CN103194779A - Coloring solution formula, coloring solution preparation method and application - Google Patents
Coloring solution formula, coloring solution preparation method and application Download PDFInfo
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- CN103194779A CN103194779A CN2013101236977A CN201310123697A CN103194779A CN 103194779 A CN103194779 A CN 103194779A CN 2013101236977 A CN2013101236977 A CN 2013101236977A CN 201310123697 A CN201310123697 A CN 201310123697A CN 103194779 A CN103194779 A CN 103194779A
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Abstract
The invention relates to a coloring solution formula, a coloring solution preparation method and application. The coloring solution prepared by the coloring solution formula can be directly used for chemically coloring the aluminum anodic oxide film of the aluminum matrix, and the coloring solution formula comprises: potassium dichromate (KCr)2O7) 90-125 g/L of sodium carbonate (Na)2CO3) 15-20 g/L. The purities of the potassium dichromate and the sodium carbonate are analytically pure, and deionized water is adopted for preparing the coloring solution. The invention has the advantages that: the formed coloring solution can be directly chemically colored on the aluminum anodic oxide film to form a green compact anodic oxide film on the surface of an aluminum piece, namely an aluminum substrate, so that on one hand, the wear resistance and corrosion resistance of the metal surface of the aluminum piece are improved, and the aluminum piece has high insulation resistance and breakdown voltage and can be widely applied to electronics and related industries; on the other hand, the appearance of the aluminum piece is improved after the aluminum piece is colored green. The invention also relates to a method for preparing the coloring solution according to the coloring solution formula and application thereof.
Description
Technical field
The present invention relates to field of metal surface treatment technology, relate in particular to a kind of can be directly chemical stain is used on aluminum anodized film coloring solution prescription, coloring solution preparation method and application.
Background technology
Alumite has very high hardness, can improve the wear resistance of metallic surface; Alumite is very stable in atmosphere, therefore has solidity to corrosion preferably; Alumite has very high insulation resistance and voltage breakdown, can be as the dielectric layer of electrolytic condenser or the insulation layer of electrical apparatus product; Alumite is a kind of good thermal insulation layer; Therefore and be widely used in electronics and the relevant industries.
Aluminium and alloy thereof have generated one deck porous oxide film on its surface after anodic oxidation treatment, behind painted and sealing treatment, can obtain various color, and can improve solidity to corrosion, the wear resistance of rete.After anodic oxidation on the aluminum substrate is by chemical stain-green, make aluminum component inherit all advantages of above-mentioned alumite on the one hand, on the other hand, compare with traditional coloring process, simple in line with the preparation of look solution, cost is low, operation is simple, simultaneously go up greenly, bright-colored, increased aesthetic measure and the range of application of aluminum component.
Summary of the invention
In view of this, be necessary to provide a kind of coloring solution prescription, coloring solution preparation method and application, the coloring solution of its formation can directly chemical stain on aluminum anodized film, is the dense anodic oxide film that the surface of aluminum substrate forms one deck green at aluminum component.
The present invention is achieved in that a kind of coloring solution prescription, the directly chemical stain on the aluminum anodized film of aluminum substrate of the coloring solution of its preparation, and this coloring solution prescription comprises: potassium bichromate (KCr
2O
7) 90 ~ 125g/L, yellow soda ash (Na
2CO
3) purity of this potassium bichromate of 15 ~ 20g/L, this yellow soda ash is analytical pure, deionized water is adopted in this coloring solution preparation.
The present invention also provides a kind of coloring solution preparation method, it is for the preparation of going out the directly coloring solution of chemical stain on the aluminum anodized film of aluminum substrate, it adopts above-mentioned coloring solution formulation, this coloring solution is the preparation method may further comprise the steps: take by weighing this potassium bichromate by the formula ratio by this coloring solution prescription, this yellow soda ash, pour earlier the deionized water of 1/3 container volume specification in the vessel into, aluminum substrate is carried out in the selection of container volume specification can be immersed in the interior principle of container fully, these vessel are put into the heating in water bath groove be heated to 80 ℃, successively with this potassium bichromate, this yellow soda ash is poured fully dissolving in these vessel into, the deionized water that adds residual volume again forms directly this coloring solution of chemical stain on aluminum anodized film.
The present invention also provides a kind of coloring solution to use, the directly chemical stain application on the aluminum anodized film of aluminum substrate of its coloring solution of making for above-mentioned coloring solution preparation method.
As the further improvement of such scheme, the applying step that described coloring solution is used is as follows:
A, aluminum substrate is fully deoiled;
B, this aluminum substrate is carried out alkali cleaning, it is that 40 ~ 60 ℃ of content are 10% sodium hydroxide solution 10 ~ 20 seconds that this aluminum substrate is put into temperature, in the deionized water that flows, cleaned 10 ~ 30 seconds, in the deionized water that flows, cleaned 10 ~ 30 seconds again, go to next step;
C, this aluminum substrate is carried out pickling, in nitric acid and water volume ratio are the solution of 1:3, carry out pickling 10 ~ 20s, in the pure water that flows, cleaned 10 ~ 30 seconds, go to next step;
D, this aluminum substrate is put into anodic oxidation solution carry out anodic oxidation treatment, prepare this anodic oxidation solution: H by following composition and proportioning
2SO
4180～200g/L adds two stainless steel plates connection power cathodes and puts into this anodic oxidation solution during operation, this aluminum substrate is connected positive source put into this anodic oxidation solution; Operation electrolysis voltage: 8～12V; Actuating current density: 0.5～0.8A/dm
2The thickness of oxide film is relevant with operation electrolysis voltage, current density and time, and according to above parameter operation, the sedimentation velocity of the oxide film that deposits on this aluminum substrate is: 3 ~ 4um/hour; In the pure water that flows, cleaned 10 ~ 30 seconds behind the EO, go to next step;
E, the aluminum substrate behind the deposited oxide film is put into temperature is 80 ℃ coloring solution, soak time 8 ~ 20 minutes, and the length of time has determined the shade that aluminum substrate is painted; Behind the EO, aluminum substrate was cleaned 45 ~ 60 seconds in the pure water that flows, go to next step;
F, dry after in dehydrated alcohol, aluminum substrate being dewatered 2～5 seconds.
As the further improvement of such scheme, aluminum substrate is fully deoiled, be divided into the processing of two steps:
At first, organic deoiling, it is 40 ~ 60 ℃ acetone soln that aluminum substrate is put into temperature, soaks 15 ~ 20 minutes;
Secondly, chemical deoiling and degreasing is put into chemical deoiling and degreasing solution with the aluminum substrate after the immersion treatment, and ultrasonic immersion 15 ~ 20 minutes was soaked the aluminum substrate after the immersion treatment 0.5 ~ 1 minute in hot water, go to next step.
Preferably, the proportioning of described chemical deoiling and degreasing solution is: yellow soda ash (Na
2CO
3) 20 g/l, sodium phosphate (Na
3PO
4) 20 g/l, emulsifying agent (OP-10) 3 g/l.
As the further improvement of such scheme, in step D, in dehydrated alcohol, aluminum substrate was dewatered 2～5 seconds, put into baking oven after with nitrogen aluminum substrate being dried up, dry 10 ~ 20min under 80～100 ℃ of conditions.
The invention has the advantages that: the coloring solution of its formation can directly chemical stain on aluminum anodized film, is the dense anodic oxide film that the surface of aluminum substrate forms one deck green at aluminum component, has improved wear resistance, the solidity to corrosion of aluminum component metallic surface on the one hand; Have very high insulation resistance and voltage breakdown, can be widely used in electronics and relevant industries; On the other hand, green after, increased the aesthetic measure of aluminum component.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
[embodiment 1]
The preparation coloring solution: the formula ratio according to the look solution formula takes by weighing potassium bichromate, yellow soda ash, pour earlier the deionized water of 1/3 volume in the vessel into, vessel are put into the heating in water bath groove be heated to 80 ℃, successively potassium bichromate, yellow soda ash are poured into fully dissolving in the vessel, added the deionized water of residual volume again.The coloring solution composition and the content that are mixed with are: potassium bichromate (KCr2O7) 100g/L, yellow soda ash (Na
2CO
3) 18g/L.
Preparation chemical deoiling and degreasing solution, prescription weighing sodium carbonate, sodium phosphate, emulsifier op-10 according to chemical deoiling and degreasing solution, be mixed with solution and be cooled to room temperature, the chemical deoiling and degreasing solution composition and the content that are mixed with are: yellow soda ash 20g/L, sodium phosphate 20g/L, emulsifying agent (OP-10) 3g/L.
Preparation anodic oxidation solution: measure sulfuric acid by prescription, at first pour the deionized water of about 2/3 volume into, sulfuric acid is added slowly and stir cooling, slowly inject small amount of deionized water according to the formulations prepared from solutions volume at last.The acid solution component is: sulfuric acid (H
2SO
4) 200g/L, add two stainless steel plates connection power cathodes and put into solution.
Be that aluminum substrate is tied up aluminum component with aluminium wire, it is that 50 ℃ acetone soln soaked 15 minutes that part is put into temperature; Aluminum component after the immersion treatment is put into chemical deoiling and degreasing solution, and utilize ultrasonic the cleaning, ultrasonic power can take the circumstances into consideration to regulate according to practical situation, and scavenging period 15 minutes is put into part clean hot water subsequently and soaked 30 seconds.
Aluminum substrate is carried out alkali cleaning, and it is that 40 ~ 60 ℃ of content are 10% sodium hydroxide solution 10 seconds that the silumin matrix is put into temperature, cleans 20 seconds in the hot water that flows, and cleans 30 seconds in the deionized water that flows again; Pickling 10 ~ 20s is carried out in the back in nitric acid and water volume ratio are the solution of 1:3, cleaned 10 ~ 30 seconds in mobile pure water.
Aluminum substrate is put into anodic oxidation solution carry out anodic oxidation treatment, the aluminium wire of tying up aluminum substrate is connected to positive source puts into solution; It is 12V that voltage is set; According to current density: 0.6A/dm
2And the surface-area of part calculates size of current; Treatment time: 40Min; EO cleans aluminum component 30 seconds in the pure water that flows.
It is 80 ℃ coloring solution that aluminum substrate behind the deposited oxide film is put into temperature, and soak time 15 minutes behind the EO, is cleaned aluminum component 60 seconds in the pure water that flows, and in dehydrated alcohol plating piece is dewatered 5 seconds.Put into baking oven, dry 20min under 100 ℃ of conditions after with nitrogen plating piece being dried up.
Finally through the microscopic appearance, the oxide film outward appearance is light green, and color and luster is even; Through the volt ohm-milliammeter test, the aluminum component surface insulation utilizes scalpel to scratch, and hardness improves a lot than aluminum component; So far, a kind of on aluminum substrate the flow process of anodic oxidation and chemical stain (green) all finish.
[embodiment 2]
Preparation coloring solution: take by weighing potassium bichromate, yellow soda ash by formula ratio, pour earlier the deionized water of 1/3 volume in the vessel into, vessel are put into the heating in water bath groove be heated to 80 ℃, successively potassium bichromate, yellow soda ash are poured into fully dissolving in the vessel, add the deionized water of residual volume again.The coloring solution composition and the content that are mixed with are: potassium bichromate (KCr2O7) 100g/L, yellow soda ash (Na
2CO
3) 18g/L.
Preparation chemical deoiling and degreasing solution, according to prescription weighing sodium carbonate, sodium phosphate, emulsifier op-10, be mixed with solution and be cooled to room temperature, the chemical deoiling and degreasing solution composition and the content that are mixed with are: yellow soda ash 20g/L, sodium phosphate 20g/L, emulsifying agent (OP-10) 3g/L.
Preparation anodic oxidation solution: measure sulfuric acid by prescription, at first pour the deionized water of about 2/3 volume into, sulfuric acid is added slowly and stir cooling, slowly inject small amount of deionized water according to the formulations prepared from solutions volume at last.The acid solution component is: sulfuric acid (H
2SO
4) 200g/L, add 2 stainless steel plates connection power cathodes and put into solution.
Tie up aluminum component with aluminium wire, it is that 50 ℃ acetone soln soaked 15 minutes that part is put into temperature; Aluminum component after the immersion treatment is put into chemical deoiling and degreasing solution, and utilize ultrasonic the cleaning, ultrasonic power can take the circumstances into consideration to regulate according to practical situation, and scavenging period 15 minutes is put into part clean hot water subsequently and soaked 30 seconds.
Aluminum substrate is carried out alkali cleaning, and it is that 40 ~ 60 ℃ of content are 10% sodium hydroxide solution 10 seconds that the silumin matrix is put into temperature, cleans 20 seconds in the hot water that flows, and cleans 30 seconds in the deionized water that flows again; Pickling 10 ~ 20s is carried out in the back in nitric acid and water volume ratio are the solution of 1:3, cleaned 10 ~ 30 seconds in mobile pure water.
Aluminum substrate is put into anodic oxidation solution carry out anodic oxidation treatment, the aluminium wire of tying up aluminum substrate is connected to positive source puts into solution; It is 12V that voltage is set; According to current density: 0.6A/dm
2And the surface-area of part calculates size of current; Treatment time: 40Min; EO cleans aluminum component 30 seconds in the pure water that flows.
It is 80 ℃ coloring solution that aluminum substrate behind the deposited oxide film is put into temperature, and soak time 10 minutes behind the EO, is cleaned aluminum component 60 seconds in the pure water that flows, and in dehydrated alcohol plating piece is dewatered 5 seconds.Put into baking oven, dry 20min under 100 ℃ of conditions after with nitrogen plating piece being dried up.
Finally through the microscopic appearance, the oxide film outward appearance is green, wants dark than case study on implementation 1, and color and luster is even, shows that soak time is more long, and oxidation film coloring is more dark; Through the volt ohm-milliammeter test, the aluminum component surface insulation utilizes scalpel to scratch, and hardness improves a lot than aluminum component; So far, a kind of on aluminum substrate the flow process of anodic oxidation and chemical stain (green) all finish.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a coloring solution prescription is characterized in that, the directly chemical stain on the aluminum anodized film of aluminum substrate of the coloring solution of its preparation, and this coloring solution prescription comprises: potassium bichromate (KCr
2O
7) 90 ~ 125g/L, yellow soda ash (Na
2CO
3) 15 ~ 20g/L, the purity of this potassium bichromate, this yellow soda ash is analytical pure, and deionized water is adopted in this coloring solution preparation.
2. coloring solution preparation method, it is characterized in that, it is for the preparation of going out the directly coloring solution of chemical stain on the aluminum anodized film of aluminum substrate, and it adopts coloring solution formulation as claimed in claim 1, and this coloring solution is the preparation method may further comprise the steps:
Formula ratio by this coloring solution prescription takes by weighing this potassium bichromate, this yellow soda ash, pour earlier the deionized water of 1/3 container volume specification in the vessel into, aluminum substrate is carried out in the selection of container volume specification can be immersed in the interior principle of container fully, these vessel are put into the heating in water bath groove be heated to 80 ℃, successively this potassium bichromate, this yellow soda ash are poured into fully dissolving in these vessel, the deionized water that adds residual volume again, the solution face graticule corresponding with containers size maintained an equal level, form directly this coloring solution of chemical stain on aluminum anodized film.
3. a coloring solution is used, and it is characterized in that the directly chemical stain application on the aluminum anodized film of aluminum substrate of its coloring solution of making for coloring solution preparation method as claimed in claim 2.
4. coloring solution as claimed in claim 3 is used, and it is characterized in that, the applying step that described coloring solution is used is as follows:
A, aluminum substrate is fully deoiled;
B, this aluminum substrate is carried out alkali cleaning, it is that 40 ~ 60 ℃ of content are 10% sodium hydroxide solution 10 ~ 20 seconds that this aluminum substrate is put into temperature, in the deionized water that flows, cleaned 10 ~ 30 seconds, in the deionized water that flows, cleaned 10 ~ 30 seconds again, go to next step;
C, this aluminum substrate is carried out pickling, in nitric acid and water volume ratio are the solution of 1:3, carry out pickling 10 ~ 20s, in the pure water that flows, cleaned 10 ~ 30 seconds, go to next step;
D, this aluminum substrate is put into anodic oxidation solution carry out anodic oxidation treatment, prepare this anodic oxidation solution: H by following composition and proportioning
2SO
4180～200g/L adds two stainless steel plates connection power cathodes and puts into this anodic oxidation solution during operation, this aluminum substrate is connected positive source put into this anodic oxidation solution; Operation electrolysis voltage: 8～12V; Actuating current density: 0.5～0.8A/dm
2The thickness of oxide film is relevant with operation electrolysis voltage, current density and time, and according to above parameter operation, the sedimentation velocity of the oxide film that deposits on this aluminum substrate is: 3 ~ 4um/hour; In the pure water that flows, cleaned 10 ~ 30 seconds behind the EO, go to next step;
E, the aluminum substrate behind the deposited oxide film is put into temperature is 80 ℃ coloring solution, soak time 8 ~ 20 minutes, and the length of time has determined the shade that aluminum substrate is painted; Behind the EO, aluminum substrate was cleaned 45 ~ 60 seconds in the pure water that flows, go to next step;
F, dry after in dehydrated alcohol, aluminum substrate being dewatered 2～5 seconds.
5. coloring solution as claimed in claim 4 is used, and it is characterized in that, aluminum substrate is fully deoiled, and is divided into the processing of two steps:
At first, organic deoiling, it is 40 ~ 60 ℃ acetone soln that aluminum substrate is put into temperature, soaks 15 ~ 20 minutes;
Secondly, chemical deoiling and degreasing is put into chemical deoiling and degreasing solution with the aluminum substrate after the immersion treatment, and ultrasonic immersion 15 ~ 20 minutes was soaked the aluminum substrate after the immersion treatment 0.5 ~ 1 minute in hot water, go to next step.
6. coloring solution as claimed in claim 5 is used, and it is characterized in that the proportioning of described chemical deoiling and degreasing solution is: yellow soda ash (Na
2CO
3) 20 g/l, sodium phosphate (Na
3PO
4) 20 g/l, emulsifying agent (OP-10) 3 g/l.
7. coloring solution as claimed in claim 4 is used, and it is characterized in that, in step D, in dehydrated alcohol aluminum substrate is dewatered 2～5 seconds, puts into baking oven after with nitrogen aluminum substrate being dried up, dry 10 ~ 20min under 80～100 ℃ of conditions.
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|---|---|---|---|
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|---|---|---|---|
| CN201310123697.7A CN103194779B (en) | 2013-04-10 | 2013-04-10 | Application of coloring solution |
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| CN103194779B CN103194779B (en) | 2016-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543930A (en) * | 2015-12-22 | 2016-05-04 | 安徽华东光电技术研究所 | Aluminum insulating bush and preparation method thereof |
| CN112760690A (en) * | 2020-12-19 | 2021-05-07 | 河南中车重型装备有限公司 | Surface treatment process before coloring of subway aluminum alloy section |
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| GB387806A (en) * | 1930-12-17 | 1933-02-16 | Robert Secrest Dunham | Improvements in or relating to the surface treatment of aluminium or aluminium alloys |
| CN101550580A (en) * | 2009-04-04 | 2009-10-07 | 李继光 | Coloring treatment process at aluminium alloy section surface by anodic oxidation method |
| CN102234802A (en) * | 2010-04-21 | 2011-11-09 | 中国科学院金属研究所 | Method for preparing multilayer high corrosion resistant-wear resistant composite protective coating on magnesium alloy surface |
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2013
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| CN102234802A (en) * | 2010-04-21 | 2011-11-09 | 中国科学院金属研究所 | Method for preparing multilayer high corrosion resistant-wear resistant composite protective coating on magnesium alloy surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543930A (en) * | 2015-12-22 | 2016-05-04 | 安徽华东光电技术研究所 | Aluminum insulating bush and preparation method thereof |
| CN112760690A (en) * | 2020-12-19 | 2021-05-07 | 河南中车重型装备有限公司 | Surface treatment process before coloring of subway aluminum alloy section |
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