Circulating cooling water treatment agent for inhibiting microbial corrosion and preparation method thereof

Abstract

The invention discloses a treatment agent for inhibiting microorganisms in circulating cooling water from corroding a carbon steel pipeline and a use method of the treatment agent, and belongs to the technical field of circulating cooling water treatment agents. The treatment agent for inhibiting the corrosion of the carbon steel pipeline by the microorganisms in the circulating cooling water comprises a first treatment agent and a second treatment agent, and the first treatment agent comprises the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidizing agent and a first precipitator sodium sulfide; the second treatment agent comprises the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidizing agent and a second precipitator. According to the invention, an anti-microbial corrosion layer can be formed on the surface of the carbon steel pipeline, direct contact between the carbon steel pipeline and circulating cooling water is isolated, the carbon steel pipeline is protected, and corrosion of microorganisms in the circulating cooling water to the carbon steel pipeline is inhibited for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of circulating cooling water, and in particular to a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water and a preparation method thereof. Background Art

[0002] Circulating water systems are widely used in industrial production, heating and cooling, and other fields. However, due to the recycling of water, microorganisms are very likely to breed, leading to serious problems such as corrosion of pipelines and scaling of equipment. Therefore, inhibiting microbial corrosion of pipelines has become a key link in circulating water treatment. At present, the main technical routes for inhibiting microbial corrosion in circulating water systems at home and abroad include: Chemical sterilization method: using chemical agents such as oxidants and aldehydes to kill microorganisms in circulating water, but there is a risk of secondary pollution and corrosion of metal pipelines. Physical sterilization method: using physical means such as ultraviolet rays, ionizing radiation, and ultrasound to inactivate microorganisms, which can effectively sterilize without secondary pollution, but the investment cost is high and the effect on the formed biofilm is limited. Biological agent method: using probiotic strains with antibacterial or degradation capabilities to form antagonism in circulating water and inhibit the growth of harmful microorganisms is an environmentally friendly and efficient new method, but strain screening and preparation stability are still technical difficulties. Composite sterilization method: combining chemical agents with physical means or biological agents to play a synergistic role is a future development trend, but the optimization of composite processes and cost control are key.

[0003] In the circulating cooling water system, carbon steel is a metal material containing iron. Carbon steel equipment is mainly composed of iron and is prone to rust. Scale formation: The oxidation of iron can lead to an increase in the concentration of iron ions in the water. These iron ions may then react with carbonate and sulfate in the water to form insoluble iron salts, which are deposited on the surface of carbon steel pipes to form scale. Local battery formation: The biofilm formed by microorganisms on the surface of carbon steel pipes may form a concentration gradient inside and outside the membrane, leading to the formation of local batteries, which in turn accelerates the corrosion process of carbon steel pipes. Therefore, in the circulating cooling water system, carbon steel may face corrosion problems due to its iron-containing characteristics, and appropriate anti-corrosion measures need to be taken.

[0004] The above-mentioned methods for inhibiting microbial corrosion in circulating water systems are all aimed at sterilization. Although they can inhibit the corrosion of carbon steel pipes by microorganisms in circulating cooling water in the short term, since new circulating cooling water needs to be continuously added to the carbon steel pipes, microorganisms will still exist in the carbon steel pipes for a long time, which will inevitably continue to corrode the carbon steel pipes, and the service life of the carbon steel pipes will continue to decline, increasing maintenance costs. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a treatment agent for inhibiting microbial corrosion of carbon steel pipes in circulating cooling water. The treatment agent for inhibiting microbial corrosion of carbon steel pipes in circulating cooling water can form an anti-microbial corrosion layer on the surface of the carbon steel pipe, isolating the direct contact between the carbon steel pipe and the circulating cooling water, thereby protecting the carbon steel pipe and inhibiting the corrosion of the carbon steel pipe by microorganisms in the circulating cooling water for a long time.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water includes a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a first precipitant; the second treatment agent includes the following components: the sodium thiosulfate, the surfactant, the dithiothiomethane, the oxidant, and a second precipitant.

[0008] Furthermore, a third treatment agent is also included, and the third treatment agent includes the following components: tetraethoxysilane and a structure directing agent.

[0009] Furthermore, the oxidant is one of iodine, hydrogen peroxide, potassium ferrocyanide, N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS), which can be used as oxidants to promote the formation of disulfide bonds between cysteine ​​molecules.

[0010] Furthermore, the structure directing agent is polydimethylsiloxane.

[0011] Furthermore, the surfactant is a polyoxyethylene nonionic surfactant.

[0012] Furthermore, the first precipitant is sodium sulfide.

[0013] Furthermore, the second precipitating agent is formic acid.

[0014] The second object of the present invention is achieved by adopting the following technical solution:

[0015] The method for using a treatment agent for inhibiting microbial corrosion of carbon steel pipes in circulating cooling water comprises the following steps:

[0016] S1. First, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur micron particles; the carbon steel pipeline is immersed in the circulating cooling water, and the first treatment agent is prepared according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the first treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur micron particles, the sulfur micron particles form a coordination complex with the iron of the carbon steel pipeline, and the surface of the sulfur micron particles is covalently bonded to the dithiothiomethane by forming a disulfide bond;

[0017] S2. First, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur nanoparticles; the circulating cooling water in step S1 is replaced, and the carbon steel pipe is immersed in the circulating cooling water again, and the second treatment agent is prepared according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the second treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur nanoparticles, and the sulfur nanoparticles are covalently bonded to the dithiothioethane by forming the disulfide bonds, and the sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dithiothioethanes, so as to form a rough structure of sulfur micro-nano particles.

[0018] Further, S3, replacing the circulating cooling water in step S2, preparing the third treatment agent, and re-immersing the carbon steel pipe in the third treatment agent to first cause a sol reaction;

[0019] S4. The carbon steel pipe is taken out from the third treatment agent to cause a gel reaction, and the carbon steel pipe is washed with the circulating cooling water to form a hydrophobic layer on the surface of the carbon steel pipe.

[0020] The third object of the present invention is achieved by adopting the following technical solution:

[0021] A carbon steel pipeline for inhibiting microbial corrosion in circulating cooling water is obtained by using a treatment agent for inhibiting microbial corrosion in circulating cooling water.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water provided by the present invention comprises a first treatment agent and a second treatment agent. The first treatment agent is added to the circulating cooling water to hydrolyze the sodium thiosulfate to form the sulfur micron particles due to the diffusion effect. Then the second treatment agent is added to the circulating cooling water to hydrolyze the sodium thiosulfate to form the sulfur nanoparticles. Due to the diffusion effect, the sulfur micron particles in the circulating cooling water approach the metal / solution interface and are partially adsorbed on the surface to form coordinated covalent bonds through chemical adsorption, which not only effectively isolates the direct contact between the microorganisms in the circulating cooling water and the surface of the carbon steel pipeline, but also inhibits the anodic electrochemical reaction on the surface of the carbon steel pipeline, effectively protecting the carbon steel pipeline. The sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dithiothiocarboxyls, forming a rough structure of sulfur micro-nano particles and a hydrophobic structure, which reduces the adhesion of microorganisms in the circulating cooling water to the surface of the sulfur nanoparticles. The sulfur nanoparticles themselves also have an antibacterial effect, effectively inhibiting the corrosion of carbon steel pipelines by microorganisms in the circulating cooling water.

[0024] (2) The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water provided by the present invention also includes a third treatment agent, which includes the following components: TEOS (tetraethoxysilane) and a structure-directing agent polydimethylsiloxane (PDMS). When tetraethoxysilane reacts with water, a hydrolysis reaction will first occur to generate silanols (Si-OH), and then these silanols will undergo a condensation reaction to form Si-O-Si bonds, which will condense and cross-link themselves to form a gel network structure. The addition of the structure-directing agent PDMS to tetraethoxysilane can guide the gel network structure to generate a porous structure through a template effect, thereby increasing the pore size of the gel network structure. The gel network structure is hydrophobic, and the increase in the pore size of the gel network structure enables the microorganisms in the circulating cooling water to contact the sulfur nanoparticles through the through holes, thereby improving the antibacterial properties of the gel network structure. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] CAS number of dithiothioethane: 624-92-0, chemical formula: C2H6S2, purchased from Shaanxi Didu Pharmaceutical Chemical Co., Ltd.

[0027] Iodine, hydrogen peroxide, potassium ferrocyanide, N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS), TEOS (tetraethoxysilane), and structure-directing agent PDMS were provided by Sinopharm Chemical Reagent Co., Ltd.

[0028] Example 1

[0029] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, including a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant hydrogen peroxide, and a first precipitant sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant hydrogen peroxide, and a second precipitant formic acid.

[0030] Heteroatoms such as S in sulfur micron particles with lone pairs of electrons can fill unoccupied 3d orbitals outside Fe atoms, resulting in the formation of coordination bonds between S atoms and iron atoms, which inhibits corrosion on the surface of carbon steel pipelines. Specifically, due to the diffusion effect, sulfur micron particles in the circulating cooling water approach the metal / solution interface, partially adsorb on the surface, and form coordinated covalent bonds through chemical adsorption, which not only effectively isolates the direct contact between microorganisms in the circulating cooling water and the surface of the carbon steel pipeline, but also inhibits the anodic electrochemical reaction on the surface of the carbon steel pipeline, effectively protecting the carbon steel pipeline.

[0031] In the embodiment, the oxidant is one of iodine, hydrogen peroxide, potassium ferrocyanide, N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS), which can be used as oxidants to promote the formation of disulfide bonds between cysteine ​​molecules.

[0032] In the embodiment, the surfactant is a polyoxyethylene nonionic surfactant, such as Tween 20, Tween 40, Tween 60, and Tween 80, which increases the solubility of dithiothiomethane in circulating cooling water and utilizes the colloid formed by dithiothiomethane in water to make the two thiol groups of dithiothiomethane more easily bonded to sulfur microparticles and sulfur nanoparticles to form disulfide bonds.

[0033] When preparing sulfur microparticles and sulfur nanoparticles, the choice of precipitant has an important influence on the size, morphology and dispersibility of the particles. Different precipitants may lead to different precipitation effects.

[0034] Precipitants for sulfur micron particles are usually selected from chemicals that promote the formation of larger particles. For example, sulfur micron particles can be generated under appropriate conditions by selecting sodium thiosulfate solution as the sulfur source. Precipitants for sulfur nanoparticles focus more on controlling the size and morphology of the particles. Formic acid is often used as a precipitant because it can generate sulfur nanoparticles of uniform size. Sulfur nanoparticles can be synthesized at room temperature, pressure, and liquid phase conditions with a particle size range of 50 to 80 nm. Sodium thiosulfate decomposes under acidic conditions to produce sulfur (S), sulfur dioxide (SO2), and water (H2O). The reducing agent sodium sulfide is added to reduce the sulfur source precursor to produce solid sulfur.

[0035] In this embodiment, the first precipitant is sodium sulfide, which induces the precipitation of sulfur nanoparticles; in this embodiment, the second precipitant is formic acid, which induces the precipitation and growth of sulfur nanoparticles on the surface of sulfur micron particles.

[0036] The present embodiment also provides a method for using a treatment agent for inhibiting microbial corrosion of a carbon steel pipeline in circulating cooling water, comprising the following steps: S1, firstly, according to the volume of the circulating cooling water, conducting an experiment to determine in advance the amount of the sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur micron particles; immersing the carbon steel pipeline in the circulating cooling water, and according to the amount of the sodium thiosulfate added to the circulating cooling water, preparing the first treatment agent, and then adding the first treatment agent to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur micron particles, the sulfur micron particles and the iron of the carbon steel pipeline form a coordination complex, and the surface of the sulfur micron particles is covalently bonded to the dithiothiomethane by forming a disulfide bond;

[0037] S2, firstly, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur nanoparticles; the circulating cooling water in step S1 is replaced, and the carbon steel pipeline is immersed in the circulating cooling water again, and the second treatment agent is configured according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the second treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur nanoparticles, and the sulfur nanoparticles are covalently bonded to the dithiothiomethane by forming the disulfide bond, and the sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles through the disulfide bond formed between the dithiothiomethanes, forming a rough structure of sulfur micro-nano particles. The rough structure of sulfur micro-nano particles forms a hydrophobic structure, which reduces the adhesion of microorganisms in the circulating cooling water to the surface of the sulfur nanoparticles, and the sulfur nanoparticles themselves also have an antibacterial effect, which effectively inhibits the corrosion of carbon steel pipelines by microorganisms in the circulating cooling water. The antimicrobial activity of sulfur nanoparticles does not solely depend on the generation of reactive oxygen species (ROS) or the interaction of the nanostructures with the cell wall, but rather on the enzymatic degradation of sulfur within bacterial cells to form products that are toxic to the bacteria.

[0038] Studies have shown that micrometer-scale roughness may confine bacteria to deep valleys and protect them from fluid shear forces, while nanometer-scale roughness surfaces are recognized to have better anti-adhesion properties, and smooth surfaces are suitable for the movement of attached bacteria and can increase the probability of bacterial adhesion.

[0039] Therefore, in terms of corrosion protection of carbon steel pipelines, in addition to the antibacterial effect, the rough structure of sulfur micro-nano particles can also prevent corrosive media such as salt solutions from directly contacting the carbon steel pipeline matrix, thereby slowing down the corrosion process. The low adhesion of the rough surface of sulfur micro-nano particles makes it difficult for circulating cooling water to wet, which helps to remove corrosive media from the surface of carbon steel pipelines, further reducing the risk of corrosion.

[0040] This embodiment also provides a carbon steel pipeline for inhibiting microbial corrosion in circulating cooling water, which is obtained by using the method of using the treatment agent for inhibiting microbial corrosion of carbon steel pipeline in circulating cooling water.

[0041] Example 2

[0042] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, including a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant potassium ferrocyanide, and a first precipitant sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant potassium ferrocyanide, and a second precipitant formic acid.

[0043] Example 3

[0044] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, including a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidizing agent iodine, and a first precipitating agent sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidizing agent iodine, and a second precipitating agent formic acid.

[0045] Example 4

[0046] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, including a first treatment agent and a second treatment agent, wherein the first treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-bromosuccinimide, and a first precipitant sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-bromosuccinimide, and a second precipitant formic acid.

[0047] Example 5

[0048] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, including a first treatment agent and a second treatment agent, wherein the first treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-bromosuccinimide, and a first precipitant sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-bromosuccinimide, and a second precipitant formic acid.

[0049] Example 6

[0050] The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water provided in this embodiment includes a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-chlorosuccinimide, and a first precipitant sodium sulfide; the second treatment agent includes the following components: sodium thiosulfate, a surfactant, dimercaptomethane, an oxidant N-chlorosuccinimide, and a second precipitant formic acid.

[0051] The present embodiment also provides a method for using a treatment agent for inhibiting microbial corrosion of a carbon steel pipeline in circulating cooling water, comprising the following steps: S1, firstly, according to the volume of the circulating cooling water, conducting an experiment to determine in advance the amount of the sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur micron particles; immersing the carbon steel pipeline in the circulating cooling water, and according to the amount of the sodium thiosulfate added to the circulating cooling water, preparing the first treatment agent, and then adding the first treatment agent to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur micron particles, the sulfur micron particles and the iron of the carbon steel pipeline form a coordination complex, and the surface of the sulfur micron particles is covalently bonded to the dithiothiomethane by forming a disulfide bond;

[0052] S2, firstly, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur nanoparticles; the circulating cooling water in step S1 is replaced, and the carbon steel pipeline is immersed in the circulating cooling water again, and the second treatment agent is configured according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the second treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur nanoparticles, and the sulfur nanoparticles are covalently bonded to the dithiothiomethane by forming the disulfide bond, and the sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles through the disulfide bond formed between the dithiothiomethanes, forming a rough structure of sulfur micro-nano particles. The rough structure of sulfur micro-nano particles forms a hydrophobic structure, which reduces the adhesion of microorganisms in the circulating cooling water to the surface of the sulfur nanoparticles, and the sulfur nanoparticles themselves also have an antibacterial effect, which effectively inhibits the corrosion of carbon steel pipelines by microorganisms in the circulating cooling water.

[0053] S3, replacing the circulating cooling water in step S2, preparing the third treatment agent, and re-immersing the carbon steel pipe in the third treatment agent to cause a sol reaction first;

[0054] S4. The carbon steel pipe is taken out from the third treatment agent to cause a gel reaction, and the carbon steel pipe is washed with the circulating cooling water to form a hydrophobic layer on the surface of the carbon steel pipe.

[0055] This embodiment also includes a third processing agent, which includes the following components: tetraethoxysilane (TEOS) and structure-directing agent polydimethylsiloxane (PDMS).

[0056] Low-adhesion super-hydrophobic coatings can indeed provide corrosion protection to a certain extent due to their special surface properties. This coating constructs a micro-nano rough structure and modifies low surface energy substances, so that water or other liquids form a high contact angle and a low rolling angle on the coating surface, thereby showing super-hydrophobicity. When the contact angle between the coating surface and water is greater than 150° and the rolling angle is less than 10°, the coating can be regarded as a super-hydrophobic coating.

[0057] In this embodiment, the function of the structure directing agent polydimethylsiloxane (PDMS) is as follows:

[0058] Template effect: In the sol-gel method, PDMS can act as a structure-directing agent because its molecular chains can form a template in the gel network. When the silicon source (such as TEOS) in the sol undergoes hydrolysis and condensation reactions, the presence of PDMS can affect the microstructure of the gel, leading to the formation of pores.

[0059] Controlling pore size and porosity: The molecular chains of PDMS occupy a certain space in the gel, and when the gel dries and solidifies, pores are left in the areas where the PDMS molecular chains are located. The size and distribution of these pores can be adjusted by adjusting the concentration of PDMS. A higher PDMS content may result in larger pores, while a lower content may produce smaller pores.

[0060] Stability and compatibility: The introduction of PDMS can also improve the stability of the gel because it can reduce the interaction between silanol groups in the gel, thereby reducing the shrinkage and cracking of the gel.

[0061] Post-processing: After the gel has dried and cured, the PDMS is usually removed by heat treatment, leaving behind a porous structure.

[0062] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, characterized in that: It includes a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a first precipitant; the second treatment agent includes the following components: the sodium thiosulfate, the surfactant, dithiothiomethane, the oxidant, and a second precipitant.

2. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The invention also comprises a third treatment agent, wherein the third treatment agent comprises the following components: tetraethoxysilane and a structure directing agent.

3. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The oxidant is one of iodine, hydrogen peroxide, potassium ferrocyanide, N-bromosuccinimide or N-chlorosuccinimide.

4. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The structure directing agent is polydimethylsiloxane.

5. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The surfactant is a polyoxyethylene nonionic surfactant.

6. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The first precipitant is sodium sulfide.

7. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: The second precipitating agent is formic acid.

8. The method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. First, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur micron particles; the carbon steel pipeline is immersed in the circulating cooling water, and the first treatment agent is prepared according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the first treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur micron particles, the sulfur micron particles form a coordination complex with the iron of the carbon steel pipeline, and the surface of the sulfur micron particles is covalently bonded to the dithiothiomethane by forming a disulfide bond; S2. First, according to the volume of the circulating cooling water, an experiment is conducted to determine in advance the amount of the sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form sulfur nanoparticles; the circulating cooling water in step S1 is replaced, and the carbon steel pipe is immersed in the circulating cooling water again, and the second treatment agent is prepared according to the amount of the sodium thiosulfate added to the circulating cooling water, and then the second treatment agent is added to the circulating cooling water, so that the sodium thiosulfate is hydrolyzed to form the sulfur nanoparticles, and the sulfur nanoparticles are covalently bonded to the dithiothioethane by forming the disulfide bonds, and the sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dithiothioethanes, so as to form a rough structure of sulfur micro-nano particles.

9. The method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 8, characterized in that: S3, replacing the circulating cooling water in step S2, preparing the third treatment agent, and re-immersing the carbon steel pipe in the third treatment agent to cause a sol reaction first; S4. The carbon steel pipe is taken out from the third treatment agent to cause a gel reaction, and the carbon steel pipe is washed with the circulating cooling water to form a hydrophobic layer on the surface of the carbon steel pipe.

10. A carbon steel pipeline for inhibiting microbial corrosion in circulating cooling water, characterized in that: The method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water as described in any one of claims 8 to 9 is used to obtain the product.