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Imidazolyl lysine salt ionic liquid steel corrosion inhibitor and application thereof

A technology of azole lysine salt and imidazole lysine salt, which is applied in the field of ionic liquid steel corrosion inhibitor, can solve the problems of poor environmental friendliness, large toxic and side effects, poor biodegradation, etc., and achieves good corrosion inhibition effect and production efficiency. The effect of low cost and low vapor pressure

Inactive Publication Date: 2013-04-17
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a corrosion inhibitor, the imidazolium amino acid salt ionic liquid is environmentally friendly, has good solubility and biodegradability, and has a good corrosion inhibition effect in a strong acid environment. insufficient

Method used

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  • Imidazolyl lysine salt ionic liquid steel corrosion inhibitor and application thereof
  • Imidazolyl lysine salt ionic liquid steel corrosion inhibitor and application thereof
  • Imidazolyl lysine salt ionic liquid steel corrosion inhibitor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 The synthesis of three kinds of imidazolyl lysine salt ionic liquids, concrete steps are as follows:

[0032](1) Synthesis of intermediate - bromoimidazole quaternary ammonium salt: dissolve 0.05 mol N-methylimidazole which has been dried and distilled in toluene, and then add a slight excess of brominated hydrocarbon (according to imidazole) The different substituents are selected accordingly. The brominated hydrocarbons specifically involved in the three ionic liquids in this embodiment are brominated n-butane, brominated n-hexane and allyl bromide), magnetically stirred, heated to reflux, and the reaction 4 h, reaction product removes most of solvent through layering, and washes 3 times with ethyl acetate, to remove residual solvent and unreacted raw material, vacuum drying 24 h, obtains intermediate bromoimidazole quaternary ammonium salt ([Rmim ]Br, R are butyl, hexyl and allyl, respectively).

[0033] (2) Preparation of imidazole quaternary ammonium ...

Embodiment 2

[0035] Example 2 This example is the corrosion inhibition effect of different concentrations of 1-butyl-3-methyl-imidazolium lysine salt on carbon steel in sulfuric acid solution

[0036] In order to investigate the relationship between the concentration of 1-butyl-3-methyl-imidazolium lysine salt ionic liquid and its corrosion inhibition effect on carbon steel in sulfuric acid solution, the mass percentage concentration of the same volume (1000 mL) was taken as 5 % 5 parts of sulfuric acid, add 1-butyl-3-methyl-imidazolium lysine salt ionic liquid so that its concentration is respectively 0.001, 0.005, 0.01, 0.05, 0.1mol / L, and take 5% of that without adding ionic liquid Sulfuric acid was used as a blank control, and then the carbon steel samples (specification: 50 mm × 25 mm × 3 mm) were placed in the above solution for 12 h under the temperature condition of 30±1 °C, and then the carbon steel samples were determined according to formula 1. The corrosion rate of the steel ...

Embodiment 3

[0049] Example 3 This example is the corrosion inhibition effect of different concentrations of 1-hexyl-3-methyl-imidazolium lysine salt on carbon steel in sulfuric acid solution

[0050] In order to investigate the relationship between the concentration of 1-hexyl-3-methyl-imidazolium lysine salt ionic liquid and its corrosion inhibition effect on carbon steel in sulfuric acid solution, the same volume (1000 mL) of 5 parts of sulfuric acid, add 1-hexyl-3-methyl-imidazolium lysine salt ionic liquid so that its concentration is respectively 0.001, 0.005, 0.01, 0.05, 0.1mol / L, and take the blank control in embodiment 2 as this For the blank control of the example, under the temperature condition of 30±1 ℃, carbon steel samples (specification: 50 mm × 25 mm × 3 mm) were respectively placed in the above solution for 12 h, and then the carbon steel samples were determined according to formula 1. The corrosion rate of the steel sample, and calculate the corrosion inhibition effici...

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Abstract

The invention discloses an application of ionic liquid which serves as a steel corrosion inhibitor. The imidazolyl lysine salt ionic liquid serves as a corrosion inhibitor, only the corrosion inhibitor is required to be added into a solution contacted with steel, and the corrosion inhibitor is easy to operate and good in corrosion inhibition effect. The corrosion inhibitor is environment-friendly, high in solubility and biodegradability and good in corrosion inhibition effect, and solves the problems that the conventional corrosion inhibitor has large toxic and side effects, low biodegradation, poor environment friendliness and the like.

Description

technical field [0001] The invention belongs to the field of corrosion inhibitors, in particular to ionic liquid iron and steel corrosion inhibitors. Background technique [0002] Steel is one of the most important materials in modern industry, widely used in sea, land and air transportation, bridges, vehicles, mechanical equipment, petrochemical, urban construction and many other fields. Generally, the surface of steel needs to be cleaned with acid solution, which will inevitably corrode the steel material, cause waste, and even affect the performance of the material. Steel corrosion not only affects the life of equipment, but 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, because of its small dosage, low cost, wide application range, high corrosion inhibition efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/04C23F11/14C23G1/06
Inventor 龚敏郑兴文姜春梅陈雪丹
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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