EP3399851A1 - Boîtier en alliage d'aluminium et son procédé de préparation - Google Patents

Boîtier en alliage d'aluminium et son procédé de préparation Download PDF

Info

Publication number
EP3399851A1
EP3399851A1 EP16881081.0A EP16881081A EP3399851A1 EP 3399851 A1 EP3399851 A1 EP 3399851A1 EP 16881081 A EP16881081 A EP 16881081A EP 3399851 A1 EP3399851 A1 EP 3399851A1
Authority
EP
European Patent Office
Prior art keywords
aluminum alloy
alloy housing
housing substrate
temperature
electrophoretic
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP16881081.0A
Other languages
German (de)
English (en)
Other versions
EP3399851A4 (fr
Inventor
Xiong XIONG
Chongchong LIAO
Liang Chen
Zhiwen ZHONG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
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 BYD Co Ltd filed Critical BYD Co Ltd
Publication of EP3399851A1 publication Critical patent/EP3399851A1/fr
Publication of EP3399851A4 publication Critical patent/EP3399851A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/20—Pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/222—Removing surface-material, e.g. by engraving, by etching using machine-driven mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • 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
    • C25D11/026—Anodisation with spark discharge
    • 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
    • C25D11/12—Anodising more than once, e.g. in different baths
    • 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
    • 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
    • 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
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/04—Electrophoretic coating characterised by the process with organic material
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes
    • 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
    • C25D11/14—Producing integrally coloured layers

Definitions

  • the present invention relates to the field of electronic product technologies, and in particular, to an aluminum alloy housing and a preparation method for same.
  • a metal casing obtained by using the foregoing surface treatment technology lacks diversity in appearance decoration and textures. It is necessary to develop an aluminum alloy housing that has desirable appearance decoration and a solid texture, and a preparation method for same.
  • the present invention is directed to provide an aluminum alloy housing and a preparation method for same.
  • the aluminum alloy housing has a bumpy solid texture and has a glossy convex side and concave side.
  • an aluminum alloy housing According to embodiments of the present invention, an external surface of the aluminum alloy housing has a convex portion and a concave portion, the convex portion has a convex oxide film and a convex electrophoretic decorative layer in turn, the concave portion has a concave oxide film or a concave electrophoretic decorative layer, surface of the convex electrophoretic decorative layer has a glossiness of 90-105, and surface of the concave oxide film has a glossiness of 5-25 or surface of the concave electrophoretic decorative layer has a glossiness of 0.5-5.
  • a height difference between the convex portion and the concave portion is 0.05-0.2 mm.
  • the convex oxide film and the concave oxide film have different colors.
  • the present invention further provides a preparation method for an aluminum alloy housing, which includes steps of:
  • the first anodic oxidation and/or the second anodic oxidation comprises performing pretreatment on the surface of the aluminum alloy housing substrate and then forming an anode film by means of anodic oxidation.
  • the pretreatment comprises: performing alkali etching for 3-20s at a temperature of 50-70°C by using 50-60 g/L of sodium hydroxide, neutralizing for 10-20s a temperature of 15-25°C by using 200-300 ml/L of nitric acid, and performing chemical polishing for 5-20s at a temperature of 90-95°C by using a chemical polishing solution containing 650-750 ml/L of phosphoric acid and 350-250 ml/L of sulfuric acid.
  • the anodic oxidation comprises oxidizing the surface of the aluminum alloy housing substrate for 15-50 min under an anode voltage of 13-17 V and at a temperature of 10-21°C by using 190-200 g/L of sulfuric acid.
  • the first electrophoretic treatment and/or the second electrophoretic treatment comprises electrophoresing for 1-3min under a voltage of 140-200 V and at a temperature of 28-32°C by using an electrophoresing solution having a pH of 7-9.
  • the hard anodic oxidation comprises oxidizing for 25-50min under a temperature of 5-12°C by using a hard anodic oxidation solution.
  • the hard anodic oxidation solution includes 170-270g/L of sulfuric acid and 8-20g/L of oxalic acid.
  • the micro-arc oxidation includes oxidizing for 40-100min under a temperature of 20-30°C by using a micro-arc oxidation solution.
  • the micro-arc oxidation solution includes 0.02-0.05mol/L of sodium silicate and 0.03-0.07mol/L of sodium hydroxide.
  • first anodic oxidation is firstly performed on the surface of the aluminum alloy housing substrate, then a convex electrophoretic decorative layer is formed via first electrophoretic treatment, and then mechanical polishing is performed on the surface of the aluminum alloy housing substrate on which the first electrophoretic treatment has been performed, then a texture pattern having a convex-concave effect on the surface of the aluminum alloy housing substrate is formed via laser carving, next, second electrophoretic treatment or second anodic oxidation or hard anodic oxidation or micro-arc oxidation is performed on portion of the texture pattern on the surface of the aluminum alloy housing substrate, thereby producing an aluminum alloy housing having a bumpy solid texture and having a glossy convex side and non-glossy concave side.
  • An aluminum alloy housing is provided according to an embodiment of the present invention.
  • An external surface of the aluminum alloy housing has a convex portion and a concave portion, the convex portion has a convex oxide film and a convex electrophoretic decorative layer in turn, the concave portion has a concave oxide film or a concave electrophoretic decorative layer, surface of the convex electrophoretic decorative layer has a glossiness of 90-105, and surface of the concave oxide film has a glossiness of 5-25 or surface of the concave electrophoretic decorative layer has a glossiness of 0.5-5.
  • the surfaces of the convex oxide film are glossy.
  • the glossiness means how close the surface of the oxide film is to a mirror surface, and can be measured by using a method commonly known in the field, for example, measured by using a gloss meter.
  • a method for forming a convex portion and a concave portion on the external surface of the aluminum alloy housing and a method for forming a convex oxide film on the convex portion and forming a concave oxide film on the concave portion will be described in the following preparation method for the aluminum alloy housing.
  • the convex oxide film and the concave oxide film are of different colors.
  • the aluminum alloy housing has film layers of different colors.
  • the preparation method for an aluminum alloy housing in order to obtain a glossy effect of the aluminum alloy housing, mechanical polishing is performed on the surface of the aluminum alloy housing substrate on which the first electrophoretic treatment has been performed.
  • the anodic oxidation film layer on the surface of the aluminum alloy housing substrate is polished by using a mechanical polishing machine, to reduce the overall thickness of the anodic oxidation film layer by approximately 2 ⁇ m, so that the surface of the anodic oxidation film is glossy and can reflect light, and a glossy surface having a high glossiness is formed, and then laser carving is performed so as to obtain a convex-concave difference on surface of the aluminum alloy housing substrate, thus to obtain a bumpy solid texture.
  • the aluminum alloy housing substrate used in the present invention is not particularly limited.
  • Various aluminum alloy housing bodies can be used, for example, a product of industrial standard 1000-7000 series, a die-casting aluminum alloy, and a pressure-casting aluminum alloy.
  • the aluminum alloy housing substrate in the present invention is an aluminum alloy housing body of various shapes and structures that are commonly used by a person skilled in the art, and is not particularly limited in the present invention.
  • the various shapes and structures of the aluminum alloy housing substrate can be accomplished by mechanical processing.
  • the aluminum alloy housing can be used as a housing of a mobile phone, a tablet computer, an e-reader, or the like.
  • blasting and drawing treatment can be performed on the surface of the aluminum alloy housing substrate in advance.
  • the blasting can be performed by using a method commonly known in the field.
  • blasting treatment is performed on the surface of the aluminum alloy housing substrate by using a ceramic sand of 80-400 meshes under a pressure of 0.1-0.24 MPa, so that the surface of the aluminum alloy housing substrate feels sandy.
  • the drawing treatment can be performed by using a method commonly known in the field.
  • the surface of the aluminum alloy housing substrate can be drawn by a drawing machine with No. 400 to No. 1200 drawing wheels to achieve the required brushed texture from coarse to fine.
  • the first anodic oxidation and/or the second anodic oxidation may include performing pretreatment on the surface of the aluminum alloy housing substrate and then forming an anode film by means of anodic oxidation.
  • the thickness of the formed anode film is usually 6-10 ⁇ m.
  • the pretreatment is performed to make the surface of the aluminum alloy housing substrate clean and ensure that a uniform anode film is formed on the surface of the aluminum alloy housing substrate by means of anodic oxidation.
  • the pretreatment may include: performing alkali etching for 3-20s at a temperature of 50-70°C by using 50-60 g/L of sodium hydroxide, neutralizing for 10-20s a temperature of 15-25°C by using 200-300 ml/L of nitric acid, and performing chemical polishing for 5-20s at a temperature of 90-95°C by using a chemical polishing solution containing 650-750 ml/L of phosphoric acid and 350-250 ml/L of sulfuric acid.
  • the method of the anodic oxidation can be an anodic oxidation method commonly known in the field.
  • the anodic oxidation may include oxidizing the surface of the aluminum alloy housing substrate for 15-50 min under an anode voltage of 13-17 V and at a temperature of 10-21°C by using 190-200 g/L of sulfuric acid.
  • an electrophoretic decorative layer is formed on surface of the aluminum alloy housing substrate via the first electrophoretic treatment and/or the second electrophoretic treatment, which may protect the aluminum alloy housing effectively and provide a decorative effect.
  • the first electrophoretic treatment and/or the second electrophoretic treatment may include electrophoresing for 1-3min under a voltage of 140-200 V and at a temperature of 28-32°C by using an electrophoresing solution having a pH of 7-9.
  • the electrophoresing solution could be any electrophoresing solution commonly used in the art, as long as the electrophoretic decorative layer could be formed on surface of the aluminum alloy housing substrate.
  • the electrophoresing solution may contain a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition;
  • the flat lacquer (WNO-1) includes 50wt% of acrylic resin, 10wt% of 2-butoxy ethanol, and 40wt% of other composition.
  • a texture pattern having a convex-concave effect on the surface of the aluminum alloy housing substrate could be obtained by laser carving a surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed.
  • a method of the laser carving could be any method of laser carving commonly used in the art, for example, the laser carving may carried out through a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1m.
  • the hard anodic oxidation may include oxidizing for 25-50min under a temperature of 5-12°C by using a hard anodic oxidation solution. More preferably, the hard anodic oxidation solution may include 170-270g/L of sulfuric acid and 8-20g/L of oxalic acid. Electrical parameters of the hard anodic oxidation may include: forward square wave pulse, duty ratio of 60%-80%, frequency of 500-1000Hz, electric current density of 3-7A/dm 2 .
  • the micro-arc oxidation may include oxidizing for 40-100min under a temperature of 20-30°C by using a micro-arc oxidation solution. More preferably, the micro-arc oxidation solution may include 0.02-0.05mol/L of sodium silicate and 0.03-0.07mol/L of sodium hydroxide. A oxidation forward voltage of the micro-arc oxidation may be 400-600V.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 15°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 90°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.05mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 15°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate, thereby obtaining the aluminum alloy housing of the present invention.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, an electrophoresing time of 2 min, a pH of 7.8, using an electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan).
  • the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition;
  • the flat lacquer (WNO-1) includes 50wt% of acrylic resin, 10wt% of 2-butoxy ethanol, and 40wt% of other composition.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 20s in a sodium hydroxide aqueous solution with a concentration of 60g/L, and was cleaned twice with deionized water. Then, at a temperature of 20°C, the aluminum alloy housing substrate was subjected to neutralization for 20s in nitric acid with a concentration of 300 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 93°C, the aluminum alloy housing substrate was subjected to polishing for 20s in a chemical polishing solution containing 700 ml/L of phosphoric acid and 300 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 20s in nitric acid with a concentration of 300 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 195 g/L as a bath solution, an anode voltage being 17 V, a temperature being 10°C, and an oxidation time being 50 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 32°C, a voltage of 200V, a electrophoresing time of 1 min, a pH of 7, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the flat
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.2mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 20s in a sodium hydroxide aqueous solution with a concentration of 60g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 300 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate, thereby obtaining the aluminum alloy housing of the present invention.
  • Conditions of the electrophoretic treatment include: a temperature of 32°C, a voltage of 200V, an electrophoresing time of 1 min, a pH of, using an electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan).
  • the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition;
  • the flat lacquer (WNO-1) includes 50wt% of acrylic resin, 10wt% of 2-butoxy ethanol, and 40wt% of other composition.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to anodic oxidation to form an anode film on a surface of the cleaned aluminum alloy housing substrate, thereby obtaining the aluminum alloy housing of the present invention.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 5 min.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to hard anodic oxidation by using a hard anodic oxidation solution including 200g/L of sulfuric acid and 15g/L of oxalic acid for 25 min, under a temperature of 10°C.
  • An electrical parameters of the hard anodic oxidation include: forward square wave pulse, duty ratio of 70%, frequency of 800Hz, electric current density of 5A/dm 2 ; thereby obtaining the aluminum alloy housing of the present invention.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to hard anodic oxidation by using a hard anodic oxidation solution including 170g/L of sulfuric acid and 20g/L of oxalic acid for 30 min, under a temperature of 5°C.
  • An electrical parameters of the hard anodic oxidation include: forward square wave pulse, duty ratio of 80%, frequency of 500Hz, electric current density of 3A/dm 2 ; thereby obtaining the aluminum alloy housing of the present invention.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to hard anodic oxidation by using a hard anodic oxidation solution including 270g/L of sulfuric acid and 20g/L of oxalic acid for 25 min, under a temperature of 12°C.
  • An electrical parameters of the hard anodic oxidation include: forward square wave pulse, duty ratio of 60%, frequency of 1000Hz, electric current density of 7A/dm 2 ; thereby obtaining the aluminum alloy housing of the present invention.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to micro-arc oxidation by using a micro-arc oxidation solution including 0.03mol/L of sodium silicate and 0.05mol/L of sodium hydroxide for 40 min, under a temperature of 25°C, and an oxidation forward voltage of 500V; thereby obtaining the aluminum alloy housing of the present invention.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to micro-arc oxidation by using a micro-arc oxidation solution including 0.02mol/L of sodium silicate and 0.07mol/L of sodium hydroxide for 100 min, under a temperature of 30°C, and an oxidation forward voltage of 400V; thereby obtaining the aluminum alloy housing of the present invention.
  • This embodiment is used to describe the aluminum alloy housing of the present invention and a preparation method for same.
  • a pressure-casting aluminum alloy rear housing substrate (purchased from BYD Co., Ltd.) for use in a P8-model mobile phone is used as an aluminum alloy housing substrate of the this embodiment.
  • the aluminum alloy housing substrate was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water. Then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water. Next, at a temperature of 95°C, the aluminum alloy housing substrate was subjected to polishing for 10s in a chemical polishing solution containing 650 ml/L of phosphoric acid and 350 ml/L of sulfuric acid, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the aluminum alloy housing substrate was dried for 20 min at a temperature of 80°C in a drying oven, to obtain the cleaned and dried aluminum alloy housing substrate.
  • An anode film was formed on a surface of the cleaned and dried aluminum alloy housing substrate by means of anodic oxidation.
  • Conditions of the anodic oxidation include: using sulfuric acid with a concentration of 190 g/L as a bath solution, an anode voltage being 15 V, a temperature being 19°C, and an oxidation time being 35 min.
  • the aluminum alloy housing substrate on which the anodic oxidation has been performed was subjected to electrophoretic treatment to form an electrophoretic decorative layer on surface of the aluminum alloy housing substrate.
  • Conditions of the electrophoretic treatment include: a temperature of 30°C, a voltage of 160V, a electrophoresing time of 2 min, a pH of 7.8, using a electrophoresing solution containing a flat lacquer (WNO-1) of Shimizu Corporation (Japan) and a varnish (NNO-4) of Shimizu Corporation (Japan); the weight ratio of the flat lacquer to the varnish is 7:3, and a content of a solid composition in the electrophoresing solution is 13wt%;
  • the varnish (NNO-4) includes 50wt% of acrylic resin, 6wt% of 2-butoxy ethanol, 20wt% of ethylene glycol monoisobutyl ether, 18wt% of diethyl diol butyraldehyde, and 6wt% of other composition; the
  • the electrophoretic decorative layer on the surface of the aluminum alloy housing substrate was polished by using a mechanical polishing machine, to reduce the overall thickness of the electrophoretic decorative layer by approximately 2 ⁇ m, so that the surface of the electrophoretic decorative layer is glossy and can reflect light.
  • the surface of the aluminum alloy housing substrate on which the mechanical polishing has been performed was subjected to laser carving via a laser carving machine, so as to expose the aluminum alloy substrate and to obtain a texture pattern having a depth of 0.1mm and a convex-concave effect on the surface of the aluminum alloy housing substrate.
  • the aluminum alloy housing substrate after being laser carved was subjected to alkali etching for 10s in a sodium hydroxide aqueous solution with a concentration of 55 g/L, and was cleaned twice with deionized water, and then, at a temperature of 25°C, the aluminum alloy housing substrate was subjected to neutralization for 10s in nitric acid with a concentration of 250 ml/L, and was cleaned twice with deionized water.
  • the cleaned aluminum alloy housing substrate was subjected to micro-arc oxidation by using a micro-arc oxidation solution including 0.05mol/L of sodium silicate and 0.03mol/L of sodium hydroxide for 60 min, under a temperature of 20°C, and an oxidation forward voltage of 600V; thereby obtaining the aluminum alloy housing of the present invention.
  • a micro-arc oxidation solution including 0.05mol/L of sodium silicate and 0.03mol/L of sodium hydroxide for 60 min, under a temperature of 20°C, and an oxidation forward voltage of 600V; thereby obtaining the aluminum alloy housing of the present invention.
  • a gloss meter (German BKY micro gloss meter A-4460) was used to test the glossiness of the surfaces of the aluminum alloy housings obtained in Embodiments 1-9. The results are as shown in Table 1.
  • a UNI pen having 2H hardness was used to scratch at three different places of a sample with a force of 800 g applied at an angle of 45 degrees and a stroke of 10 mm. It is observed whether an evident scratch appears on the sample. If no, it indicates that the sample is qualified.
  • the sample was put into a precise high temperature test chamber (HOLINK HRHL45), was heated for 240 hours at a temperature of 85°C, and stayed for 2 hours at room temperature. It is observed whether fall-off, deformation, crack, and color change occurs in the appearance of the sample. If no, it indicates that the sample is qualified.
  • HOLINK HRHL45 high temperature test chamber
  • the sample was put into a constant temperature and humidity test chamber (Taiwan KSON, THS-2001), stayed for 240 hours at a temperature of -40°C, and then stayed for 2 hours at room temperature. It is observed whether fall-off, deformation, crack, and color change occurs in the appearance of the sample. If no, it indicates that the sample is qualified.
  • the sample was put into a constant temperature and humidity test chamber (Taiwan KSON, HTS-400) with a humidity of 90% and a temperature of 60°C, stayed for 96 hours, and then stayed for 2 hours at room temperature. It is observed whether fall-off, deformation, crack, and color change occurs in the appearance of the sample. If no, it indicates that the sample is qualified.
  • a constant temperature and humidity test chamber Tiwan KSON, HTS-400
  • the sample was put into a thermal shock test chamber (HOLINK HTS-400), and first stayed for 1 hour in an environment with a temperature of -40°C; then, the temperature was switched to 85°C (a switching time was 15s), and the sample stayed for 1 hour at the temperature of 85°C. This process is repeated 12 times (24 hours). It is observed whether fall-off, deformation, crack, and color change occurs in the appearance of the sample. If no, it indicates that the sample is qualified.
  • HOLINK HTS-400 thermal shock test chamber
  • the sample was put into a test chamber (HOLINK H-SST-90 salt spray tester) with a temperature of 30°C and a humidity of 85% or higher.
  • the surface of the aluminum alloy housing of the present invention is not abraded easily, and the surface layer does not fall off easily, thereby improving the durability of the aluminum alloy housing.
  • the aluminum alloy housing achieves a beautiful appearance effect, and has a clear bumpy solid texture. Therefore, the aluminum alloy housing provided by the present invention is beautiful and durable.
  • the surfaces of the aluminum alloy housings obtained in Embodiments 1-9 are also glossy.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • ing And Chemical Polishing (AREA)
EP16881081.0A 2015-12-30 2016-12-22 Boîtier en alliage d'aluminium et son procédé de préparation Withdrawn EP3399851A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201511019773.5A CN106926627A (zh) 2015-12-30 2015-12-30 一种铝合金壳体及其制备方法
PCT/CN2016/111568 WO2017114292A1 (fr) 2015-12-30 2016-12-22 Boîtier en alliage d'aluminium et son procédé de préparation

Publications (2)

Publication Number Publication Date
EP3399851A1 true EP3399851A1 (fr) 2018-11-07
EP3399851A4 EP3399851A4 (fr) 2018-11-21

Family

ID=59225599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16881081.0A Withdrawn EP3399851A4 (fr) 2015-12-30 2016-12-22 Boîtier en alliage d'aluminium et son procédé de préparation

Country Status (4)

Country Link
US (1) US20180305838A1 (fr)
EP (1) EP3399851A4 (fr)
CN (1) CN106926627A (fr)
WO (1) WO2017114292A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4187000A1 (fr) * 2021-11-25 2023-05-31 BAE SYSTEMS plc Traitement de composant

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107187262A (zh) * 2017-08-01 2017-09-22 苏州市拓然柯工贸有限公司 一种铝合金窗花的雕花工艺
CN107699932A (zh) * 2017-09-30 2018-02-16 徐州轩辕铝业有限公司 一种铝制品的表面处理方法
CN107683047B (zh) * 2017-10-30 2020-02-14 Oppo广东移动通信有限公司 壳体制作方法、壳体基板、壳体及电子设备
CN108060448A (zh) * 2017-11-23 2018-05-22 广东欧珀移动通信有限公司 移动终端壳体及其制备方法和移动终端
CN108193250A (zh) * 2018-02-24 2018-06-22 沈阳富创精密设备有限公司 一种硫酸+混酸混合阳极氧化工艺
CN108747199B (zh) * 2018-03-19 2020-07-24 Oppo广东移动通信有限公司 铝合金板材及其制备方法、壳体和移动终端
TWI751566B (zh) 2020-05-26 2022-01-01 宏碁股份有限公司 機殼的製作方法
CN113829003B (zh) * 2020-06-23 2022-12-27 宏碁股份有限公司 机壳的制作方法
CN111800970B (zh) * 2020-07-22 2022-02-18 Oppo广东移动通信有限公司 电子设备壳体及其制备方法和电子设备
CN112410845B (zh) * 2020-11-27 2022-05-13 广东和胜工业铝材股份有限公司 一种铝合金二次阳极氧化处理的方法
CN113061953A (zh) * 2021-03-19 2021-07-02 广东智目科技有限公司 手机摄像头装饰件表面处理方法
CN113106517A (zh) * 2021-04-09 2021-07-13 维沃移动通信(重庆)有限公司 装饰圈的制备方法、装饰圈和电子设备
CN113151877B (zh) * 2021-04-25 2022-03-22 攀钢集团研究院有限公司 耐磨钛合金微弧氧化涂层的制备方法
CN114434100B (zh) * 2022-01-18 2023-04-14 深圳市栢迪科技有限公司 铝合金坯件的处理方法、铝合金坯件及应用

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1106795A (fr) * 1975-06-27 1981-08-11 Toshihiko Sato Coloration a motifs d'un article d'aluminium anodise avec differentes nuances
JP4768478B2 (ja) * 2006-03-17 2011-09-07 富士フイルム株式会社 微細構造体の製造方法および微細構造体
CN101293460B (zh) * 2007-04-24 2011-08-17 比亚迪股份有限公司 一种轻金属材料的表面装饰方法
CN101730415A (zh) * 2008-10-30 2010-06-09 深圳富泰宏精密工业有限公司 壳体及其制作方法
CN102724840B (zh) * 2011-03-29 2015-03-04 富准精密工业(深圳)有限公司 壳体及其制造方法
CN102400198A (zh) * 2011-12-08 2012-04-04 广东步步高电子工业有限公司 一种在金属表面双色电泳涂装方法
US9683305B2 (en) * 2011-12-20 2017-06-20 Apple Inc. Metal surface and process for treating a metal surface
CN103320830B (zh) * 2012-03-20 2016-08-17 比亚迪股份有限公司 一种金属复合材料及其制备方法
CN103352244B (zh) * 2013-06-19 2016-08-10 广东耀银山铝业有限公司 铝合金高光阳极氧化电泳工艺
CN104735941B (zh) * 2013-12-20 2019-01-11 比亚迪股份有限公司 一种通讯设备金属外壳及其制备方法
CN105765112A (zh) * 2014-02-14 2016-07-13 惠普发展公司，有限责任合伙企业 具有绝缘层的衬底
CN105018992A (zh) * 2015-07-17 2015-11-04 广东欧珀移动通信有限公司 一种logo的制作方法及采用该logo的电子设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4187000A1 (fr) * 2021-11-25 2023-05-31 BAE SYSTEMS plc Traitement de composant

Also Published As

Publication number Publication date
US20180305838A1 (en) 2018-10-25
CN106926627A (zh) 2017-07-07
EP3399851A4 (fr) 2018-11-21
WO2017114292A1 (fr) 2017-07-06

Similar Documents

Publication Publication Date Title
EP3399851A1 (fr) Boîtier en alliage d'aluminium et son procédé de préparation
EP3399073B1 (fr) Boîtier en alliage d'aluminium et son procédé de fabrication
EP3399852A1 (fr) Logement en alliage d'aluminium et son procédé de préparation
US20100051467A1 (en) Process for surface treating aluminum and aluminum alloy articles
EP3675467A1 (fr) Combinaison verre-métal 3d , son procédé de fabrication, et produit électronique
ES2613715T3 (es) Procedimiento y granalla para la fabricación de una superficie satinada sobre un sustrato de aluminio
WO2012128046A1 (fr) Élément métallique et son procédé de fabrication
TW201923511A (zh) 一種電子裝置的殼體及其製備方法和電子裝置
JP6498771B2 (ja) 通信装置金属ハウジング及びその製造方法
US8309183B2 (en) Method of making magnesium alloy housing
TW201318520A (zh) 電子裝置外殼及其製作方法
KR101047366B1 (ko) 금속 소재의 이중 표면처리 방법
CA2823304A1 (fr) Alliage de magnesium ayant texture de surface dense et procede de traitement de surface correspondant
CN105530789A (zh) 一种通讯设备金属外壳及其制备方法
KR20180118721A (ko) 고광택 딥 블랙 마감을 위한 양극산화 및 연마 표면 처리
CN112877742A (zh) 一种铝合金压铸件的复合表面处理方法
CN108789748A (zh) 一种木皮拼花烤漆门的制作工艺
CN102896825A (zh) 镀膜件及其制造方法
KR20190087502A (ko) 케이싱, 이의 제조방법 및 전자제품
TW201011127A (en) Method of anodizing aluminum or aluminum alloy
KR101543924B1 (ko) 발색 처리된 마그네슘 및 이를 위한 마그네슘 발색 처리방법
WO2018040696A1 (fr) Procédé de décoration de surface de produit en alliage de magnésium revêtu de caoutchouc et produit moulé correspondant
KR101853227B1 (ko) 마그네슘합금 재질의 태블릿pc용 케이스의 표면처리방법
KR101365663B1 (ko) 금속의 양극산화 표면 처리방법
JP2006117976A (ja) 御影石調模様を有するアルミニウム合金製内外装材及びその製造方法

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180626

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20181024

RIC1 Information provided on ipc code assigned before grant

Ipc: H05K 5/04 20060101AFI20181018BHEP

Ipc: C25D 13/04 20060101ALI20181018BHEP

Ipc: C25D 11/12 20060101ALI20181018BHEP

Ipc: C25D 11/18 20060101ALI20181018BHEP

Ipc: C25D 13/22 20060101ALI20181018BHEP

Ipc: C25D 13/20 20060101ALI20181018BHEP

Ipc: C25D 11/02 20060101ALI20181018BHEP

Ipc: C25D 11/22 20060101ALI20181018BHEP

Ipc: C25D 11/20 20060101ALI20181018BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210226

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20210618