CN106191955A - 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 PDFInfo
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- CN106191955A CN106191955A CN201610736789.6A CN201610736789A CN106191955A CN 106191955 A CN106191955 A CN 106191955A CN 201610736789 A CN201610736789 A CN 201610736789A CN 106191955 A CN106191955 A CN 106191955A
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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, put in the oxidation trough containing anodic oxidation electrolyte, simultaneously using stereotype as negative electrode, controlling temperature is 10 DEG C～10 DEG C, switches on power and proceeds by anodic oxidation, oxidizing process controls voltage after starting voltage gradually rises up to final voltage, deenergization, oxidation terminates, and must arrive surface and be formed with the aluminum alloy base material of anode oxide film.The anode oxide film that this technique obtains can not only meet common anode oxidation decoration function, and oxide-film relatively common anode oxidation technology hardness is higher, more resistant to scratch, damages, abrades, can promote customer experience and be worth.Present invention also offers anodized aluminum alloy and the terminal enclosure processed by anodized aluminum alloy.
Description
Technical field
The present invention relates to field of metal surface treatment technology, particularly relate to a kind of aluminium alloy anode oxide technique and anode
Aluminium oxide alloy.
Background technology
Along with electronics, the developing rapidly of communication equipment field, people are more and more higher to the quality requirements 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 there is excellent adsorption,
The advantage being easy to dyeing, thus meet ornamental high requirement, but oxide-film hardness is the highest, is easily bruised, scratch, scratch, lead
Cause outward appearance is affected, thus affects consumer experience.
Therefore, it is necessary to a kind of novel aluminum alloy anodized technique of exploitation, it can meet common anode oxidation
Decoration function, can improve again the hardness of anode oxide film, promotes customer experience and is worth.
Summary of the invention
In consideration of it, embodiments provide a kind of aluminium alloy anode oxide technique, the anodic oxidation that this technique obtains
Film can not only meet common anode oxidation decoration function, and oxide-film relatively common anode oxidation technology hardness is higher, more resistant to scratch,
Damage, abrade, customer experience can be promoted and be worth.
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, put in the oxidation trough containing anodic oxidation electrolyte, with
Time using stereotype as negative electrode, controlling temperature be-10 DEG C～10 DEG C, switches on power and proceeds by anodic oxidation, control in oxidizing process
Voltage processed is after starting voltage gradually rises up to final voltage, and deenergization, oxidation terminates, and must arrive surface and be formed with anodic oxidation
The aluminum alloy base material of film.
Alternatively, in oxidizing process, controlling electrolyte temperature constant is 5 DEG C ± 1 DEG C.
In the present invention, described starting voltage is 10-14V, and described final voltage is 24V-50V.Control voltage with 0.5V/
The speed of min-2V/min rises.
In the present invention, the time of whole oxidizing process controls at 10-50min.
In the present invention, described anodic oxidation electrolyte is the sulphuric acid of 150g/L～250g/L.
In the present invention, ungrease treatment that described pretreatment operation can include carrying out successively, for the first time desmut process, chemistry
Polishing and second time desmut process step.
The anode oxidation process of the present invention, may further include and carry out sealing pores and drying and processing 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 makees
With with high rigidity feature.
Present invention also offers a kind of anodized aluminum alloy, including aluminum alloy base material be formed at described aluminum alloy base material
The anode oxide film on surface, described anode oxide film includes oxide-film top layer and oxide-film nexine, the film on described oxide-film top layer
Hole is many compared with described oxide-film nexine, and in whole described anode oxide film, from described oxide-film top layer to described oxide-film nexine,
Fenestra distribution gradually decreases, and hardness is gradually increased.
In the present invention, the thickness of described oxide-film nexine is 60nm-70nm.The thickness of whole described anode oxide film is 8 μ
m-20μm.The fenestra distributive law on described oxide-film top layer is 80 × 109-100×109Individual/cm-2, the film of described oxide-film nexine
Pore size distribution rate is 30 × 109-40×109Individual/cm-2。
It addition, present invention also offers a kind of terminal enclosure and terminal.
Accompanying drawing explanation
The structural representation of the anodized aluminum alloy that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the terminal that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 is the wear-resisting test result figure of existing common aluminum alloy anode oxidation process gained anode oxide film；
Fig. 4 is the wear-resisting test result figure of the embodiment of the present invention 1 gained anode oxide film.
Detailed description of the invention
The following stated is the preferred implementation 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 without departing from embodiment of the present invention principle, it is also possible to make some improvements and modifications, these improve
With the protection domain that retouching is also considered as the embodiment of the present invention.
Embodiments provide a kind of aluminium alloy anode oxide technique, comprise the following steps:
Using aluminum alloy base material after pretreatment as anode, put in the oxidation trough containing anodic oxidation electrolyte, with
Time using stereotype as negative electrode, controlling temperature be-10 DEG C～10 DEG C, switches on power and proceeds by anodic oxidation, control in oxidizing process
Voltage processed is after starting voltage gradually rises up to final voltage, and deenergization, oxidation terminates, and must arrive surface and be formed with anodic oxidation
The aluminum alloy base material of film.
Embodiment of the present invention aluminium alloy anode oxide technique, controls temperature, at-10 DEG C～10 DEG C, to advantageously form hardness
Bigger 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 has different thickness and diverse from nexine
Structure, top layer is to compare final voltage low, and is formed under the voltage gradient being gradually increasing, and is a graded bedding, and fenestra is more, and in
Layer is formed under final voltage, and fenestra is less, and hardness is relatively big, autoxidation film top layer to oxide-film nexine, and fenestra distribution gradually subtracts
Few, hardness is gradually increased.So, oxide-film top layer is more due to fenestra, excellent adsorption, easy dyeing, can meet common anode oxygen
The decoration function changed, meanwhile, oxide-film nexine thickness, fenestra is few, hardness is big so that aluminium alloy more resistant to scratch, damage, abrade,
Thus promote customer experience and be worth.
In embodiment of the present invention, by controlling different starting voltage, final voltage, voltage increase rate and electrolysis liquid temperature
The technological parameters such as degree, can control to be 80 × 10 by the fenestra distributive law on described oxide-film top layer9-100×109Individual/cm-2, described
It is 30 × 10 that the fenestra distributive law of oxide-film nexine controls9-40×109Individual/cm-2。
Alternatively, in oxidizing process, controlling electrolyte temperature constant is 5 DEG C ± 1 DEG C.
In embodiment of the present invention, starting voltage, final voltage, voltage increase rate, oxidization time can be according to concrete institutes
The character of anode oxide film of need, thickness etc. set, and in the case of other process conditions are identical, voltage is the biggest, shape in oxide-film
The fenestra become is the biggest.
Alternatively, described starting voltage is 10-14V, and described final voltage is 24V-50V.
Alternatively, control voltage to rise with the speed of 0.5-2V/min.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 of whole oxidizing process control 10-50min (can be such as 10min, 20min, 30min,
40min、50min).Oxidization time is the longest, and the thickness of gained anode oxide film is the biggest.And the thickness of anode oxide film closes for aluminum
The outward appearance of gold has certain impact, and oxide-film is the thickest, and its electrochemical action is the biggest, and the corrosion to material nexine is the biggest, its material stricture of vagina
The most serious etc. fault in material, accordingly, it would be desirable to control the thickness of anode oxide film, conservative control oxidization time.
In the embodiment of the present invention, by controlling above-mentioned technological parameter, alternatively, the thickness of described oxide-film nexine is arranged
For 60nm-70nm.The thickness of whole described anode oxide film is set to 8-20 micron.
In embodiment of the present invention, described anodic oxidation electrolyte can be the sulphuric acid of 150g/L～250g/L.Specifically may be used
Be concentration as 150g/L, the sulphuric acid of 180g/L, 200g/L, 230g/L, 250g/L.
In embodiment of the present invention, described pretreatment operation can set according to aluminum alloy surface practical situation, the most permissible
Process including the ungrease treatment carried out successively, for the first time desmut, chemical polishing processes and second time desmut processes step.De-
Grit blasting operation is may also include before fat.In the embodiment of the present invention, above-mentioned each step operation includes water washing operations after completing.
Alternatively, in the step of ungrease treatment, use tertiary sodium phosphate defat in the basic conditions.The temperature of ungrease treatment is
50-60 DEG C, the time is 2-4min.In the step that first time desmut processes and second time desmut processes, use nitric acid stripping
Black film.The temperature that desmut processes is room temperature, and the time is 30-90s.In the step that chemical polishing processes, polishing agent uses pure
Phosphoric acid, its proportion is 1.69-1.71g/mL.The temperature that chemical polishing processes is 100-110 DEG C, and the time is 7-15s.
In embodiment of the present invention, anode oxidation process also can further include at carry out after oxidation terminates sealing pores and
Drying and processing.Its concrete operations are the routine operation in this area, and the embodiment of the present invention is not particularly limited.
Heretofore described aluminum alloy base material includes pack alloy, wrought aluminium alloy etc..
The aluminium alloy anode oxide technique that the embodiment of the present invention provides, simple to operate, gained anode oxide film has decoration concurrently
Effect and high rigidity feature.
As it is shown in figure 1, a kind of anodized aluminum alloy provided for the 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, described anode oxide film 12 includes oxide-film top layer 121 and oxidation
Film nexine 122, the fenestra more described oxide-film nexine more than 122 on described oxide-film top layer 121, from described oxide-film top layer 121 to
Described oxide-film nexine 122, fenestra distribution gradually decreases, and hardness is gradually increased.Wherein, oxide-film top layer 121 is that voltage is from just
Beginning voltage is gradually increasing and is not up to formed during final voltage, and oxide-film nexine 122 be formation under final voltage.
In the embodiment of the present invention, the thickness of described oxide-film nexine 122 is 60-70nm.The thickness of whole anode oxide film 12
Degree is 8-20 micron.The fenestra distributive law on described oxide-film top layer 121 is 80 × 109-100×109Individual/cm-2, described oxide-film
The fenestra distributive law of nexine 122 is 30 × 109-40×109Individual/cm-2。
It addition, the embodiment of the present invention additionally provides a kind of alloy product, described alloy product uses the present invention above-mentioned
Anodized aluminum alloy process.Described alloy product can be phone housing or other electronic product casings, or its
His Al-alloy parts.
As in figure 2 it is shown, the embodiment of the present invention also provides for a kind of terminal 100, it comprises employing embodiment of the present invention anodic oxygen
Change the terminal enclosure 10 that aluminium alloy processes.
Divide multiple embodiment 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 successively ungrease treatment, desmut process for the first time, chemical polishing process and second time
Desmut processes, and wherein, in the step of ungrease treatment, uses tertiary sodium phosphate defat in the basic conditions, the temperature of ungrease treatment
Degree is for 50-60 DEG C, and the time is 2-4min；In the step that first time desmut processes and second time desmut processes, use nitre
Acid desmut, the temperature that desmut processes is room temperature, and the time is 30-90s；In the step that chemical polishing processes, polishing agent is adopted
With pure phosphoric acid, its proportion is 1.69-1.71g/mL, and the temperature that chemical polishing processes is 100-110 DEG C, and the time is 7-15s.
(2) anodic oxidation containing 150g/L sulphuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode
In the oxidation trough of electrolyte, simultaneously using stereotype as negative electrode, controlling temperature is 10 DEG C, switches on power and proceeds by anodic oxidation,
In oxidizing process, control voltage is with the climbing speed of 1V/min after 14V gradually rises up to 24V, and deenergization, oxidation terminates, warp
After sealing of hole, drying and processing, surface must be arrived and be formed with the aluminum alloy base material of anode oxide film, obtain anodized aluminum alloy.
Use the resistance to grinding machine of vibration that the aluminum alloy sample after using existing common aluminum alloy anode oxidation process to process is carried out 2
The test of hour anti-wear performance；Use the aluminium alloy anode oxide PROCESS FOR TREATMENT vibrating resistance to grinding machine to using the embodiment of the present invention simultaneously
After aluminum alloy sample carry out wear-resisting test in 4 hours；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 pole oxidation technology gained anode oxide film, Fig. 4 is the resistance to of the embodiment of the present invention 1 gained anode oxide film
Mill test result figure.Result shows, existing common process gained anode oxide film is after 2 hours test, and more scraping occurs in surface
Trace；And present invention process gained anode oxide film is after 4 hours test, surface is without obvious scratch.Know through hardness test, this
The Vickers hardness of bright technique gained anode oxide film reaches 180-200HV, and existing common process gained anode oxide film Vickers
Hardness is only 120HV.
Existing common aluminum alloy anode oxidation process is: use sulphuric acid anodizing, the constant electricity of process conditions: 12-18V
Pressure, sulfuric acid concentration 150-250g/L, temperature 16-24 DEG C, oxidization time 30-60min, thickness 8-20 μm.
Embodiment 2
A kind of aluminium alloy anode oxide technique, comprises the following steps:
Aluminum alloy base material carries out ungrease treatment, desmut process for the first time successively, chemical polishing processes and second time is shelled
Black film processes, and wherein, in the step of ungrease treatment, uses tertiary sodium phosphate defat in the basic conditions, the temperature of ungrease treatment
For 50-60 DEG C, the time is 2-4min；In the step that first time desmut processes and second time desmut processes, use nitric acid
Desmut, the temperature that desmut processes is room temperature, and the time is 30-90s；In the step that chemical polishing processes, polishing agent uses
Pure phosphoric acid, its proportion is 1.69-1.71g/mL, and the temperature that chemical polishing processes is 100-110 DEG C, and the time is 7-15s.
The anodic oxidation electrolysis containing 250g/L sulphuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode
In the oxidation trough of liquid, simultaneously using stereotype as negative electrode, control temperature and be-10 DEG C, switch on power and proceed by anodic oxidation, oxidation
During control voltage with the climbing speed of 1V/min after 10V gradually rises up to 44V, deenergization, oxidation terminates, through envelope
After hole, drying and processing, surface must be arrived and be formed with the aluminum alloy base material of anode oxide film, obtain anodized aluminum alloy.
Embodiment 3
A kind of aluminium alloy anode oxide technique, comprises the following steps:
Aluminum alloy base material carries out ungrease treatment, desmut process for the first time successively, chemical polishing processes and second time is shelled
Black film processes, and wherein, in the step of ungrease treatment, uses tertiary sodium phosphate defat in the basic conditions, the temperature of ungrease treatment
For 50-60 DEG C, the time is 2-4min；In the step that first time desmut processes and second time desmut processes, use nitric acid
Desmut, the temperature that desmut processes is room temperature, and the time is 30-90s；In the step that chemical polishing processes, polishing agent uses
Pure phosphoric acid, its proportion is 1.69-1.71g/mL, and the temperature that chemical polishing processes is 100-110 DEG C, and the time is 7-15s.
The anodic oxidation electrolysis containing 200g/L sulphuric acid will be put into through above-mentioned pretreated aluminum alloy base material as anode
In the oxidation trough of liquid, simultaneously using stereotype as negative electrode, controlling temperature is 0 DEG C, switches on power and proceeds by anodic oxidation, aoxidized
Journey controls voltage with the climbing speed of 2V/min after 10V gradually rises up to 44V, deenergization, oxidation terminates, through sealing of hole,
After drying and processing, surface must be arrived and be formed with the aluminum alloy base material of anode oxide film, obtain anodized aluminum alloy.
The above disclosed present pre-ferred embodiments that is only, 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 process realizing above-described embodiment, and want according to right of the present invention
Seek made equivalent variations, still fall within the scope that invention is contained.
Claims (13)
1. an aluminium alloy anode oxide technique, it is characterised in that comprise the following steps:
Using aluminum alloy base material after pretreatment as anode, put in the oxidation trough containing anodic oxidation electrolyte, simultaneously with
Stereotype is as negative electrode, and controlling temperature is-10 DEG C～10 DEG C, switches on power and proceeds by anodic oxidation, controls electricity in oxidizing process
Pressure is after starting voltage gradually rises up to final voltage, and deenergization, oxidation terminates, and must arrive surface and be formed with anode oxide film
Aluminum alloy base material.
2. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that described starting voltage is 10V-14V, institute
Stating final voltage is 24V-50V.
3. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that control voltage with 0.5V/min-2V/
The speed of min rises.
4. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that the time of whole oxidizing process controls
10min-50min。
5. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that described anodic oxidation electrolyte is
The sulphuric acid of 150g/L～250g/L.
6. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that described pretreatment operation includes entering successively
The ungrease treatment of row, for the first time desmut process, chemical polishing processes and second time desmut processes step.
7. aluminium alloy anode oxide technique as claimed in claim 1, it is characterised in that further include at oxidation and terminate laggard
Row sealing pores and drying and processing.
8. an anodized aluminum alloy, it is characterised in that include aluminum alloy base material and be formed at described aluminum alloy base material surface
Anode oxide film, described anode oxide film includes oxide-film top layer and oxide-film nexine, and the fenestra on described oxide-film top layer is relatively
Described oxide-film nexine is many, and in whole described anode oxide film, from described oxide-film top layer to described oxide-film nexine, fenestra
Distribution gradually decreases, and hardness is gradually increased.
9. anodized aluminum alloy as claimed in claim 8, it is characterised in that the fenestra distributive law on described oxide-film top layer is
80×109-100×109Individual/cm-2, the fenestra distributive law of described oxide-film nexine is 30 × 109-40×109Individual/cm-2。
10. anodized aluminum alloy as claimed in claim 8, it is characterised in that the thickness of described oxide-film nexine is 60nm-
70nm。
11. anodized aluminum alloy as claimed in claim 8, it is characterised in that the thickness of described anode oxide film be 8 μm-
20μm。
12. 1 kinds of terminal enclosure, it is characterised in that described terminal enclosure uses the anodic oxygen described in any one of claim 8-11
Change aluminium alloy to process.
13. 1 kinds of terminals, it is characterised in that include terminal enclosure as claimed in claim 12.
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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 |
| CN112721352A (en) * | 2020-12-30 | 2021-04-30 | 中南大学 | Preparation method of metal-plastic mixed structural part based on secondary anodic oxidation method |
| CN112921378A (en) * | 2021-01-21 | 2021-06-08 | 广州市晨创玻璃发展有限公司 | Aluminum alloy surface oxidation treatment method and aluminum alloy ceramic water pipe |
| CN115305546A (en) * | 2022-08-31 | 2022-11-08 | 佛山力邦通信设备科技有限公司 | Internal and external different oxidation process for aluminum alloy special-shaped cavity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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| CN110528045A (en) * | 2019-08-21 | 2019-12-03 | 歌尔股份有限公司 | The surface treatment method of metal material |
| CN112721352A (en) * | 2020-12-30 | 2021-04-30 | 中南大学 | Preparation method of metal-plastic mixed structural part based on secondary anodic oxidation method |
| CN112721352B (en) * | 2020-12-30 | 2022-07-22 | 中南大学 | Preparation method of metal-plastic mixed structural part based on secondary anodic oxidation method |
| CN112921378A (en) * | 2021-01-21 | 2021-06-08 | 广州市晨创玻璃发展有限公司 | Aluminum alloy surface oxidation treatment method and aluminum alloy ceramic water pipe |
| CN115305546A (en) * | 2022-08-31 | 2022-11-08 | 佛山力邦通信设备科技有限公司 | Internal and external different oxidation process for aluminum alloy special-shaped cavity |
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Address after: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Patentee after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Patentee before: Guangdong OPPO Mobile Communications Co., Ltd. |
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