Aminoacids composite restrainer and method of use thereof

A technology of amino acid and corrosion inhibitor, which is applied in the field of amino acid compound pickling corrosion inhibitor and corrosion inhibitor, can solve the problems of easy harm to human body, waste of funds, high toxicity, etc., and achieve low production cost, small dosage, Long lasting effect

Inactive Publication Date: 2009-02-04
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently commonly used corrosion inhibitors are highly toxic and can easily harm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Example 1

[0011] The pickling liquid is dilute hydrochloric acid, the concentration is 1M, the amount of the pickling liquid is 100L, 0.5g methionine, 0.5g potassium iodide and 0.1g cetyltrimethylammonium bromide are added, and the cleaned steel is immersed in the pickling at room temperature 4h in the liquid is enough.

[0012] The highest corrosion inhibition efficiency obtained through experimental tests is 97%, which shows that it is an efficient corrosion inhibitor.

Example Embodiment

[0013] Example 2

[0014] The pickling liquid is dilute hydrochloric acid, the concentration is 1M, the amount of the pickling liquid is 100L, 0.5g cysteine, 0.5g potassium iodide and 0.1g cetyltrimethylammonium bromide are added, and the cleaned steel is immersed at room temperature 4h in the pickling solution is enough.

[0015] The highest corrosion inhibition efficiency obtained through experimental testing is 96%, which shows that it is an efficient corrosion inhibitor.

Example Embodiment

[0016] Example 3

[0017] The pickling liquid is dilute hydrochloric acid, the concentration is 0.8M, the amount of the pickling liquid is 100L, 0.5g methionine, 0.5g potassium iodide and 0.1g cetyltrimethylammonium bromide are added, and the cleaned steel is immersed at 40℃ 3h in the pickling solution is enough.

[0018] The highest corrosion inhibition efficiency obtained through experimental tests is 95%, which shows that it is an efficient corrosion inhibitor.

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PUM

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Abstract

The invention relates to amino acid composite acid cleaning inhibiter and an application method thereof. The inhibiter consists of amino acid, iodized salt and hexadecyl trimethyl ammonium bromide, and the mixing ratio of the three components is 1-5: 1-5: 1-5; the inhibiter is used for industrial acid cleaning together with acid pickling solution, and the application method is as follows: the acid pickling solution is dilute sulphuric acid or dilute hydrochloric acid with 0.1m to 2m of concentration, the weight content of the inhibiter in the acid pickling solution is 0.001g/l to 2.0g/l, the acid cleaning temperature is 20 DEG C to 60 DEG C, and the acid cleaning time is 0.5h to 6h. The invention is mixed inhibiter with amino acid as the main component; amino acid can be well dissolved in water, has no toxin and harm to the environment, is capable of biodegradation, has high restraining efficiency, strong continuity capability and is very potential green inhibiter; in addition, the inhibiter has high efficiency, has no toxin and harm, small dosage and quite low production cost, and opens up a novel field for the safety and high-efficiency utilization of inhibiter.

Description

technical field [0001] The invention relates to a corrosion inhibitor in the technical field of industrial cleaning, in particular to an amino acid compound pickling corrosion inhibitor and an application method thereof. Background technique [0002] Pickling corrosion inhibitors are widely used in metal acid leaching rust removal, process equipment pickling descaling and acidizing oil recovery and other processes. Commonly used acids for pickling include inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, and hydrofluoric acid, and organic acids such as citric acid and sulfamic acid. However, these acids have a corrosive effect on metal equipment, especially the corrosion of inorganic acids is more serious. In order to inhibit metal corrosion, reduce the amount of acid used, improve the effect of pickling and prolong the service life of equipment, corrosion inhibitors should be added during pickling. However, the currently commonly used corrosion in...

Claims

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Application Information

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IPC IPC(8): C23G1/06
Inventor 芮玉兰梁英华田会娟
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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