A bactericidal corrosion inhibitor composition, bactericidal corrosion inhibitor and coolant

Abstract

This invention relates to the field of corrosion inhibitors for data center coolants, specifically a bactericidal and corrosion-inhibiting composition, a bactericidal and corrosion-inhibiting agent, and a coolant. The bactericidal and corrosion-inhibiting composition provided by this invention comprises a brominated organic component and a polyquaternary ammonium salt component. The brominated organic component includes one or more of brominated benzotriazole compounds, brominated imidazole compounds, and brominated imidazoleline compounds. The mass ratio of the brominated organic component to the polyquaternary ammonium salt component is (2~5):(2~5). The bactericidal and corrosion-inhibiting composition provided by this invention has a corrosion-inhibiting effect and can also slow down the degradation rate of bactericidal groups, achieving a long-term bactericidal effect. Moreover, when applied to coolants, after killing bacteria, the residual adsorbent active ingredients do not significantly affect the corrosion-inhibiting performance of the coolant, solving the problem of easy bacterial growth in water-based coolants in the prior art, ensuring a long-term bactericidal and bacteriostatic effect, and also having good compatibility with existing water-based coolant formulations.

Description

Technical Field

[0001] This invention relates to the field of coolant corrosion inhibitors, specifically a bactericidal and corrosion-inhibiting composition, a bactericidal and corrosion-inhibiting agent, and a coolant. Background Technology

[0002] Currently, most coolants use water-based or glycerol-based base fluids. However, due to the reduced toxicity of the base fluid, bacterial growth has become a problem. When the number of bacteria is too high, biological slime can be generated and adhere to the inner wall of the pipes, seriously affecting the heat exchange efficiency of the system.

[0003] Traditional bactericides are valued for their rapid degradation, quick action, and lack of environmental pollution. However, in closed-loop systems with working fluids, such as data center liquid cooling systems or circulating water treatment systems, the rapid degradation of traditional bactericides makes them unable to meet the long-term antibacterial requirements of refrigerants in closed-loop systems.

[0004] Currently, for closed-loop systems operating with a working fluid, especially data center liquid cooling systems, the conditions for long-lasting bactericides are: ① the bactericide's structure remains unchanged before and after sterilization; ② the bactericide, when added to the liquid cooling fluid, does not affect the fluid's performance. Therefore, there is an urgent need to develop a suitable bactericide that can be combined with existing corrosion inhibitors in the coolant to reduce the bactericide's impact on the system, while simultaneously enhancing its stability and slowing its degradation rate. However, current traditional bactericides each have their own shortcomings and cannot fully meet the requirements of closed-loop systems operating with a working fluid. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a bactericidal and corrosion-inhibiting composition, a bactericidal and corrosion-inhibiting agent, and a coolant. The bactericidal and corrosion-inhibiting composition provided by the present invention not only has a corrosion-inhibiting effect, but also slows down the degradation rate of bactericidal groups, thereby achieving a long-term bactericidal effect. Moreover, when applied to a coolant, after killing bacteria, the residual substances are still common corrosion inhibitor components, and the residual adsorbent active ingredients will not have a significant impact on the corrosion-inhibiting performance of the coolant.

[0006] This invention provides a bactericidal and corrosion-inhibiting composition, comprising the following components:

[0007] The brominated organic component includes one or more of the following: bromobenzotriazole compounds, bromoimidazolium compounds, and bromoimidazoline compounds.

[0008] Polyquaternary ammonium salt components;

[0009] The mass ratio of the brominated organic component and the polyquaternary ammonium salt component in this invention is (2~5):(2~5), preferably (2~3):(2~3), more preferably (2~3):2, and even more preferably 2:2.

[0010] The brominated organic component in the bactericidal and corrosion-inhibiting composition of this invention has good permeability to cell walls. Considering the strong polluting properties of fluorine (F) and the strong corrosive properties of chloride (Cl) to metals, Br atoms were ultimately chosen as the bactericidal active group of this component. Furthermore, as an organic component, organic matter acts as a carrier and release vessel for halogens, resulting in higher stability and a longer-lasting bactericidal effect. Preferably, the brominated organic component includes one or more of bromobenzotriazole, 2-bromo-1H-imidazolium, 2-bromoimidazo[1,2-a]pyrazine, and bromoimidazoline.

[0011] The bromobenzotriazole in the bromoorganic component of this invention has the following structural formula: In the short term, the bactericidal mechanism of bromobenzotriazole itself is membrane active adsorption; after long-term use, bromobenzotriazole will release and generate benzotriazole derivatives, which are effective corrosion inhibitors for copper. They can combine with halogen atoms to carry and slowly release halogen atoms, and can still protect the metal as a corrosion inhibitor without affecting the corrosion inhibition performance of the coolant.

[0012] The 2-bromo-1H-imidazolium and 2-bromoimidazole[1,2-a]pyrazine in the brominated organic components of this invention are both bromoimidazole derivatives. Imidazole groups have good water solubility and can improve the solubility of drugs in water. Therefore, imidazolium can also be combined with halogen atoms to increase solubility. Simultaneously, imidazolium also has a certain corrosion inhibitory effect on metals. The 2-bromo-1H-imidazolium has the CAS number 16681-56-4 and the structural formula is as follows: The CAS number of the 2-bromoimidazolo[1,2-a]pyrazine is 912773-24-1, and its structural formula is... .

[0013] The bromoimidazoline in the brominated organic component of this invention also possesses an imidazole group, and therefore also exhibits good water solubility, which can enhance the solubility of the drug in water. Therefore, it is also possible to combine imidazole with a halogen atom to further increase solubility. The bromoimidazoline of this invention has the CAS number 3304-74-3 and the structural formula is as follows: .

[0014] The polyquaternary ammonium salt component of this invention is a common commercially available dual long-chain quaternary ammonium salt, specifically including one or more of decyl dimethyl ammonium bromide or bis(dodecyl) dimethyl ammonium bromide (DDAB), wherein the structural formula of decyl dimethyl ammonium bromide is as follows: The structural formula of the didodecyldimethylammonium bromide is as follows: .

[0015] Preferably, the bactericidal and corrosion-inhibiting composition of the present invention comprises the following components: bromobenzotriazole and polyquaternary ammonium salt. Preferably, the bactericidal and corrosion-inhibiting composition of the present invention comprises the following components: a brominated organic component and a polyquaternary ammonium salt, wherein the brominated organic component includes one or more of 2-bromo-1H-imidazolium or 2-bromoimidazole[1,2-a]pyrazine. Preferably, the bactericidal and corrosion-inhibiting composition of the present invention comprises the following components: bromoimidazoline and polyquaternary ammonium salt.

[0016] In one embodiment of the present invention, the bactericidal and corrosion-inhibiting composition comprises the following components: bromobenzotriazole and diecryldimethylammonium bromide. In another embodiment of the present invention, the bactericidal and corrosion-inhibiting composition comprises the following components: 2-bromo-1H-imidazole and diecryldimethylammonium bromide. In yet another embodiment of the present invention, the bactericidal and corrosion-inhibiting composition comprises the following components: bromoimidazoline and diecryldimethylammonium bromide.

[0017] This invention provides a bactericidal and corrosion-inhibiting agent, which is the bactericidal and corrosion-inhibiting composition described in any of the above-mentioned technical solutions; or, it comprises an additive and the bactericidal and corrosion-inhibiting composition described in any of the above-mentioned technical solutions. This invention does not impose any particular limitation on the additive, which can be any additive conventionally applicable to the preparation of bactericidal and corrosion-inhibiting agents in the art.

[0018] This invention provides a coolant, comprising:

[0019] Water-based coolant and the bactericidal and corrosion-inhibiting composition described in any of the above technical solutions.

[0020] The coolant provided by this invention, through the action of the above-mentioned bactericidal and corrosion-inhibiting composition, can not only maintain a low number of bacteria for a long time, but also has good compatibility with the water-based coolant and the above-mentioned bactericidal and corrosion-inhibiting composition. After killing bacteria, the residual adsorbent active ingredients will not have a significant impact on the corrosion inhibition performance of the coolant.

[0021] The water-based coolant comprises: 0.8-1.5 wt% sebacic acid; 0.2-0.8 wt% methylbenzotriazole; 0.2-0.8 wt% hexanoic acid; 0.2-0.8 wt% imidazole; 0.1-0.5 wt% pH adjuster; 0-0.08 wt% defoamer; with the balance being water. Preferably, the water-based coolant comprises: 0.8-1.5 wt% sebacic acid; 0.2-0.8 wt% methylbenzotriazole; 0.2-0.8 wt% hexanoic acid; 0.2-0.8 wt% imidazole; 0.1-0.5 wt% pH adjuster; 0.02-0.08 wt% polyether defoamer; with the balance being water. The dosage of the bactericide and corrosion inhibitor is 40 ppm to 100 ppm.

[0022] The coolant provided by this invention is obtained by mixing the above-mentioned water-based coolant and the bactericidal and corrosion-inhibiting composition described in any of the above technical solutions. Specifically, the water-based coolant, the brominated organic component, and the polyquaternary ammonium salt component are mixed and stirred until the resulting mixed solution is uniform and transparent, and then filtered to obtain the above-mentioned coolant; wherein, the amount of the brominated organic component is 20 ppm to 50 ppm, preferably 20 ppm to 30 ppm, more preferably 20 ppm; the amount of the polyquaternary ammonium salt component is 20 ppm to 50 ppm, preferably 20 ppm to 30 ppm, more preferably 20 ppm; the mixing and stirring time is at least 30 min, preferably 30 min to 90 min.

[0023] This invention also provides the application of the above-mentioned coolant as a corrosion-inhibiting and antibacterial coolant in bacterial water samples from data centers. Specifically, the coolant is added to the bacterial water samples from data centers, and the concentration of the coolant in the bacterial water samples from data centers is 20 mg / L to 40 mg / L. In some embodiments of this invention, the bacterial water samples from data centers contain various common bacterial species, including sulfate-reducing bacteria and bacilli.

[0024] This invention provides a bactericidal and corrosion-inhibiting composition, a bactericidal and corrosion-inhibiting agent, and a coolant. The bactericidal and corrosion-inhibiting composition provided by this invention comprises a brominated organic component and a polyquaternary ammonium salt component. The brominated organic component includes one or more of brominated benzotriazole compounds, brominated imidazolium compounds, and brominated imidazoline compounds. The mass ratio of the brominated organic component to the polyquaternary ammonium salt component is (2~5):(2~5). The bactericidal and corrosion-inhibiting composition provided by this invention not only has a corrosion-inhibiting effect but also slows down the degradation rate of bactericidal groups, achieving a long-term bactericidal effect. Furthermore, when applied to a coolant, after killing bacteria, the residual adsorbent active ingredients do not significantly affect the corrosion-inhibiting performance of the coolant, solving the problem of easy bacterial growth in water-based coolants in the prior art, ensuring a long-term bactericidal and bacteriostatic effect, and also showing good compatibility with existing water-based coolant formulations. Experiments show that although the bactericidal and corrosion-inhibiting composition provided by this invention has a lower bactericidal efficiency than traditional bactericides in the short term, its bactericidal long-term effect is significantly better than that of traditional isothiazolinone and polyquaternary ammonium salt bactericides in longer-term tests. Furthermore, tests were conducted on C1100 copper and 6063 aluminum alloys, and the corrosion inhibition efficiency was compared with that of water-based coolant without bactericide, with a change of <5%. Detailed Implementation

[0025] This invention discloses a bactericidal and corrosion-inhibiting composition, a bactericidal and corrosion-inhibiting agent, and a coolant. Those skilled in the art can refer to the content of this document and appropriately modify the process parameters to achieve the desired results. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments, and those skilled in the art can obviously make modifications or appropriate alterations and combinations to the methods and applications described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.

[0026] The present invention will be further described below with reference to the embodiments:

[0027] Example 1

[0028] 1. Coolant Preparation: In a reactor, sequentially add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer, with the remainder being deionized water. Stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent, then filter to obtain the self-prepared water-based coolant. Add bromobenzotriazole and disdecyldimethylammonium bromide to the obtained self-prepared water-based coolant, stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent, then filter to obtain the coolant.

[0029] Coolants containing varying amounts of bromobenzotriazole and diecryldimethylammonium bromide were prepared according to the steps described above, as follows:

[0030] 20 ppm of bromobenzotriazole and 20 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant A of Example 1;

[0031] 30 ppm of bromobenzotriazole and 30 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant B of Example 1;

[0032] 40 ppm of bromobenzotriazole and 40 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant C of Example 1;

[0033] 50 ppm of bromobenzotriazole and 50 ppm of dicedyldimethylammonium bromide were added to obtain the coolant D of Example 1.

[0034] 2. Sterilization performance verification: The specific test conditions and test results are shown in Test Example 1. Although the sterilization efficiency is lower than that of traditional bactericides in the short term, in the test over a longer period of time, the bactericidal long-term effect of water-based coolant with bactericidal corrosion inhibitor is significantly better than that of traditional isothiazolinone and polyquaternary ammonium salt bactericides.

[0035] 3. Corrosion Inhibition Performance Verification: The Tafel corrosion current extrapolation method in electrochemical methods was used to calculate the corrosion inhibition efficiency of the examples. Specific test conditions, calculation formulas, and results are shown in Experimental Example 1. Tests were conducted on C1100 copper and 6063 aluminum alloy, and the corrosion inhibition efficiency was compared with that of the bactericide-free water-based coolant in Comparative Example 3, with a change of <5%.

[0036] Example 2

[0037] 1. Coolant Preparation: In a reaction vessel, add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer, with the remainder being deionized water. Stir in the reaction vessel for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the self-prepared water-based coolant. Add 2-bromo-1H-imidazolium and discedryldimethylammonium bromide to the obtained self-prepared water-based coolant. Stir in the reaction vessel for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the final coolant.

[0038] Cooling solutions containing varying amounts of 2-bromo-1H-imidazolium and decyldimethylammonium bromide were prepared according to the steps described above, as follows:

[0039] 20 ppm of 2-bromo-1H-imidazolium and 20 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant A of Example 2;

[0040] 30 ppm of 2-bromo-1H-imidazolium and 30 ppm of bisdecyldimethylammonium bromide were added respectively to obtain the coolant B of Example 2;

[0041] 40 ppm of 2-bromo-1H-imidazolium and 40 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant C of Example 2;

[0042] 50 ppm of 2-bromo-1H-imidazolium and 50 ppm of bisdecyldimethylammonium bromide were added to obtain the coolant D of Example 2.

[0043] 2. Sterilization performance verification: The specific test conditions and test results are shown in Test Example 1. Although the sterilization efficiency is lower than that of traditional bactericides in the short term, in the test over a longer period of time, the bactericidal long-term effect of water-based coolant with bactericidal corrosion inhibitor is significantly better than that of traditional isothiazolinone and polyquaternary ammonium salt bactericides.

[0044] 3. Corrosion Inhibition Performance Verification: The Tafel corrosion current extrapolation method in electrochemical methods was used to calculate the corrosion inhibition efficiency of the examples. Specific test conditions, calculation formulas, and results are shown in Experimental Example 1. Tests were conducted on C1100 copper and 6063 aluminum alloy, and the corrosion inhibition efficiency was compared with that of the bactericide-free water-based coolant in Comparative Example 3, with a change of <10%.

[0045] Example 3

[0046] 1. Coolant Preparation: In a reactor, sequentially add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer, with the remainder being deionized water. Stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the self-prepared water-based coolant. Add bromoimidazoline and disdecyldimethylammonium bromide to the obtained self-prepared water-based coolant. Stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the final coolant.

[0047] Coolants containing different total amounts of bromoimidazoline and decyldimethylammonium bromide were prepared according to the steps described above, as follows:

[0048] 20 ppm of bromoimidazoline and 20 ppm of bisdecyldimethylammonium bromide were added respectively to obtain the coolant A of Example 3;

[0049] Add 30 ppm of bromoimidazoline and 30 ppm of bisdecyldimethylammonium bromide respectively to obtain the coolant B of Example 3;

[0050] 40 ppm of bromoimidazoline and 40 ppm of bisdecyldimethylammonium bromide were added respectively to obtain the coolant C of Example 3;

[0051] 50 ppm of bromoimidazoline and 50 ppm of dicedyldimethylammonium bromide were added to obtain the coolant D of Example 3.

[0052] 2. Sterilization performance verification: The specific test conditions and test results are shown in Test Example 1. Although the sterilization efficiency is lower than that of traditional bactericides in the short term, in the test over a longer period of time, the bactericidal long-term effect of water-based coolant with bactericidal corrosion inhibitor is significantly better than that of traditional isothiazolinone and polyquaternary ammonium salt bactericides.

[0053] 3. Corrosion Inhibition Performance Verification: The Tafel corrosion current extrapolation method in electrochemical methods was used to calculate the corrosion inhibition efficiency of the examples. Specific test conditions, calculation formulas, and results are shown in Experimental Example 1. Tests were conducted on C1100 copper and 6063 aluminum alloy, and the corrosion inhibition efficiency was compared with that of the bactericide-free water-based coolant in Comparative Example 3, with a change of <10%.

[0054] Comparative Example 1

[0055] 1. Coolant Preparation: In a reactor, sequentially add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer, with the remainder being deionized water. Stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the self-prepared water-based coolant. Add isothiazolinone to the obtained self-prepared water-based coolant and stir in the reactor for at least 30 minutes until the solution becomes uniform and transparent. Filter to obtain the final coolant.

[0056] Coolants containing different amounts of isothiazolinone were prepared according to the steps described above, as follows:

[0057] Add 20 ppm isothiazolinone to obtain coolant A of Comparative Example 1;

[0058] Add 30 ppm isothiazolinone to obtain coolant B of Comparative Example 1;

[0059] Add 40 ppm isothiazolinone to obtain coolant C of Comparative Example 1;

[0060] Add 50 ppm of isothiazolinone to obtain coolant D, which is the equivalent of Comparative Example 1.

[0061] 2. Sterilization performance verification: The specific test conditions and test results are shown in Experiment Example 1.

[0062] 3. Corrosion inhibition performance verification: The corrosion inhibition efficiency of the examples was calculated using the Tafel corrosion current extrapolation method in electrochemical methods. The specific test conditions, calculation formulas and results are shown in Experiment Example 1.

[0063] Comparative Example 2

[0064] 1. Coolant Preparation: In a reactor, sequentially add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer, with the remainder being deionized water. Stir in the reactor for at least 30 minutes until the solution becomes uniformly transparent, then filter to obtain the self-prepared water-based coolant. Add disacyldimethylammonium bromide to the obtained self-prepared water-based coolant, stir in the reactor for at least 30 minutes until the solution becomes uniformly transparent, then filter to obtain the final coolant.

[0065] Coolants containing different amounts of diecryldimethylammonium bromide were prepared according to the steps described above, as follows:

[0066] Adding 20 ppm of disedecyldimethylammonium bromide yielded coolant A in Comparative Example 2;

[0067] Adding 30 ppm of disedecyldimethylammonium bromide yielded coolant B in Comparative Example 2;

[0068] Adding 40 ppm of disedecyldimethylammonium bromide yielded coolant C for Comparative Example 2;

[0069] Adding 50 ppm of disedecyldimethylammonium bromide yields coolant D, which is the equivalent of Comparative Example 2.

[0070] 2. Sterilization performance verification: The specific test conditions and test results are shown in Experiment Example 1.

[0071] 3. Corrosion inhibition performance verification: The corrosion inhibition efficiency of the examples was calculated using the Tafel corrosion current extrapolation method in electrochemical methods. The specific test conditions, calculation formulas and results are shown in Experiment Example 1.

[0072] Comparative Example 3

[0073] 1. Coolant preparation: Add 1.2 wt% sebacic acid, 0.5 wt% methylbenzotriazole, 0.5 wt% hexanoic acid, 0.5 wt% imidazole, 0.3 wt% pH adjuster, and 0.05 wt% polyether defoamer to the reactor in sequence, with the remainder being deionized water. Stir in the reactor for at least 30 minutes until the solution is uniform and transparent, then filter to obtain the final coolant.

[0074] 2. Sterilization performance verification: The specific test conditions and test results are shown in Experiment Example 1.

[0075] 3. Corrosion inhibition performance verification: The corrosion inhibition efficiency of the examples was calculated using the Tafel corrosion current extrapolation method in electrochemical methods. The specific test conditions, calculation formulas and results are shown in Experiment Example 1.

[0076] Experimental Example 1

[0077] The bactericidal performance test was conducted according to method 6.4.2 of the standard "DL / T 1116-2009 Performance of Bactericides for Circulating Cooling Water", as follows:

[0078] Experimental materials: Water samples from a data center for bacterial testing, containing various common bacterial species (including sulfate-reducing bacteria, bacilli, etc.), with an initial total bacterial colony count of 1.5 × 10⁻⁶. 7 per mL.

[0079] Evaluation method: Add the coolant A of Examples 1-3 and Comparative Examples 1-2 to 150 mL of test water sample. Place the water sample after dosing and the blank water sample into a biochemical shaker for constant temperature incubation. Take 1 mL of water sample at each specified test time and count the bacteria using 3M bacterial tablets. Finally, add 1 mL of field bacterial water sample to keep the total water sample volume constant at 100 mL, and introduce new bacteria at the same time.

[0080] Experimental temperature: 35℃.

[0081] Test duration: 3 h, 24 h, 72 h, 168 h, 336 h.

[0082] Coolant concentration: 30 mg / L.

[0083] The results of the sterilization test are shown in Table 1:

[0084] Table 1

[0085]

[0086] Add the coolant obtained from the example and comparative example to 150 mL of the same test water sample as above. The coolant concentration in the test water sample is 30 mg / L. Test the corrosion inhibition performance of C1100 copper and 6063 aluminum alloy.

[0087] The corrosion inhibition performance was tested using the "Tafel polarization curve" method in electrochemical testing. The specific test parameters are as follows:

[0088] ① Scanning potential range: Open circuit potential ±300 mV

[0089] ② Scan rate: 1 mV / s

[0090] The final test result is the corrosion current icorr, and the corrosion inhibition rate is calculated using a formula.

[0091] Corrosion inhibition efficiency calculation formula = (Corrosion current of blank pure water - Corrosion current of the coolant under test) / Corrosion current of blank pure water × 100%

[0092] The test results of the corrosion inhibition performance of C1100 copper are shown in Table 2:

[0093] Table 2

[0094]

[0095] The corrosion inhibition performance test results of 6063 aluminum alloy are shown in Table 3:

[0096] Table 3

[0097]

[0098] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bactericidal and corrosion-inhibiting composition, characterized in that, It consists of the following components: The brominated organic component includes one or more of the following: bromobenzotriazole compounds, bromoimidazolium compounds, and bromoimidazoline compounds. Polyquaternary ammonium salt components; The mass ratio of the brominated organic component to the polyquaternary ammonium salt component is (2~5):(2~5).

2. The bactericidal and corrosion-inhibiting composition according to claim 1, characterized in that, The brominated organic components include one or more of bromobenzotriazole, 2-bromo-1H-imidazolium, 2-bromoimidazole[1,2-a]pyrazine, and bromoimidazolinium.

3. The bactericidal and corrosion-inhibiting composition according to claim 1, characterized in that, The polyquaternary ammonium salt component includes one or more of decyl dimethyl ammonium bromide or dodecyl dimethyl ammonium bromide.

4. The bactericidal and corrosion-inhibiting composition according to claim 1, characterized in that, The mass ratio of the brominated organic component to the polyquaternary ammonium salt component is (2~3):(2~3).

5. The bactericidal and corrosion-inhibiting composition according to any one of claims 1 to 4, characterized in that, It consists of the following components: Bromobenzotriazole and polyquaternium salts; Alternatively, it may consist of the following components: Brominated organic components and polyquaternary ammonium salts, wherein the brominated organic components include one or more of 2-bromo-1H-imidazolium or 2-bromoimidazo[1,2-a]pyrazine; Alternatively, it may consist of the following components: Bromoimidazoline and polyquaternium salts.

6. The bactericidal and corrosion-inhibiting composition according to claim 5, characterized in that, It consists of the following components: Bromobenzotriazole and bisdecyldimethylammonium bromide; Alternatively, it may consist of the following components: 2-Bromo-1H-imidazolium and bisdecyldimethylammonium bromide; Alternatively, it may consist of the following components: Bromoimidazoline and bisdecyldimethylammonium bromide.

7. A bactericidal and corrosion-inhibiting agent, characterized in that, It is the bactericidal and corrosion-inhibiting composition according to any one of claims 1 to 6; or, It includes additives and the bactericidal and corrosion-inhibiting composition according to any one of claims 1 to 6.

8. A coolant, characterized in that, include: Water-based coolant and the bactericidal and corrosion-inhibiting composition according to any one of claims 1 to 6.

9. The coolant according to claim 8, characterized in that, The water-based coolant includes: 0.8~1.5 wt% sebacic acid; 0.2~0.8 wt% methylbenzotriazole; 0.2~0.8 wt% hexanoic acid; 0.2~0.8 wt% imidazole; pH adjuster of 0.1 wt% to 0.5 wt%; 0~0.08 wt% defoamer; The remainder is water.

10. The coolant according to claim 8, characterized in that, The amount of the bactericidal and corrosion-inhibiting composition is 40 ppm to 100 ppm.

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