EP2379623A1 - Korrosionsschutzschicht für aluminium- und magnesiumlegierungen - Google Patents
Korrosionsschutzschicht für aluminium- und magnesiumlegierungenInfo
- Publication number
- EP2379623A1 EP2379623A1 EP10700517A EP10700517A EP2379623A1 EP 2379623 A1 EP2379623 A1 EP 2379623A1 EP 10700517 A EP10700517 A EP 10700517A EP 10700517 A EP10700517 A EP 10700517A EP 2379623 A1 EP2379623 A1 EP 2379623A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- corrosion
- composition
- inhibiting
- silane compound
- sol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 114
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 12
- 229910000861 Mg alloy Inorganic materials 0.000 title description 6
- 229910000838 Al alloy Inorganic materials 0.000 title description 4
- 230000007797 corrosion Effects 0.000 claims abstract description 113
- 239000000203 mixture Substances 0.000 claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 33
- -1 silane compound Chemical class 0.000 claims description 78
- 230000002401 inhibitory effect Effects 0.000 claims description 77
- 229910000077 silane Inorganic materials 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 24
- 125000001424 substituent group Chemical group 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- 239000011777 magnesium Substances 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 8
- 239000002105 nanoparticle Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- 125000002252 acyl group Chemical group 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 125000003118 aryl group Chemical group 0.000 claims description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 5
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 3
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 2
- 125000005564 oxazolylene group Chemical group 0.000 claims description 2
- 125000005557 thiazolylene group Chemical group 0.000 claims description 2
- 125000005559 triazolylene group Chemical group 0.000 claims description 2
- LCZAJDWWIXMXSJ-UHFFFAOYSA-N trimethoxy-[3-(1,2,4-triazol-1-yl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCN1C=NC=N1 LCZAJDWWIXMXSJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 29
- 239000002184 metal Substances 0.000 abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000499 gel Substances 0.000 description 31
- 239000010410 layer Substances 0.000 description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 8
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 150000003254 radicals Chemical class 0.000 description 7
- 150000004756 silanes Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000006460 hydrolysis reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000018199 S phase Effects 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000007306 functionalization reaction Methods 0.000 description 4
- 125000002883 imidazolyl group Chemical group 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 239000011253 protective coating Substances 0.000 description 4
- 239000011257 shell material Substances 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 125000003158 alcohol group Chemical group 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 125000001786 isothiazolyl group Chemical group 0.000 description 3
- 125000000842 isoxazolyl group Chemical group 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 125000002971 oxazolyl group Chemical group 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 125000003226 pyrazolyl group Chemical group 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 125000000335 thiazolyl group Chemical group 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- YHBWXWLDOKIVCJ-UHFFFAOYSA-N 2-[2-(2-methoxyethoxy)ethoxy]acetic acid Chemical compound COCCOCCOCC(O)=O YHBWXWLDOKIVCJ-UHFFFAOYSA-N 0.000 description 2
- HCGFUIQPSOCUHI-UHFFFAOYSA-N 2-propan-2-yloxyethanol Chemical compound CC(C)OCCO HCGFUIQPSOCUHI-UHFFFAOYSA-N 0.000 description 2
- NILZGRNPRBIQOG-UHFFFAOYSA-N 3-iodopropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCI NILZGRNPRBIQOG-UHFFFAOYSA-N 0.000 description 2
- LRFVTYWOQMYALW-UHFFFAOYSA-N 9H-xanthine Chemical compound O=C1NC(=O)NC2=C1NC=N2 LRFVTYWOQMYALW-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000012963 UV stabilizer Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000005840 aryl radicals Chemical class 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- FDGQSTZJBFJUBT-UHFFFAOYSA-N hypoxanthine Chemical compound O=C1NC=NC2=C1NC=N2 FDGQSTZJBFJUBT-UHFFFAOYSA-N 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000104 sodium hydride Inorganic materials 0.000 description 2
- 239000012312 sodium hydride Substances 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 125000003831 tetrazolyl group Chemical group 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 125000001399 1,2,3-triazolyl group Chemical group N1N=NC(=C1)* 0.000 description 1
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 1
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Natural products C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000000069 2-butynyl group Chemical group [H]C([H])([H])C#CC([H])([H])* 0.000 description 1
- SKKPKVRWHCKIAK-UHFFFAOYSA-N 2-triethoxysilylethylphosphonic acid Chemical compound CCO[Si](OCC)(OCC)CCP(O)(O)=O SKKPKVRWHCKIAK-UHFFFAOYSA-N 0.000 description 1
- ZPOQJHGXQZVXIO-UHFFFAOYSA-N 3-(1,3-benzothiazol-2-yl)-4-oxo-4-sulfanylbutanoic acid Chemical compound C1=CC=C2SC(C(C(O)=S)CC(=O)O)=NC2=C1 ZPOQJHGXQZVXIO-UHFFFAOYSA-N 0.000 description 1
- LNVWGBOMPSRZFG-UHFFFAOYSA-N 3-(1h-imidazol-2-yl)propyl-trimethoxysilane Chemical compound CO[Si](OC)(OC)CCCC1=NC=CN1 LNVWGBOMPSRZFG-UHFFFAOYSA-N 0.000 description 1
- 125000000474 3-butynyl group Chemical group [H]C#CC([H])([H])C([H])([H])* 0.000 description 1
- LLIFKTIQXYJAHL-UHFFFAOYSA-N 3-imidazol-1-ylpropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCN1C=CN=C1 LLIFKTIQXYJAHL-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- OCVLSHAVSIYKLI-UHFFFAOYSA-N 3h-1,3-thiazole-2-thione Chemical compound SC1=NC=CS1 OCVLSHAVSIYKLI-UHFFFAOYSA-N 0.000 description 1
- LUEYUHCBBXWTQT-UHFFFAOYSA-N 4-phenyl-2h-triazole Chemical compound C1=NNN=C1C1=CC=CC=C1 LUEYUHCBBXWTQT-UHFFFAOYSA-N 0.000 description 1
- NSPMIYGKQJPBQR-UHFFFAOYSA-N 4H-1,2,4-triazole Chemical compound C=1N=CNN=1 NSPMIYGKQJPBQR-UHFFFAOYSA-N 0.000 description 1
- LRUDIIUSNGCQKF-UHFFFAOYSA-N 5-methyl-1H-benzotriazole Chemical compound C1=C(C)C=CC2=NNN=C21 LRUDIIUSNGCQKF-UHFFFAOYSA-N 0.000 description 1
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- 229920000936 Agarose Polymers 0.000 description 1
- 102000009027 Albumins Human genes 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 241000206672 Gelidium Species 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- UGQMRVRMYYASKQ-UHFFFAOYSA-N Hypoxanthine nucleoside Natural products OC1C(O)C(CO)OC1N1C(NC=NC2=O)=C2N=C1 UGQMRVRMYYASKQ-UHFFFAOYSA-N 0.000 description 1
- 229920002774 Maltodextrin Polymers 0.000 description 1
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- IYOOAIJSXOSFTL-UHFFFAOYSA-N OCC(C(=O)OSOP(O)(O)=O)=C=O Chemical compound OCC(C(=O)OSOP(O)(O)=O)=C=O IYOOAIJSXOSFTL-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical group OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- GFFGJBXGBJISGV-UHFFFAOYSA-N adenyl group Chemical group N1=CN=C2N=CNC2=C1N GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 1
- 125000004448 alkyl carbonyl group Chemical group 0.000 description 1
- 125000000304 alkynyl group Chemical group 0.000 description 1
- FWGZLZNGAVBRPW-UHFFFAOYSA-N alumane;strontium Chemical compound [AlH3].[Sr] FWGZLZNGAVBRPW-UHFFFAOYSA-N 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229940111121 antirheumatic drug quinolines Drugs 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 125000003943 azolyl group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 description 1
- 125000004604 benzisothiazolyl group Chemical group S1N=C(C2=C1C=CC=C2)* 0.000 description 1
- 125000004603 benzisoxazolyl group Chemical group O1N=C(C2=C1C=CC=C2)* 0.000 description 1
- 125000001164 benzothiazolyl group Chemical group S1C(=NC2=C1C=CC=C2)* 0.000 description 1
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- BSDOQSMQCZQLDV-UHFFFAOYSA-N butan-1-olate;zirconium(4+) Chemical compound [Zr+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] BSDOQSMQCZQLDV-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001727 carbonic acid monoesters Chemical class 0.000 description 1
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- 125000004093 cyano group Chemical group *C#N 0.000 description 1
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- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
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- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
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- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
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- 235000019832 sodium triphosphate Nutrition 0.000 description 1
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- 150000003455 sulfinic acids Chemical class 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
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- 229920002994 synthetic fiber Polymers 0.000 description 1
- 150000003566 thiocarboxylic acids Chemical class 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- WOZZOSDBXABUFO-UHFFFAOYSA-N tri(butan-2-yloxy)alumane Chemical compound [Al+3].CCC(C)[O-].CCC(C)[O-].CCC(C)[O-] WOZZOSDBXABUFO-UHFFFAOYSA-N 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
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- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- FJVOQPCCHVJZTR-UHFFFAOYSA-L zinc;5-nitrobenzene-1,3-dicarboxylate Chemical compound [Zn+2].[O-]C(=O)C1=CC(C([O-])=O)=CC([N+]([O-])=O)=C1 FJVOQPCCHVJZTR-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the invention relates to a composition for the corrosion protection of metallic substrates and its preparation and to a process for the production of corrosion-resistant coatings.
- Corrosion on a metallic material leads to a change in the properties of the metal, which results in a reduction in quality and thus significant functional impairments of the material or the technical system of which it forms a part, entails.
- Corrosion phenomena can manifest themselves as cracks, holes, hollows or surface wall thickness reductions on the material.
- Corrosion arises, for example, by electrochemical or chemical interaction between the metallic material and its environment and can, inter alia, by condensation, high humidity, seawater, but also by dirt and gas components in the air, such as SO 2 , salts and hygroscopic dust or by residues of Chlorides, sulfides, sulfates or acids are triggered.
- Light metals such as magnesium and aluminum and alloys of these metals are used, especially in the automotive, aerospace industry, more and more components made of magnesium, aluminum or corresponding alloys are used, since they allow high strength with low weight.
- such materials require a particularly effective corrosion protection.
- lacquers and / or electroplated layers which form a barrier between the metal and the surroundings are generally used.
- the corrosion resistance of magnesium and aluminum and their alloys can be improved, for example, by anodizing.
- Other possibilities for improving the corrosion resistance of such materials are the application of chemical conversion coatings, for example by chromating or zinc phosphating.
- Sol-gel based protective coatings can be applied to the metal surface by simple coating techniques such as dipping, spinning or spraying.
- Sol-gel anticorrosive coatings for aluminum and titanium alloys based on ZrO 2 / SiO 2 precursors are commercially available and described, for example, in U.S. Patent 5,814,137.
- Tetraethoxysilane and phosphonatoethyltriethoxysilane reacts with the surface of the magnesium alloy and increases both the adhesion and the barrier effect of the coating.
- ZrO 2 / CeO 2 -based SoI-GeI anticorrosive coatings have been reported by Phani et al. (Mater Corros, 2005, 56, 77).
- Another approach to aluminum alloy corrosion protection based on a self-assembling nanophase particle (SNAP) process has been described by Vreugdenhil et al. published by J. Coat. Technof., 2001, 56, 77).
- a So! Gel coating which additionally contains a corrosion-inhibiting substance which can be selectively released at the corrosion site, is described by Zheludkevich et al. (Chem. Mater. 2007, 19, 402)).
- silica gel nanoparticles impregnated with the corrosion inhibitor benzotriazole are added to the sol-gel material. This inhibiting substance can be released in the formation of microdefects and major injuries and protect any unprotected metal surfaces or metallic interfaces from corrosion.
- a disadvantage of the aforementioned coating is often the low adhesion to the metallic substrate or the large layer thicknesses, which lead in particular in aircraft to undesirable weight of the components.
- An object of the present invention is to provide a composition which improves the corrosion resistance of a metallic substrate.
- Another object of the present invention is to provide a corrosion-resistant coating with a small layer thickness.
- a solution according to the invention consists in a corrosion-inhibiting composition which comprises a sol-gel material and at least one corrosion-inhibiting silane compound.
- the corrosion-inhibiting silane compound can be linked to the sol-gel network via covalent bonds and thus also ensures a stable coating even in the case of mechanical damage to the corrosion protection layer.
- the covalent attachment of the corrosion-inhibiting substance to the sol-gel network also prevents leaching or bleeding and ensures even distribution.
- a corrosion inhibiting silane compound which can be incorporated into the network of a sol-gel coating.
- a corrosion inhibiting protective coating and its use for protecting a metallic substrate against corrosion.
- a process for the production of a corrosion-inhibiting protective coating is provided in which optionally commercially available matrix materials can be used, which reduces the production costs and thus lowers the production costs.
- Fig. 1 shows salt spray tests of metallic substrates with a corrosion inhibiting coating according to the present invention.
- corrosion describes any change of the metal which leads to an oxidation in the corresponding metal cation, wherein metal oxides, carbonates, sulfites, sulfates or even sulfides are formed, which may be optionally hydrated.
- a "corrosion inhibiting substance" in the present invention is a chemical substance which has the ability to reduce the corrosion rate when present in sufficient concentration in a corrosive system.
- metal substrate is to be understood as meaning any substrate which consists entirely of metal or at least has a metallic layer on its surface.
- metal and metal include not only pure metals, but also mixtures of metals and metal alloys, wherein these metals or metal alloys are preferably susceptible to corrosion.
- composition of the present invention may be applied to metallic substrates including, for example, a metal selected from iron, aluminum, magnesium, zinc, silver and copper, although the scope of the present invention is not limited to these metals.
- Metal alloys which may particularly benefit from the present invention are, for example, steel and brass as well as aluminum and magnesium containing alloys, in particular the composition according to the invention is particularly suitable for the protection of the particular Corrosion-sensitive light metals magnesium and aluminum and their alloys or for the protection of materials containing these light metals.
- a corrosion inhibiting composition in the context of the present invention a mixture of compounds which can be used to produce a corrosion inhibiting coating on a metallic substrate
- corrosion inhibiting coating refers to those applied to the metallic substrate and cured protective layer.
- the corrosion-inhibiting composition comprises a sol-gel material, wherein the sol-gel material contains at least one corrosion-inhibiting silane compound.
- the corrosion inhibiting composition may comprise additional additional components.
- Sol-gel matehals are synthesized, for example, by hydrolysis of metal or semimetal alkoxides, in the case of alkoxysilane precursors using an acid (eg, HCl) or a base (eg, NH 3 ) as a catalyst.
- an acid eg, HCl
- a base eg, NH 3
- M is a metal or Si and R usually represents an alkyl group (C n H 2n + I ) or the like.
- alkoxysilane compounds examples include tetraalkoxysilanes, aryltrialkoxysilanes, alkenyltrialkoxysilanes, glycidoxyalkyltrialkoxysilanes, aminoalkyltrialkoxysilanes and (meth) acryltrialkoxysilanes, and mixtures thereof. Particularly preferred are methyltrimethoxysilane,
- the properties of the coating can be increased by adding silicon-free precursors.
- silicon-free precursors examples of these are organometallic compounds such as tetra-iso-propoxytitanium, tri-isopropoxyaluminum, tri-sec-butoxyaluminum, tetrabutoxyzirconium and tetrapropoxysiloxane.
- the sol-gel matrix small particles such.
- metal oxides metal carbides and metal nitrides are added. Suitable materials are, for example, SiC, Si 3 N 4 , Al 2 O 3, ZrO 2 , TiO 2 or SiO 2.
- a small particle size increases the dispersibility and thus makes it possible to heal layer defects.
- nanoparticles can increase the scratch resistance of the corrosion-inhibiting coating, enhance its barrier to corrosive media, and improve the adhesion of primer or topcoats.
- the particles may be functionalized if necessary. The functionalization can be carried out, for example, by chemo-mechanical processes during the milling of the particles.
- a suitable for the functionalization of nanoparticles compound is z.
- constituents which can be added to the sol-gel matrix are, for example, dyes or pigments for coloring.
- the degree of crosslinking influences the mechanical properties of the coating.
- the mechanical properties may optionally be further adjusted via organofunctional silanes capable of forming an organic network in addition to the inorganic network.
- Non-crosslinking functional groups such as e.g., alkyl or phenyl groups can increase the flexibility of the system.
- the hydrolysis of the sol-gei-forming components can be done by the addition of water.
- the processing properties of the So! Gel material can be adjusted via solvents and additives.
- Suitable solvents are, for example, ethanol, isopropanol, 1-butanol, buthoxyethanol, butyl acetate, isopropoxyethanol and glycol.
- the additives can, for example Wetting agents, leveling agents, foam suppressants, dispersing agents, UV stabilizers and silicones and condensation catalysts such as acids or bases include.
- the finished sol can also be provided with organic polymers.
- the sol-gel material is prepared from methyltrimethoxysilane, tetraethoxysilane, ethanol and isopropanol, wherein the hydrolysis is effected by adding water and 85% phosphoric acid.
- the at least one corrosion-inhibiting silane compound is added to the final sol-gel material and the mixture is stirred for several hours, e.g. for 1 to 8 hours, 2 to 6 hours or 4 hours. In another embodiment, the at least one corrosion-inhibiting silane compound is added to the reaction mixture with the sol-gel forming components prior to hydrolysis.
- Preferred corrosion inhibiting coatings have excellent adhesion to the substrate. Ideally, this can be accomplished by allowing the metal atoms of an underlying metallic substrate to form covalent bonds with the sol-gel matrix compounds, e.g. in the case of silanes Si-O-M bonds can be formed. If the sol-gel layer additionally contains non-silicate assemblies, covalent bonds between them and the metal atoms are also possible.
- the corrosion-inhibiting composition comprises at least one corrosion-inhibiting silane compound.
- the at least one corrosion-inhibiting silane compound has the general formula (I)
- substituents R 1 may be the same or different and are selected from the group comprising hydrogen, alkyl, alkenyl, aikinyl, acyl or aryl, the substituent R 2 is a nitrogen-containing, optionally substituted heterocyclic radical, x is 0, 1 or 2 is and n is an integer> 0.
- Alkyl radicals include optionally substituted, straight-chain, branched or cyclic radicals having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, and especially lower alkyl radicals having 1 to 6, preferably 1 to 4 carbon atoms. Specific examples are methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, isobutyl, n-pentyl, n-hexyl, dodecyl, octadecyl and cyclohexyl.
- Alkenyl and alkynyl radicals may optionally comprise substituted, straight-chain or branched radicals having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms and especially lower alkyl radicals having 1 to 6, preferably 1 to 4 carbon atoms.
- alkenyl radicals are AiIyI, 1-methylprop-2-en-1-yl, 2-methylprop-2-en-1-yl, but-2-en-1-yl, but-3-ene-1 -yl, 1-methylbut-3-en-1-yl and 1-methyl-but-2-en-1-yl.
- alkynyl radicals are propynyl, but-2-yn-1-yl, but-3-yn-1-yl and 1-methyl-but-3-yn-1-yl.
- Acyl radicals may optionally comprise substituted radicals of organic acids which formally arise by cleavage of an OH group from the organic acid, for example radicals of a carboxylic acid or radicals derived therefrom such as the thiocarboxylic acid, optionally N-substituted iminocarboxylic acids or the radicals of
- Carbonic acid monoesters optionally N-substituted carbamic acids, sulfonic acids, sulfinic acids, phosphonic acids, phosphinic acids.
- Aryl radicals may optionally comprise substituted mono-, bi- or polycyclic aromatic systems, for example phenyl, naphthyl,
- the substituents R 1 are independently selected from the group comprising hydrogen, alkyl, acyl or aryl. More preferably, the substituents R 1 are independently selected from the group comprising methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, n-pentyl, n-hexy! , Dodecyl, octadecyl and cyclohexyl. Particularly preferred is methyl.
- Suitable nitrogen-containing, heterocyclic radicals are, for example, azolyls.
- the substituent R 2 is selected from the group consisting of tetrazolylene, triazolylene, pyrazolylene, imidazolylene, isoxazolylene, oxazolylene, isothiazolylene and thiazolylene.
- tetrazolyls are 1H, 2H or 5H-tetrazolyl or 5-substituted tetrazolyls, e.g. 5-methyltetrazolyl or 5-phenyltetrazolyl.
- triazolyls are 1, 2,3-triazolyl or 4- and / or 5-substituted-1,2,3-triazolyls, e.g. Benzotriazolyl, 4-phenyl-1,2,3-triazole, 1,2-naphthotriazolyl, 5-methylbenzotriazolyl or 4-nitrobenzotriazolyl.
- pyrazolyls are pyrazolyl itself or 3-, 4- and / or 5- substituted pyrazolyls such as 3,5-dimethylpyrazolyl, 6-nitroindazolyl, A-benzylpyrazolyl, 4,5-dimethylpyrazoly! or 3-allylpyrazolyl.
- imidazolyls are imidazolyl itself or 2-, 4- and / or 5-substituted imidazolyls, such as adenyl, guanyl, benzimidazolyl, 5-methylbenzimidazolyl, 2-phenylimidazolyl, 2-benzylimidazoiyl, A-
- Specific examples of isoxazolyls are isoxazolyl itself or 3-, A- and 7- or 5-substituted isoxazolyls, e.g. 3-mercaptoisoxazolyl, 3-mercaptobenzisoxazolyl or benzisoxazolyl. Special examples for
- Oxazolyls are oxazolyl itself or 2-, A- and / or 5-substituted oxazolyls, e.g. 2-mercaptooxazolyl or 2-mercaptobenzoxazolyi.
- isothiazolyls are isothiazolyl itself or 3-, A- and / or 5-substituted isothiazolyls, e.g. 3-mercaptoisothiazolyl, 3-mercaptobenzisothiazolyl or benzisothiazolyl.
- Specific examples of thiazolyls are thiazolyl itself or 2-, 4- and / or 5-substituted thiazolyls, e.g. 2-mercaptothiazolyl, 2-mercaptobenzotiazolyl or benzothiazolyl.
- nitrogen-containing, heterocyclic radicals are, for example, pyridinyls, pyrimidinyls, quinolines or indolyls, which may optionally be further substituted.
- the at least one corrosion-inhibiting silane compound has the general formula (I)
- R 1 O 3 - ⁇ (R 1 ) ⁇ Si (CH 2 ) n -CH 2 -R 2 (I), wherein the substituents R 1 may be the same or different and are selected from the group comprising hydrogen, alkyl, acyl or aryl (as defined herein), the substituent R 2 is an optionally substituted imidazolyl (as defined herein), x is 0, 1 or 2 and n is an integer> 0.
- alkyl, alkenyl, alkynyl, acyl or aryl radicals and the nitrogen-containing, heterocyclic radicals may optionally be substituted and, for example, one or more substituents from the group of halogens such as F, Cl and Br or acryloxy, amino, amide, Aldehyde, alkoxy, alkoxycarbonyl, alkylcarbonyl, carboxy, cyano, epoxy, hydroxy, keto, methacryloxy, mercapto, phosphoric acid, sulfonic acid or vinyl groups.
- halogens such as F, Cl and Br or acryloxy, amino, amide, Aldehyde, alkoxy, alkoxycarbonyl, alkylcarbonyl, carboxy, cyano, epoxy, hydroxy, keto, methacryloxy, mercapto, phosphoric acid, sulfonic acid or vinyl groups.
- n is an integer between 0 and 10, or between 1 and 8.
- n is an integer between 2 and 4.
- the substituent R 2 is connected via a nitrogen atom to the (R 1 O) 3 - ⁇ (R 1 ) ⁇ Si (CH 2 ) n -CH 2 radical.
- the substituent R 2 may also be linked to the (R 1 O) 3 . ⁇ (R 1 ) ⁇ Si (CH 2 ) ⁇ -CH 2 radical via another heteroatom or a C atom.
- the at least one corrosion-inhibiting silane compound is linked to the sol-gel network via covalent bonds. In another embodiment, the at least one corrosion-inhibiting silane compound is not linked to the sol-gel network via covalent bonds.
- the at least one corrosion-inhibiting silane compound is selected from the group consisting of N-Trimethoxysilypropylimidazol, 1 N-trimethoxysilylpropyl-1, 2,4-triazole and 4N-trimethoxysilylpropyl-1, 2,4-triazo! and mixtures thereof.
- the corrosion inhibiting protective coating of the present invention is also useful for protecting materials from intergranular corrosion. This type of corrosion can occur with materials that form intermetallic phases, and arises when the intermetallic phases on the
- Grain boundaries or grain boundaries near seams have a significantly lower corrosion potential than the surrounding metal matrix.
- intermetallic phases may form in alloys of aluminum, magnesium and copper, and a majority of these intermetallic phases may consist of S phases having a defined Al 2 MgCu composition. These phases are selectively dissolved at the beginning of the corrosion reaction, thereby enriched in copper and then form a cathode with respect to the surrounding metal matrix.
- AiMgCu alloy begins the corrosive attack on the S phases by dissolving magnesium and aluminum. This dissolution process locally enriches copper at the edges of the dissolving S-phase regions, causing further corrosion as the effective surface area of the cathodic zones increases.
- the corrosion-inhibiting silane compound can prevent corrosion on AlMgCu alloys by suppressing the dissolution of the S phases as well as the deposition of copper.
- the nitrogen-containing group of the silane compound can be absorbed at metal centers of the intermetallic phases and thus make it difficult to dissolve out metallic constituents.
- the at least one corrosion-inhibiting silane compound may be contained in the anticorrosive composition in an amount of from 0.1 to 90% by weight based on the weight of the composition.
- the at least one corrosion-inhibiting Siiantress in an amount of 0.2 to 80 wt .-%, 0.5 to 40 wt .-%, 1 to 20 wt .-%, 2 to 10 wt .-% or 3 to 5 Wt .-% based on the weight of the composition.
- the corrosion inhibiting composition contains only one corrosion inhibiting silane compound. In another embodiment, the corrosion inhibiting composition contains a mixture of different corrosion inhibiting silane compounds. In a specific embodiment, the corrosion inhibiting composition contains only corrosion inhibiting silane compounds linked to the sol-gel network via covalent bonds. In another specific embodiment, the corrosion inhibiting composition contains only corrosion inhibiting silane compounds that are not linked to the sol-gel network via covalent bonds. In another specific embodiment, the corrosion-inhibiting composition contains mixtures of corrosion-inhibiting silane compounds, some of which are linked to the sol-gel network via covalent bonds, and partially not.
- the corrosion inhibiting composition may comprise, in addition to the sol-gel material containing at least one corrosion inhibiting silane compound, additional optional components selected from the group comprising nanoparticles, dyes, solvents, and additives (as defined herein).
- the corrosion inhibiting composition may additionally comprise nanoparticles of metal oxides, metal carbides and metal nitrides. Suitable materials are, for example, SiC, Si 3 N 4 , Al 2 O 3 , ZrO 2 , TiO 2 or SiO 2 .
- the particles may also be functionalized. The functionalization can be carried out, for example, by chemo-mechanical processes during the milling of the particles.
- a suitable for the functionalization of nanoparticles compound is z.
- the processing properties of the corrosion-inhibiting composition can be adjusted via solvents and additives.
- solvents e.g. Ethanol, isopropanol, 1-butanol, buthoxyethanol, butyl acetate, isopropoxyethanol and glycol.
- the additives may include, for example, wetting agents, leveling agents,
- Anti-foaming agents include acids or bases.
- the corrosion inhibiting composition comprises, in addition to the sol-gel material containing at least one corrosion-inhibiting silane compound, at least one further corrosion-inhibiting non-silane compound.
- a "corrosion-inhibiting non-silane compound” is a compound which has a corrosion-inhibiting effect but contains no silicon-organic constituents
- suitable corrosion-inhibiting non-silane compounds are organic, corrosion-inhibiting active compounds, such as, for example, benzotriazole, 5-methylbenzotriazole , 2-mercaptothiazole, mercaptobenzimidazole, mercaptobenzothiazole, 8-hydroxyquinoline, succinic acid, 2-benzothiazolylthiosuccinic acid or zinc 5-nitroisophthalate, and also inorganic, corrosion inhibiting agents, such as strontium aluminum tripolyphosphate or zinc phosphate.
- the at least one corrosion inhibiting non-silane compound may be microencapsulated.
- shell materials for the microcapsules natural, semi-synthetic or synthetic materials may be used. Natural shell materials include gum arabic, agar-agar, agarose, maltodextrins, fats and fatty acids, cetyl alcohol, collagen, chitosan, lecithins, gelatin, albumin, shellac, polysaccharides, polypeptides, sucrose or waxes.
- semi-synthetic shell materials are chemically modified celluloses, for example cellulose acetate, ethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose and carboxymethylcellulose or starch derivatives.
- polymers such as polyacrylates, polyamides, polyurethanes or polyureas can be used as synthetic shell materials.
- a method of protecting a metallic substrate from corrosion comprising providing a metallic substrate, providing a corrosion inhibiting composition comprising a sol-gel material, wherein the sol-GeI material contains at least one corrosion-inhibiting silane compound, the application of the Composition on the substrate, and curing of the composition.
- the composition can be applied by conventional application methods such as dipping, spinning, flooding, brushing or spraying.
- the coating can be cured thermally, for example at a temperature between 60 0 C and 18O 0 C, preferably at about 120 0 C.
- the coating can alternatively or additionally be cured by irradiation, for example with UV light, infrared or the like.
- the coating is adjusted to a layer thickness between 0.1 .mu.m and 100 .mu.m, preferably to a layer thickness between 0.2 .mu.m and 50 .mu.m or between 0.5 .mu.m and 10 .mu.m. Particularly preferred is the
- Layer thickness between 1 ⁇ m and 5 ⁇ m or between 3 ⁇ m and 4 ⁇ m. By multiple coating, layer thickness and corrosion resistance can optionally be further increased.
- the substrate is pretreated prior to application of the corrosion inhibiting composition.
- the substrate is first cleaned and then etched or pickled. Suitable agents for cleaning are, for example, ethanol / surfactant mixtures or alkaline cleaning agents, such as Ardrox 6376 (Chemetall GmbH).
- the etching or acid pickling of the substrate can be carried out, for example, with an aqueous solution which is 5 G ⁇ W .-% sodium nitrate in 20 wt .-% acetic acid or with commercially available pickling, such as Ardrox 1277 or Gardoclean T5497 (Chemetall GmbH).
- the surface of the substrate is fundamentally conditioned by briefly immersing the substrate in an alkaline cleaning bath.
- a cover layer also called a "top coat” is additionally applied to the cured, corrosion-inhibiting coating Suitable as the cover layer are, for example, polyurethane- or epoxy-based coatings.
- a base layer also called “primer” is additionally applied to the hardened, corrosion-inhibiting coating (SoI-GeI layer) .
- SoI-GeI layer hardened, corrosion-inhibiting coating
- an epoxide-based primer is suitable.
- the substrates of the magnesium alloy AZ31 were degreased in an ethanol / surfactant mixture in an ultrasonic bath for 5 min and then in an aqueous solution containing 5 wt .-% sodium nitrate in 20 wt .-%
- the application of the corrosion-inhibiting composition was carried out by dip coating at a dipping speed of 20 cm / min.
- the resulting films were dried at room temperature for 30 minutes and cured at 120 ° C. for one hour.
- the coated substrates showed only a very low outgassing in the hydrogen test in contact with 5% saline solution in the period of one week.
- the results of the salt spray test are shown in Figure 1, with the left panel showing the condition of the coating after 24 hours, the center figure after 96 hours and the right figure after 168 hours.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009005105.8A DE102009005105B4 (de) | 2009-01-19 | 2009-01-19 | Korrosionshemmende Zusammensetzung für Aluminium- und Magnesiumlegierungen und ihre Verwendung, Verfahren zum Korrosionsschutz sowie korrosionsbeständiges Substrat |
| PCT/EP2010/050090 WO2010081757A1 (de) | 2009-01-19 | 2010-01-07 | Korrosionsschutzschicht für aluminium- und magnesiumlegierungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2379623A1 true EP2379623A1 (de) | 2011-10-26 |
Family
ID=42060930
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10700517A Withdrawn EP2379623A1 (de) | 2009-01-19 | 2010-01-07 | Korrosionsschutzschicht für aluminium- und magnesiumlegierungen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8361627B2 (de) |
| EP (1) | EP2379623A1 (de) |
| DE (1) | DE102009005105B4 (de) |
| WO (1) | WO2010081757A1 (de) |
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|---|---|---|---|---|
| KR101189812B1 (ko) | 2011-02-10 | 2012-10-11 | 아로 주식회사 | 마그네슘 소재로 이루어진 휴대폰 케이스의 도장용 페인트 조성물 및 이의 제조방법, 이를 이용한 표면처리방법 |
| US9028603B2 (en) * | 2011-06-09 | 2015-05-12 | The Research Foundation Of State University Of New York | Anti-fouling coating compositions and methods for preventing the fouling of surfaces |
| DE102012001912A1 (de) | 2011-12-22 | 2013-06-27 | Eads Deutschland Gmbh | Selbstreinigende und superhydrophobe Oberflächen auf Basis von TiO2-Nanotubes |
| US10370765B2 (en) * | 2013-03-16 | 2019-08-06 | Prc-Desoto International, Inc. | Corrosion inhibiting sol-gel compositions |
| US10280770B2 (en) | 2014-10-09 | 2019-05-07 | Rolls-Royce Corporation | Coating system including oxide nanoparticles in oxide matrix |
| US10047614B2 (en) | 2014-10-09 | 2018-08-14 | Rolls-Royce Corporation | Coating system including alternating layers of amorphous silica and amorphous silicon nitride |
| US20180087162A1 (en) * | 2016-09-23 | 2018-03-29 | The Boeing Company | Corrosion resistant surface treatment and primer system for aluminum aircraft using chromium-free inhibitors |
| KR102405049B1 (ko) * | 2017-04-07 | 2022-06-02 | 시코쿠가세이고교가부시키가이샤 | 트리아졸실란 화합물, 당해 화합물의 합성 방법 및 그의 이용 |
| US11939490B2 (en) | 2017-07-31 | 2024-03-26 | Momentive Performance Materials Inc. | Curable surface-protective coating composition, processes for its preparation and application to a metallic substrate and resulting coated metallic substrate |
| CN111108111B (zh) * | 2017-09-22 | 2023-05-02 | 四国化成工业株式会社 | 四唑硅烷化合物、该化合物的合成方法及其利用 |
| WO2020145952A1 (en) * | 2019-01-09 | 2020-07-16 | Hewlett-Packard Development Company, L.P. | Housings for electronic devices |
| US12091430B2 (en) | 2019-09-06 | 2024-09-17 | Shikoku Chemicals Corporation | Metal surface treatment liquid and liquid concentrate thereof, metal surface treatment liquid set, metal surface treatment method, and method for manufacturing printed wiring board |
| KR20230035338A (ko) * | 2020-07-01 | 2023-03-13 | 케이블 코팅스 리미티드 | 가공 전도체 코팅용 조성물 |
| US20250331107A1 (en) | 2021-12-28 | 2025-10-23 | Shikoku Chemicals Corporation | Organic film and method for producing same |
| EP4459006A4 (de) | 2021-12-28 | 2025-12-24 | Shikoku Chem | Oberflächenbehandlungsflüssigkeit für metall |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4618688A (en) * | 1985-04-12 | 1986-10-21 | Scm Corporation | Silane compositions |
| US5200237A (en) * | 1990-10-01 | 1993-04-06 | Associated Universities, Inc. | Solid-gel precursor solutions and methods for the fabrication of polymetallicsiloxane coating films |
| JPH0768256B2 (ja) * | 1991-08-01 | 1995-07-26 | 株式会社ジャパンエナジー | 新規イミダゾールシラン化合物及びその製造方法並びにそれを用いる金属表面処理剤 |
| US5814137A (en) * | 1996-11-04 | 1998-09-29 | The Boeing Company | Sol for coating metals |
| IL159222A0 (en) * | 2001-06-28 | 2004-06-01 | Algat Sherutey Gimur Teufati | Method of anodizing of magnesium and magnesium alloys and producing conductive layers on an anodized surface |
| JP5211693B2 (ja) | 2005-05-31 | 2013-06-12 | 日東紡績株式会社 | 有機シラン化合物とホウ素化合物からなる高分子 |
| JP2008133334A (ja) | 2006-11-28 | 2008-06-12 | Nitto Boseki Co Ltd | イミダゾールシラン含有防錆剤 |
-
2009
- 2009-01-19 DE DE102009005105.8A patent/DE102009005105B4/de not_active Expired - Fee Related
-
2010
- 2010-01-07 EP EP10700517A patent/EP2379623A1/de not_active Withdrawn
- 2010-01-07 US US13/145,154 patent/US8361627B2/en active Active
- 2010-01-07 WO PCT/EP2010/050090 patent/WO2010081757A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2010081757A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120021232A1 (en) | 2012-01-26 |
| DE102009005105A1 (de) | 2010-07-22 |
| US8361627B2 (en) | 2013-01-29 |
| DE102009005105B4 (de) | 2015-12-31 |
| WO2010081757A1 (de) | 2010-07-22 |
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