US20180105947A1 - Method for preparing anti-bacterial oxide film on the surface of aluminum materials - Google Patents

Method for preparing anti-bacterial oxide film on the surface of aluminum materials Download PDF

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Publication number
US20180105947A1
US20180105947A1 US15/348,477 US201615348477A US2018105947A1 US 20180105947 A1 US20180105947 A1 US 20180105947A1 US 201615348477 A US201615348477 A US 201615348477A US 2018105947 A1 US2018105947 A1 US 2018105947A1
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US
United States
Prior art keywords
workpiece
aluminum
oxide film
aluminum materials
preparing
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.)
Abandoned
Application number
US15/348,477
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English (en)
Inventor
Fook Chi Mak
Sal Chi Mak
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Individual
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Individual
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 Individual filed Critical Individual
Publication of US20180105947A1 publication Critical patent/US20180105947A1/en
Abandoned legal-status Critical Current

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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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C23F3/03—Light metals with acidic solutions
    • 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
    • C25D11/16—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
    • C25D11/24—Chemical after-treatment
    • C25D11/243—Chemical after-treatment using organic dyestuffs
    • 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
    • C25D11/246—Chemical after-treatment for sealing layers

Definitions

  • the present invention relates to the technical field of anodic oxidation of aluminum materials, and more especially, to a method for preparing an anti-bacterial oxide film on the surface of aluminum materials.
  • Aluminum materials such as aluminum and aluminum alloy have gradually become mainstream materials of electronic products and home decoration by virtue of their cost-saving and lightweight characteristics.
  • the surfaces of these aluminum products are usually processed via anodic oxidation during which these products can be dyed for enhancement of their ornamental value.
  • aluminum products frequently touched by people in life may become carriers of bacterial infection and bacteria on these aluminum products can only be disinfected by disinfectants usually, but the use of disinfectants brings more troubles and increases labor maintenance costs, therefore, an anti-bacterial anodic oxide aluminum product is in urgent need.
  • nano-silver The anti-bacterial effect of nano-silver is always favored by people, and nowadays some nano-silver disinfectants are available on the market. However, they are not convenient for regular use, because they may bring more troubles and have high costs. And now there is no method of applying nano-silver into anodic oxide products of aluminum to provide the surface of anodized aluminum materials with an anti-bacterial effect.
  • the present invention provides a method for preparing an anti-bacterial anodic oxide film on the surface of aluminum materials.
  • a method for preparing an anti-bacterial oxide film on the surface of aluminum materials comprising the following steps:
  • polishing put the clean workpiece in an acid solution for chemical polishing
  • dyeing put the anodized workpiece in a dye tank which contains a nano-dye, wherein the mass fraction of nano-silver in the dye is 3%-5% and its diameter is not more than 100 nm;
  • sealing seal the dyed workpiece via a high-temperature hydration or inorganic salt sealing method, and take out the sealed workpiece and dry it after cleaning.
  • an ultrasonic vibration plate is provided at the bottom of the dye tank in Step 4).
  • a bubble generator is provided at the bottom of the dye tank in Step 4) and dry and clean air is introduced into the bubble generator.
  • the diameter of bubbles generated by the bubble generator is not more than 2 mm.
  • the chemical polishing agent in Step 2) is nitric acid solution.
  • sulfuric acid solution is used in the acid tank in Step 3).
  • the workpiece is an aluminum or aluminum alloy workpiece.
  • the surface of the polished aluminum materials is smooth but has undulating waves and holes; in the dyeing after oxidation, the dye is filled into the undulating waves and holes on the surface of the aluminum materials, because the dye is a nano-material, so if nano-silver is uniformly mixed in the dye in the process, the dye in the surface of the aluminum materials will contain nano-silver when finished and it will protect the nano-silver from wearing during use; the dye-filled waves on the surface of the aluminum materials are sealed via a sealing process when finished, i.e., the dye is sealed in the surface of the aluminum material; at last, the surface of the aluminum materials can be turned into the desired colored patterns according to the actual needs when finished, and the nano-silver provides the anodic oxide film on the surface of the aluminum materials with an anti-bacterial effect.
  • a method for preparing an anti-bacterial oxide film on the surface of aluminum materials comprising the following steps:
  • the mass fraction of nano-silver in the dye is the mass ratio of the formed anti-bacterial anodic oxide film on the surface of the workpiece; when the nano-silver content is less than 3%, the anti-bacterial effect is not good, while when the nano silver content is more than 5%, the cost is too high and the use may be incomplete, therefore, taking a comprehensive consideration, the nano-silver content is set to 3%-5% when finished.
  • an ultrasonic vibration plate is provided at the bottom of the dye tank in Step 4). Nano-silver will sink when mixed in the dye, because it is a metal heavier than the dye; if the nano-silver sinks, the nano-silver is not easily taken by the dye onto the surface of the workpiece in the dyeing process; in order to avoid this situation, the ultrasonic vibration plate is provided at the bottom of the dye tank to prevent the nano-silver from sinking by way of vibration and improving the dyeing efficiency during the vibration process.
  • a bubble generator is provided at the bottom of the dye tank in Step 4) and dry and clean air is introduced into the bubble generator. Because dry and clean air is introduced into the bubble generator, bubbles generated by the bubble generator are all dry and clean air when finished; in order to enhance the final anti-bacterial property of the anodic oxidation film, nano-silver has to be distributed uniformly in the dye, and air bubbles in the dye tank play a stirring role to facilitate the uniform distribution of the nano-silver in the dye.
  • the diameter of the bubbles generated by the bubble generator is not more than 2 mm. Because both the dye and nano-silver are nano-materials, overly large bubbles cause a greater stirring force to be needed, are not conducive to the mixing of nano-silver in the dye, and result in non-uniform dyeing of the surface due to the impact of bubbles on the surface of the workpiece in the dyeing process, thus influencing the final product quality.
  • the chemical polishing agent in Step 2) is nitric acid solution.
  • sulfuric acid solution is used in the acid tank in Step 3).
  • the workpiece is an aluminum or aluminum alloy workpiece.
  • Anti-bacterial anodic oxidation is applicable to both aluminum products and aluminum alloy products.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)
US15/348,477 2016-10-18 2016-11-10 Method for preparing anti-bacterial oxide film on the surface of aluminum materials Abandoned US20180105947A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610904874.9 2016-10-18
CN201610904874.9A CN106498476A (zh) 2016-10-18 2016-10-18 一种在铝材表面制备防菌阳极氧化膜的方法

Publications (1)

Publication Number Publication Date
US20180105947A1 true US20180105947A1 (en) 2018-04-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US15/348,477 Abandoned US20180105947A1 (en) 2016-10-18 2016-11-10 Method for preparing anti-bacterial oxide film on the surface of aluminum materials

Country Status (2)

Country Link
US (1) US20180105947A1 (zh)
CN (1) CN106498476A (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107937960A (zh) * 2017-12-01 2018-04-20 佛山市高明高盛铝业有限公司 一种铝合金阳极氧化工艺
CN107937958A (zh) * 2017-12-01 2018-04-20 佛山市高明高盛铝业有限公司 一种新型铝合金阳极氧化膜的制备工艺
CN113136612A (zh) * 2021-01-25 2021-07-20 深圳吉美瑞科技有限公司 一种阳极氧化抗菌金属件及其制备方法
CN114369856A (zh) * 2021-08-05 2022-04-19 广州市汉科建材科技有限公司 一种抗菌铝合金阳极氧化荧光膜的制备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60132422D1 (de) * 2000-10-25 2008-03-06 Gha Corp Verfahren zur Oberflächenbehandlung von Aluminium und Aluminiumlegierung
JP4363970B2 (ja) * 2003-12-15 2009-11-11 新日軽株式会社 アルミニウム材の表面処理方法
CN101649478B (zh) * 2008-08-14 2012-03-28 比亚迪股份有限公司 一种表面具有多色氧化膜的材料的制备方法以及设备
CN101550580B (zh) * 2009-04-04 2010-12-08 李继光 铝合金型材表面阳极氧化着色处理方法
CN102321904A (zh) * 2011-08-25 2012-01-18 东北大学 含镁高硅变形铝合金表面混合酸阳极氧化和封孔的方法
CN103320831B (zh) * 2012-03-22 2016-08-24 富泰华工业（深圳）有限公司 金属工件的阳极氧化染色方法
CN102703950A (zh) * 2012-06-27 2012-10-03 湖南迈迪科新材有限公司 一种医学外用铝合金多功能涂层的电化学制备方法
CN102925948B (zh) * 2012-10-15 2014-12-17 祁阳宏泰铝业有限公司 一种仿不锈钢铝材表面处理工艺
TWI506168B (zh) * 2014-01-29 2015-11-01 Catcher Technology Co Ltd 抗微生物複合表面的製造方法
CN105714352A (zh) * 2014-12-05 2016-06-29 可成科技股份有限公司 抗菌复合表面及形成抗菌复合表面的加工方法
CN104746121A (zh) * 2015-03-28 2015-07-01 丁彦天 一种压铸件镀铝及着色工艺

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Publication number Publication date
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