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Efficient sulfuric acid pickling corrosion inhibitor and preparation method thereof

A sulfuric acid pickling and corrosion inhibitor technology, which is applied in the field of industrial equipment cleaning, can solve the problems of low corrosion inhibition rate and achieve the effect of saving chemical costs

Inactive Publication Date: 2015-06-24
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many varieties of sulfuric acid pickling corrosion inhibitors on the market, but the common problem is that the corrosion inhibition rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Select raw materials by weight percentage

[0018] Methylthiourea 10%,

[0019] 2-Methylimidazoline 10%,

[0020] Benzylquinoline Chloride 5%,

[0021] The rest is water.

[0022] Add reverse osmosis product water, methylthiourea, 2-methylimidazoline, and benzyl quinoline chloride in proportion to the container, and stir at room temperature for 2 to 3 hours to obtain the product.

Embodiment 2

[0024] Select raw materials by weight percentage

[0025] Tolylthiourea 10%,

[0026] 2-Ethylimidazoline 10%,

[0027] Benzylquinoline Chloride 5%,

[0028] The rest is water.

[0029] Add reverse osmosis product water, tolylthiourea, 2-ethylimidazoline, and benzylquinoline chloride in sequence in proportion to the container, and stir at room temperature for 2 to 3 hours to obtain the product.

Embodiment 3

[0031] Select raw materials by weight percentage

[0032] Methylthiourea 15%,

[0033] 2-Methylimidazoline 15%,

[0034] Allyl Quinoline Chloride 10%,

[0035] The rest is water.

[0036] The reverse osmosis product water, tolylthiourea, 2-methylimidazoline, and allyl quinoline chloride are sequentially added to the container in proportion, and stirred at room temperature for 2 to 3 hours to obtain the product.

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PUM

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Abstract

The invention provides an efficient sulfuric acid pickling corrosion inhibitor and a preparation method thereof. The sulfuric acid pickling corrosion inhibitor is a combination of thiourea and derivatives of thiourea, imidazoline, quaternary ammonium salt and pure water which are in a mass ratio of (10-20):(10-20):(5-10):(50-75). The invention further provides the preparation method of the efficient sulfuric acid pickling corrosion inhibitor. The four substances are added in a stirrer in sequence according to a certain mass ratio and are mixed and dissolved to obtain the efficient sulfuric acid pickling corrosion inhibitor. The four substances are compounded according to a certain ratio; during the sulfuric acid pickling process, the corrosion inhibitor has better corrosion inhibiting effect on low-carbon steel than any one of the four substances if the four substances are used separately; in addition, the use amount of the corrosion inhibitor is smaller than sulfuric acid pickling corrosion inhibitors available in China and the chemical agent cost of pickling is saved. The efficient sulfuric acid pickling corrosion inhibitor provided by the invention has the advantages of small use amount and high corrosion inhibition effect and can be widely applied to the field of sulfuric acid pickling of industrial equipment.

Description

technical field [0001] The invention relates to the field of industrial equipment cleaning, in particular to the field of development of pickling corrosion inhibitors, in particular to a high-efficiency sulfuric acid pickling corrosion inhibitor and a preparation method thereof. Background technique [0002] Pickling is widely used in scale cleaning of heat exchange equipment, heat transfer equipment and cooling equipment in various industrial sectors, especially the pickling of thermal equipment (such as boilers) in the power sector is particularly important. From the perspective of social economy, it can reduce the fuel consumption caused by dirt; from the perspective of environmental protection, it reduces fuel exhaust gas and air pollution; from the perspective of safety, thermal equipment such as boilers and heat exchangers are used Various types of dirt are gradually formed during the process, and the poor heat conduction of these dirt causes the local temperature of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
Inventor 张晓冬李洪社喻果
Owner WEIHAI XIANGYU TECH