CN109628977A - A kind of aluminium alloy anode oxide electrolyte and anode oxidation process - Google Patents
A kind of aluminium alloy anode oxide electrolyte and anode oxidation process Download PDFInfo
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- CN109628977A CN109628977A CN201910015491.XA CN201910015491A CN109628977A CN 109628977 A CN109628977 A CN 109628977A CN 201910015491 A CN201910015491 A CN 201910015491A CN 109628977 A CN109628977 A CN 109628977A
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 56
- 230000003647 oxidation Effects 0.000 title claims abstract description 55
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003792 electrolyte Substances 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- VPTUPAVOBUEXMZ-UHFFFAOYSA-N (1-hydroxy-2-phosphonoethyl)phosphonic acid Chemical compound OP(=O)(O)C(O)CP(O)(O)=O VPTUPAVOBUEXMZ-UHFFFAOYSA-N 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 29
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 11
- 238000005530 etching Methods 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- -1 phospho Chemical class 0.000 claims description 6
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 229910001148 Al-Li alloy Inorganic materials 0.000 claims description 4
- 229940120146 EDTMP Drugs 0.000 claims description 4
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 150000003009 phosphonic acids Chemical class 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims 1
- 239000011295 pitch Substances 0.000 claims 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 claims 1
- 231100000614 poison Toxicity 0.000 abstract description 2
- 230000007096 poisonous effect Effects 0.000 abstract description 2
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 11
- 238000007743 anodising Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 3
- 239000001117 sulphuric acid Substances 0.000 description 3
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- FCVHBUFELUXTLR-UHFFFAOYSA-N [Li].[AlH3] Chemical compound [Li].[AlH3] FCVHBUFELUXTLR-UHFFFAOYSA-N 0.000 description 2
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000001989 lithium alloy Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910001250 2024 aluminium alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012876 topography 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
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to a kind of aluminium alloy anode oxide electrolyte and anode oxidation process, aluminium alloy anode oxide electrolyte includes the HEDP of 0.3 ~ 0.6 mol/L, and the temperature of anodic oxidation is 40 ~ 50 DEG C, and oxidation voltage is 80 ~ 120 V, anodic oxidation is carried out using constant-voltage method, oxidization time is 30 ~ 40 min.Aluminium alloy anode oxide electrolyte provided by the invention is environment-protecting and non-poisonous, wastewater treatment is simple, which can obtain 4 ~ 15 μm of anode oxide film.
Description
Technical field
The present invention relates to field of metal surface treatment, more particularly to a kind of aluminium alloy anode oxide technique.
Background technique
Aluminium alloy is especially navigating since density is small, specific strength is high, mechanics and processing performance are excellent and be widely used
The fields such as sky, automobile, building, always as one of most important structural material.However the natural oxide film one on aluminium alloy surface layer
As very thin (0.01 ~ 0.05 μm) and easily abrade, and the electrode potential of aluminium itself is very negative therefore connects with other dissimilar metals
It is easy that serious galvanic corrosion occurs as anode when touching, these are far from meeting industrial requirements, therefore aluminium alloy is using
Before must carry out it is appropriate surface treatment to improve its protective performance.
Currently, aluminum alloy surface processing technique is main the technical solution adopted is that first anodic oxidation, again sealing of hole or japanning.Often
The anode oxidation process seen has sulphuric acid anodizing, chromic acid anodizing and boric acid-anodizing process with sulfuric acid as major salt etc..Wherein, chromium
Sour anode oxidation membrane is fine and close, porosity is low, does not damage substrate fatigue strength, but Cr (VI) pollution environment cause its use by
Limitation, sulphuric acid anodizing can reduce the anti-fatigue performance of substrate and sulfuric acid concentration is larger therefore be unsuitable for the high aluminium of amount containing Cu
Alloy, boric acid-anodizing process with sulfuric acid as major salt are difficult to large-scale use.The present invention provides one kind and can satisfy the use demand and environmentally friendly
Aluminium alloy anode oxide electrolyte, and using the anodic oxidation electrolyte carry out anodic oxidation method, can be adapted for
The anodic oxidation of multi-series aluminium alloy can obtain 4 ~ 15 μm of anode oxide film on aluminium alloy surface layer, and membranous layer corrosion resistance is excellent.
Summary of the invention
To achieve the above object, the present invention adopts the following technical scheme: a kind of anodic oxidation electrolyte, anodic oxidation electrolysis
The pH of liquid is 1.5 ~ 2.5, the organic phospho acid or phosphonate of anodic oxidation electrolyte including 0.1 ~ 1.0 mol/L, organic phospho acid or
Phosphonate has no less than four acid hydroxy groups.
Further, organic phospho acid or phosphonate are aminotrimethylenephosphonic acid (ATMP), hydroxy ethylene diphosphonic acid
(HEDP), ethylenediamine tetramethylene phosphonic acid (EDTMP), diethylenetriamine pentamethylene fork phosphonic acids (DTPMP) and phosphate -1 2-,
Or mixtures thereof one of 2,4- butane tricarboxylates (PBTCA)
Preferably, anodic oxidation electrolyte includes the HEDP of 0.3 ~ 0.6 mol/L, and HEDP is a kind of environment-protecting and non-poisonous metal complex
Agent belongs to a kind of acid of four with following acid ionization constant acid hydroxy group:
HEDP has low pKa value, low pKa1 and pKa2 value especially as described above, therefore HEDP is suitable for preparing aluminium alloy
Anodic oxidation electrolyte.
Preparation includes the steps that the anodic oxidation electrolyte of the HEDP of 0.3 ~ 0.6 mol/L is as follows: S1. is to stainless steel electrolytic
The deionized water of half volume is added in slot, S2. is slowly added to HEDP aqueous solution (1 mol/L of 60% mass fraction
HEDP needs the HEDP aqueous solution of 60% mass fraction of 240 mL/L), it stirs while adding to being completely dissolved；S3. sodium hydroxide is used
Or potassium hydroxide solution adjusts pH to 1.8 ~ 2.2, adds water to prescribed volume；S4. 24 h are stood.The anodic oxidation electrolysis newly configured
Liquid will can be used through 24 rear h of overcuring.
The present invention also provides a kind of aluminium alloy anode oxide technique, anodic oxidation electrolyte includes 0.3 ~ 0.6 mol/L's
Aluminium alloy is successively passed through alkaline etching, hot water wash, cold water before anodized and washes, goes out light, washing process by HEDP.
The Alkaline etchant that alkaline etching uses is prepared by 60 ~ 100 g/L sodium hydroxides, 5 ~ 6 g/L vulcanized sodium and deionized water,
Aluminium alloy to anodized is put into 3 ~ 5min of processing in 50 ~ 60 DEG C of Alkaline etchant.Aluminium alloy after alkaline etching successively passes through
Overheat washing, cold water are put immediately into 30 ~ 60 s of immersion in the nitric acid light-emitting solution of 30% ~ 50% volumetric concentration and carry out out at light after washing
Reason.The aluminium alloy after light will carry out oxidation processes immediately after washing process out, and interval time no more than 30min, otherwise can
Influence the quality of anodic oxidation.
Aluminium alloy after pre-treatment is placed in 40 ~ 50 DEG C of anodic oxidation electrolyte pass to direct current, with constant-voltage method into
Row anodized, cathode can use stainless steel.After anodized, aluminium alloy is thoroughly cleaned through deionized water, cold
Wind is dry.The anode oxide film of aluminum alloy surface with a thickness of 4 ~ 15 μm after anodized.
Further, for 1 line aluminium alloy, 6 line aluminium alloys, 7 line aluminium alloys or Al-Li system alloy, in anodic oxidation
Anodic oxidation voltage is specifically first promoted to 90 ~ 120V in 5min, later constant pressure for step boosting method by the constant-voltage method used
30~35min。
Further, for 2 line aluminium alloys, the constant-voltage method that need to be used in anodic oxidation is substep boosting method, specifically
Anodic oxidation voltage is first promoted to 80V in 5min, 20 ~ 25min is maintained, later again promotes anodic oxidation voltage in 5min
To 120V, then maintain 5 ~ 10min.
Detailed description of the invention
The invention will be further described for attached drawing, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.
Fig. 1 is the surface topography (a) and Cross Section Morphology of the resulting 1060 aluminum alloy surface HEDP anode oxide film of embodiment 1
(b)。
Fig. 2 is the dynamic electricity of the resulting 7075 aluminum alloy surface HEDP oxidation film of embodiment 4 and sulfuric acid, chromic acid anodizing film
Bit polarization curve.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment 1
2 L of anodic oxidation electrolyte of HEDP of the configuration including 0.6 mol/L, steps are as follows:
S1. the deionized water of 1 L or so is added into stainless steel electrolytic cell；
S2. the HEDP aqueous solution of 60% mass fraction of 290 mL is slowly added to after, it is stirring while adding to being completely dissolved；
S3. pH to 1.8 is adjusted with the KOH solution of 1mol/L, adds water to 2 L later；
S4. 24 h are stood.
Aluminium alloy anode oxide processing step is as follows:
A1. workpiece is put into 50 DEG C of Alkaline etchant and successively washes through hot water wash, cold water after processing 3min, and wherein Alkaline etchant is by 60 g/L
Sodium hydroxide, 5 g/L vulcanized sodium and deionized water are prepared.
Workpiece after alkaline etching is put immediately into the nitric acid light-emitting solution of 30% volumetric concentration and impregnates 30 s, is washed later
Processing.
Workpiece after light out is placed in the HEDP electrolyte of 0.6 mol/L of preparation, passes to direct current at 40 DEG C,
Oxidation voltage rises to 90 V, and constant pressure handles 30 min later, and workpiece is thoroughly cleaned through deionized water after oxidation, cold wind drying.
After above-mentioned process, thick about 5 μm of anode oxide film can be formed in 1060 aluminum alloy surfaces, as shown in Figure 1,
The microstructure of the film layer is Porosity anodic oxide film, and aperture is 80 ~ 90 nm.
Embodiment 2
1060 aluminium alloy anode oxide processing steps are as follows:
A1. workpiece is put into 60 DEG C of Alkaline etchant and successively washes through hot water wash, cold water after processing 5min, and wherein Alkaline etchant is by 100g/L
Sodium hydroxide, 6 g/L vulcanized sodium and deionized water are prepared.
Workpiece after alkaline etching is put immediately into the nitric acid light-emitting solution of 50% volumetric concentration and impregnates 60 s, is washed later
Processing.
Workpiece after light out is placed in the HEDP electrolyte of 0.6 mol/L of preparation, passes to direct current at 50 DEG C,
Oxidation voltage rises to 120 V, and constant pressure handles 35 min later, and workpiece is thoroughly cleaned through deionized water after oxidation, cold wind drying.
It, can be in the anode oxide film of 1060 aluminum alloy surfaces, 12 ~ 15 μ m-thicks of formation after above-mentioned process.
Embodiment 3
2 L of anodic oxidation electrolyte of HEDP of the configuration including 0.3mol/L, steps are as follows:
S1. the deionized water of 1 L or so is added into stainless steel electrolytic cell；
S2. the HEDP aqueous solution of 60% mass fraction of 145mL is slowly added to after, it is stirring while adding to being completely dissolved；
S3. pH to 2.2 is adjusted with the NaOH solution of 1mol/L, adds water to 2 L later；
S4. 24 h are stood.
Aluminium alloy anode oxide processing step is as follows:
A1. workpiece is put into 55 DEG C of Alkaline etchant and successively washes through hot water wash, cold water after processing 4min, and wherein Alkaline etchant is by 80 g/L
Sodium hydroxide, 5.5 g/L vulcanized sodium and deionized water are prepared.
Workpiece after alkaline etching is put immediately into the nitric acid light-emitting solution of 40% volumetric concentration and impregnates 45 s, is washed later
Processing.
Workpiece after light out is placed in the HEDP electrolyte of the 0.3mol/L of preparation, direct current, oxygen are passed at 40 DEG C
Change voltage and be first promoted to 80V, oxidation voltage is promoted to 120V again after maintaining 20 ~ 25min, then maintain 10min, workpiece after oxidation
It is thoroughly cleaned through deionized water, cold wind drying.
It, can be in the anode oxide film of 2024 aluminum alloy surfaces, 4 ~ 5 μ m-thicks of formation after above-mentioned process.
Embodiment 4
2 L of anodic oxidation electrolyte of HEDP of the configuration including 0.5mol/L, steps are as follows:
S1. the deionized water of 1 L or so is added into stainless steel electrolytic cell；
S2. the HEDP aqueous solution of 60% mass fraction of 240mL is slowly added to after, it is stirring while adding to being completely dissolved；
S3. pH to 2.0 is adjusted with the NaOH solution of 1mol/L, adds water to 2 L later；
S4. 24 h are stood.
Aluminium alloy anode oxide processing step is as follows:
A1. workpiece is put into 55 DEG C of Alkaline etchant and successively washes through hot water wash, cold water after processing 4min, and wherein Alkaline etchant is by 90 g/L
Sodium hydroxide, 6 g/L vulcanized sodium and deionized water are prepared.
Workpiece after alkaline etching is put immediately into the nitric acid light-emitting solution of 45% volumetric concentration and impregnates 50 s, is washed later
Processing.
Workpiece after light out is placed in the HEDP electrolyte of the 0.5mol/L of preparation, direct current, oxygen are passed at 45 DEG C
Change voltage increase to 100V, constant pressure handles 35 min, and workpiece is thoroughly cleaned through deionized water after oxidation, cold wind drying.
It, can be in the anode oxide film of 7075 aluminum alloy surfaces, 10 ~ 12 μ m-thicks of formation after above-mentioned process.Electrokinetic potential
Polarization curve is as shown in Figure 2, the results showed that, the corrosion resistance of 7075 aluminium alloys, HEDP oxygen greatly improved in HEDP anode oxide film
The corrosion resistance for changing film is suitable with chromic acid anodizing film, slightly better than the sulphuric acid oxidation coating of same thickness.
Embodiment 5
Steps are as follows for aluminium lithium alloy anodized:
A1. workpiece is put into 60 DEG C of Alkaline etchant and successively washes through hot water wash, cold water after processing 5min, and wherein Alkaline etchant is by 70 g/L
Sodium hydroxide, 5 g/L vulcanized sodium and deionized water are prepared.
Workpiece after alkaline etching is put immediately into the nitric acid light-emitting solution of 40% volumetric concentration and impregnates 40 s, is washed later
Processing.
Workpiece after light out is placed in the HEDP electrolyte of the 0.5mol/L of preparation, direct current, oxygen are passed at 45 DEG C
Change voltage increase to 90V, constant pressure handles 30min, and workpiece is thoroughly cleaned through deionized water after oxidation, cold wind drying.
After above-mentioned process, the anode oxide film of 8 ~ 10 μ m-thicks can be formed on aluminium lithium alloy surface.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of anodic oxidation electrolyte, it is characterised in that: the pH of the anodic oxidation electrolyte is 1.5 ~ 2.5, the anode
Oxidation electrolyte includes the organic phospho acid or phosphonate of 0.1 ~ 1.0 mol/L, and the organic phospho acid or phosphonate have no less than
Four acid hydroxy groups.
2. a kind of anodic oxidation electrolyte according to claim 1, it is characterised in that: the organic phospho acid or phosphonate are ammonia
Base trimethylene phosphonic (ATMP), hydroxy ethylene diphosphonic acid (HEDP), ethylenediamine tetramethylene phosphonic acid (EDTMP), divinyl
Triamine pentamethylene pitches phosphonic acids (DTPMP) and 2- phosphate -1,2, one of 4- butane tricarboxylate (PBTCA) or its mixing
Object.
3. a kind of anodic oxidation electrolyte according to claim 2, it is characterised in that: the anodic oxidation electrolyte includes
The HEDP of 0.3 ~ 0.6 mol/L.
4. configuring a kind of method of anodic oxidation electrolyte described in claim 3, include the following steps:
S1. the deionized water of half volume is added into electrolytic cell；
S2. it is added the HEDP aqueous solution of 60% mass fraction, stirring is to being completely dissolved；
S3. pH to 1.8 ~ 2.2 is adjusted with sodium hydroxide or potassium hydroxide solution, adds water to prescribed volume；
S4. 24 h are stood.
5. a kind of method of the anodic oxidation of aluminium alloy, includes the following steps:
A1., aluminium alloy is placed in alkaline etching in 50 ~ 60 DEG C of Alkaline etchant and handles 3 ~ 5min, then successively hot water wash, cold water are washed；
A2. aluminium alloy is placed in light-emitting solution and carries out out 30 ~ 60 s of light processing, then washing process；
A3. aluminium alloy is placed in 40 ~ 50 DEG C of anodic oxidation electrolyte as claimed in claim 3, direct current is passed to, with perseverance
Platen press carries out anodized.
6. a kind of method of the anodic oxidation of aluminium alloy according to claim 5, it is characterised in that: the Alkaline etchant includes 60
~ 100 g/L sodium hydroxides and 5 ~ 6 g/L vulcanized sodium.
7. a kind of method of the anodic oxidation of aluminium alloy according to claim 5, it is characterised in that: the light-emitting solution includes
The nitric acid of 30% ~ 50% volumetric concentration.
8. a kind of method of the anodic oxidation of aluminium alloy according to claim 7, it is characterised in that: the step A2 and step
The interval time of A3 is no more than 30min.
9. a kind of method of the anodic oxidation of aluminium alloy according to claim 5, it is characterised in that: the aluminium alloy is 1 system
One of aluminium alloy, 6 line aluminium alloys, 7 line aluminium alloys or Al-Li system alloy, the constant-voltage method are step boosting method, are included in
It is brought the voltage up in 5min to 90 ~ 120V and maintains 30 ~ 35min.
10. a kind of method of the anodic oxidation of aluminium alloy according to claim 9, it is characterised in that: the aluminium alloy is 2 systems
Aluminium alloy, the constant-voltage method is substep boosting method, including is brought the voltage up in 5min to 80V, is existed again after maintaining 20 ~ 25min
It is brought the voltage up in 5min to 120V and maintains 5 ~ 10min.
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| CN201910015491.XA Pending CN109628977A (en) | 2019-01-08 | 2019-01-08 | A kind of aluminium alloy anode oxide electrolyte and anode oxidation process |
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| CN110344095A (en) * | 2019-08-06 | 2019-10-18 | 南昌航空大学 | The preparation method and high strength alumin ium alloy workpiece of a kind of high strength alumin ium alloy anodic oxidation electrolyte and high strength alumin ium alloy anode oxide film |
| CN111485268A (en) * | 2020-04-17 | 2020-08-04 | 大连交通大学 | Preparation method for rapidly preparing alumina template by using 1060 aluminum sheet at high temperature |
| CN113235144A (en) * | 2021-04-22 | 2021-08-10 | 华东交通大学 | Method for preparing anodic aluminum oxide on aluminum surface |
| CN113755922A (en) * | 2020-07-29 | 2021-12-07 | 英迪那米(徐州)半导体科技有限公司 | Preparation process of aluminum alloy anodic oxidation electrolyte |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344095A (en) * | 2019-08-06 | 2019-10-18 | 南昌航空大学 | The preparation method and high strength alumin ium alloy workpiece of a kind of high strength alumin ium alloy anodic oxidation electrolyte and high strength alumin ium alloy anode oxide film |
| CN110344095B (en) * | 2019-08-06 | 2021-02-26 | 南昌航空大学 | High-strength aluminum alloy anodic oxidation electrolyte, preparation method of high-strength aluminum alloy anodic oxidation film and high-strength aluminum alloy workpiece |
| CN111485268A (en) * | 2020-04-17 | 2020-08-04 | 大连交通大学 | Preparation method for rapidly preparing alumina template by using 1060 aluminum sheet at high temperature |
| CN113755922A (en) * | 2020-07-29 | 2021-12-07 | 英迪那米(徐州)半导体科技有限公司 | Preparation process of aluminum alloy anodic oxidation electrolyte |
| CN113235144A (en) * | 2021-04-22 | 2021-08-10 | 华东交通大学 | Method for preparing anodic aluminum oxide on aluminum surface |
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Application publication date: 20190416 |