CN103352244A - High-light anode oxidation and electrophoresis process of aluminium alloy - Google Patents
High-light anode oxidation and electrophoresis process of aluminium alloy Download PDFInfo
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- CN103352244A CN103352244A CN2013102471461A CN201310247146A CN103352244A CN 103352244 A CN103352244 A CN 103352244A CN 2013102471461 A CN2013102471461 A CN 2013102471461A CN 201310247146 A CN201310247146 A CN 201310247146A CN 103352244 A CN103352244 A CN 103352244A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000001962 electrophoresis Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 37
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 36
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 34
- 230000003647 oxidation Effects 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004411 aluminium Substances 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000003973 paint Substances 0.000 claims abstract description 10
- 238000004040 coloring Methods 0.000 claims abstract description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 23
- 238000004043 dyeing Methods 0.000 claims description 21
- 238000005406 washing Methods 0.000 claims description 19
- 239000000975 dye Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002203 pretreatment Methods 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000004070 electrodeposition Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000007517 polishing process Methods 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 150000002815 nickel Chemical class 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- RCIVOBGSMSSVTR-UHFFFAOYSA-L stannous sulfate Chemical compound [SnH2+2].[O-]S([O-])(=O)=O RCIVOBGSMSSVTR-UHFFFAOYSA-L 0.000 claims description 2
- 229940095064 tartrate Drugs 0.000 claims description 2
- 229910000375 tin(II) sulfate Inorganic materials 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 3
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 239000003513 alkali Substances 0.000 abstract 1
- 238000010923 batch production Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000004886 process control Methods 0.000 abstract 1
- -1 3-6g/L Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a high-light anode oxidation and electrophoresis process of aluminium alloy, which is rarely used in the industry of all aluminum material factories and is most suitable for batch production. The high-light anode oxidation and electrophoresis process comprises the following procedures of: (1) high-light treatment of the aluminium alloy; (2) generation of an oxidation film by anode oxidation; (3) coloring; (4) high-temperature hole sealing; and (5) electrophoresis and curing procedures. The high-light anode oxidation and electrophoresis process disclosed by the invention has the advantages that for the aluminium treated by the process, the color is bright without large change, a layer of electrophoresis paint film is coated on the surface, the glossiness is bright, the corrosion resistance and the weather resistance are optimal, the decorative effect is optimal, the aluminum alloy can be arranged outdoors for sunning, the acid and alkali resistance is high, and the process control is easy in the production process.
Description
Technical field
The present invention relates to a kind of aluminium alloy anode oxide process of surface treatment, particularly relate to the production technique of the high light anodic oxidation of a kind of aluminium alloy electrophoresis.
Background technology
Aluminium is strong especially to the chemical affinity of oxygen, and its total surface is covered by the oxide film of one deck dog's life in atmosphere, but natural alumite as thin as a wafer, and porosity is large, and physical strength is low, and against corrosion and wear resistance all can not satisfy etch-proof needs.Utilize electrochemical method, can make the quality oxide film of aluminium (or aluminium alloy) Surface Creation densification, and film is thicker, it all reads to reach tens to the hundreds of micron, effectively the erosion resistance of increase rate.In addition, because there is uniform space in formed oxide film, so the dyeing of available organic dye polarity is processed, color and luster is stable after sealing, makes the application of aluminium more extensive, makes like this electrochemical process of aluminium surface oxidation be called anodizing of aluminium.
General only carry out the anodic oxidation electrophoresis process in the not strong aluminum alloy surface of brightness and process, and treatment process often effect is not fully up to expectations, require further improvement necessity of its technology.
Summary of the invention
The object of the present invention is to provide the organic dyeing electrophoresis process of a kind of aluminium alloy anode oxide, it can be obtained brightness height, rete height, electrocoating paint protection, weather-proof, heat-resisting, fast light, anti-corrosion effective production technique are arranged.
The object of the invention to solve the technical problems realizes by the following technical solutions.The high light anodic oxidation of a kind of aluminium alloy electrophoresis process according to the present invention proposes may further comprise the steps:
1) high optical processing: at first be the blank aluminium section bar to be carried out mechanical polishing process, operation steps is to be contained in cloth wheel to add wax on the motor and in high speed rotating aluminum alloy surface is swept line, 3-4 time back and forth, until the mechanical lines of extruding is swept off, the effect that bright mirror surface occurs, the cloth wheel with the aluminum alloy surface pressure to current is: 25-35A.
Carry out afterwards chemical rightenning, section bar is placed in the chemical polishing bath, carry out chemical rightenning and process, three acid tank liquid allocation ratios are: phosphoric acid (85%) is 60-80%, sulfuric acid: 15-35%, nitric acid: 5%, and treatment temp is 100-130 ℃.Enter lower operation after handling and carry out anodic oxidation production oxide film.
2) anodic oxidation treatment: the section bar that high optical processing is good carries out anodic oxidation treatment in anode oxidation groove liquid, its processing condition are: industrial sulphuric acid (98%): 140-180 grams per liter, temperature: 18-22 ℃, current density 1.2-1.5 peace/square decimeter.According to the period that requires of anode oxide film, handle by 2-3 washing and enter next procedure.
3) painted: will enter through the section bar after the anodic oxidation treatment painted groove, the tank liquor proportioning as requested difference and difference mainly is divided into following two kinds:
1. dyeing: washing, because being arranged in the fenestra after the oxidation, pickling totally can not dye, so this procedure washing must be tight, the oxidation after washing will be through the washing of three roads, the per pass washing will be wanted 1-2 minute in tank; Various metals dyestuff ([NNN-] metallized azo dyestuff 3-5 grams per liter), PH:5.5-6.5, temperature normal temperature, dyeing time 1-3 minute.Enter the next process high temperature hole sealing after the dyeing.
2. electrolytic coloring: stannous sulfate 6-9 grams per liter, single nickel salt 20-24 grams per liter, coloring stabilizer 15-20 gram liter, tartrate 15-20 grams per liter, sulfuric acid 16-20 liter, temperature 18-22 ℃, painted time 1-25 minute, next process electrophoresis.
Directly enter the subsequent processing electrophoresis after silvery white (mirror effect) washing is good, do not do painted processing.
4) high temperature hole sealing: will dye lustful section bar and in the sealing of hole groove, carry out sealing of hole processing, tank liquor main component: hole sealing agent (vinylformic acid), 3-6g/L, Ni
2+: 1.0-2.0g/L, temperature 55-65 ℃, PH:6-7 handles by once washing and enters next procedure.
5) electrophoresis solidifies: after the section bar that sealing of hole is good is washed (once pure hot water, 1 st pure water are washed), hang in and carry out (2-5min) behind the electrophoresis painting film in the electrophoresis chamber, carry out twice washing, put into the drip-dry district, then put into and be cured operation (solidifying: temperature 180-200 ℃, insulation 20-30 minute) in the electrophoresis stove, hardness of paint film reaches more than the 3H, unloads the frame packing after finishing.
Electrophoresis chamber tank liquor (acrylic resin) composition is: the electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5, specific conductivity: 350-1000us/cm.
By technique scheme, the advantage that the present invention has is:
High light anodic oxidation of the present invention has brightness glossy again, and the good resistance to acids and bases of rete is strong; Can also change traditional painted color, multi-colour Al-alloy that can high brightness is used in exterior decoration, has improved the class of a step of product aspect decoration.
Description of drawings
Fig. 1 is explained hereafter schematic flow sheet of the present invention.
Embodiment
The aluminium alloy of technique of the present invention, bright-colored equal to much variations, one deck electrodeposited paint film is returned in the outside, and glossiness is bright, solidity to corrosion and weathering resistance best, decorative effect is best, aluminium alloy is got sun outside can being contained in and stopping up, acid-proof alkaline is high, and technique is controlled well in process of production.
See also shown in Figure 1ly, following explained hereafter flow process is adopted in invention:
1) the high optical processing of aluminium alloy: at first be the blank aluminium section bar to be carried out mechanical polishing process, carry out afterwards chemical rightenning;
2) anodic oxidation generates oxide film: the section bar that high optical processing is good carries out anodic oxidation treatment in anode oxidation groove liquid;
3) painted: as will to enter through the section bar after the anodic oxidation treatment painted groove and dye or electrolytic coloring;
4) high temperature hole sealing: will dye lustful section bar and in the sealing of hole groove, carry out the sealing of hole processing;
5) electrophoresis curing process: the section bar that sealing of hole is good is washed rear electrophoresis and is solidified.
Below by reference to the accompanying drawings the present invention is done further in detail statement by concrete preferred embodiment, but the present invention is not limited in following embodiment.
Embodiment 1
Surface of profile pre-treatment: the blank aluminium section bar is carried out mechanical polishing process, operation steps is to be contained in the cloth wheel to add wax on the motor, high speed rotating is swept line to aluminum alloy surface again, then use that phosphoric acid (85%) is 60%, sulfuric acid: 35%, nitric acid: 5% 3 kind of acid configuration tank liquor, under 120 ℃ of environment, carry out chemical rightenning and process, obtain being better than the mirror aluminum alloy surface of traditional pre-treatment.The aluminium section bar that advanced pre-treatment immerses anodic oxidation, sulfuric acid 160 grams per liters, temperature: 20 ℃, oxidization time 20 minutes, current density 1.5 peaces/square decimeter obtain water white anode oxide film.Positioning product 1# series is used for indoor.
Through three washings, enter the dyeing of painted groove warehouse entry, dyestuff ([NNN-] metallized azo dyestuff) 5g/L is dyeing time 1 minute under 6 the environment in normal temperature pH value, rear aluminium section bar obtains dyeing.
Through three washings, enter the sealing of hole groove, the tank liquor main component: hole sealing agent (vinylformic acid), 3-6g/L, Ni
2+: 1.0-2.0g/L, temperature 60 C, PH:6 processed 10 minutes.
After the section bar that sealing of hole is good is washed (once pure hot water, 1 st pure water are washed), at the electrocoating paint solid content: 4.5 grams per liters, PH:7.5, acid number: 4.0, amine value: 3.0, specific conductivity: carry out the electrophoresis painting film in the electrophoresis chamber under the 900us/cm environment, put into after the drip-dry and be cured operation (solidifying: 185 ℃ of temperature, insulation 25 minutes) in the electrophoresis stove, unload the frame packing after finishing.
Embodiment 2
Surface of profile pre-treatment: the blank aluminium section bar is carried out mechanical polishing process, operation steps is to be contained in cloth wheel to add wax on the motor and in high speed rotating aluminum alloy surface is swept line, then use that phosphoric acid (85%) is 60%, sulfuric acid: 35%, nitric acid: 5% 3 kind of acid configuration tank liquor, under 120 ℃ of environment, carry out chemical rightenning and process, obtain being better than the mirror aluminum alloy surface of traditional pre-treatment.The aluminium section bar that advanced pre-treatment immerses anodic oxidation, sulfuric acid 180 grams per liters, temperature: 20 ℃, oxidization time 35 minutes, current density 1.5 peaces/square decimeter obtain water white anode oxide film.Location 2# series product are used for outdoor.
Through three washings, enter the dyeing of painted groove warehouse entry, dyestuff ([NNN-] metallized azo dyestuff) 5g/L is dyeing time 1 minute under 6 the environment in normal temperature pH value, rear aluminium section bar obtains dyeing.
Through three washings, enter the sealing of hole groove, the tank liquor main component: hole sealing agent (vinylformic acid), 3-6g/L, Ni
2+: 1.0-2.0g/L, temperature 60 C, PH:6 processed 10 minutes.
After the section bar that sealing of hole is good is washed (once pure hot water, 1 st pure water are washed), at the electrocoating paint solid content: 4.5 grams per liters, PH:7.5, acid number: 4.0, amine value: 3.0, specific conductivity: carry out the electrophoresis painting film in the electrophoresis chamber under the 900us/cm environment, put into after the drip-dry and be cured operation (solidifying: 185 ℃ of temperature, insulation 25 minutes) in the electrophoresis stove, unload the frame packing after finishing.
Embodiment 3
Surface of profile pre-treatment: the blank aluminium section bar is carried out mechanical polishing process, operation steps be with cloth wheel be contained in add on the motor wax again high speed rotating aluminum alloy surface is swept line, then use that phosphoric acid (85%) is 60%, sulfuric acid: 35%, nitric acid: 5% 3 kind of acid configuration tank liquor, carry out chemical rightenning and process, obtain being better than the mirror aluminum alloy surface of traditional pre-treatment.The aluminium section bar that advanced pre-treatment immerses anodic oxidation, sulfuric acid 180 grams per liters, temperature: 20 ℃, oxidization time 28 minutes, current density 1.5 peaces/square decimeter obtain water white anode oxide film.Location 3# series product are used for outdoor.
Then enter the sealing of hole groove and carry out sealing of hole, the tank liquor main component: hole sealing agent (vinylformic acid), 3-6g/L, Ni
2+: 1.0-2.0g/L, temperature 60 C, PH:6 processed 10 minutes.
After the section bar that sealing of hole is good is washed (once pure hot water, 1 st pure water are washed), at the electrocoating paint solid content: 4.5 grams per liters, PH:7.5, acid number: 4.0, amine value: 3.0, specific conductivity: carry out the electrophoresis painting film in the electrophoresis chamber under the 900us/cm environment, put into after the drip-dry and be cured operation (solidifying: 185 ℃ of temperature, insulation 25 minutes) in the electrophoresis stove, unload the frame packing after finishing.
Following table 1 is electrophoresis process and the contrast of other surface treatment color of the embodiment of the invention.
Table 1 electrophoresis process of the present invention and the contrast of other surface treatment color
Can be found out that by above-mentioned table 1 the high photoelectrophoresis technique of embodiments of the invention is compared with common electrophoresis process, solidity to corrosion and good weatherability, cost is low, silvery white brightness and have colorant brightness high.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, so every technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does according to technical spirit of the present invention.
Claims (8)
1. the high light anodic oxidation of aluminium alloy electrophoresis process is characterized in that it may further comprise the steps:
1) the high optical processing of aluminium alloy: at first be the blank aluminium section bar to be carried out mechanical polishing process, carry out afterwards chemical rightenning;
2) anodic oxidation generates oxide film: the section bar that high optical processing is good carries out anodic oxidation treatment in anode oxidation groove liquid;
3) painted: as will to enter through the section bar after the anodic oxidation treatment painted groove and dye or electrolytic coloring;
4) high temperature hole sealing: will dye lustful section bar and in the sealing of hole groove, carry out the sealing of hole processing;
5) electrophoresis curing process: the section bar that sealing of hole is good is washed rear electrophoresis and is solidified.
2. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1, it is characterized in that: in the step 1), be contained in cloth wheel and add wax on the motor, high speed rotating is swept line to aluminum alloy surface again, then use that phosphoric acid (85%) is 60%, sulfuric acid: 35%, nitric acid: 5% 3 kind of acid configuration tank liquor, under 120 ℃ of environment, carry out chemical rightenning and process, obtain being better than the mirror aluminum alloy surface of traditional pre-treatment.
3. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1, it is characterized in that: step 2) in, the aluminium section bar that advanced pre-treatment immerses anodic oxidation, sulfuric acid 160 grams per liters, temperature: 20 ℃, oxidization time 20 minutes, current density 1.5 peaces/square decimeter obtain water white anode oxide film.
4. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1 is characterized in that: in the step 3), dyeing need to be processed through washing, and the oxidation after washing will be through the washing of three roads, and the per pass washing will be wanted 1-2 minute in tank; Various metals dyestuff (metallized azo dyestuff 3-5 grams per liter), PH:5.5-6.5, temperature normal temperature, dyeing time 1-3 minute.Enter the next process high temperature hole sealing after the dyeing.
5. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1, it is characterized in that: in the step 3), the electrolytic colouring technology condition is: stannous sulfate 6-9 grams per liter, single nickel salt 20-24 grams per liter, coloring stabilizer 15-20 gram liter, tartrate 15-20 grams per liter, sulfuric acid 16-20 liter, temperature 18-22 ℃, painted time 1-25 minute, the next process electrophoresis.
6. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1 is characterized in that: in the step 4), will dye lustful section bar and carry out sealing of hole processing, tank liquor main component: hole sealing agent (acetic acid solution), 3-6g/L, Ni in the sealing of hole groove
2+: 1.0-2.0g/L, temperature 55-65 ℃, PH:6-7 handles by once washing and enters next procedure.
7. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 1, it is characterized in that: in the step 5), after the section bar that sealing of hole is good is washed (once pure hot water, 1 st pure water are washed), hang in and carry out (2-5min) behind the electrophoresis painting film in the electrophoresis chamber, carry out twice washing, put into the drip-dry district, then put into and be cured operation (solidifying: temperature 180-200 ℃, insulation 20-30 minute) in the electrophoresis stove, hardness of paint film reaches more than the 3H, unloads the frame packing after finishing.
8. the organic dyeing electrophoresis process of aluminium alloy anode oxide according to claim 7, it is characterized in that: electrophoresis chamber tank liquor (acrylic resin) composition is: the electrocoating paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5, acid number: 3.0-4.0, amine value: 2.0-3.5, specific conductivity: 350-1000us/cm.
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