Uracil carbon steel pickling corrosion inhibitor and application thereof

A technology of pickling corrosion inhibitor and uracil, which is applied in the field of corrosion inhibitor production, can solve the problems of lack of market competitiveness, toxic and side effects, eutrophication of water bodies, etc., and achieves good application prospects, strong continuous action ability, Low dosage effect

Inactive Publication Date: 2008-01-09
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 inhibitors containing toxic chromate and some organic phosphorus corrosion inhibitors, the discharge of which may cause eutrophication of water bodies
Most of the existing corrosion inhibitors in the same field have toxic and side effects and do not have market competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, 200g of 2,5-dithiouracil is added, and the steel to be cleaned is immersed in the pickling solution for 2 hours at room temperature.

[0019] The highest corrosion inhibition efficiency obtained through experimental testing is 96%, which shows that it is an efficient cleaning agent.

Embodiment 2

[0021] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, add 15g of uracil and 15g of 2,5-dithiouracil, and immerse the steel to be cleaned in the pickling solution at room temperature 2 hours is enough.

[0022] The highest corrosion inhibition efficiency obtained through experimental testing is 92%, which shows that it is an efficient cleaning agent.

Embodiment 3

[0024] The pickling solution is dilute hydrochloric acid, the concentration is 1M, the amount of pickling solution is 100L, 50g of 2-thiouracil is added, and the steel to be cleaned is immersed in the pickling solution for 1 hour at room temperature.

[0025] The highest corrosion inhibition efficiency obtained through experimental testing is 93%, which shows that it is an efficient cleaning agent.

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PUM

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Abstract

Production of corrosion inhibitor of uracil, in fact, preventing carbon steel and its products from unnecessary corrosion and acid liquid waste in acid washing process, and its use are both disclosed herewith. The corrosion inhibitor comprises kinds of uracil compounds, one or more kinds mixed. It is used to be added into acid liquid of (0.1mol / L-1mol / L) with concentration of corrosion inhibitor (0.001g-2.0g) / L. The uracil as component of nucleic acid exists widely in nature so as to have no toxicity. It is used a little and can work long.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitor production, in particular to a uracil-based 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] Pickling is widely used in scale cleaning of heat exchange equipment, heat transfer equipment and cooling equipment in various industrial sectors. 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 of the stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06
Inventor 闫莹李焰邢少华侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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