WO2016161964A1 - 铝合金及其阳极氧化方法 - Google Patents

铝合金及其阳极氧化方法 Download PDF

Info

Publication number
WO2016161964A1
WO2016161964A1 PCT/CN2016/078814 CN2016078814W WO2016161964A1 WO 2016161964 A1 WO2016161964 A1 WO 2016161964A1 CN 2016078814 W CN2016078814 W CN 2016078814W WO 2016161964 A1 WO2016161964 A1 WO 2016161964A1
Authority
WO
WIPO (PCT)
Prior art keywords
treatment
aluminum alloy
anodizing
chemical polishing
temperature
Prior art date
Application number
PCT/CN2016/078814
Other languages
English (en)
French (fr)
Inventor
曾元清
Original Assignee
广东欧珀移动通信有限公司
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 广东欧珀移动通信有限公司 filed Critical 广东欧珀移动通信有限公司
Priority to EP16776139.4A priority Critical patent/EP3239312B1/en
Priority to ES16776139T priority patent/ES2718241T3/es
Priority to US15/521,992 priority patent/US10626517B2/en
Publication of WO2016161964A1 publication Critical patent/WO2016161964A1/zh
Priority to US15/686,359 priority patent/US20170350032A1/en

Links

Images

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
    • C25D11/16—Pretreatment, e.g. desmutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • 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
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12—Light metals
    • C23G1/125—Light metals aluminium
    • 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
    • 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
    • C25D11/18—After-treatment, e.g. pore-sealing

Definitions

  • the invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy and an anodizing method thereof.
  • the existing anodizing technology generally uses 5 series and 6 series aluminum alloys for anodizing to protect the surface of aluminum.
  • the strength of 5 and 6 series aluminum alloy materials lower, there are many restrictions on the structural design.
  • the strength of the 7 series of high-strength aluminum alloy is high.
  • the 7 series of high-strength aluminum alloys generally adopt other surface treatments such as electrophoresis, such as anodizing the 7 series of high-strength aluminum alloys, and the surface thereof is easy to form a texture.
  • the external light is not strong.
  • the purpose of the embodiments of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide an aluminum alloy which can simultaneously have high strength and good gloss.
  • Another object of the embodiments of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide an anodizing method for an aluminum alloy, which can obtain an aluminum alloy having high strength and good gloss at the same time.
  • An aluminum alloy consisting of the following mass percentage components: Zn 5.0% to 5.4%, Mg 0.9% to 1.2%, Cu ⁇ 0.05%, Si ⁇ 0.05%, Fe ⁇ 0.1%, Mn ⁇ 0.05%, Zr ⁇ 0.1%, Ti ⁇ 0.05%, other impurities ⁇ 0.15%, and the balance is Al.
  • An anodizing method for an aluminum alloy comprising the steps of degreasing treatment, first stripping black film treatment, chemical polishing treatment, second stripping black film treatment, anodizing treatment, sealing treatment and drying treatment.
  • the aluminum alloy provided by the embodiment of the invention has the effect of eliminating the formation of the compound relative to the grain, Have a higher strength.
  • the anodizing method of the aluminum alloy provided by the embodiment of the invention makes the aluminum alloy not appear grain after anodizing, has good surface gloss, and has high strength.
  • Figure 1 is an apparent schematic view of an AlZnMgCu strengthening phase
  • FIG. 3 is a surface effect view of an anodized aluminum alloy according to Embodiment 2 of the present invention.
  • Fig. 4 is a view showing the surface effect of the anodized aluminum alloy according to Example 3 of the present invention.
  • the invention provides an aluminum alloy, which is composed of the following mass percentage components: Zn 5.0% to 5.4%, Mg 0.9% to 1.2%, Cu ⁇ 0.05%, Si ⁇ 0.05%, Fe ⁇ 0.1%, Mn ⁇ 0.05%, Zr ⁇ 0.1%, Ti ⁇ 0.05%, other impurities ⁇ 0.15%, and the balance being Al.
  • the aluminum alloy is composed of the following mass percentage components: Zn 5.15% to 5.197%, Mg 0.900% to 0.980%, Cu ⁇ 0.0015%, Si ⁇ 0.0464%, Fe ⁇ 0.0990%, Mn ⁇ 0.0019%, Zr ⁇ 0.1%, Ti ⁇ 0.028%, other impurities ⁇ 0.15%, and the balance is Al.
  • the aluminum alloy of the present invention is an aluminum alloy material mainly composed of aluminum zinc, magnesium and magnesium.
  • the strengthening phase in the aluminum alloy is mainly a Zn 2Mg phase and an AlZnMgCu phase, which are different strengthening zones formed in the alloy.
  • the strengthening zone formed by the AlZnMgCu phase in the alloy exhibits a severe grain during the anodization process, or becomes an aluminum squeezing, as shown in FIG. Therefore, in order to achieve a better gloss effect, the content of AlZnMgCu should be controlled as much as possible.
  • the lower the copper content the better the fireworks effect. If the copper content is high, the material will appear after anodizing. Therefore, the present invention controls the content of Cu to be ⁇ 0.05%.
  • the metal compound formed of Si, Fe, and Mn and Al causes the oxide film to become gray. Therefore, the present invention controls the Si content to be ⁇ 0.05%, the Fe content to be ⁇ 0.1%, and the Mn content to be ⁇ 0.05%.
  • the aluminum alloy of the present invention has high strength while eliminating the influence of other compounds on the grain.
  • the invention also provides an anodizing method for an aluminum alloy, comprising sequential degreasing treatment, first stripping black film treatment, chemical polishing treatment, second stripping black film treatment, anodizing treatment, sealing treatment and baking The steps of the dry process.
  • the step of sand blasting may also be included prior to the step of degreasing.
  • 150# zircon sand having a density of 2.5 kg/cm 2 can be selected.
  • the surface of the aluminum alloy after sandblasting is matte, and the surface of the aluminum alloy without sandblasting is reflective. Therefore, depending on the specific requirements of the appearance, sandblasting or non-blasting treatment can be selected.
  • trisodium phosphate is used for degreasing under alkaline conditions.
  • the temperature of the degreasing treatment is 50 to 60 ° C for 2 to 4 minutes, preferably, the temperature of the degreasing treatment is 55 ° C, and the time is 3 minutes.
  • a nitric acid stripping film is used.
  • the temperature at which the black film is removed is room temperature, and the time is 30 to 90 s. Preferably, the time is 1 min.
  • the surface gloss of the aluminum alloy before chemical polishing is high, the time of chemical polishing can be short, and the inventors of the present invention have repeatedly determined that the shortest time of chemical polishing is 7 seconds, and the surface glossiness can be satisfied. No grain requirements.
  • the gloss of the aluminum alloy before chemical polishing is low, the time of chemical polishing is prolonged, and the inventors of the present invention have repeatedly determined that the time of chemical polishing is up to 15 seconds; if it exceeds 15 seconds, the surface of the aluminum alloy A line of lines appears. After the chemical polishing step, the gloss of the aluminum alloy surface is 45-50.
  • the oxidizing agent is sulfuric acid having a concentration of 200 to 220 g/L.
  • the anodizing treatment temperature is 18 to 20 ° C
  • the voltage is 8 to 10 V
  • the time is 40 to 50 min.
  • the film thickness after anodizing has a certain influence on the appearance of the aluminum alloy.
  • the aluminum alloy of Example 1 was composed of the following mass percentage components: Zn 5.0%, Mg 0.9%, Cu 0.0018%, Si 0.021, Fe 0.0649, Mn 0.008%, Zr 0.0034%, Ti 0.02%, and other impurities 0.09%. The rest is Al.
  • the steps of the method for anodizing the aluminum alloy are: degreasing treatment, first black stripping treatment, The steps of chemical polishing treatment, second black peeling treatment, anodizing treatment, sealing treatment, and drying treatment.
  • the degreasing treatment was carried out by using trisodium phosphate under alkaline conditions, and the temperature of the degreasing treatment was 55 ° C for 3 min.
  • the first black stripping treatment was performed by nitric acid stripping of the black film, and the temperature at which the black film was peeled off was room temperature for 1 min.
  • the chemical polishing treatment polish uses pure phosphoric acid having a specific gravity of 1.69 to 1.71 g/mL, and the chemical polishing treatment temperature is 100 ° C for 15 s.
  • the surface of the aluminum alloy after chemical polishing treatment has a gloss of 45.
  • the second black stripping treatment was performed by stripping black film with nitric acid, and the temperature at which the black film was peeled off was room temperature for 1 min.
  • the oxidizing agent is sulfuric acid having a concentration of 220 g/L.
  • the anodizing treatment temperature was 18 ° C, the voltage was 8 V, and the time was 50 min.
  • the film thickness after the anodizing treatment was 10 ⁇ m.
  • the mechanical properties test results of the anodized aluminum alloy are as follows: the hardness of the material is up to 120 HV and the tensile strength is 350 MPa using the national standard of the material.
  • the surface effect of the anodized aluminum alloy is shown in Fig. 2. As can be seen from Fig. 2, the anodized aluminum alloy has a good surface gloss and no grain.
  • the aluminum alloy of Example 2 is composed of the following mass percentage components: Zn 5.2%, Mg 1.0%, Cu 0.002%, Si 0.031%, Fe 0.0035%, Mn 0.012%, Zr 0.0051%, Ti 0.024%, and other impurities. 0.07%, the rest is Al.
  • the steps of the method for anodizing the aluminum alloy are, in order, the steps of degreasing treatment, first stripping black film treatment, chemical polishing treatment, second stripping black film treatment, anodizing treatment, sealing treatment, and drying treatment.
  • the degreasing treatment was carried out by using trisodium phosphate under alkaline conditions, and the temperature of the degreasing treatment was 50 ° C for 4 minutes.
  • the first black stripping treatment uses a nitric acid stripping black film, and the temperature at which the black film is stripped is room temperature. The interval is 30s.
  • the chemical polishing treatment used pure phosphoric acid having a specific gravity of 1.69 to 1.71 g/mL, and the temperature of the chemical polishing treatment was 105 ° C for 11 s.
  • the surface of the aluminum alloy after chemical polishing treatment has a gloss of 50.
  • the second black stripping treatment was performed by using a nitric acid stripping black film, and the temperature at which the black film was peeled off was room temperature for 30 seconds.
  • the oxidizing agent is sulfuric acid having a concentration of 200 g/L.
  • the anodizing treatment temperature was 19 ° C, the voltage was 9 V, and the time was 45 min.
  • the film thickness after the anodizing treatment was 9.8 ⁇ m.
  • the mechanical properties test results of the anodized aluminum alloy are as follows: the hardness of the material is up to 116 HV and the tensile strength is 340 MPa using the national standard of the material.
  • the surface effect of the anodized aluminum alloy is shown in FIG. As can be seen from Fig. 3, the anodized aluminum alloy has a good surface gloss and no texture.
  • the aluminum alloy of Example 3 was composed of the following mass percentage components: Zn 5.4%, Mg 1.2%, Cu 0.0015%, Si 0.0318%, Fe 0.049%, Mn 0.008%, Zr 0.0034%, Ti 0.02%, other impurities. 0.09%, the rest is Al.
  • the steps of the method for anodizing the aluminum alloy are, in order, the steps of degreasing treatment, first stripping black film treatment, chemical polishing treatment, second stripping black film treatment, anodizing treatment, sealing treatment, and drying treatment.
  • the degreasing treatment is degreased under alkaline conditions using trisodium phosphate, and the degreasing treatment temperature is 60 ° C for 2 min.
  • the first black stripping treatment was performed by stripping black film with nitric acid, and the temperature at which the black film was peeled off was room temperature for 90 s.
  • the chemical polishing treatment uses a pure phosphoric acid having a specific gravity of 1.69 to 1.71 g/mL, a chemical polishing treatment temperature of 110 ° C, and a gloss of 45 on the surface of the aluminum alloy after chemical polishing treatment for 8 seconds.
  • the second black stripping treatment was performed by using a nitric acid stripping black film, and the temperature at which the black film was peeled off was room temperature for a period of 90 s.
  • the oxidizing agent is sulfuric acid having a concentration of 220 g/L.
  • the anodizing treatment temperature was 20 ° C, the voltage was 10 V, and the time was 40 min.
  • the film thickness after the anodizing treatment was 8 ⁇ m.
  • the mechanical properties test results of the anodized aluminum alloy are as follows: the hardness of the material is up to 110 HV and the tensile strength is 334 MPa using the national standard of the material.
  • the surface effect of the anodized aluminum alloy is shown in FIG. As can be seen from Fig. 4, the anodized aluminum alloy has a good surface gloss and no grain.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Conductive Materials (AREA)

Abstract

一种铝合金及其阳极氧化方法，该铝合金由如下质量百分含量的成分组成：Zn5.0％～5.4％、Mg0.9％～1.2％、Cu＜0.05％、Si＜0.05％、Fe＜0.1％、Mn＜0.05％、Zr＜0.1％、Ti＜0.05％、其他杂质＜0.15％，其余为Al。该阳极氧化方法，包括依次进行的脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。该铝合金在消除形成的化合相对料纹的影响的同时，具有较高的强度。

Description

铝合金及其阳极氧化方法 技术领域
本发明属于铝合金技术领域，具体涉及一种铝合金及其阳极氧化方法。
背景技术
现有的阳极氧化技术，一般采用5系列和6系列铝合金做阳极氧化来实现对铝材表面的保护，但由于5系和6系铝合金成分的原因，5系和6系铝合金材料强度较低，在结构设计上受到很多限制。7系列的高强铝合金强度高，但是，现有技术中，7系列的高强铝合金一般采用电泳等其他的表面处理，如对7系列的高强铝合金进行阳极氧化，其表面容易生成料纹，外光表现力不强。
发明内容
本发明实施例的目的在于克服现有技术的上述不足，提供一种铝合金，可以同时具有高强度及较好光泽。
本发明实施例的另一目的在于克服现有技术的上述不足，提供一种铝合金的阳极氧化方法，可以得到同时具有高强度及较好光泽的铝合金。
为了实现上述发明实施例的目的，本发明技术方案如下：
一种铝合金，由如下质量百分含量的成分组成：Zn 5.0％～5.4％、Mg 0.9％～1.2％、Cu＜0.05％、Si＜0.05％、Fe＜0.1％、Mn＜0.05％、Zr＜0.1％、Ti＜0.05％、其他杂质＜0.15％，其余为Al。
一种铝合金的阳极氧化方法，包括依次进行的脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
本发明实施例提供的铝合金在消除形成的化合相对料纹的影响的同时，具 有较高的强度。
本发明实施例提供的铝合金的阳极氧化方法，使得铝合金在阳极氧化后不会出现料纹，表面光泽度好，并且具有较高的强度。
附图说明
图1为AlZnMgCu强化相的表观示意图；
图2为本发明实施例1的阳极氧化后的铝合金的表面效果图；
图3为本发明实施例2的阳极氧化后的铝合金的表面效果图；
图4为本发明实施例3的阳极氧化后的铝合金的表面效果图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图和实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供了一种铝合金，由如下质量百分含量的成分组成：Zn 5.0％～5.4％、Mg 0.9％～1.2％、Cu＜0.05％、Si＜0.05％、Fe＜0.1％、Mn＜0.05％、Zr＜0.1％、Ti＜0.05％、其他杂质＜0.15％，其余为Al。
优选的，该铝合金由如下质量百分含量的成分组成：Zn 5.15％～5.197％、Mg 0.900％～0.980％、Cu＜0.0015％、Si＜0.0464％、Fe＜0.0990％、Mn＜0.0019％、Zr＜0.1％、Ti＜0.028％、其他杂质＜0.15％，其余为Al。
本发明的铝合金是以铝锌镁为主的铝合金材料。铝合金中的强化相主要为Zn 2Mg相以及AlZnMgCu相，两者在合金中形成的不同的强化区。但AlZnMgCu相在合金中形成的强化区在阳极氧化过程中表现出严重的料纹，或者成为铝挤纹，如图1所示。因此，为了实现较好的光泽效果，应尽量控制AlZnMgCu的含量。此外，铜含量越低对烟花效果越好，如果铜含量高，阳极氧化后将出现料 纹，因此，本发明控制Cu的含量＜0.05％。另外Si、Fe、Mn三者和Al形成的金属化合物使得氧化膜变灰暗，因此，本发明控制Si含量＜0.05％，Fe含量＜0.1％，Mn含量＜0.05％。基于上述论述，本发明的铝合金中应尽量形成Zn 2Mg强化相，Zn和Mg的含量选择可以通过Zn 2Mg的原子比得到，通过式65×2/24＝5.4确定两者的质量比。因此，可控制Zn和Mg的质量比为5～6，优选Zn和Mg的质量比为5.4。通过上述成分的设计，本发明的铝合金在消除其他化合相对料纹的影响的同时，具有较高的强度。
本发明还提供了一种铝合金的阳极氧化方法，包括依次进行的脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
在脱脂处理的步骤之前还可以包括喷砂处理的步骤。喷砂处理的步骤中可以选择密度为2.5kg/cm2的150#锆砂。喷砂处理后再进行阳极氧化后的铝合金与不喷砂直接进行阳极氧化的铝合金相比，喷砂处理后的铝合金表面呈哑光色，没有喷砂的铝合金表面有反光。因此，可根据对外观的具体要求，选择喷砂或者不喷砂处理。
脱脂处理的步骤中，采用磷酸三钠在碱性条件下脱脂。脱脂处理的温度为50～60℃，时间为2～4min，优选的，脱脂处理的温度为55℃，时间为3min。
在第一次剥黑膜处理和第二次剥黑膜处理的步骤中，采用硝酸剥黑膜。剥黑膜处理的温度为室温，时间为30～90s，优选的，时间为1min。
在化学抛光处理的步骤中，抛光剂采用纯磷酸，其比重为1.69～1.71g/mL。化学抛光处理的温度为100～110℃，优选为100℃，时间为7～15s。化学抛光可以提高铝合金表面的光泽度。化学抛光的时间越长，化学腐蚀越多，光泽度越好。但是，由于料纹是率先形成于铝合金材料的内部，因此，随着化学抛光 时间的延长，化学腐蚀的增多，内部的料纹随着其表面的材料的腐蚀损失而呈现出来。因此，需要根据化学抛光之前的光泽度及料纹的深度来选择合适的化学抛光时间。当化学抛光之前的铝合金的表面光泽较高时，则化学抛光的时间可以较短，本发明的发明人经过反复多次实验确定化学抛光的最短时间为7秒则可以满足表面光泽度高及无料纹的要求。当化学抛光前的铝合金的光泽较低时，则延长化学抛光的时间，本发明的发明人经过反复多次实验确定化学抛光的时间最长为15秒；如果超过15秒，则铝合金表面出现线条状的料纹。经过化学抛光的步骤，铝合金表面的光泽为45～50。
阳极氧化处理的步骤中，氧化剂为浓度为200～220g/L的硫酸。阳极氧化处理的温度为18～20℃，电压为8～10V，时间为40～50min。阳极氧化的电压越大，膜孔越大，其晶向趋向越大，导致料纹越严重，因此控制阳极氧化的电压为8～10V，可以同时满足阳极氧化的效果和避免料纹的影响。阳极氧化后的膜厚对于铝合金的外观有一定影响，氧化膜越厚，其电化学作用就越大，对材料里层的腐蚀越大，其料纹等材料缺陷越严重，因此，需要控制阳极氧化后的膜厚。本发明的发明人经过反复多次实验确定阳极氧化后的膜厚为8～10μm时效果最好。阳极氧化的时间越长，膜厚越大，为了控制阳极氧化后的膜厚满足上述限定，因此，控制阳极氧化处理的时间定为40～50min。下面以具体的实施例对本发明的技术方案做进一步的说明。
实施例1
实施例1的铝合金由如下质量百分含量的成分组成：Zn 5.0％、Mg 0.9％、Cu 0.0018％、Si 0.021、Fe 0.0649、Mn 0.008％、Zr 0.0034％、Ti 0.02％，其他杂质0.09％，其余为Al。
该铝合金的阳极氧化的方法的步骤依次为：脱脂处理、第一次剥黑膜处理、 化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
其中，脱脂处理采用磷酸三钠在碱性条件下脱脂，脱脂处理的温度为55℃，时间为3min。第一次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时间为1min。化学抛光处理的抛光剂采用比重为1.69～1.71g/mL的纯磷酸，化学抛光处理的温度为100℃，时间为15s。经过化学抛光处理后的铝合金表面的光泽为45。第二次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时间为1min。阳极氧化处理的步骤中，氧化剂为浓度为220g/L的硫酸。阳极氧化处理的温度为18℃，电压为8V，时间为50min。阳极氧化处理后的膜厚为10μm。
该阳极氧化后的铝合金的力学性能测试结果如下：采用该材料的国家标准测试其硬度可达120HV，抗拉强度350Mpa。该阳极氧化后的铝合金的表面效果如图2所示。从图2中可以看出，该阳极氧化后的铝合金的表面光泽度好，无料纹。
实施例2
实施例2的铝合金由如下质量百分含量的成分组成：Zn 5.2％、Mg 1.0％、Cu 0.002％、Si 0.031％、Fe 0.0035％、Mn 0.012％、Zr 0.0051％、Ti 0.024％，其他杂质0.07％，其余为Al。
该铝合金的阳极氧化的方法的步骤依次为：脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
其中，脱脂处理采用磷酸三钠在碱性条件下脱脂，脱脂处理的温度为50℃，时间为4min。第一次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时 间为30s。化学抛光处理的抛光剂采用比重为1.69～1.71g/mL的纯磷酸，化学抛光处理的温度为105℃，时间为11s。经过化学抛光处理后的铝合金表面的光泽为50。第二次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时间为30s。阳极氧化处理的步骤中，氧化剂为浓度为200g/L的硫酸。阳极氧化处理的温度为19℃，电压为9V，时间为45min。阳极氧化处理后的膜厚为9.8μm。
该阳极氧化后的铝合金的力学性能测试结果如下：采用该材料的国家标准测试其硬度可达116HV，抗拉强度340Mpa。该阳极氧化后的铝合金的表面效果如图3所示。从图3中可以看出，该阳极氧化后的铝合金的表面光泽度好，无料纹。
实施例3
实施例3的铝合金由如下质量百分含量的成分组成：Zn 5.4％、Mg 1.2％、Cu 0.0015％、Si 0.0318％、Fe 0.049％、Mn 0.008％、Zr 0.0034％、Ti 0.02％、其他杂质0.09％，其余为Al。
该铝合金的阳极氧化的方法的步骤依次为：脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
其中，脱脂处理采用磷酸三钠在碱性条件下脱脂，脱脂处理的温度为60℃，时间为2min。第一次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时间为90s。化学抛光处理的抛光剂采用比重为1.69～1.71g/mL的纯磷酸，化学抛光处理的温度为110℃，时间为8s经过化学抛光处理后的铝合金表面的光泽为45。第二次剥黑膜处理采用硝酸剥黑膜，剥黑膜处理的温度为室温，时间为90s。阳极氧化处理的步骤中，氧化剂为浓度为220g/L的硫酸。阳极氧化处理的温度为20℃，电压为10V，时间为40min。阳极氧化处理后的膜厚为8μm。
该阳极氧化后的铝合金的力学性能测试结果如下：采用该材料的国家标准测试其硬度可达110HV，抗拉强度334Mpa。该阳极氧化后的铝合金的表面效果如图4所示。从图4中可以看出，该阳极氧化后的铝合金的表面光泽度好，无料纹。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包括在本发明的保护范围之内。

Claims (8)

  1. 一种铝合金，其特征在于，由如下质量百分含量的成分组成：Zn 5.0％～5.4％、Mg 0.9％～1.2％、Cu＜0.05％、Si＜0.05％、Fe＜0.1％、Mn＜0.05％、Zr＜0.1％、Ti＜0.05％、其他杂质＜0.15％，其余为Al。
  2. 如权利要求1所述的铝合金，其特征在于，由如下质量百分含量的成分组成：Zn 5.15％～5.197％、Mg 0.900％～0.980％、Cu＜0.0015％、Si＜0.0464％、Fe＜0.0990％、Mn＜0.0019％、Zr＜0.1％、Ti＜0.028％、其他杂质＜0.15％，其余为Al。
  3. 一种如权利要求1或2所述的铝合金的阳极氧化方法，其特征在于：包括依次进行的脱脂处理、第一次剥黑膜处理、化学抛光处理、第二次剥黑膜处理、阳极氧化处理、封孔处理和烘干处理的步骤。
  4. 如权利要求3所述的铝合金的阳极氧化方法，其特征在于：所述阳极氧化处理的温度为18～20℃，电压为8～10V，时间为40～50min，所述阳极氧化处理后的膜厚为8～10μm。
  5. 如权利要求3所述的铝合金的阳极氧化方法，其特征在于：所述化学抛光处理的温度为100～110℃，时间为7～15s。
  6. 如权利要求3所述的铝合金的阳极氧化方法，其特征在于：所述脱脂处理的温度为50～60℃，时间为2～4min。
  7. 如权利要求3所述的铝合金的阳极氧化方法，其特征在于：所述第一次剥黑膜处理和所述第二次剥黑膜处理的温度为室温，时间为30～90s。
  8. 如权利要求3～7任一项所述的铝合金的阳极氧化方法，其特征在于：在所述脱脂处理的步骤之前还包括喷砂处理的步骤。
PCT/CN2016/078814 2015-04-09 2016-04-08 铝合金及其阳极氧化方法 WO2016161964A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16776139.4A EP3239312B1 (en) 2015-04-09 2016-04-08 Aluminum alloy and anode oxidation method thereof
ES16776139T ES2718241T3 (es) 2015-04-09 2016-04-08 Aleación de aluminio y método de oxidación del ánodo de la misma
US15/521,992 US10626517B2 (en) 2015-04-09 2016-04-08 Aluminum alloy and method of anodizing same
US15/686,359 US20170350032A1 (en) 2015-04-09 2017-08-25 Aluminum alloy and method of anodizing same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510166276.1A CN104762538B (zh) 2015-04-09 2015-04-09 铝合金及其阳极氧化方法
CN201510166276.1 2015-04-09

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US15/521,992 A-371-Of-International US10626517B2 (en) 2015-04-09 2016-04-08 Aluminum alloy and method of anodizing same
US15/686,359 Continuation US20170350032A1 (en) 2015-04-09 2017-08-25 Aluminum alloy and method of anodizing same

Publications (1)

Publication Number Publication Date
WO2016161964A1 true WO2016161964A1 (zh) 2016-10-13

Family

ID=53644624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/078814 WO2016161964A1 (zh) 2015-04-09 2016-04-08 铝合金及其阳极氧化方法

Country Status (5)

Country Link
US (2) US10626517B2 (zh)
EP (1) EP3239312B1 (zh)
CN (1) CN104762538B (zh)
ES (1) ES2718241T3 (zh)
WO (1) WO2016161964A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113862526A (zh) * 2021-08-11 2021-12-31 广东华昌集团有限公司 一种用于建筑幕墙的铝型材及其制备方法

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI606122B (zh) 2013-09-30 2017-11-21 蘋果公司 具有高強度及外表吸引力之鋁合金
WO2016111693A1 (en) 2015-01-09 2016-07-14 Apple Inc. Processes to reduce interfacial enrichment of alloying elements under anodic oxide films and improve anodized appearance of heat treatable alloys
CN104762538B (zh) 2015-04-09 2017-01-25 广东欧珀移动通信有限公司 铝合金及其阳极氧化方法
US9970080B2 (en) 2015-09-24 2018-05-15 Apple Inc. Micro-alloying to mitigate the slight discoloration resulting from entrained metal in anodized aluminum surface finishes
CN105177669B (zh) * 2015-09-29 2017-07-28 广东欧珀移动通信有限公司 一种铝合金壳体的表面处理方法
CN105364637B (zh) * 2015-09-29 2018-03-16 广东欧珀移动通信有限公司 一种铝合金壳体的表面处理方法
CN106868361A (zh) * 2015-12-10 2017-06-20 华为技术有限公司 铝合金材料及应用该铝合金材料的外壳
US10174436B2 (en) 2016-04-06 2019-01-08 Apple Inc. Process for enhanced corrosion protection of anodized aluminum
US10208371B2 (en) 2016-07-13 2019-02-19 Apple Inc. Aluminum alloys with high strength and cosmetic appeal
US11352708B2 (en) 2016-08-10 2022-06-07 Apple Inc. Colored multilayer oxide coatings
CN106222664A (zh) * 2016-08-16 2016-12-14 广东欧珀移动通信有限公司 一种铝合金工件的表面处理方法、铝合金壳体及移动终端
US11242614B2 (en) 2017-02-17 2022-02-08 Apple Inc. Oxide coatings for providing corrosion resistance on parts with edges and convex features
CN106834834B (zh) * 2017-02-27 2018-10-16 东莞市铝美铝型材有限公司 一种电子产品用高强度铝合金及其制备方法
BR112019020061A2 (pt) 2017-04-05 2020-04-28 Novelis Inc liga de alumínio, produto, e, método para produzir um produto de alumínio.
CN108265210A (zh) * 2017-12-21 2018-07-10 歌尔股份有限公司 一种铝合金材料、铝合金制品及其制备方法
CN108166037A (zh) * 2018-01-10 2018-06-15 中铝瑞闽股份有限公司 一种控制铝材表面氧化膜粉化的阳极氧化处理工艺
US11345980B2 (en) 2018-08-09 2022-05-31 Apple Inc. Recycled aluminum alloys from manufacturing scrap with cosmetic appeal
US11549191B2 (en) 2018-09-10 2023-01-10 Apple Inc. Corrosion resistance for anodized parts having convex surface features
CN110318084B (zh) * 2019-08-14 2021-05-14 深圳市晋铭航空技术有限公司 用于降低航空铝材零件阳极氧化后黑线料纹的实现方法
JP7336421B2 (ja) * 2020-08-21 2023-08-31 堺アルミ株式会社 アルミニウム合金圧延材およびその製造方法
CN112159944B (zh) * 2020-10-10 2022-07-26 中铝材料应用研究院有限公司 一种7000系铝材的制备方法
CN113215634B (zh) * 2021-04-15 2022-08-09 中国航空制造技术研究院 一种提高铝合金耐腐蚀及抗疲劳性能的方法
CN114888112A (zh) * 2022-05-27 2022-08-12 辽宁忠旺集团有限公司 一种7020铝合金型材及其挤压工艺
CN115233008A (zh) * 2022-08-30 2022-10-25 西南铝业（集团）有限责任公司 一种铸锭成分控制方法和应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4753240B2 (ja) * 2005-10-04 2011-08-24 三菱アルミニウム株式会社 高強度アルミニウム合金材ならびに該合金材の製造方法
CN103643235A (zh) * 2013-11-29 2014-03-19 台澳铝业（台山）有限公司 一种高光亮度铝合金抛光型材及其生产工艺
CN104278178A (zh) * 2014-09-28 2015-01-14 吉林利源精制股份有限公司 一种用于制造汽车保安部件的铝合金及其制备方法
CN104762538A (zh) * 2015-04-09 2015-07-08 广东欧珀移动通信有限公司 铝合金及其阳极氧化方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113164A (ja) * 1982-12-18 1984-06-29 Aisin Seiki Co Ltd 自動車用バンパ−の製造方法
JPH0656826B2 (ja) 1984-06-04 1994-07-27 東レ株式会社 コンデンサ
US5834148A (en) * 1996-04-09 1998-11-10 Mitsubishi Chemical Corporation Electrically-conductive substrate for electrophotographic photoreceptor, electrophotographic photoreceptor comprising same and process for the preparation thereof
US8608876B2 (en) 2006-07-07 2013-12-17 Aleris Aluminum Koblenz Gmbh AA7000-series aluminum alloy products and a method of manufacturing thereof
JP5588170B2 (ja) 2007-03-26 2014-09-10 アイシン軽金属株式会社 ７０００系アルミニウム合金押出材及びその製造方法
CN101665969A (zh) 2008-09-03 2010-03-10 深圳富泰宏精密工业有限公司 铝或铝合金表面阳极处理方法
CN102649209B (zh) * 2011-02-23 2015-08-12 汉达精密电子(昆山)有限公司 一种铝合金外观件的制作方法
JP5023233B1 (ja) * 2011-06-23 2012-09-12 住友軽金属工業株式会社 高強度アルミニウム合金材およびその製造方法
US20130270120A1 (en) * 2011-06-24 2013-10-17 Apple Inc. Cosmetic defect reduction in anodized parts
CN102888644B (zh) * 2011-07-18 2015-09-30 汉达精密电子(昆山)有限公司 铝合金阳极处理方法
TWI606122B (zh) 2013-09-30 2017-11-21 蘋果公司 具有高強度及外表吸引力之鋁合金

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4753240B2 (ja) * 2005-10-04 2011-08-24 三菱アルミニウム株式会社 高強度アルミニウム合金材ならびに該合金材の製造方法
CN103643235A (zh) * 2013-11-29 2014-03-19 台澳铝业（台山）有限公司 一种高光亮度铝合金抛光型材及其生产工艺
CN104278178A (zh) * 2014-09-28 2015-01-14 吉林利源精制股份有限公司 一种用于制造汽车保安部件的铝合金及其制备方法
CN104762538A (zh) * 2015-04-09 2015-07-08 广东欧珀移动通信有限公司 铝合金及其阳极氧化方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3239312A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113862526A (zh) * 2021-08-11 2021-12-31 广东华昌集团有限公司 一种用于建筑幕墙的铝型材及其制备方法

Also Published As

Publication number Publication date
EP3239312A4 (en) 2017-12-27
US20170327964A1 (en) 2017-11-16
EP3239312A1 (en) 2017-11-01
CN104762538A (zh) 2015-07-08
US10626517B2 (en) 2020-04-21
EP3239312B1 (en) 2019-02-20
CN104762538B (zh) 2017-01-25
ES2718241T3 (es) 2019-06-28
US20170350032A1 (en) 2017-12-07

Similar Documents

Publication Publication Date Title
WO2016161964A1 (zh) 铝合金及其阳极氧化方法
KR102191268B1 (ko) 개선된 외관 및/또는 내마모성을 가진 양극처리된 알루미늄 합금 제품 및 이의 제조 방법
US20190194780A1 (en) Aluminum alloy articles having improved bond durability and inert surface aluminum alloy articles and methods of making and using the same
KR101195458B1 (ko) 금속의 표면처리 방법
WO2017041203A1 (zh) 一种压铸铝合金及其制备方法
WO2015025706A1 (ja) 高強度アルミニウム合金及びその製造方法
JP7159479B2 (ja) 高度に変形可能で熱処理可能な連続コイル及びその製造方法
EP3219818A1 (en) Magnesium alloy and preparation method and use thereof
JP6457193B2 (ja) 接着耐久性に優れたアルミニウム合金材および接合体、または自動車部材
Peng et al. Preparation of anodic films on 2024 aluminum alloy in boric acid-containing mixed electrolyte
KR101545127B1 (ko) 금속 내외장재의 표면처리 방법 및 표면 처리된 금속 내외장재
ITTO20010149A1 (it) Procedimento di anodizzazione a basso impatto ecologico di un pezzo di alluminio o leghe di alluminio.
CN105970072A (zh) 一种铝合金
WO2016074424A1 (zh) 镁合金及其制备方法和应用
CN109161951B (zh) 一种镁合金微弧氧化电解液及其应用
KR101334323B1 (ko) 다이캐스팅 합금의 표면처리 방법 및 이에 의하여 제조된 표면구조를 가지는 다이캐스팅 합금재
WO2019065721A1 (ja) めっき形成黒心可鍛鋳鉄部材の製造方法、並びにめっき形成黒心可鍛鋳鉄部材及び管継手
KR101709472B1 (ko) 다이캐스팅 주조로 제조되는 아노다이징용 알루미늄 합금
JPH09263868A (ja) 塗膜密着性に優れるアルミニウム合金板及びその製造方法
JP2012107309A (ja) アルミニウム合金板、これを用いた接合体および自動車用部材
US2107318A (en) White coating on aluminum
JP5629099B2 (ja) 耐食性及び光輝性に優れた押出し用アルミニウム合金
CN105986295A (zh) 用于对铸造用铝合金进行表面处理的电解液和方法
WO2015151751A1 (ja) 表面処理アルミニウム材及び亜鉛添加アルミニウム合金
Hino et al. Effect of Surface Treatment on Glossiness of Al–Mg–Zn Alloy Casting

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: 16776139

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 15521992

Country of ref document: US

REEP Request for entry into the european phase

Ref document number: 2016776139

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE