CN106222720A - A kind of anodised processing method of aluminum component - Google Patents
A kind of anodised processing method of aluminum component Download PDFInfo
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- CN106222720A CN106222720A CN201610589643.3A CN201610589643A CN106222720A CN 106222720 A CN106222720 A CN 106222720A CN 201610589643 A CN201610589643 A CN 201610589643A CN 106222720 A CN106222720 A CN 106222720A
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- aqueous solution
- aluminum component
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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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- 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
Abstract
The invention discloses a kind of anodised processing method of aluminum component, comprise the steps: S1, take pretreated aluminum component, add in the electrolyte that temperature is 19 21 DEG C, carry out constant current density anodic oxidation and obtain material A, wherein, in anode oxidation process, electric current density is 130 150A/m2, anodizing time is 20 40min；S2, adding in pore-sealing liquid by material A, adjust the temperature to 20 30 DEG C, soak Tmin, take out the solidification of the material A after soaking and obtain being covered with the aluminum component of pellumina, wherein, T=1.1 1.3 × d, d are the thickness of pellumina, and unit is μm.What the present invention obtained is covered with the aluminum component excellent adsorption to dyestuff of pellumina, will not turn black after boiling in aqueous dye solutions, beneficially the dyeing of aluminium and use.
Description
Technical field
The present invention relates to anodizing technology field, particularly relate to a kind of anodised processing method of aluminum component.
Background technology
Metal material is in electrolyte solution, and a kind of material making its surface form oxide-film by executing outward anode current is protected
The technology of protecting is referred to as anodic oxidation.Metal material or goods after anodization, its corrosion resistance, hardness, wearability, insulation
Property, thermostability etc. are all improved largely.The metal material implementing anodization most is aluminum.Anodizing of aluminium typically exists
Carrying out in acidic electrolysis bath, with aluminum as anode, in electrolytic process, the anion of oxygen produces oxide-film, this film with aluminum effect
Just the finest and closely woven during formation, though there being certain resistance, but the negative oxygen ion in electrolyte remains to arrival aluminum surface and continuously forms oxidation
Film, along with film thickness increases, resistance becomes big, and Faradaic current diminishes, and at this moment the outer oxide film with electrolyte contacts occurs chemistry
Dissolving, when aluminum surface forms the speed of oxide gradually with the velocity balance of chemolysis, this oxide-film just can reach this
Maximum gauge under one electrolytic parameter.Improve the corrosion resistance of product, increase service life.At present, covering after anodic oxidation
There is the aluminium of pellumina when dyeing, be difficult to absorbing dye, and after boiling a period of time in aqueous dye solutions, aluminium material surface
Easily blackening, can affect use attractive in appearance and aluminium.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes a kind of anodised processing method of aluminum component, this
The aluminum component excellent adsorption to dyestuff being covered with pellumina that invention obtains, will not turn black after boiling, have in aqueous dye solutions
It is beneficial to dyeing and the use of aluminium.
The anodised processing method of a kind of aluminum component that the present invention proposes, comprises the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 19-21 DEG C, carry out constant current density anodic oxygen
Changing and obtain material A, wherein, in anode oxidation process, electric current density is 130-150A/m2, anodizing time is 20-
40min；
S2, material A is added in pore-sealing liquid, adjust the temperature to 20-30 DEG C, soak Tmin, take out the material A after soaking solid
Changing and obtain being covered with the aluminum component of pellumina, wherein, T=1.1-1.3 × d, d are the thickness of pellumina, and unit is μm.
Preferably, in S1, pretreatment comprises the steps: defat, alkaline etching, neutralization.
Preferably, in S1, in preprocessing process, aluminum component is added in acid degreasing agent aqueous solution, soak, washing, so
In rear addition the first alkaline aqueous solution, soak, add in the second alkaline aqueous solution, soak, washing, it is subsequently added into HNO3Water-soluble
In liquid, soaking, washing obtains pretreated aluminum, wherein, the first alkaline aqueous solution be concentration be 40-50g/l sodium hydroxide water
Solution, the second alkaline aqueous solution be concentration be 45-60g/l sodium hydrate aqueous solution.
Preferably, in S1, in preprocessing process, it is that 2-3wt% acid degreasing agent is water-soluble that aluminum component adds mass fraction
In liquid, soak 1-3min, washing, be subsequently adding in the first alkaline aqueous solution that temperature is 40-45 DEG C, soak 1-3min, then add
Entering in the second alkaline aqueous solution that temperature is 45-55 DEG C, soak 10-30min, washing, being subsequently added into concentration is 120-150g/
lHNO3In aqueous solution, soaking 2-5min, washing obtains pretreated aluminum, wherein, the first alkaline aqueous solution be concentration be 40-
50g/l sodium hydrate aqueous solution, the second alkaline aqueous solution be concentration be 45-60g/l sodium hydrate aqueous solution.
Preferably, in S1, H in electrolyte2SO4Concentration be 150-180g/l, Al3+Concentration be 5-15g/l, Cl-Dense
Degree≤15mg/L, the concentration≤50mg/L of mineral, the solute of electrolyte is water.
Preferably, in S2, material A needs after washing, adds in pore-sealing liquid.
Preferably, in S2, Ni in pore-sealing liquid2+Concentration be 0.8-1.2g/l, F-Concentration be 0.35-0.6g/l, sealing of hole
The pH of liquid is 5.6-6.5.
Preferably, in S2, in the curing process, solidification temperature is 180-200 DEG C, and hardening time is 30-45min.
Aluminum oxide film thickness on the above-mentioned aluminum component being covered with pellumina is pre-specified before preparing, and preparation terminates
After also need to detect gained aluminum oxide film thickness again.
Above-mentioned water is deionized water.
In above-mentioned S1, in preprocessing process, acid degreasing agent can be buied from the market.
The present invention, by the temperature of electrolyte during control anodic oxidation, coordinates suitable electric current density and anodizing time
Make pellumina closely be attached to aluminium workpiece surface, and add the decay resistance of pellumina, it is to avoid temperature too high or
Too low cause pellumina the most ablated and turn white, the problem that film layer is loose；By controlling H in electrolyte2SO4Concentration, it is ensured that
Anodic oxidation is smoothed out, and coordinates Al in control electrolyte3+、Cl-Concentration with mineral, it is ensured that generate when anodic oxidation
Pellumina complete, be difficult to be destroyed, corrosion resistant while, there is good adsorptivity；And pass through sealing of hole and solidify into one
Step increases the integrity of pellumina, corrosion resistance and easy adsorptivity；Suitably sealing of hole time, sealing of hole temperature and pore-sealing liquid can enter
One step increases the integrity of oxide-film, corrosion resistance and easy adsorptivity；What the present invention obtained is covered with the aluminum component of pellumina in dye
Will not turn black after material aqueous solution boils, good to dye adsorption property.
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
A kind of anodised processing method of aluminum component, comprises the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 20 DEG C, carry out constant current density anodic oxidation and obtain
To material A, wherein, in anode oxidation process, electric current density is 140A/m2, anodizing time is 30min；
S2, material A is added in pore-sealing liquid, adjust the temperature to 25 DEG C, soak Tmin, take out the material A solidification after soaking
Obtain being covered with the aluminum component of pellumina, wherein, T=1.2 × d, d be the thickness of pellumina be 3 μm.
Embodiment 2
A kind of anodised processing method of aluminum component, comprises the steps:
S1, take aluminum component defat, alkaline etching, neutralization after, adding temperature is in the electrolyte of 19 DEG C, carries out constant current density anode
Oxidation obtains material A, and wherein, in anode oxidation process, electric current density is 150A/m2, anodizing time is 20min, electricity
Solve H in liquid2SO4Concentration be 180g/l, Al3+Concentration be 5g/l, Cl-Concentration≤15mg/L, the concentration of mineral≤
50mg/L, the solute of electrolyte is water；
S2, material A is washed after add in pore-sealing liquid, adjust the temperature to 30 DEG C, soak Tmin, take out the material after soaking
A, is warming up to 180 DEG C, and insulation 45min obtains being covered with the aluminum component of pellumina, and wherein, T=1.1 × d, d are the thickness of pellumina
Degree is 4 μm, Ni in pore-sealing liquid2+Concentration be 0.8g/l, F-Concentration be 0.6g/l, the pH of pore-sealing liquid be 5.6.
Embodiment 3
A kind of anodised processing method of aluminum component, comprises the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 21 DEG C, carry out constant current density anodic oxidation and obtain
To material A, wherein, in anode oxidation process, electric current density is 130A/m2, anodizing time is 40min, in electrolyte
H2SO4Concentration be 150g/l, Al3+Concentration be 15g/l, Cl-Concentration≤15mg/L, the concentration≤50mg/L of mineral, electricity
The solute solving liquid is water；
In preprocessing process, it is in 2wt% acid degreasing agent aqueous solution that aluminum component adds mass fraction, soaks 3min,
Washing, is subsequently adding in the first alkaline aqueous solution that temperature is 40 DEG C, soaks 3min, adds the second alkalescence that temperature is 45 DEG C
In aqueous solution, soaking 30min, washing, being subsequently added into concentration is 120g/lHNO3In aqueous solution, soaking 5min, washing obtains pre-
Aluminum after process, wherein, the first alkaline aqueous solution be concentration be 40g/l sodium hydrate aqueous solution, the second alkaline aqueous solution is dense
Degree is 60g/l sodium hydrate aqueous solution；
S2, material A is washed after add in pore-sealing liquid, adjust the temperature to 20 DEG C, soak Tmin, take out the material after soaking
A, is warming up to 200 DEG C, and insulation 30min obtains being covered with the aluminum component of pellumina, and wherein, T=1.3 × d, d are the thickness of pellumina
Degree is 2 μm, Ni in pore-sealing liquid2+Concentration be 1.2g/l, F-Concentration be 0.35g/l, the pH of pore-sealing liquid be 6.5.
Embodiment 4
A kind of anodised processing method of aluminum component, comprises the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 19.5 DEG C, carry out constant current density anodic oxidation
Obtaining material A, wherein, in anode oxidation process, electric current density is 145A/m2, anodizing time is 25min, electrolyte
Middle H2SO4Concentration be 170g/l, Al3+Concentration be 8g/l, Cl-Concentration≤15mg/L, the concentration≤50mg/L of mineral,
The solute of electrolyte is water；
In preprocessing process, it is in 3wt% acid degreasing agent aqueous solution that aluminum component adds mass fraction, soaks 1min,
Washing, is subsequently adding in the first alkaline aqueous solution that temperature is 45 DEG C, soaks 1min, adds the second alkalescence that temperature is 55 DEG C
In aqueous solution, soaking 10min, washing, being subsequently added into concentration is 150g/lHNO3In aqueous solution, soaking 2min, washing obtains pre-
Aluminum after process, wherein, the first alkaline aqueous solution be concentration be 50g/l sodium hydrate aqueous solution, the second alkaline aqueous solution is dense
Degree is 45g/l sodium hydrate aqueous solution；
S2, material A is washed after add in pore-sealing liquid, adjust the temperature to 27 DEG C, soak Tmin, take out the material after soaking
A, is warming up to 185 DEG C, and insulation 40min obtains being covered with the aluminum component of pellumina, and wherein, T=1.2 × d, d are the thickness of pellumina
Degree is 3.5 μm, Ni in pore-sealing liquid2+Concentration be 0.9g/l, F-Concentration be 0.5g/l, the pH of pore-sealing liquid be 5.8.
Embodiment 5
A kind of anodised processing method of aluminum component, comprises the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 20.5 DEG C, carry out constant current density anodic oxidation
Obtaining material A, wherein, in anode oxidation process, electric current density is 135A/m2, anodizing time is 35min, electrolyte
Middle H2SO4Concentration be 160g/l, Al3+Concentration be 12g/l, Cl-Concentration≤15mg/L, the concentration≤50mg/L of mineral,
The solute of electrolyte is water；
In preprocessing process, it is in 2.5wt% acid degreasing agent aqueous solution that aluminum component adds mass fraction, soaks
2min, washing, it is subsequently adding in the first alkaline aqueous solution that temperature is 43 DEG C, soaks 2min, add that temperature is 50 DEG C the
In two alkaline aqueous solutions, soaking 20min, washing, being subsequently added into concentration is 135g/lHNO3In aqueous solution, soak 3.5min, water
Wash and obtain pretreated aluminum, wherein, the first alkaline aqueous solution be concentration be 45g/l sodium hydrate aqueous solution, the second alkaline water
Solution be concentration be 52g/l sodium hydrate aqueous solution；
S2, material A is washed after add in pore-sealing liquid, adjust the temperature to 23 DEG C, soak Tmin, take out the material after soaking
A, is warming up to 195 DEG C, and insulation 35min obtains being covered with the aluminum component of pellumina, and wherein, T=1.2 × d, d are the thickness of pellumina
Degree is 2.5 μm, Ni in pore-sealing liquid2+Concentration be 1.1g/l, F-Concentration be 0.45g/l, the pH of pore-sealing liquid be 6.2.
Example 1-5, adds and boils 20min in aqueous dye solutions, take out and observe aluminium workpiece surface situation, and cover with commercially available
The aluminum component having pellumina is matched group, and result is as follows:
| Group | Surface condition |
| Embodiment 1 | Do not turn black, color even, come off without dyestuff |
| Embodiment 2 | Do not turn black, color even, come off without dyestuff |
| Embodiment 3 | Do not turn black, color even, come off without dyestuff |
| Embodiment 4 | Do not turn black, color even, come off without dyestuff |
| Embodiment 5 | Do not turn black, color even, come off without dyestuff |
| Matched group | Blackout, uneven color, dyestuff have and come off |
As can be seen from the above table, what the present invention obtained is covered with the aluminum component excellent adsorption to dyestuff of pellumina, at dyestuff
Will not turn black after boiling in aqueous solution, dyestuff is uniformly distributed on the aluminum component be covered with pellumina.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (8)
1. the anodised processing method of aluminum component, it is characterised in that comprise the steps:
S1, take pretreated aluminum component, add in the electrolyte that temperature is 19-21 DEG C, carry out constant current density anodic oxidation and obtain
To material A, wherein, in anode oxidation process, electric current density is 130-150A/m2, anodizing time is 20-40min；
S2, material A is added in pore-sealing liquid, adjust the temperature to 20-30 DEG C, soak Tmin, take out the material A after soaking and solidify
To being covered with the aluminum component of pellumina, wherein, T=1.1-1.3 × d, d are the thickness of pellumina, and unit is μm.
The anodised processing method of aluminum component the most according to claim 1, it is characterised in that in S1, pretreatment includes as follows
Step: defat, alkaline etching, neutralization.
The anodised processing method of aluminum component the most according to claim 1 or claim 2, it is characterised in that in S1, at preprocessing process
In, aluminum component is added in acid degreasing agent aqueous solution, soak, washing, it is subsequently adding in the first alkaline aqueous solution, soaks, then add
Enter in the second alkaline aqueous solution, soak, washing, it is subsequently added into HNO3In aqueous solution, soaking, washing obtains pretreated aluminum,
Wherein, the first alkaline aqueous solution be concentration be 40-50g/l sodium hydrate aqueous solution, the second alkaline aqueous solution be concentration be 45-
60g/l sodium hydrate aqueous solution.
4. according to the anodised processing method of aluminum component described in any one of claim 1-3, it is characterised in that in S1, at pre-place
During reason, it is in 2-3wt% acid degreasing agent aqueous solution that aluminum component adds mass fraction, soaks 1-3min, washing, then adds
Enter in the first alkaline aqueous solution that temperature is 40-45 DEG C, soak 1-3min, add the second alkaline water that temperature is 45-55 DEG C
In solution, soaking 10-30min, washing, being subsequently added into concentration is 120-150g/lHNO3In aqueous solution, soak 2-5min, washing
Obtain pretreated aluminum, wherein, wherein, the first alkaline aqueous solution be concentration be 40-50g/l sodium hydrate aqueous solution, second
Alkaline aqueous solution be concentration be 45-60g/l sodium hydrate aqueous solution.
5. according to the anodised processing method of aluminum component described in any one of claim 1-4, it is characterised in that in S1, electrolyte
Middle H2SO4Concentration be 150-180g/l, Al3+Concentration be 5-15g/l, Cl-Concentration≤15mg/L, the concentration of mineral≤
50mg/L, the solute of electrolyte is water.
6., according to the anodised processing method of aluminum component described in any one of claim 1-5, it is characterised in that in S2, material A needs
After washing, add in pore-sealing liquid.
7. according to the anodised processing method of aluminum component described in any one of claim 1-6, it is characterised in that in S2, pore-sealing liquid
Middle Ni2+Concentration be 0.8-1.2g/l, F-Concentration be 0.35-0.6g/l, the pH of pore-sealing liquid be 5.6-6.5.
8. according to the anodised processing method of aluminum component described in any one of claim 1-7, it is characterised in that in S2, in solidification
During, solidification temperature is 180-200 DEG C, and hardening time is 30-45min.
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| CN201610589643.3A CN106222720A (en) | 2016-07-25 | 2016-07-25 | A kind of anodised processing method of aluminum component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108018590A (en) * | 2018-03-19 | 2018-05-11 | 福建奋安铝业有限公司 | A kind of aluminium shape surface treatment process |
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| CN101492782A (en) * | 2008-04-02 | 2009-07-29 | 何旭坤 | Novel aluminum alloy and heat tinting process for the aluminum alloy product |
| CN102747401B (en) * | 2012-07-05 | 2015-07-15 | 惠州Tcl移动通信有限公司 | Processing method for aluminum components |
| CN105696050A (en) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | Coloring process for rough-surface section bar |
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2016
- 2016-07-25 CN CN201610589643.3A patent/CN106222720A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492782A (en) * | 2008-04-02 | 2009-07-29 | 何旭坤 | Novel aluminum alloy and heat tinting process for the aluminum alloy product |
| CN102747401B (en) * | 2012-07-05 | 2015-07-15 | 惠州Tcl移动通信有限公司 | Processing method for aluminum components |
| CN105696050A (en) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | Coloring process for rough-surface section bar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108018590A (en) * | 2018-03-19 | 2018-05-11 | 福建奋安铝业有限公司 | A kind of aluminium shape surface treatment process |
| CN108018590B (en) * | 2018-03-19 | 2019-06-25 | 福建奋安铝业有限公司 | A kind of aluminium shape surface treatment process |
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