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Chlorohydric acid pickling corrosion inhibitor and preparation method thereof

A pickling corrosion inhibitor and hydrochloric acid technology, which is applied in the field of industrial equipment cleaning, can solve the problems of corrosion inhibitors that are difficult to degrade, have toxicity, and be harmful to humans and the environment, and achieve the effects of saving chemical costs, reducing corrosion, and using less

Active Publication Date: 2015-12-09
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite their good corrosion inhibition properties, these corrosion inhibitors are often difficult to degrade and toxic, which is very harmful to humans and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Select raw materials by weight percentage

[0020] Sodium thiocyanate 5%,

[0021] Quaternary ammonium salt type hexadecyl cationic imidazoline 15%,

[0022] Cetyltriethylamine Bromide 10%,

[0023] Aniline 5%,

[0024] The rest is water.

[0025] Add reverse osmosis water, sodium thiocyanate, quaternary ammonium type hexadecyl cationic imidazoline, cetyl triethylamine bromide, and aniline into the container in sequence, and stir at room temperature for 2 to 3 hours , the product is obtained.

Embodiment 2

[0027] Select raw materials by weight percentage

[0028] Sodium thiocyanate 3%,

[0029] Quaternary ammonium salt type hexadecyl cationic imidazoline 15%,

[0030] Cetyltriethylamine Bromide 15%,

[0031] Aniline 5%,

[0032] The rest is water.

[0033] Add reverse osmosis water, sodium thiocyanate, quaternary ammonium type hexadecyl cationic imidazoline, cetyl triethylamine bromide, and aniline into the container in sequence, and stir at room temperature for 2 to 3 hours , the product is obtained.

Embodiment 3

[0035] Select raw materials by weight percentage

[0036] Sodium thiocyanate 3%,

[0037] Quaternary ammonium salt type hexadecyl cationic imidazoline 10%,

[0038] Cetyltriethylamine Bromide 18%,

[0039] Aniline 8%,

[0040] The rest is water.

[0041] Add reverse osmosis water, sodium thiocyanate, quaternary ammonium type hexadecyl cationic imidazoline, cetyl triethylamine bromide, and aniline into the container in sequence, and stir at room temperature for 2 to 3 hours , the product is obtained.

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PUM

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Abstract

The invention provides a chlorohydric acid pickling corrosion inhibitor and a preparation method thereof. The chlorohydric acid pickling corrosion inhibitor is formed by combing sodium sulfocyanate, imidazoline and a derivative thereof, an acid pickling fog inhibitor, aniline and pure water. The mass ratio of sodium sulfocyanate, imidazoline and a derivative thereof, an acid pickling fog inhibitor, aniline and pure water is as follows: (3-8): (10-20): (5-15): (5-10): (47-77). The invention provides the preparation method of the chlorohydric acid pickling corrosion inhibitor, five substances are sequentially put into an agitation vessel in a certain mass ratio and then stirred and dissolved, so that the chlorohydric acid pickling corrosion inhibitor can be obtained. According to the chlorohydric acid pickling corrosion inhibitor and the preparation method thereof, five substances are compounded and used in a certain mass ratio; during chlorohydric acid pickling, the corrosion inhibition effect of the chlorohydric acid pickling corrosion inhibitor on low-carbon steel is superior to any one used separately of the substances; and besides, the dosage is smaller than that of existing domestic chlorohydric acid pickling corrosion inhibitors, so that the acid pickling reagent cost can be saved. The dosage of the chlorohydric acid pickling corrosion inhibitor is small; corrosion of hydrochloric acid to a metallic matrix of a cleaned device can be reduced substantially; and the chlorohydric acid pickling corrosion inhibitor can be widely applied to the field of chlorohydric acid pickling for industrial devices.

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 hydrochloric acid pickling corrosion inhibitor and a preparation method thereof. Background technique [0002] The use of strong acid to clean surface rust and dirt is an important means of surface pretreatment of metal materials and descaling of pipelines and boiler systems. It is still widely used in metal materials, machinery, metallurgy, and chemical industries. In strong acid cleaning, hydrochloric acid is the most widely used pickling agent. Hydrochloric acid can not only quickly dissolve iron oxides, but also have good surface condition after pickling, less hydrogen permeation, and high solubility of ferric chloride without pickling residue. However, hydrochloric acid is highly corrosive to metals, and the phenomenon of "over-corrosion" often occurs during the pickling process, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23F11/16
Inventor 张晓冬李洪社喻果
Owner WEIHAI XIANGYU TECH
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