CN109023381A - Neutralize corrosion inhibiter and its preparation method and application - Google Patents
Neutralize corrosion inhibiter and its preparation method and application Download PDFInfo
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- CN109023381A CN109023381A CN201811256934.6A CN201811256934A CN109023381A CN 109023381 A CN109023381 A CN 109023381A CN 201811256934 A CN201811256934 A CN 201811256934A CN 109023381 A CN109023381 A CN 109023381A
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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
Abstract
The present invention proposes a kind of neutralization corrosion inhibiter and its preparation method and application, belongs to chemical technology field, and it is poor to be able to solve existing water soluble rust inhibitor slow release effect, the insufficient technical problem of protection effect.The raw material components and its parts by weight that the neutralization corrosion inhibiter includes are as follows: 20~50 parts of amphoteric imidazoline class corrosion inhibiter, 10~30 parts of organic amine, 5~30 parts of cosurfactant, 2~5 parts of auxiliary agent.Corrosion inhibiter provided by the invention has good water solubility, the advantages of having had both corrosion inhibition easy to use and excellent, applied to oil processing equipment anti-corrosion, it can be good at adapting to the working environment of high temperature peracid, with preferable protection effect, and the simple production process of the corrosion inhibiter, it is at low cost, it is environmental-friendly, there is good economic value.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to neutralize corrosion inhibiter and its preparation method and application.
Background technique
Due to the increasingly heaviness of conventional crude, crude oil in poor quality trend is increasingly apparent, in addition being in oil extraction process
A large amount of acid solutions of recovery ratio injection are improved, so that acid content, sulfur content, chlorinity, the ratio of salt content are higher and higher in crude oil,
Cause the seriously corrodeds such as the equipment in petroleum refining process, such as Atmospheric vacuum, distilling apparatus and pipeline, and it is long to become device
The important safety hidden danger of period run.
Organic and nothing other than hydrocarbon, in crude oil also containing a small amount of sulphur, chlorine, nitrogen and metallic element composition
Machine hybrid, content account for about 5%, although content is few, these impurity have the technique of oil refining and the quality of product important
It influences.During heating, the chloride in crude oil, sulfide, which decompose, generates hydrogen chloride and hydrogen sulfide, and in fractionating column with
Oil gas rises, and condenses together with vapor in tower top circulation, forms HCl-H2S-H2O corrosive environment, especially in dew point position
Initial stage condensed water pH value is very low, brings great threat to equipment.
In order to ensure normal production operation, industrially pass through upgrade of material to equipment and pipeline and filling corrosion inhibiter etc.
Measure inhibits the corrosion of fractionating tower equipment.In the selection of corrosion inhibiter, since imidazoline ring is coordinated in iron surface and make imidazoles
Quinoline class corrosion inhibiter has many advantages, such as preferably corrosion inhibition, and imidazoline corrosion inhibitor has green, environmental protection, low toxicity, by
Everybody concern.
Existing imidazoline corrosion inhibitor can be divided into water-soluble imidazoline class corrosion inhibiter and oil-soluble imidazoline corrosion inhibitor,
Two class corrosion inhibiter respectively have advantage and disadvantage.As Chinese patent CN2015105819428 discloses " it is a kind of inhibit fractionation tower top to follow corrosion
This oil-soluble inhibitor of the preparation method of oil-soluble inhibitor " can play preferable corrosion mitigating effect, but post-processing is cumbersome,
Operating procedure is complex, it has not been convenient to apply；Compared to oil-soluble inhibitor, the aftertreatment technology of water soluble rust inhibitor is more simple
It is single, it is more suitable prior art, but its slow release effect is poor, cannot play sufficient protection effect.Currently, there is an urgent need to develop
One kind is function admirable and corrosion inhibiter easy to operate.
Summary of the invention
The present invention provides corrosion inhibiter and its preparation method and application is neutralized, which has good water solubility, simultaneous
Have the advantages of corrosion inhibition easy to use and excellent, be applied to oil processing equipment anti-corrosion, can be good at adapting to high temperature
The working environment of peracid has preferable protection effect, and the simple production process of the corrosion inhibiter, at low cost, environmental-friendly, tool
There is good economic value.
In order to achieve the above object, the present invention provides a kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight
Number are as follows:
Preferably, the amphoteric imidazoline class corrosion inhibiter is lauroyl both sexes base diethyl acid disodium, cocounut oil acyl both sexes
One of base diethyl acid disodium, Sodium Lauroamphoacetate are a variety of.
Preferably, the organic amine be one of trimethylamine, ethamine, ethylenediamine, triethylamine, thiocarbamide, thiophene or
It is a variety of.
Preferably, the cosurfactant be cetyl trimethylammonium bromide, cetyl benzenesulfonic acid sodium,
One of dodecyl sodium sulfate, fatty alcohol polyoxyethylene ether are a variety of.
Preferably, the auxiliary agent is the one or more of alkynol compound or metal iodide.
Preferably, the alkynol compound is one of propilolic alcohol or butynediols or a variety of.
Preferably, the metal iodide is one or both of potassium iodide, sodium iodide.
Preferably, comprising raw material components and its parts by weight are as follows: the amphoteric imidazoline class corrosion inhibiter be lauroyl
30 parts of acid disodium of both sexes base diethyl, organic amine is trimethylamine, ethylenediamine and thiocarbamide, wherein 5 parts of trimethylamine, 10 parts of ethylenediamine, and sulphur
5 parts of urea, cosurfactant is 10 parts of cetyl trimethylammonium bromide, and auxiliary agent is propilolic alcohol and potassium iodide, wherein propine
2 parts of alcohol, 2 parts of potassium iodide.
Preferably, the corrosion inhibition rate of the neutralization corrosion inhibiter is more than or equal to 96%.
The invention also discloses the preparation methods of the neutralization corrosion inhibiter, comprising: each component raw material is mixed in proportion,
It is stirred at room temperature uniformly up to neutralization corrosion inhibiter.
The invention also discloses application of the neutralization corrosion inhibiter in oil processing equipment anti-corrosion, the corrosion inhibiter
Dosage is 20~100mg/L.
Compared with prior art, the advantages and positive effects of the present invention are:
The present invention provides a kind of neutralization corrosion inhibiter and its preparation method and application, which has good water-soluble
Property, the advantages of having had both corrosion inhibition easy to use and excellent, it is applied to oil processing equipment anti-corrosion, can be good at adapting to
The working environment of high temperature peracid has preferable protection effect, and the simple production process of the corrosion inhibiter, at low cost, environment friend
It is good, there is good economic value.
Detailed description of the invention
Fig. 1 protects the metallographic microscope of steel disc sample surfaces for no corrosion inhibiter；
Fig. 2 is the metallographic microscope for having corrosion inhibiter protection steel disc sample surfaces.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The embodiment of the invention provides a kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows:
Neutralization corrosion inhibiter provided by the above embodiment using amphoteric imidazoline class corrosion inhibiter as main component, by with it is organic
The compounding of amine, cosurfactant and auxiliary agent, making it not only has the advantages that good water-soluble bring is easy to use but also simultaneous
Has excellent corrosion inhibition.
The primary raw material amphoteric imidazoline class corrosion inhibiter of the corrosion inhibiter has water solubility well, so that having good water
Dissolubility can filled the water while injected, and remove simple process, be had the advantages that easy to use.Amphoteric imidazoline class corrosion inhibiter
Molecule is amphiphatic molecule, has electropositive (quaternary ammonium salt) and elecrtonegativity (carboxyl) group, can be had with the variation of environment pH
Different charges, in acid condition, molecule show electropositive, and the ionization of carboxyl is suppressed, with intermetallic combination side
For formula based on the chelating of imidazoline ring and metal, the addition of cosurfactant and auxiliary agent at this time can play auxiliary film forming
Effect makes up the defect of antiseptic property, the compactness and hydrophobicity of the superficial molecular of imidazoline adsorbed film is improved, to improve
Anti-corrosion effect makes the corrosion inhibiter of compounding have the easy to use and superior advantage of corrosion inhibition concurrently.Further, using amphoteric imidazoline
Class corrosion inhibiter is compounded with organic amine, additionally it is possible to play the role of the effect that deacidification adjusts pH value, meanwhile, it is organic compared with inorganic base
The boiling point of amine is higher, and neutralization is stronger, can condense together with HCl, is conducive to neutralize dew point position condensed water, for its pH
The regulation of value is relatively easy to.Imidazoline corrosion inhibitor is compounded with organic amine also can avoid generating corrosion products (such as ammonium chloride)
Cause underdeposit corrosion, it is ensured that the function and effect of corrosion inhibiter.
What needs to be explained here is that compared to common naphthenic acid imidazoline or oleic imidazolinone, employed in the present invention
Amphoteric imidazoline and metal have more excellent binding ability, in addition to the nitrogen-atoms on imidazoline ring can be formed with metal
Outside chelation, the carboxyl of the other end can also have an effect with iron ion, increase the binding ability with metal.It is dense in corrosion inhibiter
When spending lower, the both ends of amphoteric imidazoline and metal bonding increase the area coverage to metal, stretch out the hydrophobic alkane come
Base plays the role of separating corrosive deposit, therefore when inhibiter consumption is lower, also shows relatively good effect.When with
When suitable cosurfactant, additive compound, in addition to surfactant the covering of metal surface can be played it is certain
Outside corrosion inhibition, amphoteric imidazoline can be combined by electrostatic interaction with surfactant, in metallic profiles at finer and close
With stable protective film, metal is substantially increased to the adaptability of harsh environment (such as high temperature, high acid value).
In addition, the amphoteric imidazoline class corrosion inhibiter of the application shows elecrtonegativity in alkaline environment, imidazole ring can be passed through
In nitrogen-atoms and metal be coordinated, can also be combined by the carboxyl of deprotonation with the electrostatic interaction of metal, in metal watch
Face forms monomolecular film, and hydrophobic alkyl chain-unfolding is outside, forms hydrophobic region in nearly metal surface, protects to apply to metal
Shield, i.e., the corrosion inhibiter of the application is equally applicable under alkaline environment, also functions to anti-corrosion corrosion mitigating effect.
In a preferred embodiment, the amphoteric imidazoline class corrosion inhibiter is lauroyl both sexes base diethyl acid disodium, coconut palm
One of oleoyl both sexes base diethyl acid disodium, Sodium Lauroamphoacetate are a variety of.The present embodiment use lauroyl and
It is the hydrophobic alkyl chain containing 12 and 8-18 carbon atom in cocounut oil acyl amphoteric imidazoline, the difference of hydrophobic chain length will lead to imidazoles
Quinoline molecule has different hydrophilic and hydrophobics and the film-forming quality in metal surface.On the one hand, the difference of hydrophobic chain length will lead to
Imidazoline molecule has different hydrophilic properties, and hydrophobic chain is longer, and the hydrophobicity of molecule is stronger, therewith oily mutually and in water phase
Distribution property also change.On the other hand, when with other surfactants or additive compound, hydrophobic chain length will affect it
Between interaction.Such as when with surfactant compound, when hydrophobic chain length is longer in imidazoline and in surfactant
Hydrophobic interchain hydrophobic interaction it is stronger, fine and close hydrophobic film layer is advantageously formed, but if the hydrophobic effect of the two is too
By force, may influence whether the bond strength of they and metal, therefore, should select the imidazoline of suitable hydrophobic chain length with it is appropriate
Surfactant molecule is compounded to play the effect of synergistic effect.And each component disclosed in above preferred embodiment compounds,
Good coordinative role can be played, can the corrosion inhibiter of reinforcing material and the bond strength of metal material, in high temperature, high acid environment
Play outstanding anticorrosion ability.
In a preferred embodiment, organic amine is one of trimethylamine, ethamine, ethylenediamine, triethylamine, thiocarbamide, thiophene
Or it is a variety of.
In a preferred embodiment, cosurfactant is cetyl trimethylammonium bromide, cetyl benzenesulfonic acid
One of sodium, dodecyl sodium sulfate, fatty alcohol polyoxyethylene ether are a variety of.The cosurfactant that the present embodiment uses
It can play the role of auxiliary film forming, as the cationic surfactant in cosurfactant can fill up imidazoline adsorbed film
In the gap of metal surface, so that inhibitor film is finer and close, corrosion mitigating effect is more preferable.In cosurfactant, nonionic
Surfactant can be incorporated in protective cover by the interaction with hydrophobic chain in imidazoline, improve inhibitor film
Structure improves corrosion mitigating effect in turn.Sulphur atom or carboxyl are usually contained in anionic surfactant, chela can occur with metal
Cooperation is used, and the bond strength of film layer and metal is improved.Different cosurfactants is with imidazoline and by protection metal
Mechanism of action is different, is compounded by reasonable raw material, can effectively improve the corrosion mitigating effect of corrosion inhibiter.
In a preferred embodiment, auxiliary agent is the one or more of alkynol compound or metal iodide.In an optional reality
It applies in example, the alkynol compound is one of propilolic alcohol or butynediols or a variety of, and metal iodide is potassium iodide.This
The auxiliary agent that embodiment uses can play the role of auxiliary film forming, and the introducing of alkynol can be formed more in metal surface in auxiliary agent
Uniformly, fine and close adsorbed film；In an acidic solution, iodide ion is adsorbed on metal surface to metal iodide, so that metal surface band
Negative electrical charge, with this condition, used imidazoline corrosion inhibitor be it is positively charged, it is logical with the iodide ion that is adsorbed on metal surface
It crosses electrostatic attraction formation arch formation and corrosion inhibition rate can be improved to increase corrosion inhibiter in the area coverage of metal surface.
It is understood that the available actual contents of each component are listed in above-described embodiment, using above-mentioned cited
What group was grouped as, which matches, can effectively realize the technical effect reached desired by the application.But it is also not limited to above-mentioned cited
, it can also be the other materials that those skilled in the art can rationally be replaced.
The embodiment of the invention also provides a kind of preparation methods for neutralizing corrosion inhibiter, for each component raw material is added in proportion
In reaction kettle, mixing 15-60 minutes is stirred at room temperature, can be prepared by neutralizing corrosion inhibiter.Preparation method provided in this embodiment is normal
It can be carried out under temperature, the mixing of some chemicals of commercialization is used in preparation process, without reference to works such as synthesis, heating
Skill, preparation process is simple, and cost is relatively low, meanwhile, because the processes such as do not heat, cool down, also without exhaust gas, useless in mixed process
The discharge of liquid, entire production process meet energy-saving and environment-friendly requirement.
The embodiment of the present invention also provides the application with corrosion inhibiter in oil processing equipment anti-corrosion among the above, the corrosion inhibiter
Dosage when in use is 20-100mg/L.Neutralization corrosion inhibiter provided in the present embodiment can be applied to oil processing equipment
In anti-corrosion, it can be good at the working environment for adapting to high temperature peracid, there is preferable protection effect, after tested, corrosion inhibition rate can
Up to 96% or more, and the corrosion inhibiter good water solubility, it can fill the water while inject, removal technique is also very simple, has easy to use
The advantages of.
Embodiment 1
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: cocounut oil acyl both sexes base diethyl acid disodium 20
Part, 10 parts of ethylenediamine, 5 parts of cetyl benzenesulfonic acid sodium, 5 parts of fatty alcohol polyoxyethylene ether, 2 parts of butynediols.
Embodiment 2
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: 50 parts of Sodium Lauroamphoacetate, thiophene
30 parts of pheno, 5 parts of dodecyl sodium sulfate, 5 parts of potassium iodide.
Embodiment 3
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: lauroyl both sexes base diethyl acid disodium 30
Part, organic amine is 5 parts of trimethylamine, and 10 parts of ethylenediamine, 5 parts of thiocarbamide, cosurfactant is cetyl trimethylammonium bromide
10 parts, auxiliary agent is propilolic alcohol and potassium iodide, wherein 2 parts of propilolic alcohol, 2 parts of potassium iodide.
Embodiment 4
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: lauroyl both sexes base diethyl acid disodium 25
Part, 15 parts of trimethylamine, 10 parts of diethylamine, 15 parts of cetyl trimethylammonium bromide, 1 part of propilolic alcohol, 3 parts of sodium iodide.
Embodiment 5
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: lauroyl both sexes base diethyl acid disodium 40
Part, 10 parts of ethamine, 10 parts of thiocarbamide, 10 parts of cetyl trimethylammonium bromide, 5 parts of fatty alcohol polyoxyethylene ether, butynediols 3
Part, 2 parts of potassium iodide.
Embodiment 6
A kind of neutralization corrosion inhibiter, the raw material components for including and its parts by weight are as follows: 30 parts of Sodium Lauroamphoacetate, three
15 parts of methylamine, 10 parts of ethylenediamine, 15 parts of dodecyl trimethyl ammonium bromide, 1 part of propilolic alcohol, 3 parts of potassium iodide
Comparative example 1
Corrosion inhibiter I, the raw material components for including and its parts by weight are as follows: 30 parts of naphthenic acid imidazoline (water solubility), organic amine
It is 5 parts of trimethylamine, 10 parts of ethylenediamine, 5 parts of thiocarbamide, cosurfactant is 10 parts of cetyl trimethylammonium bromide, auxiliary agent
For propilolic alcohol and potassium iodide, wherein 2 parts of propilolic alcohol, 2 parts of potassium iodide.
Comparative example 2
Corrosion inhibiter II, the raw material components for including and its parts by weight are as follows: 30 parts of oleic imidazolinone, organic amine is trimethylamine 5
Part, 10 parts of ethylenediamine, 5 parts of thiocarbamide, cosurfactant be 10 parts of cetyl trimethylammonium bromide, auxiliary agent be propilolic alcohol and
Potassium iodide, wherein 2 parts of propilolic alcohol, 2 parts of potassium iodide.
Performance test
Preservative challenge testing
The corrosion inhibiter of embodiment 1-6 and the corrosion inhibiter of comparative example, blank control (distilled water) are compared using weight-loss method
Compared with experiment condition is as follows:
Simulation corrosive liquid: a certain amount of concentrated hydrochloric acid and H are added in deionized water2S saturated solution to mix after mixing
Specific concentration is HCl:1000mg/L, H in object2S:500mg/L
Metal material: A3 steel disc, 50 × 10 × 3mm
Experimental provision: experiment is carried out being placed in 250 in thermostat milliliters of there-necked flasks
Experimental temperature: 90 DEG C
Experimental period: for 24 hours
Corrosion inhibiter dosage: 20-100mg/L
Evaluation method: analysis weighs the weight of test front and back steel disc, and the corrosion inhibition rate of corrosion inhibiter, institute are calculated according to steel disc weightlessness
It is as follows to obtain result:
The corrosion inhibiter of embodiment can play slow well under the conditions of high temperature peracid it can be seen from above-mentioned experimental result
Effect is lost, corrosion inhibition rate uses compound corrosion inhibitor made from the amphoteric imidazoline class corrosion inhibiter of the application up to 96% or more
Corrosion mitigating effect is substantially better than comparative example using the effect of conventional naphthenic acid imidazoline or oleic imidazolinone.
After preservative challenge testing, seen using the A3 steel sample that metallographic microscope acts on blank control and embodiment 3
Examine, the metallographic microscope photo on blank control sample surface as shown in Figure 1, the sample that the corrosion inhibiter of embodiment 3 acts on metallographic
Microscope photo is as shown in Fig. 2, A3 steel disc is immersed in the simulation of the corrosion inhibiter added with embodiment 3 it can be seen from Fig. 1 and Fig. 2
In corrosive liquid after 24 hours, surface appearance is still substantially smooth, smooth surface there is no variation, and is not being added
After impregnating 24 hours in the simulation sustained-release liquid of corrosion inhibiter, there are many etch pits in steel disc surface, and etch pit connects to be formed
The trend of continuous corrosion.Further illustrate that neutralization corrosion inhibiter provided by the present invention has good corrosion mitigating effect.
The above is only the embodiment of the present invention card, is not that the invention has other forms of limitations, any
Those skilled in the art are changed or are modified as the equivalent of equivalent variations possibly also with the technology contents of the disclosure above
Embodiment is applied to other fields, but all without departing from technical solution of the present invention content, according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of neutralization corrosion inhibiter, which is characterized in that the raw material components and its parts by weight for including are as follows:
2. neutralization corrosion inhibiter according to claim 1, which is characterized in that the amphoteric imidazoline class corrosion inhibiter is laurel
One of acyl both sexes base diethyl acid disodium, cocounut oil acyl both sexes base diethyl acid disodium, Sodium Lauroamphoacetate are a variety of.
3. neutralization corrosion inhibiter according to claim 1, which is characterized in that the organic amine is trimethylamine, ethamine, second two
One of amine, triethylamine, thiocarbamide, thiophene are a variety of.
4. neutralization corrosion inhibiter according to claim 1, which is characterized in that the cosurfactant is cetyl
One of trimethylammonium bromide, cetyl benzenesulfonic acid sodium, dodecyl sodium sulfate, fatty alcohol polyoxyethylene ether are a variety of.
5. neutralization corrosion inhibiter according to claim 1, which is characterized in that the auxiliary agent is alkynol compound or metal iodine
One of compound is a variety of.
6. neutralization corrosion inhibiter according to claim 5, which is characterized in that the alkynol compound is propilolic alcohol or butine
One of glycol is a variety of.
7. neutralization corrosion inhibiter according to claim 5, which is characterized in that the metal iodide is potassium iodide, iodate
One or both of sodium.
8. neutralization corrosion inhibiter according to claim 1, which is characterized in that the raw material components and its parts by weight for including are as follows:
The amphoteric imidazoline class corrosion inhibiter is 30 parts of acid disodium of lauroyl both sexes base diethyl, and organic amine is trimethylamine, ethylenediamine and sulphur
Urea, wherein 5 parts of trimethylamine, 10 parts of ethylenediamine, 5 parts of thiocarbamide, cosurfactant is cetyl trimethylammonium bromide 10
Part, auxiliary agent is propilolic alcohol and potassium iodide, wherein 2 parts of propilolic alcohol, 2 parts of potassium iodide.
9. the preparation method described in any item of the claim 1 to 8 for neutralizing corrosion inhibiter characterized by comprising in proportion will
The mixing of each component raw material is stirred at room temperature uniformly up to neutralization corrosion inhibiter.
10. the application described in any item of the claim 1 to 8 for neutralizing corrosion inhibiter in oil processing equipment anti-corrosion, feature
It is, the dosage of the corrosion inhibiter is 20~100mg/L.
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| CN111719158A (en) * | 2020-05-27 | 2020-09-29 | 东营东方化学工业有限公司 | Corrosion inhibitor composition suitable for wide flow rate range and preparation method thereof |
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| CN111945168A (en) * | 2020-07-28 | 2020-11-17 | 广东粤首新科技有限公司 | Neutralization corrosion inhibitor and application thereof |
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