CN103352244B - Aluminium alloy height light anodic oxidation electrophoresis process - Google Patents
Aluminium alloy height light anodic oxidation electrophoresis process Download PDFInfo
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- CN103352244B CN103352244B CN201310247146.1A CN201310247146A CN103352244B CN 103352244 B CN103352244 B CN 103352244B CN 201310247146 A CN201310247146 A CN 201310247146A CN 103352244 B CN103352244 B CN 103352244B
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- anodic oxidation
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Abstract
The invention discloses a kind of aluminium alloy height light anodic oxidation electrophoresis process, in each aluminum material factory industry seldom by, the technique adapting to most batch production, its method can divide several program: 1) aluminium alloy height optical processing；2) anodic oxidation generates oxide-film；3) coloring；4) high temperature hole sealing；5) electrophoresis curing process；The aluminium alloy of present invention process, bright-colored all without much changes, one layer of electrodeposited paint film is returned in outside, glossiness is bright, corrosion resistance and weatherability optimal, decorative effect is optimal, aluminium alloy can be contained in stop up outer get sun, acid-proof alkaline high, technique controls well in process of production.
Description
Technical field
The present invention relates to a kind of aluminium alloy anode oxide process of surface treatment, particularly relate to a kind of aluminium alloy height light anodic oxygen
Change the production technology of electrophoresis.
Background technology
Aluminum is strong especially to the chemical affinity of oxygen, and its total surface is covered by the oxide-film of one layer of dog's life in an atmosphere, but
The alumite being natural is very thin, and porosity is big, and mechanical strength is low, and against corrosion and wearability all can not meet etch-proof
Need.Utilize electrochemical method, the quality oxide film that aluminum (or aluminium alloy) Surface Creation is fine and close can be made, and film is thicker,
It is all read up to tens to hundreds of micron, can be effectively improved the corrosion resistance of rate.Further, since the oxide-film formed
There is uniform space, therefore available organic dyestuff polarity dyeing processes, sealed rear color stability, make the application of aluminium more
Add extensively, so make the electrochemical process of aluminum surface oxidation be referred to as anodizing of aluminium.
The most only carry out anodic oxidation electrophoresis process process in the aluminum alloy surface that brightness is the strongest, and process technique is often imitated
The most not fully up to expectations, require further improvement necessity of its technology.
Summary of the invention
It is an object of the invention to provide a kind of aluminium alloy anode oxide organic dye electrophoresis process, its can obtain brightness high,
Film floor height, electrophoretic paint is had to protect, effective production technology weather-proof, heat-resisting, fast light, anti-corrosion.
The object of the invention to solve the technical problems realizes by the following technical solutions.Propose according to the present invention
A kind of aluminium alloy height light anodic oxidation electrophoresis process, comprises the following steps:
1) high optical processing: be first that blank aluminium section bar is carried out mechanical polishing process, operating procedure is to be contained in electricity with cloth wheel
Add wax on machine, in high-speed rotation, aluminum alloy surface is swept stricture of vagina, 3-4 time back and forth, until the mechanical lines of extruding is swept off,
Occur that the effect of bright mirror surface, cloth wheel with aluminum alloy surface pressure to current are: 25-35A.
Carry out chemical polishing afterwards, section bar is placed in chemical polishing bath, carry out chemical polishing process, three acid tank liquid configurations
Ratio is: phosphoric acid (85%) is 60-80%, sulphuric acid: 15-35%, nitric acid: 5%, and treatment temperature is 100-130 DEG C.
Enter lower operation after having processed and carry out anodic oxidation production oxide-film.
2) anodized: section bar good for high optical processing is carried out anodized in anode oxidation groove liquid, its
Process conditions are: industrial sulphuric acid (98%): 140-180 grams per liter, temperature: 18-22 DEG C, electric current density 1.2-1.5 peace/
Square decimeter.Requirement according to anode oxide film controls the time, enters next procedure through 2-3 washing after having processed.
3) coloring: the section bar after anodized is entered coloring groove, tank liquor proportioning difference as requested and
Difference, is broadly divided into following two:
1. dyeing: washing, can not dye because having acid not wash clean in fenestra after oxidation, so the washing of this one procedure
Must be tight, after oxidation, washing to be washed through three roads, and per pass washing to want 1-2 minute in tank；Various metals contaminates
Material ([-NNN-] metalized azo dyes 3-5 grams per liter), PH:5.5-6.5, temperature room temperature, dyeing time 1-3 minute.
Next process high temperature hole sealing is entered after dyeing.
2. electrolytic coloring: stannous sulfate 6-9 grams per liter, nickel sulfate 20-24 grams per liter, coloring stabilizer 15-20 gram liter, wine
Stone acid 15-20 grams per liter, sulphuric acid 16-20 liter, temperature 18-22 DEG C, coloration time 1-25 minute, next process electrophoresis.
It is directly entered subsequent processing electrophoresis after silvery white (mirror effect) washing is good, does not do coloring treatment.
4) high temperature hole sealing: the section bar that dye is lustful is carried out sealing pores, tank liquor main component: hole sealing agent in sealing of hole groove
(acrylic acid), 3-6g/L, Ni2+: 1.0-2.0g/L, temperature 55-65 DEG C, PH:6-7, through once washing after having processed
Enter next procedure.
5) electrophoresis solidification: after being washed by the section bar that sealing of hole is good (the purest hot water, 1 st pure water are washed), hang in electrophoresis tank
In carry out electrophoresis painting film after (2-5min), carry out twice washing, put into drip-dry district, be then placed in electrophoresis stove carrying out solid
Chemical industry sequence (solidification: temperature 180-200 DEG C, insulation 20-30 minute), hardness of paint film reaches more than 3H, unloads frame after completing
Packaging.
Electrophoresis tank tank liquor (acrylic resin) composition is: electrophoretic paint solid content: 3.5-4.5 grams per liter, PH:7.5-8.5,
Acid number: 3.0-4.0, amine number: 2.0-3.5, electrical conductivity: 350-1000us/cm.
By technique scheme, present invention have the advantage that
The high light anodic oxidation of the present invention, has brightness the most glossy, and the good resistance to acids and bases of film layer is strong；Can also change traditional
Coloring color, can be used in exterior decoration with the multi-colour Al-alloy of high brightness, improve one step of product in terms of decoration
Class.
Accompanying drawing explanation
Fig. 1 is the technique production procedure schematic diagram of the present invention.
Detailed description of the invention
The aluminium alloy of present invention process, bright-colored all without much changes, one layer of electrodeposited paint film is returned in outside, glossiness is bright,
Corrosion resistance and weatherability are optimal, decorative effect is optimal, aluminium alloy can be contained in stop up outer get sun, acid-proof alkaline high, giving birth to
During product, technique controls well.
Refer to shown in Fig. 1, the invention following technique production procedure of employing:
1) aluminium alloy height optical processing: be first that blank aluminium section bar is carried out mechanical polishing process, carry out chemical polishing afterwards；
2) anodic oxidation generates oxide-film: carried out at anodic oxidation in anode oxidation groove liquid by section bar good for high optical processing
Reason；
3) coloring: the section bar after anodized is entered coloring groove and carries out dyeing or electrolytic coloring；
4) high temperature hole sealing: the section bar that dye is lustful is carried out sealing pores in sealing of hole groove；
5) electrophoresis curing process: carry out section bar good for sealing of hole washing rear electrophoresis solidification.
Combine accompanying drawing below by way of concrete preferred embodiment the present invention is expressed in further detail, but the present invention not only limiting
In below example.
Embodiment 1
Surface of profile pre-treatment: blank aluminium section bar is carried out mechanical polishing process, operating procedure is to be contained on motor with cloth wheel
Add wax, then aluminum alloy surface swept stricture of vagina by high-speed rotation, then with phosphoric acid (85%) be 60%, sulphuric acid: 35%,
Nitric acid: 5% 3 kind of acid configuration tank liquor, carries out chemical polishing process under 120 DEG C of environment, obtains being better than tradition pre-treatment
Mirror aluminum alloy surface.The aluminium section bar entering pre-treatment immerses anodic oxidation, sulphuric acid 160 grams per liter, temperature: 20 DEG C, oxygen
20 minutes change time, electric current density 1.5 pacifies/square decimeter, obtains water white anode oxide film.Positioning product 1#
Series, for indoor.
Through three washings, entering coloring groove warehouse entry dyeing, dyestuff ([-NNN-] metalized azo dyes) 5g/L, often
Temperature pH value is dyeing time 1 minute, aluminium section bar after being dyeed in the environment of 6.
Through three washings, enter sealing of hole groove, tank liquor main component: hole sealing agent (acrylic acid), 3-6g/L, Ni2+: 1.0-2.0g/L,
Temperature 60 C, PH:6, process 10 minutes.
After the section bar that sealing of hole is good is washed (the purest hot water, 1 st pure water are washed), at electrophoretic paint solid content: 4.5 grams/
Liter, PH:7.5, acid number: 4.0, amine number: 3.0, electrical conductivity: carry out on electrophoresis in the electrophoresis tank under 900us/cm environment
Paint film, puts into after drip-dry and carries out curing process (solidification: temperature 185 DEG C, insulation 25 minutes) in electrophoresis stove, unload after completing
Frame is packed.
Embodiment 2
Surface of profile pre-treatment: blank aluminium section bar is carried out mechanical polishing process, operating procedure is to be contained in motor with cloth wheel
On add wax, in high-speed rotation, aluminum alloy surface swept stricture of vagina, then with phosphoric acid (85%) be 60%, sulphuric acid: 35%,
Nitric acid: 5% 3 kind of acid configuration tank liquor, carries out chemical polishing process under 120 DEG C of environment, obtains being better than tradition pre-treatment
Mirror aluminum alloy surface.The aluminium section bar entering pre-treatment immerses anodic oxidation, sulphuric acid 180 grams per liter, temperature: 20 DEG C, oxygen
35 minutes change time, electric current density 1.5 pacifies/square decimeter, obtains water white anode oxide film.Location 2# series
Product, for outdoor.
Through three washings, entering coloring groove warehouse entry dyeing, dyestuff ([-NNN-] metalized azo dyes) 5g/L, often
Temperature pH value is dyeing time 1 minute, aluminium section bar after being dyeed in the environment of 6.
Through three washings, enter sealing of hole groove, tank liquor main component: hole sealing agent (acrylic acid), 3-6g/L, Ni2+: 1.0-2.0g/L,
Temperature 60 C, PH:6, process 10 minutes.
After the section bar that sealing of hole is good is washed (the purest hot water, 1 st pure water are washed), at electrophoretic paint solid content: 4.5 grams/
Liter, PH:7.5, acid number: 4.0, amine number: 3.0, electrical conductivity: carry out on electrophoresis in the electrophoresis tank under 900us/cm environment
Paint film, puts into after drip-dry and carries out curing process (solidification: temperature 185 DEG C, insulation 25 minutes) in electrophoresis stove, unload after completing
Frame is packed.
Embodiment 3
Surface of profile pre-treatment: blank aluminium section bar is carried out mechanical polishing process, operating procedure is to be contained in motor with cloth wheel
On add wax high-speed rotation again aluminum alloy surface swept stricture of vagina, then with phosphoric acid (85%) be 60%, sulphuric acid: 35%,
Nitric acid: 5% 3 kind of acid configuration tank liquor, carries out chemical polishing process, obtains being better than the mirror aluminum alloy table of tradition pre-treatment
Face.The aluminium section bar entering pre-treatment immerses anodic oxidation, sulphuric acid 180 grams per liter, temperature: 20 DEG C, oxidization time 28 points
Clock, electric current density 1.5 is pacified/square decimeter, is obtained water white anode oxide film.Location 3# series of products, for room
Outward.
Sealing of hole is carried out, tank liquor main component: hole sealing agent (acrylic acid), 3-6g/L, Ni subsequently into sealing of hole groove2+: 1.0-2.0g/L,
Temperature 60 C, PH:6, process 10 minutes.
After the section bar that sealing of hole is good is washed (the purest hot water, 1 st pure water are washed), at electrophoretic paint solid content: 4.5 grams/
Liter, PH:7.5, acid number: 4.0, amine number: 3.0, electrical conductivity: carry out on electrophoresis in the electrophoresis tank under 900us/cm environment
Paint film, puts into after drip-dry and carries out curing process (solidification: temperature 185 DEG C, insulation 25 minutes) in electrophoresis stove, unload after completing
Frame is packed.
Table 1 below is that the electrophoresis process of the embodiment of the present invention processes color comparator with other surface.
Table 1 electrophoresis process of the present invention processes color comparator with other surface
By above-mentioned table 1 it can be seen that the high photoelectrophoresis technique of embodiments of the invention is compared with general electrophoresis technique, anti-corrosion
Property and good weatherability, low cost, silvery white brightness and have colorant brightness height.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction, therefore
Every without departing from technical solution of the present invention content, according to the technical spirit of the present invention above example is made any simply
Amendment, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (6)
1. an aluminium alloy height light anodic oxidation electrophoresis process, it is characterised in that it comprises the following steps:
1) aluminium alloy height optical processing: be first that blank aluminium section bar is carried out mechanical polishing process, carry out chemical polishing afterwards；
Be contained on motor add wax with cloth wheel, then aluminum alloy surface is swept stricture of vagina by high-speed rotation, then with phosphoric acid (85%) be 60%,
Sulphuric acid: 35%, nitric acid: 5% 3 kind of acid configuration tank liquor, carries out chemical polishing process under 120 DEG C of environment, is better than
The mirror aluminum alloy surface of tradition pre-treatment；
2) anodic oxidation generates oxide-film: carried out at anodic oxidation in anode oxidation groove liquid by section bar good for high optical processing
Reason；
3) coloring: the section bar after anodized is entered coloring groove and carries out dyeing or electrolytic coloring；
4) high temperature hole sealing: the section bar that dye is lustful is carried out sealing pores in sealing of hole groove；Tank liquor main component: hole sealing agent
Acrylic acid, 3-6g/L；Ni2+: 1.0-2.0g/L, temperature 55-65 DEG C, pH:6-7, through once washing entrance after having processed
Next procedure；
5) electrophoresis curing process: carry out section bar good for sealing of hole washing rear electrophoresis solidification.
Aluminium alloy height light anodic oxidation electrophoresis process the most according to claim 1, it is characterised in that: step 2) in,
Aluminium section bar through pre-treatment immerses anodizing tank and carries out anodic oxidation, sulphuric acid 160 grams per liter, temperature: 20 DEG C, oxidation
20 minutes time, electric current density 1.5 pacifies/square decimeter, obtains water white anode oxide film.
Aluminium alloy height light anodic oxidation electrophoresis process the most according to claim 1, it is characterised in that: step 3) in,
Dyeing needs to process through washing, and after oxidation, washing to be washed through three roads, per pass washing in tank 1-2 minute；
Various metals dyestuff, uses metalized azo dyes 3-5 grams per liter, pH:5.5-6.5, temperature room temperature, dyeing time 1-3
Minute.
Aluminium alloy height light anodic oxidation electrophoresis process the most according to claim 1, it is characterised in that: step 3) in,
Electrolytic colouring technology condition is: stannous sulfate 6-9 grams per liter, nickel sulfate 20-24 grams per liter, coloring stabilizer 15-20 gram/
Liter, tartaric acid 15-20 grams per liter, sulphuric acid 16-20 grams per liter, temperature 18-22 DEG C, coloration time 1-25 minute.
Aluminium alloy height light anodic oxidation electrophoresis process the most according to claim 1, it is characterised in that: step 5) in,
After section bar good for sealing of hole is carried out the purest hot water, 1 st pure water washing, hang in and electrophoresis tank carries out electrophoresis painting film
2-5min, carries out twice washing afterwards, puts into drip-dry district, is then placed in electrophoresis stove carrying out curing process, solidification: temperature
180-200 DEG C, insulation 20-30 minute, hardness of paint film reaches more than 3H, unload after completing frame packaging.
Aluminium alloy height light anodic oxidation electrophoresis process the most according to claim 5, it is characterised in that: electrophoresis tank groove
Liquid acrylic resin component is: electrophoretic paint solid content: 3.5-4.5 grams per liter, pH:7.5-8.5, acid number: 3.0-4.0, amine number:
2.0-3.5, electrical conductivity: 350-1000us/cm.
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