CN101994124A - Heterocyclic carbon steel pickling corrosion inhibitor and application thereof - Google Patents
Heterocyclic carbon steel pickling corrosion inhibitor and application thereof Download PDFInfo
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- CN101994124A CN101994124A CN2009100179557A CN200910017955A CN101994124A CN 101994124 A CN101994124 A CN 101994124A CN 2009100179557 A CN2009100179557 A CN 2009100179557A CN 200910017955 A CN200910017955 A CN 200910017955A CN 101994124 A CN101994124 A CN 101994124A
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- carbon steel
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Abstract
The invention discloses a carbon steel pickling corrosion inhibitor and application thereof, wherein the carbon steel corrosion inhibitor is used for preventing unnecessary corrosion on carbon steel and products thereof and unnecessary acid liquor consumption in a pickling process. The corrosion inhibitor is a heterocyclic compound and is one or combination of 2,3,5-triphenyl-dihydro-tetrazole and 2,4,6-tri(2-pyridyl)-trizaine. In the application of the corrosion inhibitor, a cleanout fluid is diluted hydrochloric acid or diluted sulphuric acid with the concentration of 0.10-1.0kmol/m<3>, 0.010-3.0kg/m<3> of cleaning agent is added, the temperature is controlled to be around 25 DEG C, and the carbon steel and products thereof are added and soaked for 30min-4h. The product is used for cleaning the surface of the carbon steel and the products thereof, can prevent over etching of metal and over consumption of the acid liquor in the cleaning process, and has the remarkable advantages of low consumption, high efficiency and strong continuous acting capability.
Description
Technical field
The present invention relates to the production of inhibiter, specifically efficient carbon steel pickling corrosion inhibitor of a kind of heterocyclic and application thereof in order to prevent that carbon steel and goods thereof unnecessary corrosion and acid solution in acid cleaning process from consuming.
Background technology
Steel are used more and more widely, in its product processing and application process, dilute sulphuric acid commonly used or dilute hydrochloric acid carry out surface cleaning, to remove the oxide film or the corrosion product on surface, because strong acid all has corrosive nature to hardware, " crossing erosion " phenomenon often appears in the acid cleaning process, and this process both can cause Corrosion of Metallic Materials, produced simultaneously a large amount of acid solution does great damage to environment.Harmful corrosive that consumes excessively and prevent of metal or acid takes place in the acid cleaning process, adds the clean-out system with corrosion inhibition and be economic, effective means in acid.The use of inhibiter can effectively suppress the corrosion of metal in acidic medium, reduces the usage quantity of acid, improves pickling effect, prolongs service life of equipment, thereby is widely used in industrial sectors such as chemical industry, oil, the energy, traffic, electromechanics, building.
In the clean-out system commonly used at present, mainly comprise deleterious inorganic inhibition compounds such as chromic salt, nitrate, nitrite, and some organophosphor compounds, its discharging may cause the eutrophication of water body, the clean-out system of existing same domain mostly has toxic side effect, do not possess the market competitiveness, the global environmental requirement of incompatibility.
Along with the enhancing of human environment protection consciousness and going deep into of the idea of sustainable development; development and application to inhibiter has proposed new requirement, and around the research and development of performance and economic goal environment not being constituted destruction is the developing direction that the environmental friendliness inhibiter becomes following inhibiter.Therefore, develop new efficiently, the clean-out system of environmental protection becomes the new direction of exploitation.
Summary of the invention
The purpose of this invention is to provide carbon steel pickling corrosion inhibitor and application thereof that a kind of available in case blocking steel and goods thereof unnecessary corrosion and acid solution in acid cleaning process consume.
For achieving the above object, technical scheme of the present invention is:
The effective constituent of inhibiter is heterocyclic compound, and described compound is: 2,3, and 5-triphenyl-2 hydrogen-tetrazolium and 2,4, the mixing of a kind of in the heterocyclic compound of 6-three (2-pyridyl)-triazine or two kinds.
The inhibiter combined composition is: 2,3, and when 5-triphenyl-2 hydrogen-tetrazolium and 2,4,6-three (2-pyridyl)-triazine, its compound proportion by weight is: (1-100): (1-100).
Scavenging solution is an acid solution, and the amount that adds inhibiter in every liter of acid solution is 0.001g-3.0g, adds carbon steel and goods thereof to be cleaned, and the submergence temperature is a room temperature, and the time is 0.5-4h;
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: 2,3, and 5-triphenyl-2 hydrogen-tetrazolium, 2,4,6-three (2-pyridyl)-triazine is to have atom or atomic groups such as phenyl ring, tetraazacyclododecane, pyridyl, triazinyl, can be adsorbed in steel surface effectively, plays corrosion inhibition.
Product of the present invention is used for the surface cleaning of carbon steel and products thereof, can prevent the excessive etch of metal and consuming excessively of acid solution in cleaning process, has the outstanding advantage that consumption is low, efficient is high, continuous action ability is strong.
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 0.1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 30g or 2,4, and 6-three (2-pyridyl)-triazine 30g is immersed in steel to be cleaned that 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 96%/98%, is shown as clean-out system efficiently.
Embodiment 2
Pickle solution is a dilute hydrochloric acid, and concentration is 0.1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 15g and 2,4, and 6-three (2-pyridyl)-triazine 15g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 97%, is shown as clean-out system efficiently.
Embodiment 3
Pickle solution is a dilute hydrochloric acid, and concentration is 0.5M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 30g or 2,4, and 6-three (2-pyridyl)-triazine 30g is immersed in steel to be cleaned that 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 90%/95%, is shown as clean-out system efficiently.
Embodiment 4
Pickle solution is a dilute hydrochloric acid, and concentration is 0.5M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 15g and 2,4, and 6-three (2-pyridyl)-triazine 15g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 92%, is shown as clean-out system efficiently.
Embodiment 5
Pickle solution is a dilute hydrochloric acid, and concentration is 1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 30g or 2,4, and 6-three (2-pyridyl)-triazine 30g is immersed in steel to be cleaned that submergence 2h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 92%/90%, is shown as clean-out system efficiently.
Embodiment 6
Pickle solution is a dilute hydrochloric acid, and concentration is 1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 20g and 2,4, and 6-three (2-pyridyl)-triazine 20g is immersed in steel to be cleaned that submergence 2h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 90%, is shown as clean-out system efficiently.
Embodiment 7
Pickle solution is a dilute sulphuric acid, and concentration is 0.1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 20g or 2,4, and 6-three (2-pyridyl)-triazine 20g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 96%/89%, is shown as clean-out system efficiently.
Embodiment 8
Pickle solution is a dilute sulphuric acid, and concentration is 0.1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 15g and 2,4, and 6-three (2-pyridyl)-triazine 15g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 92%, is shown as clean-out system efficiently.
Embodiment 9
Pickle solution is a dilute sulphuric acid, and concentration is 0.8M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 40g or 2,4, and 6-three (2-pyridyl)-triazine 40g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 90%/94%, is shown as clean-out system efficiently.
Embodiment 10
Pickle solution is a dilute sulphuric acid, and concentration is 0.8M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 20g and 2,4, and 6-three (2-pyridyl)-triazine 20g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 92%, is shown as clean-out system efficiently.
Embodiment 11
Pickle solution is a dilute sulphuric acid, and concentration is 1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 40g or 2,4, and 6-three (2-pyridyl)-triazine 40g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 88%/91%, is shown as clean-out system efficiently.
Embodiment 12
Pickle solution is a dilute sulphuric acid, and concentration is 1M, and pickle solution consumption 100L adds 2,3,5-triphenyl-2 hydrogen-tetrazolium 20g and 2,4, and 6-three (2-pyridyl)-triazine 20g is immersed in steel to be cleaned that submergence 4h gets final product in the pickle solution at ambient temperature.
The highest inhibition efficiency that obtains by experimental test is 89%, is shown as clean-out system efficiently.
Claims (4)
1. heterocycle carbon steel pickling corrosion inhibitor, its feature: its activeconstituents is 2,3,5-triphenyl-2 hydrogen-tetrazolium, 2,4, the mixing of a kind of in 6-three (2-pyridyl)-triazine or two kinds.
2. according to the described carbon steel pickling corrosion inhibitor of claim 1, it is characterized in that: described inhibiter is 2,3,5-triphenyl-2 hydrogen-tetrazolium and 2,4, the two the mixing of 6-three (2-pyridyl)-triazine, its compound proportion by weight is (1-100): (1-100).
3. the application of right 1 a described carbon steel pickling corrosion inhibitor is characterized in that: adopts and contains 2,3, and 5-triphenyl-2 hydrogen-tetrazolium, 2,4, steel are cleaned in the scavenging solution submergence of a kind of or two kinds of heterocyclic compound inhibiter in 6-three (2-pyridyl)-triazine.
4. by the application of the described carbon steel pickling corrosion inhibitor of claim 3, it is characterized in that: scavenging solution is an acid solution, and the amount that adds inhibiter in the acid solution is 0.001g-3.0g/L, and the submergence temperature is a room temperature, and the time is 0.5-4h;
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 |
|---|---|---|---|
| CN2009100179557A CN101994124A (en) | 2009-08-21 | 2009-08-21 | Heterocyclic carbon steel pickling corrosion inhibitor and application thereof |
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| CN2009100179557A CN101994124A (en) | 2009-08-21 | 2009-08-21 | Heterocyclic carbon steel pickling corrosion inhibitor and application thereof |
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| CN101994124A true CN101994124A (en) | 2011-03-30 |
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| CN2009100179557A Pending CN101994124A (en) | 2009-08-21 | 2009-08-21 | Heterocyclic carbon steel pickling corrosion inhibitor and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233235A (en) * | 2013-05-16 | 2013-08-07 | 广东工业大学 | Industrial pickling assistant and application thereof |
| CN110129807A (en) * | 2019-05-23 | 2019-08-16 | 电子科技大学 | It is a kind of for copper/iron-based material restrainer and pickling solution |
| CN115403537A (en) * | 2022-09-02 | 2022-11-29 | 武汉工程大学 | 2,3,5-trisubstituted-2,3-dihydro-oxatriazole derivative and preparation method thereof |
-
2009
- 2009-08-21 CN CN2009100179557A patent/CN101994124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233235A (en) * | 2013-05-16 | 2013-08-07 | 广东工业大学 | Industrial pickling assistant and application thereof |
| CN110129807A (en) * | 2019-05-23 | 2019-08-16 | 电子科技大学 | It is a kind of for copper/iron-based material restrainer and pickling solution |
| CN115403537A (en) * | 2022-09-02 | 2022-11-29 | 武汉工程大学 | 2,3,5-trisubstituted-2,3-dihydro-oxatriazole derivative and preparation method thereof |
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Application publication date: 20110330 |