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

Abstract

The present invention discloses a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water and a method for using the same, and belongs to the technical field of treatment agents for circulating cooling water. The treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water comprises a first treatment agent and a second treatment agent, wherein the first treatment agent comprises the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a first precipitant, sodium sulfide; the second treatment agent comprises the following components: sodium thiosulfate, a surfactant, dithiothiomethane, an oxidant, and a second precipitant. The present invention can form an anti-microbial corrosion layer on the surface of a carbon steel pipeline, isolate the direct contact between the carbon steel pipeline and the circulating cooling water, protect the carbon steel pipeline, and inhibit the corrosion of the carbon steel pipeline by microorganisms in the circulating cooling water for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating cooling water, 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, the recirculation of water can easily breed microorganisms, leading to serious problems such as pipe corrosion and equipment scaling. Therefore, inhibiting microbial corrosion in pipes has become a critical step in circulating water treatment. Currently, the main technical approaches for inhibiting microbial corrosion in circulating water systems, both domestically and internationally, include: Chemical sterilization: Using chemical agents such as oxidants and aldehydes to kill microorganisms in the circulating water, but this carries the risk of secondary contamination and corrosion of metal pipes. Physical sterilization: Using physical methods such as ultraviolet light, ionizing radiation, and ultrasound to inactivate microorganisms effectively eliminates secondary contamination, but the investment cost is high and the effect on established biofilms is limited. Biological agents: Using probiotic strains with antibacterial or biodegradative properties to create antagonistic effects in the circulating water, inhibiting the growth of harmful microorganisms, is a new, environmentally friendly and efficient approach. However, strain selection and formulation stability remain technical challenges. Combined sterilization: Combining chemical agents with physical methods or biological agents to achieve synergistic effects is a future trend, but optimizing the combined process and controlling costs are key.

[0003] In circulating cooling water systems, 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 carbonates and sulfates 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 circulating cooling water systems, carbon steel may face corrosion problems due to its iron-containing characteristics, and appropriate anti-corrosion measures need to be taken.

[0004] The above methods of 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, and will inevitably continue to corrode the carbon steel pipes. The service life of the carbon steel pipes continues to decline, and the maintenance cost increases. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a treatment agent that inhibits the corrosion of carbon steel pipes by microorganisms in circulating cooling water. This treatment agent can form an anti-microbial corrosion layer on the surface of carbon steel pipes, isolating the carbon steel pipes from direct contact with the circulating cooling water, thus protecting the carbon steel pipes and inhibiting the corrosion of carbon steel pipes by microorganisms in the circulating cooling water in the long term.

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

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

[0008] Furthermore, it also includes a third processing agent, which comprises the following components: tetraethoxysilane and a structure directing agent.

[0009] Furthermore, the oxidant is one of iodine, hydrogen peroxide, potassium ferricyanide, N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS), which can act 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 precipitant 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, based on the volume of the circulating cooling water, conduct an experiment to determine in advance the amount of sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur micron particles; immerse the carbon steel pipe in the circulating cooling water, prepare the first treatment agent according to the amount of sodium thiosulfate added to the circulating cooling water, and then add the first treatment agent to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur micron particles, the sulfur micron particles form a coordination complex with the iron of the carbon steel pipe, and the surface of the sulfur micron particles is covalently bonded to the dimercaptomethane through the formation of disulfide bonds;

[0017] S2. First, based on the volume of the circulating cooling water, conduct an experiment to determine in advance the amount of sodium thiosulfate to be added to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles; replace the circulating cooling water in step S1, and re-immerse the carbon steel pipe in the circulating cooling water. Based on the amount of sodium thiosulfate added to the circulating cooling water, prepare the second treatment agent, and then add the second treatment agent to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles. The sulfur nanoparticles are covalently bonded to the dimercaptomethane by forming disulfide bonds, and the sulfur nanoparticles are bonded to the surface of the sulfur nanoparticles by the disulfide bonds formed between the dimercaptomethane molecules, forming a rough structure of sulfur micro-nanoparticles.

[0018] Further, S3, the circulating cooling water in step S2 is replaced, the third treatment agent is prepared, and the carbon steel pipe is immersed in the third treatment agent again to first cause a sol reaction;

[0019] S4. The carbon steel pipe is taken out from the third treatment agent, a gel reaction occurs, 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 method for 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 pipes in circulating cooling water provided by the present invention includes 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. The second treatment agent is then 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. Coordinated covalent bonds are formed through chemical adsorption, which effectively isolates the direct contact between the microorganisms in the circulating cooling water and the carbon steel pipe surface and inhibits the anodic electrochemical reaction on the carbon steel pipe surface, effectively protecting the carbon steel pipe. The sulfur nanoparticles are bound to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dithiothiocarbamates, 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 pipes by microorganisms in the circulating cooling water.

[0024] (2) The treatment agent provided by the present invention for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water 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 a condensation reaction will occur between these silanols 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 has hydrophobicity, 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 performance of the gel network structure. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to specific embodiments. It should be noted that, without conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments.

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

[0027] Iodine, hydrogen peroxide, potassium ferricyanide, N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS), TEOS (tetraethoxysilane), and the 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 pipes in circulating cooling water, including a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, surfactant, dimercaptomethane, oxidant hydrogen peroxide, and first precipitant sodium sulfide. The second treatment agent includes the following components: sodium thiosulfate, surfactant, dimercaptomethane, oxidant hydrogen peroxide, and second precipitant formic acid.

[0030] The sulfur heteroatoms, such as S, in the sulfur microparticles with lone pairs of electrons can fill the unoccupied 3d orbitals of Fe atoms, leading to the formation of coordinate bonds between S atoms and iron atoms. This process inhibits corrosion on the surface of carbon steel pipes. Specifically, due to a diffusion effect, sulfur microparticles in the circulating cooling water approach the metal / solution interface and partially adsorb onto the surface. Through chemisorption, they form coordinate covalent bonds, effectively isolating microorganisms in the circulating cooling water from direct contact with the surface of the carbon steel pipes and inhibiting anodic electrochemical reactions on the surface of the carbon steel pipes, thus effectively protecting the carbon steel pipes.

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

[0032] In the embodiments, the surfactant is a polyoxyethylene nonionic surfactant, such as Tween20, Tween40, Tween 60, and Tween 80. Its function is to increase the solubility of dimercaptomethane in circulating cooling water, and to utilize the colloid formed by dimercaptomethane in water to make it easier for the two thiol groups of dimercaptomethane to bind to sulfur micron particles and sulfur nanoparticles to form disulfide bonds.

[0033] When preparing sulfur microparticles and sulfur nanoparticles, the choice of precipitant has a significant impact on the particle size, morphology, and dispersibility. Different precipitants may lead to different precipitation effects.

[0034] Precipitants for sulfur micron particles are usually selected from chemicals that can promote the formation of larger particles. For example, by selecting sodium thiosulfate solution as the sulfur source, sulfur micron particles can be generated under appropriate conditions. 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, normal 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, sodium sulfide, 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 microparticles.

[0036] This embodiment also provides a method for using a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, comprising the following steps: S1, first, conducting an experiment to determine in advance the amount of sodium thiosulfate to be added to the circulating cooling water based on the volume of 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, preparing a first treatment agent based on the amount of sodium thiosulfate added to the circulating cooling water, 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, wherein the sulfur micron particles form a coordination complex with the iron in the carbon steel pipeline, and the surfaces of the sulfur micron particles are covalently bonded to the dithiothiomethane through the formation of disulfide bonds;

[0037] S2. First, based on the volume of the circulating cooling water, conduct an experiment to determine the amount of sodium thiosulfate to be added to the circulating cooling water in advance, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles. Replace the circulating cooling water in step S1, and re-immerse the carbon steel pipe in the circulating cooling water. Based on the amount of sodium thiosulfate added to the circulating cooling water, prepare the second treatment agent, and then add the second treatment agent to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles. The sulfur nanoparticles are covalently bonded to dimercaptomethane through the formation of disulfide bonds. The sulfur nanoparticles are also bonded to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dimercaptomethane molecules, forming a rough structure of sulfur micro-nano particles. The rough structure of sulfur micro-nano particles forms a hydrophobic structure, reducing the adhesion of microorganisms in the circulating cooling water to the surface of the sulfur nanoparticles. The sulfur nanoparticles themselves also have antibacterial properties, effectively inhibiting the corrosion of the carbon steel pipe 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 micron-scale roughness may confine bacteria to deep valleys and protect them from fluid shear forces, while nanoscale roughness surfaces are recognized to have better anti-adhesion properties. 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 for carbon steel pipelines, in addition to its antibacterial properties, the rough structure of sulfur micro-nanoparticles can prevent corrosive media, such as saline solutions, from directly contacting the carbon steel pipeline matrix, thereby slowing the corrosion process. The low adhesion of the rough surface of sulfur micro-nanoparticles makes it difficult for circulating cooling water to wet it, which helps to remove corrosive media from the carbon steel pipeline surface, further reducing the risk of corrosion.

[0040] This embodiment also provides a carbon steel pipe that inhibits microbial corrosion in circulating cooling water, obtained by using the treatment agent for inhibiting microbial corrosion of carbon steel pipes in circulating cooling water.

[0041] Example 2

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

[0043] Example 3

[0044] This embodiment provides a treatment agent for inhibiting microbial corrosion of carbon steel pipes in circulating cooling water, including a first treatment agent and a second treatment agent. The first treatment agent includes the following components: sodium thiosulfate, surfactant, dimercaptomethane, oxidant iodine, and first precipitant sodium sulfide. The second treatment agent includes the following components: sodium thiosulfate, surfactant, dimercaptomethane, oxidant iodine, and second precipitant formic acid.

[0045] Example 4

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

[0049] Example 6

[0050] The treatment agent for inhibiting microbial corrosion of carbon steel pipes 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, surfactant, dimercaptomethane, oxidant N-chlorosuccinimide, and first precipitant sodium sulfide. The second treatment agent includes the following components: sodium thiosulfate, surfactant, dimercaptomethane, oxidant N-chlorosuccinimide, and second precipitant formic acid.

[0051] This embodiment also provides a method for using a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, comprising the following steps: S1, first, conducting an experiment to determine in advance the amount of sodium thiosulfate to be added to the circulating cooling water based on the volume of 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, preparing a first treatment agent based on the amount of sodium thiosulfate added to the circulating cooling water, 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, wherein the sulfur micron particles form a coordination complex with the iron in the carbon steel pipeline, and the surfaces of the sulfur micron particles are covalently bonded to the dithiothiomethane through the formation of disulfide bonds;

[0052] S2. First, based on the volume of the circulating cooling water, conduct an experiment to determine the amount of sodium thiosulfate to be added to the circulating cooling water in advance, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles. Replace the circulating cooling water in step S1, and re-immerse the carbon steel pipe in the circulating cooling water. Based on the amount of sodium thiosulfate added to the circulating cooling water, prepare the second treatment agent, and then add the second treatment agent to the circulating cooling water, so that the sodium thiosulfate hydrolyzes to form sulfur nanoparticles. The sulfur nanoparticles are covalently bonded to dimercaptomethane through the formation of disulfide bonds. The sulfur nanoparticles are also bonded to the surface of the sulfur nanoparticles through the disulfide bonds formed between the dimercaptomethane molecules, forming a rough structure of sulfur micro-nano particles. The rough structure of sulfur micro-nano particles forms a hydrophobic structure, reducing the adhesion of microorganisms in the circulating cooling water to the surface of the sulfur nanoparticles. The sulfur nanoparticles themselves also have antibacterial properties, effectively inhibiting the corrosion of the carbon steel pipe 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;

[0054] S4. The carbon steel pipe is taken out from the third treatment agent, a gel reaction occurs, 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 further includes a third processing agent, which includes the following components: tetraethoxysilane (TEOS) and structure-directing agent polydimethylsiloxane (PDMS).

[0056] Low-adhesion superhydrophobic coatings do indeed provide a certain degree of corrosion protection due to their unique surface properties. These coatings exhibit superhydrophobicity by constructing micro- and nano-rough structures and modifying them with low surface energy materials, resulting in high contact angles and low roll-off angles for water or other liquids on the coating surface. A coating can be considered superhydrophobic when the contact angle between the coating surface and water is greater than 150° and the roll-off angle is less than 10°.

[0057] In this embodiment, the structure-directing agent polydimethylsiloxane (PDMS) functions 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: PDMS molecular chains occupy a certain amount of space within the gel. When the gel dries and solidifies, pores are left in the areas where the PDMS molecular chains were located. The size and distribution of these pores can be adjusted by adjusting the PDMS concentration. 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 solidified, the PDMS is typically removed by heat treatment, leaving behind a porous structure.

[0062] The above 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 replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A method for using a treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water, characterized in that: 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, wherein 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; The first precipitant is sodium sulfide; The second precipitant is formic acid; The method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water comprises the following steps: 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.

2. The method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 1, characterized in that: Also included is a third treatment agent, the third treatment agent comprising the following components: tetraethoxysilane, a structure directing agent; 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.

3. The method for using 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 method for using the treatment agent for inhibiting microbial corrosion of carbon steel pipelines in circulating cooling water according to claim 2, characterized in that: The structure directing agent is polydimethylsiloxane.

5. The method for using 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. 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 1 to 5 is used to obtain the product.