CN117263565B - Multifunctional corrosion-resistant rust inhibitor for concrete and preparation method and application thereof - Google Patents
Multifunctional corrosion-resistant rust inhibitor for concrete and preparation method and application thereof Download PDFInfo
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- CN117263565B CN117263565B CN202311288796.0A CN202311288796A CN117263565B CN 117263565 B CN117263565 B CN 117263565B CN 202311288796 A CN202311288796 A CN 202311288796A CN 117263565 B CN117263565 B CN 117263565B
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- rust inhibitor
- sodium
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- 238000005260 corrosion Methods 0.000 title claims abstract description 133
- 230000007797 corrosion Effects 0.000 title claims abstract description 126
- 239000004567 concrete Substances 0.000 title claims abstract description 90
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003112 inhibitor Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 106
- -1 polypropylene Polymers 0.000 claims abstract description 62
- 239000004743 Polypropylene Substances 0.000 claims abstract description 58
- 229920001155 polypropylene Polymers 0.000 claims abstract description 58
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 53
- 230000005764 inhibitory process Effects 0.000 claims abstract description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 238000000280 densification Methods 0.000 claims abstract description 27
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 21
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 18
- 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 claims abstract description 17
- 229940050410 gluconate Drugs 0.000 claims abstract description 17
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 13
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 12
- GIPRGFRQMWSHAK-UHFFFAOYSA-M sodium;2-propan-2-ylbenzenesulfonate Chemical compound [Na+].CC(C)C1=CC=CC=C1S([O-])(=O)=O GIPRGFRQMWSHAK-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 8
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000003755 preservative agent Substances 0.000 claims description 30
- 230000002335 preservative effect Effects 0.000 claims description 30
- 239000008367 deionised water Substances 0.000 claims description 23
- 229910021641 deionized water Inorganic materials 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 23
- 239000006185 dispersion Substances 0.000 claims description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 17
- 230000000813 microbial effect Effects 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 7
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 150000002500 ions Chemical class 0.000 abstract description 10
- 230000002706 hydrostatic effect Effects 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 21
- 239000000243 solution Substances 0.000 description 20
- 239000004568 cement Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 description 10
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 10
- 238000006703 hydration reaction Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 9
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 9
- JUAHWAGHDQJOLT-UHFFFAOYSA-M sodium;propane-2-sulfonate Chemical compound [Na+].CC(C)S([O-])(=O)=O JUAHWAGHDQJOLT-UHFFFAOYSA-M 0.000 description 9
- 230000036571 hydration Effects 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 7
- 239000000176 sodium gluconate Substances 0.000 description 7
- 235000012207 sodium gluconate Nutrition 0.000 description 7
- 229940005574 sodium gluconate Drugs 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 6
- 230000000979 retarding effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910021485 fumed silica Inorganic materials 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 235000010288 sodium nitrite Nutrition 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910000077 silane Inorganic materials 0.000 description 3
- 229940079842 sodium cumenesulfonate Drugs 0.000 description 3
- QEKATQBVVAZOAY-UHFFFAOYSA-M sodium;4-propan-2-ylbenzenesulfonate Chemical compound [Na+].CC(C)C1=CC=C(S([O-])(=O)=O)C=C1 QEKATQBVVAZOAY-UHFFFAOYSA-M 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical group CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004574 high-performance concrete Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- JBVOQKNLGSOPNZ-UHFFFAOYSA-N 2-propan-2-ylbenzenesulfonic acid Chemical compound CC(C)C1=CC=CC=C1S(O)(=O)=O JBVOQKNLGSOPNZ-UHFFFAOYSA-N 0.000 description 1
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229920000858 Cyclodextrin Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012490 blank solution Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229940071118 cumenesulfonate Drugs 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a multifunctional corrosion-resistant rust inhibitor for concrete, and a preparation method and application thereof, and belongs to the technical field of chemical additives for building materials. The multifunctional corrosion and rust inhibitor for concrete comprises, by weight, 3.5-11 parts of corrosion inhibition components, 1-3 parts of waterproof components and 1-6 parts of densification components; wherein the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate, the waterproof component comprises one or more of sodium methyl silicate, sodium silicate and sodium metasilicate pentahydrate, and the densification component comprises nano silicon dioxide and/or organosilicon-nano calcium carbonate composite modified polypropylene. The multifunctional corrosion-resistant rust inhibitor for concrete prepared by the invention can effectively resist the influence of chloride ions on the corrosion of concrete steel bars in a high-concentration harmful ion environment, even in a hydrostatic pressure environment in which the corrosion of harmful ions is accelerated, and can improve the sulfate ion tolerance of the concrete.
Description
Technical Field
The invention belongs to the technical field of building material chemical additives, and particularly relates to a multifunctional corrosion-resistant rust inhibitor for concrete, and a preparation method and application thereof.
Background
The reinforced concrete engineering in the infrastructure is in a large proportion, and the significance of protecting the reinforced concrete engineering from damage is particularly important. The main factor affecting the durability of concrete is the corrosion of the steel bars in the concrete structure, and the prevention and control of the corrosion of the steel bars are key to ensuring the service safety and durability of the structure. Particularly under the environmental conditions of ocean, salt lake and the like, chloride ions permeate into the surface of the steel bar through concrete pores, and the concentration reaches about 0.4 percent, so that the stability of a passivation film can be destroyed, and the corrosion of the steel bar is accelerated. In addition to chloride ion attack, sulfate attack is also an environmental water attack that is the most complex and damaging of the destructive factors of concrete structures. Soil, groundwater, seawater, rotten organic matters and industrial wastewater all contain sulfate ions, and the sulfate ions penetrate into the concrete to react with cement hydration products, so that phenomena such as expansion, cracking, flaking and the like are generated, and the strength and the viscosity of the concrete are lost. Studies have shown that the penetration depth and content of chloride ions increases with increasing duration of hydrostatic pressure. In addition, for the corrosion of concrete in different areas of the ocean, the sulfate ion concentration of the surface layer of the exposed concrete in 3 corrosion areas is almost equivalent, and the concentration of the sulfate ion of the inner layer is ordered as follows: tidal zone > submarine zone > atmospheric zone, indicating that the impact pressure and hydrostatic pressure of seawater will accelerate the penetration of harmful ions into the concrete.
In summary, it is necessary to develop a novel multifunctional corrosion-resistant rust inhibitor for concrete, which resists corrosion of chloride ions and sulfate ions and has excellent impermeability.
Disclosure of Invention
In order to solve the technical problems, the invention provides a multifunctional corrosion-resistant rust inhibitor for concrete, and a preparation method and application thereof.
One of the technical schemes of the invention is as follows:
a multifunctional corrosion-resistant rust inhibitor for concrete uses gluconate, nitrite and sodium isopropylsulfonate as corrosion inhibition components, and effectively resists corrosion of chloride ions to steel bars in two directions of anode corrosion inhibition and water drainage; sodium methyl silicate and/or sodium metasilicate pentahydrate are used as waterproof components, so that the penetration of harmful ion solution is reduced from the waterproof angle; the nano silicon dioxide and/or the organosilicon-nano calcium carbonate composite modified polypropylene are used as densification components, wherein the nano silicon dioxide is reactive densification, and the organosilicon-nano calcium carbonate composite modified polypropylene is a part of reactive densification components, so that the impermeability, the erosion resistance and the dry-wet heat cycle resistance of the concrete are improved. Specifically, the multifunctional corrosion and rust inhibitor for concrete comprises, by weight, 3.5-11 parts of corrosion inhibition components, 1-3 parts of waterproof components and 1-6 parts of densification components;
the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate;
the waterproof component comprises one or more of sodium methyl silicate, sodium silicate and sodium metasilicate pentahydrate;
the densifying component comprises nano silicon dioxide and/or organosilicon-nano calcium carbonate composite modified polypropylene.
Further, the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate with the mass ratio of (0.5-2) to (2-8) to (1-3).
Still further, the nitrite includes sodium nitrite and/or calcium nitrite.
Further, the nano silicon dioxide is gas phase silicon dioxide (disperse phase) with the particle size of 5-70nm and/or neutral silica sol (disperse phase) with the particle size of 3-150 nm.
Further, the preparation method of the organosilicon-nano calcium carbonate composite modified polypropylene comprises the following steps:
preparing nano calcium carbonate dispersion liquid containing sodium polyacrylate; soaking polypropylene fibers in a silane coupling agent solution at 50-60 ℃ for 3-5 hours, taking out the soaked polypropylene fibers, washing and drying; and adding the dried polypropylene fibers into the nano calcium carbonate dispersion liquid, heating to 80-90 ℃, stirring for 2 hours, filtering, washing and drying to obtain the organosilicon-nano calcium carbonate composite modified polypropylene.
Further, the preparation method of the silane coupling agent solution comprises the following steps: 10 parts of deionized water, 90 parts of 90wt% ethanol solution and 68 parts of silane coupling agent are weighed according to parts by weight, mixed and dispersed for 10-30min by ultrasonic.
Further, the preparation method of the nano calcium carbonate dispersion solution comprises the following steps: 98 parts of deionized water, 0.3 part of sodium polyacrylate and 1.7 parts of nano calcium carbonate are weighed according to parts by weight and stirred for 1h at 60-80 ℃.
Further, the particle size of the nano calcium carbonate is 10-80nm.
Still further, the silane coupling agent is gamma-aminopropyl triethoxysilane (KH 550).
Further, the multifunctional concrete corrosion-resistant rust inhibitor also comprises 0.1-0.3 part of microbial preservative.
Still further, the microbial preservative is an isothiazolinone preservative.
The second technical scheme of the invention is as follows:
the preparation method of the multifunctional concrete corrosion-resistant rust inhibitor comprises the following steps:
and weighing the raw materials according to parts by weight, adding the corrosion inhibition component, the waterproof component and the densification component into deionized water, stirring and dispersing, and then adding the microbial preservative to obtain the multifunctional corrosion and rust inhibitor for concrete.
Further, the mass ratio of the deionized water to the waterproof component is (80-95) to (1-3).
Further, the stirring speed is 200-2500r/min, and the stirring time is 10-30min.
The third technical scheme of the invention:
the multifunctional corrosion-resistant rust inhibitor for concrete is applied to buildings resistant to corrosion of chloride ions and sulfate ions.
The multifunctional corrosion-resistant rust inhibitor for concrete prepared by the invention can effectively resist chloride ions and sulfate ions, and the anti-rust capability of the concrete reinforcing steel bar is improved directly related to the functions exerted by the raw materials together:
the gluconate in the corrosion inhibition component has multifunction, namely, the gluconate has the effect of resisting chloride ions to rust the steel bar, and the gluconate can be complexed with metal ions dissolved on the surface of the steel bar to generate a thin oxide film so as to isolate metal from a corrosive medium; secondly, the dispersibility can effectively promote the dispersion of cement particles and nano silicon dioxide particles.
The nitrite in the corrosion inhibition component is one or two of sodium nitrite and calcium nitrite, the nitrite belongs to an anodic corrosion inhibition metal passivating agent, a protective oxidant film can be formed on the anode part of corroded metal, corrosion of the metal is resisted, and the nitrite has strong adsorption effect on the surface of the metal; in addition, the cement retarder has a certain retarding compensation effect, two components with retarding effect are gluconate and sodium methyl silicate respectively, wherein the sodium methyl silicate is used as a waterproof component, but the special siloxane structure of the sodium methyl silicate enables the sodium methyl silicate to be adsorbed on the surfaces of cement particles to provide a certain steric hindrance effect among the cement particles so as to prevent cement hydration, prolong hydration induction period and delay main hydration peak, so that the cement retarder has a certain retarding property. When the mixing amount of the two components reaches the function of effectively resisting harmful ion erosion, the retarding function is also achieved, the hydration rate of cement can be accelerated by adding nitrite, the plasticization of the cement is reduced, and the later strength of the cement is not influenced.
Sodium cumene sulfonate in the corrosion inhibition component has a plurality of key functional effects in the multifunctional corrosion prevention and rust resistance agent of concrete, namely, the corrosion inhibition mechanism of the sodium cumene sulfonate mainly has two effects of anodic corrosion inhibition and hydrophobic corrosion inhibition, sodium cumene sulfonate can be ionized into cumene sulfonate in a corrosion medium, wherein the sulfonate end is negatively charged, has hydrophilicity and is easy to be adsorbed on the surface of positively charged metal; the isopropyl phenyl end has hydrophobicity, can isolate the corrosion medium from the metal surface, generates electric adsorption with sulfonate towards the metal surface and isopropyl phenyl towards the corrosion medium, and forms a molecular upright and compact single-molecule adsorption layer along with the increase of the concentration of sodium isopropyl benzene sulfonate, and the hydrophobic protective film effectively prevents corrosion; secondly, the air entraining effect, namely the sodium isopropylbenzene sulfonate is a low-foam surfactant, and a small amount of micro-size bubbles can be introduced into the concrete, so that the state of the concrete is improved, and meanwhile, the inner aperture is optimized, and the erosion effect of harmful ions on the concrete can be achieved; and thirdly, solubilization, and optimizing the dispersion performance of each component in the system to improve the stability of the corrosion-resistant rust inhibitor system and the dispersion effect of each component in the concrete.
The waterproof component comprises one or more of methyl sodium silicate, sodium silicate and sodium metasilicate pentahydrate, and after the multifunctional corrosion-resistant rust inhibitor for concrete is doped into the concrete, the internal pores of the concrete can be reduced, capillary channels can be blocked, and the water permeability of the concrete under the action of hydrostatic pressure can be reduced.
The nano silicon dioxide in the densifying component has higher volcanic ash reactivity, can consume more Calcium Hydroxide (CH), reduce the CH content in a mixed system after hydration, increase the content of C-S-H gel, reduce the calcium-silicon ratio of the C-S-H gel, and reduce the calcium-silicon ratio, so that the sulfate erosion resistance of the cement-based material can be improved, and the expansion of the cement-based material under sulfate erosion can be reduced.
The organosilicon-nano calcium carbonate composite modified polypropylene in the densifying component adopts polypropylene fiber in the preparation process, and the polypropylene fiber is a novel environment-friendly high-performance material which is used as a part of an anti-corrosion rust inhibitor in a concrete material, so that the bending resistance, impact performance, toughness and corrosion resistance can be improved. In addition, due to bridging effect of the fibers, crack expansion resistance of the concrete can be effectively improved. The uniform dispersion of polypropylene fibers in a concrete material is critical to the mechanical properties of the concrete, when the polypropylene fibers are uniformly dispersed in a concrete system, cracks can be effectively prevented, the concrete is reinforced and toughened, the interface property between the fibers and the concrete is improved, if the fibers are unevenly dispersed in a cement-based material, the properties of the fiber-reinforced cement-based composite material are affected, stress concentration points are formed, and finally the polypropylene fibers become weak points and breakthrough points of invasion of corrosive media, so that the structural safety is endangered, the service life of the structure is shortened, and the polypropylene fibers are modified by using a silane coupling agent and nano calcium carbonate. Therefore, the sulfate corrosion resistance of the concrete is improved by uniformly dispersing the treated polypropylene fibers in the cement mortar. The calcium carbonate molecules used in the preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene can absorb water molecules, after hydrolysis, a plurality of hydroxyl groups appear on the surface of the calcium carbonate, the moisture absorption performance of the fiber can be improved, and after the silane coupling agent-nano calcium carbonate composite modification, a plurality of hydroxyl groups on the surface of the nano calcium carbonate react with sodium polyacrylate to generate hydrophilic carboxyl groups (COO-). Therefore, when in contact with water, the fibers exhibit good hydrophilicity, so that the polypropylene fibers grafted with silane and coated with nano calcium carbonate can be uniformly dispersed in water.
Compared with the prior art, the invention has the following advantages and technical effects:
(1) The multifunctional corrosion-resistant rust inhibitor for concrete prepared by the invention can effectively resist the influence of chloride ions on the corrosion of concrete steel bars in a high-concentration harmful ion environment, even in a hydrostatic pressure environment in which the corrosion of harmful ions is accelerated, and can improve the sulfate ion tolerance of the concrete.
(2) The method for preparing the multifunctional corrosion-resistant rust inhibitor for concrete is simple and is suitable for large-scale popularization and production.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The embodiment of the invention provides a multifunctional corrosion and rust inhibitor for concrete, which comprises, by weight, 3.5-11 parts of corrosion inhibition components, 1-3 parts of waterproof components and 1-6 parts of densification components;
the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate;
the waterproof component comprises one or more of sodium methyl silicate, sodium silicate and sodium metasilicate pentahydrate;
the densifying component comprises nano silicon dioxide and/or organosilicon-nano calcium carbonate composite modified polypropylene.
In a preferred embodiment of the invention, the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate with the mass ratio of (0.5-2) to (2-8) to (1-3), wherein the nitrite comprises sodium nitrite and/or calcium nitrite, and the gluconate, the nitrite and the sodium isopropylbenzene sulfonate are used as the corrosion inhibition component to effectively resist corrosion of chlorine ions to steel bars from the anode in a corrosion inhibition and hydrophobic two-way direction. The three corrosion inhibition components have other properties while having corrosion inhibition performance. The gluconate has retarding property, if the proportion is lower than the lower limit, the effective corrosion inhibition effect is not achieved, and if the proportion is higher than the upper limit, the coagulation time is greatly influenced, so that the super retarding and even non-coagulation are caused; nitrite has early strength, if the nitrite is lower than the lower limit, the nitrite can cause bleeding segregation of concrete on the basis of existence of gluconate, in addition, the setting time is greatly prolonged, if the nitrite is higher than the upper limit, the nitrite can be accelerated, so that the working performance of the concrete is reduced, the later strength of the concrete is negatively influenced, and in addition, the excessive sodium content can cause alkali aggregate poisoning; if the content of sodium isopropylsulfonate is higher than the upper limit, the concrete contains too much air, and the volume weight and the strength of the concrete are difficult to reach the design standard. Therefore, the mass ratio is the optimal ratio of the three components, and the ratio finds a balance point according to other properties of the three components while ensuring corrosion inhibition performance, and the balance point inhibits each other in terms of concrete state and setting time, thereby playing a synergistic effect in terms of resisting harmful ion erosion.
In a preferred embodiment of the present invention, the nano-silica is fumed silica (dispersed phase) having a particle size of 5 to 70nm and/or neutral silica sol (dispersed phase) having a particle size of 3 to 150 nm. Nano SiO with the particle diameter 2 The modified cement-based material has stronger surface activity, and can promote the hydration reaction of cement to generate C-S-H gel for reinforcing the transition interface of the matrix when being doped into the concrete matrix, thereby reducing the porosity of the cement-based material, increasing the compactness of the concrete in two mechanisms of chemistry and physics and improving the mechanical property of the concrete to a certain extent. And SiO 2 The surface inertia is enhanced when the particle size is too large, and the composite material can be only used as a physical filling component in concrete, and no macroscopic function is basically reflected under the condition of low doping amount.
In the embodiment of the invention, the preparation method of the organosilicon-nano calcium carbonate composite modified polypropylene comprises the following steps:
preparing a silane coupling agent solution: 10 parts of deionized water, 90 parts of 90wt% ethanol solution and 68 parts of silane coupling agent are weighed according to parts by weight, mixed and dispersed for 10-30min by ultrasonic.
Preparing a nano calcium carbonate dispersion solution: weighing 98 parts of deionized water, 0.3 part of sodium polyacrylate and 1.7 parts of nano calcium carbonate according to parts by weight, and stirring for 1h at 60-80 ℃;
soaking polypropylene fibers in a silane coupling agent solution at 50-60 ℃ for 3-5 hours, taking out the soaked polypropylene fibers, washing and drying; and adding the dried polypropylene fibers into the nano calcium carbonate dispersion liquid, heating to 80-90 ℃ and stirring for 2 hours, taking out the polypropylene fibers, washing and drying to obtain the organosilicon-nano calcium carbonate composite modified polypropylene. After the silane coupling agent-nano calcium carbonate is compounded and modified, the polypropylene fiber can be uniformly dispersed in the cement-based material to improve the sulfate corrosion resistance of the concrete, and the dispersibility of the polypropylene fiber can be reduced by changing part of parameters in the preparation process or reducing modification steps.
In a preferred embodiment of the present invention, the nano calcium carbonate has a particle size of 10-80nm. Since 10-80nm of calcium carbonate has a nano-sized particle size, the number of surface atoms, surface area, surface energy and the like thereof are rapidly increased, and at the particle size, the nano-sized calcium carbonate can improve the compactness of concrete by providing nucleation sites, increasing contact points and the like.
In a preferred embodiment of the present invention, the silane coupling agent is gamma-aminopropyl triethoxysilane (KH 550).
In a preferred embodiment of the invention, the multifunctional corrosion-resistant rust inhibitor for concrete further comprises 0.1-0.3 part of a microbial preservative, in particular an isothiazolinone preservative. The biological preservative can promote the decomposition of microorganism metabolites and inhibit the growth of microorganisms so as to prevent the corrosion of microorganisms in the concrete, thereby achieving the purpose of protecting the concrete, and the biological preservative can improve the performance of the concrete to ensure that the biological preservative has better anti-corrosion performance, thereby prolonging the service life of the concrete. The embodiment of the invention also provides a preparation method of the multifunctional concrete corrosion-resistant rust inhibitor, which comprises the following steps:
weighing the raw materials according to parts by weight, adding the corrosion inhibition component, the waterproof component and the densification component into deionized water, stirring and dispersing uniformly, if not dispersing uniformly, adding a silane coupling agent modified polycarboxylic acid high-performance water reducer (Shijia Chang An Jiu building materials Co., ltd.), dispersing uniformly by using 360W power ultrasonic, then adding the microbial preservative to obtain the multifunctional corrosion and rust inhibitor for concrete,
in the preferred embodiment of the invention, the mass ratio of the deionized water to the waterproof component is (80-95) to (1-3).
In the preferred embodiment of the invention, the stirring speed is 200-2500r/min and the stirring time is 10-30min.
The raw materials used in the embodiment of the invention are all commercially available.
In the embodiment of the invention, the parts are parts by weight unless otherwise specified.
The technical scheme of the invention is further described by the following examples.
Example 1
Weighing 10 parts of deionized water, 90 parts of 90wt% ethanol solution and 68 parts of silane coupling agent (KH 550) in parts by weight in a beaker, and performing ultrasonic dispersion for 30min to prepare a silane coupling agent solution;
taking 98 parts of deionized water, 0.3 part of sodium polyacrylate and 1.7 parts of nano calcium carbonate (with the particle size of 40 nm) in a flask, heating to 70 ℃, and stirring for 1h to obtain a nano calcium carbonate dispersion solution;
adding 20 parts of dry and clean polypropylene fibers into 100 parts of the silane coupling agent solution, soaking for 5 hours at 50 ℃, filtering out the polypropylene fibers, washing with deionized water, filtering, and drying for later use;
adding 10 parts of polypropylene fibers treated in the previous step into 100 parts of nano calcium carbonate dispersion solution, heating to 80 ℃ and stirring for 2 hours, cooling to 30 ℃, filtering out the polypropylene fibers, washing with absolute ethyl alcohol, and drying to obtain the organosilicon-nano calcium carbonate composite modified polypropylene;
7.5 parts of corrosion inhibition components (1 part of sodium gluconate, 5.5 parts of calcium nitrite and 1 part of sodium isopropylsulfonate), 1.5 parts of waterproof components (sodium methyl silicate) and 3 parts of densification components (organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 88 parts of deionized water, stirred for 10 minutes at 500r/min, and 0.2 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 2
The preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene is the same as that of the example 1;
6 parts of corrosion inhibition components (1 part of sodium gluconate, 4 parts of calcium nitrite and 1 part of sodium isopropylsulfonate), 1 part of waterproof components (sodium methyl silicate) and 4 parts of densification components (2 parts of fumed silica with the particle size of 40nm and 2 parts of organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 87 parts of deionized water, stirring is carried out for 10 minutes at 2000r/min, and 0.2 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 3
The preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene is the same as that of the example 1;
6 parts of corrosion inhibition components (0.5 part of sodium gluconate, 3.5 parts of calcium nitrite and 2 parts of sodium isopropylsulfonate), 1 part of waterproof components (sodium metasilicate pentahydrate) and 4 parts of densification components (1 part of fumed silica with the particle size of 40nm and 3 parts of organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 89 parts of deionized water, stirring is carried out for 30min at 2500r/min, and 0.1 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 4
The preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene is the same as that of the example 1;
6 parts of corrosion inhibition components (1 part of sodium gluconate, 4 parts of calcium nitrite and 1 part of sodium isopropylsulfonate), 1 part of waterproof components (sodium methyl silicate) and 4 parts of densification components (3 parts of fumed silica with the particle size of 40nm and 1 part of organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 89 parts of deionized water, stirring is carried out for 30min at 2500r/min, then 1.5 parts of silane coupling agent modified polycarboxylic acid high-performance water reducer (Shijia Chang An Jiu building materials Co., ltd.) are added, 360W power ultrasonic dispersion is used, and 0.1 part of microbial preservative (isothiazolinone preservative) is added after the dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 5
9 parts of corrosion inhibition components (1 part of sodium gluconate, 6 parts of calcium nitrite and 2 parts of sodium isopropylbenzene sulfonate), 3 parts of waterproof components (sodium methyl silicate) and 1 part of densification components (fumed silica with the particle size of 40 nm) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 87 parts of deionized water, stirring is carried out for 10 minutes at 1000r/min, and 0.2 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 6
The preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene is the same as that of the example 1;
3.5 parts of corrosion inhibition components (0.5 part of gluconate, 2 parts of sodium nitrite and 1 part of sodium isopropylsulfonate), 3 parts of waterproof components (sodium silicate) and 6 parts of densification components (organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 95 parts of deionized water, stirred for 30min at 2500r/min, and 0.3 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Example 7
The preparation process of the organosilicon-nano calcium carbonate composite modified polypropylene is the same as that of the example 1;
11 parts of corrosion inhibition components (2 parts of gluconate, 8 parts of sodium nitrite and 3 parts of sodium isopropylsulfonate), 1 part of waterproof components (sodium silicate) and 1 part of densification components (organosilicon-nano calcium carbonate composite modified polypropylene) are weighed according to parts by weight, the corrosion inhibition components, the waterproof components and the densification components are added into 80 parts of deionized water, stirring is carried out for 30min at 2500r/min, and 0.1 part of microbial preservative (isothiazolinone preservative) is added after dispersion, so that the multifunctional corrosion and rust inhibitor for concrete is obtained.
Comparative example 1
According to the parts by weight, 0.5 part of sodium gluconate and 3.5 parts of calcium nitrite are taken and dissolved in 96 parts of deionized water, dispersed for 5min at the rotating speed of 500r/min, and finally 0.1 part of microbial preservative (isothiazolinone preservative) is added, so that the anti-corrosion rust inhibitor is obtained.
Comparative example 2
A high-performance concrete preservative enhancer purchased by a company. The specific process comprises the following steps: 50g of copper oxide with the particle size of 500nm is acidified in a hydrochloric acid system with the particle size of 0.01mol/L, 3g of octanoic acid is added after the acidification treatment, and atomization mixing treatment is carried out at the temperature of 100 ℃ to obtain the modified nano silicon dioxide. Adding 40g of water, 20g of triisopropanolamine and 0.05g of cyclodextrin into a reaction kettle, uniformly stirring, adding modified nano silicon dioxide into the aqueous solution, controlling the pH in the solution to be 5-9, rapidly stirring, and continuing stirring until the system is stable after the nano silicon dioxide is added, thereby obtaining the high-performance concrete anti-corrosion reinforcing agent.
Comparative example 3
The same as in example 1 was except that 1 part of a corrosion inhibiting component (sodium gluconate), 1.5 parts of a water-proofing component (sodium methyl silicate) and 3 parts of a densifying component (organosilicon-nano calcium carbonate composite modified polypropylene) were weighed in parts by weight.
Comparative example 4
The only difference from example 1 is that the addition of the water-repellent component (sodium methyl silicate) was omitted.
Comparative example 5
The same as in example 1 is only different in that the preparation of the organosilicon-nano calcium carbonate composite modified polypropylene is omitted, and the equal mass of the densification component is replaced by polypropylene fiber.
Performance testing
Mortar was prepared with 4% of the amount of the adhesive material for the samples prepared in the examples and comparative examples, and the performances of the mortar were tested, respectively, the test method was referred to "building mortar basic performance test method Standard JGJ/T70-2009", JC/T1011-2021 concrete anti-erosion preservative "as the test standard, and the specific performance test results are shown in Table 1.
Table 1 results of testing mortar properties for examples and comparative examples
As can be seen from table 1, the corrosion resistance and rust resistance agent prepared in the example of the present invention has a lower expansion coefficient, a significantly higher corrosion resistance coefficient, compressive strength and impermeability pressure than those of the comparative example, because the comparative example 1 changes the kinds of raw materials, only part of corrosion inhibition components are retained, sodium isopropyl sulfonate capable of improving the pore diameter structure and all waterproof and densification components are omitted, so that the mortar can effectively resist chloride ion corrosion but the sulfate corrosion resistance is greatly reduced; comparative example 2 is because only the active densifying component is present, and no corrosion inhibition and water-proof component is present, although sulfate attack can be effectively resisted to a certain extent, it is difficult to prevent the invasion of chloride ions with smaller ionic radius into the solution of chloride salt for a long time to corrode the reinforcing steel bar without the protective film; comparative example 3 is difficult to perform an effective corrosion inhibition function at the blending amount because only one corrosion inhibition component is reserved and the parts are low, and the steel bar is rusted, and bleeding segregation is easy to occur in the aspect of mortar state because no nitrite is inhibited; comparative example 4 omits the waterproof component based on example 1, reduces the anti-permeability performance of the concrete to a certain extent, and therefore, the anti-corrosion performance is weakened to a certain extent, and the strength is inferior to that of example 1, so that the sodium methyl silicate can also improve the later strength of the concrete to a certain extent; from comparative example 5, the mortar strength and corrosion resistance of the unmodified polypropylene fiber are slightly lower than those of the modified polypropylene fiber, because the modified polypropylene fiber has active hydrophilic groups on the surface which can be in biochemical action with water in mortar, the fiber cement mortar can obtain better hydration environment in the hydration process, the compactness is increased, the strength is developed, the modified polypropylene fiber can be uniformly dispersed in the mortar, the surface is rough, and the bonding property with a cement matrix is better, so that the modified polypropylene fiber cement mortar has higher compression strength. Therefore, the corrosion-resistant rust inhibitor prepared by the invention can improve the corrosion resistance of concrete.
Test bar with 10mm diameter and 50mm length for steel bar sample Q235 steel car and with surface roughness reaching R.6.3, surrounding being encapsulated by epoxy resin, leaving 1cm 2 The working area is then soaked in acetone for 15min, and the mixture is dried to be used as a working electrode, a platinum electrode counter electrode and a saturated calomel electrode as a reference electrode. Preparation of saturated Ca (OH) containing 1.15% NaCl 2 The solutions were divided into 8 groups, and the corrosion inhibitor and rust inhibitor of examples and comparative examples were added to each group of the solutions at a ratio of 2.2% by weight, respectively, and the other group was not treated (blank group). The polarization resistance of working electrodes in the blank solution and the solution containing different corrosion-resistant rust inhibitors is respectively marked as R, R' along with the time change, the measurement time is respectively 1h, 2h, 3h, 6h, 1d, 3d, 5d and 7d, the higher the polarization resistance Rp is, the stronger the corrosion resistance is, and the measurement time is according to the following conditions(wherein R' and R are the self-corrosion current densities of the metals in the solution without and with the corrosion inhibitor, respectively), the corrosion inhibition efficiency (. Eta.) of the corrosion inhibitor after soaking for 7 days was calculated, and the results are shown in Table 2.
Table 2 results of the saline immersion test
The anti-corrosion rust inhibitor prepared by the embodiment of the invention can ensure that the concrete has good anti-chloride ion corrosion performance, anti-sulfate corrosion performance and anti-permeability performance, has excellent three-day strength, has no negative influence on later strength, is suitable for environments with different corrosion ion concentrations, and can be used in different hydraulic environments such as hydrostatic pressure or tidal zone according to the difference of chloride ion concentration and sulfate concentration.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. The multifunctional corrosion and rust inhibitor for concrete is characterized by comprising, by weight, 3.5-11 parts of corrosion inhibition components, 1-3 parts of waterproof components and 1-6 parts of densification components;
the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate;
the waterproof component comprises one or more of sodium methyl silicate, sodium silicate and sodium metasilicate pentahydrate;
the densifying component comprises nano silicon dioxide and/or organosilicon-nano calcium carbonate composite modified polypropylene;
the corrosion inhibition component comprises gluconate, nitrite and sodium isopropylbenzene sulfonate with the mass ratio of (0.5-2) to (2-8) to (1-3);
the preparation method of the organosilicon-nano calcium carbonate composite modified polypropylene comprises the following steps:
preparing nano calcium carbonate dispersion liquid containing sodium polyacrylate; soaking polypropylene fibers in a silane coupling agent solution at 50-60 ℃ for 3-5 hours, taking out the soaked polypropylene fibers, washing and drying; and adding the dried polypropylene fibers into the nano calcium carbonate dispersion liquid, heating to 80-90 ℃, stirring for 2 hours, filtering, washing and drying to obtain the organosilicon-nano calcium carbonate composite modified polypropylene.
2. The multifunctional corrosion-resistant rust inhibitor for concrete according to claim 1, wherein the preparation method of the silane coupling agent solution is as follows: 10 parts of deionized water, 90 parts of 90wt% ethanol solution and 68 parts of silane coupling agent are weighed according to parts by weight, mixed and dispersed for 10-30min by ultrasonic.
3. The multifunctional corrosion-resistant rust inhibitor for concrete according to claim 1, wherein the preparation method of the nano calcium carbonate dispersion solution is as follows: 98 parts of deionized water, 0.3 part of sodium polyacrylate and 1.7 parts of nano calcium carbonate are weighed according to parts by weight and stirred for 1h at 60-80 ℃.
4. The multifunctional corrosion and rust inhibitor for concrete according to claim 1, further comprising 0.1-0.3 parts of a microbial preservative.
5. A method for preparing the multifunctional corrosion-resistant rust inhibitor for concrete according to any one of claims 1 to 4, comprising the following steps:
and weighing the raw materials according to parts by weight, adding the corrosion inhibition component, the waterproof component and the densification component into deionized water, stirring and dispersing, and then adding the microbial preservative to obtain the multifunctional corrosion and rust inhibitor for concrete.
6. The method for preparing the multifunctional corrosion-resistant rust inhibitor for concrete according to claim 5, wherein the mass ratio of the deionized water to the waterproof component is (80-95) to (1-3).
7. The method for preparing the multifunctional corrosion-resistant rust inhibitor for concrete according to claim 5, wherein the stirring speed is 200-2500r/min and the stirring time is 10-30min.
8. Use of the multifunctional corrosion-resistant rust inhibitor for concrete according to any one of claims 1 to 4 for the corrosion-resistant construction of chloride ions and sulfate ions.
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| CN104478286A (en) * | 2014-11-12 | 2015-04-01 | 湖南省建筑工程集团总公司 | Compound concrete anti-corrosion and rust-resistant agent |
| CN110183136A (en) * | 2019-06-04 | 2019-08-30 | 福建省建筑科学研究院有限责任公司 | A kind of concrete corrosion-prevention rust-resistance agent and preparation method thereof |
| CN112811844A (en) * | 2021-01-19 | 2021-05-18 | 浙江大学 | Nano composite migration type steel bar corrosion inhibitor suitable for concrete in marine environment |
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2023
- 2023-10-08 CN CN202311288796.0A patent/CN117263565B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478286A (en) * | 2014-11-12 | 2015-04-01 | 湖南省建筑工程集团总公司 | Compound concrete anti-corrosion and rust-resistant agent |
| CN110183136A (en) * | 2019-06-04 | 2019-08-30 | 福建省建筑科学研究院有限责任公司 | A kind of concrete corrosion-prevention rust-resistance agent and preparation method thereof |
| CN112811844A (en) * | 2021-01-19 | 2021-05-18 | 浙江大学 | Nano composite migration type steel bar corrosion inhibitor suitable for concrete in marine environment |
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