CN102181870B - Application of efficient copper seawater corrosion inhibitor - Google Patents
Application of efficient copper seawater corrosion inhibitor Download PDFInfo
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- CN102181870B CN102181870B CN 201110089587 CN201110089587A CN102181870B CN 102181870 B CN102181870 B CN 102181870B CN 201110089587 CN201110089587 CN 201110089587 CN 201110089587 A CN201110089587 A CN 201110089587A CN 102181870 B CN102181870 B CN 102181870B
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- acetate
- methyl
- thiadiazoles
- sulfydryl
- inhibiter
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Abstract
The invention relates to application of a copper seawater corrosion inhibitor. The copper seawater corrosion inhibitor can be used for inhibiting the corrosion of copper in seawater. The inhibitor is prepared by dissolving (5-methyl-[1,3,4] thiadiazole-2-mercapto)-acetic acid (4-N,N dimethyl amino-benzylidene)-hydrazide in a solvent, and then compounding with an emulsifying agent. The inhibitor provided by the invention is low in toxicity and is efficient and environment-friendly.
Description
Technical field
The present invention relates to a kind of application of copper seawater corrosion inhibitor, be meant a kind of environmental protection, thiazoles inhibiter efficiently especially.
Background technology
Seawater has intensive corrodibility to copper; Suppressed the application of brass work in the ocean exploitation field; To such problem, human development goes out multiple copper seawater corrosion inhibitor, inorganic inhibitors such as for example the most frequently used nitrites, phosphoric acid salt, polyphosphoric acid salt, carbonate, silicates, borate family, chromate; And benzotriazole compound class organic inhibitor; But also there are a lot of weak points in the synthetic route of these inhibiter and technology, are difficult to satisfy environmental requirement, can't accomplish nontoxic, environmental protection, target cheaply.
Along with the mankind's the attention and the further propelling of Green Chemical Technology; The development and application of environmentally friendly inhibiter has obtained the development of advancing by leaps and bounds; But still face a large amount of urgent problems, as have that consumption is big, toxicity is big, production process is supervened the big defectives such as industrial by-products of hazardness.
Summary of the invention
The objective of the invention is to solve an above-mentioned difficult problem; The application of a kind of thiazole compound as copper seawater corrosion inhibitor is provided, and this molecular structure of compounds is reasonable in design, and inhibition efficiency is high; And natural degradation is nontoxic or low toxicity material in the sun, is a kind of environmentally friendly inhibiter.
The technical scheme that the present invention adopted is following:
A kind of application of efficient copper seawater corrosion inhibitor; Thiazole compound wherein; (5-methyl-[1; 3; 4] thiadiazoles-2-sulfydryl)-acetate; (4-N; N dimethyl amine-Ben Yajiaji)-hydrazides
is the staple of inhibiter
With 10 gram (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N; N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the 250-500 gram solvent; In mixing solutions, add 200-500 gram emulsifying agent then, stir fully dissolving under the room temperature and disperse, mix obtaining the inhibiter microemulsion; During use the inhibiter microemulsion directly is added in the residing briny environment of copper; Contain (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N in every liter of seawater; N dimethyl amine-Ben Yajiaji)-amount of hydrazides is 0.5-50 mg; The submergence temperature is 10-40 ℃, and the pH scope is 5.0-9.0, and inhibition efficiency can reach 88%-97%.
Employed solvent can be preferably pimelinketone for ETHYLE ACETATE, pimelinketone or THF; Used emulsifying agent is a TX10 class emulsifying agent, like NP series, serial, hot No. 10 emulsifying agents of phosphorus of OP, preferably uses OP-10.
The synthetic route of core inhibition ingredient of the present invention (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is following:
Embodiment
The corrosion inhibition judgement criteria:
1, GB10124-88 " metallic substance laboratory uniform corrosion total immersion test method " carries out zero-G test;
2, two kinds of electrochemical methods of electrochemical impedance spectroscopy and electrokinetic potential polarization carry out the corrosion inhibition sign.
Embodiment 1
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 0.5mg, control pH value was 7.5,25 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 87.2%, electrochemical impedance spectroscopy 83.6%, electrokinetic potential polarization 90.4%.
Embodiment 2
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 50mg, control pH value was 7.5,25 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 93.2%, electrochemical impedance spectroscopy 92.8%, electrokinetic potential polarization 97.0%.
Embodiment 3
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 1mg, control pH value was 8.5,15 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 89.4%, electrochemical impedance spectroscopy 88.5%, electrokinetic potential polarization 91.9%.
Embodiment 4
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 10mg, control pH value was 5.5,40 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 92.2%, electrochemical impedance spectroscopy 93.4%, electrokinetic potential polarization 94.7%.
Embodiment 5
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 10mg, control pH value was 5.0,40 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 89.9%, electrochemical impedance spectroscopy 91.5%, electrokinetic potential polarization 92.4%.
Embodiment 6
(5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the cyclohexanone solvent, then with the composite inhibiter microemulsion of processing of emulsifying agent op-10.Copper sheet is immersed in the 1L seawater, add above-mentioned inhibiter microemulsion, make (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides content reach 10mg, control pH value was 9.0,40 ℃ of following submergences 72 hours.
Observation copper sheet surface, evenly obviously corrosion does not appear in light; Through the experimental test inhibition efficiency: weightless 87.4%, electrochemical impedance spectroscopy 90.5%, electrokinetic potential polarization 90.9%.
Claims (1)
1. the application of a copper seawater corrosion inhibitor, wherein the staple of inhibiter is (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N; N dimethyl amine-Ben Yajiaji)-hydrazides, with 10 gram (5-methyl-[1,3; 4] thiadiazoles-2-sulfydryl)-and acetate (4-N, N dimethyl amine-Ben Yajiaji)-hydrazides is dissolved in the 250-500 gram solvent, and add 200-500 in the mixing solutions then and restrain emulsifying agent; Stir fully dissolving under the room temperature and disperse, mix obtaining the inhibiter microemulsion, the inhibiter microemulsion directly is added in the residing briny environment of copper; Contain (5-methyl-[1,3,4] thiadiazoles-2-sulfydryl)-acetate (4-N in every liter of seawater; N dimethyl amine-Ben Yajiaji)-and the amount of hydrazides is 0.5-50 mg, and the submergence temperature is 10-40 ℃, and the pH scope is 5.0-9.0; Inhibition efficiency reaches 88%-97%, and said solvent is ETHYLE ACETATE, pimelinketone or THF, and used emulsifying agent is a TX10 class emulsifying agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089587 CN102181870B (en) | 2011-04-11 | 2011-04-11 | Application of efficient copper seawater corrosion inhibitor |
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| CN 201110089587 CN102181870B (en) | 2011-04-11 | 2011-04-11 | Application of efficient copper seawater corrosion inhibitor |
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| CN102181870A CN102181870A (en) | 2011-09-14 |
| CN102181870B true CN102181870B (en) | 2012-12-05 |
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| CN102219757B (en) * | 2011-05-11 | 2013-05-15 | 中国科学院海洋研究所 | Thiazole heterocyclic compound as well as preparation and application thereof |
| CN102432564B (en) * | 2011-10-28 | 2014-02-12 | 中国科学院海洋研究所 | Disubstituted thiadiazole compound, preparation method and application thereof |
| CN103388152B (en) * | 2013-07-04 | 2016-04-20 | 电子科技大学 | A kind of Copper base material pickle solution with corrosion mitigating effect |
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| AU2002324326A1 (en) * | 2002-07-25 | 2004-02-16 | Indian Oil Corporation Limited | Corrosion inhibitor/metal passivator additive composition from waste refinery streams |
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Non-Patent Citations (2)
| Title |
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| 朱江丽等.噻二唑类衍生物的合成及应用进展.《化学工业与工程技术》.2011,第32卷(第1期),32-34. * |
| 王国瑞等.绿色缓蚀剂研究现状与展望.《腐蚀与防护》.2009,第30卷(第10期),732-737. * |
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| CN102181870A (en) | 2011-09-14 |
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Effective date of registration: 20130718 Address after: The food market three factory town 79 road 226121 Jiangsu city of Nantong Province Patentee after: Nantong seven Tourism Development Co., Ltd. Address before: 266061 phase 12-2-402, Li Hai garden, Laoshan District, Shandong, Qingdao Patentee before: Li Dianchang |
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