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Application of 1-myristyl-3-methylimidazolium chloride ionic liquid serving as steel corrosion inhibitor

A technology of methylimidazolium chloride salt and ionic liquid, which is applied in the field of corrosion inhibitors, can solve the problems of high toxicity and side effects, achieve good corrosion inhibition efficiency, compensate for large toxicity and side effects, and inhibit corrosion reactions

Inactive Publication Date: 2012-08-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a corrosion inhibitor, 1-tetradecyl-3-methylimidazolium chloride salt ionic liquid is environmentally friendly, has good solubility, and has a good slow-release effect in a strong acid environment, which solves the problem of large toxic and side effects of existing corrosion inhibitors

Method used

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  • Application of 1-myristyl-3-methylimidazolium chloride ionic liquid serving as steel corrosion inhibitor
  • Application of 1-myristyl-3-methylimidazolium chloride ionic liquid serving as steel corrosion inhibitor
  • Application of 1-myristyl-3-methylimidazolium chloride ionic liquid serving as steel corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of 1-tetradecyl-3-methylimidazolium chloride salt is as follows:

[0018] (1) Weigh 23.2g (0.1mol) of n-tetradecane chloride and 8.21g (0.1mol) of N-methylimidazole, put them into a conical flask (250mL), adjust the power of the microwave oven to 210W, and heat up to Reaction temperature (90-100°C), the heating method is intermittent heating, heating once every 10s, heating for 30s each time, and repeating this cycle until yellow layering occurs and then stop heating;

[0019] (2) The reaction solution is cooled at normal temperature, and becomes a yellow solid after a period of time;

[0020] (3) Dissolve the solid completely with acetone, then freeze in the refrigerator for about 30 minutes (5°C), and then suction filter;

[0021] (4) Step (3) was repeated three times to obtain a white powder, which was then dried in a vacuum oven at 30° C. for 12 hours to obtain a pure sample.

[0022] The corrosion inhibition performance of the product of th...

Embodiment 1

[0041] Add 0.01g / L, 0.1g / L, and 1.0g / L corrosion inhibitors to 1L of dilute sulfuric acid with a concentration of 0.1mol / L, and then add the experimental test piece—iron piece to carry out the weight loss test of the hanging piece, with 0.1 mol / L dilute sulfuric acid solution was used as the control. The soaking temperature is 25°C, and the soaking time is 4 hours. The results are as follows:

[0042] Numbering

Weight loss (Δm / g)

Corrosion inhibition efficiency (%)

a

0.0445

/

b

0.0049

89

c

0.0040

91

d

0.0035

92.1

[0043] Among them, a.0.1mol / L sulfuric acid;

[0044] b.0.1mol / L sulfuric acid+0.01g / L 1-tetradecyl-3-methylimidazolium chloride;

[0045] c.0.1mol / L sulfuric acid+0.1g / L 1-tetradecyl-3-methylimidazolium chloride;

[0046]d.0.1mol / L sulfuric acid+1.0g / L 1-tetradecyl-3-methylimidazolium chloride;

[0047] Add 0.01g / L, 0.1g / L, and 1.0g / L corrosion inhibitor...

Embodiment 2

[0049] Add 0.01g / L, 0.1g / L, and 1.0g / L corrosion inhibitors to 1L of dilute sulfuric acid with a concentration of 0.5mol / L, and then add the experimental test piece—iron piece to carry out the weight loss test of the hanging piece. mol / L dilute sulfuric acid solution was used as the control. The soaking temperature is 20°C, and the soaking time is 4 hours. The results are as follows:

[0050] Numbering

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Abstract

The invention discloses application of 1-myristyl-3-methylimidazolium chloride ionic liquid serving as a steel corrosion inhibitor. The method of the application comprises the step of: immersing steel in acid liquor containing the corrosion inhibitor of the 1-myristyl-3-methylimidazolium chloride ionic liquid to clean the steel. The invention has the advantages that the ionic liquid is used as the corrosion inhibitor and is extremely easy to dissolve in common solutions in production, such as water and the like, which is beneficial to the penetration in the use of the corrosion inhibitor; compared with common inorganic corrosion inhibitors, the corrosion inhibitor of the invention does not have toxic action on the environment and organisms and makes up the defect of big toxic and side effects on the traditional corrosion inhibitors. The corrosion inhibitor can effectively restrain the corrosion reaction of steel materials in acid media and has good corrosion inhibition efficiency.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors, and in particular relates to the application of a 1-tetradecyl-3-methylimidazolium chloride salt ionic liquid as a steel corrosion inhibitor. Background technique [0002] Steel is one of the most important building materials in modern times, widely used in sea, land and air transportation, bridges, vehicles, mechanical equipment, petrochemical industry, urban construction and many other fields. Steel generally needs to be washed with acid solution, which will inevitably corrode the steel material and cause waste. While steel corrosion affects the service life of equipment, it also causes safety hazards in production and life. It is particularly important to take effective measures to slow down and inhibit the occurrence of steel corrosion reactions. Adding corrosion inhibitors is an effective means that is easy to operate. application. [0003] Commonly used corrosion inhibitors are divide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/04
Inventor 郭文娟裴梅山潘奇伟赵琪王双平
Owner UNIV OF JINAN
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