CN101892485B - Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater - Google Patents
Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater Download PDFInfo
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- CN101892485B CN101892485B CN2010102026718A CN201010202671A CN101892485B CN 101892485 B CN101892485 B CN 101892485B CN 2010102026718 A CN2010102026718 A CN 2010102026718A CN 201010202671 A CN201010202671 A CN 201010202671A CN 101892485 B CN101892485 B CN 101892485B
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- corrosion
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- corrosion inhibitor
- sodium chloride
- azoles alcohol
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Abstract
The invention relates to a corrosion inhibitor for copper in seawater or sodium chloride solution, namely a low-toxicity and high-efficiency corrosion inhibitor used for inhibiting the corrosion of metallic copper and products thereof in the seawater or a sodium chloride medium and application thereof. The corrosion inhibitor has an active component of hexaconazole (alias: (RS)-2-(2,4-dichlorophenyl)-1-(1H-1,2,4-triazole)-1-yl)-hexyl-2-alcohol). The product can prevent the general corrosion and the local corrosion of the metallic cupper in the process of contacting the seawater or the sodium chloride solution. At present, the compound has been industrially produced on a large scale, and has been widely applied to agricultural production, but the compound has not been used as a metal corrosion inhibitor. The corrosion inhibitor has the advantages of low use level, low toxicity, high efficiency, strong lasting action, effective inhibition of corrosion and damage of the metallic cupper and wide application prospect.
Description
Technical field
The present invention relates to the corrosion inhibitor of sea water of copper, promptly in order to suppress metallic copper and a kind of low toxicity of the corrosive of goods in seawater or sodium chloride medium thereof, heterocyclic alcohol inhibiter and application thereof efficiently.
Background technology
Along with the continuous consumption of the various resources in land, the development and utilization oceanic resources become the inevitable approach that solves current resource exhaustion.But seawater belongs to strong electrolyte solution, has intensive corrodibility, has limited the development and utilization of oceanic resources dramatically.Therefore, have only to have solved the etching problem of metallic substance in seawater, could really embody the development and utilization of marine resources and be worth.
Copper has characteristics such as good physical strength, workability, electroconductibility, thermal conductivity, weldability, is used widely in industry, field such as military and civilian for a long time.Yet, though copper comes hydrogen in metal reactivity sequence list after, activity is relatively poor; But copper is in containing corrosive medium systems such as cl ions, vitriol, nitrate salt; Also very easily receive corrosion failure in various degree, thereby lose its original various performances, even bring huge disaster.
At present; Though having been arranged, many bibliographical informations cross the corrosion inhibitor of sea water of metallic copper; But the inhibiter quantity that can be applied in the actual production is but very rare; Major part is still continued to use traditional benzotriazole compound as copper inhibitor, brings a series of economy and environmental problem to production process.Consumption of the present invention is low, efficient is high, weather resistance is strong, low toxic and environment-friendly, and wide material sources have vast market prospect and using value.
Summary of the invention
The object of the present invention is to provide a kind of low toxicity, environmental protection, effective constituent is heterocyclic alcohol compound inhibiter efficiently, in order to suppress metallic copper and the corrosion of goods in seawater or sodium chloride medium thereof.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater, said inhibiter effective constituent be own azoles alcohol [another name: (RS)-2-(2,4 dichloro benzene base)-1-(1H-1,2,4-triazol-1-yl)-oneself-2-alcohol].
Said inhibiter is used for seawater or concentration is the copper of 0.1%-5% (weight) sodium chloride medium and the corrosion prevention of goods thereof, before using own azoles alcohol is mixed with 2%-5% (weight) microemulsion, to guarantee that fully dissolving disperses.The amount that contains own azoles alcohol when using in every liter of medium is 0.5-50mg, and the submergence temperature is (10-60 a ℃), and the pH scope is 5.0-9.0, and inhibition efficiency can reach 80%-99%.
The invention has the beneficial effects as follows:
1. cost is low.Inhibiter effective constituent of the present invention is own azoles alcohol, in industrial or agricultural, is widely used, and is cheap, and it is convenient to buy.
2. low toxic and environment-friendly.Inhibiter of the present invention is compared with traditional organic copper inhibiter with inorganic copper inhibitor commonly used at present, and natural degradation is nontoxic or low toxicity material in the sun, can not bring load to environment, meets the green corrosion inhibitor Development Trend.
3. suitability is strong.Inhibiter of the present invention applied widely all has good corrosion inhibition under different salinity, temperature, pH.
4. high efficiency.The present invention adds a spot of inhibiter just can effectively suppress the destruction of metallic copper in corrosive medium.
5. good endurance.Inhibiter of the present invention has good weather resistance, can keep higher corrosion inhibition for a long time.
Embodiment
The present invention carries out zero-G test according to GB10124-88 " metallic substance laboratory uniform corrosion total immersion test method ".And adopt electrochemical impedance spectroscopy and two kinds of electrochemical methods of electrokinetic potential polarization to carry out the corrosion inhibition sign.Though the inhibition efficiency that three kinds of methods obtain has certain difference; Mainly be since weight-loss method test be average corrosion rate; Electrochemical method is tested instantaneous erosion rate, but the general trend of the whole bag of tricks is consistent, can find out that this compound all has good corrosion inhibition under different condition.
Embodiment 1
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.05g, and temperature is 25 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 86.9%, and electrochemical impedance spectroscopy 86.7%, electrokinetic potential polarization 91.2% is shown as the inhibiter that consumption is low, efficient is high.
Embodiment 2
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.06g, and temperature is 25 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 91.2%, and electrochemical impedance spectroscopy 90.6%, electrokinetic potential polarization 92.8% is shown as the inhibiter that consumption is low, efficient is high.
Embodiment 3
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.08g, and temperature is 25 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 93.4%, and electrochemical impedance spectroscopy 93.8%, electrokinetic potential polarization 95.4% is shown as the inhibiter that consumption is low, efficient is high.
Embodiment 4
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.1g, and temperature is 25 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 95.8%, and electrochemical impedance spectroscopy 97.2%, electrokinetic potential polarization 97.7% is shown as the inhibiter that consumption is low, efficient is high.
Embodiment 5
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, and consumption 100L adds own azoles alcohol effective content for o.15g, and temperature is 25 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 96.8%, and electrochemical impedance spectroscopy 98.7%, electrokinetic potential polarization 98.5% is shown as the inhibiter that consumption is low, efficient is high.
Embodiment 6
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.06g, and temperature is 25 ℃, and pH=5.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 77.1%, and electrochemical impedance spectroscopy 67.1%, electrokinetic potential polarization 74.7% is shown as high-level efficiency inhibiter under the acidic conditions.
Embodiment 7
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.06g, and temperature is 25 ℃, and pH=6.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 86.9%, and electrochemical impedance spectroscopy 87.3%, electrokinetic potential polarization 90.3% is shown as high-level efficiency inhibiter under the acidic conditions.
Embodiment 8
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.06g, and temperature is 25 ℃, and pH=8.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 81.2%, and electrochemical impedance spectroscopy 68.3%, electrokinetic potential polarization 87.2% is shown as high-level efficiency inhibiter under the alkaline condition.
Embodiment 9
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.15g, and temperature is 35 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 96.7%, and electrochemical impedance spectroscopy 97.6%, electrokinetic potential polarization 99.0% demonstrates corrosion inhibition good under the differing temps.
Embodiment 10
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.15g, and temperature is 45 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 92.3%, and electrochemical impedance spectroscopy 93.1%, electrokinetic potential polarization 95.5% demonstrates corrosion inhibition good under the differing temps.
Embodiment 11
Condition: experiment material is red copper (99.999%), and own azoles alcohol is mixed with microemulsion with emulsifying agent, and medium is 3.5% sodium chloride solution, consumption 100L, and adding own azoles alcohol effective content is 0.15g, and temperature is 55 ℃, and pH=7.5, Immersion time are 20 days.
Obtaining inhibition efficiency through experimental test is respectively: weightlessness 92.4%, and electrochemical impedance spectroscopy 94.2%, electrokinetic potential polarization 95.9% demonstrates corrosion inhibition good under the differing temps.
Claims (1)
1. the application of a heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater is characterized in that: said inhibiter effective constituent be own azoles alcohol [another name: (RS)-2-(2,4 dichloro benzene base)-1-(1H-1,2,4-triazol-1-yl)-oneself-2-alcohol], its structural formula is following:
Said inhibiter is used for seawater or concentration is the copper of 0.1 weight %-5 weight % sodium chloride medium and the corrosion prevention of goods thereof; Before using own azoles alcohol is mixed with 2 weight %-5 weight % microemulsions; Guaranteeing that fully dissolving disperses, the amount that contains own azoles alcohol when using in every liter of medium is 0.5-50mg, and the submergence temperature is 10-60 ℃; The pH scope is 5.0-9.0, and inhibition efficiency can reach 80%-99%.
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| CN2010102026718A CN101892485B (en) | 2010-06-18 | 2010-06-18 | Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater |
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| CN2010102026718A CN101892485B (en) | 2010-06-18 | 2010-06-18 | Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater |
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| CN101892485A CN101892485A (en) | 2010-11-24 |
| CN101892485B true CN101892485B (en) | 2012-07-04 |
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| CN101530080A (en) * | 2008-03-14 | 2009-09-16 | 北京绿色农华植保科技有限责任公司 | Preparation method of hexaconazole microemulsion |
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