CN116555860B - 一种耐腐蚀铝合金发动机支架及其加工工艺 - Google Patents
一种耐腐蚀铝合金发动机支架及其加工工艺 Download PDFInfo
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- CN116555860B CN116555860B CN202310836695.6A CN202310836695A CN116555860B CN 116555860 B CN116555860 B CN 116555860B CN 202310836695 A CN202310836695 A CN 202310836695A CN 116555860 B CN116555860 B CN 116555860B
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- Prior art keywords
- aluminum alloy
- corrosion
- mxene
- casting
- engine bracket
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 134
- 238000005260 corrosion Methods 0.000 title claims abstract description 50
- 230000007797 corrosion Effects 0.000 title claims abstract description 48
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 238000012545 processing Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 238000005266 casting Methods 0.000 claims abstract description 41
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 150000008117 polysulfides Polymers 0.000 claims abstract description 34
- 229920001021 polysulfide Polymers 0.000 claims abstract description 31
- 239000005077 polysulfide Substances 0.000 claims abstract description 31
- 239000004593 Epoxy Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 150000005010 aminoquinolines Chemical class 0.000 claims abstract description 25
- 230000003075 superhydrophobic effect Effects 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 20
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 19
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 18
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 15
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 15
- BPCXHCSZMTWUBW-UHFFFAOYSA-N triethoxy(1,1,2,2,3,3,4,4,5,5,8,8,8-tridecafluorooctyl)silane Chemical compound CCO[Si](OCC)(OCC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F BPCXHCSZMTWUBW-UHFFFAOYSA-N 0.000 claims abstract description 15
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 13
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229940068041 phytic acid Drugs 0.000 claims abstract description 13
- 235000002949 phytic acid Nutrition 0.000 claims abstract description 13
- 239000000467 phytic acid Substances 0.000 claims abstract description 13
- 238000011065 in-situ storage Methods 0.000 claims abstract description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 36
- 238000005406 washing Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 30
- 230000032683 aging Effects 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 17
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 15
- HVBSAKJJOYLTQU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid Chemical compound NC1=CC=C(S(O)(=O)=O)C=C1 HVBSAKJJOYLTQU-UHFFFAOYSA-N 0.000 claims description 12
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 12
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 10
- WREVVZMUNPAPOV-UHFFFAOYSA-N 8-aminoquinoline Chemical compound C1=CN=C2C(N)=CC=CC2=C1 WREVVZMUNPAPOV-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 229920002873 Polyethylenimine Polymers 0.000 claims description 7
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 6
- 235000015393 sodium molybdate Nutrition 0.000 claims description 6
- 239000011684 sodium molybdate Substances 0.000 claims description 6
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 6
- 235000010344 sodium nitrate Nutrition 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 6
- 229950000244 sulfanilic acid Drugs 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000012982 microporous membrane Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims 3
- 239000010410 layer Substances 0.000 abstract description 31
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002344 surface layer Substances 0.000 abstract description 4
- 238000009830 intercalation Methods 0.000 abstract description 3
- 230000002687 intercalation Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 10
- 229960001545 hydrotalcite Drugs 0.000 description 10
- 229910001701 hydrotalcite Inorganic materials 0.000 description 10
- 229910021645 metal ion Inorganic materials 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 239000002086 nanomaterial Substances 0.000 description 6
- 230000002708 enhancing effect Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 3
- 239000002738 chelating agent Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 description 3
- 150000004692 metal hydroxides Chemical class 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009716 squeeze casting Methods 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- GCMNJUJAKQGROZ-UHFFFAOYSA-N 1,2-Dihydroquinolin-2-imine Chemical compound C1=CC=CC2=NC(N)=CC=C21 GCMNJUJAKQGROZ-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000019439 ethyl acetate Nutrition 0.000 description 1
- 239000000138 intercalating agent Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D181/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
- C09D181/04—Polysulfides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- 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
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Abstract
本发明涉及铝合金技术领域,具体是一种耐腐蚀铝合金发动机支架及其加工工艺,采用间接式挤压铸造铸件,通过控制阳极氧化的工艺参数,在铝合金表面形成均匀的微米孔洞,然后在其表面原位生成含有氨基喹啉的水滑石层;采用植酸、硫酸作为电解液,构建无磷化电解液,以氨基喹啉为插层剂;在含有氨基喹啉的水滑石层的铝合金表面进行纳米孔洞封洞处理,通过调整所用涂料的成分,在改性铝合金表面构建以环氧聚硫树脂与磺酸化MXene为底层,以二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷为表层的双层超疏水自修复涂层,引入具有光热转化剂效用的磺酸化MXene来加快其自修复速率。
Description
技术领域
本发明涉及铝合金技术领域,具体是一种耐腐蚀铝合金发动机支架及其加工工艺。
背景技术
发动机支架是汽车中重要的零部件,是车身与发动机之间的连接件,起到支撑发动机重量,传递力和力矩的作用,因此支架需要足够的强度、刚度和使用寿命。目前发动机所用支架大多为球墨铸铁砂型铸造,因为汽车的轻量化需求,采用重量更轻的铝合金来代替球墨铸铁,是目前行业的研究热点。
铝合金具有性能优良、尺寸稳定等优点,用于制备发动机支架能有效降低车身的整体质量,但是现有铝合金的耐腐蚀性与强度不能满足日益发展的汽车零件需求,因此开发一种耐腐蚀铝合金发动机支架具有现实与经济意义。
发明内容
本发明的目的在于提供一种耐腐蚀铝合金发动机支架及其加工工艺,以解决现有技术中的问题。
为了解决上述技术问题,本发明提供如下技术方案:
一种耐腐蚀铝合金发动机支架的加工工艺,包括以下步骤:
S1:取ADC12铝合金为铝合金基体,采用间接式挤压铸造,得到铸件;
S2:将铸件进行双级时效处理,然后依次进行磨砂、抛光、碱洗、酸洗、水洗、干燥,得到预处理铝合金;
S3:将预处理铝合金放入电解液中,进行阳极氧化,得到阳极氧化铝合金;
S4:在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,得到改性铝合金;
S5:将环氧聚硫树脂、磺酸化MXene混合,得到封孔涂料;将封孔涂料涂覆在改性铝合金表面,固化,得到封孔铝合金;
S6:用聚二甲基硅氧烷、二氧化钛、十三氟辛基三乙氧基硅烷制备超疏水涂料;
S7:将超疏水涂料喷涂到封孔铝合金上,固化,得到一种耐腐蚀铝合金发动机支架。
铝合金发动机支架,需要更高的强度、耐腐蚀性来延长支架的使用寿命,为了解决支架铸造过程中易出现缩孔、缩松缺陷等问题,本发明采用间接式挤压铸造铸件,通过控制其工艺参数,消除铸造缺陷,满足发动机支架的使用要求。
进一步的,间接式挤压铸造的工作条件为:模具材料为SKD61,浇注温度为700℃,模具温度为200℃,空气与支架、空气与模具的传热系数均设置为42W·m-2·K-1;所用压射冲头直径为125mm,挤压比压为100MPa;挤压速度为分段调速,从料饼到浇道中部为第一段,冲头速度为190mm/s;浇道中部到铸件中部为第二段,冲头速度为90mm/s;铸件后半部为第三段,冲头速度为60mm/s。
进一步的,双级时效处理的工作条件为:一级时效为:160℃保持6h;二级时效为:140℃保持1h,160℃保持2h,180℃保持6h,160℃保持6h。
采用双级时效处理,使铸件均质化,从而提高所得铝合金的强度与刚度。
为了进一步提高铝合金表面的抗腐蚀性,对铝合金表面进行阳极氧化处理,但是现有工艺中单一阳极氧化产生的膜层疏松多孔且厚度较薄,在潮湿环境中的抗腐蚀能力不佳,且所用电解液多含有磷等元素,不符合现行绿色生产的要求。
因此本发明中通过控制阳极氧化的工艺参数,在铝合金表面形成均匀的微米孔洞,然后在其表面原位生成含有氨基喹啉的水滑石层,在提高铝合金表面强度及刚度的同时,水滑石本身的高孔隙度和粗糙度,与阳极氧化后的铝合金构造微纳米结构表面,大幅改善铝合金表面的抗腐蚀性,且水滑石本身含有的大量羟基基团和金属氢氧化物,从而提高其与铝合金表面的浸润性。
进一步的,阳极氧化的工作条件为:交流电源为0.8kW,恒定电流为1A,频率为100Hz,时间为2min;阳极氧化所用电解液为:以去离子水为溶剂,其中植酸30mL/L、硫酸5g/L、钼酸钠16g/L、十二烷基苯磺酸钠0.2g/L,温度为120-150℃。
进一步的,改性铝合金的制备包括以下步骤:将十二烷基硫酸钠、去离子水混合,用氨水将溶液pH调节至6.5,加入硝酸锌、8-氨基喹啉,混合后加入阳极氧化铝合金浸渍处理,在80℃下保温7-9h,依次用去离子水、无水乙醇清洗,得到改性铝合金。
且本发明中采用植酸、硫酸作为电解液,构建无磷化电解液,且植酸是一种金属多齿螯合剂,能与铝合金表面、含有氨基喹啉的水滑石层中的金属离子发生络合作用而沉积在基体上,从而增强含有氨基喹啉的水滑石层与铝合金表面的结合力,改善铝合金表面的刚度及强度。
水滑石作为纳米容器易被阴离子改性修饰,同时具有优异的抗腐蚀性,本发明中以8-氨基喹啉为插层剂,制备了一种自抗菌、高耐蚀的铝合金表面。
本发明针对现有铝合金支架的耐腐蚀表面在受到机械损伤时,会加速腐蚀,从而降低支架的使用寿命,本发明在含有氨基喹啉的水滑石层的铝合金表面进行纳米孔洞封洞处理,通过调整所用涂料的成分,在改性铝合金表面构建以环氧聚硫树脂与磺酸化MXene制备的封孔涂料层为底层,以二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷制备的超疏水涂料层为表层的双层超疏水自修复涂层。
进一步的,以质量份数计,封孔涂料的组成为:10-15份环氧聚硫树脂、0.1-0.5份磺酸化MXene。
进一步的,环氧聚硫树脂的制备包括以下步骤:将液态聚硫橡胶、环氧树脂、1,4-二氧六环混合,加入聚醚胺、三乙胺,升温至60-70℃保温2h,得到环氧聚硫树脂。
以环氧树脂、液态聚硫橡胶、聚醚胺合成了一种环氧链段为刚性域,聚硫链段为柔性域的嵌段型环氧树脂,其含有的连续二硫片段与磺酸化MXene、含有氨基喹啉的水滑石层中的金属离子存在金属-二硫键结合,从而赋予其自修复性,且磺酸化MXene中的磺酸基与含有氨基喹啉的水滑石层中的金属离子存在离子-共价键结合,增强网络的复杂度,从而协效增强涂层与水滑石层的结合力。
在涂层底层中引入具有光热转化剂效用的磺酸化MXene来加快其自修复速率,从而增强其自修复性及对高盐高湿等条件下的防腐与保护。
进一步的,磺酸化MXene的制备包括以下步骤:将对氨基苯磺酸、氢氧化钠、去离子水混合,在0-5℃加入硝酸钠,加入盐酸,继续搅拌20-30min,加入MXene,继续搅拌5-7h,用孔径为0.22μm的聚四氟乙烯微孔膜抽滤,依次用去离子水、丙酮、乙醇洗涤5-8次,干燥得到磺酸化MXene。
在涂层表层中引入二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷构建一种多级粗糙微纳结构,赋予铝合金表面超疏水、防腐等性能,且二氧化钛的引入有效增强涂层表面的光自清洁性,从而大幅提高铝合金支架的使用寿命。
进一步的,超疏水涂料的制备包括以下步骤:
将二氧化钛、十三氟辛基三乙氧基硅烷、乙酸乙酯混合,加入聚二甲基硅氧烷与乙酸乙酯的混合液,超声处理15-20min,在35℃下搅拌20min,加入聚乙烯亚胺,搅拌40-50min,得到超疏水涂料。
本发明的有益效果:
本发明提供一种耐腐蚀铝合金发动机支架及其加工工艺,制备了一种高强度、耐腐蚀性好、具有超疏水自修复表面的铝合金发动机支架。
采用间接式挤压铸造铸件,通过控制其工艺参数,消除铸造缺陷,满足发动机支架的使用要求;采用双级时效处理,使铸件均质化,从而提高所得铝合金的强度与刚度。
通过控制阳极氧化的工艺参数,在铝合金表面形成均匀的微米孔洞,然后在其表面原位生成含有氨基喹啉的水滑石层,在提高铝合金表面强度及刚度的同时,水滑石本身的高孔隙度和粗糙度,与阳极氧化后的铝合金构造微纳米结构表面,大幅改善铝合金表面的抗腐蚀性,且水滑石本身含有的大量羟基基团和金属氢氧化物,从而提高其与铝合金表面的浸润性。
采用植酸、硫酸作为电解液,构建无磷化电解液,且植酸是一种金属多齿螯合剂,能够与铝合金表面与含有氨基喹啉的水滑石层的金属离子发生络合作用而沉积在基体上,从而增强含有氨基喹啉的水滑石层与铝合金表面的结合力,改善铝合金表面的刚度及强度;以氨基喹啉为插层剂,对水滑石进行修饰,赋予铝合金表面高耐蚀的特点。
针对现有铝合金支架的耐腐蚀表面在受到机械损伤时,会加速腐蚀,从而降低支架的使用寿命,本发明在含有氨基喹啉的水滑石层的铝合金表面进行纳米孔洞封洞处理,通过调整所用涂料的成分,在改性铝合金表面构建以环氧聚硫树脂与磺酸化MXene为底层,以二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷为表层的双层超疏水自修复涂层。
以环氧树脂、聚硫橡胶、聚醚胺合成了一种环氧链段为刚性域,聚硫链段为柔性域的嵌段型环氧树脂,其含有的连续二硫片段与磺酸化MXene、含有氨基喹啉的水滑石层中的金属存在金属-二硫键结合,从而赋予其自修复性,且磺酸化MXene中的磺酸基与含有氨基喹啉的水滑石层中的金属离子存在离子-共价键结合,增强网络的复杂度,从而协效增强涂层与水滑石层的结合力。
在涂层底层中引入具有光热转化剂效用的磺酸化MXene来加快其自修复速率,从而增强其自修复性及对高盐高湿等条件下的防腐与保护。
在涂层表层中引入二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷构建一种多级粗糙微纳结构,赋予铝合金表面超疏水、防腐等性能,且二氧化钛的引入有效增强涂层表面的自清洁性,从而大幅提高铝合金支架的使用寿命。
具体实施方式
下面将结合本发明的实施例,对本发明中的技术方案进行清楚、完整的描述,显然,所描述的实施例仅是本发明的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
需要说明,若本发明实施例中有涉及方向性指示诸如上、下、左、右、前、后……,则该方向性指示仅用于解释在某一特定姿态如各部件之间的相对位置关系、运动情况等,如果该特定姿态发生改变时,则该方向性指示也相应地随之改变。另外,各个实施例之间的技术方案可以相互结合,但是必须是以本领域普通技术人员能够实现为基础,当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在,也不在本发明要求的保护范围之内。
以下结合具体实施例对本发明的技术方案作进一步详细说明,应当理解,以下实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1:一种耐腐蚀铝合金发动机支架的加工工艺,包括以下步骤:
S1:取ADC12铝合金为铝合金基体,采用间接式挤压铸造,得到铸件;
间接式挤压铸造的工作条件为:模具材料为SKD61,浇注温度为700℃,模具温度为200℃,空气与支架、空气与模具的传热系数均设置为42W·m-2·K-1;所用压射冲头直径为125mm,挤压比压为100MPa;挤压速度为分段调速,从料饼到浇道中部为第一段,冲头速度为190mm/s;浇道中部到铸件中部为第二段,冲头速度为90mm/s;铸件后半部为第三段,冲头速度为60mm/s;
S2:将铸件进行双级时效处理,然后依次进行磨砂、抛光、碱洗、酸洗、水洗、干燥,得到预处理铝合金;
双级时效处理的工作条件为:一级时效为:160℃保持6h;二级时效为:140℃保持1h,160℃保持2h,180℃保持6h,160℃保持6h;
碱洗:用15%碳酸氢钠溶液清洗5min;酸洗:用15%硝酸溶液清洗30s;
S3:将预处理铝合金放入电解液中,进行阳极氧化,得到阳极氧化铝合金;
阳极氧化的工作条件为:交流电源为0.8kW,恒定电流为1A,频率为100Hz,时间为2min;阳极氧化所用电解液为:以去离子水为溶剂,其中植酸30mL/L、硫酸5g/L、钼酸钠16g/L、十二烷基苯磺酸钠0.2g/L,温度为120℃;
S4:在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,得到改性铝合金,包括以下步骤:
将1mmol十二烷基硫酸钠、100mL纯水混合,用稀氨水将溶液pH调节至6.5,添加0.1mmol硝酸锌、0.6mmol8-氨基喹啉,混合后加入阳极氧化铝合金浸渍处理,在80℃下保温7h,依次用去离子水、无水乙醇清洗,得到改性铝合金;
S5:将环氧聚硫树脂、磺酸化MXene混合,得到封孔涂料;将封孔涂料涂覆在改性铝合金表面,70℃固化1h,得到封孔铝合金;
以质量份数计,封孔涂料的组成为:10份环氧聚硫树脂、0.1份磺酸化MXene;
环氧聚硫树脂的制备包括以下步骤:将1mmol液态聚硫橡胶、2mmol环氧树脂E44、1mmol1,4-二氧六环混合,加入0.5g聚醚胺、0.1g三乙胺,升温至60℃保温2h,得到环氧聚硫树脂;
磺酸化MXene的制备包括以下步骤:将2g对氨基苯磺酸,1g氢氧化钠、30mL去离子水混合,在0℃加入0.8g硝酸钠,加入10mL30%盐酸,继续搅拌20min,加入0.25gMXene,继续搅拌5h,用孔径为0.22μm的聚四氟乙烯微孔膜抽滤,依次用去离子水、丙酮、乙醇洗涤5次,干燥得到磺酸化MXene;
S6:用聚二甲基硅氧烷、二氧化钛、十三氟辛基三乙氧基硅烷制备超疏水涂料,包括以下步骤:
将1g二氧化钛、0.5g十三氟辛基三乙氧基硅烷、5mL乙酸乙酯混合,加入0.75g聚二甲基硅氧烷与3mL乙酸乙酯的混合液,超声处理15min,在35℃下搅拌20min,加入0.05g聚乙烯亚胺,搅拌40min,得到超疏水涂料;
S7:将超疏水涂料喷涂到封孔铝合金上,70℃固化2h,得到一种耐腐蚀铝合金发动机支架。
实施例2:一种耐腐蚀铝合金发动机支架的加工工艺,包括以下步骤:
S1:取ADC12铝合金为铝合金基体,采用间接式挤压铸造,得到铸件;
间接式挤压铸造的工作条件为:模具材料为SKD61,浇注温度为700℃,模具温度为200℃,空气与支架、空气与模具的传热系数均设置为42W·m-2·K-1;所用压射冲头直径为125mm,挤压比压为100MPa;挤压速度为分段调速,从料饼到浇道中部为第一段,冲头速度为190mm/s;浇道中部到铸件中部为第二段,冲头速度设置为90mm/s;铸件后半部为第三段,冲头速度设置为60mm/s;
S2:将铸件进行双级时效处理,然后依次进行磨砂、抛光、碱洗、酸洗、水洗、干燥,得到预处理铝合金;
双级时效处理的工作条件为:一级时效为:160℃保持6h;二级时效为:140℃保持1h,160℃保持2h,180℃保持6h,160℃保持6h;
碱洗:用15%碳酸氢钠溶液清洗5min;酸洗:用15%硝酸溶液清洗30s;
S3:将预处理铝合金放入电解液中,进行阳极氧化,得到阳极氧化铝合金;
阳极氧化的工作条件为:交流电源为0.8kW,恒定电流为1A,频率为100Hz,时间为2min;阳极氧化所用电解液为:以去离子水为溶剂,其中植酸30mL/L、硫酸5g/L、钼酸钠16g/L、十二烷基苯磺酸钠0.2g/L,温度为130℃;
S4:在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,得到改性铝合金,包括以下步骤:
将1mmol十二烷基硫酸钠、100mL纯水混合,用稀氨水将溶液pH调节至6.5,添加0.1mmol硝酸锌、0.6mmol8-氨基喹啉,混合后加入阳极氧化铝合金浸渍处理,在80℃下保温8h,依次用去离子水、无水乙醇清洗,得到改性铝合金;
S5:将环氧聚硫树脂、磺酸化MXene混合,得到封孔涂料;将封孔涂料涂覆在改性铝合金表面,70℃固化1h,得到封孔铝合金;
以质量份数计,封孔涂料的组成为:12份环氧聚硫树脂、0.2份磺酸化MXene;
环氧聚硫树脂的制备包括以下步骤:将1mmol液态聚硫橡胶、2mmol环氧树脂E44、1mmol1,4-二氧六环混合,加入0.5g聚醚胺、0.1g三乙胺,升温至65℃保温2h,得到环氧聚硫树脂;
磺酸化MXene的制备包括以下步骤:将2g对氨基苯磺酸,1g氢氧化钠、30mL去离子水混合,在2℃加入0.8g硝酸钠,加入10mL30%盐酸,继续搅拌25min,加入0.25gMXene,继续搅拌6h,用孔径为0.22μm的聚四氟乙烯微孔膜抽滤,依次用去离子水、丙酮、乙醇洗涤5-8次,干燥得到磺酸化MXene;
S6:用聚二甲基硅氧烷、二氧化钛、十三氟辛基三乙氧基硅烷制备超疏水涂料,包括以下步骤:
将1g二氧化钛、0.5g十三氟辛基三乙氧基硅烷、5mL乙酸乙酯混合,加入0.75g聚二甲基硅氧烷与3mL乙酸乙酯的混合液,超声处理18min,在35℃下搅拌20min,加入0.05g聚乙烯亚胺,搅拌45min,得到超疏水涂料;
S7:将超疏水涂料喷涂到封孔铝合金上,70℃固化2h,得到一种耐腐蚀铝合金发动机支架。
实施例3:一种耐腐蚀铝合金发动机支架的加工工艺,包括以下步骤:
S1:取ADC12铝合金为铝合金基体,采用间接式挤压铸造,得到铸件;
间接式挤压铸造的工作条件为:模具材料为SKD61,浇注温度为700℃,模具温度为200℃,空气与支架、空气与模具的传热系数均设置为42W·m-2·K-1;所用压射冲头直径为125mm,挤压比压为100MPa;挤压速度为分段调速,从料饼到浇道中部为第一段,冲头速度为190mm/s;浇道中部到铸件中部为第二段,冲头速度设置为90mm/s;铸件后半部为第三段,冲头速度设置为60mm/s;
S2:将铸件进行双级时效处理,然后依次进行磨砂、抛光、碱洗、酸洗、水洗、干燥,得到预处理铝合金;
双级时效处理的工作条件为:一级时效为:160℃保持6h;二级时效为:140℃保持1h,160℃保持2h,180℃保持6h,160℃保持6h;
碱洗:用15%碳酸氢钠溶液清洗5min;酸洗:用15%硝酸溶液清洗30s;
S3:将预处理铝合金放入电解液中,进行阳极氧化,得到阳极氧化铝合金;
阳极氧化的工作条件为:交流电源为0.8kW,恒定电流为1A,频率为100Hz,时间为2min;阳极氧化所用电解液为:以去离子水为溶剂,其中植酸30mL/L、硫酸5g/L、钼酸钠16g/L、十二烷基苯磺酸钠0.2g/L,温度为150℃;
S4:在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,得到改性铝合金,包括以下步骤:
将1mmol十二烷基硫酸钠、100mL纯水混合,用稀氨水将溶液pH调节至6.5,添加0.1mmol硝酸锌、0.6mmol8-氨基喹啉,混合后加入阳极氧化铝合金浸渍处理,在80℃下保温9h,依次用去离子水、无水乙醇清洗,得到改性铝合金;
S5:将环氧聚硫树脂、磺酸化MXene混合,得到封孔涂料;将封孔涂料涂覆在改性铝合金表面,70℃固化1h,得到封孔铝合金;
以质量份数计,封孔涂料的组成为:15份环氧聚硫树脂、0.5份磺酸化MXene;
环氧聚硫树脂的制备包括以下步骤:将1mmol液态聚硫橡胶、2mmol环氧树脂E44、1mmol1,4-二氧六环混合,加入0.5g聚醚胺、0.1g三乙胺,升温至70℃保温2h,得到环氧聚硫树脂;
磺酸化MXene的制备包括以下步骤:将2g对氨基苯磺酸,1g氢氧化钠、30mL去离子水混合,在5℃加入0.8g硝酸钠,加入10mL30%盐酸,继续搅拌30min,加入0.25gMXene,继续搅拌7h,用孔径为0.22μm的聚四氟乙烯微孔膜抽滤,依次用去离子水、丙酮、乙醇洗涤8次,干燥得到磺酸化MXene;
S6:用聚二甲基硅氧烷、二氧化钛、十三氟辛基三乙氧基硅烷制备超疏水涂料,包括以下步骤:
将1g二氧化钛、0.5g十三氟辛基三乙氧基硅烷、5mL乙酸乙酯混合,加入0.75g聚二甲基硅氧烷与3mL乙酸乙酯的混合液,超声处理20min,在35℃下搅拌20min,加入0.05g聚乙烯亚胺,搅拌50min,得到超疏水涂料;
S7:将超疏水涂料喷涂到封孔铝合金上,70℃固化2h,得到一种耐腐蚀铝合金发动机支架。
对比例1:以实施例3为对照组,没有进行双级时效处理,其他工序正常。
对比例2:以实施例3为对照组,没有进行阳极氧化,其他工序正常。
对比例3:以实施例3为对照组,没有在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,其他工序正常。
对比例4:以实施例3为对照组,没有添加8-氨基喹啉,其他工序正常。
对比例5:以实施例3为对照组,用环氧树脂E44替换环氧聚硫树脂,其他工序正常。
对比例6:以实施例3为对照组,没有添加磺酸化MXene,其他工序正常。
对比例7:以实施例3为对照组,没有制备超疏水涂料,其他工序正常。
实施例与对比例中封孔涂料形成的厚度为250µm,超疏水涂料形成的厚度为50µm。
所用原料来源:
ADC12铝合金:以质量分数计,硅11.17%、镁0.28%、铜3.57%、锰0.35%、镍0.17%、锌0.71%,余量为铝;植酸P816024、钼酸钠S817613、十二烷基苯磺酸钠S817805、8-氨基喹啉A800398、液态聚硫橡胶P913287、1,4-二氧六环D807835、聚醚胺P939192、三乙胺T818772、对氨基苯磺酸S817819、聚二甲基硅氧烷D849784、聚乙烯亚胺E808879:麦克林试剂;硝酸锌Z111703:阿拉丁试剂;环氧树脂E44:巴陵石化;MXene(95%):福斯曼科技(北京)有限公司;二氧化钛13463-67-7:南京通盈生物科技有限公司;十三氟辛基三乙氧基硅烷51851-37-7:武汉欣欣佳丽生物科技有限公司;碳酸氢钠、硝酸、硫酸、氨水、无水乙醇、氢氧化钠、硝酸钠、乙酸乙酯,分析纯:国药集团试剂。
性能测试:
显微硬度:采用显微维氏硬度计对样品进行硬度测试;
接触角:采用接触角测量仪对样品表面接触角测试,液滴体积为5µL,测量5次求平均值;
自修复性:在样品表面划出长200µm,深200µm的划痕,在60℃下保温2h,用显微镜观察并记录自修复率;
附着力:采用划格器划格法测定:在样品表面划出均匀网格,确保从划痕露出基体,结果评级:边缘无脱落为0级;交叉受损面积小于5%为1级;交叉受损面积小于15%为2级;交叉受损面积小于35%为3级;交叉受损面积小于65%为4级,余下为5级。
耐盐雾性能:参考GB/T1771-2007测试,盐雾箱内温度35℃,收集到的氯化钠浓度为60g/L,pH为6.8;所得结果如表所示;
本发明提供一种耐腐蚀铝合金发动机支架及其加工工艺,制备了一种高强度、耐腐蚀性好、具有超疏水自修复表面的铝合金发动机支架。
将实施例3与对比例1进行对比可知,采用间接式挤压铸造铸件与双级时效处理,使铸件均质化,从而提高所得铝合金的强度与刚度。
将实施例3与对比例2、对比例3进行对比可知,通过控制阳极氧化的工艺参数,在铝合金表面形成均匀的微米孔洞,然后在其表面原位生成含有氨基喹啉的水滑石层,在提高铝合金表面强度及刚度的同时,且水滑石本身的高孔隙度和粗糙度,与阳极氧化后的铝合金构造微纳米结构表面,大幅改善铝合金表面的抗腐蚀性,且水滑石本身含有的大量羟基基团和金属氢氧化物,从而提高其与铝合金表面的浸润性。
将实施例3与对比例2、对比例3进行对比可知,采用植酸、硫酸作为电解液,构建无磷化电解液,且植酸是一种金属多齿螯合剂,能够与铝合金表面与含有氨基喹啉的水滑石层的金属离子发生络合作用而沉积在基体上,从而增强含有氨基喹啉的水滑石层与铝合金表面的结合力,改善铝合金表面的刚度及强度。
将实施例3与对比例4进行对比可知,基于水滑石作为纳米容器易被阴离子改性修饰,同时具有优异的防腐蚀性能的特点,本发明中以氨基喹啉为插层剂,制备了一种自抗菌、高耐蚀的铝合金表面。
将实施例3与对比例5、对比例6、对比例7进行对比可知,针对现有铝合金支架的耐腐蚀表面在受到机械损伤时,会加速腐蚀,从而降低支架的使用寿命,本发明在含有氨基喹啉的水滑石层的铝合金表面进行纳米孔洞封洞处理,通过调整所用涂料的成分,在改性铝合金表面构建以环氧聚硫树脂与磺酸化MXene为底层,以二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷为表层的双层超疏水自修复涂层。
将实施例3与对比例5进行对比可知,以环氧树脂、聚硫橡胶、三乙胺合成了一种环氧链段为刚性域,聚硫链段为柔性域的嵌段型环氧树脂,其含有的连续二硫片段与磺酸化MXene、含有氨基喹啉的水滑石层中的金属存在金属-二硫键结合,从而赋予其自修复性,且磺酸化MXene中的磺酸基与含有氨基喹啉的水滑石层中的金属离子存在离子-共价键结合,增强网络的复杂度,从而协效增强涂层与水滑石层的结合力。
将实施例3与对比例6进行对比可知,且在涂层底层中引入具有光热转化剂效用的磺酸化MXene来加快其自修复速率,从而增强其自修复性及对高盐高湿等条件下的防腐与保护。
将实施例3与对比例7进行对比可知,在涂层表层中引入二氧化钛、十三氟辛基三乙氧基硅烷、聚二甲基硅氧烷构建一种多级粗糙微纳结构,赋予铝合金表面超疏水、防腐等性能,且二氧化钛的引入有效增强涂层表面的自清洁性,从而大幅提高铝合金支架的使用寿命。
综上所述,本发明制备了一种耐腐蚀铝合金发动机支架,具有良好的应用前景。
以上所述仅为本发明的为实施例,并非因此限制本发明的专利范围,凡是在本发明的发明构思下,利用本发明说明书所做的等效结构变换,或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。
Claims (8)
1.一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,包括以下步骤:
S1:取ADC12铝合金为铝合金基体,采用间接式挤压铸造,得到铸件;
S2:将铸件进行双级时效处理,然后依次进行磨砂、抛光、碱洗、酸洗、水洗、干燥,得到预处理铝合金;
S3:将预处理铝合金放入电解液中,进行阳极氧化,得到阳极氧化铝合金;
S4:在阳极氧化铝合金表面原位生成含有氨基喹啉的水滑石层,得到改性铝合金;
S5:将环氧聚硫树脂、磺酸化MXene混合,得到封孔涂料;将封孔涂料涂覆在改性铝合金表面,固化,得到封孔铝合金;
S6:用二氧化钛、十三氟辛基三乙氧基硅烷、乙酸乙酯、聚二甲基硅氧烷、聚乙烯亚胺制备超疏水涂料;
S7:将超疏水涂料喷涂到封孔铝合金上,固化,得到一种耐腐蚀铝合金发动机支架;
阳极氧化的工作条件为:交流电源为0.8kW,恒定电流为1A,频率为100Hz,时间为2min;阳极氧化所用电解液为:以去离子水为溶剂,其中植酸30mL/L、硫酸5g/L、钼酸钠16g/L、十二烷基苯磺酸钠0.2g/L,温度为120-150℃;
改性铝合金的制备包括以下步骤:将十二烷基硫酸钠、去离子水混合,用氨水将溶液pH调节至6.5,加入硝酸锌、8-氨基喹啉,混合后加入阳极氧化铝合金浸渍处理,在80℃下保温7-9h,依次用去离子水、无水乙醇清洗,得到改性铝合金。
2.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,间接式挤压铸造的工作条件为:模具材料为SKD61,浇注温度为700℃,模具温度为200℃,空气与支架、空气与模具的传热系数均设置为42W·m-2·K-1;所用压射冲头直径为125mm,挤压比压为100MPa;挤压速度为分段调速,从料饼到浇道中部为第一段,冲头速度为190mm/s;浇道中部到铸件中部为第二段,冲头速度为90mm/s;铸件后半部为第三段,冲头速度为60mm/s。
3.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,双级时效处理的工作条件为:一级时效为:160℃保持6h;二级时效为:140℃保持1h,160℃保持2h,180℃保持6h,160℃保持6h。
4.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,以质量份数计,封孔涂料的组成为:10-15份环氧聚硫树脂、0.1-0.5份磺酸化MXene。
5.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,环氧聚硫树脂的制备包括以下步骤:将液态聚硫橡胶、环氧树脂、1,4-二氧六环混合,加入聚醚胺、三乙胺,升温至60-70℃保温2h,得到环氧聚硫树脂。
6.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,磺酸化MXene的制备包括以下步骤:将对氨基苯磺酸、氢氧化钠、去离子水混合,在0-5℃加入硝酸钠,加入盐酸,继续搅拌20-30min,加入MXene,继续搅拌5-7h,用孔径为0.22μm的聚四氟乙烯微孔膜抽滤,依次用去离子水、丙酮、乙醇洗涤5-8次,干燥得到磺酸化MXene。
7.根据权利要求1所述的一种耐腐蚀铝合金发动机支架的加工工艺,其特征在于,超疏水涂料的制备包括以下步骤:
将二氧化钛、十三氟辛基三乙氧基硅烷、乙酸乙酯混合,加入聚二甲基硅氧烷与乙酸乙酯的混合液,超声处理15-20min,在35℃下搅拌20min,加入聚乙烯亚胺,搅拌40-50min,得到超疏水涂料。
8.一种耐腐蚀铝合金发动机支架,其特征在于,由权利要求1-7中任一项加工工艺加工得到。
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