JP6332603B2 - Rust preventive composition - Google Patents
Rust preventive composition Download PDFInfo
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- JP6332603B2 JP6332603B2 JP2014033064A JP2014033064A JP6332603B2 JP 6332603 B2 JP6332603 B2 JP 6332603B2 JP 2014033064 A JP2014033064 A JP 2014033064A JP 2014033064 A JP2014033064 A JP 2014033064A JP 6332603 B2 JP6332603 B2 JP 6332603B2
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- Japan
- Prior art keywords
- component
- rust
- rust preventive
- composition
- sodium
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims description 56
- 230000003449 preventive effect Effects 0.000 title claims description 31
- 239000000203 mixture Substances 0.000 title claims description 29
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000872 buffer Substances 0.000 claims description 9
- 239000003112 inhibitor Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 7
- BJEPYKJPYRNKOW-UHFFFAOYSA-N malic acid Chemical compound OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 7
- 235000013923 monosodium glutamate Nutrition 0.000 claims description 7
- 229940073490 sodium glutamate Drugs 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 5
- 239000007979 citrate buffer Substances 0.000 claims description 5
- 229940049920 malate Drugs 0.000 claims description 5
- 239000004317 sodium nitrate Substances 0.000 claims description 5
- 235000010344 sodium nitrate Nutrition 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 12
- 239000007788 liquid Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 9
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 7
- 239000012964 benzotriazole Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000007654 immersion Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008363 phosphate buffer Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000006172 buffering agent Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- YASYEJJMZJALEJ-UHFFFAOYSA-N Citric acid monohydrate Chemical compound O.OC(=O)CC(O)(C(O)=O)CC(O)=O YASYEJJMZJALEJ-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 229960002303 citric acid monohydrate Drugs 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- KDXKERNSBIXSRK-UHFFFAOYSA-N lysine Chemical compound NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 239000001630 malic acid Substances 0.000 description 2
- 235000011090 malic acid Nutrition 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 235000019265 sodium DL-malate Nutrition 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- WPUMTJGUQUYPIV-UHFFFAOYSA-L sodium malate Chemical compound [Na+].[Na+].[O-]C(=O)C(O)CC([O-])=O WPUMTJGUQUYPIV-UHFFFAOYSA-L 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 2
- 229940038773 trisodium citrate Drugs 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- ASOKPJOREAFHNY-UHFFFAOYSA-N 1-Hydroxybenzotriazole Chemical compound C1=CC=C2N(O)N=NC2=C1 ASOKPJOREAFHNY-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- ZDFKSZDMHJHQHS-UHFFFAOYSA-N 2-tert-butylbenzoic acid Chemical compound CC(C)(C)C1=CC=CC=C1C(O)=O ZDFKSZDMHJHQHS-UHFFFAOYSA-N 0.000 description 1
- NSFXVRRBGNORBD-UHFFFAOYSA-N 2h-benzo[f]benzotriazole Chemical compound C1=C2C=CC=CC2=CC2=NNN=C21 NSFXVRRBGNORBD-UHFFFAOYSA-N 0.000 description 1
- UTMDJGPRCLQPBT-UHFFFAOYSA-N 4-nitro-1h-1,2,3-benzotriazole Chemical compound [O-][N+](=O)C1=CC=CC2=NNN=C12 UTMDJGPRCLQPBT-UHFFFAOYSA-N 0.000 description 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- AGPKZVBTJJNPAG-UHFFFAOYSA-N Isoleucine Chemical compound CCC(C)C(N)C(O)=O AGPKZVBTJJNPAG-UHFFFAOYSA-N 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 1
- MBRWCWLPAQMJQG-UHFFFAOYSA-M NC(C(=O)[O-])C(CC)C.[K+] Chemical compound NC(C(=O)[O-])C(CC)C.[K+] MBRWCWLPAQMJQG-UHFFFAOYSA-M 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000003704 aspartic acid Nutrition 0.000 description 1
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- YKZPPPNXRZHVGX-PXYKVGKMSA-L dipotassium;(2s)-2-aminobutanedioate;hydron;hydrate Chemical compound [H+].[H+].O.[K+].[K+].[O-]C(=O)[C@@H](N)CC([O-])=O.[O-]C(=O)[C@@H](N)CC([O-])=O YKZPPPNXRZHVGX-PXYKVGKMSA-L 0.000 description 1
- WDRWZVWLVBXVOI-QTNFYWBSSA-L dipotassium;(2s)-2-aminopentanedioate Chemical compound [K+].[K+].[O-]C(=O)[C@@H](N)CCC([O-])=O WDRWZVWLVBXVOI-QTNFYWBSSA-L 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000013919 monopotassium glutamate Nutrition 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940068988 potassium aspartate Drugs 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000004299 sodium benzoate Substances 0.000 description 1
- 235000010234 sodium benzoate Nutrition 0.000 description 1
- WTWSHHITWMVLBX-DKWTVANSSA-M sodium;(2s)-2-aminobutanedioate;hydron Chemical compound [Na+].[O-]C(=O)[C@@H](N)CC(O)=O WTWSHHITWMVLBX-DKWTVANSSA-M 0.000 description 1
- PBDAWQLIMPWEEF-UHFFFAOYSA-M sodium;2,6-diaminohexanoate Chemical compound [Na+].NCCCCC(N)C([O-])=O PBDAWQLIMPWEEF-UHFFFAOYSA-M 0.000 description 1
- NQZACQYNHPSSFV-UHFFFAOYSA-M sodium;2-amino-3-methylpentanoate Chemical compound [Na+].CCC(C)C(N)C([O-])=O NQZACQYNHPSSFV-UHFFFAOYSA-M 0.000 description 1
- KTTMJIJHZNYOFB-UHFFFAOYSA-M sodium;4-tert-butylbenzoate Chemical compound [Na+].CC(C)(C)C1=CC=C(C([O-])=O)C=C1 KTTMJIJHZNYOFB-UHFFFAOYSA-M 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
本発明は、特にアルミニウムまたはその合金に対して防錆効果を有する防錆剤組成物に関するものである。 The present invention relates to a rust preventive composition having a rust preventive effect particularly on aluminum or an alloy thereof.
引用文献1には、トリアゾール類を含む防錆剤組成物が非鉄金属に対して防錆効果があると記載されている。しかしながら、アルミニウムまたはアルミニウム合金を対象にしておらず、常温における防錆試験を行っているのみである。 Cited Document 1 describes that a rust inhibitor composition containing triazoles has a rust preventive effect on non-ferrous metals. However, it does not target aluminum or an aluminum alloy, and only performs a rust prevention test at room temperature.
引用文献2には、ベンゾトリアゾールと水溶性アミンの付加塩とt−ブチル安息香酸と水溶性アミンの付加塩を合成して添加している。付加塩として用いることで溶解性が向上する旨が記載されている。しかしながら、溶解性を必要としている理由は、引用文献2の発明を直接クーラントに投入するからであり、溶解した状態でクーラントに添加すれば付加塩にする必要は無い。また、リン酸系緩衝剤を用いており、昨今の環境汚染を発生させる恐れがある。 In Cited Document 2, an addition salt of benzotriazole and a water-soluble amine, and an addition salt of t-butylbenzoic acid and a water-soluble amine are synthesized and added. It is described that the solubility is improved by using it as an addition salt. However, the reason why the solubility is required is that the invention of Patent Document 2 is directly added to the coolant, and if added to the coolant in a dissolved state, there is no need to make an addition salt. In addition, a phosphate buffer is used, which may cause recent environmental pollution.
従来は、腐食しやすいアルミニウムやその合金に対して防錆効果が発現しにくく、特にリン酸系緩衝剤を用いていない防錆剤組成物では、90℃雰囲気に放置する高温雰囲気などの信頼性試験では腐食が進みやすやすく、防錆効果を維持することが困難であった。 Conventionally, anticorrosive effect is hard to be exhibited against aluminum and its alloys which are easily corroded, and particularly in a rust preventive composition which does not use a phosphate buffer, reliability such as a high temperature atmosphere left in an atmosphere of 90 ° C. In the test, corrosion easily proceeds and it was difficult to maintain the rust prevention effect.
本発明者らは、上記目的を達成するべく鋭意検討した結果、防錆剤組成物に関する本発明を完成するに至った。 As a result of intensive studies to achieve the above object, the present inventors have completed the present invention relating to a rust preventive composition.
本発明の要旨を次に説明する。本発明の第一の実施態様は、(A)〜(C)成分を含み、(C)成分が(C−1)〜(C−4)成分を含む防錆剤組成物である。
(A)成分:媒体
(B)成分:緩衝剤
(C)成分:防錆剤
(C−1)成分:1分子中にカルボン酸とアミンを有する化合物および/またはその塩
(C−2)成分:下記の一般式1の化学構造を有する化合物および/またはその誘導体
(C−3)成分:下記の一般式2の化学構造を有する化合物および/またはその誘導体
(C−4)成分:硝酸塩
The gist of the present invention will be described next. The first embodiment of the present invention is a rust preventive composition containing the components (A) to (C) and the component (C) containing the components (C-1) to (C-4).
(A) component: medium (B) component: buffer (C) component: rust inhibitor (C-1) component: a compound having a carboxylic acid and an amine in the molecule and / or a salt thereof (C-2) component : Compound having chemical structure of general formula 1 and / or its derivative (C-3) component: Compound having chemical structure of general formula 2 and / or its derivative (C-4) component: nitrate
本発明の第二の実施態様は、(B)成分が、クエン酸系緩衝剤またはリンゴ酸系緩衝剤である第一の実施態様に記載の防錆剤組成物である。 The second embodiment of the present invention is the rust inhibitor composition according to the first embodiment, wherein the component (B) is a citrate buffer or a malate buffer.
本発明の第三の実施態様は、クーラント添加剤として用いられる第一又は第二の実施態様に記載の防錆剤組成物である。 The third embodiment of the present invention is the rust inhibitor composition according to the first or second embodiment used as a coolant additive.
本発明の第四の実施態様は、アルミニウム合金製ラジエタに用いられる第一又は第二の実施態様に記載の防錆剤組成物である。 A fourth embodiment of the present invention is the rust preventive composition according to the first or second embodiment used for an aluminum alloy radiator.
本発明は、腐食しやすいアルミニウムやその合金に対して防錆効果が発現し、リン酸系緩衝剤を用いていなくても、90℃などの高温雰囲気でも防錆効果を維持する防錆剤組成物である。本発明は、アルミニウムまたはその合金製のラジエタのクーラントに添加することができ、信頼性試験後も錆の発生を抑制する。
The present invention provides a rust preventive composition that exhibits a rust preventive effect on corrosive aluminum and its alloys, and maintains a rust preventive effect even in a high-temperature atmosphere such as 90 ° C. without using a phosphate buffer. It is a thing. The present invention can be added to a radiator coolant made of aluminum or an alloy thereof, and suppresses the generation of rust even after a reliability test.
本発明の詳細を次に説明する。本発明で使用することができる(A)成分としては、各成分を溶解させる媒体であり、好ましくは組成物を透明で均一にする媒体である。特に好ましくは、親水性を有する媒体であり、1種類を単独で使用しても、2種類以上を混合して使用しても良い。 Details of the present invention will be described below. The component (A) that can be used in the present invention is a medium in which each component is dissolved, and preferably a medium that makes the composition transparent and uniform. Particularly preferred is a medium having hydrophilicity, and one kind may be used alone, or two or more kinds may be mixed and used.
(A)成分の具体例としては、イオン交換水、エチレングリコール、ジエチレングリコール、トリエチレングリコール、プロピレングリコール、1,3−プロパンジオール、1,3−ブタンジオール、1,5−ペンタンジオール、ヘキシレングリコールなどが挙げられるが、これらに限定されるものではない。 Specific examples of the component (A) include ion exchange water, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,5-pentanediol, hexylene glycol. However, it is not limited to these.
本発明で使用することができる(B)成分としては、緩衝剤である。緩衝剤は、少量の酸や塩基を加えたり、多少濃度が変化したりしてもpHが大きく変化しないようにする緩衝作用を有する溶液を指す。 The component (B) that can be used in the present invention is a buffer. The buffering agent refers to a solution having a buffering action that prevents the pH from changing greatly even if a small amount of acid or base is added or the concentration slightly changes.
緩衝剤の具体例としては、リン酸系緩衝剤、クエン酸系緩衝剤、リンゴ酸系緩衝剤などが知られている。環境汚染を配慮すると、特に好ましくはクエン酸系緩衝剤、リンゴ酸系緩衝剤である。クエン酸系緩衝剤としては、クエン酸一水和物とクエン酸三ナトリウムを質量比で1:4に混合した溶液などが知られ、リンゴ酸系緩衝剤としては、リンゴ酸とリンゴ酸二ナトリウムを質量比で1:4に混合した溶液などが知られているが、これらに限定されるものではない。(B)成分は媒体に溶解させた状態で(A)成分に添加しても、(B)成分をそのまま(A)成分に添加しても良い。 Specific examples of the buffer include a phosphate buffer, a citrate buffer, a malate buffer, and the like. In consideration of environmental pollution, a citrate buffer and a malate buffer are particularly preferable. Known examples of the citrate buffer include a solution in which citric acid monohydrate and trisodium citrate are mixed at a mass ratio of 1: 4. Malate buffer includes malic acid and disodium malate. A solution in which 1: 4 is mixed at a mass ratio is known, but is not limited thereto. The component (B) may be added to the component (A) in a state dissolved in the medium, or the component (B) may be added to the component (A) as it is.
(A)成分100質量部に対して、(B)成分は0.1〜5.0質量部添加されていることが好ましい。0.1質量部以上であれば、pHを安定化させることができる。一方、5.0質量部以下であれば、防錆剤組成物に発生する白濁や沈降が抑制できる。 It is preferable that 0.1-5.0 mass parts of (B) component is added with respect to 100 mass parts of (A) component. If it is 0.1 mass part or more, pH can be stabilized. On the other hand, if it is 5.0 mass parts or less, the cloudiness and sedimentation which generate | occur | produce in a rust preventive agent composition can be suppressed.
本発明で使用することができる(C)成分としては、特定の防錆剤の組み合わせであり、具体的には下記の(C−1)〜(C−4)成分の組み合わせである。また、防錆剤組成物の特性を低下させない範囲で、(C)成分以外の防錆剤を添加することもできる。 The component (C) that can be used in the present invention is a combination of specific rust preventives, and specifically, the combination of the following components (C-1) to (C-4). Moreover, rust preventives other than (C) component can also be added in the range which does not reduce the characteristic of a rust preventive composition.
(C−1)成分としては、1分子中にカルボン酸とアミンを有する化合物および/またはその塩である。1種類を単独で使用しても、2種類以上を混合して使用しても良い。(C−1)成分の具体例としては、グルタミン酸、グルタミン酸ナトリウム、グルタミン酸カリウム、アスパラギン酸、アスパラギン酸ナトリウム、アスパラギン酸カリウム、2,6−ジアミノヘキサン酸、2,6−ジアミノヘキサン酸ナトリウム、2,6−ジアミノヘキサン酸カリウム、2−アミノ−3−メチル吉草酸、2−アミノ−3−メチル吉草酸ナトリウム、2−アミノ−3−メチル吉草酸カリウムなどが挙げられるが、これに限定されるものではない。 The component (C-1) is a compound having a carboxylic acid and an amine in one molecule and / or a salt thereof. One type may be used alone, or two or more types may be mixed and used. Specific examples of the component (C-1) include glutamic acid, sodium glutamate, potassium glutamate, aspartic acid, sodium aspartate, potassium aspartate, 2,6-diaminohexanoic acid, sodium 2,6-diaminohexanoate, 2, Examples include, but are not limited to, potassium 6-diaminohexanoate, 2-amino-3-methylvaleric acid, sodium 2-amino-3-methylvalerate, potassium 2-amino-3-methylvalerate, etc. is not.
(C−2)成分としては、一般式1の化学構造を有する化合物および/またはその誘導体である。1種類を単独で使用しても、2種類以上を混合して使用しても良い。(C−2)の具体例としては、ベンゾチアゾール、2−メルカプトベンゾチアゾールなどが挙げられるが、これらに限定されるものではない。 The component (C-2) is a compound having a chemical structure of the general formula 1 and / or a derivative thereof. One type may be used alone, or two or more types may be mixed and used. Specific examples of (C-2) include benzothiazole and 2-mercaptobenzothiazole, but are not limited thereto.
(C−3)成分としては一般式2の化学構造を有する化合物および/またはその誘導体である。ここで、一般式2のRは水素または有機基を示す。1種類を単独で使用しても、2種類以上を混合して使用しても良い。(C−3)成分の具体例としては、ベンゾトリアゾール、1−ヒドロキシベンゾトリアゾール、1H−ナフト[2,3−d]トリアゾール、4−ニトロベンゾトリアゾールなどが挙げられるが、これに限定されるものではない。 The component (C-3) is a compound having a chemical structure of the general formula 2 and / or a derivative thereof. Here, R in the general formula 2 represents hydrogen or an organic group. One type may be used alone, or two or more types may be mixed and used. Specific examples of the component (C-3) include, but are not limited to, benzotriazole, 1-hydroxybenzotriazole, 1H-naphtho [2,3-d] triazole, and 4-nitrobenzotriazole. is not.
(C−4)成分としては硝酸塩である。1種類を単独で使用しても、2種類以上を混合して使用しても良い。(C−4)成分の具体例としては、硝酸ナトリウム、硝酸マグネシウム、硝酸カルシウム、硝酸カリウム、硝酸ストロンチウム、硝酸アルミニウムなどが挙げられるが、これに限定されるものではない。
(A)成分100質量部に対して、(C)成分の合計が0.1〜20質量部添加されていることが好ましい。0.1質量部以上であれば、防錆効果が発現する。一方、20質量部以下であれば、防錆剤組成物に発生する白濁や沈降が抑制できる。また、(C−1)〜(C−4)成分の比率として、(C−1)成分:(C−2)成分:(C−3)成分:(C−4)成分=1:0.5〜1.5:0.05〜0.3:0.5〜1.5であることが好ましい。 It is preferable that 0.1-20 mass parts of total of (C) component is added with respect to 100 mass parts of (A) component. If it is 0.1 mass part or more, a rust prevention effect will express. On the other hand, if it is 20 mass parts or less, the cloudiness and sedimentation which generate | occur | produce in a rust preventive agent composition can be suppressed. In addition, as a ratio of the components (C-1) to (C-4), (C-1) component: (C-2) component: (C-3) component: (C-4) component = 1: 0. It is preferable that it is 5-1.5: 0.05-0.3: 0.5-1.5.
防錆剤組成物の最適なpHとしては7.00〜8.00であることが好ましい。当該範囲であれば、防錆剤組成物を高温雰囲気下で放置する際に沈降や白濁が発生しない。 The optimum pH of the rust preventive composition is preferably 7.00 to 8.00. If it is the said range, when leaving a rust preventive composition in a high temperature atmosphere, sedimentation and white turbidity do not generate | occur | produce.
本発明の防錆剤組成物は、ラジエタ等に充填されるクーラントの添加剤として使用することができ、ラジエタなどの配管内部の金属腐食を防止することができる。特にアルミニウムやアルミニウム合金製のラジエタに使用することができる。 The rust inhibitor composition of the present invention can be used as an additive for a coolant filled in a radiator or the like, and can prevent metal corrosion inside a pipe such as a radiator. In particular, it can be used for a radiator made of aluminum or aluminum alloy.
本発明の防錆剤組成物には、本発明の特性を損なわない範囲において顔料、染料などの着色剤、金属粉、炭酸カルシウム、タルク、シリカ、アルミナ、水酸化アルミニウム等の無機充填剤、難燃剤、有機充填剤、可塑剤、酸化防止剤、消泡剤、レベリング剤、レオロジーコントロール剤等の添加剤を適量配合しても良い。これらの添加により作業性・保存性等に優れた組成物およびその硬化物が得られる。
The rust preventive composition of the present invention includes pigments, dyes and other colorants, metal powders, calcium carbonate, talc, silica, alumina, aluminum hydroxide and other inorganic fillers within the range that does not impair the characteristics of the present invention. An appropriate amount of additives such as a flame retardant, an organic filler, a plasticizer, an antioxidant, an antifoaming agent, a leveling agent, and a rheology control agent may be blended. By adding these, a composition excellent in workability and storage stability and a cured product thereof can be obtained.
次に実施例を挙げて本発明を更に詳細に説明するが、本発明はこれらの実施例のみに限定されるものではない。(以下、防錆剤組成物を単に組成物と呼ぶ。) EXAMPLES Next, although an Example is given and this invention is demonstrated further in detail, this invention is not limited only to these Examples. (Hereinafter, the rust inhibitor composition is simply referred to as a composition.)
[参考1〜17、実施例1と2および比較例1〜6]
組成物を調製するために下記の成分を準備した。
(A)成分:媒体
・エチレングリコール(株式会社ゴードー製)
・イオン交換水(共栄製薬株式会社製)
(B)成分:緩衝剤
・緩衝剤1(クエン酸一水和物:クエン酸三ナトリウム=1:4(質量比))
・緩衝剤2(リンゴ酸:リンゴ酸二ナトリウム=1:4(質量比))
(C)成分:防錆剤
・グルタミン酸ナトリウム(試薬)
・ベンゾチアゾール(試薬)
・ベンゾトリアゾール(試薬)
・硝酸ナトリウム(試薬)
その他の防錆剤
・安息香酸ナトリウム(試薬)
・p−tert−ブチル安息香酸ナトリウム(試薬)
・マレイン酸(試薬)
・アジピン酸(試薬)
・ヘプタン酸(試薬)
・ステアリン酸(試薬)
・サリチル酸(試薬)
・ノナン酸(試薬)
・グルタミン酸ナトリウム(試薬)
・ベンゾチアゾール(試薬)
・ベンゾトリアゾール(試薬)
その他の成分
・アセチレン系消泡剤(オルフィンSPC 日信化学工業株式会社製)
[References 1 to 17, Examples 1 and 2 and Comparative Examples 1 to 6]
The following ingredients were prepared to prepare the composition.
(A) component: Medium, ethylene glycol (manufactured by Gordo Co., Ltd.)
・ Ion exchange water (manufactured by Kyoei Pharmaceutical Co., Ltd.)
Component (B): Buffering agent / Buffering agent 1 (citric acid monohydrate: trisodium citrate = 1: 4 (mass ratio))
Buffer 2 (malic acid: disodium malate = 1: 4 (mass ratio))
Component (C): Rust preventive agent / Sodium glutamate (reagent)
・ Benzothiazole (reagent)
・ Benzotriazole (reagent)
・ Sodium nitrate (reagent)
Other rust preventives, sodium benzoate (reagent)
・ Sodium p-tert-butylbenzoate (reagent)
・ Maleic acid (reagent)
・ Adipic acid (reagent)
・ Heptanoic acid (reagent)
・ Stearic acid (reagent)
・ Salicylic acid (reagent)
・ Nonanoic acid (reagent)
・ Sodium glutamate (reagent)
・ Benzothiazole (reagent)
・ Benzotriazole (reagent)
Other ingredients, acetylene-based antifoaming agent (Olfin SPC, manufactured by Nissin Chemical Industry Co., Ltd.)
参考1〜17を調整するため、(A)成分と(B)成分を秤量して、60分間攪拌して(B)成分を溶解させる。その後、(C)成分またはその他の防錆剤、その他成分を秤量した後、60分間攪拌を行う。詳細な調製量は表1に従い、数値は全て質量部で表記する。
参考1〜17に対して、腐食試験を行った。また、各試験の点数の合計を「総合評価」として記載した。その結果を表2にまとめた。 Corrosion tests were performed on References 1-17. In addition, the total score of each test was described as “overall evaluation”. The results are summarized in Table 2.
[腐食試験]
JIS K2234に記載の腐食液(1Lのイオン交換水に、硫酸ナトリウムを148mg、塩化ナトリウムを165mg、炭酸水素ナトリウムを138mg加えた溶液)を使用し、腐食液に対して組成物を2質量%添加して浸漬液とする。試験片としてアルミニウム、ステンレス、鉄、銅をそれぞれ浸漬液に浸漬して、媒体が揮発しない様に密封した状態で、25℃雰囲気下で300時間放置した。その後、試験片を取り出し乾燥させて、下記の評価基準により目視で試験片表面の腐食を確認する。それぞれの金属の確認結果を「アルミニウム」、「ステンレス」、「鉄」、「銅」と記載する。
評価基準
○(2点):試験片表面に錆が見られない
△(1点):試験片表面に部分的に錆が見られる
×(0点):試験片全体的に錆が発生している。
Use the corrosive liquid described in JIS K2234 (1L ion-exchanged water, 148mg sodium sulfate, 165mg sodium chloride, 138mg sodium bicarbonate) and add 2% by mass of the composition to the corrosive liquid. To make an immersion liquid. Aluminum, stainless steel, iron, and copper were immersed in the immersion liquid as test pieces, respectively, and allowed to stand in an atmosphere at 25 ° C. for 300 hours in a sealed state so that the medium did not volatilize. Thereafter, the test piece is taken out and dried, and the corrosion of the test piece surface is visually confirmed according to the following evaluation criteria. The confirmation results of each metal are described as “aluminum”, “stainless steel”, “iron”, and “copper”.
Evaluation criteria ○ (2 points): No rust is observed on the surface of the test piece △ (1 point): Partial rust is seen on the surface of the test piece × (0 points): Rust is generated on the entire test piece Yes.
防錆剤を1種類用いた参考1〜11は、4種類の金属の中で少なくとも1種類の金属に錆が発生した。防錆剤を2種類用いた参考12においても、4種類の金属の中で鉄に錆が発生した。防錆剤を3種類用いた参考13〜17においては、防錆剤としてグルタミン酸ナトリウム、ベンゾチアゾール、ベンゾトリアゾールを組み合わせた参考17のみが25℃放置で錆が発生しなかった。 In References 1 to 11 using one kind of rust preventive agent, rust occurred on at least one kind of metal among the four kinds of metals. In Reference 12 using two types of rust preventives, rust was generated in iron among the four types of metals. In References 13 to 17 using three kinds of rust preventives, only Reference 17 combining sodium glutamate, benzothiazole and benzotriazole as rust preventives did not generate rust when left at 25 ° C.
実施例1と2および比較例1〜6を調整するため、(A)成分、(B)成分、(C)成分またはその他の防錆剤、その他成分を混合した後、60分間攪拌を行う。詳細な調製量は表3に従い、数値は全て質量部で表記する。
実施例1と2および比較例1〜6に対して、90℃促進試験後の腐食試験と90℃促進試験後の外観確認を行った。また、各試験の点数の合計を「総合評価」として記載した。その結果を表4にまとめた。 For Examples 1 and 2 and Comparative Examples 1 to 6, a corrosion test after the 90 ° C. accelerated test and an appearance confirmation after the 90 ° C. accelerated test were performed. In addition, the total score of each test was described as “overall evaluation”. The results are summarized in Table 4.
[90℃促進試験後の腐食試験]
JIS K2234に記載の腐食液(1Lのイオン交換水に、硫酸ナトリウムを148mg、塩化ナトリウムを165mg、炭酸水素ナトリウムを138mg加えた溶液)を使用し、腐食液に対して組成物を2質量%添加して「浸漬液」とする。試験片としてアルミニウム、ステンレス、鉄、銅をそれぞれ浸漬液に浸漬して、試験片としてアルミニウム、ステンレス、鉄、銅をそれぞれ浸漬して、媒体が揮発しない様に密封した状態で、90℃雰囲気下で300時間放置した。その後、試験片を取り出し乾燥させて、下記の評価基準により目視で試験片表面の腐食を確認する。それぞれの金属の確認結果を「アルミニウム」、「ステンレス」、「鉄」、「銅」と記載する。
評価基準
○(2点):試験片表面に錆が見られない
△(1点):試験片表面に部分的に錆が見られる
×(0点):試験片全体的に錆が発生している
[Corrosion test after 90 ° C accelerated test]
Use the corrosive liquid described in JIS K2234 (1L ion-exchanged water, 148mg sodium sulfate, 165mg sodium chloride, 138mg sodium bicarbonate) and add 2% by mass of the composition to the corrosive liquid. This is referred to as “immersion liquid”. In a 90 ° C atmosphere, aluminum, stainless steel, iron, and copper are immersed in the immersion liquid as test pieces, and aluminum, stainless steel, iron, and copper are immersed as test pieces in a sealed state so that the medium does not volatilize. And left for 300 hours. Thereafter, the test piece is taken out and dried, and the corrosion of the test piece surface is visually confirmed according to the following evaluation criteria. The confirmation results of each metal are described as “aluminum”, “stainless steel”, “iron”, and “copper”.
Evaluation criteria ○ (2 points): No rust is observed on the surface of the test piece △ (1 point): Partial rust is seen on the surface of the test piece × (0 points): Rust is generated on the entire test piece Have
[90℃促進試験後の外観確認]
90℃促進試験後の腐食試験の浸漬液について沈殿又は白濁発生の有無を目視により確認し、下記の評価基準により判断し、確認結果を「外観」と記載する。
評価基準
○(2点):浸漬液に沈殿又は白濁発生が無い
×(0点):浸漬液に沈殿又は白濁発生が有る
The immersion liquid in the corrosion test after the 90 ° C. accelerated test is visually checked for the presence or absence of precipitation or cloudiness, judged according to the following evaluation criteria, and the confirmation result is described as “appearance”.
Evaluation criteria ○ (2 points): There is no precipitation or cloudiness in the immersion liquid. × (0 points): There is precipitation or cloudiness in the immersion liquid.
(C)成分としてグルタミン酸ナトリウム、ベンゾチアゾール、ベンゾトリアゾールを組み合わせた比較例1は、90℃雰囲気に放置すると金属に錆が発生しなかったものの、外観に問題があることが確認された。白濁や沈殿が発生する原因は明確ではないが、化学的に大きく変化していることが推測されるため、組成物の状態としては良い状態とは言えない。一方、グルタミン酸ナトリウム、ベンゾチアゾール、ベンゾトリアゾールに対してさらに硝酸ナトリウムを追加した実施例1、2においては、錆も白濁や沈殿が発生せず総合評価が最も良く、(B)成分を変えても同様の作用効果が発現した。(C)成分として硝酸ナトリウムを添加して、他の防錆剤を変えた比較例2〜6は外観に問題があると共に金属にアルミニウムに錆が発生する傾向が見られる。 In Comparative Example 1 in which sodium glutamate, benzothiazole, and benzotriazole were combined as the component (C), it was confirmed that there was a problem in appearance although rust did not occur in the metal when left in an atmosphere at 90 ° C. The cause of the occurrence of white turbidity and precipitation is not clear, but since it is presumed that the chemical has greatly changed, it cannot be said that the composition is in a good state. On the other hand, in Examples 1 and 2 in which sodium nitrate was further added to sodium glutamate, benzothiazole, and benzotriazole, rust did not cause white turbidity or precipitation, and the overall evaluation was the best. Even if component (B) was changed, Similar effects were manifested. In Comparative Examples 2 to 6 in which sodium nitrate was added as the component (C) and other rust preventives were changed, there was a problem in appearance and a tendency for rust to be generated in the metal was observed.
近年、アルミニウムまたはアルミニウム合金が、車輌の軽量化の観点から使用されることがある。しかしながら、当該金属は腐食し易いという問題点が有り、車輌に使用するに当たっては腐食を抑制することが重要である。本発明の防錆効果であれば、クーラント添加剤に限らず、他の用途にも使用できる防錆剤組成物である。 In recent years, aluminum or aluminum alloys are sometimes used from the viewpoint of weight reduction of vehicles. However, there is a problem that the metal is easily corroded, and it is important to suppress corrosion when used in a vehicle. If it is the rust preventive effect of this invention, it is a rust preventive composition which can be used not only for a coolant additive but for another use.
Claims (3)
(A)成分:媒体
(B)成分:クエン酸系緩衝剤またはリンゴ酸系緩衝剤
(C)成分:防錆剤
(C−1)成分:グルタミン酸ナトリウム
(C−2)成分:下記の式1の化学構造を有する化合物
(C−3)成分:下記の一般式2の化学構造を有する化合物
(一般式2の中で、Rは水素を示す)
(C−4)成分:硝酸ナトリウム
A rust inhibitor composition comprising (A) to (C) components, wherein the (C) component comprises (C-1) to (C-4) components.
(A) component: medium (B) component: citrate buffer or malate buffer (C) component: rust inhibitor (C-1) component: sodium glutamate (C-2) component: Formula 1 below A compound having the chemical structure
(C-3) Component: Compound having the chemical structure of the following general formula 2
(In general formula 2, R represents hydrogen)
(C-4) Component: Sodium nitrate
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