CN102732933A - Aluminum material anodization electrolytic coloring method for achieving multiple colors in one tank - Google Patents
Aluminum material anodization electrolytic coloring method for achieving multiple colors in one tank Download PDFInfo
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- CN102732933A CN102732933A CN2012100961067A CN201210096106A CN102732933A CN 102732933 A CN102732933 A CN 102732933A CN 2012100961067 A CN2012100961067 A CN 2012100961067A CN 201210096106 A CN201210096106 A CN 201210096106A CN 102732933 A CN102732933 A CN 102732933A
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Abstract
The invention discloses an aluminum material anodization electrolytic coloring method for achieving multiple colors in one tank. According to the invention, an aluminum material is first subjected to common processes such as de-oiling, surface cleaning, and polishing; the aluminum material is placed in a sulfuric acid electrolyte, wherein the aluminum material serves as an anode, and an inert material serves as a cathode; anodization is carried out through a current source or a voltage source; when anodization is carried out through a current source, in one time of anodization, a current density is decreased from high to low, and a ratio of the high current density to the low current density is 2-10:1, wherein in the one time of anodization, the high current density is higher than the low current density; a current maintenance time of the high density current is 8-300s, and the current maintenance time of the low density current is 20-1000s; electrolysis is repeated 30-300 times, and a total thickness of an alumina membrane is controlled at 6-60 micrometers, such that the colored aluminum material is prepared. With the method provided by the invention, the hue, lightness and purity of the aluminum material can be adjusted within a large range in a same tank liquid, and the whole process is green and environment-friendly.
Description
Technical field
The present invention relates to a kind of aluminium electrocolor process, particularly relate to the pleochroic aluminium electrolytic coloring of anodic oxidation of a kind of groove method, be implemented in the same tank liquor and can obtain versicolor aluminium.
Background technology
The metal aluminium is widely used in industry-by-industry, along with functional and ornamental have higher requirement of growth in the living standard people to aluminium.Anodic oxidation is a kind of effective aluminium process for treating surface, and aluminum anodized film electrolytic coloring technology can make the coloring film of aluminum or aluminum alloy product surface that solidity to corrosion is preferably arranged, wear resistance and photostabilization.Common electrolytic coloring technology is that aluminium is carried out anodic oxidation earlier, is containing Ni then; Co, Cu carries out electrolysis in the electrolytic solution of soluble metallic salts such as Sn; The electrolysis resultant of these metal-salts is precipitate in the anode oxide film of porous matter, realize the painted of aluminium.The conventional loaded down with trivial details and dull coloring of electrolytic colouring technology can not be prepared the aluminium of various colour systems in same tank liquor, it is bronze serial with aluminium alloy anode oxide film that the electrolytic colouring technology that proposes like CN 1016080B is used to obtain aluminium; The electrolytic colouring technology that CN 86101215B proposes is used to obtain aluminium and duraluminum is serial with red-purple; The selenium salt electrocolor process that CN 1059476C proposes is used to obtain a kind of golden yellow aluminium alloy.
Summary of the invention
The object of the present invention is to provide the pleochroic aluminium electrolytic coloring of anodic oxidation of a kind of groove method; Can realize to prepare the painted aluminium of various colour systems, paintedly when anodic oxidation, carry out simultaneously, need not add metals ion with same tank liquor; Technology is simple, with low cost and environmental protection.
For overcoming the deficiency of prior art, realize that the technical scheme that the object of the invention adopts is:
The pleochroic aluminium electrolytic coloring of anodic oxidation of a kind of groove method comprises the steps and processing condition:
(1) aluminium adopts ordinary method to deoil, surface cleaning, and polished finish;
(2) in sulfuric acid electrolyte, be anode with the aluminium, inert material is a negative electrode; Carry out anodic oxidation through current source or voltage source; When adopting the current source anodic oxidation; In an anodic oxidation, current density drops to low current density from HCD, and the ratio of HCD and low current density is 2～10: 1; In the anodic oxidation of homogeneous not, the HCD value is 0.1～2 A/dm
2One of them occurrence; The low current density value is 0.02～1 A/dm
2In an occurrence, in the anodic oxidation, HCD is higher than low current density; The electric current hold-time of HCD is 8～300 seconds, and the electric current hold-time of low current density is 20～1000 seconds;
When adopting the voltage source anodic oxidation, voltage changes to 4～12 volts of low voltages from 16～24 volts of high-voltages, and the ratio of high-voltage and low voltage is 1.5～4: 1; The high-voltage hold-time is 0～80 second, and the low voltage hold-time is 0～200 second, and the used time was 30～480 seconds when high-voltage dropped to low voltage, and the used time was 5～60 seconds when low voltage rose to high voltage; Said concentration of electrolyte is 10～200g/l, and electrolyte temperature is 0～21 ℃;
(3) repeating step is (2) 30～300 times, and controlled oxidation aluminium film total thickness is 6～60 microns, makes the aluminium after painted.
For further realizing the object of the invention, preferred alcohol or the acetone of using deoils in the step (1), carries out surface cleaning with dilute sulphuric acid or yellow soda ash, and carries out electrochemical etching.
Said inert material is preferably graphite.
Said aluminium is preferably 6063 or 6061 aluminium alloy extrusions, can also select commercial-purity aluminium for use.
The pellumina thickness that step (2) grows is preferably 120～300 nanometers.Current density and oxidization time when wherein the thickness of pellumina is by oxidation determine jointly.
The pellumina total thickness that after step (3) finishes, grows is 6～50 microns.The total thickness of pellumina is determined by the multiplicity in thickness in the step (2) and the step (3) jointly.
The present invention can obtain the aluminium of a plurality of colour systems in same tank liquor, the aluminium color is obtained optical modulation by the periodic nano-structure hole, and shows as color and can change along with the variation of viewer's viewing angle.When electrolyte temperature and concentration fixed, thickness and total oxidization time decision that the regulation and control of color form and aspect are obtained by step (2), the purity of color and lightness are determined by the multiplicity of step (3) and the voltage change in the step (2) jointly.
Have following advantage and beneficial effect with respect to prior art the present invention:
(1) the object of the present invention is to provide a kind of method can realize preparing the painted aluminium of various colour systems with same tank liquor.
(2) coloring process among the present invention carries out when alumilite process simultaneously, need not add metals ion, and technology is simple, with low cost and environmental protection.
Color form and aspect, purity and the lightness of the painted aluminium that (3) obtains among the present invention can be adjustable on a large scale, and the color of aluminium also can change with the variation of viewer's viewing angle.
Embodiment
Below in conjunction with embodiment the present invention is done further explanation, but protection scope of the present invention is not limited to the scope that embodiment representes.
Embodiment 1～4
The pleochroic aluminium electrolytic coloring of anodic oxidation of a kind of groove method, adopt the following steps preparation:
(1) select 6063 alloy aluminum to carry out anodic oxidation, adopt ordinary method to deoil, surface cleaning, and polishing waits processing.Wherein, use alcohol to deoil, carry out surface cleaning with dilute sulphuric acid, and carry out electrochemical etching.
(2) select current source to carry out anodic oxidation, electrolytic solution is sulfuric acid, concentration of electrolyte be C (g/L) and electrolyte temperature be T (℃).6063 alloy aluminum after in electrolytic solution, handling with step (1) are anode, and graphite is negative electrode, applies higher current density i
h(A/dm
2) hold-time t
h(s), drop to reduced-current current density i then
1(A/dm
2) hold-time t
1(s).Repeat above-mentioned steps P time.C, T, i among each embodiment
h, i
1, t
h, t
1, P value see table 1.Observe perpendicular to aluminium material surface, the color of the aluminium among each embodiment is seen table 1.
Need to prove; In an anodic oxidation, current density drops to low current density from HCD, and the ratio of HCD and low current density is 2～10: concrete ratio in 1; In the anodic oxidation of homogeneous not, but the HCD value is 0.1～2A/dm
2One of them occurrence (seeing table 1); The low current density value is 0.02～1A/dm
2In an occurrence (seeing table 1); But in an anodic oxidation; HCD is higher than low current density; HCD be in an anodic oxidation for low current density, in homogeneous anodic oxidation not, certain anodised HCD once possibly be lower than the low current density of another time; The electric current hold-time of HCD is 8～300 seconds, and the electric current hold-time of low current density is 20～1000 seconds.
Table 1
Embodiment 5～8
The pleochroic aluminium electrolytic coloring of anodic oxidation of a kind of groove method, adopt the following steps preparation:
(1) select 6061 alloy aluminiums to carry out anodic oxidation, adopt ordinary method to deoil, surface cleaning, and polishing waits processing.Use acetone deoils, and carries out surface cleaning with yellow soda ash, and carries out electrochemical etching.
(2) carry out anodic oxidation through voltage source, electrolytic solution is sulfuric acid, concentration of electrolyte be C (g/L) and electrolyte temperature be T (℃).In electrolytic solution, be anode, apply high voltage U with the aluminium
h(v) hold-time t
h(s), at t
1(s) drop to low voltage U within time
1(v), and hold-time t
1(s), then at t
2(s) rise to high voltage U within time
h(v).Repeat above-mentioned steps P time.C, T, U among each embodiment
h, U
1, t
h, t
1, t
1, t
2, P value see table 2.Observe perpendicular to aluminium material surface, the color of the aluminium among each embodiment is seen table 2.
Table 2
Method of the present invention has formed on the aluminium surface has periodic multi-layer nano pipeline branched structure; Can regulate distance and the specific refractory power of anodised aluminium between the lateral through regulating anodic oxidation condition; Thereby visible light is produced selective reflection; Cause the aluminium surface to produce color, therefore change anodic oxidation condition can be prepared various colour systems in same tank liquor painted aluminium.Coloring process among the present invention carries out when alumilite process simultaneously, need not add metals ion, and technology is simple, with low cost and environmental protection.Color form and aspect, purity and the lightness of the painted aluminium that obtains among the present invention can be adjustable on a large scale, and the color of aluminium also can change with the variation of viewer's viewing angle.
Claims (5)
1. the pleochroic aluminium electrolytic coloring of anodic oxidation of groove method is characterized in that comprising the steps and processing condition:
(1) aluminium adopts ordinary method to deoil, surface cleaning, and polished finish;
(2) in sulfuric acid electrolyte, be anode with the aluminium, inert material is a negative electrode; Carry out anodic oxidation through current source or voltage source; When adopting the current source anodic oxidation; In an anodic oxidation, current density drops to low current density from HCD, and the ratio of HCD and low current density is 2～10: 1; In the anodic oxidation of homogeneous not, the HCD value is 0.1～2A/dm
2One of them occurrence; The low current density value is 0.02～1A/dm
2In an occurrence, in the anodic oxidation, HCD is higher than low current density; The electric current hold-time of HCD is 8～300 seconds, and the electric current hold-time of low current density is 20～1000 seconds;
When adopting the voltage source anodic oxidation, voltage changes to 4～12 volts of low voltages from 16～24 volts of high-voltages, and the ratio of high-voltage and low voltage is 1.5～4: 1; The high-voltage hold-time is 0～80 second, and the low voltage hold-time is 0～200 second, and the used time was 30～480 seconds when high-voltage dropped to low voltage, and the used time was 5～60 seconds when low voltage rose to high voltage; Said concentration of electrolyte is 10～200g/l, and electrolyte temperature is 0～21 ℃;
(3) repeating step is (2) 30～300 times, and controlled oxidation aluminium film total thickness is 6～60 microns, makes the aluminium after painted.
2. according to the pleochroic aluminium electrolytic coloring of anodic oxidation of the said groove of claim 1 method, it is characterized in that: use alcohol or acetone to deoil in the step (1), carry out surface cleaning with dilute sulphuric acid or yellow soda ash, and carry out electrochemical etching.
3. according to the pleochroic aluminium electrolytic coloring of anodic oxidation of the said groove of claim 1 method, it is characterized in that: said inert material is a graphite.
4. according to the pleochroic aluminium electrolytic coloring of anodic oxidation of the said groove of claim 1 method, it is characterized in that: said aluminium is 6063 or 6061 aluminium alloy extrusions.
5. according to the pleochroic aluminium electrolytic coloring of anodic oxidation of the said groove of claim 1 method, it is characterized in that: the pellumina thickness that step (2) grows is 120～300 nanometers.
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Cited By (7)
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| CN107881455A (en) * | 2017-11-28 | 2018-04-06 | 安徽东耀建材有限公司 | A kind of surface modifying method of Aluminum plastics door and window |
| CN108660496A (en) * | 2018-05-02 | 2018-10-16 | 珠海市美图金属科技有限公司 | A kind of proximate matter heat tinting process |
| CN108707945A (en) * | 2018-05-25 | 2018-10-26 | 深圳市哈波智能科技有限公司 | A kind of aluminium flake secondary oxidation manufacturing process that surface print is color |
| CN109208055A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | A kind of aluminium alloy and preparation method thereof and handset shell |
| CN111020663A (en) * | 2019-12-10 | 2020-04-17 | 河南裕展精密科技有限公司 | Method for producing oxide film, and metal product having oxide film |
| CN112174112A (en) * | 2020-11-08 | 2021-01-05 | 赵伟 | Preparation method of nano rod-shaped carbon material |
| CN115094497A (en) * | 2022-06-21 | 2022-09-23 | 重庆大学 | Metal-based photo-thermal component and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208055A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | A kind of aluminium alloy and preparation method thereof and handset shell |
| CN107881455A (en) * | 2017-11-28 | 2018-04-06 | 安徽东耀建材有限公司 | A kind of surface modifying method of Aluminum plastics door and window |
| CN108660496A (en) * | 2018-05-02 | 2018-10-16 | 珠海市美图金属科技有限公司 | A kind of proximate matter heat tinting process |
| CN108660496B (en) * | 2018-05-02 | 2019-12-03 | 珠海市美图金属科技有限公司 | A kind of profile heat tinting process |
| CN108707945A (en) * | 2018-05-25 | 2018-10-26 | 深圳市哈波智能科技有限公司 | A kind of aluminium flake secondary oxidation manufacturing process that surface print is color |
| CN111020663A (en) * | 2019-12-10 | 2020-04-17 | 河南裕展精密科技有限公司 | Method for producing oxide film, and metal product having oxide film |
| CN112174112A (en) * | 2020-11-08 | 2021-01-05 | 赵伟 | Preparation method of nano rod-shaped carbon material |
| CN112174112B (en) * | 2020-11-08 | 2023-11-03 | 赵伟 | Preparation method of nano rod-shaped carbon material |
| CN115094497A (en) * | 2022-06-21 | 2022-09-23 | 重庆大学 | Metal-based photo-thermal component and preparation method thereof |
| CN115094497B (en) * | 2022-06-21 | 2023-09-08 | 重庆大学 | Metal-based photo-thermal component and preparation method thereof |
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Application publication date: 20121017 |