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Hydrochloric acid pickling corrosion and fog inhibitor and preparation method thereof

A fog inhibitor and corrosion inhibitor technology, which is applied in the field of hydrochloric acid pickling corrosion inhibitor and fog inhibitor, can solve the problem that the corrosion inhibitor, fog inhibitor and environmental protection performance of the corrosion inhibitor are difficult to achieve uniform excellence, polyaspartic acid Low anti-fog effect, unsatisfactory corrosion inhibition effect and other problems, to achieve significant practical value, excellent corrosion inhibition, and ensure the effect of environmental protection

Pending Publication Date: 2021-05-14
河北源清环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyaspartic acid is a polymeric polymer substance that is biodegradable and has corrosion inhibition effect. The anti-fog effect is low, and the lauryl polyoxyethylene ether used to exert the anti-fog effect does not have biodegradability. Difficult to reach average

Method used

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  • Hydrochloric acid pickling corrosion and fog inhibitor and preparation method thereof
  • Hydrochloric acid pickling corrosion and fog inhibitor and preparation method thereof
  • Hydrochloric acid pickling corrosion and fog inhibitor and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment relates to a kind of anti-corrosion and anti-fogging agent, its raw material composition includes:

[0026] Polyaspartic acid 5-25kg, light yellow to reddish brown viscous liquid, pH 7.0-9.0, average molecular weight 1000-3000;

[0027] Amino acid 5-25kg, choose from lysine, arginine, histidine;

[0028] Alkyl glycoside surfactant 1-5kg, selected from APG0810 and APG0814;

[0029] 45-79kg of water is used to prepare 100kg of corrosion and fog inhibitors.

[0030] Concrete preparation steps are as follows:

[0031] a-1. Add 75kg of L-aspartic acid into the polymerization reactor, then add 0.75~1.9kg of catalyst phosphoric acid, stir well, and heat up the polymerization at 20~30 rpm under continuous stirring to control the polymerization The temperature is 160±5℃, and the polymerization time is 1~3h;

[0032] a-2. After the polymerization reaction is finished and the reaction material is lowered to room temperature, the reaction material is transferred...

Embodiment 2

[0041] This example relates to the influence of polyaspartic acid obtained under different preparation conditions on the use effect of corrosion and fog inhibitors. The preparation of polyaspartic acid adopts the method of polymerization of L-aspartic acid and hydrolysis of lye, and the specific preparation conditions and application effects are shown in Table 3 below.

[0042]

[0043]

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Abstract

The invention discloses a hydrochloric acid pickling corrosion and fog inhibitor. Every 100 parts of the corrosion and fog inhibitor comprises 5-25 parts of polyaspartic acid, 5-25 parts of amino acid, 1-5 parts of an alkyl glycoside surfactant and the balance water; the total mass of the polyaspartic acid and the amino acid is not less than 20 parts; the polyaspartic acid is obtained by carrying out thermal shrinkage polymerization on L-aspartic acid for 1-3 hours at 160 + / -5 DEG C under the action of catalyst phosphoric acid and then hydrolyzing with ammonia water; the pH is controlled to be 10.5-11.0 in the ammonia water hydrolysis process; and the amino acid is selected from at least one of lysine, arginine and histidine. According to the corrosion and fog inhibitor disclosed by the invention, the polyaspartic acid is qualitatively prepared, the alkyl glycoside surfactant suitable for the polyaspartic acid is selected, and the amino acid is combined, so that the three raw materials generate mutual synergism, stable and excellent corrosion and fog inhibition effects can be obtained, and the defects of the raw materials can be avoided; and the disadvantage that conventional environment-friendly products are usually poor in performance is overcome, and the practical value is remarkable.

Description

technical field [0001] The invention relates to the technical field of pickling and anti-fog agents, in particular to a hydrochloric acid pickling anti-corrosion and anti-fog agent, and a preparation method of the anti-corrosion and anti-fog agent. Background technique [0002] Using acid solution to remove scale and rust on the metal surface is a method of cleaning the metal surface, called pickling. The use of strong acid to clean metal surfaces is an important means of surface pretreatment, pipe and boiler system descaling, and is widely used in metal materials, machinery, metallurgy, chemical industry and other industries. In strong acid cleaning, hydrochloric acid is the most widely used pickling agent. It has the advantages of large pickling capacity, fast speed, and no hydrogen embrittlement. It is volatile and causes acid mist to diffuse in the pickling site, causing serious environmental pollution and harm to the human body. [0003] In order to solve the acid mis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
CPCC23G1/061C23G1/063
Inventor 李峰刘国才殷召峰聂晓冉
Owner 河北源清环保科技有限公司
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