CN113846329A - Corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water - Google Patents
Corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water Download PDFInfo
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- CN113846329A CN113846329A CN202111133128.1A CN202111133128A CN113846329A CN 113846329 A CN113846329 A CN 113846329A CN 202111133128 A CN202111133128 A CN 202111133128A CN 113846329 A CN113846329 A CN 113846329A
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- Prior art keywords
- salt
- corrosion
- calcium
- inhibitor composition
- corrosion inhibitor
- Prior art date
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- 230000007797 corrosion Effects 0.000 title claims abstract description 154
- 238000005260 corrosion Methods 0.000 title claims abstract description 154
- 239000000203 mixture Substances 0.000 title claims abstract description 97
- 239000003112 inhibitor Substances 0.000 title claims abstract description 71
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 33
- 239000010962 carbon steel Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 23
- -1 halide salt Chemical class 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 131
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000126 substance Substances 0.000 claims abstract description 49
- 239000007864 aqueous solution Substances 0.000 claims abstract description 42
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 36
- 150000003839 salts Chemical class 0.000 claims abstract description 32
- 239000012267 brine Substances 0.000 claims abstract description 28
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 28
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims abstract description 24
- 239000002585 base Substances 0.000 claims abstract description 21
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000174 gluconic acid Substances 0.000 claims abstract description 16
- 235000012208 gluconic acid Nutrition 0.000 claims abstract description 16
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 15
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 15
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 15
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 9
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 150000001413 amino acids Chemical class 0.000 claims abstract description 8
- 150000004820 halides Chemical class 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 4
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 36
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 33
- 239000001110 calcium chloride Substances 0.000 claims description 23
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 23
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 22
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 20
- 229910003002 lithium salt Inorganic materials 0.000 claims description 17
- 159000000002 lithium salts Chemical class 0.000 claims description 17
- 159000000003 magnesium salts Chemical class 0.000 claims description 17
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 17
- 159000000000 sodium salts Chemical class 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 16
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 16
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- 150000004677 hydrates Chemical class 0.000 claims description 15
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 14
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 14
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 claims description 14
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 14
- PXAJQJMDEXJWFB-UHFFFAOYSA-N acetone oxime Chemical compound CC(C)=NO PXAJQJMDEXJWFB-UHFFFAOYSA-N 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000004471 Glycine Substances 0.000 claims description 11
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 11
- 239000012964 benzotriazole Substances 0.000 claims description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 11
- 159000000007 calcium salts Chemical class 0.000 claims description 11
- 239000011780 sodium chloride Substances 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 235000010376 calcium ascorbate Nutrition 0.000 claims description 8
- 229940047036 calcium ascorbate Drugs 0.000 claims description 8
- 239000011692 calcium ascorbate Substances 0.000 claims description 8
- 239000004227 calcium gluconate Substances 0.000 claims description 8
- 229960004494 calcium gluconate Drugs 0.000 claims description 8
- 235000013927 calcium gluconate Nutrition 0.000 claims description 8
- BLORRZQTHNGFTI-ZZMNMWMASA-L calcium-L-ascorbate Chemical compound [Ca+2].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] BLORRZQTHNGFTI-ZZMNMWMASA-L 0.000 claims description 8
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 claims description 8
- 229910001622 calcium bromide Inorganic materials 0.000 claims description 7
- FNAQSUUGMSOBHW-UHFFFAOYSA-H calcium citrate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FNAQSUUGMSOBHW-UHFFFAOYSA-H 0.000 claims description 7
- 239000001354 calcium citrate Substances 0.000 claims description 7
- WGEFECGEFUFIQW-UHFFFAOYSA-L calcium dibromide Chemical compound [Ca+2].[Br-].[Br-] WGEFECGEFUFIQW-UHFFFAOYSA-L 0.000 claims description 7
- OFNJDDJDXNMTHZ-UHFFFAOYSA-L calcium;2-aminoacetate Chemical compound [Ca+2].NCC([O-])=O.NCC([O-])=O OFNJDDJDXNMTHZ-UHFFFAOYSA-L 0.000 claims description 7
- 235000010350 erythorbic acid Nutrition 0.000 claims description 7
- OTCKOJUMXQWKQG-UHFFFAOYSA-L magnesium bromide Chemical compound [Mg+2].[Br-].[Br-] OTCKOJUMXQWKQG-UHFFFAOYSA-L 0.000 claims description 7
- 229910001623 magnesium bromide Inorganic materials 0.000 claims description 7
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 7
- 239000001103 potassium chloride Substances 0.000 claims description 7
- 235000011164 potassium chloride Nutrition 0.000 claims description 7
- 235000013337 tricalcium citrate Nutrition 0.000 claims description 7
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 claims description 6
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 6
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-isoascorbic acid Chemical compound OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 claims description 6
- 229940026239 isoascorbic acid Drugs 0.000 claims description 6
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 claims description 5
- ZKALVNREMFLWAN-VOTSOKGWSA-N (ne)-n-(4-methylpentan-2-ylidene)hydroxylamine Chemical compound CC(C)C\C(C)=N\O ZKALVNREMFLWAN-VOTSOKGWSA-N 0.000 claims description 3
- DODWVZSLOOEOKB-UHFFFAOYSA-N 1-benzothiophene-2-thiol Chemical compound C1=CC=C2SC(S)=CC2=C1 DODWVZSLOOEOKB-UHFFFAOYSA-N 0.000 claims description 3
- BLZKSRBAQDZAIX-UHFFFAOYSA-N 2-methyl-1-benzothiophene Chemical compound C1=CC=C2SC(C)=CC2=C1 BLZKSRBAQDZAIX-UHFFFAOYSA-N 0.000 claims description 3
- NNRAOBUKHNZQFX-UHFFFAOYSA-N 2H-benzotriazole-4-thiol Chemical compound SC1=CC=CC2=C1NN=N2 NNRAOBUKHNZQFX-UHFFFAOYSA-N 0.000 claims description 3
- KFJDQPJLANOOOB-UHFFFAOYSA-N 2h-benzotriazole-4-carboxylic acid Chemical compound OC(=O)C1=CC=CC2=NNN=C12 KFJDQPJLANOOOB-UHFFFAOYSA-N 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- NEEHYRZPVYRGPP-IYEMJOQQSA-L calcium gluconate Chemical compound [Ca+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O NEEHYRZPVYRGPP-IYEMJOQQSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- PFKGDYCESFRMAP-UHFFFAOYSA-L dicalcium citrate Chemical compound [Ca+2].[O-]C(=O)CC(O)(C(=O)O)CC([O-])=O PFKGDYCESFRMAP-UHFFFAOYSA-L 0.000 claims description 3
- JGUQDUKBUKFFRO-CIIODKQPSA-N dimethylglyoxime Chemical compound O/N=C(/C)\C(\C)=N\O JGUQDUKBUKFFRO-CIIODKQPSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 21
- 230000005764 inhibitory process Effects 0.000 description 19
- 229910045601 alloy Inorganic materials 0.000 description 17
- 239000000956 alloy Substances 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- 150000002739 metals Chemical class 0.000 description 16
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 206010007269 Carcinogenicity Diseases 0.000 description 2
- 230000007670 carcinogenicity Effects 0.000 description 2
- 231100000260 carcinogenicity Toxicity 0.000 description 2
- 229940071264 lithium citrate Drugs 0.000 description 2
- WJSIUCDMWSDDCE-UHFFFAOYSA-K lithium citrate (anhydrous) Chemical compound [Li+].[Li+].[Li+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O WJSIUCDMWSDDCE-UHFFFAOYSA-K 0.000 description 2
- 229940071260 lithium gluconate Drugs 0.000 description 2
- ZOTSUVWAEYHZRI-JJKGCWMISA-M lithium;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Li+].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O ZOTSUVWAEYHZRI-JJKGCWMISA-M 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229940026231 erythorbate Drugs 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229940050410 gluconate Drugs 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- WALYXZANOBBHCI-UHFFFAOYSA-K magnesium sodium trichloride hydrate Chemical compound O.[Cl-].[Na+].[Mg+2].[Cl-].[Cl-] WALYXZANOBBHCI-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- MFXMOUUKFMDYLM-UHFFFAOYSA-L zinc;dihydrogen phosphate Chemical compound [Zn+2].OP(O)([O-])=O.OP(O)([O-])=O MFXMOUUKFMDYLM-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water. The corrosion inhibitor composition has the characteristics of high efficiency, environmental protection and solid state. The corrosion inhibitor composition comprises a base material and auxiliary materials according to the mass percentage. The base material consists of one of chloride and bromide or a mixture of the chloride and the bromide. The auxiliary materials comprise at least two or more than two mixtures of benzo-heterocycle substances, ketoxime substances, gluconic acid and salt substances thereof, ascorbic acid and salt substances thereof, citric acid and salt substances thereof, amino acid and salt substances thereof, and alkali or alkaline oxides. The corrosion inhibitor composition with the halide brine content of 0.5-15 percent by mass can obviously inhibit the corrosion of the halide brine to the carbon steel. The corrosion inhibitor composition can be directly prepared into an aqueous solution with the mass percent of 20-80 percent, and can also obviously inhibit the corrosion of carbon steel.
Description
Technical Field
The invention belongs to the field of chemistry, and particularly relates to a corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water.
Background
The brine generally has a low eutectic point, for example, a 30% by weight solution of calcium chloride in water has a eutectic point of about-50 ℃. Often used as a cold transfer medium in industrial enterprises, commonly known as chilled brine. The frozen brine has been used in industrial processes for nearly a hundred years in large quantities because of its low price, nonflammable properties, low eutectic point (freezing point), and the like.
However, the calcium chloride aqueous solution has high corrosivity to steel, for example, the uniform corrosion rate to Q235B carbon steel is generally 0.10mm/a, and a general carbon steel pipeline is corroded and leaked after being used for 2-3 years; the stainless steel has pitting corrosion to stainless steel materials, and the common stainless steel with the type number of 304, 316L and the like generates large-area perforation when used in calcium chloride aqueous solution for 1 to 2 years.
In the past, when calcium chloride and sodium chloride aqueous solutions were used as frozen brine, dichromate was used as a corrosion inhibitor. Adding a certain amount of potassium dichromate or sodium dichromate into each ton of calcium chloride and sodium chloride aqueous solution, and adjusting the pH value of the solution to be about 8 to obtain the brine corrosion inhibition rate of about 90 percent to the carbon steel.
In the chinese patent of invention "corrosion inhibitor for inhibiting brine corrosion of carbon steel and method for preparing and using the same" granted publication No. CN103508570B, general problems with the use of dichromate type corrosion inhibitors have been pointed out: 1) potassium dichromate belongs to a cationic oxidation type corrosion inhibitor, and if the adding amount is insufficient, the coverage rate of a passivation film is insufficient, a higher polarization potential is formed between a non-covered part, and corrosion is accelerated. When an enterprise uses a calcium chloride solution, the amount of calcium chloride required to be supplemented is about 50% -100% of the amount of calcium chloride required to be preserved every year, so that the potassium dichromate is easily lowered to the critical concentration due to insufficient supplementation, and the corrosion is accelerated; 2) the potassium dichromate belongs to heavy metal salts strictly limited in national standards, is extremely harmful to the environment, and chromium elements discharged or lost into the environment can enter a food chain along with intermediate environments of plants, animals and the like and are finally absorbed by human beings. Potassium dichromate has strong carcinogenicity to humans. The national standard GB 8978-1996 determines that chromium and hexavalent chromium are pollutants of a first class, the total chromium of the highest emission concentration is not more than 1.5mg/L, and the hexavalent chromium is not more than 0.5 mg/L; the discharge standard GB21904-2008 for chemical synthesis pharmaceutical industry water pollutants stipulates that the content of hexavalent chromium in sewage discharge of the existing enterprises is less than 0.5mg/L, and the discharge of newly-built enterprises is less than 0.3 mg/L;
in the Chinese patent of invention No. CN103508570B, "corrosion inhibitor for inhibiting corrosion of brine of carbon steel and preparation and use method thereof", there are also mentioned formula of sodium nitrite, sodium hexametaphosphate, zinc dihydrogen phosphate, sodium hydroxide, etc. besides formula of potassium dichromate corrosion inhibitor, the corrosion inhibitor has low corrosion inhibition rate, generally about 80%, and is not suitable for long-term industrial use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a corrosion inhibitor composition for inhibiting the corrosion of carbon steel in halide salt water.
The purpose of the invention is realized by the following technical scheme: a corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water comprises 30-80 wt% of base material and 20-70 wt% of auxiliary material. The base material is a mixture composed of one or more of chloride and bromide according to any proportion. The auxiliary material is composed of two or more than two substances, and is a mixture at least comprising 0.1-20 wt% of the auxiliary material and one or more than two of alkali or alkaline oxide according to any proportion, and 0.1-5 wt% of the auxiliary material, 0.1-30 wt% of ketoxime substance, 0.1-40 wt% of gluconic acid and salt substance thereof, 0.1-30 wt% of ascorbic acid and salt substance thereof, 0.1-10 wt% of citric acid and salt substance thereof, and 0.1-10 wt% of amino acid and salt substance thereof according to any proportion.
Further, the corrosion inhibitor composition is a solid.
Further, the chloride in the base material is a mixture composed of one or more of calcium chloride, magnesium chloride, sodium chloride, lithium chloride, potassium chloride and crystal hydrates thereof according to any proportion; calcium chloride is preferred. The bromide in the base material is one or a mixture of more of calcium bromide, magnesium bromide, sodium bromide, lithium bromide, potassium bromide and crystal hydrates thereof according to any proportion, and is preferably lithium bromide.
Furthermore, the benzo-heterocycle substances in the auxiliary materials are one or a mixture of more than two of benzotriazole, methylbenzotriazole, mercaptobenzotriazole, carboxyl benzotriazole, benzothiophene, methylbenzothiophene and mercaptobenzothiophene according to any proportion; benzotriazole is preferred.
Furthermore, the ketoxime substance in the auxiliary material is a mixture of one or more of dimethyl ketoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, acetophenone ketoxime and dimethylglyoxime in any proportion; dimethyl ketoxime is preferred.
Further, the gluconic acid and salt substances thereof in the auxiliary materials are gluconic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of the gluconic acid, and a mixture of one or more of crystal hydrates of the gluconic acid and the calcium salt, the magnesium salt, the sodium salt, the lithium salt and the potassium salt of the gluconic acid in any proportion; preferably calcium gluconate. The ascorbic acid and salt substances thereof in the auxiliary materials are ascorbic acid, isoascorbic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of ascorbic acid or isoascorbic acid, and a mixture of one or more of crystal hydrates thereof according to any proportion; calcium ascorbate is preferred. The citric acid and salt substances thereof in the auxiliary materials are citric acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of the citric acid, and one or more of crystal hydrates of the citric acid and the calcium salt, the magnesium salt, the sodium salt, the lithium salt and the potassium salt of the citric acid; preferably calcium citrate. The amino acid and salt substances thereof in the auxiliary materials are one or a mixture of more of glycine, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of glycine and crystal hydrate of glycine in any proportion; preferably calcium glycinate.
Further, the alkali or alkaline oxide in the auxiliary materials is a mixture composed of one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, magnesium hydroxide, calcium oxide and magnesium oxide according to any proportion; calcium oxide is preferred.
The application of the corrosion inhibitor composition for inhibiting the corrosion of the carbon steel in the halide salt water is characterized in that the corrosion inhibitor composition is added into the halide salt water and is used for inhibiting the corrosion of the halide salt water to the carbon steel; the corrosion inhibitor composition accounts for 0.5-15 wt% of the halide salt water. The halide brine is a mixture formed by one or more of calcium chloride aqueous solution, magnesium chloride aqueous solution, sodium chloride aqueous solution, lithium chloride aqueous solution, potassium chloride aqueous solution, calcium bromide aqueous solution, magnesium bromide aqueous solution, sodium bromide aqueous solution, lithium bromide aqueous solution and potassium bromide aqueous solution according to any proportion.
The corrosion inhibitor composition is prepared into an aqueous solution with the concentration of 20-80 wt%, and the aqueous solution is directly used as halide brine for inhibiting the corrosion of the carbon steel.
The invention has the beneficial effects that: the invention relates to a novel high-efficiency, environment-friendly and solid corrosion inhibitor composition which is used for replacing a dichromate formula with strong carcinogenicity, a nitrite formula with high toxicity, a non-environment-friendly formula with high phosphorus and zinc contents and a liquid formula which is inconvenient to store and easy to freeze. The invention solves the problem of corrosion of carbon steel materials when brine (especially calcium chloride solution, sodium chloride solution, magnesium chloride solution and lithium bromide solution) is used.
Detailed Description
The invention relates to a corrosion inhibitor composition for inhibiting carbon steel from corroding in halide brine (particularly calcium chloride brine, magnesium chloride brine, sodium chloride brine, lithium chloride brine, potassium chloride brine, calcium bromide brine, magnesium bromide brine, sodium bromide brine, lithium bromide brine and potassium bromide brine), which specifically comprises the following components in percentage by weight: the corrosion inhibitor composition consists of a base material and auxiliary materials. In the corrosion inhibitor composition, 30-80% by mass is taken as a base material, and 20-70% by mass is taken as an auxiliary material. Adding the uniformly mixed corrosion inhibitor composition into brine to be used as a carbon steel corrosion inhibitor; preferably, the base material accounts for 60-75% of the mass of the corrosion inhibitor composition, and the auxiliary material accounts for 25-40% of the mass of the corrosion inhibitor composition.
The base material is one of chloride and bromide or a mixture thereof. The chloride is one or a mixture of more of calcium chloride, magnesium chloride, sodium chloride, lithium chloride, potassium chloride and crystal hydrates thereof according to any proportion; preferably, the chloride is calcium chloride or a crystalline hydrate of calcium chloride. The bromide is one or a mixture of more of calcium bromide, magnesium bromide, sodium bromide, lithium bromide, potassium bromide and crystal hydrates thereof according to any proportion; preferably, the bromide is lithium bromide or a crystalline hydrate of lithium bromide.
The auxiliary material is composed of two or more than two substances, which at least comprises one of alkali or alkaline oxide or a mixture of the alkali or the alkaline oxide and one or more of benzo-heterocycle substances, ketoxime substances, gluconic acid and salt substances thereof, ascorbic acid and salt substances thereof, citric acid and salt substances thereof and amino acid and salt substances thereof through uniform mixing.
One of the auxiliary materials is benzo heterocyclic substances accounting for 0.1 to 5.0 percent of the total weight of the auxiliary materials. The benzo-heterocycle substance is one or a mixture of more than two of benzotriazole, methyl benzotriazole, mercapto benzotriazole, carboxyl benzotriazole, benzothiophene, methyl benzothiophene and mercapto benzothiophene according to any proportion; preferably, the auxiliary material comprises benzotriazole accounting for 0.5-2.0% of the total mass of the composition.
One of the auxiliary materials is ketoxime substance accounting for 0.1-30.0 percent of the total weight of the auxiliary materials. The ketoxime substance is one or a mixture of more than two of dimethyl ketoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, acetophenone ketoxime and dimethylglyoxime in any proportion; preferably, the auxiliary material comprises dimethyl ketoxime accounting for 2.0-10.0% of the total mass of the auxiliary material.
One of the auxiliary materials is gluconic acid and salt substances thereof which account for 0.1 to 40.0 percent of the total weight of the auxiliary materials. The gluconic acid and gluconate substances are gluconic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of the gluconic acid, and one or a mixture of more than two of crystal hydrates of the gluconic acid and the calcium salt, the magnesium salt, the sodium salt, the lithium salt and the potassium salt of the gluconic acid; preferably, the auxiliary material comprises calcium gluconate accounting for 5.0-30.0% of the total mass of the auxiliary material.
One of the auxiliary materials is ascorbic acid and salt substances thereof which account for 0.1 to 30.0 percent of the total weight of the auxiliary materials. The ascorbic acid and salt substances thereof are ascorbic acid, isoascorbic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of ascorbic acid or isoascorbic acid, and one or a mixture of more than two of crystal hydrates thereof according to any proportion; preferably, the auxiliary material comprises calcium ascorbate accounting for 5.0-25.0% of the total mass of the auxiliary material.
One of the auxiliary materials is citric acid and salt substances thereof accounting for 0.1 to 10.0 percent of the total weight of the auxiliary materials. The citric acid and salt substances thereof are citric acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of the citric acid, and one or a mixture of more than two of crystal hydrates of the citric acid and the calcium salt, the magnesium salt, the sodium salt, the lithium salt and the potassium salt of the citric acid; preferably, the auxiliary material comprises calcium citrate which accounts for 0.5-5.0% of the total mass of the auxiliary material.
One of the auxiliary materials is amino acid and salt substances thereof accounting for 0.1 to 10.0 percent of the total weight of the auxiliary materials. The amino acid and salt substances thereof are glycine, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of glycine, and one or a mixture of more than two of crystal hydrates thereof according to any proportion; preferably, the adjuvant comprises 0.5% -8.0% of calcium glycinate.
One of the auxiliary materials is alkali or alkaline oxide accounting for 0.1 to 20.0 percent of the total weight of the auxiliary materials. The alkali or alkaline oxide is one or a mixture of more than two of sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, magnesium hydroxide, calcium oxide and magnesium oxide according to any proportion; preferably, the auxiliary material comprises calcium oxide accounting for 3.0-10.0% of the total mass of the auxiliary material.
The use method of the invention comprises the following steps: adding 0.5-15.0% of the corrosion inhibitor composition into calcium chloride aqueous solution, magnesium chloride aqueous solution, sodium chloride aqueous solution, lithium chloride aqueous solution, potassium chloride aqueous solution, calcium bromide aqueous solution, magnesium bromide aqueous solution, sodium bromide aqueous solution, lithium bromide aqueous solution or potassium bromide aqueous solution according to the mass percentage for use as a corrosion inhibitor; preferably, 1.0 wt% to 10.0 wt% of the above corrosion inhibitor composition is added to the halide brine.
The other using method of the invention is as follows: the corrosion inhibitor composition is directly used as a solute of brine and dissolved in water to prepare brine with corrosion inhibition performance on carbon steel; preferably, the concentration of the corrosion inhibitor composition in the prepared aqueous solution is 40.0-60.0%.
According to the general principle of metal and alloy corrosion experiments GB/T19291-plus 2006, the performance of the corrosion inhibitor is evaluated, and the experiment result shows that when the experiment temperature is normal temperature (25 ℃), the experiment time is 168 hours, and 0.5-15 wt% of the corrosion inhibitor composition is added, the corrosion inhibition rate is higher than 90.0%, and is consistent with the corrosion inhibition rate of a bichromate formula.
The present invention will be further described with reference to the following examples.
Comparative example 1: preparing a calcium chloride solution with the mass concentration of 30%, and performing a corrosion experiment on Q235B carbon steel at normal temperature (25 ℃) according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, wherein the corrosion rate is 0.0813 mm/a.
Comparative example 2: preparing a lithium bromide solution with the mass concentration of 55%, and performing a corrosion experiment on Q235B carbon steel at normal temperature (25 ℃) according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, wherein the corrosion rate is measured to be 0.1425 mm/a.
Example 3: the corrosion inhibitor composition comprises the following components in percentage by mass: 75.0 percent of calcium chloride is taken as a base material, 1.0 percent of benzotriazole (accounting for 4.0 percent of the auxiliary material), 5.0 percent of calcium gluconate (accounting for 20.0 percent of the auxiliary material), 6.0 percent of dimethylketoxime (accounting for 24.0 percent of the auxiliary material), 7.0 percent of calcium ascorbate (accounting for 28.0 percent of the auxiliary material), 1.0 percent of calcium citrate (accounting for 4.0 percent of the auxiliary material), 1.0 percent of calcium glycinate (accounting for 4.0 percent of the auxiliary material) and 4.0 percent of calcium oxide (accounting for 16.0 percent of the auxiliary material) are mixed to form the auxiliary material. 0.5 wt% of the corrosion inhibitor composition of example 3 was added to the calcium chloride solution of comparative example 1, and the corrosion rate was 0.0079mm/a and the corrosion inhibition rate was 90.3% according to the general principles of corrosion experiments on metals and alloys GB/T19291-one 2006.
Example 4: 15.0 wt% of the corrosion inhibitor composition of example 3 was added to the calcium chloride solution of comparative example 1, and the corrosion rate was 0.0052mm/a and the corrosion inhibition rate was 93.6%, as determined according to general principles of corrosion experiments on metals and alloys GB/T19291-one 2006.
Example 5: the corrosion inhibitor composition comprises the following components in percentage by mass: 60.0 percent of calcium chloride is taken as a base material, 1.5 percent of benzotriazole (accounting for 3.8 percent of the auxiliary material), 11.5 percent of calcium gluconate (accounting for 28.8 percent of the auxiliary material), 7.0 percent of dimethylketoxime (accounting for 17.5 percent of the auxiliary material), 10.0 percent of calcium ascorbate (accounting for 25.0 percent of the auxiliary material), 1.5 percent of citric acid (accounting for 3.8 percent of the auxiliary material), 1.0 percent of glycine (accounting for 2.5 percent of the auxiliary material) and 7.5 percent of calcium oxide (accounting for 18.8 percent of the auxiliary material) are mixed to form the auxiliary material. To the calcium chloride solution of comparative example 1, 1.0 wt% of the corrosion inhibitor composition of example 5 was added, and according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, the corrosion rate was 0.0051mm/a and the corrosion inhibition rate was 93.7%.
Example 6: 10.0 wt% of the corrosion inhibitor composition of example 5 was added to the calcium chloride solution of comparative example 1, and the corrosion rate was 0.0044mm/a and the corrosion inhibition rate was 94.6% according to the general principles of corrosion experiments on metals and alloys GB/T19291-2006.
Example 7: the corrosion inhibitor composition comprises the following components in percentage by mass: 60.0 percent of calcium chloride, 20.0 percent of lithium chloride are taken as base materials, 0.8 percent of methylbenzotriazole (accounting for 4.0 percent of the auxiliary materials), 5.0 percent of calcium gluconate (accounting for 25.0 percent of the auxiliary materials), 5.0 percent of dimethylketoxime (accounting for 25.0 percent of the auxiliary materials), 5.0 percent of calcium ascorbate (accounting for 25.0 percent of the auxiliary materials), 0.6 percent of calcium citrate (accounting for 3.0 percent of the auxiliary materials), 0.6 percent of calcium glycinate (accounting for 3.0 percent of the auxiliary materials) and 3.0 percent of calcium oxide (accounting for 15.0 percent of the auxiliary materials) are mixed to form the auxiliary materials. To the calcium chloride solution of comparative example 1, 1.0 wt% of the corrosion inhibitor composition of example 7 was added, and according to general principles of corrosion experiments on metals and alloys GB/T19291-one 2006, the corrosion rate was 0.0078mm/a and the corrosion inhibition rate was 90.4%.
Example 8: 10.0 wt% of the corrosion inhibitor composition of example 7 was added to the lithium bromide solution of comparative example 2, and the corrosion rate was 0.0125mm/a and the corrosion inhibition rate was 91.2%, as determined according to the general principles of corrosion experiments on metals and alloys GB/T19291-one 2006.
Example 9: the corrosion inhibitor composition comprises the following components in percentage by mass: 70.0 percent of lithium bromide is taken as a base material, 1.0 percent of benzotriazole (accounting for 3.3 percent of the auxiliary material), 5.0 percent of lithium gluconate (accounting for 16.7 percent of the auxiliary material), 7.0 percent of dimethylketoxime (accounting for 23.3 percent of the auxiliary material), 8.0 percent of lithium erythorbate (accounting for 26.7 percent of the auxiliary material), 2.0 percent of lithium citrate (accounting for 6.7 percent of the auxiliary material), 2.0 percent of glycine (accounting for 6.7 percent of the auxiliary material) and 5.0 percent of lithium hydroxide (accounting for 16.7 percent of the auxiliary material) are mixed to form the auxiliary material. 5.0 wt% of the corrosion inhibitor composition of example 9 was added to the lithium bromide solution of comparative example 2, and the corrosion rate was 0.0083mm/a and the corrosion inhibition rate was 94.2%, as determined according to general principles of corrosion experiments on metals and alloys GB/T19291-one 2006.
Example 10: 70.0 wt% of the corrosion inhibitor composition in the embodiment 9 is added into water, and stirred uniformly to prepare a solution, according to the general principle of corrosion experiments on metals and alloys GB/T19291-one 2006, the corrosion rate is 0.0074mm/a, and the corrosion inhibition rate is 94.8% after comparison with the comparative example 2.
Example 11: the corrosion inhibitor composition comprises the following components in percentage by mass: 78.0 percent of calcium chloride is taken as a base material, 0.5 percent of methylbenzotriazole (accounting for 2.3 percent of the auxiliary material), 5.0 percent of calcium gluconate (accounting for 22.7 percent of the auxiliary material), 2.0 percent of dimethylketoxime (accounting for 9.1 percent of the auxiliary material), 6.5 percent of calcium ascorbate (accounting for 29.5 percent of the auxiliary material), 2.0 percent of calcium citrate (accounting for 9.1 percent of the auxiliary material), 2.0 percent of calcium glycinate (accounting for 9.1 percent of the auxiliary material) and 4.0 percent of calcium oxide (accounting for 18.2 percent of the auxiliary material) are mixed to form the auxiliary material. The corrosion inhibitor composition in example 11 is prepared into 30.0 wt% aqueous solution with water, and according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, the corrosion rate is 0.0038mm/a, and the corrosion inhibition rate is 95.3% compared with that of comparative example 1.
Example 12: to the calcium chloride solution of comparative example 1, 8.0 wt% of the corrosion inhibitor composition of example 11 was added, and according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, the corrosion rate was 0.0046mm/a and the corrosion inhibition rate was 94.8%.
Example 13: the corrosion inhibitor composition comprises the following components in percentage by mass: 70.0 percent of lithium bromide is taken as a base material, 1.0 percent of benzotriazole (accounting for 3.3 percent of the auxiliary material), 12.0 percent of lithium gluconate (accounting for 40.0 percent of the auxiliary material), 2.0 percent of dimethylketoxime (accounting for 6.7 percent of the auxiliary material), 5.0 percent of ascorbic acid (accounting for 16.7 percent of the auxiliary material), 3.0 percent of lithium citrate (accounting for 10.0 percent of the auxiliary material), 2.0 percent of glycine (accounting for 6.7 percent of the auxiliary material) and 5.0 percent of lithium hydroxide (accounting for 16.7 percent of the auxiliary material) are mixed to form the auxiliary material. The corrosion inhibitor composition in example 13 is prepared into an 80.0 wt% aqueous solution with water, and according to general principles of corrosion experiments on metals and alloys GB/T19291-one 2006, the corrosion rate is 0.0091mm/a, and the corrosion inhibition rate is 93.6% after comparison with comparative example 2.
Example 14: 5.0 wt% of the corrosion inhibitor composition of example 13 was added to the lithium bromide solution of comparative example 2, and the corrosion rate was 0.0105mm/a and the corrosion inhibition rate was 92.6% according to general principles of corrosion experiments on metals and alloys GB/T19291-one 2006.
Example 15: the corrosion inhibitor composition comprises the following components in percentage by mass: 30.0 percent of calcium chloride is taken as a base material, 2.0 percent of benzotriazole (accounting for 2.9 percent of the auxiliary material), 28.0 percent of calcium gluconate (accounting for 40.0 percent of the auxiliary material), 3.0 percent of dimethylketoxime (accounting for 4.3 percent of the auxiliary material), 20.0 percent of calcium ascorbate (accounting for 28.6 percent of the auxiliary material), 6.0 percent of calcium citrate (accounting for 8.6 percent of the auxiliary material), 5.0 percent of calcium glycinate (accounting for 7.1 percent of the auxiliary material) and 6.0 percent of calcium oxide (accounting for 8.6 percent of the auxiliary material) are mixed to form the auxiliary material. The corrosion inhibitor composition in example 15 is prepared into 70.0 wt% aqueous solution with water, and according to general principle of corrosion test for metals and alloys GB/T19291-2006, the corrosion rate is 0.0036mm/a, and the corrosion inhibition rate is 95.6% after comparing with comparative example 2.
Example 16: to the calcium chloride solution of comparative example 1, 0.6 wt% of the corrosion inhibitor composition of example 13 was added, and according to general principles of corrosion experiments on metals and alloys GB/T19291-2006, the corrosion rate was 0.0042mm/a and the corrosion inhibition rate was 94.8%.
Claims (9)
1. The corrosion inhibitor composition for inhibiting the corrosion of carbon steel in halide salt water is characterized by comprising 30-80 wt% of base material and 20-70 wt% of auxiliary material. The base material is a mixture composed of one or more of chloride and bromide according to any proportion. The auxiliary material is composed of two or more than two substances, and is a mixture at least comprising 0.1-20 wt% of the auxiliary material and one or more than two of alkali or alkaline oxide according to any proportion, and 0.1-5 wt% of the auxiliary material, 0.1-30 wt% of ketoxime substance, 0.1-40 wt% of gluconic acid and salt substance thereof, 0.1-30 wt% of ascorbic acid and salt substance thereof, 0.1-10 wt% of citric acid and salt substance thereof, and 0.1-10 wt% of amino acid and salt substance thereof according to any proportion.
2. The corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water as claimed in claim 1 wherein said corrosion inhibitor composition is a solid.
3. A corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water as claimed in claim 1, wherein the chloride in the base stock is a mixture of one or more of calcium chloride, magnesium chloride, sodium chloride, lithium chloride, potassium chloride and their crystalline hydrates in any proportion; calcium chloride is preferred. The bromide in the base material is one or a mixture of more of calcium bromide, magnesium bromide, sodium bromide, lithium bromide, potassium bromide and crystal hydrates thereof according to any proportion, and is preferably lithium bromide.
4. The corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water according to claim 1, wherein the benzo-heterocycle substance in the auxiliary material is one or a mixture of more than two of benzotriazole, methylbenzotriazole, mercaptobenzotriazole, carboxyl benzotriazole, benzothiophene, methylbenzothiophene and mercaptobenzothiophene according to any proportion; benzotriazole is preferred.
5. A corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water as claimed in claim 1, wherein the ketoxime substance in the auxiliary material is a mixture of one or more of dimethyl ketoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, acetophenone ketoxime and dimethylglyoxime in any proportion; dimethyl ketoxime is preferred.
6. The corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide salt water as claimed in claim 1, wherein gluconic acid and salt substances thereof in the auxiliary material are one or a mixture of more of gluconic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of gluconic acid, and crystalline hydrate of gluconic acid; preferably calcium gluconate. The ascorbic acid and salt substances thereof in the auxiliary materials are ascorbic acid, isoascorbic acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of ascorbic acid or isoascorbic acid, and a mixture of one or more of crystal hydrates thereof according to any proportion; calcium ascorbate is preferred. The citric acid and salt substances thereof in the auxiliary materials are citric acid, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of the citric acid, and one or more of crystal hydrates of the citric acid and the calcium salt, the magnesium salt, the sodium salt, the lithium salt and the potassium salt of the citric acid; preferably calcium citrate. The amino acid and salt substances thereof in the auxiliary materials are one or a mixture of more of glycine, calcium salt, magnesium salt, sodium salt, lithium salt and potassium salt of glycine and crystal hydrate of glycine in any proportion; preferably calcium glycinate.
7. The corrosion inhibitor composition for inhibiting corrosion of carbon steel in halide brine according to claim 1, wherein the alkali or alkaline oxide in the auxiliary material is a mixture of one or more of sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, magnesium hydroxide, calcium oxide and magnesium oxide in any proportion; calcium oxide is preferred.
8. Use of a corrosion inhibitor composition for inhibiting corrosion of carbon steel in a halide salt water according to claim 1, wherein the corrosion inhibitor composition is added to the halide salt water for inhibiting corrosion of the carbon steel by the halide salt water; the corrosion inhibitor composition accounts for 0.5-15 wt% of the halide salt water. The halide brine is a mixture formed by one or more of calcium chloride aqueous solution, magnesium chloride aqueous solution, sodium chloride aqueous solution, lithium chloride aqueous solution, potassium chloride aqueous solution, calcium bromide aqueous solution, magnesium bromide aqueous solution, sodium bromide aqueous solution, lithium bromide aqueous solution and potassium bromide aqueous solution according to any proportion.
9. Use of a corrosion inhibitor composition according to claim 1 for inhibiting corrosion of carbon steel in a halide salt water, wherein the corrosion inhibitor composition is formulated as an aqueous solution having a concentration of 20 to 80 wt% and is used directly as the halide salt water for inhibiting corrosion of carbon steel.
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Application publication date: 20211228 |