CN107385449A - A kind of corrosion inhibiter preparation method and application for suppressing carbon steel sour corrosion - Google Patents
A kind of corrosion inhibiter preparation method and application for suppressing carbon steel sour corrosion Download PDFInfo
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- CN107385449A CN107385449A CN201710684186.0A CN201710684186A CN107385449A CN 107385449 A CN107385449 A CN 107385449A CN 201710684186 A CN201710684186 A CN 201710684186A CN 107385449 A CN107385449 A CN 107385449A
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- corrosion
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- imidazoline
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- UNPMOEGECLWVFJ-UHFFFAOYSA-N NCCN1C(CCc2ccccc2)=NCC1 Chemical compound NCCN1C(CCc2ccccc2)=NCC1 UNPMOEGECLWVFJ-UHFFFAOYSA-N 0.000 description 1
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
- C23G1/068—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors compounds containing a C=C bond
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D233/20—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D233/24—Radicals substituted by nitrogen atoms not forming part of a nitro radical
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a kind of corrosion inhibiter of oil field sour environment medium carbon steel, i.e., suppressing carbon steel and its product in oil field pickle or saturation CO2The preparation and application of a kind of less toxic, the efficient corrosion inhibiter corroded in medium.Its preparation method is to obtain benzenpropanoic acid imidazolidine derivatives through dehydration with 3 benzenpropanoic acids and diethylenetriamine, and product of the present invention can prevent carbon steel with pickle or containing CO2Caused general corrosion and local corrosion in medium contact process, the compound are not yet used as metal inhibitor.Using the corrosion inhibiter of the present invention, production simplicity, small toxicity, corrosion inhibition rate are high, can effectively suppress pickle or CO2To the corrosion failure of carbon steel, have broad application prospects.Step is simple and convenient to operate, is practical.
Description
Technical field
The present invention relates to the imidazoline inhibitor for suppressing carbon steel sour corrosion, i.e., suppressing carbon steel and its product in pickling
Liquid or CO2A kind of less toxic, efficient, the cheap imidazolidine derivatives corroded in environment and its application.
Background technology
The oil-water mixture complicated component of oil gas field extraction, mainly contains salt, carbon dioxide and hydrogen sulfide etc., formation
Sour environment can cause serious corrosion failure to inner-walls of duct；In addition, oil field can also remove pipeline using the method for pickling
The salt crust that inwall is formed, can also cause certain corrosion to inner-walls of duct.Therefore, in order to suppress the sour corrosion of pipeline, extend
Pipeline life, oil gas field is typically by the way of corrosion inhibiter is added.
In numerous corrosion inhibiter, imidazoline corrosion inhibitor has efficient, low toxicity and biology easy because of its special structure composition
The features such as degraded, at home and abroad have been obtained for extensive use in oil gas field.
Imidazolidine derivatives are usually the five yuan of nitrogen-containing heteros for being carried out dehydration by organic carboxyl acid and polyethylene polyamine and being obtained
Cycle compound, wherein N atoms contain unshared electronics pair, can form coordinate bond with the empty 3d tracks of Fe atoms, make molecule
Absorption forms corrosion inhibiter adsorbed film in metal surface, metal and corrosive medium is separated, so as to reach inhibition purpose.Imidazoline
Class corrosion inhibiter has preferable corrosion inhibition in sour environment, and less toxic, degradable, has in terms of corrosive pipeline is suppressed
Higher application value.Therefore, the present invention be prepared for a kind of new imidazoline corrosion inhibitor and have studied its in pickle and
CO2Corrosion inhibition in environment.
The preparation method of a kind of Imidazoline corrosion inhibitors of Chinese patent CN201210421966.3 and inhibition system, but its palm fibre
The corrosion inhibiter poorly water-soluble of palmitic acid acid synthesis and can not meet in strong acid environment, it is necessary to the complicated later stage is modified to improve water solubility
Inhibition requirement.
The content of the invention
In order to overcome above-mentioned deficiency, the present invention provides the inhibition that a kind of environmentally friendly, less toxic, efficient active ingredient is imidazoline
Agent, to suppress the corrosion of carbon steel and its product in sour environment.The phenylpropyl imidazoline inhibitor synthesized by the present invention
With preferable water solubility, solubility is high in aqueous；The corrosion of pickle (strong acid environment) medium carbon steel can effectively be suppressed,
In 1mol/L HCl solution add 50ppm the corrosion inhibiter, 97.9% can reach to the corrosion inhibition rate of 20# steel, have dosage it is low,
The advantages of efficiency high.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of Imidazoline corrosion inhibitor for suppressing carbon steel sour corrosion, the Imidazoline corrosion inhibitor is phenylpropyl imidazoline
Derivative, its structural formula are as follows：
In order to obtain a kind of imidazoline inhibitor with more excellent corrosion inhibition, the present invention uses quantum chemistry calculation research
The carboxylic acids such as 3- benzenpropanoic acids, pentadecanoic acid, palmitic acid, Heptadecanoic acide, stearic acid, oleic acid, nonadecylic acid and diethylenetriamine are anti-
The advanced linear orbital energy for the 7 kinds of imidazoline molecules that should be obtained, as a result as shown in Figure 1.As a result show：By 3- benzenpropanoic acids and divinyl
The Δ E for the phenylpropyl imidazoline that triamine obtains will be significantly less than other imidazoline molecules, and therefore, absorption property is best.In research
Also chance on：Phenylpropyl imidazolidine derivatives can not only suppress carbon steel in CO2Corrode in environment, also to pickle (strong acid
Environment) corrosion of medium carbon steel has preferable inhibition.
Preferably, the energy gap difference Δ E of the Imidazoline corrosion inhibitor is between 4.535~4.690eV.
Preferably, in the infrared spectrum of the Imidazoline corrosion inhibitor, 3287cm-1For-N-H stretching vibration peak,
3026cm-1For phenyl ring=C-H stretching vibration peaks, 1604cm-1For-C=N double bond absorption peaks, 1650cm-1And 1555cm-1For pair
The absworption peak of product amide, 700cm-1And 752cm-1Two peaks represent the monosubstituted compound that the product is phenyl ring.
Present invention also offers a kind of preparation method for the Imidazoline corrosion inhibitor for suppressing carbon steel sour corrosion, including：
Using 3- benzenpropanoic acids, diethylenetriamine as raw material, amidation process, ring are carried out successively under the conditions of existing for dimethylbenzene
Change reaction, be evaporated under reduced pressure, dry, produce.
Azeotropic agent can make have good dissolubility between reactant, be advantageous to the positive progress of reaction, in addition, azeotropic agent can and
The water azeotropic of generation is reacted, plays a part of being dehydrated in time, reaction is carried out to generation product direction.Therefore, the present invention is preferred
It is 5~8 to add with the mol ratio of diethylenetriamine：15~18 dimethylbenzene.
Now there are some researches show：Theoretically feed molar proportioning should be 1：1, but amine is excessively advantageous to the conjunction of imidazoline
Into, and suppress the generation of side reaction.The mol ratio of currently preferred 3- benzenpropanoic acids, diethylenetriamine and dimethylbenzene is：15
~18：15~18：5~8.Now, it is ensured that organic acid reaction is complete, and the corrosion inhibiter of the synthesis corrosion mitigating effect in strong acid can reach
97.9%.
Rise reaction temperature is advantageous to reaction and carried out to terminal.Temperature is too high in the reaction, easily causes amine to be oxidized,
Influence synthetic effect and product quality.Therefore, currently preferred amidation reaction condition is：At 160~180 DEG C, reaction 4
~6h；Cyclization condition is：At 210~230 DEG C, 2.5~3.5h is reacted.
Under these conditions, the yield of product is up to 87.3%.
Present invention also offers Imidazoline corrosion inhibitor prepared by any above-mentioned method.
Present invention also offers any above-mentioned Imidazoline corrosion inhibitor in carbon steel pickling liquid or saturation CO2Answering in salt solution
With.
Present invention also offers one kind to suppress carbon steel in pickle or CO2The method corroded in environment, including：
Imidazoline corrosion inhibitor any one of claim 1-3 or 8 is scattered in saturation CO at normal temperatures2Salt solution
Or in pickle, the dosage of the Imidazoline corrosion inhibitor is that concentration is 50-300ppm.
Beneficial effects of the present invention
(1) it is convenient for production.Corrosion inhibiter active ingredient of the present invention is phenylpropyl imidazoline, is 3- benzenpropanoic acids and diethylenetriamine
The product obtained through two step dehydrations, synthesis are simple.
(2) small toxicity.Corrosion inhibiter of the present invention compared with currently used organic carbon steel corrosion inhibitor, easily make by not phosphorous, sulphur etc.
Into the element of environmental pollution, meet the trend that green corrosion inhibitor develops.
(3) efficiency high.Corrosion inhibiter of the present invention has the characteristics of dosage is small, and corrosion inhibition is high.
(4) preparation method of the present invention is simple, inhibition efficiency is high, practical, easy to spread.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the advanced linear orbital energy quantum chemistry calculation figure of different imidazoline molecules.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
To achieve the above object, the technical solution adopted by the present invention is：By a variety of imidazoline molecules of quantum chemistry calculation,
The optimal phenylpropyl imidazolidine derivatives of absorption property are finally obtained, can be as the carbon steel corrosion inhibitor in sour environment, structural formula
For：
The preparation method of phenylpropyl imidazoline：
After the dimethylbenzene mixing for taking 15g 3- benzenpropanoic acids, 15mL diethylenetriamine, 7mL, carry out magnetic agitation and start
Heating；170 DEG C are warming up to, carries out amidation process 5h, is warming up to 220 DEG C afterwards, carries out cyclization 3h；After completion of the reaction will
It is transferred to carries out steaming unnecessary diethylenetriamine and dimethylbenzene in Rotary Evaporators, is placed in vacuum drying chamber afterwards
Middle air drying, finally give the phenylpropyl imidazolidine derivatives of dark brown viscous shape.
The present invention uses the absorption property of quantum chemistry calculation research phenylpropyl imidazoline and tests phenylpropyl with weight-loss method
Corrosion inhibition of the imidazoline in sour environment.The absorption property of different imidazoline molecules is have studied using quantum chemistry calculation；
Weightless test is using static full leaching suspension method, and 3 parallel samples are selected in every group of experiment, and 25 DEG C of temperature, experimental period, 168h, corroded
Medium is 1M hydrochloric acid and CO2The 3.5%NaCl solution of saturation.
Embodiment 1
Quantum chemistry calculation:
The carboxylics such as 3- benzenpropanoic acids, pentadecanoic acid, palmitic acid, Heptadecanoic acide, stearic acid, oleic acid, nonadecylic acid are calculated respectively
Acid and diethylenetriamine react the advanced linear orbital energy of 7 kinds of obtained imidazoline molecules, as a result as shown in Figure 1.
The Δ E of the phenylpropyl imidazoline obtained by 3- benzenpropanoic acids and diethylenetriamine will be significantly less than other imidazolines point
Son, therefore absorption property is best.
Embodiment 2
The preparation method of phenylpropyl imidazoline：
After the dimethylbenzene mixing for taking 15g 3- benzenpropanoic acids, 15mL diethylenetriamine, 7mL, carry out magnetic agitation and start
Heating；170 DEG C are warming up to, carries out amidation process 5h, is warming up to 220 DEG C afterwards, carries out cyclization 3h；After completion of the reaction will
It is transferred to carries out steaming unnecessary diethylenetriamine and dimethylbenzene in Rotary Evaporators, is placed in vacuum drying chamber afterwards
Middle air drying, the phenylpropyl imidazolidine derivatives of dark brown viscous shape are finally given, the yield of product is up to 85.1%.
The infrared spectrum data of product are as follows：
3287cm-1For-N-H stretching vibration peak, 3026cm-1Place occur phenyl ring=C-H stretching vibration peaks,
1604cm-1Locate as-C=N double bond absorption peaks, be the characteristic absorption peak of imidazoline, 1650cm-1And 1555cm-1Locate as accessory substance acyl
The absworption peak of amine, it can be seen that synthetic product is the mixture of imidazoline and acid amides.700cm-1And 752cm-1Two, place peak represents
The product is the monosubstituted compound of phenyl ring.
Embodiment 3
The preparation method of phenylpropyl imidazoline：
After the dimethylbenzene mixing for taking 15g 3- benzenpropanoic acids, 18mL diethylenetriamine, 7mL, carry out magnetic agitation and start
Heating；170 DEG C are warming up to, carries out amidation process 5h, is warming up to 220 DEG C afterwards, carries out cyclization 3h；After completion of the reaction will
It is transferred to carries out steaming unnecessary diethylenetriamine and dimethylbenzene in Rotary Evaporators, is placed in vacuum drying chamber afterwards
Middle air drying, the phenylpropyl imidazolidine derivatives of dark brown viscous shape are finally given, the yield of product is up to 87.3%.
Embodiment 4
The preparation method of phenylpropyl imidazoline：
After the dimethylbenzene mixing for taking 15g 3- benzenpropanoic acids, 16mL diethylenetriamine, 7mL, carry out magnetic agitation and start
Heating；170 DEG C are warming up to, carries out amidation process 5h, is warming up to 220 DEG C afterwards, carries out cyclization 3h；After completion of the reaction will
It is transferred to carries out steaming unnecessary diethylenetriamine and dimethylbenzene in Rotary Evaporators, is placed in vacuum drying chamber afterwards
Middle air drying, the phenylpropyl imidazolidine derivatives of dark brown viscous shape are finally given, the yield of product is up to 86.5%.
Embodiment 5
Condition：Experiment material is 20# carbon steels, and the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in into 1M (mol/L) salt
In acid, disperseed 20 minutes with ultrasonic wave, be configured to the medium of the 50ppm containing corrosion inhibiter.25 DEG C of temperature, test period 168h.
It is 97.9% to obtain inhibition efficiency by experiment test, is shown as that dosage is low, corrosion inhibiter of efficiency high.
(in the presence of corrosion, system change can occur for the quality of material, and this uses gravimetric detemination material resistance to corrosion
Theoretical foundation.Gravimetric method is largely applied due to simple and directly perceived in laboratory and field experiment.)
Weight-loss method is to determine corrosion rate in the front and rear weight change of corrosion according to material, for convenience of different experimental conditions
Lower and various sample data are compared to each other analysis, and the weightlessness in the generally use unit interval in unit area is that formula (1) comes
Average corrosion rate is characterized, inhibition efficiency of the corrosion inhibiter to carbon steel can be obtained by formula (2).
Embodiment 6
Condition：Experiment material is 20# carbon steels, and the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in 1M hydrochloric acid, is used
Ultrasonic wave is scattered 20 minutes, is configured to the medium of the 100ppm containing corrosion inhibiter.25 DEG C of temperature, test period 168h.
It is 98.1% to obtain inhibition efficiency by experiment test, is shown as that dosage is low, corrosion inhibiter of efficiency high.
Embodiment 7
Condition：Experiment material is 20# carbon steels, and the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in 1M hydrochloric acid, is used
Ultrasonic wave is scattered 20 minutes, is configured to the medium of the 200ppm containing corrosion inhibiter.25 DEG C of temperature, test period 168h.
It is 97.2% to obtain inhibition efficiency by experiment test, is shown as that dosage is low, corrosion inhibiter of efficiency high.
Embodiment 8
Condition：Experiment material is 20# carbon steels, and the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in 1M hydrochloric acid, is used
Ultrasonic wave is scattered 20 minutes, is configured to the medium of the 300ppm containing corrosion inhibiter.25 DEG C of temperature, test period 168h.
It is 98.4% to obtain inhibition efficiency by experiment test, is shown as that dosage is low, corrosion inhibiter of efficiency high.
Embodiment 9
Condition：Experiment material is 20# carbon steels, and it is molten that the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in into 3.5%NaCl
In liquid, disperseed 20 minutes with ultrasonic wave, be configured to the medium of the 100ppm containing corrosion inhibiter.CO is passed through before experiment2To saturation and in reality
CO is continuously passed through during testing2.25 DEG C of temperature, experimental period 168h.
It is 38.9% to obtain inhibition efficiency by experiment test, and display corrosion inhibiter has certain corrosion mitigating effect.
Embodiment 10
Condition：Experiment material is 20# carbon steels, and it is molten that the phenylpropyl imidazoline of a certain amount of embodiment 2 is dissolved in into 3.5%NaCl
In liquid, disperseed 20 minutes with ultrasonic wave, be configured to the medium of the 200ppm containing corrosion inhibiter.CO is passed through before experiment2To saturation and in reality
CO is continuously passed through during testing2.25 DEG C of temperature, experimental period 168h.
It is 41.0% to obtain inhibition efficiency by experiment test, and display corrosion inhibiter has certain corrosion mitigating effect.
Above-mentioned experiment shows：Corrosion inhibiter of the present invention is better than to CO to the corrosion mitigating effect of hydrochloric acid2Corrosion mitigating effect.This is probably
Due in CO2In corrosion process, the Fe of metal surface generation2CO3Metal surface can be attached to Deng corrosion product, hinders corrosion inhibiter
Molecular Adsorption has detrimental effect in metal surface, the performance to corrosion inhibition；During hcl corrosion, the corrosion product master of iron
To exist in the form of an ion, inhibitor molecular can directly act on the fine and close adsorbed film of generation with metal surface and be situated between to obstruct corrosion
Matter.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of Imidazoline corrosion inhibitor for suppressing carbon steel sour corrosion, it is characterised in that the Imidazoline corrosion inhibitor is benzene
Propyl imidazole quinoline derivant, its structural formula are as follows：
2. Imidazoline corrosion inhibitor as claimed in claim 1, it is characterised in that the energy gap difference Δ of the Imidazoline corrosion inhibitor
E is between 4.535~4.690eV.
3. Imidazoline corrosion inhibitor as claimed in claim 1, it is characterised in that the infrared spectrum of the Imidazoline corrosion inhibitor
In, 3287cm-1For-N-H stretching vibration peak, 3026cm-1For phenyl ring=C-H stretching vibration peaks, 1604cm-1It is double for-C=N
Key absworption peak, 1650cm-1And 1555cm-1For the absworption peak of accessory substance acid amides, 700cm-1And 752cm-1Two peaks represent the product
For the monosubstituted compound of phenyl ring.
A kind of 4. preparation method for the Imidazoline corrosion inhibitor for suppressing carbon steel sour corrosion, it is characterised in that including：
Using 3- benzenpropanoic acids, diethylenetriamine as raw material, amidation process, cyclisation are carried out successively under the conditions of existing for dimethylbenzene instead
Should, it is evaporated under reduced pressure, dries, produces.
5. method as claimed in claim 4, it is characterised in that mole of the 3- benzenpropanoic acids, diethylenetriamine and dimethylbenzene
Than for：15~18：15~18：5~8.
6. method as claimed in claim 4, it is characterised in that the amidation reaction condition is：At 160~180 DEG C, instead
Answer 4~6h.
7. method as claimed in claim 4, it is characterised in that the cyclization condition is：At 210~230 DEG C, reaction
2.5~3.5h.
8. Imidazoline corrosion inhibitor prepared by the method described in claim any one of 4-7.
9. the Imidazoline corrosion inhibitor any one of claim 1-3 or 8 is in organic carbon steel pickle or saturation CO2Salt solution
In application.
10. one kind suppresses carbon steel in pickle or CO2The method corroded in environment, it is characterised in that including：
Imidazoline corrosion inhibitor any one of claim 1-3 or 8 is scattered in saturation CO at normal temperatures2Salt solution or acid
In washing lotion, the dosage of the Imidazoline corrosion inhibitor is that concentration is 50-300ppm.
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| CN112300131A (en) * | 2020-10-30 | 2021-02-02 | 华中科技大学 | Imidazoline corrosion inhibitor with asymmetric terminal group and preparation method and application thereof |
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| CN108315743A (en) * | 2018-03-02 | 2018-07-24 | 武汉华科特新技术有限公司 | A kind of preparation method of ergometrine restrainer |
| CN112300131A (en) * | 2020-10-30 | 2021-02-02 | 华中科技大学 | Imidazoline corrosion inhibitor with asymmetric terminal group and preparation method and application thereof |
| CN112300131B (en) * | 2020-10-30 | 2021-12-31 | 华中科技大学 | Imidazoline corrosion inhibitor with asymmetric terminal group and preparation method and application thereof |
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