CN114891486A - Low-conductivity automobile fuel cell antifreezing coolant and production method thereof - Google Patents
Low-conductivity automobile fuel cell antifreezing coolant and production method thereof Download PDFInfo
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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
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
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- 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
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- 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
- C23F11/16—Sulfur-containing compounds
- C23F11/165—Heterocyclic compounds containing sulfur as hetero atom
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- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a low-conductivity automobile fuel cell antifreezing coolant and a production method thereof, and the coolant is prepared by the following components by weight percent: 30 to 70 percent of ethylene glycol, 0.15 to 0.5 percent of organic corrosion inhibitor, 0.005 to 0.015 percent of defoaming agent, 0.15 to 0.3 percent of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent. According to the invention, mercaptobenzothiazole and cellulose are used as mixed metal corrosion inhibitors to generate a synergistic corrosion inhibition effect, and the chelation of mercaptobenzothiazole and metal inhibits the corrosion of metal to form metal ions, so that the low conductivity of the anti-freezing cooling liquid can be maintained for a longer time, and the normal ion exchange reaction of the fuel cell is ensured; meanwhile, the polyether modified silicone oil nonionic defoaming agent is adopted to avoid the increase of the conductivity, and the amino modified additive can provide buffer when acidic substances appear after oxidation, so that the acidic ions are prevented from corroding metals.
Description
Technical Field
The invention relates to a low-conductivity automobile fuel cell antifreezing coolant and a production method thereof, belonging to the technical field of chemical industry.
Background
The fuel cell is used as a new energy form, the energy conversion rate can reach 40% -60%, more heat can be generated in the energy conversion process, the heat needs to be conducted out in time by the anti-freezing cooling liquid in order to be unaffected in the working process of the fuel cell, and the conductivity of the anti-freezing cooling liquid needs to be lower and is lower than 20 mu s/cm in order to maintain the working condition of the fuel cell.
The freezing point can be adjusted to a proper range by adopting the ethylene glycol and the water as the base liquid of the anti-freezing cooling liquid, so that good anti-freezing and cooling effects are achieved, however, with the increase of the service time, the ethylene glycol can be oxidized to generate acidic substances, so that metals are corroded, metal ions enter the anti-freezing cooling liquid, the conductivity of the solution is increased, and the normal use of the ion exchange of the fuel cell is influenced.
Therefore, it is very important to prepare a proper anti-freezing cooling liquid to inhibit the corrosion of metal and ensure a low-conductivity environment, and the invention provides the low-conductivity automobile fuel cell anti-freezing cooling liquid and the production method thereof.
Disclosure of Invention
In order to solve the technical problems, the invention provides a low-conductivity automobile fuel cell antifreezing coolant and a production method thereof, and the specific technical scheme is as follows:
the low-conductivity automobile fuel cell antifreezing coolant is prepared from the following components in percentage by weight:
30% -70% of ethylene glycol;
0.15 to 0.5 percent of organic corrosion inhibitor;
0.005-0.015% of defoaming agent;
0.15 to 0.3 percent of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the organic corrosion inhibitor adopts one or two of cellulose and mercaptobenzothiazole, and the defoaming agent is an organic silicon type defoaming agent.
Further, the cellulose is one or more of methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose and hydroxymethyl cellulose; hydroxypropyl methylcellulose is preferably used.
Further, the mercaptobenzothiazole is one or two of 2-mercaptobenzothiazole and 6-amino-2-mercaptobenzothiazole, and is preferably 6-amino-2-mercaptobenzothiazole.
Further, the organic silicon type defoaming agent adopts one or more of polyether modified silicone oil, polydimethylsiloxane and amino polyether modified silicone oil; it is preferable to use an aminopolyether-modified silicone oil.
Further, the mass ratio of the cellulose to the mercaptobenzothiazole is in the range of 2: (0.5-0.9).
Further, the low-conductivity automobile fuel cell anti-freezing cooling liquid is prepared from the following components in percentage by weight:
40% -60% of ethylene glycol;
0.2 to 0.3 percent of cellulose;
mercaptobenzothiazole 0.13-0.23%;
0.008% -0.012% of defoaming agent;
0.2 to 0.25 percent of surfactant;
the balance is deionized water with the conductivity of less than 0.5 mu s/cm, and the sum of the weight percentages of the components of the antifreeze coolant is 100 percent.
A production method of the anti-freezing cooling liquid for the low-conductivity automobile fuel cell comprises the following steps:
calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 30 to 70 percent of ethylene glycol, 0.15 to 0.5 percent of organic corrosion inhibitor, 0.005 to 0.015 percent of defoaming agent, 0.15 to 0.3 percent of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, and all the components are added and then continuously stirred for 70 to 100 minutes at room temperature.
Further, adding one of the organic corrosion inhibitor and the defoaming agent into a reaction container, stirring at normal temperature for 10-15 minutes, and then adding the next component.
The invention has the beneficial effects that: according to the invention, mercaptobenzothiazole and cellulose are used as mixed metal corrosion inhibitors to generate a synergistic corrosion inhibition effect, and the chelation of mercaptobenzothiazole and metal inhibits the corrosion of metal to form metal ions, so that the low conductivity of the anti-freezing cooling liquid can be maintained for a longer time, and the normal ion exchange reaction of the fuel cell is ensured; meanwhile, the polyether modified silicone oil nonionic defoaming agent is adopted to avoid the increase of the conductivity, and the amino modified additive can provide buffer when acidic substances appear after oxidation, so that the acidic ions are prevented from corroding metals.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
Example 1:
the low-conductivity automobile fuel cell antifreezing coolant is prepared from the following components in percentage by weight:
30% of ethylene glycol;
0.20 percent of hydroxypropyl methyl cellulose;
0.13 percent of 6-amino-2-mercaptobenzothiazole;
0.005% of amino polyether modified silicone oil;
0.15% of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the production method of the low-conductivity automobile fuel cell antifreeze coolant comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 30% of ethylene glycol, 0.20% of hydroxypropyl methyl cellulose, 0.13% of 6-amino-2-mercaptobenzothiazole, 0.005% of amino polyether modified silicone oil, 0.15% of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein all the components are added and then continuously stirred at room temperature for 70-100 minutes.
Example 2:
the low-conductivity automobile fuel cell antifreezing coolant is prepared from the following components in percentage by weight:
40% of ethylene glycol;
0.22% of hydroxypropyl methyl cellulose;
0.14 percent of 6-amino-2-mercaptobenzothiazole;
0.007% of amino polyether modified silicone oil;
0.20% of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the production method of the low-conductivity automobile fuel cell antifreeze coolant comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the antifreeze coolant, adding ethylene glycol and deionized water with the conductivity of less than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing to ensure that the weight percentage of the components of the antifreeze coolant is as follows: 40% of ethylene glycol, 0.22% of hydroxypropyl methyl cellulose, 0.14% of 6-amino-2-mercaptobenzothiazole, 0.007% of amino polyether modified silicone oil, 0.20% of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein all the components are added and then stirred for 70-100 minutes at room temperature.
Example 3:
the low-conductivity automobile fuel cell antifreeze coolant is prepared from the following components in percentage by weight:
50% of ethylene glycol;
hydroxypropyl methylcellulose 0.24%;
0.16 percent of 6-amino-2-mercaptobenzothiazole;
0.009% of amino polyether modified silicone oil;
0.24% of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the production method of the low-conductivity automobile fuel cell antifreeze coolant comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 50% of ethylene glycol, 0.24% of hydroxypropyl methyl cellulose, 0.16% of 6-amino-2-mercaptobenzothiazole, 0.009% of amino polyether modified silicone oil, 0.24% of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein all the components are added and then continuously stirred at room temperature for 70-100 minutes.
Example 4:
the low-conductivity automobile fuel cell antifreezing coolant is prepared from the following components in percentage by weight:
60% of ethylene glycol;
hydroxypropyl methylcellulose 0.27%;
0.18 percent of 6-amino-2-mercaptobenzothiazole;
0.012% of amino polyether modified silicone oil;
0.27% of a surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the production method of the low-conductivity automobile fuel cell antifreeze coolant comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 60% of ethylene glycol, 0.27% of hydroxypropyl methyl cellulose, 0.18% of 6-amino-2-mercaptobenzothiazole, 0.012% of aminopolyether modified silicone oil, 0.27% of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein all the components are added and then continuously stirred for 70-100 minutes at room temperature.
Example 5:
the low-conductivity automobile fuel cell antifreezing coolant is prepared from the following components in percentage by weight:
70% of ethylene glycol;
hydroxypropyl methylcellulose 0.30%;
0.20 percent of 6-amino-2-mercaptobenzothiazole;
0.015 percent of amino polyether modified silicone oil;
0.30% of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the production method of the low-conductivity automobile fuel cell antifreeze coolant comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 70% of ethylene glycol, 0.30% of hydroxypropyl methyl cellulose, 0.20% of 6-amino-2-mercaptobenzothiazole, 0.015% of amino polyether modified silicone oil, 0.30% of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, wherein all the components are added and then continuously stirred at room temperature for 70-100 minutes.
The conductivity of the antifreeze cooling liquid of the scheme is not more than 15 mu s/cm.
The metal corrosion inhibitor adopts mercaptobenzothiazole as a metal corrosion inhibitor, can form a chelate with metal, increases the stability of the metal, protects the metal and inhibits the metal from being corroded to form metal ions, and preferably adopts 6-amino-2-mercaptobenzothiazole, wherein amino is taken as an alkaline group, and the amino can play a role in neutralizing and buffering when ethylene glycol is oxidized to generate oxalic acid, maintain the pH value and avoid the metal from being corroded.
The added cellulose can generate synergistic action with the organic corrosion inhibitor mercaptobenzothiazole, and the corrosion inhibition effect is improved.
The amino polyether modified silicone oil is used as the defoaming agent, the characteristics of water solubility of polyether and low surface tension of organic silicon are combined, the defoaming agent is a nonionic defoaming agent, the conductivity of a solution cannot be improved, meanwhile, the amino group is used as a basic group, the pH of an anti-freezing cooling liquid can be adjusted to be alkalescent, chronic corrosion to metal is avoided, meanwhile, generated oxalic acid can be neutralized when ethylene glycol is oxidized, and metal ionization caused by the action of ethylene glycol and a metal box body is avoided.
The amino group is used as a hydrophilic group and can be adsorbed on the surface of the metal to form a hydrophobic protective film, so that the metal is protected and the anticorrosion effect is achieved.
Comparative example:
the common commercially available fuel cell anti-freezing cooling liquid with ethylene glycol and deionized water as base liquid is adopted, the conductivity of the fuel cell anti-freezing cooling liquid is 70 mu s/cm, the aluminum alloy sheet metal is placed into the anti-freezing cooling liquid for soaking, and the aluminum alloy sheet metal is taken out after 5 days to find that the surface corrosion degree of the aluminum alloy sheet metal reaches 65 percent.
The conductivity and corrosion degree data of the antifreeze coolant and the aluminum alloy metal sheets of the above examples and comparative examples are shown in table 1:
TABLE 1
As can be seen from the data in the table, the antifreeze coolant for the fuel cell can maintain lower conductivity and play a better role in preventing corrosion of metal for a longer time.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a low conductivity automobile fuel cell antifreeze coolant which characterized in that: the paint is prepared from the following components in percentage by weight:
30% -70% of ethylene glycol;
0.15 to 0.5 percent of organic corrosion inhibitor;
0.005-0.015% of defoaming agent;
0.15 to 0.3 percent of surfactant;
the balance of deionized water with the conductivity lower than 0.5 mu s/cm, and the sum of the weight percentages of the components of the anti-freezing cooling liquid is 100 percent;
the organic corrosion inhibitor adopts one or two of cellulose and mercaptobenzothiazole, and the defoaming agent is an organic silicon type defoaming agent.
2. The low conductivity automotive fuel cell antifreeze coolant of claim 1, wherein: the cellulose is one or more of methylcellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose and hydroxymethyl cellulose; hydroxypropyl methylcellulose is preferably used.
3. The low conductivity automotive fuel cell antifreeze coolant of claim 1, wherein: the mercaptobenzothiazole is one or two of 2-mercaptobenzothiazole or 6-amino-2-mercaptobenzothiazole, and preferably 6-amino-2-mercaptobenzothiazole.
4. The low conductivity automotive fuel cell antifreeze coolant of claim 1, wherein: the organic silicon type defoaming agent adopts one or more of polyether modified silicone oil, polydimethylsiloxane and amino polyether modified silicone oil; it is preferable to use an aminopolyether-modified silicone oil.
5. The low conductivity automotive fuel cell antifreeze coolant of claim 1, wherein: the mass ratio of the cellulose to the mercaptobenzothiazole is in the range of 2: (0.5-0.9).
6. The low conductivity automotive fuel cell antifreeze coolant of claim 5, wherein: the paint is prepared from the following components in percentage by weight:
40% -60% of ethylene glycol;
0.2 to 0.3 percent of cellulose;
mercaptobenzothiazole 0.13-0.23%;
0.008% -0.012% of defoaming agent;
0.2 to 0.25 percent of surfactant;
the balance is deionized water with the conductivity of less than 0.5 mu s/cm, and the sum of the weight percentages of the components of the antifreeze coolant is 100 percent.
7. The production method of the low-conductivity automotive fuel cell antifreeze coolant according to any one of claims 1 to 6, characterized in that: the method comprises the following steps: calculating the addition of each component according to the weight percentage of the components of the anti-freezing cooling liquid, adding ethylene glycol and deionized water with the conductivity lower than 0.5 mu s/cm into a reaction vessel according to the calculation result, stirring, and then sequentially adding an organic corrosion inhibitor, a defoaming agent and a surfactant for mixing so as to ensure that the anti-freezing cooling liquid comprises the following components in percentage by weight: 30 to 70 percent of ethylene glycol, 0.15 to 0.5 percent of organic corrosion inhibitor, 0.005 to 0.015 percent of defoaming agent, 0.15 to 0.3 percent of surfactant and the balance of deionized water with the conductivity of less than 0.5 mu s/cm, and all the components are added and then continuously stirred for 70 to 100 minutes at room temperature.
8. The method for producing the antifreeze coolant for the low-conductivity automotive fuel cell according to claim 7, wherein: adding one of the organic corrosion inhibitor and the defoaming agent into a reaction container, stirring for 10-15 minutes at normal temperature, and then adding the next component.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117447973A (en) * | 2023-12-22 | 2024-01-26 | 纯牌科技股份有限公司 | Cooling liquid for electric automobile and preparation method thereof |
| CN117467416A (en) * | 2023-12-26 | 2024-01-30 | 纯牌科技股份有限公司 | Organic motor vehicle cooling liquid and preparation method thereof |
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