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Triazole carbon steel restrainer and uses thereof

A technology for pickling corrosion inhibitors and triazoles, which is applied in the field of steel pickling corrosion inhibitors, can solve the problems of toxic side effects, poor environmental friendliness, etc., and achieves strong continuous action ability, inhibition of excessive corrosion, and simple synthesis steps. Effect

Inactive Publication Date: 2008-06-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently commonly used corrosion inhibitors mainly include inorganic compounds such as chromate, nitrate, and nitrite. Due to their toxic side effects and poor environmental friendliness, their application is being restricted and will be phased out.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, add 3,4-dichloroacetophenone-O-1'-(1'.3'.4'-triazole)methylene 30g of base oxime, and immerse the steel to be cleaned in the pickling solution for 4 hours at room temperature.

[0021] The highest corrosion inhibition efficiency obtained through experimental testing is 98%, which shows that it is an efficient corrosion inhibitor.

Embodiment 2

[0023] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, and 20g of 4-chloroacetophenone-O-1'-(1'.3'.4'-triazole)methylene oxime is added and 3,4-dichloroacetophenone-O-1'-(1'.3'.4'-triazole) methylene oxime 15g, the steel material to be cleaned is immersed in pickling solution at room temperature Immerse in water for 4h.

[0024] The highest corrosion inhibition efficiency obtained through experimental testing is 95%, which shows that it is an efficient corrosion inhibitor.

Embodiment 3

[0026] The pickling liquid is dilute hydrochloric acid, the concentration is 1M, the pickling liquid consumption is 100L, add 4-chloroacetophenone-O-1'-(1'.3'.4'-triazole) methylene oxime 40g, Submerge the steel to be cleaned in the pickling solution for 4 hours at room temperature.

[0027] The highest corrosion inhibition efficiency obtained through experimental testing is 91%, showing that it is an efficient corrosion inhibitor.

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PUM

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Abstract

The invention relates to steel product acid pickling corrosion inhibitor, in particular to a triazole carbon steel acid pickling corrosion inhibitor and the application. The corrosion inhibitor comprises one of the following components or the combination of no less than two components: 3, 4-dichloroacetophenone-O-1'-(1' .3' .4'- triazol) methylene oxime, 2, 5- dichloroacetophenone-O-1-(1.3.4- triazol) methylene oxime, and 4- chloro acetophenone-O-1'-(1' .3' .4'- triazol) methylene oxime. The corrosion inhibitor of the invention can effectively prevent the carbon steel material from the corrosion of the acid during the acid pickling process, which has the eminent advantages that the dosage is low, the corrosion inhibition efficiency is high, the corrosion inhibition performance is stable, and the composition is simple. The product of the invention has no pollution to the environment, and has higher productive value and wide marketing prospect.

Description

technical field [0001] The invention relates to steel pickling corrosion inhibitors, specifically a triazole high-efficiency carbon steel acid used to prevent carbon steel and its products from being corroded by acid on carbon steel materials and excessive consumption of acid solution in the pickling process Corrosion inhibitors and their applications. Background technique [0002] Strong acid cleaning of surface rust and dirt is an important cleaning method for surface pretreatment of metal materials, cleaning and descaling of pipes and boiler systems. Because pickling is of great significance to maintain the normal operation of equipment, it is still widely used in metal materials, machinery, metallurgy, chemical industry and other industries. [0003] Because strong acid has a corrosive effect on metal equipment, the phenomenon of "over-corrosion" often occurs in the pickling process, that is, not only the rust and dirt on the metal surface are removed during the picklin...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/08
Inventor 李伟华闫莹许风玲侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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