Green carbon steel corrosion inhibitor based on Bisflavanol

A corrosion inhibitor and carbon steel technology, applied in organic chemistry, organic chemistry methods, etc., can solve the problems of corrosion inhibitor side effects, environmental pollution, etc., and achieve the effect of inhibiting corrosion and excessive consumption, low dosage and high efficiency

Inactive Publication Date: 2021-08-03
威海海洋生物医药产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional corrosion inhibitors currently used are mainly oxidative inorganic corrosion inhibitor compounds containing chromate and organic phosphorus corrosion inhibitor compounds. Most of these corrosion inhibitors have toxic side effects, and their discharge will pollute the environment.

Method used

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  • Green carbon steel corrosion inhibitor based on Bisflavanol
  • Green carbon steel corrosion inhibitor based on Bisflavanol
  • Green carbon steel corrosion inhibitor based on Bisflavanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare solutions with concentrations of 0.2 mM, 0.4 mM, 0.6 mM, 0.8 Mm, and 1.0 mM with 0.5 mol / L dilute hydrochloric acid, respectively. Clean the carbon steel at room temperature, immerse it for 12 h, and then carry out the rotation test. At the same time, do a blank test without corrosion inhibitor. According to the formula: Calculate the corrosion inhibition efficiency, where is the corrosion rate without corrosion inhibitor, is the corrosion rate of corrosion inhibitor.

[0024] The test procedure should comply with the relevant provisions of HG / T 2159-91 Determination of Corrosion Inhibition Performance of Water Treatment Agents by Rotary Coupon Method.

Embodiment 2

[0026] Prepare solutions with concentrations of 0.2 mM, 0.4 mM, 0.6 mM, 0.8 Mm, and 1.0 mM with 1 mol / L dilute hydrochloric acid, respectively. Clean the carbon steel at room temperature, immerse it for 12 h, and then carry out the rotation test. At the same time, do a blank test without corrosion inhibitor. According to the formula: Calculate the corrosion inhibition efficiency, where is the corrosion rate without corrosion inhibitor, is the corrosion rate of corrosion inhibitor.

Embodiment 3

[0028] Prepare solutions with concentrations of 0.2 mM, 0.4 mM, 0.6 mM, 0.8 Mm, and 1.0 mM with 2 mol / L dilute hydrochloric acid, respectively. Clean the carbon steel at room temperature, immerse it for 12 h, and then carry out the rotation test. At the same time, do a blank test without corrosion inhibitor. According to the formula: Calculate the corrosion inhibition efficiency, where is the corrosion rate without corrosion inhibitor, is the corrosion rate of corrosion inhibitor.

[0029] The corrosion inhibition rate of the above three examples on carbon steel in acidic solution is as follows:

[0030] Table 1 Example 1

[0031]

[0032] Table 2 Example 2

[0033]

[0034] Table 3 Example 3

[0035]

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PUM

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Abstract

The invention relates to a green carbon steel corrosion inhibitor based on Bisflavanol, and belongs to the technical field of metal corrosion prevention. The green corrosion inhibitor is a Bisflavanol natural product and can be used for preventing corrosion and consumption of carbon steel in the pickling process. Experiments prove that the corrosion inhibitor can form a compact film layer on the surface of the carbon steel, and the corrosion rate of the carbon steel is slowed down. The corrosion inhibitor disclosed by the invention is a natural plant extract, has the characteristics of being green, environment-friendly, natural in source and pollution-free, does not cause any pollution to the environment in a use or sewage discharge process, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a green carbon steel corrosion inhibitor based on Bisflavanol. Background technique [0002] In many industrial processes, low-carbon steel is widely used because of its low price and easy operation, but it is easily corroded during its use, causing great safety threats and economic losses. In terms of performance and commercial value, the corrosion problem of carbon steel must be solved. In the process of pickling, descaling, etc., the commonly used acid is hydrochloric acid. Although it cannot completely prevent the corrosion of carbon steel, appropriate measures can be taken to slow down the rate. The commonly used method is to add corrosion inhibitors. [0003] The traditional corrosion inhibitors currently used are mainly oxidative inorganic corrosion inhibitor compounds containing chromate and organic phosphorus corrosion inhibitor compounds. Most of these corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08C07D311/62
CPCC23G1/063C23G1/08C07D311/62C07B2200/07
Inventor 吴彦超董险峰李惠静王丹阳
Owner 威海海洋生物医药产业技术研究院有限公司
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