CN106191955B - A kind of aluminium alloy anode oxide technique and anodized aluminum alloy - Google Patents

A kind of aluminium alloy anode oxide technique and anodized aluminum alloy Download PDF

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Publication number
CN106191955B
CN106191955B CN201610736789.6A CN201610736789A CN106191955B CN 106191955 B CN106191955 B CN 106191955B CN 201610736789 A CN201610736789 A CN 201610736789A CN 106191955 B CN106191955 B CN 106191955B
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film
oxide
anode
aluminum alloy
anode oxide
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CN201610736789.6A
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CN106191955A (en
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侯体波
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广东欧珀移动通信有限公司
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Abstract

The invention provides a kind of aluminium alloy anode oxide technique, comprise the following steps:Using aluminum alloy base material after pretreatment as anode, it is put into the oxidation trough containing anodic oxidation electrolyte, negative electrode is used as using stereotype simultaneously, it is 10 DEG C~10 DEG C to control temperature, switch on power and proceed by anodic oxidation, control voltage is after starting voltage gradually rises up to final voltage in oxidizing process, deenergization, oxidation terminates, and obtains aluminum alloy base material of the surface formed with anode oxide film.The anode oxide film that the technique obtains can not only meet that common anode aoxidizes decoration function, and oxide-film is higher compared with common anode oxidation technology hardness, more resistant to scratch, damage, abrade, can lift customer experience value.The terminal enclosure being process present invention also offers anodized aluminum alloy and by anodized aluminum alloy.

Description

A kind of aluminium alloy anode oxide technique and anodized aluminum alloy

Technical field

The present invention relates to field of metal surface treatment technology, more particularly to a kind of aluminium alloy anode oxide technique and anode Aluminium oxide alloy.

Background technology

With electronics, the rapid development of communication equipment field, people are to the quality requirements more and more higher of electronic product, electronics Product fuselage material all-metal trend is obvious, wherein aluminium alloy casing coordinate anodized be current main way it One.

And the anode oxide film that existing aluminium alloy common anode oxidation processing technique is obtained, although having excellent adsorption, The advantages of being easy to dyeing, so as to meet ornamental high requirement, but it is not high to aoxidize film hardness, is easily bruised, scratch, scratch, lead Outward appearance is caused to be affected, so as to influence consumer experience.

Therefore, it is necessary to develop a kind of novel aluminum alloy anodized technique, it can meet that common anode aoxidizes Decoration function, and can improve the hardness of anode oxide film, lifting customer experience value.

The content of the invention

In consideration of it, the embodiments of the invention provide the anodic oxidation that a kind of aluminium alloy anode oxide technique, the technique obtain Film can not only meet that common anode aoxidizes decoration function, and oxide-film is higher compared with common anode oxidation technology hardness, more resistant to scratch, Damage, abrade, customer experience value can be lifted.

Specifically, the invention provides a kind of aluminium alloy anode oxide technique, comprise the following steps:

Using aluminum alloy base material after pretreatment as anode, it is put into the oxidation trough containing anodic oxidation electrolyte, together When using stereotype as negative electrode, control temperature be -10 DEG C~10 DEG C, switch on power and proceed by anodic oxidation, controlled in oxidizing process After starting voltage gradually rises up to final voltage, deenergization, oxidation terminates voltage processed, obtains surface formed with anodic oxidation The aluminum alloy base material of film.

Alternatively, in oxidizing process, it is 5 DEG C ± 1 DEG C to control electrolyte temperature constant.

In the present invention, the starting voltage is 10-14V, and the final voltage is 24V-50V.Control voltage is with 0.5V/ Min-2V/min speed rises.

In the present invention, the time control of whole oxidizing process is in 10-50min.

In the present invention, the anodic oxidation electrolyte is 150g/L~250g/L sulfuric acid.

In the present invention, the pretreatment operation may include the ungrease treatment, the processing of first time desmut, chemistry carried out successively Polishing and second of desmut processing step.

The anode oxidation process of the present invention, it may further include and sealing pores and drying and processing are carried out after oxidation terminates.

The aluminium alloy anode oxide technique of the above-mentioned offer of the present invention, simple to operate, gained anode oxide film has decoration concurrently and made With with high rigidity feature.

Present invention also offers a kind of anodized aluminum alloy, including aluminum alloy base material and it is formed at the aluminum alloy base material The anode oxide film on surface, the anode oxide film include oxide-film top layer and oxide-film nexine, the film on the oxide-film top layer Hole is more compared with the oxide-film nexine, and in the whole anode oxide film, from the oxide-film top layer to the oxide-film nexine, Fenestra distribution gradually decreases, and hardness gradually increases.

In the present invention, the thickness of the oxide-film nexine is 60nm-70nm.The thickness of the whole anode oxide film is 8 μ m-20μm.The fenestra distributive law on the oxide-film top layer is 80 × 109-100×109Individual/cm-2, the film of the oxide-film nexine Pore size distribution rate is 30 × 109-40×109Individual/cm-2

In addition, present invention also offers a kind of terminal enclosure and terminal.

Brief description of the drawings

Fig. 1 is the structural representation of anodized aluminum alloy provided in an embodiment of the present invention;

Fig. 2 is the structural representation of terminal provided in an embodiment of the present invention;

Fig. 3 is the wear-resisting test result figure of anode oxide film obtained by existing common aluminum alloy anode oxidation process;

Fig. 4 is the wear-resisting test result figure of the gained anode oxide film of the embodiment of the present invention 1.

Embodiment

As described below is the preferred embodiment of the embodiment of the present invention, it is noted that for the common skill of the art For art personnel, on the premise of principle of the embodiment of the present invention is not departed from, some improvements and modifications can also be made, these improvement The protection domain of the embodiment of the present invention is also considered as with retouching.

The embodiments of the invention provide a kind of aluminium alloy anode oxide technique, comprise the following steps:

Using aluminum alloy base material after pretreatment as anode, it is put into the oxidation trough containing anodic oxidation electrolyte, together When using stereotype as negative electrode, control temperature be -10 DEG C~10 DEG C, switch on power and proceed by anodic oxidation, controlled in oxidizing process After starting voltage gradually rises up to final voltage, deenergization, oxidation terminates voltage processed, obtains surface formed with anodic oxidation The aluminum alloy base material of film.

Aluminium alloy anode oxide technique of the embodiment of the present invention, by temperature control at -10 DEG C~10 DEG C, advantageously form hardness Larger oxide-film, meanwhile, control voltage is gradual change, i.e., gradually rises up to a higher end from a relatively low starting voltage Only voltage so that the anode oxide film that aluminum alloy surface is formed, its top layer and nexine have different thickness and entirely different Structure, top layer are formed under the voltage gradient being gradually increasing low compared to final voltage, are a graded bedding, and fenestra is more, and in Layer is formed under final voltage, and fenestra is less, and hardness is larger, autoxidation film top layer to oxide-film nexine, and fenestra distribution gradually subtracts Few, hardness gradually increases.So, oxide-film top layer due to fenestra it is more, excellent adsorption, easy dyeing, common anode oxygen can be met The decoration function of change, meanwhile, oxide-film nexine thickness, fenestra is few, hardness is big so that aluminium alloy more resistant to scratch, damage, abrade, So as to lift customer experience value.

In embodiment of the present invention, by controlling different starting voltages, final voltage, voltage increase rate and electrolysis liquid temperature The technological parameters such as degree, can be 80 × 10 by the fenestra distributive law control on the oxide-film top layer9-100×109Individual/cm-2, it is described The fenestra distributive law control of oxide-film nexine is 30 × 109-40×109Individual/cm-2

Alternatively, in oxidizing process, it is 5 DEG C ± 1 DEG C to control electrolyte temperature constant.

In embodiment of the present invention, starting voltage, final voltage, voltage increase rate, oxidization time can be according to specific institutes The settings such as the property of anode oxide film that needs, thickness, in the case of other process conditions identicals, voltage is bigger, shape in oxide-film Into fenestra it is bigger.

Alternatively, the starting voltage is 10-14V, and the final voltage is 24V-50V.

Alternatively, control voltage is risen with 0.5-2V/min speed.Can be specifically 0.5V/min, 2V/min, 1V/ min、1.5V/min.Pulse rate is fast, and the structure of film is more complicated, and film forming speed is faster.

Alternatively, the time control of whole oxidizing process 10-50min (such as can be 10min, 20min, 30min, 40min、50min).Oxidization time is longer, and the thickness of gained anode oxide film is bigger.And the thickness of anode oxide film closes for aluminium The outward appearance of gold has certain influence, and oxide-film is thicker, and its electrochemical action is bigger, and the corrosion to material nexine is bigger, its material line It is more serious etc. fault in material, therefore, it is necessary to control the thickness of anode oxide film, rationally control oxidization time.

In the embodiment of the present invention, by controlling above-mentioned technological parameter, alternatively, the thickness of the oxide-film nexine is set For 60nm-70nm.The thickness of the whole anode oxide film is arranged to 8-20 microns.

In embodiment of the present invention, the anodic oxidation electrolyte can be 150g/L~250g/L sulfuric acid.Specifically may be used To be sulfuric acid of the concentration as 150g/L, 180g/L, 200g/L, 230g/L, 250g/L.

In embodiment of the present invention, the pretreatment operation can be set according to aluminum alloy surface actual conditions, such as can be with Including ungrease treatment, the processing of first time desmut, chemical polishing processing and second of the desmut processing step carried out successively.It is de- Grit blasting operation is may also include before fat.Include water washing operations after the completion of above-mentioned each step operation in the embodiment of the present invention.

Alternatively, in the step of ungrease treatment, using tertiary sodium phosphate degreasing in the basic conditions.The temperature of ungrease treatment is 50-60 DEG C, time 2-4min.In the step of processing of first time desmut and second of desmut processing, shelled using nitric acid Black film.The temperature of desmut processing is room temperature, time 30-90s.In the step of chemical polishing is handled, polishing agent is using pure Phosphoric acid, its proportion are 1.69-1.71g/mL.The temperature of chemical polishing processing is 100-110 DEG C, time 7-15s.

In embodiment of the present invention, anode oxidation process can also further comprise after oxidation terminates carry out sealing pores and Drying and processing.Its concrete operations is routine operation in the art, and the embodiment of the present invention is not particularly limited.

Heretofore described aluminum alloy base material includes pack alloy, wrought aluminium alloy etc..

Aluminium alloy anode oxide technique provided in an embodiment of the present invention, simple to operate, gained anode oxide film has decoration concurrently Effect and high rigidity feature.

As shown in figure 1, be a kind of anodized aluminum alloy provided in an embodiment of the present invention, including aluminum alloy base material 11 and shape The anode oxide film 12 on aluminum alloy base material surface described in Cheng Yu, the anode oxide film 12 include oxide-film top layer 121 and oxidation Film nexine 122, the fenestra oxide-film nexine more than 122 on the oxide-film top layer 121, from the oxide-film top layer 121 to The oxide-film nexine 122, fenestra distribution gradually decrease, and hardness gradually increases.Wherein, oxide-film top layer 121 is voltage from first Beginning voltage is gradually increasing and not up to formed during final voltage, and oxide-film nexine 122 is to be formed under final voltage.

In the embodiment of the present invention, the thickness of the oxide-film nexine 122 is 60-70nm.The thickness of whole anode oxide film 12 Spend for 8-20 microns.The fenestra distributive law on the oxide-film top layer 121 is 80 × 109-100×109Individual/cm-2, the oxide-film The fenestra distributive law of nexine 122 is 30 × 109-40×109Individual/cm-2

In addition, the embodiment of the present invention additionally provides a kind of alloy product, the alloy product is above-mentioned using the present invention Anodized aluminum alloy be process.The alloy product can be phone housing or other electronic product casings, or its His Al-alloy parts.

As shown in Fig. 2 the embodiment of the present invention also provides a kind of terminal 100, it includes and uses anodic oxygen of the embodiment of the present invention Change the terminal enclosure 10 that aluminium alloy is process.

Divide multiple embodiments that the embodiment of the present invention is further detailed below.

Embodiment 1

A kind of aluminium alloy anode oxide technique, comprises the following steps:

(1) aluminum alloy base material is carried out to ungrease treatment, the processing of first time desmut, chemical polishing processing and second successively Desmut processing, wherein, in the step of ungrease treatment, using tertiary sodium phosphate degreasing in the basic conditions, the temperature of ungrease treatment Spend for 50-60 DEG C, time 2-4min;In the step of processing of first time desmut and second of desmut processing, using nitre Sour desmut, the temperature of desmut processing is room temperature, time 30-90s;In the step of chemical polishing is handled, polishing agent is adopted With pure phosphoric acid, its proportion is 1.69-1.71g/mL, and the temperature of chemical polishing processing is 100-110 DEG C, time 7-15s.

(2) anodic oxidation containing 150g/L sulfuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode In the oxidation trough of electrolyte, while using stereotype as negative electrode, it is 10 DEG C to control temperature, switches on power and proceeds by anodic oxidation, With 1V/min climbing speed after 14V gradually rises up to 24V, deenergization, oxidation terminates control voltage in oxidizing process, warp After sealing of hole, drying and processing, aluminum alloy base material of the surface formed with anode oxide film is obtained, produces anodized aluminum alloy.

2 are carried out to the aluminum alloy sample after being handled using existing common aluminum alloy anode oxidation process using resistance to grinding machine is vibrated Hour anti-wear performance test;Simultaneously using the resistance to grinding machine of vibration to the aluminium alloy anode oxide PROCESS FOR TREATMENT using the embodiment of the present invention Aluminum alloy sample afterwards carries out 4 hours wear-resisting tests;As shown in Figure 3 and Figure 4, Fig. 3 is existing common aluminum alloy sun to test result The wear-resisting test result figure of anode oxide film obtained by the oxidation technology of pole, Fig. 4 are the resistance to of the gained anode oxide film of the embodiment of the present invention 1 Grind test result figure.As a result show, for anode oxide film obtained by existing common process after test in 2 hours, more scrape occurs in surface Trace;And present invention process obtained by anode oxide film through 4 hours test after, surface is without obvious scratch.Know through hardness test, this hair The Vickers hardness of anode oxide film obtained by bright technique reaches 180-200HV, and anode oxide film Vickers obtained by existing common process Hardness is only 120HV.

Existing common aluminum alloy anode oxidation process is:Using sulphuric acid anodizing, process conditions:The constant electricity of 12-18V Pressure, sulfuric acid concentration 150-250g/L, 16-24 DEG C of temperature, oxidization time 30-60min, 8-20 μm of thickness.

Embodiment 2

A kind of aluminium alloy anode oxide technique, comprises the following steps:

Aluminum alloy base material is carried out to ungrease treatment, the processing of first time desmut, chemical polishing processing successively and shelled for second Black film processing, wherein, in the step of ungrease treatment, using tertiary sodium phosphate degreasing in the basic conditions, the temperature of ungrease treatment For 50-60 DEG C, time 2-4min;In the step of processing of first time desmut and second of desmut processing, using nitric acid Desmut, the temperature of desmut processing is room temperature, time 30-90s;In the step of chemical polishing is handled, polishing agent uses Pure phosphoric acid, its proportion are 1.69-1.71g/mL, and the temperature of chemical polishing processing is 100-110 DEG C, time 7-15s.

The anodic oxidation electrolysis containing 250g/L sulfuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode In the oxidation trough of liquid, while using stereotype as negative electrode, it is -10 DEG C to control temperature, switches on power and proceeds by anodic oxidation, is aoxidized During control voltage with 1V/min climbing speed after 10V gradually rises up to 44V, deenergization, oxidation terminates, through envelope After hole, drying and processing, aluminum alloy base material of the surface formed with anode oxide film is obtained, produces anodized aluminum alloy.

Embodiment 3

A kind of aluminium alloy anode oxide technique, comprises the following steps:

Aluminum alloy base material is carried out to ungrease treatment, the processing of first time desmut, chemical polishing processing successively and shelled for second Black film processing, wherein, in the step of ungrease treatment, using tertiary sodium phosphate degreasing in the basic conditions, the temperature of ungrease treatment For 50-60 DEG C, time 2-4min;In the step of processing of first time desmut and second of desmut processing, using nitric acid Desmut, the temperature of desmut processing is room temperature, time 30-90s;In the step of chemical polishing is handled, polishing agent uses Pure phosphoric acid, its proportion are 1.69-1.71g/mL, and the temperature of chemical polishing processing is 100-110 DEG C, time 7-15s.

The anodic oxidation electrolysis containing 200g/L sulfuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode In the oxidation trough of liquid, while using stereotype as negative electrode, it is 0 DEG C to control temperature, switches on power and proceeds by anodic oxidation, aoxidized With 2V/min climbing speed after 10V gradually rises up to 44V, deenergization, oxidation terminates control voltage in journey, through sealing of hole, After drying and processing, aluminum alloy base material of the surface formed with anode oxide film is obtained, produces anodized aluminum alloy.

Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly Enclose, one of ordinary skill in the art will appreciate that all or part of flow of above-described embodiment is realized, and will according to right of the present invention Made equivalent variations are sought, still falls within and invents covered scope.

Claims (9)

1. a kind of aluminium alloy anode oxide technique, it is characterised in that comprise the following steps:
Using aluminum alloy base material after pretreatment as anode, it is put into the oxidation trough containing anodic oxidation electrolyte, while with For stereotype as negative electrode, it is -10 DEG C~10 DEG C to control temperature, switches on power and proceeds by anodic oxidation, and electricity is controlled in oxidizing process With 0.5V/min-2V/min speed after starting voltage gradually rises up to final voltage, deenergization, oxidation terminates pressure, obtains To aluminum alloy base material of the surface formed with anode oxide film;The anodic oxidation electrolyte is 150g/L-250g/L sulfuric acid, whole The time control of individual oxidizing process is in 10min-50min;The top layer of the anode oxide film be low compared to final voltage, and by The graded bedding formed under the voltage gradient gradually risen, fenestra is more, and the fenestra distributive law on the oxide-film top layer is 80 × 109- 100×109Individual/cm2, the nexine of the anode oxide film formed under the final voltage, and fenestra is less, and hardness is larger, described The fenestra distributive law of oxide-film nexine is 30 × 109-40×109Individual/cm2, entirely in the anode oxide film, from the oxidation Film top layer to the oxide-film nexine, fenestra distribution gradually decreases, and hardness gradually increases.
2. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that the starting voltage is 10V-14V, institute It is 24V-50V to state final voltage.
3. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that the pretreatment operation includes entering successively Capable ungrease treatment, the processing of first time desmut, chemical polishing processing and second of desmut processing step.
4. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that further comprise laggard in oxidation end Row sealing pores and drying and processing.
5. a kind of anodized aluminum alloy, it is characterised in that including aluminum alloy base material and be formed at the aluminum alloy base material surface Anode oxide film, the anode oxide film includes oxide-film top layer and oxide-film nexine, the fenestra on the oxide-film top layer compared with The oxide-film nexine is more, and in the whole anode oxide film, from the oxide-film top layer to the oxide-film nexine, fenestra Distribution gradually decreases, and hardness gradually increases, and the fenestra distributive law on the oxide-film top layer is 80 × 109-100×109Individual/cm2, The fenestra distributive law of the oxide-film nexine is 30 × 109-40×109Individual/cm2, wherein, the anode oxide film is by electricity Pressure gradually rises up to the anode oxidation process formation of final voltage with 0.5V/min-2V/min speed from starting voltage.
6. anodized aluminum alloy as claimed in claim 5, it is characterised in that the thickness of the oxide-film nexine is 60nm- 70nm。
7. anodized aluminum alloy as claimed in claim 5, it is characterised in that the thickness of the anode oxide film is 8 μm -20 μm。
8. a kind of terminal enclosure, it is characterised in that the terminal enclosure is using the anodic oxidation described in claim any one of 5-7 Aluminium alloy is process.
9. a kind of terminal, it is characterised in that including terminal enclosure as claimed in claim 8.
CN201610736789.6A 2016-08-26 2016-08-26 A kind of aluminium alloy anode oxide technique and anodized aluminum alloy CN106191955B (en)

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CN107454213A (en) * 2017-06-30 2017-12-08 捷开通讯(深圳)有限公司 Realize method, shell and the terminal of metal housing surface texture
CN107740161A (en) * 2017-11-07 2018-02-27 童信淞 Aluminium alloy compression casting product anodic oxidation preparation method
CN109811386A (en) * 2019-02-09 2019-05-28 沈阳富创精密设备有限公司 A kind of anode oxidation process of boost mode
CN110528045A (en) * 2019-08-21 2019-12-03 歌尔股份有限公司 The surface treatment method of metal material

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Publication number Priority date Publication date Assignee Title
CN101104944A (en) * 2007-04-19 2008-01-16 上海交通大学 Process for preparing ordered porous aluminum oxide thin film
CN101275262A (en) * 2007-12-18 2008-10-01 华南理工大学 Control method for electrical parameters in micro-arc oxidation process
CN102953108A (en) * 2011-08-27 2013-03-06 沈阳黎明航空发动机(集团)有限责任公司 Technology for automatically controlling hard anodic oxidation

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CN101805919B (en) * 2010-04-26 2012-05-23 黑龙江科技学院 Anode clamp holder and use thereof

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Publication number Priority date Publication date Assignee Title
CN101104944A (en) * 2007-04-19 2008-01-16 上海交通大学 Process for preparing ordered porous aluminum oxide thin film
CN101275262A (en) * 2007-12-18 2008-10-01 华南理工大学 Control method for electrical parameters in micro-arc oxidation process
CN102953108A (en) * 2011-08-27 2013-03-06 沈阳黎明航空发动机(集团)有限责任公司 Technology for automatically controlling hard anodic oxidation

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