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Preparation of pH-controlled-release long-acting intelligent corrosion inhibitor

A technology of controlled release and corrosion inhibitor, applied in the field of preparation of long-acting intelligent corrosion inhibitor, can solve the problems of accelerating corrosion, shortening the service life of the corrosion inhibitor, and high concentration of the corrosion inhibitor, and achieving a long service life and good corrosion resistance. Application prospect, good pH response effect

Inactive Publication Date: 2015-06-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional method of using corrosion inhibitors is to use one-off or continuous multiple injections, which makes the concentration of corrosion inhibitors too high at the initial stage of application, even higher than the maximum effective concentration. This is not only a waste of resources, but also sometimes Will reduce the slow release efficiency and even accelerate corrosion
In the later stage of application, the concentration of corrosion inhibitor is too low, even lower than the minimum effective concentration, which reduces the efficiency of corrosion inhibition and shortens the service life of corrosion inhibitor

Method used

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  • Preparation of pH-controlled-release long-acting intelligent corrosion inhibitor
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  • Preparation of pH-controlled-release long-acting intelligent corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of pH-sensitive hydrogel

[0027] a) Add 2.0g of starch into a three-necked flask with condenser, stirrer and thermometer. After adding 35mL of distilled water, blow in nitrogen, stir at 300 rpm, and gradually increase the temperature to 80°C. 0.1 g of ammonium persulfate initiator was dissolved in 5 mL of deionized water, and added to the aqueous solution of the above reactants, and the reaction was stabilized for 10 min. 1.5g of acrylic acid and 1.5g of hydroxyethyl methacrylate were added to the above-mentioned reactant aqueous solution; 0.05g of methylene bisacrylamide cross-linking agent was added to the above-mentioned reactant aqueous solution with 5mL of deionized water, and controlled at React at the above stirring speed and temperature for 60 minutes.

[0028] b) After the reaction is over, cool to room temperature, and adjust the pH to 8 with 1M NaOH solution. Add 0.05 g of sodium bicarbonate foaming agent at a stirring speed of 500 revolutio...

Embodiment 2

[0033] 1) Preparation of pH-sensitive hydrogel

[0034] a) Add 1.0g of starch to a three-necked flask with condenser, stirrer and thermometer, add 10mL of distilled water, pour in nitrogen, stir at 300 rpm, and gradually increase the temperature to 70°C. 0.03 g of ammonium persulfate initiator was dissolved in 3 mL of deionized water, and added to the aqueous solution of the above reactants, and the reaction was stabilized for 10 min. Add 1g of acrylic acid and 1g of hydroxyethyl methacrylate to the above-mentioned aqueous solution of reactants; add 0.03g of methylene bisacrylamide crosslinking agent to 3mL of deionized water and add to the above-mentioned aqueous solution of reactants, and control the stirring above React for 100min at speed and temperature.

[0035] b) After the reaction is over, cool to room temperature, and adjust the pH to 8 with 1M NaOH solution. Add 0.05 g of sodium bicarbonate foaming agent at a stirring speed of 500 revolutions per minute to produce a un...

Embodiment 3

[0039] 1) Preparation of pH-sensitive hydrogel

[0040] a) Add 2.0g of starch into a three-necked flask with condenser, stirrer and thermometer, add 20mL of distilled water, blow in nitrogen, stir at 300 rpm, and gradually increase the temperature to 100°C. 0.3 g of ammonium persulfate initiator was dissolved in 5 mL of deionized water, and added to the aqueous solution of the above reactants, and the reaction was stabilized for 10 minutes with continuous nitrogen flow. 1.5g of acrylic acid and 1.5g of hydroxyethyl methacrylate were added to the above-mentioned reactant aqueous solution; 0.3g of methylene bisacrylamide crosslinking agent was added to the above-mentioned reactant aqueous solution with 5mL of deionized water, and controlled at React for 150 minutes at the above stirring speed and temperature.

[0041] b) After the reaction is over, cool to room temperature, and adjust the pH to 8 with 1M NaOH solution. Add 0.05 g of sodium bicarbonate foaming agent at a stirring sp...

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Abstract

The invention belongs to the field of preparation of intelligent corrosion inhibitors, and particularly relates to a preparation method of a pH-controlled-release long-acting intelligent corrosion inhibitor. A using method of the conventional corrosion inhibitor is realized mainly through one-time addition or continuous addition for multiple times, and the concentration of the corrosion inhibitor in an early period is too high, while the concentration of the corrosion inhibitor in a late period is too low, therefore, resource waste is caused, the slow release efficiency is reduced, and even sometimes, the corrosion rate is accelerated, as a result, the invention prepares the pH-controlled-release long-acting intelligent corrosion inhibitor which is a hydrogel-embedded corrosion inhibitor, is sensitive to ambient pH and has a corrosion inhibiting function; and the intelligent corrosion inhibitor can determine the release condition according to different properties of an ambient medium.

Description

Technical field [0001] The invention belongs to the preparation field of intelligent corrosion inhibitors, and particularly relates to a preparation method of a long-acting intelligent corrosion inhibitor that can be released under pH control. Background technique [0002] Metal corrosion is widespread in all areas of life and production, and there are many ways to reduce or prevent metal corrosion. Among them, corrosion inhibitors have been widely used due to their advantages such as simple, fast and economical use. However, the traditional method of using corrosion inhibitors is mostly one-time injection or multiple consecutive injections. This makes the concentration of corrosion inhibitor too high or even higher than the highest effective concentration in the initial stage of injection. This is not only a waste of resources, but sometimes also It will reduce the slow-release efficiency and even accelerate corrosion. In the late stage of the release, the concentrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14C08F251/00C08J9/08C08J9/28
Inventor 董超芳栗丽肖葵吴俊升雷浩李晓刚
Owner UNIV OF SCI & TECH BEIJING