CN105506640A - Aluminum alloy surface treatment method - Google Patents
Aluminum alloy surface treatment method Download PDFInfo
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- CN105506640A CN105506640A CN201510784096.XA CN201510784096A CN105506640A CN 105506640 A CN105506640 A CN 105506640A CN 201510784096 A CN201510784096 A CN 201510784096A CN 105506640 A CN105506640 A CN 105506640A
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Abstract
The invention discloses an aluminum alloy surface treatment method. The aluminum alloy surface treatment method comprises the following steps: performing high-light trimming on aluminum alloy; putting the highlight-treated aluminum alloy in a chemical polishing solution to perform chemical polishing treatment, wherein the chemical polishing solution contains phosphoric acid, sulfuric acid and nitric acid, and the volume ratio of the phosphoric acid to the sulfuric acid to the nitric acid is 8 : 1 : 1; putting the chemically-polished aluminum alloy into an oxidation solution to perform anodic oxidation treatment, wherein the oxidation solution is a sulfuric acid water solution of which the concentration is 200+/-10g/L; the parameters of the anodic oxidation treatment are set as follows: the time is 8 min to 12 min, the voltage is 10V to 12V, and the temperature is 14 to 16 DEG C. According to the aluminum alloy surface treatment method, the highlight-treated aluminum alloy is subjected to chemical polishing treatment so that the aluminum alloy is smoother in surface corrosion and is relatively good in flatness; meanwhile, by regulating the anodic oxidation treatment parameters, a generated oxidation film is ensured to be more compact, relatively small in thickness and better in light transmittance.
Description
Technical field
The present invention relates to a kind of process for treating surface, particularly relate to a kind of aluminium alloy surface treatment method.
Background technology
At present, existing handset shell major part adopts plastic production to form.Plastic casing wears no resistance, and there will be the situations such as cut even fades after using for some time.Therefore, metal shell brought into use by existing middle and high end mobile phone, and it not only has exquisite outward appearance, and has feel exquisiteness, wear-resisting, shatter-resistant, the advantage such as anticorrosive, is thus doubly subject to liking of human consumer.
The making method of traditional handset shell is generally after first aluminium alloy being carried out an anodic oxidation, then through too high smooth trimming, then the aluminium alloy of Gao Guanghou is carried out two-step anodization, and technical process is complicated, and production cost is higher.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of aluminium alloy surface treatment method, its technical process is less, production cost is lower, and contributes to promoting processing yield.
A kind of aluminium alloy surface treatment method, comprises the steps:
Described aluminium alloy is carried out high light trimming;
Described being placed in of aluminium alloy of Gao Guanghou thrown in liquid and carry out chemical rightenning process, describedization is thrown liquid and is comprised phosphoric acid, sulfuric acid and nitric acid, and the volume ratio of phosphoric acid, sulfuric acid and nitric acid is 8:1:1;
Described aluminium alloy after chemical rightenning process is placed in oxidation solution and carries out anodic oxidation treatment, described oxidation solution is the aqueous sulfuric acid of 200 ± 10g/L, the optimum configurations of described anodic oxidation treatment is as follows: the time is 8 ~ 12min, and voltage is 10 ~ 12V, and temperature is 14 ~ 16 DEG C.
Above-mentioned aluminium alloy surface treatment method, by the aluminium alloy of Gao Guanghou is carried out chemical rightenning process, the surface corrosion of aluminium alloy can be made finer and smoother, planeness is better, meanwhile, by the adjustment of antianode oxide treatment parameter, make the oxide film of generation finer and close, thickness is less, and transparence is better.Compared with traditional technology, above-mentioned aluminium alloy surface treatment method, can reduce by an anode oxidation process, technical process is less, production cost is lower, and is conducive to improving production yield.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail below to the specific embodiment of the present invention.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public specific embodiment.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to be restriction the present invention.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.
A kind of aluminium alloy surface treatment method, comprises the steps:
S100, described aluminium alloy is carried out high light trimming;
Such as, CNC is adopted to carry out high light trimming to aluminium alloy, concrete, cut the hypotenuse of a circle light at the edge of aluminium alloy by CNC machine at a high speed.
S200, described being placed in of aluminium alloy of Gao Guanghou to be thrown in liquid and carry out chemical rightenning process, describedization is thrown liquid and is comprised phosphoric acid, sulfuric acid and nitric acid, and the volume ratio of phosphoric acid, sulfuric acid and nitric acid is 8:1:1;
S300, the described aluminium alloy after chemical rightenning process is placed in oxidation solution carries out anodic oxidation treatment, described anodizing solution is the aqueous sulfuric acid of 200 ± 10g/L, described anodised optimum configurations is as follows: the time is 8 ~ 12min, and voltage is 10 ~ 12V, and temperature is 14 ~ 16 DEG C.Such as, described anodised optimum configurations is as follows: the time is 9min, and voltage is 10V, and temperature is 15.4 DEG C.A good example is, described anodised optimum configurations is as follows: the time is 10min, and voltage is 11V, and temperature is 15 DEG C, and oxide film can be made so both close and thin.
Above-mentioned aluminium alloy surface treatment method, by the aluminium alloy of Gao Guanghou is carried out chemical rightenning process, the surface corrosion of aluminium alloy can be made finer and smoother, planeness is better, meanwhile, by the adjustment of antianode oxide treatment parameter, make the oxide film of generation finer and close, thickness is less, and transparence is better.Compared with traditional technology, above-mentioned aluminium alloy surface treatment method, can reduce by an anode oxidation process, technical process is less, production cost is lower, and is conducive to improving production yield.
Further, in order to the appearance effect reached after improving anodic oxidation treatment, such as, described anodised optimum configurations is as follows: the time is 10min, and voltage is 11V, and temperature is 15 DEG C, further adjusted by antianode oxide treatment parameter, to make the oxide film of generation finer and close, glossiness is better, the appearance effect reached after being conducive to improving anodic oxidation treatment.
Further, in order to improve the effect of chemical rightenning process, such as, chemical rightenning process is carried out under temperature is the condition of 80 ~ 90 DEG C, and chemical rightenning process is carried out under agitation.Such as, adopt the alr mode teetered, the frequency teetered is 10 ~ 60 times/min.It should be noted that, the frequency teetered described in this case, for stirring rake in the unit time is changing the number of times thrown liquid and move up and down.And for example, chemical rightenning process is carried out under aeration condition, and aeration rate is advisable to produce even bubbling in change throwing liquid, and and for example, the air capacity of aeration is 0.22 ~ 0.45m
3/ min.
In one embodiment of the invention, before described chemical rightenning process, also comprise step: the described aluminium alloy after high light trimming is carried out oil removal treatment.Described oil removal treatment specifically comprises, and the degreaser that the described aluminium alloy after high optical processing is placed in temperature 50 ~ 60 DEG C is carried out ultrasonication 3 ~ 5min, and described degreaser is the sodium phosphate of 45 ~ 55g/L, sodium carbonate and trisodium phosphate mixing solutions.By arranging oil removal treatment operation after high light trimming, the processing machine oil that the processing of high light remains in aluminum alloy product surface can be removed, increase sticking power and glossiness.Such as, in described degreaser, the mol ratio of sodium phosphate, sodium carbonate and trisodium phosphate is: 1:2:1, can remove the machining oil of aluminum alloy surface so preferably.
In another embodiment of the present invention, after described anodic oxidation treatment, also comprise step: the aluminium alloy after antianode oxide treatment carries out sealing pores.Such as, described sealing pores is specially, and the described aluminium alloy after anodic oxidation treatment is placed in the nickel sulfate solution that concentration is 10 ± 2g/L, temperature is 90 ± 5 DEG C, leaves standstill 20 ~ 30min.Sealing pores can improve the erosion resistance of Al-alloy products, increases the anti-dirty ability of aluminium alloy.And for example, after sealing pores, also comprise step: described aluminium alloy is washed and drying treatment.Such as, adopt baking oven to carry out drying treatment to aluminium alloy, dry temperature is 80 ± 5 DEG C.
Further, also step is comprised: the described aluminium alloy after anodic oxidation treatment is carried out washing process before described sealing pores, by arranging washing process after anodic oxidation treatment, the residual acid solution of aluminum alloy surface can be washed, ensure that follow-up sealing pores can carry out smoothly.Such as, washing process comprises three process, and the time of every procedure is 10 ± 5s, rinsing, can strengthen the cleanliness factor of cleaning, ensureing that subsequent handling can be carried out smoothly by washing process being set to three times.Preferably, the scavenging solution in washing process is pure water, and temperature is normal temperature.And for example, washing process comprises: after aluminium alloy being carried out water cleaning, being placed in temperature was 25 ± 5 DEG C, and concentration is ultrasonication 10 ± 5 minutes in the surface conditioner of 60 ± 10g/L, and the residual acid of aluminum alloy surface is flowed out, finally carries out water and cleans.Such as, surface conditioner is that Japan wild alumite TACSORMAL121 difficult to understand shows to adjust.
And for example, also step is comprised before described sealing pores: the aluminium alloy after washing process is carried out dyeing process.Such as, dyeing process is specially, and under the described aluminium alloy after washing process is placed in room temperature condition, pH is in the staining agent of 5.5 ± 0.5, leaves standstill 60 ± 10s.By dyeing process, aluminium alloy can be made to present distinct colors, meet different individual requirements.
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, measures according to national standard usually.If there is no corresponding national standard, then according to general international standard, normal condition or carry out according to the condition that manufacturer advises.
A kind of aluminium alloy surface treatment method, comprises the steps:
S101, high light trimming is carried out to aluminium alloy.
Such as, CNC is adopted to carry out high light trimming to aluminium alloy, concrete, cut the hypotenuse of a circle light at the edge of aluminium alloy by CNC machine at a high speed.In the present embodiment, before high light trimming, also comprise and sandblasting is carried out to aluminium alloy, to improve aluminum alloy surface planeness.
S102, the aluminium alloy after high light trimming is carried out oil removal treatment, to remove grease and the dirt of aluminum alloy surface.
Further, it comprises step specific as follows: aluminium alloy being placed in temperature is that the degreaser of 50 ~ 60 DEG C carries out oil removal treatment 3 ~ 5min, and wherein, oil removal treatment adopts ultrasonication, and ultrasonic power is 2.0 ~ 3.0KW; Such as, ultrasonic power is 2.8KW, the treatment time be 3 points 20 seconds.The sodium phosphate of degreaser to be concentration be 45 ~ 55g/L, sodium carbonate and trisodium phosphate mixing solutions, such as, often liter of concentration is that in the sodium phosphate of 45 ~ 55g/L, sodium carbonate and trisodium phosphate mixing solutions, the total content of sodium phosphate, sodium carbonate and trisodium phosphate is 45 ~ 55g.And for example, in sodium phosphate, sodium carbonate and trisodium phosphate mixing solutions, the molar ratio of phosphate radical, carbonate and pyrophosphate is 1:2:1, can obtain good cleaning effect like this.By arranging oil removal treatment operation after high light trimming, the machining oil that the processing of high light remains in aluminum alloy product surface can be removed, increase sticking power and glossiness.
It should be noted that, this step is mainly in order to remove grease and the dirt of aluminium alloy, ultrasonic power, time and degreaser are not limited to this, oil removal treatment can also be carried out under other conditions, under the prerequisite of metal shell is not corroded in guarantee, remove the grease in aluminum alloy surface and dirt as much as possible, for next step process is prepared.
In the present embodiment, also comprise: the aluminium alloy after oil removal treatment is carried out first time and wash process.Concrete, the aluminium alloy after oil removal treatment is carried out twice washing step; Such as, the aluminium alloy after oil removal treatment is placed in water and carries out twice ultrasonic cleaning.Such as, ultrasonic power is 2.0 ~ 3.0KW, and each time continued is 2 ~ 3min.
S103, the aluminium alloy after chemical rightenning process is carried out chemical rightenning process.
Concrete, it is 80 ~ 90 DEG C that aluminium alloy after first time washing process is placed in temperature, the volume ratio of phosphoric acid, sulfuric acid and nitric acid is carry out chemical rightenning process in the change throwing liquid of 8:1:1, chemical rightenning process is carried out under agitation, wherein, change throw liquid adopt concentration be 85% strong phosphoric acid, concentration be 98% the vitriol oil and concentration be 69% nitric acid be that 8:1:1 prepares according to volume ratio.In the present embodiment, chemical rightenning process is carried out under stirring and aeration condition.Concrete, adopt the alr mode teetered, the frequency teetered is 10 ~ 60 times/min.Aeration rate is advisable to produce even bubbling in change throwing liquid, and such as, the air capacity of aeration is 0.22 ~ 0.45m
3/ min.
In the present embodiment, also comprise: second time is carried out to the aluminium alloy after chemical rightenning process and washes process, to remove aluminum alloy surface residual solution; Such as, the aluminium alloy after chemical rightenning is placed in water and carries out twice ultrasonic cleaning.And for example, ultrasonic power is 2.0 ~ 3.0KW, and each time length is 2 ~ 3min.
S104, the aluminium alloy after chemical rightenning process is carried out anodic oxidation treatment.
Concrete, the aluminium alloy after second time washing process being placed in concentration is that the aqueous sulfuric acid of 200 ± 10g/L carries out anodic oxidation treatment, and the optimum configurations of anodic oxidation treatment is as follows: the time is 8 ~ 12min, and voltage is 10 ~ 12V, and temperature is 14 ~ 16 DEG C.Further, described anodised optimum configurations is as follows: the time is 10min, and voltage is 11V, and temperature is 15 DEG C.By controlling anodic oxidation condition, generate fine and close, uniform aluminum oxide film to make aluminum alloy surface.In the present embodiment, after anodic oxidation treatment, the thickness of the oxide film that aluminum alloy surface generates is 2.5 ~ 3.5 microns.And in traditional technology, needing through twice anodic oxidation treatment, after general anodic oxidation treatment for the first time, the thickness of oxide film is 8 ~ 12 microns, and after second time anodic oxidation treatment, the thickness of oxide film is 4 ~ 6 microns.Therefore, by improving aluminum alloy surface treatment process, can reduce by an anode oxidation process, and the oxide thickness generated is less, glossiness is better.
S105, the aluminium alloy after anodic oxidation treatment is carried out third time wash process.
Concrete, third time washing process comprises three process, and the time of every procedure is 10 ± 5s, rinsing, can strengthen the cleanliness factor of cleaning, ensureing that subsequent handling can be carried out smoothly by washing process being set to three times.Preferably, the scavenging solution in third time washing process is pure water, and temperature is normal temperature.And for example, third time washing process comprises: after aluminium alloy being carried out water cleaning, being placed in temperature was 25 ± 5 DEG C, and concentration is ultrasonication 10 ± 5 minutes in the surface conditioner of 60 ± 10g/L, and the residual acid of aluminum alloy surface is flowed out, finally carries out water and cleans.Such as, surface conditioner is that Japan wild alumite TACSORMAL121 difficult to understand shows to adjust.
S106, by third time washing process after aluminium alloy carry out dyeing process.
Concrete, under the described aluminium alloy after third time washing process is placed in room temperature condition, pH is in the staining agent of 5.5 ± 0.5, leaves standstill 60 ± 10s, completes dyeing process.
Further, also comprise: the aluminium alloy after dyeing process is carried out the 4th washing process, to remove the residual staining agent of aluminum alloy surface.Such as, the aluminium alloy after dyeing process is placed in water and carries out twice ultrasonic cleaning.And for example, ultrasonic power is 2.0 ~ 3.0KW, and each time continued is 2 ~ 3min.
S107, by dyeing process after aluminium alloy carry out sealing pores.
Concrete, the described aluminium alloy after the 4th washing process is placed in the nickel sulfate solution that concentration is 10 ± 2g/L, temperature is 90 ± 5 DEG C, leaves standstill 20 ~ 30min, complete sealing pores.Sealing pores can improve the erosion resistance of Al-alloy products, increases the anti-dirty ability of aluminium alloy.
S108, the aluminium alloy after sealing pores is carried out drying treatment.
Concrete, the aluminium alloy after sealing pores is carried out the 5th washing process, to remove the residual encapsulant of aluminum alloy surface.Such as, the aluminium alloy after sealing pores is placed in water and carries out three ultrasonic cleaning.Such as, ultrasonic power is 2.0 ~ 3.0KW, and each time continued is 2 ~ 3min.
Then, the aluminium alloy after the 5th washing process is carried out drying treatment.Concrete, the aluminium alloy after the 5th washing process being placed in temperature is that the baking oven of 80 ± 5 DEG C dries 5min.
In description of the invention, it is to be appreciated that term " first ", " second ", " the 3rd ", " the 4th ", " the 5th ", only for being distinguished in description, not special implication.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an aluminium alloy surface treatment method, is characterized in that, comprises the steps:
Described aluminium alloy is carried out high light trimming;
Described being placed in of aluminium alloy of Gao Guanghou thrown in liquid and carry out chemical rightenning process, describedization is thrown liquid and is comprised phosphoric acid, sulfuric acid and nitric acid, and the volume ratio of phosphoric acid, sulfuric acid and nitric acid is 8:1:1;
Described aluminium alloy after chemical rightenning process is placed in oxidation solution and carries out anodic oxidation treatment, described oxidation solution is the aqueous sulfuric acid of 200 ± 10g/L, the optimum configurations of described anodic oxidation treatment is as follows: the time is 8 ~ 12min, and voltage is 10 ~ 12V, and temperature is 14 ~ 16 DEG C.
2. aluminium alloy surface treatment method according to claim 1, is characterized in that, the optimum configurations of described anodic oxidation treatment is as follows: the time is 10min, and voltage is 11V, and temperature is 15 DEG C.
3. aluminium alloy surface treatment method according to claim 1, is characterized in that, described chemical rightenning process is carry out under the condition of 80 ~ 90 DEG C in temperature.
4. aluminium alloy surface treatment method according to claim 1, is characterized in that, also comprises step after described anodic oxidation treatment: carry out sealing pores to the described aluminium alloy after described anodic oxidation treatment.
5. aluminium alloy surface treatment method according to claim 4, it is characterized in that, described sealing pores is specially, and the described aluminium alloy after anodic oxidation treatment is placed in the nickel sulfate solution that concentration is 10 ± 2g/L, temperature is 90 ± 5 DEG C, leaves standstill 20 ~ 30min.
6. aluminium alloy surface treatment method according to claim 4, is characterized in that, also comprises step before described sealing pores: the described aluminium alloy after anodic oxidation treatment is carried out washing process.
7. aluminium alloy surface treatment method according to claim 6, is characterized in that, also comprises step before described sealing pores: the described aluminium alloy after washing process is carried out dyeing process.
8. aluminium alloy surface treatment method according to claim 7, is characterized in that, described dyeing process is specially, and under the described aluminium alloy after washing process is placed in room temperature condition, pH is in the staining agent of 5.5 ± 0.5, leaves standstill 60 ± 10s.
9. aluminium alloy surface treatment method according to claim 1, is characterized in that, before described chemical rightenning process: the described aluminium alloy after high light trimming is carried out oil removal treatment.
10. aluminium alloy surface treatment method according to claim 9, it is characterized in that, described oil removal treatment specifically comprises, the degreaser that described aluminium alloy after high optical processing is placed in temperature 50 ~ 60 DEG C is carried out ultrasonication 3 ~ 5min, and described degreaser is the sodium phosphate of 45 ~ 55g/L, sodium carbonate and trisodium phosphate mixing solutions.
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| CN105839161A (en) * | 2016-05-10 | 2016-08-10 | 广东长盈精密技术有限公司 | Dyeing method of metal component |
| CN105926018A (en) * | 2016-07-12 | 2016-09-07 | 长春奥生汽车零部件有限责任公司 | Aluminum alloy surface strengthening treatment method |
| CN106867275A (en) * | 2017-01-09 | 2017-06-20 | 广东长盈精密技术有限公司 | The preparation method of aluminium alloy dyeing black dyes, the colouring method of aluminium alloy |
| CN108360037A (en) * | 2018-03-28 | 2018-08-03 | 广东欧珀移动通信有限公司 | Aluminium alloy and its surface treatment method and application |
| CN108637597A (en) * | 2018-04-27 | 2018-10-12 | 维沃移动通信有限公司 | A kind of processing method of aluminium alloy component |
| CN111434807A (en) * | 2019-01-15 | 2020-07-21 | 广东长盈精密技术有限公司 | Surface treatment method of aluminum alloy material and application thereof |
| CN112210808A (en) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | Preparation method of black film |
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| CN105839161A (en) * | 2016-05-10 | 2016-08-10 | 广东长盈精密技术有限公司 | Dyeing method of metal component |
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| CN106867275B (en) * | 2017-01-09 | 2019-05-17 | 广东长盈精密技术有限公司 | The colouring method of the aluminium alloy dyeing preparation method of black dyes, aluminium alloy |
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| CN112210808A (en) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | Preparation method of black film |
| CN112210808B (en) * | 2020-09-29 | 2021-09-17 | 九牧厨卫股份有限公司 | Preparation method of black film |
| CN112695358A (en) * | 2020-11-25 | 2021-04-23 | 云南昆船机械制造有限公司 | Electrochemical conductive oxidation process method for aluminum and aluminum alloy |
| CN114434100A (en) * | 2022-01-18 | 2022-05-06 | 深圳市栢迪科技有限公司 | Treatment method of aluminum alloy blank, aluminum alloy blank and application |
| CN117655443A (en) * | 2023-10-07 | 2024-03-08 | 湖北秀山智能科技有限公司 | Radiator core with passivation layer, preparation method of radiator core and radiator |
| CN117655443B (en) * | 2023-10-07 | 2024-05-14 | 湖北秀山智能科技有限公司 | Radiator core with passivation layer, preparation method of radiator core and radiator |
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