CN114806517A - Automobile anti-freezing cooling liquid and preparation method thereof - Google Patents
Automobile anti-freezing cooling liquid and preparation method thereof Download PDFInfo
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- CN114806517A CN114806517A CN202210491850.0A CN202210491850A CN114806517A CN 114806517 A CN114806517 A CN 114806517A CN 202210491850 A CN202210491850 A CN 202210491850A CN 114806517 A CN114806517 A CN 114806517A
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- 239000000110 cooling liquid Substances 0.000 title claims abstract description 37
- 238000007710 freezing Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000005260 corrosion Methods 0.000 claims abstract description 67
- -1 triazole silane compound Chemical class 0.000 claims abstract description 66
- 230000007797 corrosion Effects 0.000 claims abstract description 65
- 239000002826 coolant Substances 0.000 claims abstract description 38
- 239000003112 inhibitor Substances 0.000 claims abstract description 36
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims abstract description 34
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 26
- 229920000767 polyaniline Polymers 0.000 claims abstract description 26
- 229910000077 silane Inorganic materials 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920002197 Sodium polyaspartate Polymers 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 claims abstract description 14
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 claims abstract description 12
- 229930182470 glycoside Natural products 0.000 claims abstract description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 9
- 239000003086 colorant Substances 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 229920000570 polyether Polymers 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 55
- 238000001816 cooling Methods 0.000 claims description 45
- 230000002528 anti-freeze Effects 0.000 claims description 36
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 32
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 30
- 238000002156 mixing Methods 0.000 claims description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 10
- 229920001451 polypropylene glycol Polymers 0.000 claims description 10
- CASYTJWXPQRCFF-UHFFFAOYSA-N 2-chloroethyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCl CASYTJWXPQRCFF-UHFFFAOYSA-N 0.000 claims description 8
- MCPLVIGCWWTHFH-UHFFFAOYSA-L methyl blue Chemical compound [Na+].[Na+].C1=CC(S(=O)(=O)[O-])=CC=C1NC1=CC=C(C(=C2C=CC(C=C2)=[NH+]C=2C=CC(=CC=2)S([O-])(=O)=O)C=2C=CC(NC=3C=CC(=CC=3)S([O-])(=O)=O)=CC=2)C=C1 MCPLVIGCWWTHFH-UHFFFAOYSA-L 0.000 claims description 7
- GYBMSOFSBPZKCX-UHFFFAOYSA-N sodium;ethanol;ethanolate Chemical compound [Na+].CCO.CC[O-] GYBMSOFSBPZKCX-UHFFFAOYSA-N 0.000 claims description 7
- 125000001376 1,2,4-triazolyl group Chemical group N1N=C(N=C1)* 0.000 claims description 6
- 125000005370 alkoxysilyl group Chemical group 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 6
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- KLSJWNVTNUYHDU-UHFFFAOYSA-N Amitrole Chemical compound NC1=NC=NN1 KLSJWNVTNUYHDU-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- PZKFSRWSQOQYNR-UHFFFAOYSA-N 5-methyl-1h-1,2,4-triazole Chemical compound CC1=NC=NN1 PZKFSRWSQOQYNR-UHFFFAOYSA-N 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 claims description 2
- 229940012189 methyl orange Drugs 0.000 claims description 2
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000009835 boiling Methods 0.000 abstract description 9
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 7
- 239000005060 rubber Substances 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 6
- 239000003566 sealing material Substances 0.000 abstract description 5
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 4
- 239000010962 carbon steel Substances 0.000 abstract description 4
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 3
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 22
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 8
- 230000008014 freezing Effects 0.000 description 7
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 5
- 238000005536 corrosion prevention Methods 0.000 description 5
- 229930182478 glucoside Natural products 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910001092 metal group alloy Inorganic materials 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002455 scale inhibitor Substances 0.000 description 3
- 150000004760 silicates Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002826 nitrites Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000003851 azoles Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
-
- 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
- C23F11/10—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 using organic inhibitors
- C23F11/173—Macromolecular compounds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses an automobile anti-freezing cooling liquid and a preparation method thereof, and relates to the technical field of refrigerating liquids. The invention discloses an automobile anti-freezing cooling liquid which is prepared from the following raw materials in percentage by weight: 70-80% of propylene glycol, 10-15% of PEG-200, 3.5-4.3% of a composite corrosion inhibitor, 0.5-0.8% of sodium polyaspartate, 0-0.05% of a coloring agent, 0.1-0.2% of a polyether defoaming agent and the balance of deionized water; the composite corrosion inhibitor consists of water-soluble polyaniline, a triazole silane compound, capric acid, suberic acid and alkyl glycoside; the invention also provides a preparation method of the automobile anti-freezing cooling liquid. The automobile antifreezing coolant provided by the invention is environment-friendly, has a simple preparation method, has excellent corrosion resistance on materials such as carbon steel, aluminum alloy, magnesium alloy, copper alloy, rubber or plastic sealing materials, also has excellent boiling prevention, antifreezing and antiscaling performances, can be stably stored for a long time, and has a long service life.
Description
Technical Field
The invention belongs to the technical field of cooling liquid, and particularly relates to an automobile anti-freezing cooling liquid and a preparation method thereof.
Background
The automobile engine is a power core part of an automobile, a large amount of heat is generated in the process of energy conversion, so that the purpose of cooling by circulation of a cooling system is achieved, the cooling liquid is used for assisting the heat dissipation of the engine, and the cooling liquid is easy to solidify at low temperature in winter, so that the cooling system of the automobile is frost-cracked, the existing cooling liquid is required to have a lower freezing point, and therefore the anti-freezing cooling liquid becomes a conventional index of the existing automobile engine cooling system.
The traditional antifreezing coolant is prepared by mixing ethylene glycol and water according to a certain proportion, and the automobile cooling system is made of various materials, mainly carbon steel, aluminum alloy, magnesium alloy, copper alloy, rubber or plastic sealing materials and the like. Foreign enterprises, however, consider: the traditional antifreezing cooling liquid is difficult to meet higher cooling requirements, and the traditional antifreezing cooling liquid is easy to be boiled at 100 ℃; when the temperature of the engine reaches above 90 ℃, steam and water bubbles begin to be generated on the cylinder wall, and the heat conduction capability (cooling capability) of water is reduced; the water is easy to generate galvanic corrosion and generate scale, steam, cavitation and the like under the action of electrolyte, so that the corrosion is generated on a cooling system, and the service life of an automobile engine is influenced. At present, domestic and foreign enterprises are dedicated to developing anhydrous antifreezing cooling liquid, although the anhydrous antifreezing cooling liquid can be directly used theoretically, the cost of the anhydrous antifreezing cooling liquid is higher in practice, and few domestic and foreign enterprises are provided with the anhydrous cooling liquid, so that when the anhydrous antifreezing cooling liquid is replaced in the later maintenance process, the residual moisture in the original hydrous antifreezing liquid influences the quality of the anhydrous antifreezing cooling; and the existing anhydrous antifreezing coolant is less, the problem of aluminum discoloration and blackening cannot be solved, the storage stability is poor, after a period of recycling, the viscosity of the anhydrous antifreezing coolant becomes thick, the effects of cooling, rust prevention and the like become poor, the service life is short, and the cost is high.
At present, the antifreeze cooling liquid also faces a problem of corrosion to the cooling system material in the cooling system, and a common method for solving the problem is to add a corrosion inhibitor into the antifreeze cooling liquid. The corrosion inhibitors commonly used in the prior art are classified into inorganic type corrosion inhibitors and organic type corrosion inhibitors. Wherein, the inorganic corrosion inhibitor mainly comprises: phosphates, chromates, molybdates, borates, nitrites and silicates have good corrosion inhibition effect on metals or alloys such as carbon steel, aluminum, copper or zinc, but have certain toxicity and large water pollution and are limited to use; the molybdate has better corrosion prevention effect on metal or alloy, but is expensive and high in cost; silicate compounds almost have good corrosion inhibition effect on every metal and alloy, but the silicate compounds have poor stability after being stored and used for a certain time, easily form gel substances to be separated out, reduce the corrosion resistance, and generate gel which is easy to block pipelines. The organic corrosion inhibitor mainly comprises: amine, organic acid and azole compounds, but the existing organic corrosion inhibitors have poor corrosion prevention effect on aluminum or aluminum alloy, and the organic substances are contacted with aluminum metal to cause aluminum to discolor and blacken, so that the cooling and corrosion prevention effects of cooling liquid are influenced, and the service life of a cooling system is further influenced.
Disclosure of Invention
The invention aims to provide the automobile anti-freezing cooling liquid which is environment-friendly, simple in preparation method, excellent in corrosion resistance to carbon steel, aluminum alloy, magnesium alloy, copper alloy, rubber or plastic sealing materials and the like, excellent in boiling prevention, freezing prevention and scale prevention performances, long in service life and capable of being stably stored for a long time.
In order to realize the aim of the invention, the invention provides an automobile antifreeze coolant which comprises the following raw materials in percentage by weight: 70-80% of propylene glycol, 10-15% of PEG-200, 3.5-4.3% of a composite corrosion inhibitor, 0.5-0.8% of sodium polyaspartate, 0-0.05% of a coloring agent, 0.1-0.2% of a polyether defoaming agent and the balance of deionized water.
The propylene glycol is used as the base liquid of the anti-freezing cooling liquid, the melting point is-59 ℃, the boiling point is 186-188 ℃, the anti-freezing and anti-boiling effects are excellent, the volatilization is difficult, and the quality of the cooling liquid is ensured. The PEG-200 and the propylene glycol are mixed for use according to a certain proportion, so that the heat stability of the antifreeze cooling liquid can be further improved, the freezing point is low, and the chemical stability of the antifreeze cooling liquid is ensured.
The sodium polyaspartate is a corrosion and scale inhibitor, has excellent dispersibility when added into the corrosion and scale inhibitor, can form chelates on the surfaces of various metals such as calcium, magnesium, copper, iron and the like or alloys, is attached to the surface of a metal container to prevent metal corrosion, can also act synergistically with a composite corrosion inhibitor to protect a cooling system to a greater extent, achieves the anticorrosion effect, can inhibit scale and inhibit the generation of solid impurities in the corrosion and scale inhibitor.
Furthermore, the composite corrosion inhibitor is composed of water-soluble polyaniline, a triazole silane compound, decanoic acid, suberic acid and alkyl glycoside.
The addition of the water-soluble polyaniline can obviously improve the anticorrosion effect on metals such as cast iron, copper, aluminum, magnesium, steel and the like, and a shared electron pair contained in a central nitrogen atom can form a d-vacant orbit with the surface of the protected metal to form a coordination bond, so that the polyaniline can form a protective film on the surface of the metal to play a role in anticorrosion; the polyaniline can also react with metal to form compact metal oxide under the condition of containing water, thereby playing the role of corrosion prevention.
The addition of the decanoic acid and the suberic acid has a good effect on corrosion inhibition of the aluminum alloy, the two acids belong to weak acids and have certain pH buffering capacity, when metal is corroded, the pH value is reduced, a slightly acidic environment is locally presented, and the decanoic acid or the suberic acid is reasonably adsorbed at an active point where corrosion occurs from a solution to prevent further corrosion; when corrosion of corrosion points is inhibited and the local pH value is recovered to a normal state, the capric acid or the suberic acid is changed into ions again and is dissolved into the solution, the two acids are adsorbed by activity without film formation, so that the consumption is slow, the better corrosion inhibition effect is ensured, and the service life of the corrosion inhibitor is prolonged.
The addition of alkyl glycoside can reduce the corrosion of antifreezing coolant to rubber and plastic parts and prolong the service life of cooling system.
Further, the antifreezing cooling liquid is prepared from the following raw materials in percentage by weight: 60-75% of propylene glycol, 10-15% of PEG-200, 0.5-1% of water-soluble polyaniline, 1-1.5% of triazole silane compound, 0.5-0.8% of capric acid, 0.3-0.6% of suberic acid, 0.7-0.9% of alkyl glycoside, 0.5-0.8% of sodium polyaspartate, 0.02-0.05% of colorant, 0.1-0.2% of polyether defoamer and the balance of deionized water.
Further, the triazole silane compound is a compound having both an alkoxysilyl group and a 1,2, 4-triazole ring in the molecule.
Further, the preparation method of the triazole silane compound comprises the following steps: adding a triazole compound into ethanol, uniformly stirring, then adding a 30 wt% sodium ethoxide ethanol solution, stirring for 40min, then adding 2-chloroethyltrimethoxysilane, heating to 60-70 ℃, stirring for 3-4 h, cooling to normal temperature, filtering, and distilling the filtrate under reduced pressure to obtain the final product.
Further, the ratio of the triazole compound to the ethanol is 2 mol/L; the molar mass ratio of the triazole compound to 2-chloroethyltrimethoxysilane is 1: 1; the molar mass ratio of the triazole compound to the solute contained in the sodium ethoxide ethanol solution is 1: 1.
further, the triazole compound is any one of 3-methyl-1, 2, 4-triazole and 3-amino-1, 2, 4-triazole.
The triazole silane compound is a compound containing alkoxy silyl and 1,2, 4-triazole ring, is prepared by HCl removal reaction of triazole compound and 2-chloroethyl trimethoxy silane, has good corrosion resistance to metals or metal alloys such as aluminum, copper, iron, zinc, tin and the like, can improve the combination effect between metal and sealing materials (plastics or rubber materials) while preventing the metal from rusting, cannot corrode the rubber or the plastics, and generates adhesive force when the metal is connected with the sealing materials, thereby improving the corrosion resistance of a cooling system. The triazole silane compound is compounded with water-soluble polyaniline, capric acid and suberic acid, so that the components are matched with each other, and the components generate synergy while ensuring that the antirust paint has lower viscosity, lower melting point and higher boiling point, so that the antirust paint has better corrosion resistance to various metals or metal alloys, plastics and other materials, solves the problem that the existing aluminum and aluminum alloys are easy to blacken, and also prolongs the service life of the antifreeze coolant.
Further, the colorant is any one of methyl orange, fluorescent green, methyl blue and methyl red.
Further, the polyether defoamer is any one of glycerol polyoxypropylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether or polyoxyethylene polyoxypropylene amine ether.
The invention also provides a preparation method of the automobile anti-freezing cooling liquid, which comprises the following steps:
s1, weighing the antifreezing cooling liquid according to the weight percentage;
s2, mixing 1/2 propylene glycol and the composite corrosion inhibitor, heating to 90-100 ℃, stirring to form a mixed liquid, and naturally cooling to room temperature;
s3, heating the other 1/2 of propylene glycol to 60-75 ℃, adding PEG-200, stirring and mixing uniformly, then adding the sodium polyaspartate and the colorant in sequence, stirring for 5-10 min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S2, and stirring for 5min to obtain a mixture;
s4, adding deionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, adjusting the pH value to 7.5-8.5, adding a polyether defoamer, and uniformly stirring.
The invention achieves the following beneficial effects:
1. the antifreezing cooling liquid does not contain toxic substances such as phosphates, borates, nitrites, chromates and the like, is environment-friendly in raw materials, reduces the pollution to water, does not generate volatile organic compounds in production, construction, application and other links, and reduces the harm to human bodies and the pollution to the environment.
2. The propylene glycol and the polyethylene glycol are selected as base materials of the anti-freezing cooling liquid, have lower freezing point and higher boiling point, have better anti-freezing and cooling effects, can be used at the temperature of more than 60 ℃ below zero, have better anti-corrosion effect, prevent erosion of non-metallic materials such as rubber parts of a cooling system and the like, ensure that the anti-freezing cooling liquid can be stably used for a long time, and prolong the service life of the cooling system.
3. According to the invention, water-soluble polyaniline, triazole silane compound, decanoic acid, suberic acid and alkyl glycoside are used as the composite corrosion inhibitor, so that the corrosion inhibitor has a good corrosion inhibition effect on various metals, metal alloys, plastics and other materials, the corrosion prevention effect of the corrosion inhibitor is improved, and the service life of a cooling system is prolonged; the components have synergistic effect, so that the pH value of the cooling liquid is stable, the service life of the anti-freezing cooling liquid is prolonged, and the cost is reduced.
4. The preparation method provided by the invention is simple, strong in operability, free of complex equipment and low in cost.
5. The antifreezing coolant has low water content and no water, adopts the composite corrosion inhibitor without inorganic salt, has the characteristics of cooling resistance, difficult volatilization, strong corrosion resistance, prevention of scale generation, stable cooling rate, environmental protection and the like, is suitable for cooling systems of various materials, and has wide application range.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of "sub-embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The antifreeze coolant for automobiles and the preparation method thereof according to the present invention will be described with reference to the following embodiments.
Example 1
The preparation method of the automobile antifreeze coolant comprises the following steps:
s1, mixing 3.5kg of propylene glycol and 0.35kg of composite corrosion inhibitor, heating to 95 ℃, stirring to form mixed liquid, and naturally cooling to room temperature;
s2, heating 3.5kg of propylene glycol to 70 ℃, then adding 1.5kg of PEG-200, stirring and mixing uniformly, then adding 80g of sodium polyaspartate and 2g of methyl blue in sequence, stirring for 10min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S1, and stirring for 5min to obtain a mixture;
s3, adding 1.048kg of ionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, stirring, adjusting the pH value to 8.0, adding 200g of glycerol polyoxypropylene ether, and uniformly stirring.
The composite corrosion inhibitor consists of 0.5kg of water-soluble polyaniline, 1.5kg of triazole silane compound, 0.5kg of capric acid, 0.3kg of suberic acid and 0.7kg of alkyl glucoside.
The sodium polyaspartate is produced by Wuhanplofu biotechnology.
The glycerol polyoxypropylene ether mentioned above is selected from the group consisting of the antifoaming agents GP330 of new materials from the family of the UpHminkoku.
The water-soluble polyaniline is provided by Hubei Biotechnology development Co.
The above-mentioned triazolesilane compound has both an alkoxysilyl group and a 1,2, 4-triazole ring in the molecule. The preparation method of the triazole silane compound comprises the following steps: adding 3-methyl-1, 2, 4-triazole 1mol into 0.5L ethanol, stirring uniformly, then adding 226.83g30 wt% sodium ethoxide ethanol solution, stirring for 40min, then adding 2-chloroethyl trimethoxy silane 1mol, heating to 70 ℃, stirring for 3h, cooling to normal temperature, filtering, and distilling the filtrate under reduced pressure to obtain the final product.
The alkyl glycoside (APG) is selected from GREENAPG PC series of Qingkagao New materials of Yangzhou.
Example 2
The preparation method of the automobile antifreeze coolant comprises the following steps:
s1, mixing 4.0kg of propylene glycol and 0.43kg of composite corrosion inhibitor, heating to 100 ℃, stirring to form mixed liquid, and naturally cooling to room temperature;
s2, heating 4.0kg of propylene glycol to 75 ℃, then adding 1.0kg of PEG-200, stirring and mixing uniformly, then adding 50g of sodium polyaspartate and 5g of methyl blue in sequence, stirring for 10min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S1, and stirring for 5min to obtain a mixture;
s3, adding 0.505kg of deionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, stirring, adjusting the pH value to 8.0, adding 100g of polyoxyethylene polyoxypropylene pentaerythritol ether, and uniformly stirring.
The composite corrosion inhibitor consists of 1kg of water-soluble polyaniline, 1kg of triazole silane compound, 0.8kg of capric acid, 0.6kg of suberic acid and 0.9kg of alkyl glucoside.
The sodium polyaspartate is produced by Wuhanplofu biotechnology.
The polyoxyethylene polyoxypropylene pentaerythritol ether is selected from XPJ770 from Jiangsu Saihuo Yue.
The water-soluble polyaniline is provided by Hubei Biotechnology development Co.
The above-mentioned triazolesilane compound has both an alkoxysilyl group and a 1,2, 4-triazole ring in the molecule. The preparation method of the triazole silane compound comprises the following steps: adding 3-amino-1, 2, 4-triazole 1mol into 0.5L ethanol, stirring uniformly, then adding 226.83g30 wt% sodium ethoxide ethanol solution, stirring for 40min, then adding 2-chloroethyl trimethoxysilane 1mol, heating to 60 ℃, stirring for 4h, cooling to normal temperature, filtering, and distilling the filtrate under reduced pressure.
The alkyl glycoside (APG) is selected from GREENAPG PC series of Qingkagao New materials of Yangzhou.
Example 3
The preparation method of the automobile antifreeze coolant comprises the following steps:
s1, mixing 3.6kg of propylene glycol and 0.41kg of composite corrosion inhibitor, heating to 100 ℃, stirring to form mixed liquid, and naturally cooling to room temperature;
s2, heating 3.6kg of propylene glycol to 70 ℃, then adding 1.45kg of PEG-200, stirring and mixing uniformly, then adding 65g of sodium polyaspartate and 5g of methyl blue in sequence, stirring for 10min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S1, and stirring for 10min to obtain a mixture;
s3, adding 0.852kg of ionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, stirring to adjust the pH value to 8.0, adding 180g of glycerol polyoxypropylene ether, and uniformly stirring.
The composite corrosion inhibitor consists of 1kg of water-soluble polyaniline, 1.2kg of triazole silane compound, 0.7kg of capric acid, 0.4kg of suberic acid and 0.8kg of alkyl glucoside.
The sodium polyaspartate is produced by Wuhanplofu biotechnology.
The glycerol polyoxypropylene ether mentioned above is selected from the group consisting of the antifoaming agents GP330 of new materials from the family of the UpHminkoku.
The water-soluble polyaniline is provided by Hubei Biotechnology development Co.
The above-mentioned triazolesilane compound has both an alkoxysilyl group and a 1,2, 4-triazole ring in the molecule. The preparation method of the triazole silane compound comprises the following steps: adding 3-amino-1, 2, 4-triazole 1mol into 0.5L ethanol, stirring uniformly, then adding 226.83g30 wt% sodium ethoxide ethanol solution, stirring for 40min, adding 2-chloroethyl trimethoxysilane 1mol, heating to 70 ℃, stirring for 4h, cooling to normal temperature, filtering, and distilling the filtrate under reduced pressure.
The alkyl glycoside (APG) is selected from GREENAPG PC series of Qingkagao New materials of Yangzhou.
Example 4
The preparation method of the automobile antifreeze coolant comprises the following steps:
s1, mixing 3.9kg of propylene glycol and 0.36kg of composite corrosion inhibitor, heating to 100 ℃, stirring to form mixed liquid, and naturally cooling to room temperature;
s2, heating 3.9kg of propylene glycol to 70 ℃, then adding 1.28kg of PEG-200, stirring and mixing uniformly, then adding 75g of sodium polyaspartate and 3g of methyl blue in sequence, stirring for 10min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S1, and stirring for 10min to obtain a mixture;
s3, adding 0.467kg of ionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, stirring and adjusting the pH value to 8.0, adding 150g of glycerol polyoxypropylene ether, and uniformly stirring.
The composite corrosion inhibitor consists of 0.7kg of water-soluble polyaniline, 1.4kg of triazole silane compound, 0.5kg of capric acid, 0.3kg of suberic acid and 0.7kg of alkyl glucoside.
The selection of the sodium polyaspartate, the glycerol polyoxypropylene ether, the water-soluble polyaniline, the triazole silane compound, and the alkyl glycoside (APG) are the same as those in example 3, and specific reference is made to example 3.
Example 5
The preparation method of the automobile antifreeze coolant comprises the following steps:
s1, mixing 3.725kg of propylene glycol and 0.392kg of composite corrosion inhibitor, heating to 100 ℃, stirring to form mixed liquid, and naturally cooling to room temperature;
s2, heating 3.725kg of propylene glycol to 70 ℃, adding 1.36kg of PEG-200, stirring and mixing uniformly, then adding 72g of sodium polyaspartate and 2g of methyl blue in sequence, stirring for 10min, cooling to room temperature, mixing with the mixed liquid obtained in the step S1, and stirring for 10min to obtain a mixture;
s3, adding 0.709kg of deionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, stirring to adjust the pH value to 8.0, adding 150g of glycerol polyoxypropylene ether, and uniformly stirring.
The composite corrosion inhibitor consists of 0.82kg of water-soluble polyaniline, 1.25kg of triazole silane compound, 0.65kg of capric acid, 0.45kg of suberic acid and 0.75kg of alkyl glucoside.
The selection of the sodium polyaspartate, the glycerol polyoxypropylene ether, the water-soluble polyaniline, the triazole silane compound, and the alkyl glycoside (APG) are the same as those in example 3, and specific reference is made to example 3.
Comparative example 1
The composition and production method of the antifreeze coolant of this comparative example were the same as those of example 5, except that the antifreeze coolant for automobiles of this comparative example did not contain PEG-200 and was replaced with propylene glycol, i.e., the total amount of propylene glycol added was 8.81kg, which was added in two portions, each of which was 4.405, according to the production method thereof.
Comparative example 2
The components and the preparation method of the antifreeze coolant of the comparative example are the same as those in example 5, except that the composite corrosion inhibitor of the antifreeze coolant for automobiles in the comparative example does not contain water-soluble polyaniline and the addition amount of the triazole silane compound is 2.07kg, that is, the water-soluble polyaniline is replaced by the triazole silane compound.
Comparative example 3
The components and preparation method of the antifreeze coolant of the comparative example are the same as those in example 5, except that the composite corrosion inhibitor of the antifreeze coolant for automobiles in the comparative example does not contain the triazolesilane compound, and the addition amount of the water-soluble polyaniline is 2.07kg, namely the triazolesilane compound is replaced by the water-soluble polyaniline.
Comparative example 4
The components and the preparation method of the antifreeze coolant of the comparative example were the same as those of example 5, except that the composite corrosion inhibitor of the antifreeze coolant for automobiles in the comparative example did not contain the triazole silane compound and the water-soluble polyaniline, and the addition amounts of the decanoic acid and the suberic acid were modified to 1.47kg and 2kg, respectively.
Comparative example 5
The components and the preparation method of the antifreeze coolant of the present comparative example were the same as those of example 5, except that the composite corrosion inhibitor of the antifreeze coolant for automobiles in the present comparative example did not contain capric acid and suberic acid, and the addition amounts of the triazolesilane compound and the water-soluble polyaniline were modified to 2kg and 1.47kg, respectively.
The anti-corrosion performance of the anti-freezing cooling liquid prepared in the above examples 1-5 and comparative examples 1-5 was tested, the glassware corrosion repeatability test was performed according to SH/T0085-1991, and the heat transfer corrosion performance test of the cast aluminum alloy was performed according to SH/T0620-1995, and the test results are shown in the following table 1.
TABLE 1 glassware corrosion and cast aluminum Heat transfer Experimental data
As can be seen from the detection results in Table 1, the composite corrosion inhibitor of the present application has excellent corrosion resistance to various metals and metal alloys, and the components cooperate with each other to make the corrosion resistance to metals better.
The antifreeze coolants prepared in the above examples 1 to 5 were left at 90 ℃ for 1 month, and it was observed that no gel or no precipitate was produced in the antifreeze coolants, and the present inventors have excellent storage stability.
The antifreeze coolants prepared in the above examples 1 to 5 and comparative examples 1 to 5 were tested for freezing point, boiling point and thermal conductivity, and were left at-50 ℃ and 100 ℃ for 24 hours to observe whether phase separation occurred, and the test results are shown in Table 2 below.
TABLE 2 Performance test results for antifreeze coolants
| Boiling point (. degree.C.) | Freezing point (. degree. C.) | Thermal conductivity W/(m.K) | High temperature stability | Stability at Low temperature | |
| Example 1 | 210 | -69 | 0.576 | Homogeneous phase | Homogeneous phase |
| Example 2 | 216 | -72 | 0.608 | Homogeneous phase | Homogeneous phase |
| Example 3 | 204 | -74 | 0.613 | Homogeneous phase | Homogeneous phase |
| Example 4 | 213 | -72 | 0.594 | Homogeneous phase | Homogeneous phase |
| Example 5 | 220 | -75 | 0.625 | Homogeneous phase | Homogeneous phase |
| Comparative example 1 | 190 | -55 | 0.536 | Homogeneous phase | Phase separation |
| Comparative example 2 | 180 | -70 | 0.635 | Homogeneous phase | Homogeneous phase |
| Comparative example 3 | 235 | -65 | 0.538 | Phase separation | Homogeneous phase |
| Comparative example 4 | 172 | -60 | 0.524 | Homogeneous phase | Homogeneous phase |
| Comparative example 5 | 218 | -73 | 0.619 | Homogeneous phase | Homogeneous phase |
As can be seen from the detection results in Table 2, the antifreeze coolant has a low freezing point and a high boiling point, can resist high and low temperatures, can be used for a long time in a high and low temperature environment, has high stability, has high heat transfer efficiency, and is beneficial to quick cooling of a cooling system.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The automobile anti-freezing cooling liquid is characterized by comprising the following raw materials in percentage by weight: 70-80% of propylene glycol, 10-15% of PEG-200, 3.5-4.3% of a composite corrosion inhibitor, 0.5-0.8% of sodium polyaspartate, 0-0.05% of a coloring agent, 0.1-0.2% of a polyether defoaming agent and the balance of deionized water;
the composite corrosion inhibitor is composed of water-soluble polyaniline, a triazole silane compound, capric acid, suberic acid and alkyl glycoside.
2. The automobile antifreeze coolant of claim 1, wherein the antifreeze coolant comprises the following raw materials in percentage by weight: 60-75% of propylene glycol, 10-15% of PEG-200, 0.5-1% of water-soluble polyaniline, 1-1.5% of triazole silane compound, 0.5-0.8% of capric acid, 0.3-0.6% of suberic acid, 0.7-0.9% of alkyl glycoside, 0.5-0.8% of sodium polyaspartate, 0.02-0.05% of colorant, 0.1-0.2% of polyether defoamer and the balance of deionized water.
3. The automobile antifreeze coolant according to claim 1 or 2, wherein the triazolesilane compound is a compound having both an alkoxysilyl group and a 1,2, 4-triazole ring in the molecule.
4. The antifreeze coolant for automobiles of claim 3, wherein the preparation method of the triazole silane compound is as follows: adding a triazole compound into ethanol, uniformly stirring, then adding 30 wt% of sodium ethoxide ethanol solution, stirring for 40min, then adding 2-chloroethyl trimethoxysilane, heating to 60-70 ℃, stirring for 3-4 h, cooling to normal temperature, filtering, and distilling the filtrate under reduced pressure.
5. The automobile antifreeze coolant as set forth in claim 4, wherein the ratio of said triazole compound to ethanol is 2 mol/L; the molar mass ratio of the triazole compound to 2-chloroethyltrimethoxysilane is 1: 1; the molar mass ratio of the triazole compound to the solute contained in the sodium ethoxide ethanol solution is 1: 1.
6. the antifreeze coolant for automobiles according to claim 5, wherein said triazole compound is any one of 3-methyl-1, 2, 4-triazole and 3-amino-1, 2, 4-triazole.
7. The automobile antifreeze coolant of claim 1 or 2, wherein said coloring agent is any one of methyl orange, fluorescent green, methyl blue, and methyl red.
8. The antifreeze coolant for automobiles according to claim 1 or 2, wherein the polyether defoamer is any one of glycerol polyoxypropylene ether, polyoxyethylene polyoxypropylene pentaerythritol ether or polyoxyethylene polyoxypropylene amine ether.
9. The method for preparing the automobile antifreeze coolant as claimed in any of claims 1 or 2, which comprises the following steps:
s1, weighing the antifreezing cooling liquid according to the weight percentage;
s2, mixing 1/2 propylene glycol and the composite corrosion inhibitor, heating to 90-100 ℃, stirring to form a mixed liquid, and naturally cooling to room temperature;
s3, heating the other 1/2 of propylene glycol to 60-75 ℃, adding PEG-200, stirring and mixing uniformly, then adding the sodium polyaspartate and the colorant in sequence, stirring for 5-10 min, cooling to room temperature, then mixing with the mixed liquid obtained in the step S2, and stirring for 5min to obtain a mixture;
s4, adding deionized water into the mixture obtained in the step S3, uniformly mixing, adding sodium hydroxide, adjusting the pH value to 7.5-8.5, adding a polyether defoamer, and uniformly stirring.
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