CN101368271A - Green triazole carbon steel restrainer and use thereof - Google Patents
Green triazole carbon steel restrainer and use thereof Download PDFInfo
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- CN101368271A CN101368271A CNA200710016267XA CN200710016267A CN101368271A CN 101368271 A CN101368271 A CN 101368271A CN A200710016267X A CNA200710016267X A CN A200710016267XA CN 200710016267 A CN200710016267 A CN 200710016267A CN 101368271 A CN101368271 A CN 101368271A
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- triazole
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Abstract
The invention relates to steel (carbon steel) acid pickling corrosion inhibitor, in particular to triazole carbon steel acid pickling corrosion inhibitor and application thereof. The components of the corrosion inhibitor include the combination of one or two types of 1-amido-2-sulfhydryl-5-[1'-(1'2'4'- triazole)- methylene-1H-1,3,4- triazole and 1- benzene-2-(5-[1'2'3'5'- tetrazole- methylene]-1.3.4- furodiazole) sulphane ethanone. The corrosion inhibitor can effectively prevent the corrosion to the carbon steel during the acid pickling processing and has the excellent advantages of low consumption, high corrosion inhibiting efficiency and stable corrosion inhibiting performance. The product has a broad market prospect, without pollution to the environment.
Description
Technical field
The present invention relates to steel (carbon steel) restrainer, specifically in order to prevent carbon steel and goods thereof sour corrosion and acid solution efficient carbon steel pickling corrosion inhibitor of outspent a kind of triazole class and application thereof in acid cleaning process to carbon steel material.
Background technology
The corrosion of strong acid clean surface, dirt are the important cleaning means of metal material surface pre-treatment, pipeline and the scale removal of boiler systems cleaning.Significant because of pickling to the normal operation of keeping equipment, still in industries such as metallic substance, machinery, metallurgy, chemical industry, be extensive use of so far.
Because strong acid all has corrosive nature to hardware, " crossing erosion " phenomenon often appears in the acid cleaning process, promptly not only removed the corrosion and the dirt of metallic surface in the acid cleaning process, simultaneously the part metals base material has also been disposed in the lump.Therefore both can cause Corrosion of Metallic Materials in the acid cleaning process, produced simultaneously a large amount of acid solutions have caused havoc to environment.Adding inhibiter when pickling, is to suppress the corrosion of metal in acidic medium, reduces the usage quantity of acid, improves pickling effect, prolongs the effective way of service life of equipment.
In the inhibiter commonly used at present, mainly comprise mineral compound such as chromic salt, nitrate, nitrite, because it has toxic side effect, environment friendly is relatively poor, and its application is being restricted and will progressively eliminating.And green corrosion inhibitor is not only nontoxic to environment in the process of using, and also can not cause detrimentally affect to environment in production and manufacturing processed.Therefore, develop new efficient, environmental protection, cheapness, the organic inhibitor that is easy to get has higher productive value and vast market prospect.
Summary of the invention
The object of the present invention is to provide a kind of efficient carbon steel pickling corrosion inhibitor of triazole class and application thereof of efficient, environmental protection.
For achieving the above object, the technical solution used in the present invention is:
A kind of oxadiazoles carbon steel restrainer, described inhibiter composition is 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole, 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3,4-oxadiazoles } one or both combination of sulfane base ethyl ketone; Portfolio ratio can be any ratio.
When described inhibiter was the combination of two kinds of triazole compounds, by weight better compound proportion was between them: (1-100): (1-100);
The application of described oxadiazoles carbon steel restrainer is to clean steel with the scavenging solution submergence that is added with the triazole class inhibiter; Scavenging solution is an acid solution, and the amount that adds inhibiter in every liter of acid solution is 0.001g-2.0g, and the submergence temperature is a room temperature, and the time is 1-4h;
Wherein: acid solution is dilute hydrochloric acid or dilute sulphuric acid, and concentration is 0.1mol/L-1mol/L.
Principle of the present invention is: the triazole class inhibiter that the present invention relates to is the compound with three nitrogen heterocycles, this compound also contains three nitrogen heterocyclics, intramolecularly contain nitrogen-atoms, phenyl ring ,-atomic groups such as the two keys of C=N-, can be adsorbed in steel surface effectively, play corrosion inhibition.
The invention has the beneficial effects as follows:
1. cost is low.Inhibiter of the present invention is triazole compound and derivative thereof, and synthesis step is simple, and raw material is cheap and easy to get; Belong to green type inhibiter;
2. environmental friendliness.Inhibiter of the present invention is a triazole compound, is organic inhibitor, compares with inorganic inhibitor at present commonly used, and is nontoxic, do not have the environmental problem after the use; Harmless to environment and biological nontoxic, meet the trend that green corrosion inhibitor develops;
3. consumption is low, and result of use is good.The present invention is used for the steel surface pickling, add consuming excessively of excessive etch that a spot of inhibiter just can effectively suppress metallic substance metal in acid cleaning process (promptly harmful corrosion) and acid solution, with inhibiter at present commonly used relatively, have that consumption is low, inhibition efficiency is high, continuous action ability is strong, repeatedly used outstanding advantage.
4. corrosion inhibition is stable.The present invention can bear the variation of cleaning condition, as detergent concentration, temperature, flow velocity etc., does not influence the corrosion mitigating effect of inhibiter.
In a word, inhibiter of the present invention can prevent effectively that acid has the outstanding advantage that consumption is low, inhibition efficiency is high, corrosion inhibition is stable to corrosion of Carbon Steel in acid cleaning process.Product environmentally safe of the present invention has vast market prospect.
Embodiment
The present invention carries out zero-G test according to GB10124-88 " metallic substance laboratory uniform corrosion total immersion test method ".
Embodiment 1
Pickle solution is a dilute hydrochloric acid, and concentration is 0.5M, and pickle solution consumption 100L adds 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3, and 4-triazole 30g is immersed in 4h in the pickle solution with steel to be cleaned at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 92%, is shown as inhibiter efficiently.
Embodiment 2
Pickle solution is a dilute hydrochloric acid, concentration is 0.5M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 10g, 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 10g, at ambient temperature steel to be cleaned are immersed in submergence 4h in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 95%, is shown as inhibiter efficiently.
Embodiment 3
Pickle solution is a dilute hydrochloric acid, and concentration is 1M, and pickle solution consumption 100L adds 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 40g, at ambient temperature steel to be cleaned are immersed in that submergence 4h gets final product in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 90%, is shown as inhibiter efficiently.
Embodiment 4
Pickle solution is a dilute hydrochloric acid, concentration is 1M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 10g, 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 10g, at ambient temperature steel to be cleaned are immersed in that submergence 4h gets final product in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 91%, is shown as inhibiter efficiently.
Embodiment 5
Pickle solution is a dilute hydrochloric acid, and concentration is 0.8M, and pickle solution consumption 100L adds 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3, and 4-triazole 35g is immersed in 4h in the pickle solution with steel to be cleaned at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 96%, is shown as inhibiter efficiently.
Embodiment 6
Pickle solution is a dilute hydrochloric acid, concentration is 0.8M, pickle solution consumption 100L adds 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole, 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 20g and 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 20g, at ambient temperature steel to be cleaned are immersed in submergence 4h in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 93%, is shown as inhibiter efficiently.
Embodiment 7
Pickle solution is a dilute sulphuric acid, and concentration is 0.1M, pickle solution consumption 100L, add 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3,4-oxadiazoles } sulfane base ethyl ketone 15g, at ambient temperature steel to be cleaned are immersed in that submergence 3h gets final product in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 94%, is shown as inhibiter efficiently.
Embodiment 8
Pickle solution is a dilute sulphuric acid, concentration is 0.1M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 20g and 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 15g, at ambient temperature steel to be cleaned are immersed in that submergence 3h gets final product in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 93%, is shown as inhibiter efficiently.
Embodiment 9
Pickle solution is a dilute sulphuric acid, and concentration is 0.1M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 20g is immersed in steel to be cleaned that submergence 3h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 91%, is shown as inhibiter efficiently.
Embodiment 10
Pickle solution is a dilute sulphuric acid, and concentration is 0.5M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 35g is immersed in steel to be cleaned that submergence 3h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 97%, is shown as inhibiter efficiently.
Embodiment 11
Pickle solution is a dilute sulphuric acid, concentration is 0.5M, pickle solution consumption 100L, add 1-amino-2-mercapto phenyl formic-5-[1 '-(1 ' 2 ' 4 '-triazole)-methylene radical-1H-1,3,4-triazole 15g and 1-benzene-2-{5-[1 ' 2 ' 3 ' 5 '-tetrazolium-methylene radical]-1,3, the 4-oxadiazoles } sulfane base ethyl ketone 20g, at ambient temperature steel to be cleaned are immersed in that submergence 3h gets final product in the pickle solution.
The highest inhibition efficiency that obtains by experimental test is 96%, is shown as inhibiter efficiently.
Claims (5)
1. oxadiazoles carbon steel restrainer, it is characterized in that: described inhibiter composition is 1-amino-2-mercapto phenyl formic-5-[1'-(1'2'4'-triazole)-methylene radical-1H-1,3,4-triazole, 1-benzene-2-{5-[1'2'3'5'-tetrazolium-methylene radical]-1,3,4-oxadiazoles } one or both combination of sulfane base ethyl ketone.
2. according to the described oxadiazoles carbon steel restrainer of claim 1, it is characterized in that:
When described inhibiter was the combination of two kinds of triazole compounds, by weight compound proportion was between them: (1-100): (1-100).
3. the application of the described oxadiazoles carbon steel restrainer of claim 1, it is characterized in that: described inhibiter is used to clean steel, described inhibiter composition is 1-amino-2-mercapto phenyl formic-5-[1'-(1'2'4'-triazole)-methylene radical-1H-1,3,4-triazole, 1-benzene-2-{5-[1'2'3'5'-tetrazolium-methylene radical]-1,3,4-oxadiazoles } one or both combination of sulfane base ethyl ketone.
4. according to the application of the described oxadiazoles carbon steel restrainer of claim 3, it is characterized in that: when described inhibiter was the combination of two kinds of triazole compounds, by weight compound proportion was between them: (1-100): (1-100).
5. according to the application of the described oxadiazoles carbon steel restrainer of claim 3, it is characterized in that: clean steel with the pickle solution submergence that is added with the triazole class inhibiter, the amount that adds inhibiter in every liter of acid solution is 0.001g-2.0g, and the submergence temperature is a room temperature, and the time is 1-4h;
Wherein: acid solution is dilute hydrochloric acid or dilute sulphuric acid, and concentration is 0.1mol/L-1mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710016267XA CN101368271A (en) | 2007-08-17 | 2007-08-17 | Green triazole carbon steel restrainer and use thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710016267XA CN101368271A (en) | 2007-08-17 | 2007-08-17 | Green triazole carbon steel restrainer and use thereof |
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| CN101368271A true CN101368271A (en) | 2009-02-18 |
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| CNA200710016267XA Pending CN101368271A (en) | 2007-08-17 | 2007-08-17 | Green triazole carbon steel restrainer and use thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113215581A (en) * | 2021-04-26 | 2021-08-06 | 威海海洋生物医药产业技术研究院有限公司 | Carbon steel pickling corrosion inhibitor of quinazoline-4- (3H) -ketone derivative |
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2007
- 2007-08-17 CN CNA200710016267XA patent/CN101368271A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113215581A (en) * | 2021-04-26 | 2021-08-06 | 威海海洋生物医药产业技术研究院有限公司 | Carbon steel pickling corrosion inhibitor of quinazoline-4- (3H) -ketone derivative |
| CN113215581B (en) * | 2021-04-26 | 2023-01-20 | 威海海洋生物医药产业技术研究院有限公司 | Carbon steel pickling corrosion inhibitor of quinazoline-4- (3H) -ketone derivative |
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Open date: 20090218 |