Vitamins carbon steel pickling inhibitor and application thereof

A technology of pickling corrosion inhibitor and vitamins, which is applied in the field of high-efficiency vitamin-based carbon steel pickling corrosion inhibitors, can solve the problems of not having market competitiveness, not adapting to global environmental protection requirements, toxic and side effects of cleaning agents, etc. To achieve the effect of preventing excessive corrosion, strong continuous action ability and low dosage

Inactive Publication Date: 2011-03-30
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used cleaning agents mainly include toxic inorganic corrosion inhibitors such as chromate, nitrate, and nitrite, as well as some organic phosphorus corrosion inhibitors, whose di

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The pickling solution is dilute hydrochloric acid, the concentration is 0.1M, the amount of pickling solution is 100L, vitamin B135g or vitamin B635g is added, and the steel to be cleaned is immersed in the pickling solution for 4h at room temperature.

[0016] The highest corrosion inhibition efficiency obtained by the experimental test is 93% / 91%, which shows that it is an efficient cleaning agent.

Embodiment 2

[0018] The pickling solution is dilute hydrochloric acid, the concentration is 0.1M, the amount of pickling solution is 100L, vitamin B120g and vitamin B620g are added, and the steel to be cleaned is immersed in the pickling solution for 4 hours at room temperature.

[0019] The highest corrosion inhibition efficiency obtained by the experimental test is 92%, which shows that it is an efficient cleaning agent.

Embodiment 3

[0021] The pickling solution is dilute hydrochloric acid, the concentration is 0.5M, the amount of pickling solution is 100L, vitamin B135g or vitamin B635g is added, and the steel to be cleaned is immersed in the pickling solution for 4h at room temperature.

[0022] The highest corrosion inhibition efficiency obtained by the experimental test is 90% / 89%, which shows that it is an efficient cleaning agent.

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PUM

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Abstract

The invention discloses a vitamins carbon steel pickling inhibitor used for preventing carbon steel and a product thereof from unnecessary corrosion and acid liquor consumption in the pickling process and application thereof. The inhibitor is one or a composite of vitamins organic compounds of vitamin B1 (chloride3-((4-amino-2-methyl-5-pyrimidyl) methyl) 5-(beta-ethoxyl-4-methyl) onium hydrochloride and vitamins B6 (2-methyl-3-hydroxy-4, 5-dihydroxymethyl pyridine hydrochloride). The application of the pickling inhibitor is shown as follows: a cleaning solution is a diluted hydrochloric acid or a dilute sulphuric acid, and the concentration of the cleaning solution is 0.10-1.0kmol/m<3>; the 0.010kg/m<3>-2.0kg/m<3> of cleaning solution is added; the temperature is controlled to be about 25 DEG C; the carbon steel or the product thereof to be cleaned is added and is immersed for 30min-4 hours. The product of the invention is used for surface cleaning of the carbon steel and the product thereof, can prevent the excessive erosion of metal and the excessive consumption of the acid liquor in the cleaning process and has the outstanding advantages of low use level, high efficiency and strong continuous action capacity.

Description

technical field [0001] The invention relates to a production technology of a corrosion inhibitor, in particular to a vitamin-based high-efficiency carbon steel pickling corrosion inhibitor for preventing unnecessary corrosion and acid liquid consumption of carbon steel and its products during the pickling process and the same application. Background technique [0002] Steel is used more and more widely. In the process of product processing and application, dilute sulfuric acid or dilute hydrochloric acid is often used for surface cleaning to remove the oxide film or corrosion products on the surface. The phenomenon of "over-corrosion" occurs. This process will not only cause corrosion of metal materials, but also produce a large amount of acid, which will cause serious damage to the environment. In order to avoid the excessive consumption of metal or acid during the pickling process and prevent the occurrence of harmful corrosion, it is an economical and effective method to...

Claims

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Application Information

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IPC IPC(8): C23G1/06C23G1/08
Inventor 庞雪辉张洁谭福能高创李伟华侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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