CN113969143A - Wind turbine generator cooling liquid with chelation effect and preparation method thereof - Google Patents
Wind turbine generator cooling liquid with chelation effect and preparation method thereof Download PDFInfo
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- 239000000110 cooling liquid Substances 0.000 title claims abstract description 50
- 230000009920 chelation Effects 0.000 title claims description 7
- 230000000694 effects Effects 0.000 title abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 44
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000012964 benzotriazole Substances 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 14
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- GYBINGQBXROMRS-UHFFFAOYSA-J tetrasodium;2-(1,2-dicarboxylatoethylamino)butanedioate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CC(C([O-])=O)NC(C([O-])=O)CC([O-])=O GYBINGQBXROMRS-UHFFFAOYSA-J 0.000 claims abstract description 10
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 7
- QOUJVMYUVAQNQM-UHFFFAOYSA-N 2-(1,2-dicarboxyethylamino)butanedioic acid;sodium Chemical compound [Na].OC(=O)CC(C(O)=O)NC(C(O)=O)CC(O)=O QOUJVMYUVAQNQM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000007850 fluorescent dye Substances 0.000 claims abstract description 3
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 10
- 235000010234 sodium benzoate Nutrition 0.000 claims description 10
- 239000004299 sodium benzoate Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- DXIHILNWDOYYCH-UHDJGPCESA-M sodium;(e)-3-phenylprop-2-enoate Chemical compound [Na+].[O-]C(=O)\C=C\C1=CC=CC=C1 DXIHILNWDOYYCH-UHDJGPCESA-M 0.000 claims description 4
- ZDFKSZDMHJHQHS-UHFFFAOYSA-N 2-tert-butylbenzoic acid Chemical compound CC(C)(C)C1=CC=CC=C1C(O)=O ZDFKSZDMHJHQHS-UHFFFAOYSA-N 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 31
- 230000007797 corrosion Effects 0.000 abstract description 30
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 25
- 238000003860 storage Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 238000009472 formulation Methods 0.000 description 24
- 239000000243 solution Substances 0.000 description 16
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 239000003112 inhibitor Substances 0.000 description 7
- 230000010287 polarization Effects 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 229910000553 6063 aluminium alloy Inorganic materials 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- 238000001453 impedance spectrum Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000002738 chelating agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- AEDZKIACDBYJLQ-UHFFFAOYSA-N ethane-1,2-diol;hydrate Chemical group O.OCCO AEDZKIACDBYJLQ-UHFFFAOYSA-N 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 125000000623 heterocyclic group Chemical group 0.000 description 2
- -1 imino sodium disuccinate Chemical compound 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- 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
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
-
- 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
-
- 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
- C23F15/00—Other methods of preventing corrosion or incrustation
- C23F15/005—Inhibiting incrustation
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a wind turbine generator cooling liquid with a chelating effect and a preparation method thereof, wherein the wind turbine generator cooling liquid comprises the following raw materials: 20-60% of ethylene glycol; 0.1 to 0.25 percent of benzotriazole; 0.1 to 0.25 percent of mercaptobenzothiazole; 2-5% of benzoate; 0.02 to 0.20 percent of iminodisuccinic acid sodium; the balance being deionized water. The preparation method comprises the following steps: firstly, adding deionized water into ethylene glycol, then sequentially adding benzotriazole, mercaptobenzothiazole, benzoate and sodium iminodisuccinate, adjusting the pH value to 8.0-8.5 by using NaOH, stirring until the mixture is clear and transparent, and then adding a water-based fluorescent dye to obtain the cooling liquid of the wind turbine generator. The obtained wind turbine generator cooling liquid can effectively solve the problems of corrosion of aluminum alloy, storage stability and the like, has the advantages of good heat dissipation performance, environmental protection, no pollution and long service life, and has a very good protection effect on a wind turbine converter.
Description
Technical Field
The invention relates to the field related to cooling of wind turbine generators, in particular to a wind turbine generator cooling liquid with a chelating effect and a preparation method thereof, and the wind turbine generator cooling liquid has a good corrosion inhibition effect on an aluminum radiator of a wind turbine generator.
Background
In recent years, wind power generation has been rapidly developed as a renewable clean energy source. More and more wind generating sets are put into construction and operation in China, and the installed capacity of a single fan is larger and larger. Wind power generation is a process of converting wind energy into mechanical energy and further converting the mechanical energy into electrical energy. In the operation process, a converter in the wind generating set can generate a large amount of heat, if the heat cannot be dissipated in time, the normal work of the converter can be seriously influenced by the temperature rise, and even devices are burnt. The working principle of the cooling system of the wind turbine generator system is that a water pump drives cooling liquid in a closed pipeline to exchange heat, and the cooling liquid after absorbing heat carries out secondary heat exchange with cooling air through an air cooler, so that the temperature of the system is reduced. The working efficiency of the cooling system directly affects the working efficiency of the converter and the generating efficiency of the wind turbine generator. The cooling liquid is used as a cooling medium of a frequency converter cooling system, and needs to have a low-temperature anti-freezing effect at low temperature in a severe cold area and an anti-corrosion effect at high temperature.
The aluminum alloy has the characteristics of light density, low cost, good heat conductivity and the like, and becomes one of the main materials used by the cooling system of the wind turbine. At present, most of wind power cooling liquid directly adopts an engine antifreeze, and along with the increase of the single machine capacity of a wind power generator and the extension of the running time of the wind power generator, the wind power cooling system gradually has the problems of corrosion, perforation and water leakage, so that the normal operation of the wind power generator is damaged, and huge economic loss is caused.
Although aluminum is an amphoteric metal, aluminum can form a stable natural oxide film on the surface of aluminum in an atmospheric environment and in an aqueous solution with the pH value of 6-8.5, and has certain corrosion resistance. However, when the solution contains etching ions, the passivation film may be defective to cause pitting, which affects the corrosion resistance of aluminum. Therefore, the development of a cooling liquid meeting the requirements of a large-capacity wind turbine is also important for research.
The cooling liquid mainly comprises an antifreezing agent, a corrosion inhibitor, a defoaming agent, a coloring agent, a mildew preventive, a buffering agent and the like, has good fluidity, can take away redundant energy and protects the normal operation of the converter. At present, the cooling liquid of the automobile engine is ethylene glycol-water solution, additives in the cooling liquid are divided into organic type and inorganic type, the inorganic type additive cooling liquid mostly uses a silicate formula with low price, the cooling liquid has poor stability, and precipitates are easy to generate, so that the pipeline of a cooling system is blocked, and serious accidents are caused. The organic additive has the characteristics of low consumption and long service life, and has good synergistic effect with the inorganic salt corrosion inhibitor. However, the wind power industry has the particularity of using the converter, the converter heat exchange system is different from an engine heat exchanger essentially, and the operating environment and the temperature of the cooling liquid are different greatly, so that the anti-freezing liquid for the engine cannot be directly used as the cooling liquid for the frequency converter of the wind turbine generator. Particularly, the aluminum alloy has high activity, and the existence of some impurity heavy metal ions can cause serious pitting corrosion of the aluminum alloy. In addition, metal ions such as copper and iron also catalyze the accelerated oxidation of ethylene glycol to glycolic acid, which aggravates corrosion of the heat exchange material. At present, some common automobile cooling liquid formulas have poor protection effects on aluminum alloy.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the wind turbine generator cooling liquid with the chelating effect and the preparation method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: the wind turbine generator cooling liquid with the chelation function is composed of glycol-water solution, a heterocyclic corrosion inhibitor, a benzoate corrosion inhibitor, a heavy metal chelating agent and the like, and is characterized by comprising the following raw materials in percentage by weight:
20-60% of ethylene glycol;
0.1 to 0.25 percent of benzotriazole;
0.1 to 0.25 percent of mercaptobenzothiazole;
2-5% of benzoate;
0.02 to 0.20 percent of iminodisuccinic acid sodium;
the balance being deionized water.
Further, the heavy metal chelating agent is sodium iminodisuccinate.
Further, the pH value of the cooling liquid is 8.0-8.5.
Furthermore, the heterocyclic corrosion inhibitor is a compound of benzotriazole and mercaptobenzothiazole.
Further, the benzoate corrosion inhibitor is one or more of sodium benzoate, sodium cinnamate and tert-butyl benzoic acid.
The preparation method comprises the following steps: firstly, adding deionized water into ethylene glycol, then sequentially adding benzotriazole, mercaptobenzothiazole, benzoate and sodium iminodisuccinate, adjusting the pH value to 8.0-8.5 by using NaOH, stirring until the mixture is clear and transparent, and then adding a water-based fluorescent dye to obtain the wind turbine generator cooling liquid.
Compared with the prior art, the invention has the following advantages and effects:
the wind turbine cooling liquid provided by the invention has a good corrosion inhibition effect on a wind turbine converter cooling system because the components of the wind turbine cooling liquid except water are long-acting organic substances, and the problems of precipitation, precipitation and the like of inorganic additives cannot occur after long-time storage, particularly because the composite chelating agent with a complexing effect on metals such as copper, iron and the like is added, the composite synergistic effect is achieved, the pitting corrosion of aluminum alloy caused by heavy metal ions can be avoided, and the aluminum alloy corrosion failure caused by the catalytic acceleration of glycol oxidation and acidification of the heavy metal ions can be avoided, so that a good corrosion inhibition effect is achieved.
In addition, the wind motor cooling liquid disclosed by the invention is transparent and clear in solution, accords with the development direction of wind power cooling technology, effectively solves the problems of corrosion of an aluminum radiator, storage stability of the cooling liquid and the like, has the advantages of good heat dissipation performance, environmental friendliness, no pollution and long service life, and has a very good protection effect on a wind motor converter.
Drawings
FIG. 1 is an impedance spectrum of 3003 aluminum alloy in 4 formulations.
FIG. 2 is an impedance spectrum of 6063 aluminum alloy in 4 formulations.
FIG. 3 is a plot of polarization of 3003 aluminum alloy in formulations 1(a), 2(b), 3(c), and 4 (d).
FIG. 4 is a plot of polarization of 6063 aluminum alloy in formulation 1(a), formulation 2(b), formulation 3(c), and formulation 4 (d).
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Example 1.
In the embodiment, the wind turbine generator cooling liquid with the chelation function comprises the following raw materials in percentage by weight:
60 percent of ethylene glycol
0.1 percent of benzotriazole
0.1 percent of mercaptobenzothiazole
2 percent of sodium benzoate
0.02 percent of imino sodium disuccinate
The balance being deionized water.
The preparation method comprises the following steps: preparing glycol-water bath solution by using deionized water and glycol, sequentially adding benzotriazole, mercaptobenzothiazole, sodium benzoate and sodium iminodisuccinate into the obtained glycol-water solution, stirring after adding one raw material each time, adding another raw material after the solution is clarified, and finally obtaining the cooling liquid of the wind turbine generator.
Example 2.
In the embodiment, the wind turbine generator cooling liquid with the chelation function comprises the following raw materials in percentage by weight:
ethylene glycol 40%
0.15 percent of benzotriazole
0.15 percent of mercaptobenzothiazole
Sodium benzoate 3%
0.05 percent of imino sodium disuccinate
The balance being deionized water.
The preparation method comprises the following steps: preparing glycol-water bath solution by using deionized water and glycol, sequentially adding benzotriazole, mercaptobenzothiazole, sodium benzoate and sodium iminodisuccinate into the obtained glycol-water solution, stirring after adding one raw material each time, adding another raw material after the solution is clarified, adding NaOH to adjust the pH value to 8.0, and finally obtaining the cooling liquid of the wind turbine generator.
Example 3.
In the embodiment, the wind turbine generator cooling liquid with the chelation function comprises the following raw materials in percentage by weight:
ethylene glycol 30%
0.20 percent of benzotriazole
0.20 percent of mercaptobenzothiazole
Sodium benzoate 3%
1 percent of sodium cinnamate
0.1 percent of iminodisuccinic acid sodium salt
The balance being deionized water.
The preparation method comprises the following steps: preparing ethylene glycol-water bath solution by using deionized water and ethylene glycol, sequentially adding benzotriazole, mercaptobenzothiazole, sodium benzoate, sodium cinnamate and sodium iminodisuccinate into the obtained ethylene glycol-water solution, stirring after adding one raw material each time, adding another raw material after the solution is clarified, adding NaOH to adjust the pH value to 8.5, and finally obtaining the cooling liquid of the wind turbine generator.
Example 4.
20 percent of ethylene glycol
0.25 percent of benzotriazole
0.25 percent of mercaptobenzothiazole
Sodium benzoate 5%
0.20 percent of iminodisuccinic acid sodium salt
The balance being deionized water.
The preparation method comprises the following steps: preparing glycol-water bath solution by using deionized water and glycol, sequentially adding benzotriazole, mercaptobenzothiazole, sodium benzoate and sodium iminodisuccinate into the obtained glycol-water solution, stirring after adding one raw material each time, adding another raw material after the solution is clarified, adding NaOH to adjust the pH value to 8.5, and finally obtaining the cooling liquid of the wind turbine generator.
Comparative example 1.
And (3) carrying out physical and chemical property tests on the wind turbine cooling liquid obtained in the embodiment 1-the embodiment 4.
TABLE 1 Coolant sample pH, reserve alkalinity, and conductivity
| Sample numbering | pH value | Reserve alkalinity (mL) | Conductivity (μ S/cm) |
| Formulation 1 | 7.99 | 4.6 | 1450 |
| Formulation 2 | 8.51 | 7.1 | 3200 |
| Formulation 3 | 8.49 | 6.9 | 3400 |
| Formulation 4 | 8.49 | 6.9 | 5200 |
The data in Table 1 show that the pH of the 4 formulations fell between approximately 8.0 and 8.5. The reserve alkalinity of the cooling liquid obtained by the method is 4mL of HCl, and the cooling liquid has higher reserve alkalinity, so that the cooling liquid has a long-acting protection effect on the aluminum alloy.
Comparative example 2.
And carrying out corrosion coupon experiments on the cooling liquid of the wind turbine generator obtained in the embodiments 1 to 4 according to SH/T0085-91 standard.
Selecting an aluminum hanging piece with the size of 50.0mm multiplied by 25.0mm multiplied by 1.5mm, grinding the aluminum hanging piece by metallographic abrasive paper, then respectively immersing the aluminum hanging piece into the cooling liquid of the wind turbine generator set obtained in the embodiments 1-4 for 336 +/-2 h (88 +/-2 ℃), taking out the aluminum hanging piece, brushing the aluminum hanging piece by a soft brush, removing a film and weighing the aluminum hanging piece, wherein the obtained experimental results are shown in table 2. The coolants in examples 1-4 were identified as formulations 1-4 and were blank compared.
TABLE 2 Mass and weight loss ratio of each sample before and after corrosion test
As can be seen from Table 2, the weight loss of the aluminum alloy after the corrosion soaking test in all the formulas is less than 30mg, which is far lower than the corrosion weight loss data of the aluminum alloy by the currently commercially available cooling liquid.
Comparative example 3.
And carrying out electrochemical experiments on corrosion of the aluminum alloy material on the cooling liquid of the wind turbine generator obtained in the examples 1 to 4.
Referring to FIG. 1, 3003 aluminum alloy has charge transfer resistance values greater than 100 kOmegacm for four formulations-2The four cooling liquid formulas have good protection effect on 3003 aluminum alloy.
Referring to fig. 2, 6063 series aluminum alloy impedance spectrum;
the impedance spectrum of the 6063 aluminum alloy is similar to that of the 3003 series aluminum alloy. The charge transfer resistance value of 6063 aluminum alloy in four formulas is more than 100k omega cm-2The formula of the four cooling liquids shows that the 6063 aluminum alloy has good protection effect.
Referring to fig. 3, a 3003 series aluminum alloy polarization curve;
TABLE 33003 summary of polarization curve fitting data for aluminum alloys in 4 formulations of coolants
| Cooling liquid | Corrosion potential/V | Corrosion current density/(A. cm)-2) | Cathode slope/(1/V) | Anode slope/(1/V) |
| Formulation 1 | -0.8997 | 1.193×10-7 | -5.252 | 6.715 |
| Formulation 2 | -0.9191 | 3.178×10-7 | -7.765 | 1.345 |
| Formulation 3 | -0.8971 | 3.049×10-7 | -5.868 | 9.077 |
| Formulation 4 | -0.9842 | 1.042×10-6 | -7.962 | 4.594 |
Referring to fig. 4, a 6063 series aluminum alloy polarization curve;
summary of polarization curve fitting data for aluminum alloys of Table 46063 in 4 formulations of coolants
| Cooling liquid | Corrosion potential/V | Corrosion current density/(A. cm)-2) | Cathode slope/(1/V) | Anode slope/(1/V) |
| Formulation 1 | -0.8496 | 7.124×10-7 | -10.764 | 6.279 |
| Formulation 2 | -0.8652 | 9.541×10-8 | -6.769 | 2.342 |
| Formulation 3 | -0.9754 | 1.056×10-6 | -7.032 | 3.562 |
| Formulation 4 | -0.8751 | 2.575×10-7 | -2.278 | 2.351 |
The polarization curve test shows that the corrosion electrochemical process of the cooling liquid with 4 formulations added with corrosion inhibitor is obviously inhibited no matter 3003 series aluminum alloy or 6063 series aluminum alloy, and the corrosion current density is less than 1.1 multiplied by 10- 6A·cm-2It is proved that the aluminum alloy protective agent has good protective effect on aluminum alloy.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. The wind turbine generator cooling liquid with the chelation function is characterized by comprising the following raw materials in percentage by weight:
20-60% of ethylene glycol;
0.1 to 0.25 percent of benzotriazole;
0.1 to 0.25 percent of mercaptobenzothiazole;
2-5% of benzoate;
0.02 to 0.20 percent of iminodisuccinic acid sodium;
the balance being deionized water.
2. The chelating wind turbine generator coolant as set forth in claim 1, wherein the benzotriazole and mercaptobenzothiazole form a complex.
3. The chelating wind turbine generator system coolant as set forth in claim 1, wherein the benzoate is one or more of sodium benzoate, sodium cinnamate, and tert-butyl benzoic acid.
4. A method for preparing the chelating wind turbine generator coolant as set forth in any one of claims 1 to 3, characterized in that the process is as follows: firstly, adding deionized water into ethylene glycol, then sequentially adding benzotriazole, mercaptobenzothiazole, benzoate and sodium iminodisuccinate, adjusting the pH value to 8.0-8.5 by using NaOH, stirring until the mixture is clear and transparent, and then adding a water-based fluorescent dye to obtain the cooling liquid of the wind turbine generator.
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| CN202111150195.4A CN113969143A (en) | 2021-09-29 | 2021-09-29 | Wind turbine generator cooling liquid with chelation effect and preparation method thereof |
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|---|---|---|---|---|
| DE19527572A1 (en) * | 1995-07-28 | 1997-01-30 | Bayer Ag | Biodegradable succinimide or aspartic acid polymers - contain imino:di:succinate units, useful as metal chelating agents, incrustation inhibitors, dispersants or builders |
| JP2008303359A (en) * | 2007-06-11 | 2008-12-18 | Success Navigation:Kk | Modifier for cooling fluid and coolant liquid |
| CN102321456A (en) * | 2011-07-27 | 2012-01-18 | 上海电力学院 | Cooling liquid for automobile with all-aluminum engine and preparation method of cooling liquid |
| CN110699048A (en) * | 2019-09-06 | 2020-01-17 | 华电电力科学研究院有限公司 | Cooling liquid for frequency converter of wind turbine generator and preparation method of cooling liquid |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527572A1 (en) * | 1995-07-28 | 1997-01-30 | Bayer Ag | Biodegradable succinimide or aspartic acid polymers - contain imino:di:succinate units, useful as metal chelating agents, incrustation inhibitors, dispersants or builders |
| JP2008303359A (en) * | 2007-06-11 | 2008-12-18 | Success Navigation:Kk | Modifier for cooling fluid and coolant liquid |
| CN102321456A (en) * | 2011-07-27 | 2012-01-18 | 上海电力学院 | Cooling liquid for automobile with all-aluminum engine and preparation method of cooling liquid |
| CN110699048A (en) * | 2019-09-06 | 2020-01-17 | 华电电力科学研究院有限公司 | Cooling liquid for frequency converter of wind turbine generator and preparation method of cooling liquid |
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| 肯•盖泽, 上海科学技术出版社 * |
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