CN104562151A - Method for extinction electrophoresis of aluminum alloy section - Google Patents
Method for extinction electrophoresis of aluminum alloy section Download PDFInfo
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- CN104562151A CN104562151A CN201510022034.5A CN201510022034A CN104562151A CN 104562151 A CN104562151 A CN 104562151A CN 201510022034 A CN201510022034 A CN 201510022034A CN 104562151 A CN104562151 A CN 104562151A
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- aluminium alloy
- alloy extrusions
- aluminum alloy
- electrophoresis
- alloy section
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a method for extinction electrophoresis of an aluminum alloy section. The method comprises the following steps: (a) soaking the aluminum alloy section into an acid solution, an alkaline solution and water in sequence to remove grease on the surface; (b) performing anodic oxidation on the aluminum alloy section without the grease to from an oxide film on the surface of the aluminum alloy section; (c) soaking the aluminum alloy section after the anodic oxidation into a solution containing nickel sulfate and stannous sulfate, and electrifying for coloring; (d) soaking the colored aluminum alloy section into electrophoretic paint, and electrifying for electrophoresis; and (e) heating the aluminum alloy section after electrophoresis at 170-220 DEG C for 10-50 minutes. The aluminum alloy section after the anodic oxidation is soaked into the solution containing nickel sulfate and stannous sulfate to perform electrified coloring, so that a black extinction film layer can be formed on the surface of the aluminum alloy section, thereby avoiding light pollution generated by formation of an aluminum alloy.
Description
Technical field
The invention belongs to electrochemical field, be specifically related to a kind of aluminium alloy extrusions extinction electrophoresis method.
Background technology
Aluminium alloy is the extension product of fine aluminium, the little (ρ=2.7g/m of density of fine aluminium
3), be approximately 1/3 of iron, and fusing point is low, is about about 660 DEG C, aluminium is face-centred cubic structure, therefore has very high plasticity (δ: 32 ~ 40%, ψ: 70 ~ 90%), and therefore it is easy to processing, can be made into various section bar, sheet material, and corrosion resistance is good.
Aluminum alloy surface is comparatively smooth, easy reflection ray and produce photochemical pollution.Electrodeposited paint film is conventional delustring means, and it has plentiful, even, smooth, the smooth advantage of coating, and the hardness of electrodeposited paint film, sticking power, corrosion resistant, impact property, penetrating quality are obviously better than other coating process.
Summary of the invention
The present invention seeks to provide a kind of aluminium alloy extrusions extinction electrophoresis method to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the present invention is: a kind of aluminium alloy extrusions extinction electrophoresis method, and it comprises the following steps successively:
A aluminium alloy extrusions is dipped in acidic solution, basic solution, water by () successively, remove the grease on its surface;
B () carries out anodic oxidation to the aluminium alloy extrusions removing grease, form oxide film on its surface;
C aluminium alloy extrusions after anodic oxidation immerses in the solution containing single nickel salt and stannous sulfate by (), be energized painted;
D aluminium alloy extrusions after painted immerses in electrocoating paint by (), energising electrophoresis;
E aluminium alloy extrusions after electrophoresis is placed in 170 ~ 220 DEG C of heating 10 ~ 50 minutes by ().
Optimally, described step (a) comprising:
(a1) aluminium alloy extrusions is dipped in 10 ~ 30 DEG C, concentration is in the sulphuric acid soln of 0.05 ~ 1mol/L 1 ~ 5 minute;
(a2) again aluminium alloy extrusions is dipped in 10 ~ 30 DEG C subsequently, concentration is in the sodium hydroxide of 0.05 ~ 1mol/L 1 ~ 5 minute;
(a3) then aluminium alloy extrusions is dipped in the deionized water of 10 ~ 30 DEG C and washs.
Optimally, in step (c), the concentration of described single nickel salt is 20 ~ 30g/L, and the concentration of described stannous sulfate is 8 ~ 10g/L; The described solution containing single nickel salt and stannous sulfate also comprises the sulfuric acid of 15 ~ 25 g/L, and its pH most 0.8 ~ 1.2, temperature is 15 ~ 25 DEG C; The described color duration that is energized is 600 ~ 700 seconds, voltage is 15 ~ 20V.
Optimally, described step (d) comprising:
(d1) aluminium alloy extrusions after painted is immersed in the electrocoating paint of 20 ~ 50 DEG C, soak 30 ~ 60 seconds;
(d2) voltage be 250 ~ 300V, electric current is 15 ~ 25A/m
2be energized under condition electrophoresis 2 ~ 5 minutes;
(d3) stop energising, then aluminium alloy extrusions is soaked 30 ~ 60 seconds;
(d4) aluminium alloy section surface is washed.
Because technique scheme is used, the present invention compared with prior art has following advantages: aluminium alloy extrusions extinction electrophoresis method of the present invention, by being immersed by the aluminium alloy extrusions after anodic oxidation, to carry out energising in the solution containing single nickel salt and stannous sulfate painted, the delustring rete of black can be formed like this at aluminium alloy section surface, avoid aluminium alloy and form generation light pollution; On the other hand the aluminium alloy extrusions after electrophoresis is placed in 170 ~ 220 DEG C of heating 10 ~ 50 minutes, is conducive to the intensity, the sticking power that improve delustring rete and electrophoresis rete, thus improves corrosion resistant, impact property, the perviousness of aluminium alloy extrusions.
Embodiment
To be described in detail to the preferred embodiment of the invention below:
Embodiment 1
The present embodiment provides a kind of aluminium alloy extrusions extinction electrophoresis method, and it comprises the following steps successively:
A aluminium alloy extrusions is dipped in 10 DEG C by () (a1), concentration is in the sulphuric acid soln of 1mol/L 1 minute;
(a2) again aluminium alloy extrusions is dipped in 10 DEG C subsequently, concentration is in the sodium hydroxide of 1mol/L 1 minute;
(a3) then aluminium alloy extrusions is dipped in the deionized water of 10 DEG C and washs.
B () carries out anodic oxidation to the aluminium alloy extrusions removing grease, form oxide film on its surface;
C aluminium alloy extrusions after anodic oxidation immerses in the solution containing single nickel salt and stannous sulfate by (), be energized painted; The concentration of single nickel salt is 20g/L, and the concentration of stannous sulfate is 8g/L; Solution containing single nickel salt and stannous sulfate also comprises the sulfuric acid of 15g/L, and its pH most 0.8, temperature is 15 DEG C; The color duration that is energized is 600 seconds, voltage is 15V;
D aluminium alloy extrusions after painted immerses in the electrocoating paint of 20 DEG C by () (d1), soak 60 seconds;
(d2) voltage be 250V, electric current is 15A/m
2be energized under condition electrophoresis 5 minutes;
(d3) stop energising, then aluminium alloy extrusions is soaked 30 seconds;
(d4) aluminium alloy section surface is washed.
E aluminium alloy extrusions after electrophoresis is placed in 170 DEG C of heating 50 minutes by ().
Embodiment 2
The present embodiment provides a kind of aluminium alloy extrusions extinction electrophoresis method, and it comprises the following steps successively:
A aluminium alloy extrusions is dipped in 30 DEG C by () (a1), concentration is in the sulphuric acid soln of 0.05mol/L 5 minutes;
(a2) again aluminium alloy extrusions is dipped in 30 DEG C subsequently, concentration is in the sodium hydroxide of 0.05mol/L 5 minutes;
(a3) then aluminium alloy extrusions is dipped in the deionized water of 30 DEG C and washs.
B () carries out anodic oxidation to the aluminium alloy extrusions removing grease, form oxide film on its surface;
C aluminium alloy extrusions after anodic oxidation immerses in the solution containing single nickel salt and stannous sulfate by (), be energized painted; The concentration of single nickel salt is 30g/L, and the concentration of stannous sulfate is 10g/L; Solution containing single nickel salt and stannous sulfate also comprises the sulfuric acid of 25 g/L, and its pH most 1.2, temperature is 25 DEG C; The color duration that is energized is 700 seconds, voltage is 20V.
D aluminium alloy extrusions after painted immerses in the electrocoating paint of 50 DEG C by () (d1), soak 30 seconds;
(d2) voltage be 300V, electric current is 25A/m
2be energized under condition electrophoresis 2 minutes;
(d3) stop energising, then aluminium alloy extrusions is soaked 60 seconds;
(d4) aluminium alloy section surface is washed.
E aluminium alloy extrusions after electrophoresis is placed in 220 DEG C of heating 10 minutes by ().
Embodiment 3
The present embodiment provides a kind of aluminium alloy extrusions extinction electrophoresis method, and it comprises the following steps successively:
A aluminium alloy extrusions is dipped in 20 DEG C by () (a1), concentration is in the sulphuric acid soln of 0.5mol/L 3 minutes;
(a2) again aluminium alloy extrusions is dipped in 20 DEG C subsequently, concentration is in the sodium hydroxide of 0.5mol/L 3 minutes;
(a3) then aluminium alloy extrusions is dipped in the deionized water of 20 DEG C and washs.
B () carries out anodic oxidation to the aluminium alloy extrusions removing grease, form oxide film on its surface;
C aluminium alloy extrusions after anodic oxidation immerses in the solution containing single nickel salt and stannous sulfate by (), be energized painted; The concentration of single nickel salt is 25g/L, and the concentration of stannous sulfate is 9g/L; Solution containing single nickel salt and stannous sulfate also comprises the sulfuric acid of 20 g/L, and its pH most 1, temperature is 20 DEG C; The described color duration that is energized is 650 seconds, voltage is 18V.
D aluminium alloy extrusions after painted immerses in the electrocoating paint of 30 DEG C by () (d1), soak 40 seconds;
(d2) voltage be 280, electric current is 20A/m
2be energized under condition electrophoresis 3 minutes;
(d3) stop energising, then aluminium alloy extrusions is soaked 40 seconds;
(d4) aluminium alloy section surface is washed.
E aluminium alloy extrusions after electrophoresis is placed in 170 ~ 220 DEG C of heating 10 ~ 50 minutes by ().
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to spirit of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (4)
1. an aluminium alloy extrusions extinction electrophoresis method, is characterized in that, it comprises the following steps successively:
A aluminium alloy extrusions is dipped in acidic solution, basic solution, water by () successively, remove the grease on its surface;
B () carries out anodic oxidation to the aluminium alloy extrusions removing grease, form oxide film on its surface;
C aluminium alloy extrusions after anodic oxidation immerses in the solution containing single nickel salt and stannous sulfate by (), be energized painted;
D aluminium alloy extrusions after painted immerses in electrocoating paint by (), energising electrophoresis;
E aluminium alloy extrusions after electrophoresis is placed in 170 ~ 220 DEG C of heating 10 ~ 50 minutes by ().
2. aluminium alloy extrusions extinction electrophoresis method according to claim 1, it is characterized in that, described step (a) comprising:
(a1) aluminium alloy extrusions is dipped in 10 ~ 30 DEG C, concentration is in the sulphuric acid soln of 0.05 ~ 1mol/L 1 ~ 5 minute;
(a2) again aluminium alloy extrusions is dipped in 10 ~ 30 DEG C subsequently, concentration is in the sodium hydroxide of 0.05 ~ 1mol/L 1 ~ 5 minute;
(a3) then aluminium alloy extrusions is dipped in the deionized water of 10 ~ 30 DEG C and washs.
3. aluminium alloy extrusions extinction electrophoresis method according to claim 1, is characterized in that: in step (c), and the concentration of described single nickel salt is 20 ~ 30g/L, and the concentration of described stannous sulfate is 8 ~ 10g/L; The described solution containing single nickel salt and stannous sulfate also comprises the sulfuric acid of 15 ~ 25 g/L, and its pH most 0.8 ~ 1.2, temperature is 15 ~ 25 DEG C; The described color duration that is energized is 600 ~ 700 seconds, voltage is 15 ~ 20V.
4. aluminium alloy extrusions extinction electrophoresis method according to claim 1, it is characterized in that, described step (d) comprising:
(d1) aluminium alloy extrusions after painted is immersed in the electrocoating paint of 20 ~ 50 DEG C, soak 30 ~ 60 seconds;
(d2) voltage be 250 ~ 300V, electric current is 15 ~ 25A/m
2be energized under condition electrophoresis 2 ~ 5 minutes;
(d3) stop energising, then aluminium alloy extrusions is soaked 30 ~ 60 seconds;
(d4) aluminium alloy section surface is washed.
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| CN201510022034.5A CN104562151A (en) | 2015-01-16 | 2015-01-16 | Method for extinction electrophoresis of aluminum alloy section |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189620A (en) * | 2017-06-12 | 2017-09-22 | 陕西铭帝铝业有限公司 | A kind of preparation method of black matt electrophoretic aluminium section |
| CN108085727A (en) * | 2017-12-27 | 2018-05-29 | 重庆市华阳光学仪器有限公司 | A kind of processing method of metal cage ring for telescope |
| CN108707942A (en) * | 2018-05-30 | 2018-10-26 | 江苏和兴汽车科技有限公司 | A kind of technique of aluminium alloy black anodizing electrophoresis |
| CN108914193A (en) * | 2018-08-02 | 2018-11-30 | 佛山市银正铝业有限公司 | A kind of environmentally protective wear-resisting extinction electrophoresis production technology |
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| JPH07150391A (en) * | 1993-11-29 | 1995-06-13 | Aisin Keikinzoku Kk | Clear electrodeposition coating method of aluminum and aluminum alloy |
| CN102505136A (en) * | 2011-11-10 | 2012-06-20 | 肇庆亚洲铝厂有限公司 | Production process for extinction electrophoresis |
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| CN203639594U (en) * | 2013-12-19 | 2014-06-11 | 广东坚美铝型材厂（集团）有限公司 | Production system for frosted translucent electrophoresis aluminum profile |
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2015
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| CN102505136A (en) * | 2011-11-10 | 2012-06-20 | 肇庆亚洲铝厂有限公司 | Production process for extinction electrophoresis |
| CN103695987A (en) * | 2013-12-19 | 2014-04-02 | 广东坚美铝型材厂（集团）有限公司 | Extinction translucent blue electrophoresis aluminium profile and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189620A (en) * | 2017-06-12 | 2017-09-22 | 陕西铭帝铝业有限公司 | A kind of preparation method of black matt electrophoretic aluminium section |
| CN108085727A (en) * | 2017-12-27 | 2018-05-29 | 重庆市华阳光学仪器有限公司 | A kind of processing method of metal cage ring for telescope |
| CN108707942A (en) * | 2018-05-30 | 2018-10-26 | 江苏和兴汽车科技有限公司 | A kind of technique of aluminium alloy black anodizing electrophoresis |
| CN108914193A (en) * | 2018-08-02 | 2018-11-30 | 佛山市银正铝业有限公司 | A kind of environmentally protective wear-resisting extinction electrophoresis production technology |
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Application publication date: 20150429 |