CN109423675A - A method of electrolyte, fine aluminium part surface anodization for fine aluminium part surface anodization - Google Patents
A method of electrolyte, fine aluminium part surface anodization for fine aluminium part surface anodization Download PDFInfo
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- CN109423675A CN109423675A CN201710752557.4A CN201710752557A CN109423675A CN 109423675 A CN109423675 A CN 109423675A CN 201710752557 A CN201710752557 A CN 201710752557A CN 109423675 A CN109423675 A CN 109423675A
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- fine aluminium
- aluminium part
- part surface
- surface anodization
- electrolyte
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- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000002048 anodisation reaction Methods 0.000 title claims abstract description 41
- 239000003792 electrolyte Substances 0.000 title claims abstract description 31
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 48
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 28
- 235000011187 glycerol Nutrition 0.000 claims abstract description 14
- VZDYWEUILIUIDF-UHFFFAOYSA-J cerium(4+);disulfate Chemical compound [Ce+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VZDYWEUILIUIDF-UHFFFAOYSA-J 0.000 claims abstract description 11
- 229910000355 cerium(IV) sulfate Inorganic materials 0.000 claims abstract description 11
- 239000011259 mixed solution Substances 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000007254 oxidation reaction Methods 0.000 claims description 26
- 230000003647 oxidation Effects 0.000 claims description 25
- 150000007522 mineralic acids Chemical class 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 19
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 18
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 12
- 229940078494 nickel acetate Drugs 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 abstract description 23
- 239000004411 aluminium Substances 0.000 abstract description 19
- 238000007743 anodising Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000008151 electrolyte solution Substances 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910000906 Bronze Inorganic materials 0.000 description 7
- 239000010974 bronze Substances 0.000 description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052684 Cerium Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 229910001948 sodium oxide Inorganic materials 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 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 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 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 1
- 230000000266 injurious effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 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
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The method of the electrolyte, fine aluminium part surface anodization that the present invention relates to a kind of for fine aluminium part surface anodization, belongs to anodizing of aluminium technical field.Electrolyte for fine aluminium part surface anodization of the invention is the mixed solution of sulfuric acid, glycerine and ceric sulfate, and the mass concentration of sulfuric acid is 155~165g/L, and the volumetric concentration of glycerine is 4~8ml/L, and the mass concentration of ceric sulfate is 2~4g/L.It,, can be in the Al of pure aluminium workpiece surface formation high rigidity by adding suitable glycerine and ceric sulfate in the electrolytic solution using sulfuric acid as main component using the electrolyte for fine aluminium part surface anodization of the invention2O3Film, the Al2O3The thickness of film is only 15~30 μm, and Vickers hardness is up to 420~500HV.
Description
Technical field
The side of the electrolyte, fine aluminium part surface anodization that the present invention relates to a kind of for fine aluminium part surface anodization
Method belongs to anodizing of aluminium technical field.
Background technique
High-voltage switch gear insulate gas chamber in, electric field be mostly it is non-uniform, need to take measures to improve field distribution, reduction office
The excessively high field strength in portion improves the overall dielectric intensity of insulation system.In insulation gas chamber usually with shielding case, shielding part, press
The parts such as ring improve this phenomenon.Fine aluminium system has excellent corrosion resistance, high heat conductance, high conductivity and excellent adds
Work, but mechanical performance is low, and surface metal bits cleaning is difficult.High-voltage switch gear insulate plenum interior shielding part multidigit in major loop
Outer most edge, electric field conditions are the harshest, and slightly carelessness may cause gas chamber breakdown.It is right with the raising of product voltage class
The control of shielding part Superficial Foreign Body is more harsh.Especially fine aluminium (1050,1070) material, is processed by spinning process
Type, rotary press modelling rear surface are easy the elongated metal fillings of residual, if the cleaning of spinning part metallic foreign body is not thorough, GIS is for a long time
In operation, once foreign matter falls off, discharge accident will lead to, it is therefore necessary to effectively be controlled to foreign matter on shielding part
System.Traditional control matter method is polishing washing process, and still, there are still metallic foreign bodies after cleaning, as sand paper is thinner, finally
Graininess is changed by strip for metallic foreign body.With Development for Cleaning Technique, ultrasonic cleaning is with more and more, but shielding part
After ultrasonic cleaning, strip metal foreign matter is still had, and be easy to cause injurious surface mark when raising power, if power
Too small scavenging period is long, low efficiency.Therefore ideal is not achieved in shielding part Superficial Foreign Body treatment process in ultrasonic cleaning technology
Effect.
Anode oxidation surface processing process is suitable for improving the corrosion resistances of aluminum products, wearability and for high electric field insulation.
Alumilite process technique has sulfuric acid process, phosphoric acid method, Oxalic Acid Method, chromic acid method and mixed acid process etc..Wherein most widely used is sulphur
Sour anodizing and mixed acid anodic oxidation method.Englishman carries out at sulphuric acid anodizing in aluminium surface first in nineteen thirty-seven
Reason, for anode oxide film obtained with a thickness of 5~20 μm, the microhardness of film layer is higher, and the hole of porous layer has very strong absorption
Ability easily carries out closing and dyeing processing.Sulfuric acid process anode oxidation process is continuously improved, toward sulfuric acid on the basis of traditional handicraft
A certain amount of organic acid, surfactant and sulfate etc. are also added in solution is configured to electrolyte.Using sulphuric acid anodizing
The aluminium anode oxide film of technique preparation has good corrosion resistance, higher microhardness and excellent wearability, also easily right
It is oxidation film sealing of hole, dyeing, easy to operate, at low cost, it is widely used in the industry.In the prior art, application publication number
To disclose a kind of surface treatment method of aluminium in the Chinese invention patent application of CN102925946A, this method is by aluminium
It is immersed in 1~2min in sulfuric acid solution, then carries out etch reaction with the strong base solution being made of sodium hydroxide and sodium nitrate solution,
13~15g containing sodium hydroxide in every liter of strong alkali solution, etch reaction temperature are 20~45 DEG C, and the time is 30~60s, is then soaked
Bubble 1~2min in sulfuric acid solution, then be immersed in sulfuric acid solution, apply voltage, carries out anodic oxidation, it is water-soluble to be immersed in nickel acetate
Sealing of hole in liquid, temperature are 15~30 DEG C, and the sealing of hole time is 12~16min, finally wash, air-dry；Using this method to aluminium into
The closing by oxidation film to metal fillings may be implemented in the processing of row surface anodization, but fine aluminium material is soft, using this method pure
The oxidation film hardness that aluminium workpiece surface is formed is not good enough, and wear resistance cannot be effectively ensured and control the effect of foreign matter.
Summary of the invention
The object of the present invention is to provide a kind of electrolyte for fine aluminium part surface anodization, can be in pure aluminium workpiece surface
Form the Al of high rigidity2O3Film.
The present invention also provides a kind of methods of fine aluminium part surface anodization using above-mentioned electrolyte.
In order to achieve the goal above, technical side used by the electrolyte for fine aluminium part surface anodization of the invention
Case is:
A kind of electrolyte for fine aluminium part surface anodization is the mixed solution of sulfuric acid, glycerine and ceric sulfate,
The mass concentration of sulfuric acid is 155~165g/L, and the volumetric concentration of glycerine is 4~8ml/L, and the mass concentration of ceric sulfate is 2
~4g/L.
Using the electrolyte for fine aluminium part surface anodization of the invention, using sulfuric acid as main component, by electricity
Suitable glycerine and ceric sulfate are added in solution liquid, it can be in the Al of pure aluminium workpiece surface formation high rigidity2O3Film, the Al2O3
The thickness of film is only 15~30 μm, and Vickers hardness is up to 420~500HV.
Technical solution used by the method for fine aluminium part surface anodization of the invention are as follows:
A method of using the fine aluminium part surface anodization of above-mentioned electrolyte, comprising the following steps: by fine aluminium part into
It is immersed after row surface de-oiling rouge, oxide film dissolving in the electrolyte and carries out anodized, then washed, is dry；It is described
Oxidation voltage used by anodized is 19~22V, and current density is 0.8~1.2A/dm2。
The method of fine aluminium part surface anodization of the invention, using above-mentioned electrolyte, simple process, cost is relatively low, leads to
It is only 15~30 μm that the oxidation voltage and current density for crossing control anodized, which can form thickness in pure aluminium workpiece surface, dimension
Al of family name's hardness up to 420~500HV2O3Film improves the wear-resisting property of fine aluminium part, and fine aluminium part can be prevented to be used as shielding
Part is generated metal fillings by external force, can also be fixed metal fillings and foreign matter that cladding is not easy to wash, be reduced product discharge accident
Occur, provides guarantee for new-product development.
The time of the anodic oxidation is 35~40min.
The anodized temperature is 20~25 DEG C.The anodic oxidation of fine aluminium part is exothermic reaction, in anodic oxidation
During processing, need to control the temperature of reaction, to guarantee the quality of anodic oxide coating.
The method of above-mentioned fine aluminium part surface anodization, further include after carrying out anodized fine aluminium part washing after
Sealing pores are carried out again, are then washed, are dried again.Al after fine aluminium part anodic oxidation2O3Film is cellular, sealing of hole energy
Reduce Al2O3The porosity and adsorption capacity of film improve the corrosion resistance of fine aluminium part.Cavernous Al2O3It is easy in film
Tacky because remaining sulfuric acid, by the washing before sealing of hole, the sulfuric acid in gap is cleaned.
Washing is carried out first to wash using normal-temperature water to fine aluminium part before carrying out sealing pores, then uses 80~85 again
DEG C hot water washed.
The sealing pores are that fine aluminium part is put into sealing of hole in nickel acetate solution；The mass concentration of the nickel acetate be 9~
11g/L.The pH of nickel acetate solution is 5.5~6.
The temperature of the sealing pores is 85~90 DEG C, and the time is 20~25min.
Fine aluminium part is subjected to the method for surface de-oiling rouge, oxide film dissolving the following steps are included: fine aluminium part, which is successively used, to be had
Solvent, inorganic acid carry out de-oiling rouge, then erode oxide film dissolving using strong base solution, then using in inorganic acid and strong
Alkali.The organic solvent is thinner.The inorganic acid is nitric acid.The strong base solution is the hydrogen-oxygen that mass fraction is 4~6%
Change sodium solution.When eroding oxide film dissolving using sodium hydroxide solution, the stain of pure aluminium workpiece surface and small can also be removed
Scar.
After eroding oxide film dissolving using highly basic, first fine aluminium part is cleaned using 80~85 DEG C of hot water, then again
Using in inorganic acid and highly basic；The time of the cleaning is 8~10min.
Fine aluminium part is washed after organic solvent de-oiling rouge, after inorganic acid de-oiling rouge, in inorganic acid and after highly basic.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the fine aluminium part used in specific embodiment；
Fig. 2 is the top view of the fine aluminium part used in specific embodiment；
Fig. 3 is the schematic diagram of the anodic oxidation equipment used in specific embodiment；
Fig. 4 is the structural schematic diagram of the hook used in specific embodiment.
Specific embodiment
Below in conjunction with specific embodiment, further description of the technical solution of the present invention.
Fine aluminium part in specific embodiment is to obtain pure aluminum material (1050) by spinning process machine-shaping
The cylindric shielding part of both ends open, as depicted in figs. 1 and 2, in the circumferential direction of shielding part barrel equally spacedly setting there are four
Circular through hole 2 is provided on shielding part inner wall for forming the bridge like conducting position 1 covered to circular through hole 2.Used sun
The first of rectangular 3 top of electrolytic bath is arranged in as shown in figure 3, the rectangular electrolytic bath 3 including upper end opening in pole oxidation furnaces
The first cathode plate 7 and the second cathode in rectangular electrolytic bath is arranged in copper crossbeam 4, the second bronze medal crossbeam 5 and third copper crossbeam 6
Plate 8, and the cooling tube 9 of rectangular electrolytic bath bottom is set, the cooler 10 being connected to cooling tube 9；First cathode plate 7 is logical
It crosses after conducting wire and the conducting of the first bronze medal crossbeam 4 vacantly in rectangular electrolytic bath 3, third cathode plate 8 is horizontal by conducting wire and third copper
Beam 6 be connected after also vacantly in rectangular electrolytic bath 3, cooler 10 is arranged outside rectangular electrolytic bath 3；First bronze medal crossbeam, 4 He
Third copper crossbeam 6 is connected with power cathode, and the second bronze medal crossbeam 5 is connected with positive pole.
Hook employed in specific embodiment is to be bent by aluminum steel according to shape shown in Fig. 4.
The process flow of the method for fine aluminium part surface anodization is as follows in specific embodiment: sample survey → de-oiling rouge
Hook → anodic oxygen is washed → is carried additionally in → shielding → inorganic acid de-oiling rouge → washing → highly basic etch → washing → inorganic acid neutralization →
Change processing → washing → hot water wash → sealing pores → washing, drying →, which remove, to be linked up with → deshielding → and checks, packs.
Used inorganic acid be 98% by mass fraction concentrated nitric acid and water according to volume ratio be that 4:96 is mixed to get.
Embodiment 1
The electrolyte for fine aluminium part surface anodization of the present embodiment, is to add sulfuric acid, glycerine and ceric sulfate
Enter and obtained after being mixed in water, the mass concentration of sulfuric acid is 160g/L in electrolyte, and the volumetric concentration of glycerine is 6ml/L, sulphur
The mass concentration of the high cerium of acid is 3g/L.
The method of the fine aluminium part surface anodization of the present embodiment, comprising the following steps:
1) check whether shielding part appearance collides with and scratch, selection are had with the shielding part of scratch using thinner without colliding with
Solvent carries out de-oiling rouge；
2) glass cement in the conducting position brushing acid-alkali-corrosive-resisting of shielding part and solidification, to be hidden to conducting position
It covers；
3) shielding part is immersed and impregnates 5s de-oiling rouge in inorganic acid, 1min is then cleaned to shielding part using 25 DEG C of water；
Shielding part is immersed into etch 4s in the sodium hydroxide solution that mass fraction is 5% again and removes oxidation film, stain and small scratch, then
9min is cleaned using 80 DEG C of hot water；Shielding part is immersed in inorganic acid again and is neutralized, remaining hydrogen is further removed
Sodium oxide molybdena；Then 1min is cleaned to shielding part using 25 DEG C of water；
4) one end of hook is hooked in the circular through hole on shielding part, the other end is hung on the second bronze medal crossbeam, makes shielding part
It is hanging to immerse in electrolyte, then power on and anodized is carried out to fine aluminium part；The oxidation that anodized uses
Voltage is 19V, current density 1A/dm2, the time of anodized is 40min；During anodized, pass through
The temperature that adjustment cooler controls the electrolyte in rectangular electrolytic bath is 25 DEG C；
5) after the completion of anodized, shielding part is cleaned using 25 DEG C of water first, is then cleaned with 85 DEG C of hot water
8min, then sealing of hole is carried out by 20min is impregnated in 90 DEG C of shielding part immersion of nickel acetate solution, it then washes, purged using air
Moisture is removed to be dried；The mass concentration of used nickel acetate solution is 10g/L, pH 6；
6) hook is removed, glass cement is removed, presentation quality is checked, is packed.
The aluminum oxide film formed in pure aluminium workpiece surface using the method for the fine aluminium part surface anodization of the present embodiment
With a thickness of 15 μm, Vickers hardness 480HV.
Embodiment 2
The electrolyte for fine aluminium part surface anodization of the present embodiment, is to add sulfuric acid, glycerine and ceric sulfate
Enter and obtained after being mixed in water, the mass concentration of sulfuric acid is 155g/L in electrolyte, and the volumetric concentration of glycerine is 8ml/L, sulphur
The mass concentration of the high cerium of acid is 2g/L.
The method of the fine aluminium part surface anodization of the present embodiment, comprising the following steps:
1) check whether shielding part appearance collides with and scratch, selection are had with the shielding part of scratch using thinner without colliding with
Solvent carries out de-oiling rouge；
2) glass cement in the conducting position brushing acid-alkali-corrosive-resisting of shielding part and solidification, to be hidden to conducting position
It covers；
3) shielding part is immersed and impregnates 4s de-oiling rouge in inorganic acid, 1min is then cleaned to shielding part using 25 DEG C of water；
Shielding part is immersed into etch 3s in the sodium hydroxide solution that mass fraction is 4% again and removes oxidation film, stain and small scratch, then
8min is cleaned using 85 DEG C of hot water；Shielding part is immersed in inorganic acid again and is neutralized, remaining hydrogen is further removed
Sodium oxide molybdena；Then 1min is cleaned to shielding part using 25 DEG C of water；
4) one end of hook is hooked in the circular through hole on shielding part, the other end is hung on the second bronze medal crossbeam, makes shielding part
It is hanging to immerse in electrolyte, then power on and anodized is carried out to fine aluminium part；The oxidation that anodized uses
Voltage is 20V, current density 0.8A/dm2, the time of anodized is 40min；During anodized, lead to
Crossing adjustment cooler and controlling the temperature of the electrolyte in rectangular electrolytic bath is 25 DEG C；
5) after the completion of anodized, shielding part is cleaned using 20 DEG C of water first, is then cleaned with 80 DEG C of hot water
10min, then sealing of hole is carried out by 25min is impregnated in 85 DEG C of shielding part immersion of nickel acetate solution, it then washes, purged using air
Moisture is removed to be dried；The mass concentration of used nickel acetate solution is 11g/L, pH 6；
6) hook is removed, glass cement is removed, presentation quality is checked, is packed.
The aluminum oxide film formed in pure aluminium workpiece surface using the method for the fine aluminium part surface anodization of the present embodiment
With a thickness of 22 μm, Vickers hardness 420HV.
Embodiment 3
The electrolyte for fine aluminium part surface anodization of the present embodiment, is to add sulfuric acid, glycerine and ceric sulfate
Enter and obtained after being mixed in water, the mass concentration of sulfuric acid is 165g/L in electrolyte, and the volumetric concentration of glycerine is 4ml/L, sulphur
The mass concentration of the high cerium of acid is 4g/L.
The method of the fine aluminium part surface anodization of the present embodiment, comprising the following steps:
1) check whether shielding part appearance collides with and scratch, selection are had with the shielding part of scratch using thinner without colliding with
Solvent carries out de-oiling rouge；
2) glass cement in the conducting position brushing acid-alkali-corrosive-resisting of shielding part and solidification, to be hidden to conducting position
It covers；
3) shielding part is immersed and impregnates 3s de-oiling rouge in inorganic acid, 2min is then cleaned to shielding part using 20 DEG C of water；
Shielding part is immersed into etch 5s in the sodium hydroxide solution that mass fraction is 6% again and removes oxidation film, stain and small scratch, then
10min is cleaned using 83 DEG C of hot water；Shielding part is immersed in inorganic acid again and is neutralized, remaining hydrogen is further removed
Sodium oxide molybdena；Then 2min is cleaned to shielding part using 20 DEG C of water；
4) one end of hook is hooked in the circular through hole on shielding part, the other end is hung on the second bronze medal crossbeam, makes shielding part
It is hanging to immerse in electrolyte, then power on and anodized is carried out to fine aluminium part；The oxidation that anodized uses
Voltage is 22V, current density 1.2A/dm2, the time of anodized is 35min；During anodized, lead to
Crossing adjustment cooler and controlling the temperature of the electrolyte in rectangular electrolytic bath is 20 DEG C；
5) after the completion of anodized, shielding part is cleaned using 25 DEG C of water first, is then cleaned with 83 DEG C of hot water
9min, then sealing of hole is carried out by 23min is impregnated in 88 DEG C of shielding part immersion of nickel acetate solution, it then washes, purged using air
Moisture is removed to be dried；The mass concentration of used nickel acetate solution is 9g/L, pH 6；
6) hook is removed, glass cement is removed, presentation quality is checked, is packed.
The aluminum oxide film formed in pure aluminium workpiece surface using the method for the fine aluminium part surface anodization of the present embodiment
With a thickness of 30 μm, Vickers hardness 500HV.
The method of fine aluminium part surface anodization of the invention, simple process is high-efficient, used electrolyte composition letter
It is single, anodic oxidation rate is improved by the high cerium of addition moderate amount of sulfuric acid, the Al of one layer of high rigidity is formd on shielding part2O3Film,
On the one hand since pure aluminum material matter is soft, the shielding part surface being prepared is easy kish bits, can be made by forming oxidation film
Metal fillings is enclosed in the inside, from the effect for realizing that control foreign matter generates；On the other hand the wear-resisting property of shielding part is enhanced, into one
Step enhances the effect that control foreign matter generates.
Kish bits are easy due to carrying out the shielding part surface that machine-shaping obtains by spinning process, using the present invention
Fine aluminium part surface anodization method, can have the function that remove shielding part foreign matter, compared to polishing water treatment technology and
Ultrasonic cleaning process of surface treatment, at low cost, small to shielding part injury, foreign matter clears up more thorough, reduction shielding part metal
The effect of bits becomes apparent from.
Claims (10)
1. a kind of electrolyte for fine aluminium part surface anodization is the mixed solution of sulfuric acid, glycerine and ceric sulfate,
Be characterized in that: the mass concentration of sulfuric acid is 155~165g/L, and the volumetric concentration of glycerine is 4~8ml/L, the matter of ceric sulfate
Amount concentration is 2~4g/L.
2. a kind of method of the fine aluminium part surface anodization using electrolyte as described in claim 1, it is characterised in that: packet
It includes following steps: being immersed in the electrolyte at progress anodic oxidation after fine aluminium part is carried out surface de-oiling rouge, oxide film dissolving
Then reason washes, is dry；Oxidation voltage used by the anodized be 19~22V, current density be 0.8~
1.2A/dm2。
3. the method for fine aluminium part surface anodization according to claim 2, it is characterised in that: described anodized
Time is 35~40min.
4. the method for fine aluminium part surface anodization according to claim 2, it is characterised in that: further include that will carry out anode
Sealing pores are carried out again after fine aluminium part washing after oxidation processes, are then washed, are dried again.
5. the method for fine aluminium part surface anodization according to claim 4, it is characterised in that: right before progress sealing pores
Fine aluminium part carries out washing first to be washed using normal-temperature water, is then washed again using 80~85 DEG C of hot water.
6. the method for fine aluminium part surface anodization according to claim 4, it is characterised in that: the sealing pores be by
Fine aluminium part is put into sealing of hole in nickel acetate solution；The mass concentration of nickel acetate is 9~11g/L.
7. the method for fine aluminium part surface anodization according to claim 5, it is characterised in that: the temperature of the sealing pores
Degree is 85~90 DEG C, and the time is 20~25min.
8. the method for fine aluminium part surface anodization according to claim 2, it is characterised in that: fine aluminium part is carried out surface
De-oiling rouge, oxide film dissolving method the following steps are included: by fine aluminium part successively use organic solvent, inorganic acid carry out de-oiling rouge,
Then oxide film dissolving is eroded using strong base solution, then using in inorganic acid and highly basic.
9. the method for fine aluminium part surface anodization according to claim 8, it is characterised in that: eroded using highly basic
After removing oxide film dissolving, first fine aluminium part is cleaned using 80~85 DEG C of hot water, then again using in inorganic acid and highly basic；It is described clear
The time washed is 8~10min.
10. the method for fine aluminium part surface anodization according to claim 2, it is characterised in that: organic solvent de-oiling rouge
Afterwards, fine aluminium part is washed after inorganic acid de-oiling rouge, in inorganic acid and after highly basic.
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| CN110512253A (en) * | 2019-09-23 | 2019-11-29 | 芜湖通潮精密机械股份有限公司 | A kind of process of surface treatment before the anodic oxidation for heating pedestal |
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| DE102008008055B3 (en) * | 2008-02-08 | 2009-08-06 | Airbus Deutschland Gmbh | Method for applying a multifunctional coating on aluminum parts and coated workpiece |
| CN102485967A (en) * | 2010-12-06 | 2012-06-06 | 深圳市鹏桑普太阳能股份有限公司 | Process for preparing continuous anodic oxide film light-absorbing coating |
| CN102002745B (en) * | 2010-12-17 | 2012-05-30 | 周红 | Method and device for manufacturing deodorant, antibacterial, antimycotic and antifouling aluminium foils or alloy aluminum foils |
| CN102154674B (en) * | 2011-05-06 | 2013-07-17 | 广西南南铝加工有限公司 | Method for anodizing aluminum pendants |
| CN102925946B (en) * | 2011-08-09 | 2016-05-11 | 佛山市鸿金源精密制造有限公司 | A kind of surface treatment method of aluminium |
| CN105274602A (en) * | 2014-07-09 | 2016-01-27 | 黄燕滨 | Anti-corrosion surface treatment method based on rare-earth modified phosphoric and sulfuric acid anodizing |
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| CN110512253A (en) * | 2019-09-23 | 2019-11-29 | 芜湖通潮精密机械股份有限公司 | A kind of process of surface treatment before the anodic oxidation for heating pedestal |
| CN110512253B (en) * | 2019-09-23 | 2021-11-30 | 芜湖通潮精密机械股份有限公司 | Surface treatment process used before heating base anodic oxidation |
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