CN116875982A - Diesel locomotive cooling liquid slow-release additive, cooling liquid and additive preparation method - Google Patents
Diesel locomotive cooling liquid slow-release additive, cooling liquid and additive preparation method Download PDFInfo
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- CN116875982A CN116875982A CN202310641694.6A CN202310641694A CN116875982A CN 116875982 A CN116875982 A CN 116875982A CN 202310641694 A CN202310641694 A CN 202310641694A CN 116875982 A CN116875982 A CN 116875982A
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- corrosion inhibition
- diesel locomotive
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- 239000000110 cooling liquid Substances 0.000 title claims abstract description 63
- 239000000654 additive Substances 0.000 title claims abstract description 50
- 230000000996 additive effect Effects 0.000 title claims abstract description 50
- 230000003137 locomotive effect Effects 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 230000007797 corrosion Effects 0.000 claims abstract description 107
- 238000005260 corrosion Methods 0.000 claims abstract description 107
- 230000005764 inhibitory process Effects 0.000 claims abstract description 77
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 19
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 19
- 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 claims abstract description 18
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 18
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 18
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 18
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 18
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 18
- 239000004246 zinc acetate Substances 0.000 claims abstract description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- 229910021538 borax Inorganic materials 0.000 claims abstract description 14
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 14
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 14
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012964 benzotriazole Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims abstract description 12
- LDKDGDIWEUUXSH-UHFFFAOYSA-N Thymophthalein Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3C(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C LDKDGDIWEUUXSH-UHFFFAOYSA-N 0.000 claims abstract description 11
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 11
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 11
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000002826 coolant Substances 0.000 claims description 7
- FDGBQHCDMSYZRC-UHFFFAOYSA-N 2-hydroxy-2-oxo-1,3,2$l^{5}-dioxaphosphinan-4-amine Chemical compound NC1CCOP(O)(=O)O1 FDGBQHCDMSYZRC-UHFFFAOYSA-N 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 29
- 239000002184 metal Substances 0.000 abstract description 29
- 150000002739 metals Chemical class 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 13
- XTOQOJJNGPEPMM-UHFFFAOYSA-N o-(2-oxo-1,3,2$l^{5}-dioxaphosphinan-2-yl)hydroxylamine Chemical compound NOP1(=O)OCCCO1 XTOQOJJNGPEPMM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000003860 storage Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000008233 hard water Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000003112 inhibitor Substances 0.000 description 28
- 238000002474 experimental method Methods 0.000 description 21
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 7
- 229910001018 Cast iron Inorganic materials 0.000 description 7
- 239000010962 carbon steel Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 150000007524 organic acids Chemical class 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 5
- 239000010951 brass Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- -1 brass Chemical class 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 3
- 230000008485 antagonism Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 238000004737 colorimetric analysis Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 235000019794 sodium silicate Nutrition 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The application belongs to the technical field of diesel locomotive cooling liquid, and provides a diesel locomotive cooling liquid slow-release additive, cooling liquid and an additive preparation method, which comprises the following steps: dissolving 3wt% of benzotriazole in ethanol, and simultaneously adding 10wt% of sodium benzoate and deionized water, and uniformly stirring; adding sodium silicate, polyethylene glycol, zinc acetate and sodium gluconate, and dissolving completely; then adding polyepoxysuccinic acid, hydroxyethylidene diphosphonic acid and aminotrimethylene phosphoric acid; after stirring uniformly, adding sodium tetraborate, gradually adding sodium hydroxide by using a pH meter to ensure that the pH of the solution is 13, and preparing the corrosion inhibition additive. Adding the corrosion inhibition additive into deionized water, and adding a few drops of thymol phthalein for color development to obtain the cooling liquid of the diesel locomotive. The application has excellent corrosion inhibition effect on various metals, has excellent long-term protection, storage stability, hard water resistance and other performances, and has simple preparation process and meets the requirements of safety and environmental protection.
Description
Technical Field
The application belongs to the technical field of diesel locomotive cooling liquid, and particularly relates to a diesel locomotive cooling liquid slow-release additive, cooling liquid and an additive preparation method.
Background
Corrosion of the cooling system of the diesel locomotive is a complex physicochemical process, which causes damage to parts, reduces the mechanical strength of the parts and even can cause traffic accidents. Therefore, it is important to develop an efficient and low-cost organic coolant corrosion inhibitor. In the early stage, most of engine coolant corrosion inhibitors in China are double components, the two components must be packaged respectively, the first component must be strictly dissolved before the coolant is prepared, then the second component is added, precipitation can be formed when the coolant is prepared improperly, the coolant is scrapped, solid substances at the bottom of the tank are increased, and trouble is caused for tank cleaning. Therefore, the two-component corrosion inhibitor is very inconvenient to use. The single-component corrosion inhibitor formula can solve the inconvenience of the traditional corrosion inhibitor in the transportation, packaging, storage and preparation processes, and saves the equipment and labor cost.
In an engine water cooling system, the cooling liquid is in contact with various metals, and in order to realize corrosion inhibition protection of the various metals, a corrosion inhibitor is required to be compounded. However, the types and the amounts of the effective corrosion inhibitors required by different metals are different, and a synergistic effect or an antagonistic effect exists among different corrosion inhibitor components. Therefore, determining the optimal dosage proportion of the corrosion inhibitor formulation and realizing synergy to avoid antagonism is still a very complex problem in the current corrosion inhibitor field.
Disclosure of Invention
The application provides a diesel locomotive cooling liquid slow-release additive, cooling liquid and an additive preparation method, and aims to solve the problems in the background technology.
The main components of the single-component corrosion inhibition additive for the cooling liquid of the diesel locomotive comprise: organic acid corrosion inhibitor, benzotriazole, sodium benzoate, sodium gluconate, sodium silicate, sodium tetraborate, polyethylene glycol, zinc acetate and color developing agent; the organic acid etching agent comprises: polyepoxysuccinic acid, hydroxyethylidene diphosphonic acid and aminotrimethylene phosphonic acid.
The preparation method of the corrosion inhibition additive comprises the following steps: s1, dissolving 3 weight percent of benzotriazole in ethanol, simultaneously adding 10 weight percent of sodium benzoate and deionized water, and uniformly stirring; s2, adding sodium silicate, polyethylene glycol, zinc acetate and sodium gluconate, and fully stirring until the sodium silicate, the polyethylene glycol, the zinc acetate and the sodium gluconate are dissolved; s3, adding polyepoxysuccinic acid, hydroxyethylidene diphosphonic acid and aminotrimethylene phosphoric acid; s4, after uniformly stirring, adding sodium tetraborate, gradually adding sodium hydroxide by using a pH meter to enable the pH value of the solution to be 13, and thus obtaining the corrosion inhibition additive. Optionally, the sodium silicate is 0.5wt%.
Optionally, the mass percentage of the polyethylene glycol is 1.5wt%.
Optionally, the zinc acetate accounts for 0.2 to 0.4 weight percent.
Optionally, the mass percentage of the sodium gluconate is 16.5-27.5 wt%.
Optionally, the mass percentage of the sodium tetraborate is 9.2-24.2 wt%.
Optionally, the mass percentage of the polyepoxysuccinic acid is 30-50wt%.
Optionally, the mass percentage of the hydroxyethylidene diphosphonic acid is 2.5-4wt%.
Alternatively, the mass percent of the aminotrimethylene phosphoric acid is 4wt%.
Adding deionized water into the diesel locomotive cooling liquid slow-release additive, and enabling the mass ratio of the diesel locomotive cooling liquid corrosion inhibition additive to water to be 1:240-280; several drops of thymol phthalein are added for color development, and the cooling liquid is obtained.
The application has the advantages that,
(1) The organic acid type corrosion inhibitor prepared by the application can provide excellent heat exchange and protection performances, and meanwhile, the corrosion inhibitor with large influence on the environment and human body caused by nitrite, amine and the like is abandoned, and the requirements of safety and environmental protection are met.
(2) The application carries out precise compounding on various corrosion inhibitors, fully plays the synergistic effect among various substances, has better corrosion inhibition effect on various metals such as brass, red copper, welding flux, cast iron, carbon steel, cast aluminum and the like, avoids antagonism effect, provides a corrosion inhibition additive formula with high-efficiency corrosion inhibition effect for a cooling system of an internal combustion locomotive, has excellent long-term protectiveness, storage stability, hard water resistance and other performances, and meets the practical use requirements of high-power HXN3, HXN5 and the like and high requirements on slow release performance of the internal combustion engine.
(3) The application adds thymol phthalein color developing agent, and can visually detect the concentration of the corrosion inhibitor by non-professional staff through visual inspection and a simple colorimetric method by utilizing the principle that the chromaticity is in direct proportion to the concentration on a locomotive, thereby determining the amount of the corrosion inhibitor to be added.
(4) The corrosion inhibitor is a single component, the defect that the use of the double-component corrosion inhibitor is inconvenient is avoided, and only a non-professional is required to finish the dosing process by taking the locomotive box as a carrier when the locomotive is overhauled according to a simple proportion, any heating and pretreatment links are not required, so that unnecessary equipment expenditure and manpower are saved, and the corrosion inhibition efficiency is ensured to be fully exerted due to no precipitation and easy solubility, and no waste is caused.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps, operations, components, or modules is not limited to the particular steps, operations, components, or modules listed but may optionally include additional steps, operations, components, or modules inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The preparation method of the single-component corrosion inhibition additive for the cooling liquid of the diesel locomotive comprises the following steps of;
example 1
S1, 3wt% of benzotriazole is dissolved in a small amount of ethanol, and 10wt% of sodium benzoate and deionized water are added and stirred uniformly.
S2, adding 0.5 weight percent of sodium silicate, 1.5 weight percent of polyethylene glycol, 0.3 weight percent of zinc acetate and 16.5 weight percent of sodium gluconate in sequence, and fully stirring until the sodium silicate, the polyethylene glycol, the zinc acetate and the sodium gluconate are dissolved.
S3, adding 50wt% of polyepoxysuccinic acid, 2.5wt% of hydroxyethylidene diphosphonic acid and 4wt% of aminotrimethylene phosphoric acid.
S4, after being uniformly stirred, adding 11.7 weight percent of sodium tetraborate, and gradually adding sodium hydroxide by using a pH meter to ensure that the pH of the solution is 13, thus preparing the corrosion inhibition additive.
Preparing a cooling liquid of the diesel locomotive: 2.8g of the corrosion inhibition additive is added into 750mL of deionized water, stirred to dissolve the corrosion inhibition additive, and a few drops of thymol phthalein are added for color development, so as to prepare the cooling liquid.
Determination of corrosion inhibition rate of metals in cooling liquid:
(1) The prepared test piece bundle with the metal test piece was placed in a cooling liquid according to the standard of Q/CR183.2014 cooling liquid for internal combustion engine and covered with a plug.
(2) And (5) placing the thermometer and the vent pipe into cooling liquid to perform corrosion inhibition experiments on the metal test piece.
(3) The corrosion inhibition experiment temperature is maintained at about 80 ℃, the air flow is (100+/-10) mL/min, and the experiment time is 2 weeks.
(4) After the experiment is finished, the corrosion inhibition rate of the tested piece is calculated after the tested piece is washed and weighed, and the test result is shown in table 1.
TABLE 1 Corrosion inhibition of test pieces of different metals
| Test piece | Corrosion inhibition rate |
| Brass | 90.1％ |
| Red copper | 92.0％ |
| Solder material | 86.7％ |
| Carbon steel | 97.1％ |
| Cast aluminum | 86.0％ |
| Cast iron | 91.5％ |
Example two
S1, 3wt% of benzotriazole is dissolved in a small amount of ethanol, and 10wt% of sodium benzoate and deionized water are added and stirred uniformly.
S2, adding 0.5 weight percent of sodium silicate, 1.5 weight percent of polyethylene glycol, 0.4 weight percent of zinc acetate and 21.5 weight percent of sodium gluconate in sequence, and fully stirring until the sodium silicate, the polyethylene glycol, the zinc acetate and the sodium gluconate are dissolved.
S3, 40wt% of polyepoxysuccinic acid, 2.5wt% of hydroxyethylidene diphosphonic acid and 4wt% of aminotrimethylene phosphoric acid are then added.
S4, after being uniformly stirred, adding 16.6wt% of sodium tetraborate, and gradually adding sodium hydroxide by using a pH meter to enable the pH of the solution to be 13, so as to prepare the corrosion inhibition additive.
Preparing a cooling liquid of the diesel locomotive: 3.1g of the corrosion inhibition additive is added into 750mL of deionized water, the mixture is stirred fully to dissolve the corrosion inhibition additive, and a few drops of thymol phthalein are added for color development, so that the cooling liquid is prepared.
Determination of corrosion inhibition rate of metals in cooling liquid:
(1) The prepared test piece bundle with the metal test piece was placed in a cooling liquid according to the standard of Q/CR183.2014 cooling liquid for internal combustion engine and covered with a plug.
(2) And (5) placing the thermometer and the vent pipe into cooling liquid to perform corrosion inhibition experiments on the metal test piece.
(3) The corrosion inhibition experiment temperature is maintained at about 80 ℃, the air flow is (100+/-10) mL/min, and the experiment time is 2 weeks.
(4) After the experiment is finished, the corrosion inhibition rate of the tested piece is calculated after the tested piece is washed and weighed, and the test result is shown in table 2.
TABLE 2 Corrosion inhibition of test pieces of different metals
Example III
S1, 3wt% of benzotriazole is dissolved in a small amount of ethanol, and 10wt% of sodium benzoate and deionized water are added and stirred uniformly.
S2, adding 0.5 weight percent of sodium silicate, 1.5 weight percent of polyethylene glycol, 0.3 weight percent of zinc acetate and 27.5 weight percent of sodium gluconate in sequence, and fully stirring to dissolve the materials.
S3, adding 40wt% of polyepoxysuccinic acid, 4wt% of hydroxyethylidene diphosphonic acid and 4wt% of aminotrimethylene phosphoric acid.
S4, after being uniformly stirred, adding 9.2 weight percent of sodium tetraborate, and gradually adding sodium hydroxide by using a pH meter to ensure that the pH of the solution is 13.
Preparing a cooling liquid of the diesel locomotive: 3.68g of the corrosion inhibition additive is added into 750mL of deionized water, the mixture is stirred fully to dissolve the corrosion inhibition additive, and a few drops of thymol phthalein are added for color development, so that the cooling liquid is prepared.
Determination of corrosion inhibition rate of metals in cooling liquid:
(1) The prepared test piece bundle with the metal test piece was placed in a cooling liquid according to the standard of Q/CR183.2014 cooling liquid for internal combustion engine and covered with a plug.
(2) And (5) placing the thermometer and the vent pipe into cooling liquid to perform corrosion inhibition experiments on the metal test piece.
(3) The corrosion inhibition experiment temperature is maintained at about 80 ℃, the air flow is (100+/-10) mL/min, and the experiment time is 2 weeks.
(4) After the experiment is finished, the corrosion inhibition rate of the tested piece is calculated after the tested piece is washed and weighed, and the test result is shown in table 3.
TABLE 3 Corrosion inhibition of test pieces of different metals
Example IV
S1, 3wt% of benzotriazole is dissolved in a small amount of ethanol, and 10wt% of sodium benzoate and deionized water are added and stirred uniformly.
S2, adding 0.5 weight percent of sodium silicate, 1.5 weight percent of polyethylene glycol, 0.2 weight percent of zinc acetate and 27.5 weight percent of sodium gluconate in sequence, and fully stirring until the sodium silicate, the polyethylene glycol, the zinc acetate, the sodium gluconate and the sodium tetraborate are dissolved.
S3, adding 30wt% of polyepoxysuccinic acid, 2.5wt% of hydroxyethylidene diphosphonic acid and 4wt% of aminotrimethylene phosphoric acid.
S4, after being uniformly stirred, adding 20.8 weight percent of sodium tetraborate, and gradually adding sodium hydroxide by using a pH meter to ensure that the pH of the solution is 13, thus preparing the corrosion inhibition additive.
Preparing a cooling liquid of the diesel locomotive: 2.8g of corrosion inhibition additive is added into 750mL of deionized water, stirred to dissolve the corrosion inhibition additive, and thymol phthalein is added for color development, thus obtaining the cooling liquid.
Determination of corrosion inhibition rate of metals in cooling liquid:
(1) The prepared test piece bundle with the metal test piece was placed in a cooling liquid according to the standard of Q/CR183.2014 cooling liquid for internal combustion engine and covered with a plug.
(2) And (5) placing the thermometer and the vent pipe into cooling liquid to perform corrosion inhibition experiments on the metal test piece.
(3) The corrosion inhibition experiment temperature is maintained at about 80 ℃, the air flow is (100+/-10) mL/min, and the experiment time is 2 weeks.
(4) After the experiment is finished, the corrosion inhibition rate of the tested piece is calculated after the tested piece is washed and weighed, and the test result is shown in table 4.
TABLE 4 Corrosion inhibition of test pieces of different metals
| Test piece | Corrosion inhibition rate |
| Brass | 95.2％ |
| Red copper | 84％ |
| Solder material | 97.6％ |
| Carbon steel | 89.7％ |
| Cast aluminum | 75.8％ |
| Cast iron | 94.8％ |
Example five
S1, 3wt% of benzotriazole is dissolved in a small amount of ethanol, and 10wt% of sodium benzoate and deionized water are added and stirred uniformly.
S2, adding 0.5 weight percent of sodium silicate, 1.5 weight percent of polyethylene glycol, 0.2 weight percent of zinc acetate and 16.5 weight percent of sodium gluconate in sequence, and fully stirring to dissolve the materials.
S3, 40wt% of polyepoxysuccinic acid, 3.1wt% of hydroxyethylidene diphosphonic acid and 4wt% of aminotrimethylene phosphoric acid are then added.
S4, after being uniformly stirred, adding 24.2 weight percent of sodium tetraborate, and gradually adding sodium hydroxide by using a pH meter to ensure that the pH of the solution is 13, thus preparing the corrosion inhibition additive.
Preparing a cooling liquid of the diesel locomotive: 3.68g of the corrosion inhibition additive is added into 750mL of deionized water, the mixture is stirred fully to dissolve the corrosion inhibition additive, and a few drops of thymol phthalein are added for color development, so that the cooling liquid is prepared.
Determination of corrosion inhibition rate of metals in cooling liquid:
(1) The prepared test piece bundle with the metal test piece was placed in a cooling liquid according to the standard of Q/CR183.2014 cooling liquid for internal combustion engine and covered with a plug.
(2) And (5) placing the thermometer and the vent pipe into cooling liquid to perform corrosion inhibition experiments on the metal test piece.
(3) The corrosion inhibition experiment temperature is maintained at about 80 ℃, the air flow is (100+/-10) mL/min, and the experiment time is 2 weeks.
(4) After the experiment is finished, the corrosion inhibition rate of the tested piece is calculated after the tested piece is washed and weighed, and the test result is shown in table 5.
TABLE 5 Corrosion inhibition of test pieces of different metals
| Test piece | Corrosion inhibition rate |
| Brass | 95.2％ |
| Red copper | 96％ |
| Solder material | 96.5％ |
| Carbon steel | 91.2％ |
| Cast aluminum | 87.7％ |
| Cast iron | 80.9％ |
The experiment tests show that the corrosion inhibitor applied to the cooling liquid of the diesel locomotive disclosed by the application has excellent corrosion inhibition effect on various metals, has excellent long-term protectiveness, storage stability, hard water resistance and other performances, has a simple preparation process, meets the requirements of safety and environmental protection, and meets the actual use requirements of the diesel locomotive with high power such as HXN3, HXN5 and the like and high corrosion inhibition performance requirements.
Specifically, the organic acid corrosion inhibitor prepared by the application can provide excellent heat exchange and protection performances, and meanwhile, the corrosion inhibitor with large influence on the environment and human body, such as nitrite, amine and the like, is abandoned, and the requirements of safety and environmental protection are met. The application carries out accurate compounding on various corrosion inhibition substances, fully plays the synergistic effect among the various substances, has better corrosion inhibition effect on various metals such as brass, red copper, welding flux, cast iron, carbon steel, cast aluminum and the like, avoids antagonism effect, provides a corrosion inhibition additive formula with high-efficiency corrosion inhibition effect for a cooling system of an internal combustion locomotive, has excellent long-term protectiveness, storage stability, hard water resistance and other performances, and meets the actual use requirements of high-power and high-slow-release performance requirements of the internal combustion engine such as HXN3, HXN5 and the like. The application adds thymol phthalein color developing agent, and can visually detect the concentration of the corrosion inhibitor by non-professional staff through visual inspection and a simple colorimetric method by utilizing the principle that the chromaticity is in direct proportion to the concentration on a locomotive, thereby determining the amount of the corrosion inhibitor to be added. The corrosion inhibitor is a single component, the defect that the use of the double-component corrosion inhibitor is inconvenient is avoided, and only a non-professional is required to finish the dosing process by taking the locomotive box as a carrier when the locomotive is overhauled according to a simple proportion, any heating and pretreatment links are not required, so that unnecessary equipment expenditure and manpower are saved, and the corrosion inhibition efficiency is ensured to be fully exerted due to no precipitation and easy solubility, and no waste is caused.
A single-component corrosion inhibition additive for cooling liquid of an internal combustion locomotive comprises the following components: organic acid corrosion inhibitor, benzotriazole, sodium benzoate, sodium gluconate, sodium silicate, sodium tetraborate, polyethylene glycol, zinc acetate and color developing agent; the organic acid etching agent comprises: polyepoxysuccinic acid, hydroxyethylidene diphosphonic acid and aminotrimethylene phosphonic acid. The small amount of zinc acetate can be compounded with the amino trimethylene phosphonic acid, so that the corrosion inhibition effect of the carbon steel is further improved; benzotriazole is a copper corrosion inhibitor, and can be adsorbed on the surface of copper to form a very thin film to protect copper from corrosion of harmful medium in water; the sodium benzoate can be compounded with the benzotriazole, can fill the gaps of the benzotriazole adsorption film, and has corrosion inhibition effect on cast aluminum, cast iron, soldering tin and carbon steel; sodium silicate can promote passivation of cast aluminum or form a conversion film on the surface of the cast aluminum, inhibit pitting of the cast aluminum, further reduce the generation of crack sources and improve the pitting resistance of the cast aluminum in solution; polyethylene glycol can make the film forming performance of sodium silicate more stable; the sodium tetraborate is favorable for adsorbing oxygen on the surface of the metal to promote the passivation of the metal, and has a good corrosion inhibition effect on cast iron; the sodium gluconate has excellent coordination effect and can be compounded with other corrosion inhibitors to improve the corrosion inhibition effect of the system; the color reagent is thymolphthalein, so that the concentration of the corrosion inhibition additive is judged by a visual method.
The exemplary embodiments of the present application may be combined with each other, and exemplary embodiments obtained by combining also fall within the scope of the present application.
The principles and embodiments of the present application have been described with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (10)
1. The preparation method of the diesel locomotive cooling liquid slow-release additive is characterized by comprising the following steps of:
s1, dissolving 3 weight percent of benzotriazole in ethanol, simultaneously adding 10 weight percent of sodium benzoate and deionized water, and uniformly stirring;
s2, adding sodium silicate, polyethylene glycol, zinc acetate and sodium gluconate, and fully stirring until the sodium silicate, the polyethylene glycol, the zinc acetate and the sodium gluconate are dissolved;
s3, adding polyepoxysuccinic acid, hydroxyethylidene diphosphonic acid and 4 weight percent of aminotrimethylene phosphate;
s4, after uniformly stirring, adding sodium tetraborate, gradually adding sodium hydroxide by using a pH meter to enable the pH value of the solution to be 13, and thus obtaining the corrosion inhibition additive.
2. The method for preparing the single-component corrosion inhibition additive for the cooling liquid of the diesel locomotive according to claim 1, wherein the mass percentage of the sodium silicate is 0.5wt%.
3. The method for preparing the single-component corrosion inhibition additive for the cooling liquid of the diesel locomotive according to claim 1, wherein the mass percentage of the polyethylene glycol is 1.5wt%.
4. The preparation method of the diesel locomotive cooling liquid single-component corrosion inhibition additive according to claim 1, wherein the mass percentage of zinc acetate is 0.2-0.4 wt%.
5. The preparation method of the diesel locomotive cooling liquid single-component corrosion inhibition additive according to claim 1, wherein the mass percentage of the sodium gluconate is 16.5-27.5 wt%.
6. The preparation method of the diesel locomotive cooling liquid single-component corrosion inhibition additive according to claim 1, wherein the mass percentage of the sodium tetraborate is 9.2-24.2 wt%.
7. The preparation method of the diesel locomotive cooling liquid single-component corrosion inhibition additive according to claim 1, wherein the mass percentage of the polyepoxysuccinic acid is 30-50 wt%.
8. The preparation method of the diesel locomotive cooling liquid single-component corrosion inhibition additive according to claim 1, wherein the mass percentage of the hydroxyethylidene diphosphonic acid is 2.5-4wt%.
9. A slow release additive for cooling liquid of diesel locomotive, characterized in that, the slow release additive is prepared by the preparation method of the slow release additive for cooling liquid of diesel locomotive as defined in any one of the claims 1-8.
10. The cooling liquid is characterized in that: adding deionized water into the diesel locomotive coolant slow-release additive of claim 9, and enabling the mass ratio of the diesel locomotive coolant corrosion inhibition additive to water to be 1:240-280; adding thymolphthalein for developing color to obtain cooling liquid.
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