CN113201740A - Green carbon steel corrosion inhibitor based on Bisflavanol - Google Patents
Green carbon steel corrosion inhibitor based on Bisflavanol Download PDFInfo
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- CN113201740A CN113201740A CN202110455346.0A CN202110455346A CN113201740A CN 113201740 A CN113201740 A CN 113201740A CN 202110455346 A CN202110455346 A CN 202110455346A CN 113201740 A CN113201740 A CN 113201740A
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- corrosion inhibitor
- carbon steel
- corrosion
- bisflavanol
- green
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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
- C23G1/063—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors heterocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
- C07D311/60—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with aryl radicals attached in position 2
- C07D311/62—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with aryl radicals attached in position 2 with oxygen atoms directly attached in position 3, e.g. anthocyanidins
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/07—Optical isomers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a Bisflavanol-based green carbon steel corrosion inhibitor, belonging to the technical field of metal corrosion prevention. The green corrosion inhibitor is a natural product of Bisflavanol, and can be used for preventing corrosion and consumption of carbon steel in the pickling process. Experiments prove that the corrosion inhibitor can form a compact film layer on the surface of the carbon steel, and the corrosion rate of the carbon steel is slowed down. The corrosion inhibitor is a natural plant extract, has the characteristics of environmental protection, natural source and no public nuisance, does not cause any pollution to the environment in the using or sewage discharge process, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of metal corrosion prevention, in particular to a Bisflavanol-based green carbon steel corrosion inhibitor.
Background
In many industrial processes, low carbon steel is widely used due to its low cost and easy operation, but it is easily corroded during its use, causing great safety threat and economic loss. The corrosion problem of carbon steel must be solved for service performance and commercial value. In the processes of acid washing, descaling and the like, the common acid is hydrochloric acid, although the corrosion of carbon steel cannot be completely prevented, appropriate measures can be taken to slow down the speed, and a corrosion inhibitor is added in a common method.
The traditional corrosion inhibitors used at present mainly comprise chromate-containing oxidative inorganic corrosion inhibitor compounds and organic phosphorus corrosion inhibitor compounds, most of the corrosion inhibitors have toxic and side effects, and the emission of the corrosion inhibitors can pollute the environment. Therefore, the development of a novel environment-friendly corrosion inhibitor with natural source and no toxicity and harm is imperative.
Disclosure of Invention
Aiming at the defects of the existing corrosion inhibitor, the invention aims to provide a green carbon steel corrosion inhibitor of Bisflavanol, which is green, environment-friendly and harmless to the environment and can effectively slow down the corrosion of carbon steel in hydrochloric acid.
In order to achieve the purpose, the invention adopts the following technical scheme:
a green carbon steel corrosion inhibitor based on Bisflavanol is characterized in that the corrosion inhibitor is formed by connecting biflavanol monomers through methylene, and the specific structure of the compound is as follows:
the Bisflavanol-based green carbon steel corrosion inhibitor can inhibit metal corrosion and consumption of carbon steel in the pickling process.
The application of the green carbon steel corrosion inhibitor based on the Bisflavanol is characterized in that the acid solution is 0.5-2 mol/L hydrochloric acid.
The preparation and application steps of the green carbon steel corrosion inhibitor based on the Bisflavanol of the invention are as follows:
(1) preparation of the Bisflavanol corrosion inhibitor: mixing 0.01-0.05 mmol of tetrabenzylcatechin with 0.01-0.05 mmol of paraformaldehyde, adding 0.003-0.01 equiv of chromium trifluoromethanesulfonate, and reacting at room temperature for 10-30 min. Dissolving the reaction product in a methanol/tetrahydrofuran mixed solvent, adding palladium hydroxide (1-10%) at room temperature, and stirring for reaction for 8-12 h. Concentrating the organic phase under reduced pressure, and purifying by column chromatography to obtain the Bisflavanol corrosion inhibitor;
(2) weighing 0.1-1.0 mM of the Bisflavanol corrosion inhibitor obtained in the step (1), fully dissolving the Bisflavanol corrosion inhibitor in hydrochloric acid solutions with different concentrations, and carrying out volume metering in a volumetric flask to 100 mL to obtain a test solution.
(3) And (3) at room temperature, performing a weight loss coupon experiment in the corrosion solution prepared in the step (2) to evaluate the corrosion inhibition performance.
Furthermore, the corrosion inhibitor Bisflavanol is prepared by the laboratory;
further, the acid solution is 0.5-2 mol/L dilute hydrochloric acid.
Further, the temperature is 30 ℃, and a carbon steel sample to be pickled is added into the mixed solution and immersed for 12 hours.
Compared with the prior art, the invention has the following positive and beneficial effects:
(1) the corrosion inhibitor is separated from the Ganacao beans for the first time, is a natural source extract, and is a green corrosion inhibitor which is nontoxic and harmless to the environment.
(2) Compared with the corrosion inhibitor synthesized chemically in the current market, the corrosion inhibitor synthesized by the laboratory by an efficient and convenient method can be automatically decomposed in natural environment, cannot cause pollution problem after use, is nontoxic and harmless to environment and organisms, accords with the development trend of environmental protection and green, and has good application prospect.
(3) The corrosion inhibitor is used for the corrosion prevention process of carbon steel, can effectively inhibit the corrosion and the excessive consumption of a carbon steel matrix in hydrochloric acid, has the outstanding advantages of low consumption, high efficiency and strong continuous action capability compared with the current common corrosion inhibitors, and can be repeatedly used.
Detailed Description
The present invention is further described in detail by the following examples, but the technical content of the examples is illustrative and not restrictive, and the scope of the present invention should not be limited thereby. Meanwhile, the experimental methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
Example 1
Diluted hydrochloric acid of 0.5 mol/L is used for preparing the solution with the concentration of 0.2 mM, 0.4 mM, 0.6 mM and 0 mM respectively8 Mm, 1.0 Mm solution. Carbon steel is cleaned at room temperature and is respectively immersed for 12 hours, and then a rotary hanging piece experiment is carried out. Meanwhile, a blank test without adding a corrosion inhibitor is carried out. According to the formula:
calculating the corrosion inhibition efficiency, wherein
In order to avoid the corrosion rate of the corrosion inhibitor,
the corrosion rate of the added corrosion inhibitor is shown.
The test steps are in accordance with relevant regulations of a spinning hanging sheet method for measuring the corrosion inhibition performance of the HG/T2159-91 water treatment agent.
Example 2
Diluted hydrochloric acid (1 mol/L) was used to prepare solutions having a concentration of 0.2 mM, 0.4 mM, 0.6 mM, 0.8 mM, and 1.0 mM, respectively. Carbon steel is cleaned at room temperature and is respectively immersed for 12 hours, and then a rotary hanging piece experiment is carried out. Meanwhile, a blank test without adding a corrosion inhibitor is carried out. According to the formula:
calculating the corrosion inhibition efficiency, wherein
In order to avoid the corrosion rate of the corrosion inhibitor,
the corrosion rate of the added corrosion inhibitor is shown.
Example 3
Diluted hydrochloric acid (2 mol/L) was used to prepare solutions having a concentration of 0.2 mM, 0.4 mM, 0.6 mM, 0.8 mM, and 1.0 mM, respectively. Carbon steel is cleaned at room temperature and is respectively immersed for 12 hours, and then a rotary hanging piece experiment is carried out. Meanwhile, a blank test without adding a corrosion inhibitor is carried out. According to the formula:
calculating the corrosion inhibition efficiency, wherein
In order to avoid the corrosion rate of the corrosion inhibitor,
the corrosion rate of the added corrosion inhibitor is shown.
The corrosion inhibition rate of the above 3 examples on carbon steel in acidic solution is shown in the following table:
table 1 example 1
Table 2 example 2
Table 3 example 3
Claims (3)
1. A green carbon steel corrosion inhibitor based on Bisflavanol is characterized in that the corrosion inhibitor is formed by connecting biflavanol monomers through methylene, and the specific structure of the compound is as follows:
2. the Bisflavanol-based green carbon steel corrosion inhibitor according to claim 1, wherein the corrosion inhibitor is capable of inhibiting metal corrosion and consumption of carbon steel during pickling.
3. The use of the Bisflavanol-based green carbon steel corrosion inhibitor according to claim 2, wherein the acid solution is 0.5-2 mol/L hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455346.0A CN113201740A (en) | 2021-04-26 | 2021-04-26 | Green carbon steel corrosion inhibitor based on Bisflavanol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455346.0A CN113201740A (en) | 2021-04-26 | 2021-04-26 | Green carbon steel corrosion inhibitor based on Bisflavanol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113201740A true CN113201740A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110455346.0A Withdrawn CN113201740A (en) | 2021-04-26 | 2021-04-26 | Green carbon steel corrosion inhibitor based on Bisflavanol |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070004796A1 (en) * | 2005-06-29 | 2007-01-04 | Romanczyk Leo Jr | Processes for the preparation of protected-(+)-catechin and (-)-epicatechin monomers, for coupling the protected monomers with an activated, protected epicatechin monomer, and for the preparation of epicatechin-(4B,8)-epicatechin or -catechin dimers and their digallates |
| JP2007039776A (en) * | 2005-08-05 | 2007-02-15 | Taiyo Kagaku Co Ltd | Coated metal treated with catechin and catechin derivative |
| CN103857665A (en) * | 2011-08-09 | 2014-06-11 | 雀巢产品技术援助有限公司 | Synthesis of catechin and epicatechin conjugates |
| US20200140747A1 (en) * | 2016-12-13 | 2020-05-07 | Halliburton Energy Services, Inc. | Compositions and Methods for Corrosion Inhibition |
-
2021
- 2021-04-26 CN CN202110455346.0A patent/CN113201740A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070004796A1 (en) * | 2005-06-29 | 2007-01-04 | Romanczyk Leo Jr | Processes for the preparation of protected-(+)-catechin and (-)-epicatechin monomers, for coupling the protected monomers with an activated, protected epicatechin monomer, and for the preparation of epicatechin-(4B,8)-epicatechin or -catechin dimers and their digallates |
| JP2007039776A (en) * | 2005-08-05 | 2007-02-15 | Taiyo Kagaku Co Ltd | Coated metal treated with catechin and catechin derivative |
| CN103857665A (en) * | 2011-08-09 | 2014-06-11 | 雀巢产品技术援助有限公司 | Synthesis of catechin and epicatechin conjugates |
| US20200140747A1 (en) * | 2016-12-13 | 2020-05-07 | Halliburton Energy Services, Inc. | Compositions and Methods for Corrosion Inhibition |
Non-Patent Citations (3)
| Title |
|---|
| DENG-MING DUANG ET AL.: ""Synthesis of Bisflavanol-Type Natural Products and Their Analogues- via Self-Coupling of C8-Methylol Catechin Derivatives"", 《SYNTHESIS》 * |
| M. HAZWAN HUSSIN ET AL.: ""The corrosion inhibition and adsorption behavior of Uncaria gambir extract on mild steel in 1M HCl"", 《MATERIALS CHEMISTRY AND PHYSICS》 * |
| 黄登明: ""苯并吡喃类天然产物及其类似物的合成研究"" * |
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