An environmentally friendly steel pickling acid mist inhibitor

An acid mist inhibitor and steel pickling technology, which is applied in the field of metal surface cleaning treatment, can solve the problems of unreachable acid mist suppression, easy cracking of the foam layer, and acid mist escape, so as to suppress the escape of acid mist, Excellent corrosion inhibition performance, easy to use

Active Publication Date: 2016-01-13
合肥华清高科表面技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of application effect, traditional acid mist inhibitors need dozens of minutes of foaming time. Too long foaming time makes the fog suppression effect not obvious, and the foam layer is easy to break
At the same time, when the acid concentration is too high, the effect is not good, and the suppression of acid mist cannot achieve the desired effect, and acid mist of different concentrations still escapes, especially for strong acid mist such as hydrochloric acid and hydrofluoric acid. The suppression effect is not ideal, and the adaptation surface is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An environment-friendly steel pickling acid mist inhibitor, which is composed of the following raw materials in weight percentage: 20% glycerol monostearate, 30% solid extract of rice straw, 5% glycerin, 4-sulfophthalic acid 4%, heptadecyl hydroxyethyl carboxymethylimidazoline 1%, and the balance is water.

[0023] The preparation method of the solid extract of rice straw: take 15g of rice straw sample, add 450mL of 80% ethanol to soak for 2h, reflux in a water bath at 75°C for 2h, recover ethanol, deesterify with petroleum ether, spin evaporate and concentrate to form a concentrated solution , and finally vacuum-dried to obtain a solid extract.

[0024] The preparation method of an environment-friendly steel pickling acid mist inhibitor: mix the solid extract of rice straw with glycerol monostearate, glycerin, 4-sulfophthalic acid, The heptaalkyl hydroxyethyl carboxymethyl imidazoline is mixed uniformly, added into water, and stirred uniformly to obtain the acid mist ...

Embodiment 2

[0029] An environment-friendly steel pickling acid mist inhibitor, which is composed of the following raw materials in weight percentage: 30% glycerol monostearate, 20% solid extract of corn stalks, 10% glycerin, 4-sulfophthalic acid 2%, heptadecyl hydroxyethyl carboxymethylimidazoline 2%, and the balance is water.

[0030] The preparation method of the solid extract of rice straw: take 15g of corn straw sample, add 450mL of 80% ethanol to soak for 2h, reflux in a water bath at 75°C for 2h, recover the ethanol, remove the ester with petroleum ether, and concentrate by rotary evaporation to form a concentrated solution , and finally vacuum-dried to obtain a solid extract.

[0031] The preparation method of an environment-friendly steel pickling acid mist inhibitor: mix the solid extract of corn stalks in the weight percentage with glycerol monostearate, glycerin, 4-sulfophthalic acid, The heptaalkyl hydroxyethyl carboxymethyl imidazoline is mixed uniformly, added into water, a...

Embodiment 3

[0034] An environment-friendly steel pickling acid mist inhibitor, which is composed of the following raw materials in weight percentage: 25% glycerol monostearate, 25% solid extract of wheat straw, 8% glycerin, 4-sulfophthalic acid 3%, heptadecyl hydroxyethyl carboxymethylimidazoline 1.5%, and the balance is water.

[0035] The preparation method of the solid extract of wheat straw: take 15g of wheat straw sample, add 450mL of 80% ethanol to soak for 2h, reflux in a water bath at 75°C for 2h, recover ethanol, deesterify with petroleum ether, and concentrate by rotary evaporation to form a concentrated solution , and finally vacuum-dried to obtain a solid extract.

[0036] The preparation method of an environment-friendly steel pickling acid mist inhibitor: mix the solid extract of wheat straw with glycerol monostearate, glycerin, 4-sulfophthalic acid, The heptaalkyl hydroxyethyl carboxymethyl imidazoline is mixed uniformly, added into water, and stirred uniformly to obtain t...

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Abstract

The invention discloses an environment-friendly steel pickling bath acid mist inhibitor which is prepared from the following raw materials in percentage by weight: 20-30% of glycerol monostearate, 20-30% of crop straw solid extract, 5-10% of glycerol, 2-4% of 4-sulfo-orthophthalic acid, 1-2% of heptadecylhydroxyethylcarboxymethyl imidazoline and the balance of water. Compared with the prior art, the inhibitor is especially suitable for a volatile acid pickling process, can obviously inhibit acid mist, and has corrosion resistance. The inhibitor has more obvious effect especially in a hydrochloric acid pickling process when the air humidity or acid concentration is high.

Description

technical field [0001] The invention belongs to the technical field of metal surface cleaning treatment, and in particular relates to an environment-friendly pickling acid mist inhibitor. Background technique [0002] Pickling to remove rust or surface oxide layer is the most common process in metal processing, machining and manufacturing industries. Due to the violent chemical reaction between metals and metal oxides and strong acids, a large amount of HCl, H 2 , HF and NO X Acid gas, the gas is carried in the process of rising and volatilizing to produce a large amount of acid aerosol pollutants, which is acid mist. The most commonly used pickling solution is prepared by hydrochloric acid. Hydrochloric acid has the characteristics of fast speed and good quality for rust removal, but hydrochloric acid is easy to volatilize, and a large amount of acid mist will appear during use. Physical injury, and at the same time cause serious corrosion to the workshop equipment, aft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06C23G1/08
Inventor 刘万青郑松林饶丹徐兴付杨蓓蓓詹华露何园崔亚茹
Owner 合肥华清高科表面技术股份有限公司
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