CN108660495A - A kind of aluminium alloy polychrome finish anticorrosive treatment process - Google Patents
A kind of aluminium alloy polychrome finish anticorrosive treatment process Download PDFInfo
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- CN108660495A CN108660495A CN201810275420.9A CN201810275420A CN108660495A CN 108660495 A CN108660495 A CN 108660495A CN 201810275420 A CN201810275420 A CN 201810275420A CN 108660495 A CN108660495 A CN 108660495A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims abstract description 40
- PLXMOAALOJOTIY-FPTXNFDTSA-N Aesculin Natural products OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](O)[C@H]1Oc2cc3C=CC(=O)Oc3cc2O PLXMOAALOJOTIY-FPTXNFDTSA-N 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 230000003647 oxidation Effects 0.000 claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 21
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 229920003180 amino resin Polymers 0.000 claims description 2
- PYRZPBDTPRQYKG-UHFFFAOYSA-N cyclopentene-1-carboxylic acid Chemical compound OC(=O)C1=CCCC1 PYRZPBDTPRQYKG-UHFFFAOYSA-N 0.000 claims description 2
- 238000005555 metalworking Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 238000010422 painting Methods 0.000 claims 1
- 238000007517 polishing process Methods 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 241000675108 Citrus tangerina Species 0.000 abstract description 7
- 230000004075 alteration Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000012188 paraffin wax Substances 0.000 abstract 1
- 239000003086 colorant Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007540 photo-reduction reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/20—Electrolytic after-treatment
- C25D11/22—Electrolytic after-treatment for colouring layers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention relates to a kind of aluminium alloy polychrome finish anticorrosive treatment process, include the following steps：Paraffin removal, oil removing, electrobrightening, striping, ash disposal, oxidation, hot water wash, electrolysis organic coating and baking-curing.Thoroughly solve the problems, such as that the long-standing tangerine line of colorful aluminium alloy and aberration are unstable, aluminum alloy surface smoothes out smooth, colour stable, and consistency is good, it is substantially not present aberration and tangerine line, with splendid visual decorative effect, spraying process system easy to control the quality, part qualification rate height, waste of material is few, the Corrosion Protection for greatly improving aluminium alloy, improves production efficiency and product quality, is primarily adapted for use in the bright panel of aluminium alloy for preparing automobile, aerospace, 3C Product.
Description
Technical field
The present invention relates to a kind of aluminium alloy polychrome finish anticorrosive treatment process.
Background technology
Current automobile, aerospace, on 3C Product, external ornament application is increasingly wider, more and more various, to the more of color
Sample, to high intensity, high rotproofness, the aluminium section bar of environment-friendly type, plank demand can be increasing.It is main at present in 3C industries
If being painted using organic dyestuff, but in outdoor application, it is easy to fade, cannot promotes the use of, cannot be satisfied existing
Automobile, aerospace, the requirement of 3C Product.
Aluminium product surface is happened at high alkalinity media contact in carwash, and most of car-cleaning agents currently on the market are
Alkalinity, pH are more than 9.0.It is very easy to the aluminium product of the frequent conventional surface process of corrosion, the ratio of aluminum material in automobile making
Increasingly increase and its be current novel car body important component.Therefore auto industry has had been sent from for surface treatment
Aluminium parts alkaline stability high quality requirement, if meet the quality requirement by specific testing standard to supervise.Through
The appearance surfaces smooth features unobvious of colorful aluminium surface this kind of product of spraying, it is desirable that smooth out very much smooth and to have very high
Visual decorative effect, the thin and narrow length of part raw material, spraying process quality is not easy to control, color inconsistency easily occurs, and
With not equal tangerine line.Cause part qualification rate very low, manufacturing cost is high, and waste is serious, is mainly reflected in appearance orange peel and face
The defects of color is unstable.
Invention content
In view of this, that the object of the present invention is to provide a kind of antiseptic properties is good, surface smooth-going is smooth, and the aluminium of colour stable closes
Golden polychrome finish anticorrosive treatment process.
The present invention is realized using following scheme：A kind of aluminium alloy polychrome finish anticorrosive treatment process, includes the following steps：
（1）Removing oil-removing wax：Al alloy parts are placed in removing oil-removing wax solution and carry out ultrasonic cleaning；（2）Electrobrightening：By aluminium
Alloy workpiece is placed in electrolytic polishing liquid and is processed by shot blasting；（3）Striping：Al alloy parts are placed in stripping solution
Film process is carried out under room temperature；（4）Ash disposal：Al alloy parts are placed in ash disposal solution and carry out ash disposal processing at normal temperatures；
（5）Oxidation：Al alloy parts are placed in oxidation solution and carry out oxidation processes, form oxidation film layer；（6）Hot water wash：By aluminium
Alloy workpiece is placed carries out hot water wash processing in the hot water；（7）It is electrolysed organic coating：Al alloy parts are placed on coloured electrolysis
It is electrolysed organic coating in organic coating solution；（8）Baking-curing：Al alloy parts are put into curing oven and carry out baking-curing.
Further, step（1）In, removing oil-removing wax process temperature is 45 DEG C ~ 75 DEG C, and the time is 2 ~ 6min, removing oil-removing wax
A concentration of 35 ~ 65g/l of solution, Al alloy parts need pure water to wash secondary after completion removing oil-removing wax processing.
Further, step（2）In, electrobrightening process temperature is 45 DEG C ~ 65 DEG C, and the time is 10 ~ 20min, and electrolysis is thrown
It is 20 ~ 40V that DC voltage is passed through in photoreduction process, and the electrolytic polishing liquid is made of sulfuric acid, phosphoric acid, Al ions, and wherein sulfuric acid is dense
Degree is 300-500g/l, and phosphoric acid concentration 600-1000g/l, Al ion concentration is 20-50g/l, completes electrobrightening processing
Al alloy parts need pure water to wash three times afterwards；Step（3）In, striping processing time is 30 ~ 60s, and stripping solution is that sodium hydroxide is molten
Liquid, it is secondary that completion goes after film process Al alloy parts that pure water is needed to wash.
Further, step（4）In, ash disposal processing time is 5min, and ash disposal solution is sulfuric acid solution, completes ash disposal processing
Al alloy parts need pure water to wash secondary afterwards；Step（5）In, oxidation process temperature is 18 DEG C ~ 23 DEG C, and the time is 20 ~ 30min, oxygen
It is 12 ~ 16V to change the DC voltage being passed through in the process, and oxidation solution is sulfuric acid solution, and sulfuric acid concentration 160-210g/l is completed
Al alloy parts need pure water to wash four times after oxidation processes；Step（6）In, the hot water be deionized water, hot water temperature be 75 DEG C ~
85 DEG C, the hot water wash time is 2 ~ 7min, and Al alloy parts need pure water to wash once after completing hot water wash.
Further, step（7）In, electrolysis organic coating process temperature is 20 DEG C ~ 25 DEG C, and voltage is 80V ~ 150V, when
Between be 2 ~ 5min, the coloured electrolysis organic coating solution is made of acrylic resin, amino resins, mill base and pure water, completes
Al alloy parts need pure water to wash three times after the electrolysis of organic coating；Step（8）In, baking temperature is 160 DEG C ~ 190 DEG C, when baking
Between be 30 ~ 40min.
Compared with prior art, the invention has the advantages that：Aluminium alloy polychrome finish anti-corrosion treatment of the present invention
Technique solves the problems, such as that the long-standing tangerine line of colorful aluminium alloy and aberration are unstable, and aluminum alloy surface smoothes out smooth, color
Stablize, consistency is good, is substantially not present aberration and tangerine line, have splendid visual decorative effect, spraying process system easy to control the quality,
Part qualification rate is high, and waste of material is few, greatly improves the Corrosion Protection of aluminium alloy, improves production efficiency and product quality,
It is primarily adapted for use in the bright panel of aluminium alloy for preparing automobile, aerospace, 3C Product.
It to make the objectives, technical solutions, and advantages of the present invention more comprehensible, below will be by specific embodiment, to this
Invention is described in further detail.
Description of the drawings
Specific implementation mode
The present invention is realized using following scheme：A kind of aluminium alloy polychrome finish anticorrosive treatment process, includes the following steps：
（1）Removing oil-removing wax：Al alloy parts are placed in removing oil-removing wax solution and carry out ultrasonic cleaning；（2）Electrobrightening：By aluminium
Alloy workpiece is placed in electrolytic polishing liquid and is processed by shot blasting；（3）Striping：Al alloy parts are placed in stripping solution
Film process is carried out under room temperature；（4）Ash disposal：Al alloy parts are placed in ash disposal solution and carry out ash disposal processing at normal temperatures；
（5）Oxidation：Al alloy parts are placed in oxidation solution and carry out oxidation processes, form oxidation film layer；（6）Hot water wash：By aluminium
Alloy workpiece is placed carries out hot water wash processing in the hot water；（7）It is electrolysed organic coating：Al alloy parts are placed on coloured electrolysis
It is electrolysed organic coating in organic coating solution；（8）Baking-curing：Al alloy parts are put into curing oven and carry out baking-curing；
Aluminium alloy polychrome finish anticorrosive treatment process of the present invention can thoroughly solve the colorful long-standing tangerine line of aluminium alloy in industry
The unstable problem with aberration can power on as needed in Al alloy parts and solve a variety of colors, and aluminum alloy surface smooth-going is smooth,
Colour stable not fugitive color, consistency is good, is substantially not present aberration and tangerine line, has splendid visual decorative effect, spray coated
Journey system easy to control the quality, part qualification rate is high, and waste of material is few, greatly improves the Corrosion Protection of aluminium alloy, improves production effect
Rate and product quality are primarily adapted for use in the bright panel of aluminium alloy for preparing automobile, aerospace, 3C Product.
In the present embodiment, step（1）In, removing oil-removing wax process temperature be 45 DEG C ~ 75 DEG C, preferably 60 DEG C, the time be 2 ~
6min, preferably 4min, a concentration of 35 ~ 65g/l of removing oil-removing wax solution, preferably 50g/l complete aluminium alloy after removing oil-removing wax processing
It is secondary that workpiece needs pure water to wash.
In the present embodiment, step（2）In, electrobrightening process temperature be 45 DEG C ~ 65 DEG C, preferably 55 DEG C, the time 10
~ 20min, preferably 15min, it is 20 ~ 40V that DC voltage is passed through during electrobrightening, preferably 28V, the electrolytic polishing liquid by
Sulfuric acid, phosphoric acid, Al ions composition, wherein sulfuric acid concentration are 300-500g/l, preferably 4005g/l, phosphoric acid concentration 600-
1000g/l, preferably 8005g/l, Al ion concentrations are 20-50g/l, preferably 355g/l, and aluminium closes after completing electrobrightening processing
Metal working part needs pure water to wash three times.
In the present embodiment, step（3）In, striping processing time is 30 ~ 60s, and preferably 50s, stripping solution is hydroxide
Sodium solution, it is secondary that completion goes after film process Al alloy parts that pure water is needed to wash.
In the present embodiment, step（4）In, ash disposal processing time is 5min, and ash disposal solution is sulfuric acid solution, completes ash disposal
Al alloy parts need pure water to wash secondary after processing.
In the present embodiment, step（5）In, oxidation process temperature be 18 DEG C ~ 23 DEG C, preferably 20 DEG C, the time be 20 ~
30min, preferably 25min, the DC voltage being passed through in oxidation process are 12 ~ 16V, and preferably 15V, oxidation solution is sulfuric acid solution,
Sulfuric acid concentration is 160-210g/l, preferably 1805g/l, and Al alloy parts need pure water to wash four times after completing oxidation processes.
In the present embodiment, step（6）In, the hot water be deionized water, hot water temperature be 75 DEG C ~ 85 DEG C, preferably 80
DEG C, the hot water wash time is 2 ~ 7min, preferably 5min, and Al alloy parts need pure water to wash once after completing hot water wash.
Further, step（7）In, electrolysis organic coating process temperature be 20 DEG C ~ 25 DEG C, preferably 22 DEG C, voltage 80V
~ 150V, preferably 120V, time are 2 ~ 5min, preferably 4min, and the coloured electrolysis organic coating solution is by acrylic resin, ammonia
Base resin, mill base and pure water composition, using the mill base of different colours, can be in electrical contact the organic coating of different colours, complete
Al alloy parts need pure water to wash three times after the electrolysis of organic coating.
In the present embodiment, step（8）In, baking temperature be 160 DEG C ~ 190 DEG C, preferably 170 DEG C, baking time be 30 ~
40min, preferably 35min.
Above-listed preferred embodiment, has been further described the object, technical solutions and advantages of the present invention, is answered
Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of aluminium alloy polychrome finish anticorrosive treatment process, it is characterised in that：Include the following steps：（1）Removing oil-removing wax：It will
Al alloy parts, which are placed in removing oil-removing wax solution, carries out ultrasonic cleaning；（2）Electrobrightening：Al alloy parts are placed on
It is processed by shot blasting in electrolytic polishing liquid；（3）Striping：Al alloy parts are placed in stripping solution and carry out striping at normal temperatures
Processing；（4）Ash disposal：Al alloy parts are placed in ash disposal solution and carry out ash disposal processing at normal temperatures；（5）Oxidation：Aluminium is closed
Metal working part is placed in oxidation solution and carries out oxidation processes, forms oxidation film layer；（6）Hot water wash：Al alloy parts are placed on
Hot water wash processing is carried out in hot water；（7）It is electrolysed organic coating：Al alloy parts are placed in coloured electrolysis organic coating solution
It is electrolysed organic coating；（8）Baking-curing：Al alloy parts are put into curing oven and carry out baking-curing.
2. aluminium alloy polychrome finish anticorrosive treatment process according to claim 1, it is characterised in that：Step（1）In, it removes
Oily wax removing process temperature is 45 DEG C ~ 75 DEG C, and the time is 2 ~ 6min, a concentration of 35 ~ 65g/l of removing oil-removing wax solution, completes oil removing
Except to need pure water to wash secondary for Al alloy parts after Lasaxing Oilfield.
3. aluminium alloy polychrome finish anticorrosive treatment process according to claim 1, it is characterised in that：Step（2）In, electricity
It is 45 DEG C ~ 65 DEG C to solve polishing process temperature, and the time is 10 ~ 20min, and it is 20 ~ 40V that DC voltage is passed through during electrobrightening,
The electrolytic polishing liquid is made of sulfuric acid, phosphoric acid, Al ions, and wherein sulfuric acid concentration is 300-500g/l, and phosphoric acid concentration is
600-1000g/l, Al ion concentration are 20-50g/l, and Al alloy parts need pure water to wash three times after completing electrobrightening processing；
Step（3）In, striping processing time is 30 ~ 60s, and stripping solution is sodium hydroxide solution, and aluminium alloy work after film process is gone in completion
It is secondary that part needs pure water to wash.
4. aluminium alloy polychrome finish anticorrosive treatment process according to claim 1, it is characterised in that：Step（4）In, it removes
Grey processing time is 5min, and ash disposal solution is sulfuric acid solution, and Al alloy parts need pure water to wash secondary after completion ash disposal processing；Step
（5）In, oxidation process temperature is 18 DEG C ~ 23 DEG C, and the time is 20 ~ 30min, the DC voltage being passed through in oxidation process is 12 ~
16V, oxidation solution are sulfuric acid solution, and sulfuric acid concentration 160-210g/l, Al alloy parts need pure water to wash after completing oxidation processes
Four times；Step（6）In, the hot water is deionized water, and hot water temperature is 75 DEG C ~ 85 DEG C, and the hot water wash time is 2 ~ 7min, is completed
Al alloy parts need pure water to wash once after hot water wash.
5. aluminium alloy polychrome finish anticorrosive treatment process according to claim 1, it is characterised in that：Step（7）In, electricity
It is 20 DEG C ~ 25 DEG C to solve organic coating process temperature, and voltage is 80V ~ 150V, and the time is 2 ~ 5min, the coloured organic painting of electrolysis
Layer solution is made of acrylic resin, amino resins, mill base and pure water, and Al alloy parts need to be pure after completing the electrolysis of organic coating
Washing is three times；Step（8）In, baking temperature is 160 DEG C ~ 190 DEG C, and baking time is 30 ~ 40min.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111663025A (en) * | 2020-06-09 | 2020-09-15 | 福耀汽车铝件(福建)有限公司 | Aging treatment method of aluminum alloy bright decorative strip, vehicle body bright decorative strip and aging equipment |
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2018
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| CN111663025A (en) * | 2020-06-09 | 2020-09-15 | 福耀汽车铝件(福建)有限公司 | Aging treatment method of aluminum alloy bright decorative strip, vehicle body bright decorative strip and aging equipment |
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