CN104032348B - The anodizing tank of bar line aluminium alloy section bar and bright technique - Google Patents
The anodizing tank of bar line aluminium alloy section bar and bright technique Download PDFInfo
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- CN104032348B CN104032348B CN201410245736.5A CN201410245736A CN104032348B CN 104032348 B CN104032348 B CN 104032348B CN 201410245736 A CN201410245736 A CN 201410245736A CN 104032348 B CN104032348 B CN 104032348B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000007743 anodising Methods 0.000 title claims abstract description 18
- 210000005056 cell body Anatomy 0.000 claims abstract description 62
- 238000005406 washing Methods 0.000 claims abstract description 31
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 20
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 18
- 239000003153 chemical reaction reagent Substances 0.000 claims description 18
- 239000003792 electrolyte Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000006386 neutralization reaction Methods 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 239000001117 sulphuric acid Substances 0.000 claims description 9
- 235000011149 sulphuric acid Nutrition 0.000 claims description 9
- 239000013527 degreasing agent Substances 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 235000009508 confectionery Nutrition 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- 238000010306 acid treatment Methods 0.000 claims description 3
- 230000004075 alteration Effects 0.000 claims description 3
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 claims description 3
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 claims description 3
- 229910001453 nickel ion Inorganic materials 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 150000002500 ions Chemical group 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 235000012149 noodles Nutrition 0.000 description 4
- 238000012549 training Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 240000009023 Myrrhis odorata Species 0.000 description 1
- 235000007265 Myrrhis odorata Nutrition 0.000 description 1
- 235000012550 Pimpinella anisum Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- 238000005728 strengthening Methods 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The present invention relates to anodizing tank and the bright technique of bar line aluminium alloy section bar, device includes cell body, negative electrode electric installation and anode conducting device, and cell body side has the coil exchanger connected with base plate interior；Negative electrode electric installation is by recess and cell body clamping, anode conducting device in pairs and is respectively fixedly disposed at two opposed inner walls of cell body, the logarithm of anode conducting device is three right, anistree structure, interior hexagonal structure and interior five corner structures in being from top to bottom followed successively by hollow type, bright technique includes that self-inspection is added, oil removing is washed, chemistry light is washed, neutralized out light washing, anodic oxidation washing, sealing of hole washing and drying and undercarriage test package.Use the anodizing tank being applicable to bar line aluminium alloy section bar and the bright technique of technical scheme gained; electric conductivity is good; the concordance of bar line aluminium alloy Surface of profile quality can be effectively improved, effectively reduce waste of raw materials, be suitable for large-scale promotion application.
Description
Technical field
The present invention relates to bar line aluminium alloy shape extrusion technical field, a kind of line aluminium alloy section bar
Anodizing tank and bright technique.
Background technology
Modern society's decoration door and window or curtain wall mainly use aluminium alloy section structure material, the master of this section bar
If outward appearance is single and is chronically exposed in air and holds corrosion-prone shortcoming, the existence of this shortcoming makes it more
More it is difficult to the individual demand meeting Contemporary young user for decoration structural material.Close to optimize aluminum
The decorative effect of metal type material, strengthening its corrosion resistance and increase the service life, aluminium alloy extrusions typically will enter
Row surface processes.It is that aluminium alloy extrusions perfection squeezes body and in the China of modern society that the surface of aluminium alloy extrusions processes
Beautiful turning round, the method that conventional aluminium alloy section surface processes is anodizing, can by anodizing
Forming dense oxidation film at aluminium alloy section surface, the existence of this oxide-film can significantly improve aluminium alloy extrusions
Corrosion resistance, wearability and decoration performance.
The anode oxidative treatment method being applied to aluminium alloy extrusions in prior art refers to: at certain electrolyte
In, with aluminium alloy extrusions part as anode, with rustless steel or aluminum metal as negative electrode, at highly acid electrolytic solution
The middle process that aluminium alloy extrusions is carried out surface process.But the anodized of general aluminium alloy extrusions
Device connect with the card of aluminium alloy extrusions to be oxidized exist certain built on the sand or owing to equipment is to electrolysis
Liquid heating or the uneven problem of cooling, thus easily make the aluminium alloy extrusions that this equipment makes
Surface quality is uneven, it is difficult to meet the consumption demand of consumer.Therefore, research one is applicable to bar system
The anodizing tank of aluminium alloy extrusions is problem to be studied.
Summary of the invention
The technical problem to be solved is: overcome deficiency of the prior art, it is provided that one is applicable to
The anodizing tank of bar line aluminium alloy section bar, this device electric conductivity is good, is difficult to electric leakage, can be the most unified
And improve the surface quality of aluminium alloy extrusions.
The technical solution adopted for the present invention to solve the technical problems is: the anode of a kind of line aluminium alloy section bar
Oxidation trough, this anodic oxidation device includes cell body, negative electrode electric installation and anode conducting device, described
The trough rim end face of cell body has equally distributed recess, and cell body side has with base plate interior and connects
Coil exchanger；Negative electrode electric installation is by recess and cell body clamping, described negative electrode electric installation
For " 7 " type structure, the angle of the adjacent edge composition of " 7 " type structure is 90 °, horizontal edge in " 7 " type structure
Outer wall is enclosed with insulating barrier；Described anode conducting device in pairs and is respectively fixedly disposed at the biphase of cell body
To inwall, anode conducting device be bolted can bending structure, the logarithm of anode conducting device is
Three pairs, from top to bottom, its front end be followed successively by the hollow type that cross-sectional area is gradually increased anistree structure, interior six
Corner structure and interior five corner structures.
Further, in described " 7 " type structure, the front end of horizontal edge is connected with power cathode, for preventing by wire
Electrolyte forms dead angle in cell body, and is beneficial to the cleaning to cell body, described cell body interior
Wall turning is fillet structure.
Further, described in pairs and be respectively fixedly disposed at the anode conducting in two opposed inner walls of cell body
The end of device is connected externally in cell body by wire, and the height of described anode conducting device is less than electrolysis
The 4/5 of cell body inside wall height.
Further, described " 7 " type structure vertical edge is " 7 " with the vertical dimension of the trough rim of " 7 " type structure clamping
1.8-3 times of type structure vertical edge thickness, the making material of negative electrode electric installation is lead.
The bright technique of a kind of line aluminium alloy section bar, uses above-mentioned anodizing tank, and this bright technique has
Following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out surface examination, records same batch each section bar surface flatness, defect, hair
The two ends of aluminium alloy extrusions, after record, are respectively installed to the anode of oxidation unit by thorn and aberration level
On electric installation；
Further, if Surface of profile smoothness, defect, burr level are higher, can be to section bar before added
Surface mechanically polishes, it is therefore an objective to the mechanical line of product surface be reduced or eliminated, mechanical polishing degree according to
Customer demand is determined；For ensureing production safety, 1 Wan An training cell body every groove dress fine dried noodles amass and for 60-70 are
Most preferably, special circumstances must not exceed 60, and 1.2 Wan An training cell body every grooves dress fine dried noodles amass as 70-90,
Oxidation unit is when secondary utilizes, and the anode conducting device installing aluminium alloy extrusions two ends needs oxide film dissolving.
B. oil removing washing
Degreaser is injected in cell body, at normal temperatures aluminium alloy section surface is carried out oil removing, described remove
The composition of oil preparation is the sulfuric acid solution of 150-200g/L, washs to Surface of profile with clear water after processing 2-8min
PH be 4-7, degreaser and washes are discharged；
Further, in particular cases greasy dirt depending on Surface of profile processes the time surely.
C. chemistry light washing
According to the demand of product shading value, optional three acid or two acid treatment modes, specific practice is: will be mixed
Close medicament to inject in cell body, aluminium alloy section surface carries out processing 5-10min when 35-45 DEG C, so
PH with clear water washing to Surface of profile is 5-7 afterwards, confection and washes is discharged；Described mixing
The pH value of medicament is 3.0-3.5, and confection includes that etching agent that concentration is 8-10g/L and F concentration are
The ammonium acid fluoride of 30-40g/L, wherein, etching agent is two acid intermixtures or three acid intermixtures, two acid intermixtures
Phosphoric acid and the sulphuric acid that concentration is 9-12g/L for concentration is 55-65g/L obtain according to mass ratio 30:70 configuration,
Three acid intermixtures be concentration be that the phosphoric acid of 55-65g/L, concentration are the sulphuric acid of 9-12g/L and concentration is
The nitric acid of 4-5.5g/L is according to mass ratio (70-80): (15-20): (5-10) configures and obtain；
D. light washing is neutralized out
Neutralization reagent is injected in cell body, at normal temperatures aluminium alloy section surface is neutralized technique,
Described neutralization reagent is that concentration is the sulphuric acid of 180-200g/L or concentration is the nitric acid of 140-180g/L, processes
After 2-4min, the pH with clear water washing to Surface of profile is 3-5, neutralization reagent and washes is discharged；
Light reagent will be gone out inject in cell body, at normal temperatures aluminium alloy section surface will be gone out light technique,
Described go out light reagent be concentration be the nitric acid of 200-280g/L, process and wash to section bar with clear water after 2-4min
The pH on surface is 5-7, will go out light reagent and washes is discharged；
E. anodic oxidation washing
This step is a kind of water white film of the Surface Creation to goods, prevents the surface corrosion of material, film
The thickness of layer is that the demand according to client is adjusted, and thickness is formed generally by electric current density, voltage, tank liquor
Concentration and the impact of temperature；
Inject the electrolyte in cell body, when temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out oxygen
Metallization processes, described electrolyte is sulfuric acid solution and the aluminium ion composition of≤20g/L of 130-160g/L, processes
PH with clear water washing to Surface of profile is 5-7 afterwards, electrolyte and washes is discharged, processes time root
Depending on thickness, electric current density and the formula L=I T K of required oxide-film, wherein, the L in formula is oxygen
Changing film micron thickness, K is constant 0.28-0.3, and I is electric current density A/m2, T is oxidation the number of minutes；
After dress extension areal calculation is accurate, just can try to achieve the oxidization time needed for any thickness of oxidation film from above-mentioned formula；
Aluminium section bar should be avoided being immersed in for a long time in tank before anodic oxidation, and maximum duration is less than 3min, Yi Mianshui
Acid etch Surface of profile in groove；Through anodised product, in groove, residence time is less than 5min,
Prevent from affecting the quality of oxide-film；Requiring the bright product that brightness is high, electric current density selects 1-1.2A/dm2
It is advisable.
F. sealing of hole washing and drying
Pore-sealing liquid is injected in cell body, when temperature is 25 ± 2 DEG C, aluminium alloy section surface is sealed
Hole technique, described pore-sealing liquid is by the nickel ion that concentration is 0.8-1.5g/L and the fluorion group of 0.3-0.65g/L
Becoming, the pH value of pore-sealing liquid is 5.5-6.5, depending on the hole-sealing technology process time is according to the thickness of oxide-film, often
Individual film sealing of hole 1 minute, after being disposed, the pH with clear water washing to Surface of profile is 5-7.5, by pore-sealing liquid
And washes discharge, treat that aluminium alloy section surface is dried；
G. undercarriage test package
Aluminium alloy extrusions is taken off from anode conducting device, packaging warehouse-in after inspection record.
Undercarriage should be handled with care, notices that anti-damage, anti-collision deform, distance undercarriage 3m, is not allow for section bar
Touching wound sound, length is more than on the solarization bin can being placed on place without finishing mandrel process directly packaging of 4m,
Do not dry on the solarization bin that the product of (drip-dry) is placed on place；Product needed walks processing under making, it is desirable to first
After processing, packaging is then placed on product on " chassis ".
Beneficial effect: in technical scheme, cell body side has the dish connected with base plate interior
The setting of pipe heat exchanger, can accurately heat up to cell body or lower the temperature, facilitate electrolyte
Heating, cooling and the drying of bar line aluminium alloy section bar, the front end of anode conducting device interior anise from top to bottom
Structure, interior hexagonal structure and the setting of interior five corner structures, can facilitate anode conducting device different to be oxidized
The firm clamping of the bar line aluminium alloy section bar of cross sectional shape, improves the aluminium alloy extrusions stability when oxidation,
Thus reduce later stage percent defective；Negative electrode electric installation passes through recess and cell body clamping and the setting of insulating barrier,
The overall security of this device can be effectively improved；Anode conducting device in pairs and is respectively fixedly disposed at electrolysis bath
Two opposed inner walls of body, anode conducting device be the two-part that is bolted can the setting of bending structure,
Installation and the dismounting of bar type aluminium alloy section bar, beneficially aluminium alloy extrusions oxygen in homogeneous electrolyte can be facilitated
Change.
Use the anodizing tank being applicable to bar line aluminium alloy section bar of technical scheme gained, conduction
Functional, the concordance of bar line aluminium alloy Surface of profile quality can be effectively improved, effectively reduce raw material wave
Take, be suitable for large-scale promotion application.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings；
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the A-A profile in Fig. 1；
Fig. 3 is the B-B profile of Fig. 1；
1. cell body in figure, 11. leakage fluid drams, 12. coil exchangers, 2. negative electrode electric installation, 21.
Insulating barrier, 3. anode conducting device.
Detailed description of the invention
Presently in connection with accompanying drawing, the present invention is further illustrated.These accompanying drawings be the schematic diagram of simplification only with
The basic structure of the illustration explanation present invention, therefore it only shows the composition relevant with the present invention.
The anodizing tank of a kind of line aluminium alloy section bar as shown in Figure 1, 2, 3, this anodic oxidation device
Including cell body 1, negative electrode electric installation 2 and anode conducting device 3, the trough rim end of described cell body 1
Mask has equally distributed recess, cell body 1 bottom centre to have leakage fluid dram 11, leakage fluid dram 11 port
Having rotation gate, cell body 1 side has the coil exchanger 12 connected, dish with base plate interior
The inlet and outlet of pipe heat exchanger 12 is separately positioned on the two relative side of cell body 1 base plate, import
It is respectively arranged with valve with exit；Negative electrode electric installation 2 is by recess and cell body 1 clamping, described
Negative electrode electric installation 2 is " 7 " type structure, and the angle of the adjacent edge composition of " 7 " type structure is 90 °, " 7 "
In type structure, the outer wall of horizontal edge is enclosed with insulating barrier 21；Described anode conducting device 3 is fixed in pairs and respectively and is set
Put two opposed inner walls in cell body 1, anode conducting device 3 for be bolted can bending structure,
The logarithm of anode conducting device 3 is three right, and from top to bottom, its front end is followed successively by what cross-sectional area was gradually increased
Anistree structure, interior hexagonal structure and interior five corner structures in hollow type.
In " 7 " type structure, the front end of horizontal edge is connected with power cathode by wire, the inwall of cell body 1
Turning is fillet structure, and anode that is paired and that be respectively fixedly disposed in two opposed inner walls of cell body 1 is led
The end of electric installation 3 is connected externally in cell body 1 by wire, the height of described anode conducting device 3
Less than cell body 1 inside wall height 4/5.
" 7 " type structure vertical edge is " 7 " type structure vertical edge with the vertical dimension of the trough rim of " 7 " type structure clamping
1.8 times of thickness, the height of " 7 " type structure is less than the height of cell body 1 inwall, negative electrode electric installation
The making material of 2 is lead.
The bright technique of a kind of line aluminium alloy section bar, uses above-mentioned anodizing tank, and this bright technique has
Following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out surface examination, records same batch each section bar surface flatness, defect, hair
The two ends of aluminium alloy extrusions, after record, are respectively installed to the anode of oxidation unit by thorn and aberration level
On electric installation 3；
Further, if Surface of profile smoothness, defect, burr level are higher, can be to section bar before added
Surface mechanically polishes, it is therefore an objective to the mechanical line of product surface be reduced or eliminated, mechanical polishing degree according to
Customer demand is determined；For ensureing production safety, 1 Wan An training cell body 1 every groove dress fine dried noodles amass as 60-70
For most preferably, special circumstances must not exceed 60, and 1.2 Wan An training cell body 1 every groove dress fine dried noodles amass as 70-90
, oxidation unit is when secondary utilizes, and the anode conducting device installing aluminium alloy extrusions two ends needs deoxygenation
Change film.
B. oil removing washing
Degreaser is injected in cell body 1, at normal temperatures aluminium alloy section surface is carried out oil removing, described
The composition of degreaser is the sulfuric acid solution of 150g/L, washs the pH to Surface of profile with clear water after processing 6min
For 4-7, degreaser and washes are discharged；In particular cases the greasy dirt depending on Surface of profile processes the time surely.
C. chemistry light washing
According to the demand of product shading value, optional three acid or two acid treatment modes, specific practice is: will be mixed
Close medicament to inject in cell body 1, carry out aluminium alloy section surface when 35-45 DEG C processing 5-10min,
Then the pH with clear water washing to Surface of profile is 5-7, confection and washes is discharged；Described mixed
The pH value closing medicament is 3.0-3.5, and confection includes that etching agent that concentration is 10g/L and F concentration are
The ammonium acid fluoride of 30g/L, wherein, etching agent is two acid intermixtures or three acid intermixtures, and two acid intermixtures are dense
Spending phosphoric acid and the sulphuric acid that concentration is 12g/L for 65g/L to obtain according to mass ratio 30:70 configuration, three acid are mixed
Mixture be concentration be the phosphoric acid of 65g/L, concentration be the sulphuric acid of 12g/L and nitric acid that concentration is 5.5g/L according to
Mass ratio 80:15:10 configures and obtains；
D. light washing is neutralized out
Neutralization reagent is injected in cell body 1, at normal temperatures aluminium alloy section surface is neutralized technique,
Described neutralization reagent is that concentration is the sulphuric acid of 200g/L or concentration is the nitric acid of 180g/L, uses after processing 4min
Clear water washing is 3-5 to the pH of Surface of profile, neutralization reagent and washes is discharged；
Light reagent will be gone out inject in cell body 1, at normal temperatures aluminium alloy section surface will be gone out light technique,
Described go out light reagent be concentration be the nitric acid of 280g/L, process and wash to Surface of profile with clear water after 2-4min
PH be 5-7, light reagent and washes will be gone out and discharge；
E. anodic oxidation washing
This step is a kind of water white film of the Surface Creation to goods, prevents the surface corrosion of material, film
The thickness of layer is that the demand according to client is adjusted, and thickness is formed generally by electric current density, voltage, tank liquor
Concentration and the impact of temperature；
Inject the electrolyte in cell body 1, when temperature is 20 ± 2 DEG C, aluminium alloy section surface is carried out
Oxidation technology, described electrolyte is sulfuric acid solution and the aluminium ion composition of≤20g/L of 160g/L, after process
Be 5-7 with clear water washing to the pH of Surface of profile, electrolyte and washes discharged, process the time according to
Depending on the required thickness of oxide-film, electric current density and formula L=I T K, wherein, the L in formula is oxidation
Film micron thickness, K is constant 0.28-0.3, and I is electric current density A/m2, T is oxidation the number of minutes；
After dress extension areal calculation is accurate, just can try to achieve the oxidization time needed for any thickness of oxidation film from above-mentioned formula；
Aluminium section bar should be avoided being immersed in for a long time in tank before anodic oxidation, and maximum duration is less than 3min, Yi Mianshui
Acid etch Surface of profile in groove；Through anodised product, in groove, residence time is less than 5min,
Prevent from affecting the quality of oxide-film；Requiring the bright product that brightness is high, electric current density selects 1-1.2A/dm2
It is advisable.
F. sealing of hole washing and drying
Pore-sealing liquid is injected in cell body 1, when temperature is 25 ± 2 DEG C, aluminium alloy section surface is carried out
Hole-sealing technology, described pore-sealing liquid is made up of the fluorion of the nickel ion that concentration is 1.5g/L and 0.65g/L, envelope
The pH value of hole liquid is 5.5-6.5, and depending on the hole-sealing technology process time is according to the thickness of oxide-film, each film seals
1 minute, hole, after being disposed, the pH with clear water washing to Surface of profile is 5-7.5, by pore-sealing liquid and washing
Waste water is discharged, and treats that aluminium alloy section surface is dried；
G. undercarriage test package
Aluminium alloy extrusions is taken off from anode conducting device 3, packaging warehouse-in after inspection record.
Above-mentioned detailed description of the invention, only for technology design and the feature of the explanation present invention, its object is to allow familiar
The personage of technique will appreciate that present disclosure and is carried out, and can not limit the present invention's with this
Protection domain, all equivalence changes made according to spirit of the invention or modification, all should contain in the present invention
Protection domain in.
Claims (5)
1. the anodizing tank of a bar line aluminium alloy section bar, it is characterised in that: this anodic oxidation device includes
Cell body (1), negative electrode electric installation (2) and anode conducting device (3), described cell body (1)
Trough rim end face there is equally distributed recess, cell body (1) side has the dish connected with base plate interior
Pipe heat exchanger (12)；Negative electrode electric installation (2) passes through recess and cell body (1) clamping,
Described negative electrode electric installation (2) is " 7 " type structure, and the angle of the adjacent edge composition of " 7 " type structure is
90 °, in " 7 " type structure, the outer wall of horizontal edge is enclosed with insulating barrier (21)；Described anode conducting device (3)
In pairs and be respectively fixedly disposed at two opposed inner walls of cell body (1), anode conducting device (3) is logical
Cross bolted can bending structure, the logarithm of anode conducting device (3) is three right, from top to bottom, before it
End is anistree structure, interior hexagonal structure and interior five corner structures in being followed successively by the hollow type that cross-sectional area is gradually increased；
In described " 7 " type structure, the front end of horizontal edge is connected with power cathode by wire；
Described in pairs and be respectively fixedly disposed at the anode conducting device in two opposed inner walls of cell body (1)
(3) end is connected externally in cell body (1) by wire.
The anodizing tank of bar line aluminium alloy section bar the most according to claim 1, it is characterised in that: institute
The inwall turning stating cell body (1) is fillet structure.
The anodizing tank of bar line aluminium alloy section bar the most according to claim 1, it is characterised in that: institute
State the height of anode conducting device (3) less than the 4/5 of cell body (1) inside wall height.
The anodizing tank of bar line aluminium alloy section bar the most according to claim 1, it is characterised in that: institute
State " 7 " type structure vertical edge thick for " 7 " type structure vertical edge with the vertical dimension of the trough rim of " 7 " type structure clamping
1.8-3 times of degree.
5. the bright technique of a bar line aluminium alloy section bar, it is characterised in that: use claim 1-4 arbitrary
Anodizing tank described in Xiang, this bright technique has following steps:
A. self-inspection is added
Aluminium alloy extrusions is carried out surface examination, records same batch each section bar surface flatness, defect, hair
The two ends of aluminium alloy extrusions, after record, are respectively installed to the anode of oxidation unit by thorn and aberration level
On electric installation (3)；
B. oil removing washing
Degreaser is injected in cell body (1), at normal temperatures aluminium alloy section surface is carried out oil removing, institute
State the sulfuric acid solution that composition is 150-200g/L of degreaser, wash to section bar with clear water after processing 2-8min
The pH on surface is 4-7, degreaser and washes is discharged；
C. chemistry light washing
According to the demand of product shading value, optional three acid or two acid treatment modes, specific practice is: will be mixed
Close medicament to inject in cell body (1), carry out aluminium alloy section surface when 35-45 DEG C processing 5-10min,
Then the pH with clear water washing to Surface of profile is 5-7, confection and washes is discharged；Described mixed
The pH value closing medicament is 3.0-3.5, and confection includes that etching agent that concentration is 8-10g/L and F concentration are
The ammonium acid fluoride of 30-40g/L, wherein, etching agent is two acid intermixtures or three acid intermixtures, two acid intermixtures
Phosphoric acid and the sulphuric acid that concentration is 9-12g/L for concentration is 55-65g/L obtain according to mass ratio 30:70 configuration,
Three acid intermixtures be concentration be that the phosphoric acid of 55-65g/L, concentration are the sulphuric acid of 9-12g/L and concentration is
The nitric acid of 4-5.5g/L is according to mass ratio (70-80): (15-20): (5-10) configures and obtain；
D. light washing is neutralized out
Neutralization reagent is injected in cell body (1), at normal temperatures aluminium alloy section surface is neutralized work
Skill, described neutralization reagent is that concentration is the sulphuric acid of 180-200g/L or concentration is the nitric acid of 140-180g/L,
After process 2-4min, the pH with clear water washing to Surface of profile is 3-5, neutralization reagent and washes is discharged；
Light reagent will be gone out inject in cell body (1), at normal temperatures aluminium alloy section surface will be gone out light work
Skill, described in go out light reagent be concentration be the nitric acid of 200-280g/L, process and wash extremely with clear water after 2-4min
The pH of Surface of profile is 5-7, will go out light reagent and washes is discharged；
E. anodic oxidation washing
Inject the electrolyte in cell body (1), when temperature is 20 ± 2 DEG C, to aluminium alloy section surface
Carrying out oxidation technology, described electrolyte is sulfuric acid solution and the aluminium ion composition of≤20g/L of 130-160g/L,
After process, the pH with clear water washing to Surface of profile is 5-7, electrolyte and washes is discharged, during process
Between according to thickness, electric current density and the formula L=I T K of required oxide-film depending on, wherein, the L in formula
For oxide-film micron thickness, K is constant 0.28-0.3, and I is electric current density A/m2, T is oxidation the number of minutes；
F. sealing of hole washing and drying
Pore-sealing liquid is injected in cell body (1), when temperature is 25 ± 2 DEG C, to aluminium alloy section surface
Carrying out hole-sealing technology, described pore-sealing liquid is by the nickel ion that concentration is 0.8-1.5g/L and the fluorine of 0.3-0.65g/L
Ion forms, and the pH value of pore-sealing liquid is 5.5-6.5, and hole-sealing technology processes the time according to the thickness of oxide-film
Fixed, after being disposed, the pH with clear water washing to Surface of profile is 5-7.5, pore-sealing liquid and washes is arranged
Go out, treat that aluminium alloy section surface is dried；
G. undercarriage test package
Aluminium alloy extrusions is taken off from anode conducting device, packaging warehouse-in after inspection record.
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| CN107904643A (en) * | 2017-11-30 | 2018-04-13 | 福建旭晖铝业有限公司 | A kind of anodic oxidation aluminium section bar and its preparation process |
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