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Ionic liquid compounded corrosion and fog inhibitor and preparation method and application thereof

A technology of ionic liquid and anti-fog agent, which is applied in the field of ionic liquid compound corrosion inhibitor and anti-fog agent and its preparation, can solve the problems of poor iron appearance quality, short storage time, poor corrosion inhibition effect, etc., and achieve a wide liquid range , the concentration is reduced, and the effect of being easy to take

Active Publication Date: 2021-04-20
山东京博众诚清洁能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these corrosion inhibitors often have poor corrosion inhibition effect, large iron loss, resulting in a large amount of economic loss, and there are also problems such as poor iron appearance quality after pickling, easy to regenerate rust, resulting in short storage time and subsequent processing and production. The pickling process will also produce a large amount of acid mist, causing environmental pollution, and can be widely used in the field of pickling with hydrochloric acid

Method used

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  • Ionic liquid compounded corrosion and fog inhibitor and preparation method and application thereof
  • Ionic liquid compounded corrosion and fog inhibitor and preparation method and application thereof
  • Ionic liquid compounded corrosion and fog inhibitor and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] A preparation method of an ionic liquid compounded corrosion and fog inhibitor:

[0037] Preparation of ionic liquid: Weigh 41g of tetramethylammonium hydroxide, add 59g of thiobenzoic acid in 4 batches, control the low temperature at 5°C and keep stirring for 1h. When the pH value is 4.5, the target compound is obtained;

[0038] Preparation of anti-corrosion and anti-fogging agent: add 74.2g of deionized water to the container, heat it in a water bath to 45°C, add 20g of the ionic liquid prepared above to the water under stirring conditions and mix evenly, then add 5g of sodium citrate, 0.2 g butyl ether oil methyl pentanol, 0.5 g alkanolamide, 0.1 g sodium sulfonate and dissolve them in sequence to finally obtain 100 g of corrosion and fog inhibitor.

Embodiment 2

[0040] A preparation method of an ionic liquid compounded corrosion and fog inhibitor:

[0041] Preparation of ionic liquid: Weigh 50g of tetramethylammonium hydroxide, add 50g of thiobenzoic acid in 4 batches, control the low temperature at 5°C and keep stirring for 1.5h. When the pH value is 4.0, the target compound is obtained;

[0042] Preparation of corrosion and fog inhibitor: Add 79.6g of deionized water to the container, heat it in a water bath to 45°C, add 14g of ionic liquid, 6g of sodium citrate, 0.2g of glycerin oil, 0.1g of Lauryl dimethyl amine oxide, 0.1 g of sodium carboxylate were dissolved in sequence to finally obtain 100 g of corrosion and fog inhibitor.

Embodiment 3

[0044] A preparation method of an ionic liquid compounded corrosion and fog inhibitor:

[0045] Preparation of ionic liquid: Weigh 60g of trimethylphenylammonium hydroxide, add 40g of 2-furanthiocarboxylic acid in 5 batches, control the low temperature at 10°C and keep stirring for 1.5h. When the pH value is 4.3, the target Compound; corrosion and fog inhibitor preparation: add 67.42g of deionized water to the container, heat the water bath to 50°C, add 30g of ionic liquid, 2g of disodium EDTA, 0.1g of methyl pentanol, 0.4g of ammonium oxide and 0.08g of OP-10 were dissolved in turn to obtain 100g of corrosion and fog inhibitor.

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Abstract

The invention belongs to the technical field of carbon steel pickling, and particularly relates to an ionic liquid compounded corrosion and fog inhibitor and a preparation method and application thereof. The corrosion and fog inhibitor is prepared from the following components in parts by mass: 10-40 parts of ionic liquid, 1-10 parts of a complexing agent, 0.1-1 part of a foaming agent, 0.1-1 part of a foam stabilizer, 0.05-0.1 part of a wetting agent and 60-88 parts of a solvent. Compared with the prior art, the ionic liquid compounded corrosion and fog inhibitor can reduce excessive corrosion to steel in the hydrochloric acid pickling process, the usage amount is small, and the agent cost of pickling is saved; the re-rusting time of the pickled steel is long, and the pickled surface is attractive; and meanwhile, the corrosion and fog inhibitor can also be used as a fog inhibitor to greatly reduce generation of acid fog and reduce environmental pollution, and can be widely applied to the field of hydrochloric acid pickling.

Description

technical field [0001] The invention belongs to the technical field of carbon steel pickling, and in particular relates to an ionic liquid compounded anti-corrosion and anti-fog agent as well as its preparation method and application. Background technique [0002] Hydrochloric acid has been widely used as a pickling solution to remove iron surface oxides and pollutants, and its effect is mainly achieved by dissolving iron oxide. However, during this process, the acid solution will not only dissolve iron oxide, but also corrode the metal substrate, and the hydrogen gas generated at the same time may cause hydrogen embrittlement of the substrate material. Therefore, it is necessary to add corrosion and fog inhibitors in the pickling process to effectively inhibit the corrosion of the base material by the acid solution. However, these corrosion inhibitors often have poor corrosion inhibition effect, large iron loss, resulting in a large amount of economic loss, and there are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/10
CPCY02P20/54
Inventor 孔凡波邢莹莹张建林曹飞羽刘洋侯小敏
Owner 山东京博众诚清洁能源有限公司
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