CN109402699A - A kind of aluminum alloy surface acid resistance corrosion function ceramic membrane preparation process - Google Patents
A kind of aluminum alloy surface acid resistance corrosion function ceramic membrane preparation process Download PDFInfo
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- CN109402699A CN109402699A CN201811297081.0A CN201811297081A CN109402699A CN 109402699 A CN109402699 A CN 109402699A CN 201811297081 A CN201811297081 A CN 201811297081A CN 109402699 A CN109402699 A CN 109402699A
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- aluminum alloy
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 130
- 239000000919 ceramic Substances 0.000 title claims abstract description 45
- 239000012528 membrane Substances 0.000 title claims abstract description 43
- 239000002253 acid Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000005260 corrosion Methods 0.000 title description 24
- 230000007797 corrosion Effects 0.000 title description 22
- 239000003792 electrolyte Substances 0.000 claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 69
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000008367 deionised water Substances 0.000 claims abstract description 41
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 41
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 24
- 230000003647 oxidation Effects 0.000 claims abstract description 23
- 239000003002 pH adjusting agent Substances 0.000 claims abstract description 20
- 238000002203 pretreatment Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000010935 stainless steel Substances 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 13
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 13
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 claims description 11
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 10
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 9
- 229910052700 potassium Inorganic materials 0.000 claims description 9
- 239000011591 potassium Substances 0.000 claims description 9
- 229940011182 cobalt acetate Drugs 0.000 claims description 7
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 7
- MCDLETWIOVSGJT-UHFFFAOYSA-N acetic acid;iron Chemical compound [Fe].CC(O)=O.CC(O)=O MCDLETWIOVSGJT-UHFFFAOYSA-N 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 5
- 229940078494 nickel acetate Drugs 0.000 claims description 5
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 5
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 4
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 235000010344 sodium nitrate Nutrition 0.000 claims description 3
- 239000004317 sodium nitrate Substances 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 235000011008 sodium phosphates Nutrition 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- LZQHZOIDAMYHSS-UHFFFAOYSA-N [F].[Ti] Chemical compound [F].[Ti] LZQHZOIDAMYHSS-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 25
- 238000002156 mixing Methods 0.000 abstract description 9
- 230000002378 acidificating effect Effects 0.000 abstract description 7
- 239000000470 constituent Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 34
- 150000003839 salts Chemical class 0.000 description 33
- 239000007921 spray Substances 0.000 description 26
- 235000011121 sodium hydroxide Nutrition 0.000 description 12
- 239000010949 copper Substances 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000004411 aluminium Substances 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 8
- 239000008399 tap water Substances 0.000 description 8
- 235000020679 tap water Nutrition 0.000 description 8
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 8
- 229910020491 K2TiF6 Inorganic materials 0.000 description 7
- 229910003243 Na2SiO3·9H2O Inorganic materials 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 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 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910020350 Na2WO4 Inorganic materials 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 5
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 235000021317 phosphate Nutrition 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005524 ceramic coating Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- ORVGYTXFUWTWDM-UHFFFAOYSA-N silicic acid;sodium Chemical compound [Na].O[Si](O)(O)O ORVGYTXFUWTWDM-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- 240000006409 Acacia auriculiformis Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- -1 rare earth cerous nitrate Chemical class 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000010457 zeolite 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
-
- 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
- C25D11/024—Anodisation under pulsed or modulated current or potential
-
- 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
- C25D11/026—Anodisation with spark discharge
-
- 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
Abstract
The present invention relates to a kind of aluminum alloy surface acid resistances to corrode function ceramic membrane preparation process, which obtains the aluminum alloy base material of pre-treatment the following steps are included: (1) that aluminum alloy base material is polished, cleaning, drying；(2) the aluminum alloy base material of pre-treatment is placed in pretreatment fluid and is handled, it is cleaned, dry, obtain pretreated aluminum alloy base material；(3) prepare micro-arc oxidation electrolyte: basic electrolyte, function electrolyte, pH adjusting agent being added in deionized water, after mixing, obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13；(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in micro-arc oxidation electrolyte, opens circulating cooling, micro-arc oxidation treatment is carried out using the AC bi-polar pulse power, take out aluminium alloy sample after the completion and is rinsed with water, dries.Treatment process of the present invention is simple, and prepared aluminum alloy differential arc oxidation function ceramic membrane even compact, constituent are controllable, and stability is good in acidic environment.
Description
Technical field
The present invention relates to field of metal surface treatment technology more particularly to a kind of aluminum alloy surface acid resistance corrosion function potteries
Porcelain film preparation technique.
Background technique
The density of aluminium is 2.73 g/cm3, it is the 1/3 of iron and copper, magnesium, aluminium and its conjunction is only second in structural metallic materials
Fitting has the advantages that strong specific strength high, electric conductivity and thermal conductivity and plasticity and good moldability, is widely used in various industry systems
Make field.However the standard electrode potential of aluminium is -1.663 V, is a kind of more active metal, in normal natural conditions
Under, aluminium alloy has stronger corrosion resisting property, but in actual use, and the local corrosion phenomenon of aluminium alloy is often very tight
Weight is particularly in the environment such as high temperature, high humidity, corrosive medium such as marine environment or atmospheric environment application field complicated and changeable
Under the conditions of when.In recent years, SO in atmospheric environmentx、NOx、Cl-It presents and rises Deng the corrosive medium content with extremely strong erosiveness
Trend has seriously affected the service life of the structural members such as aluminium alloy.Therefore, people are often through various surface treatment means in aluminium
Alloy surface forms one layer of protective layer, to achieve the purpose that protect alloy matrix aluminum not to be corroded.
Differential arc oxidization technique be it is a kind of can the new technology of aluminum alloy surface growth in situ oxide ceramic membrane, principle be
Under heat chemistry, electrochemistry and plasma chemistry collective effect, forming one layer in aluminum alloy surface has hardness height, binding force
By force, good insulating and corrosion resisting property it is preferable, be the ceramic membrane mainly formed with the oxide of aluminium.But due to differential arc oxidation mistake
The discharge channel that arc discharge generates in journey causes oxide ceramic membrane to form porous structure, and this porous structure is easy absorption environment
In corrosive medium so that corrode ion enter inside oxidation film via porous channel, in some instances it may even be possible to penetrate into oxidation film/matrix
Interface is corroded, and is failed so as to cause the protective performance of oxidation film.For the structure of micro-arc oxidation of aluminum alloy surface ceramic membrane
Defect, some post-processings and composite coating technology come into being.Such as the Chinese patent (patent No.: 201210261518.1) " a kind of
The method of preparation aluminum alloy anti-corrosion layer and used electrolyte " etc., one layer of differential of the arc oxygen is prepared on aluminum alloy base material surface first
Change oxide layer, then using rare earth cerous nitrate solution sealing pores, obtained sealing of hole ceramic coating formed by micro-arc oxidation has preferable
Resistance to neutral salt spray performance, others also have using boiling water, chromate, silicate, phosphate, stearic acid and various hydrate colloidal sols
Equal hole sealing agents sealing of hole；And Chinese patent (application number: 201410839985.7) " a kind of to prepare micro-arc oxidation of aluminum alloy surface-change
Learn the preparation method of copper facing composite coating ", a kind of Chinese patent (application number: 201611069146.7) " aluminium material surface oxidation pottery
Porcelain film and the compound wear-and corrosion-resistant coating and preparation method thereof of zeolite membrane " etc. be by two steps or multistep processes on aluminium base surface
Two or more layers protective layer is formed, by increasing the compactness of protective layer, to reduce the invasion channel for corroding ion.Also there is text
Offer report (Wang Yanqiu, Wang Yue, the old institutional framework and corrosion-proof wear for sending bright equal 7075 aluminum alloy differential arc oxidation coating of
Can Acta Metallurgica Sinica, 2011,47 (4): 455-467.) the resistance to neutral salt spray of differential arc oxidation coating that is prepared through appropriate technique
Can be up to 1000 hours or more, but its acid resistance salt spray test is after 96 hours, film layer falls off (Xu Tao there are different degrees of corrosion
Great waves, the anti-corrosion Journal of Sex Research plating of aluminum alloy differential arc oxidation film layer and finish under Zhang Xiaoling naval air environment, 2018,
40 (2): 11-14.).Although sealing pores can effectively improve the corrosion resisting property of differential arc oxidation film layer, it is in acidic environment
Also be easy closing failure, eventually lead to aluminum alloy base material be corroded (such as Ye Zuoyan, Liu Daoxin, Li Chongyang closing to aluminium close
Golden micro-arc oxidation films corrosion proof influence Journal of Inorganic Materials in an acidic solution, 2015,30 (6): 627-632.).When
Before, the SO in atmospheric environmentx、NOxAnd Cl-Equal acidic corrosive medias are generally existing, cause aluminum alloy junction component during military service
Often it is in contact with acidic environment, though the above modification technology can effectively improve the resistance to neutral salt spray performance of aluminum alloy base material,
Its treatment process is relatively complicated, and micro-arc oxidation films are easy to corrosion failure in acidic environment.Therefore, a kind of processing work is developed
Skill is simple, oxidation film compact structure, and stability is good in acidic environment, and the controllable function ceramics protective layer of ingredient seems especially heavy
It wants.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of simple processes, the aluminum alloy surface of oxidation film compact structure
Acid resistance corrodes function ceramic membrane preparation process.
To solve the above problems, a kind of aluminum alloy surface acid resistance of the present invention corrodes function ceramics film preparation work
Skill, comprising the following steps:
(1) aluminum alloy base material is polished, cleaning, drying, obtain the aluminum alloy base material of pre-treatment；
(2) the aluminum alloy base material of the pre-treatment is placed in the sodium hydroxide (NaOH) and mass fraction that are 10% by mass fraction
For 5% sodium nitrate (NaNO3) composition pretreatment fluid in, it is cleaned, dry after handling 5 min, obtain pretreated aluminium and close
Auri material；
(3) prepare micro-arc oxidation electrolyte: basic electrolyte, function electrolyte, pH adjusting agent being added in deionized water, mix
After closing uniformly, the micro-arc oxidation electrolyte that pH value is 11 ~ 13 is obtained；
The basic electrolyte refers to based on 1L deionized water by 0 ~ 20 g calgon ((NaPO3)6), 5 ~ 30 g tricresyl phosphates
Sodium (Na3PO4·12H2O), 0 ~ 35 g sodium metasilicate (Na2SiO3·9H2O it) mixes；
The function electrolyte refers to based on 1L deionized water by 3 ~ 20 g ammonium metavanadate (NH4VO3), 0 ~ 20 g sodium tungstate
(Na2WO4·2H2O), 0 ~ 15 g potassium fluotitanate (K2TiF6), 0 ~ 15 g cobalt acetate (C4H6CoO4), 0 ~ 15 g nickel acetate (Ni
(CH3COO)2·4H2O), 0 ~ 15 g ferrous acetate (C4H6FeO4), 0 ~ 15 g copper acetate (Cu (CH3COO)2·4H2O one in)
The mixture of kind or many kinds of substance composition；
The pH adjusting agent refers to based on 1L deionized water by 0 ~ 8 g ammonium citrate (C6H5O7(NH4)3), 0 ~ 10 g ammonium fluoride
(NH4F), the mixture of 0 ~ 10 g potassium hydroxide (KOH), one of 0 ~ 4 g sodium hydroxide (NaOH) or many kinds of substance forms；
(4) using aluminum alloy base material as anode, stainless steel is cathode, and the pretreated aluminum alloy base material is immersed in the differential of the arc
In oxidation electrolyte, circulating cooling is opened, the pretreated aluminum alloy base material is carried out using the AC bi-polar pulse power
Micro-arc oxidation treatment takes out aluminium alloy sample after the completion and is rinsed with water, dries.
The step (3) in basic electrolyte concentration be 15 ~ 40 g/L.
The step (3) in the concentration of function electrolyte be 21 ~ 30 g/L.
The step (4) in micro-arc oxidation treatment condition refer to the AC bi-polar pulse power frequency be 100 ~ 500
Hz, duty ratio are 3 ~ 40%, and current density is controlled in 5 ~ 20 A/dm2, processing positive voltage is 450 ~ 550 V, and negative voltage is 0 ~ 120
V, processing time are 10 ~ 120 min.
Compared with the prior art, the present invention has the following advantages:
1, treatment process of the present invention is simple, and prepared aluminum alloy differential arc oxidation function ceramic membrane even compact, constituent can
It controls, stability is good in acidic environment.
2, aluminum alloy differential arc oxidation function ceramic membrane prepared by the present invention has excellent resistance to neutral salt spray performance and acidproof
Property salt fog performance, can be widely applied to the corrosion protection for the Aluminium alloy structural material being on active service under harsh operating condition.
Referring to the resistance to of GJB 150.1-86 " military equipment environmental test method-salt spray test " standard testing function ceramic membrane
Neutral salt spray performance >=1000 hour, according to GB/T 10125-2012 " artificial atmosphere corrosion test-salt spray test " test function
Acid resistance salt air corrosion performance >=800 hour of ceramic membrane.
3, the present invention is suitable for the aluminium alloy of various models, is also applied for the aluminum alloy spare part of various complicated shapes.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 is the microscopic appearance photo of micro-arc oxidation of aluminum alloy surface function ceramic membrane of the present invention.
Fig. 2 is the micro-arc oxidation of aluminum alloy surface function ceramic membrane photo of resistance to neutral salt spray test (salt from left to right of the present invention
The mist time is respectively as follows: 0h, 864h, 1100h).
Fig. 3 is micro-arc oxidation of aluminum alloy surface function ceramic membrane acid resistance salt spray test photo of the present invention.It is (sour from left to right
The property salt fog time is respectively as follows: 0h, 584h, 800h).
Fig. 4 is that micro-arc oxidation of aluminum alloy surface conventional ceramic film acid resistance salt mist experiment photo of the present invention is (sour from left to right
The property salt fog time is respectively as follows: 0 h, 96 h, 144 h).
Fig. 5 is hydrochloric acid (pH=1) soak test photo (left figure of micro-arc oxidation of aluminum alloy surface function ceramic membrane of the present invention
Before impregnating, right figure is after impregnating 3 h).
Fig. 6 be micro-arc oxidation of aluminum alloy surface conventional ceramic film hydrochloric acid (pH=1) soak test photo (left figure be impregnate
Before, right figure is after impregnating 3 h).
Specific embodiment
A kind of aluminum alloy surface acid resistance of embodiment 1 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) cleaning sample surface and oil contaminant first is wiped with ethyl alcohol or abluent by after aluminum alloy base material surface polishing with sand paper,
It is rinsed well and is dried with deionized water again, obtain the aluminum alloy base material of pre-treatment.
Aluminum alloy base material uses 2A12 aluminium alloy for ground, ingredient are as follows: 4.8% Cu, 1.6% Mg, 0.5% Fe, and 0.5%
Si, 0.3% Mn, 0.25% Zn, 0.1% Ni, 0.05% Ti and surplus Al, sample size are as follows: the mm × 6 of 70 mm × 30 mm.
(2) the aluminum alloy base material of pre-treatment is placed in the sodium hydroxide (NaOH) and mass fraction that are 10% by mass fraction
For 5% sodium nitrate (NaNO3) composition pretreatment fluid in, handle 5 min after, clean up and dry through deionized water, obtain
Pretreated aluminum alloy base material.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 15 g/L in deionized water, concentration is
The function electrolyte of 21 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 10 g calgon ((NaPO3)6), 5 g tricresyl phosphates
Sodium (Na3PO4·12H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 10 g ammonium metavanadate (NH4VO3), 4 g sodium tungstate (Na2WO4·
2H2O), 3 g potassium fluotitanate (K2TiF6), 2 g cobalt acetate (C4H6CoO4), 2 g ferrous acetate (C4H6FeO4) composition.
PH adjusting agent refers to based on 1L deionized water by 1 g ammonium citrate (C6H5O7(NH4)3), 5 g potassium hydroxide
(KOH) it forms.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, open circulating cooling, using AC bi-polar pulse power constant voltage mode the AC bi-polar pulse power frequency
Rate is 100 Hz, and duty ratio 15%, processing positive voltage is 500 V, and negative voltage is 80 V, and current density is 5 A/dm2Condition
Under to pretreated 120 min of aluminum alloy base material micro-arc oxidation treatment.Micro-arc oxidation electrolyte is located always in micro-arc oxidation process
In state is sufficiently stirred.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Fig. 1 is the microcosmic stereoscan photograph of micro-arc oxidation of aluminum alloy surface function ceramic membrane.It can be seen from the figure that oxygen
It is fine and close to change membrane structure, uniformity is preferable, and coating surface is not seen significantly because of the remaining micropore of discharge channel.Fig. 2 and Fig. 3 difference
It is the neutral salt spray and acid salt spray test photo of micro-arc oxidation of aluminum alloy surface function ceramic membrane, as can be seen from the figure function
Ceramic membrane is tested after 1100 h under neutral salt fog environments without obvious sign's of failure, the acid salt fog environmental testing knot through 800 h
Fruit shows that aluminium alloy and its function of surface ceramic membrane are still intact.Fig. 4 is conventional ceramic coating formed by micro-arc oxidation in acid salt mist environment
In test photo, it can be seen that there is apparent spot corrosion in ceramic membrane surface after 144 h.Fig. 5 and Fig. 6 is respectively function pottery
Porcelain film and conventional ceramic film impregnate 3 h in the hydrochloric acid solution that pH is 1 after photomacrograph, it can be seen from the figure that conventional pottery
Has there is more apparent etch pit in porcelain film surface, and function ceramics film surface is without significant change.
A kind of aluminum alloy surface acid resistance of embodiment 2 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
Aluminum alloy base material uses 6061 aluminium alloys for ground, ingredient are as follows: 1.1% Mg, 0.7% Fe, 0.6% Si, and 0.25%
Zn, 0.2% Cu, 0.15% Mn, 0.15% Ti, 0.1% Cr and surplus Al, sample size are as follows: the mm × 6 of 70 mm × 30 mm.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 40 g/L in deionized water, concentration is
The function electrolyte of 30 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 30 g tertiary sodium phosphate (Na3PO4·12H2O), 10 g silicon
Sour sodium (Na2SiO3·9H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 20 g ammonium metavanadate (NH4VO3), 2 g sodium tungstate (Na2WO4·
2H2O), 2 g potassium fluotitanate (K2TiF6), 2 g cobalt acetate (C4H6CoO4), 2 g nickel acetate (Ni (CH3COO)2·4H2O), 2 g second
Sour copper (Cu (CH3COO)2·4H2O it) forms.
PH adjusting agent refers to based on 1L deionized water by 2 g ammonium fluoride (NH4F), 2 g potassium hydroxide (KOH), 4 g hydrogen
Sodium oxide molybdena (NaOH) composition.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, open circulating cooling, using AC bi-polar pulse power constant voltage mode the AC bi-polar pulse power frequency
Rate is 500 Hz, and duty ratio 3%, processing positive voltage is 480 V, and negative voltage is 120 V, and current density is 10 A/dm2Item
To pretreated 70 min of aluminum alloy base material micro-arc oxidation treatment under part.Micro-arc oxidation electrolyte is located always in micro-arc oxidation process
In state is sufficiently stirred.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1500 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 1000 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 3 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
Aluminum alloy base material uses a length of ground of 7075 aluminium alloys, ingredient are as follows: 2.1 ~ 2.9% Mg, 0.5% Fe, 0.4%
Si, 5.1 ~ 6.1% Zn, 1.2 ~ 2.0% Cu, 0.3% Mn, 0.2% Ti, 0.18 ~ 0.28% Cr and surplus Al, sample size are as follows:
70 mm×30 mm×6 mm。
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 35 g/L in deionized water, concentration is
The function electrolyte of 27 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 20 g calgon ((NaPO3)6), 10 g tricresyl phosphates
Sodium (Na3PO4·12H2O), 5 g sodium metasilicate (Na2SiO3·9H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 3 g ammonium metavanadate (NH4VO3), 20 g sodium tungstate (Na2WO4·
2H2O), 4 g potassium fluotitanate (K2TiF6) composition.
PH adjusting agent refers to based on 1L deionized water by 10 g ammonium fluoride (NH4F), 10 g potassium hydroxide (KOH) form.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, open circulating cooling, using AC bi-polar pulse power constant current mode the AC bi-polar pulse power frequency
Rate is 150 Hz, and duty ratio 30%, current density control is in 20 A/dm2, processing positive voltage is 550 V, and negative voltage is 0 V item
To pretreated 10 min of aluminum alloy base material micro-arc oxidation treatment under part.Micro-arc oxidation electrolyte is located always in micro-arc oxidation process
In state is sufficiently stirred.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 2000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 1000 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 4 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 40 g/L in deionized water, concentration is
The function electrolyte of 23 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 5 g tertiary sodium phosphate (Na3PO4·12H2O), 35 g silicic acid
Sodium (Na2SiO3·9H2O it) forms.
Function electrolyte refers to based on 1L deionized water by 4 g ammonium metavanadate (NH4VO3), 15 g cobalt acetate (C4H6CoO4),
2 g copper acetate (Cu (CH3COO)2·4H2O), 2 g ferrous acetate (C4H6FeO4) composition.
PH adjusting agent refers to based on 1L deionized water by 8 g ammonium citrate (C6H5O7(NH4)3), 1 g potassium hydroxide
(KOH) it forms.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, circulating cooling is opened, uses the AC bi-polar pulse power in the frequency of the AC bi-polar pulse power for 300
Hz, duty ratio 20%, current density are controlled in 15 A/dm2, handle under the conditions of positive voltage is 450 V to pretreated aluminium alloy
60 min of substrate micro-arc oxidation treatment.Micro-arc oxidation electrolyte is constantly in the state of being sufficiently stirred in micro-arc oxidation process.It completes
Aluminium alloy sample is taken out afterwards and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 800 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 5 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 15 g/L in deionized water, concentration is
The function electrolyte of 24 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 5 g calgon ((NaPO3)6), 5 g tertiary sodium phosphates
(Na3PO4·12H2O), 5 g sodium metasilicate (Na2SiO3·9H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 5 g ammonium metavanadate (NH4VO3), 15 g copper acetate (Cu
(CH3COO)2·4H2O), 2g nickel acetate (Ni (CH3COO)2·4H2O), 2 g potassium fluotitanate (K2TiF6) composition.
PH adjusting agent refers to based on 1L deionized water by 2 g ammonium citrate (C6H5O7(NH4)3), 3 g ammonium fluorides
(NH4F), 1 g sodium hydroxide (NaOH) forms.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, circulating cooling is opened, uses the AC bi-polar pulse power in the frequency of the AC bi-polar pulse power for 500
Hz, duty ratio 40%, current density are controlled in 12 A/dm2, processing positive voltage is 550 V, and negative voltage is right under the conditions of being 50 V
Pretreated 80 min of aluminum alloy base material micro-arc oxidation treatment.Micro-arc oxidation electrolyte is constantly in sufficiently in micro-arc oxidation process
Stirring.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 800 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 6 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 20 g/L in deionized water, concentration is
The function electrolyte of 26 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 10 g calgon ((NaPO3)6), 6 g tricresyl phosphates
Sodium (Na3PO4·12H2O), 4 g sodium metasilicate (Na2SiO3·9H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 6 g ammonium metavanadate (NH4VO3), 5 g sodium tungstate (Na2WO4·
2H2O), 15 g potassium fluotitanate (K2TiF6) composition.
PH adjusting agent refers to based on 1L deionized water by 2 g potassium hydroxide (KOH), 4 g sodium hydroxides (NaOH) composition.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, circulating cooling is opened, uses the AC bi-polar pulse power in the frequency of the AC bi-polar pulse power for 400
Hz, duty ratio 15%, current density are controlled in 16A/dm2, processing positive voltage be 500 V, negative voltage be 60 V under the conditions of to pre-
90 min of aluminum alloy base material micro-arc oxidation treatment of processing.Micro-arc oxidation electrolyte, which is constantly in, in micro-arc oxidation process sufficiently stirs
Mix state.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 800 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 7 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: addition concentration is the basic electrolyte of 20 g/L in deionized water, concentration is
The function electrolyte of 30 g/L, pH adjusting agent obtain the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte refers to based on 1L deionized water by 15 g tertiary sodium phosphate (Na3PO4·12H2O), 5 g silicic acid
Sodium (Na2SiO3·9H2O it) mixes.
Function electrolyte refers to based on 1L deionized water by 3 g ammonium metavanadate (NH4VO3), 5 g potassium fluotitanate (K2TiF6),
5 g cobalt acetate (C4H6CoO4), 15 g nickel acetate (Ni (CH3COO)2·4H2O), 2 g ferrous acetate (C4H6FeO4) composition.
PH adjusting agent refers to based on 1L deionized water by 4 g potassium hydroxide (KOH), 2 g sodium hydroxides (NaOH) composition.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, circulating cooling is opened, uses the AC bi-polar pulse power in the frequency of the AC bi-polar pulse power for 200
Hz, duty ratio 30%, current density are controlled in 15 A/dm2, processing positive voltage is 490 V, and negative voltage is right under the conditions of being 80 V
Pretreated 75 min of aluminum alloy base material micro-arc oxidation treatment.Micro-arc oxidation electrolyte is constantly in sufficiently in micro-arc oxidation process
Stirring.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 800 h of property salt spray test.
A kind of aluminum alloy surface acid resistance of embodiment 8 corrodes function ceramic membrane preparation process, comprising the following steps:
(1) the aluminum alloy base material of pre-treatment is the same as embodiment 1.
(2) pretreated aluminum alloy base material is the same as embodiment 1.
(3) prepare micro-arc oxidation electrolyte: basic electrolyte, function electrolyte, pH value being added in deionized water and adjusts
Agent obtains the micro-arc oxidation electrolyte that pH value is 11 ~ 13 after mixing.
Wherein: basic electrolyte is the same as embodiment 1.
Function electrolyte refers to based on 1L deionized water by 4 g ammonium metavanadate (NH4VO3), 2 g cobalt acetate (C4H6CoO4),
15 g ferrous acetate (C4H6FeO4) composition.
PH adjusting agent is the same as embodiment 1.
(4) using aluminum alloy base material as anode, stainless steel is cathode, and pretreated aluminum alloy base material is immersed in differential arc oxidation
In electrolyte, circulating cooling is opened, uses the AC bi-polar pulse power in the frequency of the AC bi-polar pulse power for 200
Hz, duty ratio 25%, current density are controlled in 10 A/dm2, processing positive voltage is 500 V, and negative voltage is right under the conditions of being 80 V
Pretreated 80 min of aluminum alloy base material micro-arc oxidation treatment.Micro-arc oxidation electrolyte is constantly in sufficiently in micro-arc oxidation process
Stirring.Aluminium alloy sample is taken out after the completion and is rinsed well and is dried with tap water.
Resulting aluminium alloy function ceramics membrane sample is prepared using the technique and tests 1000 h, acid through neutrality salt spray test
Without obvious corrosion phenomenon after 800 h of property salt spray test.
Claims (4)
1. a kind of aluminum alloy surface acid resistance corrodes function ceramic membrane preparation process, comprising the following steps:
(1) aluminum alloy base material is polished, cleaning, drying, obtain the aluminum alloy base material of pre-treatment；
(2) the aluminum alloy base material of the pre-treatment is placed in the sodium hydroxide and mass fraction that are 10% by mass fraction is 5%
It is cleaned, dry after handling 5 min in the pretreatment fluid of sodium nitrate composition, obtain pretreated aluminum alloy base material；
(3) prepare micro-arc oxidation electrolyte: basic electrolyte, function electrolyte, pH adjusting agent being added in deionized water, mix
After closing uniformly, the micro-arc oxidation electrolyte that pH value is 11 ~ 13 is obtained；
The basic electrolyte refers to based on 1L deionized water by 0 ~ 20 g calgon, 5 ~ 30 g tertiary sodium phosphates, 0 ~ 35 g
Sodium metasilicate mixes；
The function electrolyte refers to based on 1L deionized water by 3 ~ 20 g ammonium metavanadates, 0 ~ 20 g sodium tungstate, 0 ~ 15 g fluorine titanium
Sour potassium, 0 ~ 15 g cobalt acetate, 0 ~ 15 g nickel acetate, 0 ~ 15 g ferrous acetate, one of 0 ~ 15 g copper acetate or many kinds of substance
Mixture composition；
The pH adjusting agent refers to based on 1L deionized water by 0 ~ 8 g ammonium citrate, 0 ~ 10 g ammonium fluoride, 0 ~ 10 g hydroxide
The mixture of potassium, one of 0 ~ 4 g sodium hydroxide or many kinds of substance forms；
(4) using aluminum alloy base material as anode, stainless steel is cathode, and the pretreated aluminum alloy base material is immersed in the differential of the arc
In oxidation electrolyte, circulating cooling is opened, the pretreated aluminum alloy base material is carried out using the AC bi-polar pulse power
Micro-arc oxidation treatment takes out aluminium alloy sample after the completion and is rinsed with water, dries.
2. a kind of aluminum alloy surface acid resistance as described in claim 1 corrodes function ceramic membrane preparation process, it is characterised in that:
The step (3) in basic electrolyte concentration be 15 ~ 40 g/L.
3. a kind of aluminum alloy surface acid resistance as described in claim 1 corrodes function ceramic membrane preparation process, it is characterised in that:
The step (3) in the concentration of function electrolyte be 21 ~ 30 g/L.
4. a kind of aluminum alloy surface acid resistance as described in claim 1 corrodes function ceramic membrane preparation process, it is characterised in that:
The step (4) in micro-arc oxidation treatment condition refer to the AC bi-polar pulse power frequency be 100 ~ 500 Hz, duty ratio
It is 3 ~ 40%, current density is controlled in 5 ~ 20 A/dm2, processing positive voltage is 450 ~ 550 V, and negative voltage is 0 ~ 120 V, when processing
Between be 10 ~ 120 min.
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