores, de telle sorte que le colorant est fixé dans les micropores du film d'oxydation. La partie extérieure de produit électronique en alliage d'aluminium de série 7000 obtenue à partir du procédé a un film d'oxydation qui est dense, a une force d'adhérence élevée, n'est pas facile à protéger, et a une bonne résistance à l'usure et une bonne résistance à la corrosion. Le film d'oxydation est transparent et claire, a une texture lisse, peut obtenir diverses couleurs colorées pures après coloration, et a un excellent effet de décoration de surface.
PCT/CN2019/092593 2019-06-24 2019-06-24 Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000 WO2020257992A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/092593 WO2020257992A1 (fr) 2019-06-24 2019-06-24 Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/092593 WO2020257992A1 (fr) 2019-06-24 2019-06-24 Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000

Publications (1)

Publication Number Publication Date
WO2020257992A1 true WO2020257992A1 (fr) 2020-12-30

Family

ID=74061151

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/092593 WO2020257992A1 (fr) 2019-06-24 2019-06-24 Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000

Country Status (1)

Country Link
WO (1) WO2020257992A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113246648A (zh) * 2021-03-02 2021-08-13 宝鸡市福立特工贸有限责任公司 一种钛金属板画及其制造工艺

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01123095A (ja) * 1987-11-05 1989-05-16 Nec Corp アルミ合金とゴム接着品の陽極酸化処理方法
CN101619480A (zh) * 2008-06-30 2010-01-06 比亚迪股份有限公司 一种复合材料及其制备方法
CN101831681A (zh) * 2010-06-04 2010-09-15 天津大学 一种铝合金着有色复合膜的制备方法
JP2013020235A (ja) * 2011-05-20 2013-01-31 Nippon Light Metal Co Ltd ペリクル用支持枠の製造方法及びペリクル用支持枠並びにペリクル
CN103834836A (zh) * 2012-11-23 2014-06-04 深圳市欣茂鑫精密五金制品有限公司 一种压铸锻造铝合金及其生产方法
CN106222721A (zh) * 2016-08-26 2016-12-14 北京星航机电装备有限公司 一种高发射率阳极氧化膜层的制备方法
CN109295354A (zh) * 2018-12-06 2019-02-01 广东省材料与加工研究所 一种高强度铝合金的阳极氧化液及氧化方法和应用
CN109609992A (zh) * 2018-12-31 2019-04-12 东莞市久丰金属制品有限公司 一种铝合金手机外壳阳极氧化处理方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01123095A (ja) * 1987-11-05 1989-05-16 Nec Corp アルミ合金とゴム接着品の陽極酸化処理方法
CN101619480A (zh) * 2008-06-30 2010-01-06 比亚迪股份有限公司 一种复合材料及其制备方法
CN101831681A (zh) * 2010-06-04 2010-09-15 天津大学 一种铝合金着有色复合膜的制备方法
JP2013020235A (ja) * 2011-05-20 2013-01-31 Nippon Light Metal Co Ltd ペリクル用支持枠の製造方法及びペリクル用支持枠並びにペリクル
CN103834836A (zh) * 2012-11-23 2014-06-04 深圳市欣茂鑫精密五金制品有限公司 一种压铸锻造铝合金及其生产方法
CN106222721A (zh) * 2016-08-26 2016-12-14 北京星航机电装备有限公司 一种高发射率阳极氧化膜层的制备方法
CN109295354A (zh) * 2018-12-06 2019-02-01 广东省材料与加工研究所 一种高强度铝合金的阳极氧化液及氧化方法和应用
CN109609992A (zh) * 2018-12-31 2019-04-12 东莞市久丰金属制品有限公司 一种铝合金手机外壳阳极氧化处理方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113246648A (zh) * 2021-03-02 2021-08-13 宝鸡市福立特工贸有限责任公司 一种钛金属板画及其制造工艺

Similar Documents

Publication Publication Date Title
CN101845654B (zh) 一种铝带材阳极氧化工艺
CN109295354B (zh) 一种高强度铝合金的阳极氧化液及氧化方法和应用
CN110306227A (zh) 一种3c产品铝合金外观件的表面处理方法与应用
US20080149492A1 (en) Surface dyeing process for metal articles
CN112458512B (zh) 一种镁合金微弧氧化黑色超疏水膜层的制备方法
CN103628114B (zh) 镁铝合金的表面处理方法
CN106637338A (zh) 一种汽车铝合金行李架的阳极氧化工艺
CN110219031A (zh) 阳极氧化电解液及方法、具有阳极氧化膜的铝或铝合金
KR101200526B1 (ko) 마그네슘계 금속의 금속 질감을 구현할 수 있는 마그네슘 표면처리 방법
CN102260896A (zh) 一种含镁高硅变形铝合金表面电解着色膜的制备方法
CN1034522C (zh) 等离子体增强电化学表面陶瓷化方法及其制得的产品
CN103820832A (zh) 一种在铝合金表面生成超耐磨涂层的两步微弧氧化法
CN110408974A (zh) 一种高硅压铸铝合金阳极氧化亮黑制造工艺
CN103590085B (zh) 一种键合丝生产用铝线轴的表面处理方法
WO2020257992A1 (fr) Procédé d'oxydation et de coloration d'une partie externe d'un produit électronique en alliage d'aluminium de série 7000
CN107858733A (zh) 一种铝型材氧化着色方法
CN105040067B (zh) 环保型无镍无氟中温封闭剂及封闭方法
CN112981490B (zh) 微弧氧化液、微弧氧化方法及铝合金材料
CN106283152A (zh) 一种铝合金表面具有自封孔特性黑色陶瓷层及其制备方法
CN110129854A (zh) 一种氧化膜的制备方法和终端设备
KR20100085704A (ko) 고강도 알루미늄 소재의 표면 처리 방법
CN109161951A (zh) 一种镁合金微弧氧化电解液及其应用
CN113046811B (zh) 一种微弧氧化电解液及其应用方法、工件
CN105951153B (zh) 一种用磺基水杨酸制备近共晶铝硅合金阳极氧化膜的方法
CN102864478B (zh) 一种铝制品表面处理工艺

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19934589

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19934589

Country of ref document: EP

Kind code of ref document: A1