CN108441918A - A kind of aluminum alloy surface treatment process - Google Patents
A kind of aluminum alloy surface treatment process Download PDFInfo
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- CN108441918A CN108441918A CN201810378880.4A CN201810378880A CN108441918A CN 108441918 A CN108441918 A CN 108441918A CN 201810378880 A CN201810378880 A CN 201810378880A CN 108441918 A CN108441918 A CN 108441918A
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- aluminum alloy
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/20—Electrolytic after-treatment
- C25D11/22—Electrolytic after-treatment for colouring layers
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of aluminum alloy surface treatment process, include the following steps：（1）Blasting treatment；（2）Ungrease treatment；（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method is：At 105 115 DEG C, 30 50s are polished using polishing fluid；（4）Anodic oxidation；（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, enables aluminum alloy to substrate surface and form anode oxide film dissolving, the porosity of oxidation film is made to increase；（6）Dyeing is handled；（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.The aluminum alloy surface treatment process of the present invention can form fine and close protective layer, enable aluminum alloy to from chemical erosion and oxidation.
Description
Technical field
The present invention relates to field of metal surface treatment technology, and in particular to a kind of aluminum alloy surface treatment process.
Background technology
Aluminium alloy is conductive good, and heat transfer is fast, light specific gravity, the advantages of being easy to be molded, becomes most widely used metal
One of.Aluminium is a kind of active metal, and surface easily generates oxidation film, and oxidation film is again loose porous, uneven and discontinuous, cannot
Protective layer as aluminium surface, it is therefore desirable to prepare protective layer in aluminium and aluminum alloy surface to achieve the purpose that antirust.Often now
Method is anodizing, forms conversion film in aluminum alloy surface by electrochemical method, although this method can be improved
The corrosion resisting property of aluminium alloy, but aluminum alloy conversion film layer wear-resisting property is not very significantly improved；And this layer of oxidation film
It is vulnerable to the corrosion of strong acid and highly basic, while aluminium and aluminium alloy are also easy to produce intercrystalline corrosion, case hardness is relatively low, not wear-resisting.
Invention content
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of aluminum alloy surface treatment process, energy are provided
It is enough to form fine and close protective layer, it enables aluminum alloy to from chemical erosion and oxidation.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of aluminum alloy surface treatment process, includes the following steps：
（1）Blasting treatment：Blasting treatment is carried out to aluminum alloy base material surface, the pressure of the blasting treatment is 0.22-
0.28Mpa, sand material grain size are 100-200 mesh；
（2）Ungrease treatment：Aluminum alloy base material is put into progress ungrease treatment 20-30min in alkaline degreaser, is taken out, using water
10-20min is rinsed, it is dry；
（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method
For：At 105-115 DEG C, 30-50s is polished using polishing fluid；
（4）Anodic oxidation：Aluminum alloy base material Jing Guo polishing treatment is put in the sulphuric acid electrolyte solution of a concentration of 15-20%, it will
High compression carbon plate is placed in electrolysis Sulfuric Acid Solution oxidation processes as cathode, obtains 10-20 μm of anode oxide film；
（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, substrate surface is enabled aluminum alloy to
Anode oxide film dissolving is formed, the porosity of oxidation film is made to increase；
（6）Dyeing is handled：It is coloured using nickel salt electrolytic colouring technology, 3-5min is impregnated before colouring, later at 20-30 DEG C
At a temperature of carry out coloring 6-10min；
（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.
Preferably, the step（1）In, when blasting treatment, spray gun is 20-30cm at a distance from aluminum alloy base material surface,
Feed speed is 1-2m/min.
Preferably, the step（2）In, the degreaser of use is the sodium hydroxide of 0.2-0.4mol/L, sodium phosphate, silicic acid
The temperature of sodium, sodium carbonate liquor, ungrease treatment is 50-70 DEG C, duration 30-50s.
Preferably, the step（3）In, it is 4 to polish liquid level phosphoric acid and sulfuric acid mass ratio:1 mixed polishing solution.
Preferably, in the step（3）Step later（4）Further include to the aluminum alloy base material surface after polishing treatment before
It starts the cleaning processing.
Preferably, the cleaning treatment includes：By aluminum alloy base material at 28-32 DEG C, in the nitric acid of a concentration of 8-14ml/L
Neutralisation treatment 10-20s in solution.
Preferably, the step（4）In, anodic oxidation condition：15-25 DEG C of sulphuric acid electrolyte solution temperature, current density are
0.8-1.2A/dm2, time 30-40min.
Preferably, the step（7）In, sealing of hole, and the concentration 3-5g/L of nickel acetate, sealing of hole are carried out using nickel acetate solution
Processing time 20-30min.
Compared with prior art, the present invention has following advantageous effect：
（1）The surface of aluminium alloy of the present invention first carries out sandblasting, degreasing, polishing treatment between carrying out anodic oxidation, can be closed in aluminium
The surface of gold forms uniform substrate, is convenient for follow-up anodic oxidation.
（2）The present invention can effectively remove the spot of aluminum alloy surface by ungrease treatment, remove aluminum alloy product surface
Natural oxide film and slight sassafras of drawing hinder, and the film layer of better quality is generated and obtained conducive to anodic oxidation oxidation film.
（3）The present invention forms one layer of fine and close oxidation film by anodic oxidation in aluminum alloy surface, and oxidation film generates speed
Degree is fast, and adhesion is good, excellent corrosion resistance, while Anodic oxidation treatment device is simple, and production cost is low.
（4）Activation process is carried out after anodic oxidation of the present invention, and the oxidation film of formation is activated, the hole of oxidation film is increased
Rate improves its adsorption capacity, is carried out convenient for follow-up dyeing.
（5）The present invention can be closed the fine pore of oxidation film layer by sealing of hole, to form fine and close oxidation film,
To improve the resistance to corrosion of aluminium alloy.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.These embodiments are merely to illustrate the present invention and do not have to
In limiting the scope of the invention.
Embodiment 1
A kind of aluminum alloy surface treatment process, includes the following steps：
（1）Blasting treatment：Blasting treatment is carried out to aluminum alloy base material surface, the pressure of the blasting treatment is 0.22Mpa, sand material
Grain size is 100-200 mesh；
（2）Ungrease treatment：Aluminum alloy base material is put into progress ungrease treatment 20min in alkaline degreaser, is taken out, is adopted and be rinsed with water
10min is dry；
（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method
For：At 105 DEG C, 30s is polished using polishing fluid；
（4）Anodic oxidation：Aluminum alloy base material Jing Guo polishing treatment is put in a concentration of 15% sulphuric acid electrolyte solution, it will be high
Compression carbon plate is placed in electrolysis Sulfuric Acid Solution oxidation processes as cathode, obtains 10 μm of anode oxide film；
（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, substrate surface is enabled aluminum alloy to
Anode oxide film dissolving is formed, the porosity of oxidation film is made to increase；
（6）Dyeing is handled：It is coloured using nickel salt electrolytic colouring technology, 3min is impregnated before colouring, later in 20 DEG C of temperature
Under carry out coloring 6min；
（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.
Wherein, the step（1）In, when blasting treatment, spray gun is 20cm, feeding speed at a distance from aluminum alloy base material surface
Degree is 1m/min.
Wherein, the step（2）In, the degreaser of use is the sodium hydroxide of 0.2mol/L, sodium phosphate, sodium metasilicate, carbon
The temperature of acid sodium solution, ungrease treatment is 50 DEG C, duration 30s.
Wherein, the step（3）In, it is 4 to polish liquid level phosphoric acid and sulfuric acid mass ratio:1 mixed polishing solution.
Wherein, in the step（3）Step later（4）Further include before to the aluminum alloy base material surface after polishing treatment into
Row cleaning treatment.
Wherein, the cleaning treatment includes：By aluminum alloy base material at 28 DEG C, in the salpeter solution of a concentration of 8ml/L in
With processing 10s.
Wherein, the step（4）In, anodic oxidation condition：15 DEG C of sulphuric acid electrolyte solution temperature, current density 0.8A/
Dm2, time 30min.
Wherein, the step（7）In, sealing of hole, and the concentration 3g/L of nickel acetate, sealing pores are carried out using nickel acetate solution
Time 20min.
Embodiment 2
A kind of aluminum alloy surface treatment process, includes the following steps：
（1）Blasting treatment：Blasting treatment is carried out to aluminum alloy base material surface, the pressure of the blasting treatment is 0.28Mpa, sand material
Grain size is 100-200 mesh；
（2）Ungrease treatment：Aluminum alloy base material is put into progress ungrease treatment 30min in alkaline degreaser, is taken out, is adopted and be rinsed with water
20min is dry；
（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method
For：At 115 DEG C, 50s is polished using polishing fluid；
（4）Anodic oxidation：Aluminum alloy base material Jing Guo polishing treatment is put in a concentration of 20% sulphuric acid electrolyte solution, it will be high
Compression carbon plate is placed in electrolysis Sulfuric Acid Solution oxidation processes as cathode, obtains 20 μm of anode oxide film；
（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, substrate surface is enabled aluminum alloy to
Anode oxide film dissolving is formed, the porosity of oxidation film is made to increase；
（6）Dyeing is handled：It is coloured using nickel salt electrolytic colouring technology, 5min is impregnated before colouring, later in 30 DEG C of temperature
Under carry out coloring 10min；
（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.
Wherein, the step（1）In, when blasting treatment, spray gun is 30cm, feeding speed at a distance from aluminum alloy base material surface
Degree is 2m/min.
Wherein, the step（2）In, the degreaser of use is the sodium hydroxide of 0.4mol/L, sodium phosphate, sodium metasilicate, carbon
The temperature of acid sodium solution, ungrease treatment is 70 DEG C, duration 50s.
Wherein, the step（3）In, it is 4 to polish liquid level phosphoric acid and sulfuric acid mass ratio:1 mixed polishing solution.
Wherein, in the step（3）Step later（4）Further include before to the aluminum alloy base material surface after polishing treatment into
Row cleaning treatment.
Wherein, the cleaning treatment includes：By aluminum alloy base material at 32 DEG C, in the salpeter solution of a concentration of 14ml/L in
With processing 20s.
Wherein, the step（4）In, anodic oxidation condition：25 DEG C of sulphuric acid electrolyte solution temperature, current density 1.2A/
Dm2, time 40min.
Wherein, the step（7）In, sealing of hole, and the concentration 5g/L of nickel acetate, sealing pores are carried out using nickel acetate solution
Time 30min.
Embodiment 3
A kind of aluminum alloy surface treatment process, includes the following steps：
（1）Blasting treatment：Blasting treatment is carried out to aluminum alloy base material surface, the pressure of the blasting treatment is 0.25Mpa, sand material
Grain size is 100-200 mesh；
（2）Ungrease treatment：Aluminum alloy base material is put into progress ungrease treatment 25min in alkaline degreaser, is taken out, is adopted and be rinsed with water
15min is dry；
（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method
For：At 110 DEG C, 40s is polished using polishing fluid；
（4）Anodic oxidation：Aluminum alloy base material Jing Guo polishing treatment is put in a concentration of 17% sulphuric acid electrolyte solution, it will be high
Compression carbon plate is placed in electrolysis Sulfuric Acid Solution oxidation processes as cathode, obtains 15 μm of anode oxide film；
（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, substrate surface is enabled aluminum alloy to
Anode oxide film dissolving is formed, the porosity of oxidation film is made to increase；
（6）Dyeing is handled：It is coloured using nickel salt electrolytic colouring technology, 4min is impregnated before colouring, later in 20-30 DEG C of temperature
Coloring 8min is carried out under degree；
（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.
Wherein, the step（1）In, when blasting treatment, spray gun is 25cm, feeding speed at a distance from aluminum alloy base material surface
Degree is 1.5m/min.
Wherein, the step（2）In, the degreaser of use is the sodium hydroxide of 0.3mol/L, sodium phosphate, sodium metasilicate, carbon
The temperature of acid sodium solution, ungrease treatment is 60 DEG C, duration 40s.
Wherein, the step（3）In, it is 4 to polish liquid level phosphoric acid and sulfuric acid mass ratio:1 mixed polishing solution.
Wherein, in the step（3）Step later（4）Further include before to the aluminum alloy base material surface after polishing treatment into
Row cleaning treatment.
Wherein, the cleaning treatment includes：By aluminum alloy base material at 30 DEG C, in the salpeter solution of a concentration of 11ml/L in
With processing 15s.
Wherein, the step（4）In, anodic oxidation condition：20 DEG C of sulphuric acid electrolyte solution temperature, current density 1A/
Dm2, time 35min.
Wherein, the step（7）In, sealing of hole, and the concentration 4g/L of nickel acetate, sealing pores are carried out using nickel acetate solution
Time 25min.
In conclusion the aluminum alloy surface treatment process of the present invention, can form fine and close protective layer, enable aluminum alloy to from
Chemical erosion and oxidation.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of aluminum alloy surface treatment process, which is characterized in that include the following steps：
（1）Blasting treatment：Blasting treatment is carried out to aluminum alloy base material surface, the pressure of the blasting treatment is 0.22-
0.28Mpa, sand material grain size are 100-200 mesh；
（2）Ungrease treatment：Aluminum alloy base material is put into progress ungrease treatment 20-30min in alkaline degreaser, is taken out, using water
10-20min is rinsed, it is dry；
（3）Polishing treatment：Aluminum alloy base material surface Jing Guo ungrease treatment is processed by shot blasting, the polishing treatment method
For：At 105-115 DEG C, 30-50s is polished using polishing fluid；
（4）Anodic oxidation：Aluminum alloy base material Jing Guo polishing treatment is put in the sulphuric acid electrolyte solution of a concentration of 15-20%, it will
High compression carbon plate is placed in electrolysis Sulfuric Acid Solution oxidation processes as cathode, obtains 10-20 μm of anode oxide film；
（5）Activation process：By the aluminum alloy base material after anodic oxidation by acid solution activation process, substrate surface is enabled aluminum alloy to
Anode oxide film dissolving is formed, the porosity of oxidation film is made to increase；
（6）Dyeing is handled：It is coloured using nickel salt electrolytic colouring technology, 3-5min is impregnated before colouring, later at 20-30 DEG C
At a temperature of carry out coloring 6-10min；
（7）Sealing pores：Dyeing treated aluminum alloy base material is subjected to sealing pores.
2. aluminum alloy surface treatment process according to claim 1, which is characterized in that the step（1）In, blasting treatment
When, spray gun is 20-30cm, feed speed 1-2m/min at a distance from aluminum alloy base material surface.
3. aluminum alloy surface treatment process according to claim 1, which is characterized in that the step（2）In, use takes off
Fat liquid is sodium hydroxide, sodium phosphate, sodium metasilicate, the sodium carbonate liquor of 0.2-0.4mol/L, and the temperature of ungrease treatment is 50-70
DEG C, duration 30-50s.
4. aluminum alloy surface treatment process according to claim 1, which is characterized in that the step（3）In, polish liquid level
Phosphoric acid and sulfuric acid mass ratio are 4:1 mixed polishing solution.
5. according to claim 1-4 any one of them aluminum alloy surface treatment process, which is characterized in that in the step（3）
Step later（4）Further include being started the cleaning processing to the aluminum alloy base material surface after polishing treatment before.
6. aluminum alloy surface treatment process according to claim 5, which is characterized in that the cleaning treatment includes：By aluminium
Alloy base material is at 28-32 DEG C, the neutralisation treatment 10-20s in the salpeter solution of a concentration of 8-14ml/L.
7. aluminum alloy surface treatment process according to claim 1, which is characterized in that the step（4）In, anodic oxidation
Condition：15-25 DEG C of sulphuric acid electrolyte solution temperature, current density 0.8-1.2A/dm2, time 30-40min.
8. aluminum alloy surface treatment process according to claim 1, which is characterized in that the step（7）In, using acetic acid
Nickel solution carries out sealing of hole, and the concentration 3-5g/L of nickel acetate, sealing pores time 20-30min.
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| CN201810378880.4A CN108441918A (en) | 2018-04-25 | 2018-04-25 | A kind of aluminum alloy surface treatment process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137040A (en) * | 2018-10-09 | 2019-01-04 | 佛山市海化表面处理科技有限公司 | A kind of aluminium alloy mantoquita electrolysis coloring processes and product |
| CN109267067A (en) * | 2018-11-22 | 2019-01-25 | 上海银木电器制造有限公司 | A kind of environmental-protecting chemical polishing fluid polished for aluminium and aluminium alloy high gloss |
| CN109385656A (en) * | 2018-10-09 | 2019-02-26 | 淮北市硕华机械设备有限公司 | A kind of aluminum alloy surface treatment process |
| CN110512256A (en) * | 2019-08-27 | 2019-11-29 | 福建省漳州安泰铝材有限公司 | A kind of preparation process of anticorrosive photovoltaic bracket |
| CN110656366A (en) * | 2018-06-29 | 2020-01-07 | 深圳市裕展精密科技有限公司 | Anodic oxidation method of aluminum alloy |
| CN111088511A (en) * | 2020-01-10 | 2020-05-01 | 董翠萍 | Aluminum profile oxidation coloring process |
| CN112210808A (en) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | Preparation method of black film |
| CN113122846A (en) * | 2021-04-03 | 2021-07-16 | 郑小宝 | Aluminum alloy metal plated part |
| CN113463011A (en) * | 2021-06-30 | 2021-10-01 | 东莞金稞电子科技有限公司 | Novel aluminum alloy and surface treatment process thereof |
| CN114941165A (en) * | 2022-05-26 | 2022-08-26 | 上海英汇科技发展有限公司 | Sand blasting and black anodic oxidation combined surface treatment process and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110656366A (en) * | 2018-06-29 | 2020-01-07 | 深圳市裕展精密科技有限公司 | Anodic oxidation method of aluminum alloy |
| CN109137040A (en) * | 2018-10-09 | 2019-01-04 | 佛山市海化表面处理科技有限公司 | A kind of aluminium alloy mantoquita electrolysis coloring processes and product |
| CN109385656A (en) * | 2018-10-09 | 2019-02-26 | 淮北市硕华机械设备有限公司 | A kind of aluminum alloy surface treatment process |
| CN109267067A (en) * | 2018-11-22 | 2019-01-25 | 上海银木电器制造有限公司 | A kind of environmental-protecting chemical polishing fluid polished for aluminium and aluminium alloy high gloss |
| CN110512256A (en) * | 2019-08-27 | 2019-11-29 | 福建省漳州安泰铝材有限公司 | A kind of preparation process of anticorrosive photovoltaic bracket |
| CN111088511A (en) * | 2020-01-10 | 2020-05-01 | 董翠萍 | Aluminum profile oxidation coloring process |
| 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 |
| CN113122846A (en) * | 2021-04-03 | 2021-07-16 | 郑小宝 | Aluminum alloy metal plated part |
| CN113463011A (en) * | 2021-06-30 | 2021-10-01 | 东莞金稞电子科技有限公司 | Novel aluminum alloy and surface treatment process thereof |
| CN114941165A (en) * | 2022-05-26 | 2022-08-26 | 上海英汇科技发展有限公司 | Sand blasting and black anodic oxidation combined surface treatment process and application thereof |
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