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Triazole carbon steel restrainer and uses thereof

A pickling corrosion inhibitor and corrosion inhibitor technology, which is applied in the field of triazole high-efficiency carbon steel pickling corrosion inhibitors, can solve the problems of lack of market competitiveness, poor environmental friendliness, toxic and side effects, etc., and achieve good application prospects , Inhibition of excessive corrosion, strong effect of continuous action

Inactive Publication Date: 2010-09-01
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 corrosion inhibitor 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. Market Competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The pickling solution is dilute hydrochloric acid, the concentration is 0.6M, the amount of pickling solution is 100L, add 1-(4,5-dihydro-3-(4-fluorophenylpyrazole)-1-yl)-2-(1 30 g of hydrogen-1,2,4-triazol-1-yl)ethanone, and immerse the steel to be cleaned in the pickling solution for 4 hours at room temperature.

[0022] The highest corrosion inhibition efficiency obtained through experimental testing is 95%, which shows that it is an efficient corrosion inhibitor.

Embodiment 2

[0024] The pickling solution is dilute hydrochloric acid, the concentration is 0.6M, the amount of pickling solution is 100L, add 1-(4,5-dihydro-3-phenylpyrazol-1-yl)-2-(1hydrogen-1,2 , 4-triazol-1-yl)ethanone 15g and 1-(4,5-dihydro-3-(4-fluorophenylpyrazol)-1-yl)-2-(1 hydrogen-1,2 , 4-triazol-1-yl) ethyl ketone 15g, immerse the steel to be cleaned in the pickling solution for 4 hours at room temperature.

[0025] The highest corrosion inhibition efficiency obtained through experimental testing is 92%, which shows that it is an efficient corrosion inhibitor.

Embodiment 3

[0027] The pickling solution is dilute hydrochloric acid, the concentration is 1M, the amount of pickling solution is 100L, add 1-(4,5-dihydro-3-(2,4-dichlorophenylpyrazole)-1-yl)-2- (1H-1,2,4-triazol-1-yl)ethanone 35g, just immerse the steel to be cleaned in the pickling solution for 1 hour at room temperature.

[0028] The highest corrosion inhibition efficiency obtained through experimental testing is 96%, showing that it is an efficient corrosion inhibitor.

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Abstract

The invention relates to a pickling inhibitor for steels, in particular to a triazole compound pickling inhibitor for steels and its application, which comprises one or more than one combination from 1-(4, 5-dihydro-3-(4-fluorobenzene pyrazol)-1-group)-2-(1 hydro-1, 2, 4-triazole-1-group) ethyl ketone, 1-(4, 5-dihydro-3-(4-chlorophenyl pyrazol)-1-group)-2-(1 hydro-1, 2, 4- triazole-1-group) ethylketone, 1-(4, 5-dihydro-3-(2, 4-dichlorophenyl pyrazol)-1-group)-2-(1 hydro-1, 2, 4-triazole-1-group)ethyl ketone, 1-(4, 5-dihydro-3-phenyl pyrazol-1-group)-2-(1 hydro-1, 2, 4-triazole-1-group). The inhibitor of the invention is able to prevent over etching of substrate metal and over consumption of acid solution during the pickling, which has low consumption, high efficiency and strong continuous action, easy synthesization, no harm and toxicity, and complies with the development tend of inhibitor, therefore, has good application prospect.

Description

technical field [0001] The invention relates to a corrosion inhibitor for steel pickling, in particular to a triazole high-efficiency carbon steel pickling corrosion inhibitor used to prevent carbon steel and its products from unnecessary corrosion and acid consumption in the pickling process and its application. 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. From the perspective of social economy, it can reduce the fuel consumption caused by dirt; from the perspective of environmental protection, it reduces fuel exhaust gas and air pollution; from the perspective of safety, thermal equipment such as boilers and heat exchangers are used Various types of dirt are gradually formed during the process, and the poor heat conduction of these dirt causes the local temperature of the furnace tube to rise, reduces the strength ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/08C23G1/06C23G1/02
Inventor 李伟华许风玲张树芳侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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