A kind of ph value sensitive intelligent corrosion inhibitor and preparation method thereof

Abstract

The invention provides an intelligent corrosion inhibitor with pH value sensibility and a preparation method of the intelligent corrosion inhibitor. The intelligent corrosion inhibitor with pH value sensibility is of a spherical nucleus / shell nanometer structure, the particle diameter is about within the range from 60 nanometers to 150 nanometers, the shell thickness is about within the range from 5 nanometers to 20 nanometers, the pH sensibility interval ranges from 7 to 11, and the intelligent corrosion inhibitor is composed of a hydrophilic shell which is made of a macromolecule material with pH sensibility and a hydrophobic nucleus made of a polymer substrate loaded with corrosion inhibition components. The corrosion inhibitor has the beneficial effects that the pH sensibility interval is wide, varieties of corrosion inhibition components can be released, the structure is fine, and the release controllability of the corrosion inhibition components is good; and losing and failures of the corrosion inhibition components can be avoided effectively so that the corrosion inhibition components can intelligently play a role in inhibiting metal corrosion for a long time. Meanwhile, the invention provides a preparation method of the intelligent corrosion inhibitor which has the pH value sensibility, is of the nucleus / shell nanometer structure and can intelligently inhibit the metal corrosion for a long time.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion of metal materials, and in particular relates to a pH-sensitive core / shell nanostructure corrosion inhibitor capable of intelligently and long-term inhibiting metal corrosion and a preparation method thereof. Background technique [0002] Corrosion inhibitor technology can effectively prevent or slow down the corrosion of metal materials, and is one of the most widely used anti-corrosion technologies for metal materials. Corrosion inhibitors are often used in one-off or continuous doses, which leads to the high concentration of traditional corrosion inhibitors in the early stage of use. Although they can effectively inhibit metal corrosion, they may also cause a certain amount of waste at the same time. The corrosion inhibitor will quickly fail due to hydrolysis, degradation, loss, etc., and it is difficult to exert its inhibitory effect on the corrosion of metal materials for a long time. ...

AI Technical Summary

Problems solved by technology

Corrosion inhibitors are often used in one-off or continuous doses, which leads to the high concentration of traditional corrosion inhibitors in the early stage of use. Although they can effectively inhibit metal corrosion, they may also cause a certain amount of waste at the same time. growth, the corrosion inhibitor will quickly fail due to hydrolysis, degradation, loss, etc., and it is difficult to exert a lasting inhibitory effect on the corrosion of metal materials

In order to solve the above-mentioned problems of short service life and low utilization rate of traditional corrosion inhibitors, some scholars have invented intelligent corrosion inhibitors based on pH-sensitive hydrogel embedding corrosion inhibition components in recent years. This kind of corrosion inhibitors can use The pH sensitivity and three-dimensional network structure of the gel can control the release of the corrosion-inhibiting components embedded in it, thereby prolonging the service life of the corrosion-inhibiting components and improving their utilization, such as: Chinese invention patents CN201310004233.4 and CN201510030747. 6 Embed the corrosion inhibitor benzotriazole in the three-dimensional network structure formed by the pH-sensitive hydrogel, and use the pH-sensitive hydrogel to swell to release the corrosion inhibitor benzotriazole nitrogen azole to achieve the purpose of controlling the release of corrosion inhibition components; Chinese invention patent CN201310714579 also prepared pH-sensitive gel microspheres, which also use the pH-sensitive hydrogel to swell in response to the environmental pH value to release corrosion inhibition components. To achieve the purpose of controlling the release of corrosion inhibitor components; these works have greatly promoted the development of intelligent corrosion inhibitors

But at the same time, it is not difficult to find that the current development of intelligent corrosion inhibitors is still in its infancy, and there are many problems such as narrow pH sensitive range, few types of releasable corrosion inhibitors, simple structure, and poor controllability of corrosion inhibitor release.

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