CN112064033B - Method for cooperatively controlling metal corrosion caused by microorganisms and application thereof - Google Patents
Method for cooperatively controlling metal corrosion caused by microorganisms and application thereof Download PDFInfo
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- CN112064033B CN112064033B CN202010933802.3A CN202010933802A CN112064033B CN 112064033 B CN112064033 B CN 112064033B CN 202010933802 A CN202010933802 A CN 202010933802A CN 112064033 B CN112064033 B CN 112064033B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
Abstract
The invention belongs to the technical field of metal corrosion and protection, and particularly relates to a method for cooperatively controlling microorganisms to corrode metal and application thereof, in order to reduce the microbial corrosion effect of the metal, the method remarkably reduces the corrosion rate of the microorganisms to the metal and improves the corrosion inhibition efficiency of a corrosion inhibitor by utilizing the cooperative coupling effect of a physical magnetic field and the corrosion inhibitor; meanwhile, the synergistic coupling effect of the corrosion inhibitor and the magnetic field can be utilized, the dosage of the corrosion inhibitor is reduced on the premise of not changing the corrosion inhibition efficiency of the corrosion inhibitor, and the pollution of the corrosion inhibitor to the environment is reduced; the invention introduces the physical magnetic field and the corrosion inhibitor for the first time, obviously reduces the corrosion rate of the metal material through the synergistic effect of the physical magnetic field and the corrosion inhibitor, and has important application prospect in the field of corrosion and protection of metals such as oil and gas field industrial gathering pipelines, ocean engineering equipment and the like.
Description
Technical Field
The invention belongs to the technical field of metal corrosion and protection, and particularly relates to a method for cooperatively controlling microorganisms to corrode metal and application thereof.
Background
Carbon steel is a common pipe material for the oil and gas industry, but corrosion of pipes, including CO2Corrosion and microbial corrosion not only cause huge economic losses, but also can cause serious safety accidents. Because the produced water of the oil field contains a large amount of CO2Thus, oil field pipelines are ubiquitous with CO2And (4) corrosion phenomenon. If no mitigation measures are taken, the corrosion rate can reach 10 mm/year or more. In the presence of microorganisms, metal material corrosion is more serious, particularly local corrosion, which is one of the most main causes of service failure of equipment such as pipelines and the like. The microbial corrosion refers to a phenomenon in which corrosion of a metal material is accelerated directly by the life activities of microorganisms or indirectly by metabolites thereof, and is a dynamic process, and the corrosion mechanism thereof is extremely complicated. Statistics show that the economic loss caused by microbial corrosion accounts for about 20 percent of the total economic loss.
Corrosion of metallic materials is a worldwide problem, but economic losses of about 1/3 can be reduced if existing corrosion protection technologies can be utilized. The most common method for controlling microbial corrosion is to add a biocide to directly kill the microbes in the pipeline medium, thereby controlling microbial corrosion. On one hand, the large amount of bactericide is used to increase the load of the environment and bring about a lot of environmental problems, and on the other hand, the bactericide is effective to planktonic microorganisms but is difficult to kill microorganisms in the biological membrane. Microorganisms can generate drug resistance even if being in the environment of the bactericide for a long time, so that the sterilizing efficiency of the bactericide is remarkably reduced, and the effect of well controlling the microbial corrosion is difficult to achieve by simply utilizing the bactericide.
The corrosion inhibitor is generally applied to corrosion of control pipelines of oil and gas field systems, and the organic adsorption type corrosion inhibitor plays a role in inhibiting corrosion by forming a nano-scale adsorption film on the surface of a steel material. The organic corrosion inhibitor comprises amines, carboxylic acids, imidazoline and salts or derivatives thereof, and the corrosion inhibition efficiency of the corrosion inhibitor depends on the integrity and the durability of the adsorption film. If the corrosion inhibitor film is incomplete or the surface coverage is defective, on the one hand, the corrosion inhibition efficiency of the corrosion inhibitor is reduced, and on the other hand, local corrosion still occurs. Because of its high toxicity, the widespread use of corrosion inhibitors poses a great threat to the environment. In addition, the corrosion inhibitors are used in large amounts and are very expensive. Especially under the condition of existence of microorganisms, the defects of the corrosion inhibitor film are increased due to the formation of a biological film, and the corrosion inhibition efficiency is obviously reduced.
Therefore, in order to improve the corrosion resistance efficiency of the corrosion inhibitor or the bactericide and the corrosion-inhibiting bactericide, the corrosion inhibitor is necessary to be used in combination with other methods, so that the microbial corrosion rate is obviously reduced through the coupling synergistic effect, and the aim of controlling the microbial corrosion of the pipeline steel is fulfilled.
At present, the synergistic coupling of a plurality of corrosion inhibitors is adopted to improve the corrosion inhibition efficiency of the corrosion inhibitors, but the method still has low microbial corrosion efficiency and still has higher economic cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for cooperatively controlling the metal corrosion of microorganisms, which utilizes the cooperative coupling of a physical static magnetic field and a corrosion inhibitor (or a corrosion inhibition bactericide), obviously reduces the corrosion rate of the microorganisms to the metal and improves the corrosion inhibition efficiency of the corrosion inhibitor.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a method for synergistically controlling microorganisms to corrode metals, namely, a magnetic field and a corrosion inhibitor are utilized to synergistically reduce the corrosion action of microorganisms on metals.
According to the invention, the corrosion action of microorganisms on metal is synergistically reduced by utilizing the magnetic field and the corrosion inhibitor, and the physical magnetic field and the corrosion inhibitor are introduced at the same time, so that on one hand, the magnetic field and the corrosion inhibitor can influence the activity of the microorganisms to inhibit the formation of an adsorption biological film of the microorganisms on the surface of the metal material, on the other hand, the existence of the magnetic field can ensure the integrity of the adsorption film of the corrosion inhibitor on the surface of the material and reduce the defects of the adsorption film of the corrosion inhibitor, thereby playing a synergistic effect, remarkably reducing the metal corrosion rate of the microorganisms and achieving the purpose of controlling the microbial corrosion; has important application prospect in the field of corrosion and protection of metals such as oil-gas field industrial gathering pipelines, ocean engineering equipment and the like.
Preferably, the strength of the magnetic field is 10-200 mT. Further, the strength of the magnetic field is 76 mT.
Preferably, the concentration of the corrosion inhibitor is 50-200 mg/L. Further, the concentration of the corrosion inhibitor is 100 mg/L.
Preferably, the corrosion inhibitor includes, but is not limited to, imidazoline agents.
Preferably, the magnetic field includes, but is not limited to, a physical static magnetic field.
Preferably, the magnetic field is a static magnetic field consisting of magnets.
Preferably, the microorganism includes, but is not limited to, iron oxidizing bacteria.
Preferably, the metal includes, but is not limited to, carbon steel.
The invention also provides application of the method for cooperatively controlling the microbial corrosion of the metal in the field of metal corrosion and protection.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for cooperatively controlling microorganisms to corrode metal, which remarkably reduces the corrosion rate of the microorganisms to the metal and improves the corrosion inhibition efficiency of a corrosion inhibitor by utilizing the cooperative coupling effect of a physical magnetic field and the corrosion inhibitor; meanwhile, the synergistic coupling effect of the corrosion inhibitor and the magnetic field can be utilized, the dosage of the corrosion inhibitor is reduced on the premise of not changing the corrosion inhibition efficiency of the corrosion inhibitor, and the pollution of the corrosion inhibitor to the environment is reduced; the invention introduces the physical magnetic field and the corrosion inhibitor for the first time, obviously reduces the corrosion rate of the metal material through the synergistic effect of the physical magnetic field and the corrosion inhibitor, and has important application prospect in the field of corrosion and protection of metals such as oil and gas field industrial gathering pipelines, ocean engineering equipment and the like.
Drawings
FIG. 1 is a schematic structural diagram of a corrosion testing apparatus;
FIG. 2 is a graph showing the effect of corrosion inhibitors and combinations of corrosion inhibitors and magnetic fields on the bacterial load change of iron-oxidizing bacteria;
FIG. 3 is a graph of the corrosion loss due to iron-oxidizing bacteria after 21 days in the presence of a corrosion inhibitor, a magnetic field, and a coupling of the corrosion inhibitor and the magnetic field;
FIG. 4 is a graph of corrosion inhibition efficiency in the presence of a corrosion inhibitor, a magnetic field, and a coupling of the corrosion inhibitor and the magnetic field;
FIG. 5 is a diagram of the corrosion profile of iron-oxidizing bacteria on Q235 steel;
FIG. 6 is a corrosion topography of Q235 steel in the presence of coupling of iron-oxidizing bacteria and a corrosion inhibitor;
FIG. 7 is a diagram of the corrosion profile of Q235 steel in the presence of coupling of iron-oxidizing bacteria and a magnetic field;
FIG. 8 is a diagram of the corrosion morphology of Q235 steel in the presence of coupling of iron-oxidizing bacteria, a corrosion inhibitor and a magnetic field.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The experimental procedures in the following examples were carried out by conventional methods unless otherwise specified, and the test materials used in the following examples were commercially available by conventional methods unless otherwise specified.
Example 1 demonstration of the Effect of physical magnetic field and Corrosion inhibitor in synergistic control of microbial Corrosion
To verify that the physical magnetic field and the corrosion inhibitor can synergistically control the corrosive action of microorganisms, the following tests were performed:
(1) construction of in-situ corrosion testing device
The corrosion testing device shown in fig. 1 is set up, the corrosion testing device is arranged in the middle of a magnetic field, the whole corrosion experiment is carried out in the middle of the testing device, the strength of the magnetic field is controlled to be 76mT by adjusting the distance between magnets, and the magnetic induction line is parallel to the surface of a sample.
Q235 steel for observing corrosion effect is placed in the corrosion testing device, and the testing solution containing corrosive bacteria used in the testing process is oil field simulation water containing 10% Iron Oxidizing Bacteria (IOB) bacteria liquid. Wherein the culture medium for iron-oxidizing bacteria comprises 0.5g of (NH)4)2SO40.5g of NaNO30.2g of CaCl20.5g of K2HPO40.5g of MgSO4·7H2O, 10g of ferric ammonium citrate, pH 6.3. The chemical composition of the oil field simulation water is as follows: 2.9g NaHCO30.0375g of MgSO40.105g of CaCl27.3g of NaCl, 0.0007 of K2SO44.88g of Na2SO4. Test solutions high purity CO was introduced before the start of the experiment2The gas was allowed to flow for 1 hour.
(2) Microbiological corrosion test
The corrosion testing device is used for carrying out microbial corrosion testing, the magnetic field is removed during testing, oil field simulation water containing 10% of IOB bacterial liquid is added, and high-purity CO is introduced before the experiment2One hour, the microbial corrosion rate and corrosion morphology caused by IOB were examined.
(3) Microbial and Magnetic Field (MF) coexistence corrosion test
The corrosion testing device is used for carrying out microorganism and magnetic field coexistence corrosion testing, oil field simulation water containing 10% of IOB bacterial liquid is added during testing, and high-purity CO is introduced before the experiment2Controlling the strength of the magnetic field to be 76mT within one hour, and observing the corrosion weight loss, corrosion inhibition efficiency and corrosion morphology under the coexistence condition of the magnetic field and microorganisms。
(4) Concurrent corrosion testing of microorganisms and corrosion inhibitors (inhibitors)
The corrosion testing device is used for carrying out the corrosion test of the coexistence of the microorganisms and the corrosion inhibitor, the magnetic field is removed during the test, the oil field simulation water containing 10 percent of IOB bacterial liquid is added, and high-purity CO is introduced before the experiment2One hour, the concentration of the corrosion inhibitor (imidazoline intermediate) is 100mg/L, and the corrosion weight loss, corrosion inhibition efficiency and corrosion morphology of the corrosion inhibitor and the IOB under the coexistence condition are inspected.
(5) Corrosion test with coexistence of microorganisms, corrosion Inhibitor (Inhibitor) and Magnetic Field (MF)
The corrosion testing device is used for testing the coexistence corrosion of microorganisms, corrosion inhibitors (imidazoline intermediates) and magnetic fields, oil field simulation water containing 10 percent of IOB bacterial liquid is added during testing, and high-purity CO is introduced before the experiment2One hour, the concentration of the corrosion inhibitor is added to be 100mg/L, the strength of the magnetic field is controlled to be 76mT, and the corrosion weight loss, corrosion inhibition efficiency and corrosion morphology of the corrosion inhibitor, the magnetic field and the IOB under the coexistence condition are inspected.
The results of the bacterial load change test of FIG. 2 show that the presence of a magnetic field inhibits the IOB activity, and that the IOB bacterial load decreases with increasing corrosion inhibitor concentration, indicating that the corrosion inhibitors have a toxic effect on the IOB; under the coexistence condition of the corrosion inhibitor and the magnetic field, the amount of the IOB bacteria is obviously reduced, which shows that the corrosion inhibitor and the magnetic field can synergistically inhibit the activity of the IOB.
The corrosion weight loss test results of FIG. 3 show that the corrosion weight loss in the presence of IOB alone is 1.286 + -0.157 mm/y, the corrosion weight loss in the presence of IOB and corrosion inhibitor is 0.390 + -0.033 mm/y, the corrosion weight loss in the presence of IOB and magnetic field is 0.656 + -0.100 mm/y, and the corrosion weight loss in the presence of IOB, magnetic field and corrosion inhibitor is 0.126 + -0.025 mm/y. It is demonstrated that corrosion inhibitors and magnetic fields can synergistically reduce the corrosive effects of IOBs.
The corrosion inhibition efficiency test result of fig. 4 shows that the corrosion inhibition efficiency is 69.7% when the corrosion inhibitor exists alone, 49.0% when the magnetic field exists alone, and 90.2% when the corrosion inhibitor and the magnetic field are coupled, which indicates that the magnetic field and the corrosion inhibitor have a synergistic effect.
The corrosion topography test result of fig. 5 can show that very obvious local corrosion is realized, and the depth of a corrosion pit reaches 163.1 μm; the corrosion morphology test result in fig. 6 shows that the sample has obvious scratches and light corrosion, but still has local corrosion, and the maximum depth of the corrosion pit is 14.08 μm, which indicates that the corrosion inhibitor cannot completely control microbial corrosion, especially local corrosion caused by microorganisms; the corrosion topography test results of fig. 7 show that the corrosion pits are significant, the maximum corrosion depth is 73.07 microns, and the magnetic field does inhibit microbial corrosion compared to the IOB alone; the corrosion topography test result of fig. 8 shows that the scratches of the sample are clear and obvious, and the corrosion is very slight, which indicates that the corrosion effect of the microorganisms can be controlled by the synergistic coupling of the magnetic field and the corrosion inhibitor.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (3)
1. A method for synergistically controlling microorganisms to corrode metal is characterized in that in the field of metal corrosion and protection of oil and gas field systems, a magnetic field and a corrosion inhibitor are utilized to synergistically reduce the corrosion effect of the microorganisms on the metal, wherein the magnetic field is a physical static magnetic field consisting of magnets, the strength of the magnetic field is 10-200mT, the corrosion inhibitor is an imidazoline medicament, and the concentration of the corrosion inhibitor is 50-200 mg/L.
2. The method of claim 1, wherein the microorganisms comprise iron oxidizing bacteria.
3. The method of claim 1, wherein the metal comprises carbon steel.
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| CN112877699B (en) * | 2021-01-13 | 2022-06-03 | 上海大学 | Metal anticorrosion device based on Hall effect |
| CN113694226A (en) * | 2021-08-20 | 2021-11-26 | 中山大学 | Method for synergistic sterilization, disinfection and biological adhesion prevention of ultraviolet sterilization corrosion inhibitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101948188A (en) * | 2010-09-13 | 2011-01-19 | 上海电力学院 | Environmentally-friendly water treatment method of scale inhibition and corrosion inhibition of industrial boiler |
| CN102633332A (en) * | 2012-04-28 | 2012-08-15 | 上海电力学院 | Green water treatment technique for controlling attachment of microbial films on surfaces of devices and pipelines in water bodies |
| CN103451660A (en) * | 2013-08-21 | 2013-12-18 | 上海电力学院 | Method for improving performance of corrosion inhibitor in industrial cooling water system |
| CN108980517A (en) * | 2018-09-27 | 2018-12-11 | 江苏清源管道技术有限公司 | A kind of pipe electromagnetic anti-corrosive apparatus and method |
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| MX2015009643A (en) * | 2015-07-27 | 2017-01-26 | Inst Mexicano Del Petróleo | Corrosion inhibitor derived from vegetable oils and its production process. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948188A (en) * | 2010-09-13 | 2011-01-19 | 上海电力学院 | Environmentally-friendly water treatment method of scale inhibition and corrosion inhibition of industrial boiler |
| CN102633332A (en) * | 2012-04-28 | 2012-08-15 | 上海电力学院 | Green water treatment technique for controlling attachment of microbial films on surfaces of devices and pipelines in water bodies |
| CN103451660A (en) * | 2013-08-21 | 2013-12-18 | 上海电力学院 | Method for improving performance of corrosion inhibitor in industrial cooling water system |
| CN108980517A (en) * | 2018-09-27 | 2018-12-11 | 江苏清源管道技术有限公司 | A kind of pipe electromagnetic anti-corrosive apparatus and method |
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