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Oligomeric corrosion inhibitor as well as preparation method and application thereof

A technology of corrosion inhibitor and polymerization reaction, applied in the field of oligomeric corrosion inhibitor and its preparation, which can solve the problems of uncontrollable high molecular weight corrosion inhibitor and insignificant corrosion inhibition effect of corrosion inhibitor

Active Publication Date: 2021-07-06
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems in the prior art that the corrosion inhibition effect of the corrosion inhibitor in the neutral medium is not significant and the high molecular weight corrosion inhibitor is uncontrollable

Method used

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  • Oligomeric corrosion inhibitor as well as preparation method and application thereof
  • Oligomeric corrosion inhibitor as well as preparation method and application thereof
  • Oligomeric corrosion inhibitor as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of oligomeric corrosion inhibitor in the present invention comprises the following steps:

[0033] (1) Add maleic anhydride, sodium hypophosphite and deionized water in a three-necked flask with a stirring and condensing device, heat up and stir until all dissolve;

[0034] (2) Continue to heat up the solution obtained in the step (1) to a constant temperature of 90° C., and add dimethylaminopropyl methacrylamide;

[0035] (3) Add ammonium persulfate dropwise into the solution of step (2) with a constant pressure funnel, and react for 3 hours.

[0036] Wherein the ratio of the amount of maleic anhydride to dimethylaminopropyl methacrylamide (DMAPMA) is 1:1, and the quality of sodium hypophosphite and ammonium persulfate is two raw materials (maleic anhydride 6% of the total mass of sodium hypophosphite and the two raw materials (maleic anhydride and dimethylaminopropyl methacrylamide) are 1: 4. After the reaction was completed, the product was s...

Embodiment 2

[0051] The preparation method of oligomeric corrosion inhibitor in the present invention comprises the following steps:

[0052] (1) Add maleic anhydride, sodium hypophosphite and deionized water in a three-necked flask with a stirring and condensing device, heat up and stir until all dissolve;

[0053] (2) Continue to heat up the solution obtained in the step (1) to a constant temperature of 80° C., and add dimethylaminopropyl methacrylamide;

[0054] (3) Ammonium persulfate was added dropwise into the solution of step (2) with a constant pressure funnel, and reacted for 4 hours.

[0055] Wherein the ratio of the amount of maleic anhydride to dimethylaminopropyl methacrylamide (DMAPMA) substance is 2:1, and the quality of sodium hypophosphite and ammonium persulfate is two raw materials (maleic anhydride and dimethylaminopropyl methacrylamide) is 6% of the total mass, and the ratio of the amount of sodium hypophosphite and two kinds of raw materials (maleic anhydride and dimet...

Embodiment 3

[0058] The preparation method of oligomeric corrosion inhibitor in the present invention comprises the following steps:

[0059] (1) Add maleic anhydride, sodium bisulfite and deionized water in a three-necked flask with a stirring and condensing device, heat up and stir until completely dissolved;

[0060] (2) Continue to heat up the solution obtained in the step (1) to a constant temperature of 60° C., and add dimethylaminopropyl methacrylamide;

[0061] (3) Ammonium persulfate was added dropwise into the solution of step (2) with a constant pressure funnel, and reacted for 2 hours.

[0062] Wherein the ratio of the amount of maleic anhydride to dimethylaminopropyl methacrylamide (DMAPMA) is 1:3, and the quality of sodium hypophosphite and ammonium persulfate is two kinds of raw materials (maleic anhydride 10% of the total mass of sodium hypophosphite and the two raw materials (maleic anhydride and dimethylaminopropyl methacrylamide) are 1: 3. After the reaction was comple...

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Abstract

The invention discloses an oligomeric corrosion inhibitor as well as a preparation method and application thereof, and belongs to the field of water treatment and corrosion protection. The structural formula of the oligomeric corrosion inhibitor is shown in the specification, wherein n is 4, 5 or 6. The preparation method comprises the following steps of: dissolving maleic anhydride and a first initiator in water under a heating condition, continuing to heat to 60-100 DEG C, and adding dimethylaminopropyl methacrylamide; and dropwise adding a second initiator solution to enable the maleic anhydride and the dimethylaminopropyl methacrylamide to be subjected to a polymerization reaction, so as to obtain the oligomeric corrosion inhibitor. The corrosion inhibitor is low in molecular weight, narrow in molecular weight distribution, good in water solubility and remarkable in corrosion inhibition effect.

Description

technical field [0001] The invention relates to the fields of water treatment and corrosion protection, and more specifically relates to an oligomerized corrosion inhibitor and its preparation method and application. Background technique [0002] Corrosion inhibitor is a chemical substance or compound that can significantly inhibit corrosion in a small amount. Adding a small amount of corrosion inhibitor to the corrosive medium can not only significantly reduce the corrosion rate, but also maintain the mechanical properties of the metal material itself. The physical and chemical properties are basically unchanged, and the rational use of corrosion inhibitors can reduce losses in industrial production and bring huge economic benefits. [0003] Corrosion inhibitors can be roughly classified into inorganic corrosion inhibitors, organic corrosion inhibitors and polymer corrosion inhibitors according to their chemical composition. Compared with small molecule corrosion inhibitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/12C07C233/38C23F11/14
CPCC07C231/12C07C233/38C23F11/145
Inventor 付朝阳陈天奇陈展陈梦金
Owner HUAZHONG UNIV OF SCI & TECH
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