Copper corrosion inhibitor and preparation method thereof

A technology of copper corrosion inhibitor and formaldehyde, which is applied in the field of copper corrosion inhibitor and its preparation, can solve the problems that copper and its alloys are prone to corrosion, limit the wide application of copper, shorten the service life, etc., achieve excellent corrosion inhibition performance, slow down Corrosion of copper, good water solubility effect

Inactive Publication Date: 2020-12-04
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although copper has poor activity in metals, in a medium system containing corrosive particles such as chloride ions, sulfates, and nitrates, copper and its alloys are prone to corrosion, shortening their service life, and losing their original excellent properties. , which greatly limits the wide application of copper

Method used

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  • Copper corrosion inhibitor and preparation method thereof
  • Copper corrosion inhibitor and preparation method thereof
  • Copper corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a three-necked flask equipped with a stirring and reflux condenser, add ethanolamine, formaldehyde and benzotriazole in a ratio of 1:1.1:1, add a certain amount of hydrochloric acid to adjust the pH of the mixture to 1, and turn on the reflux condensing device , heated to 90°C in a water bath, stirred magnetically, and reacted for 5 hours, and distilled off excess formaldehyde under reduced pressure.

[0021] (1) Structural characterization of corrosion inhibitors

[0022] Infrared characterization and nuclear magnetic characterization were carried out on the synthesized product, the results are detailed in figure 1 and figure 2 , to determine the chemical structure of the synthetic product is:

[0023]

[0024] Depend on figure 1 Medium data, 744cm -1 The absorption peak at is the C-H deformation vibration on the ortho-disubstituted aromatic ring; 3000cm -1 The absorption peak at 1496 is the C=C skeleton stretching vibration on the aromatic ring; the absorp...

Embodiment 2

[0037] In a three-necked flask equipped with a stirring and reflux condenser, add ethanolamine, formaldehyde and benzotriazole in a ratio of 1:1.2:1, add a certain amount of hydrochloric acid to adjust the pH of the mixture to 1.5, and turn on the reflux condensing device , heated in a water bath to 110°C, stirred magnetically, and reacted for 4 hours, distilled off excess formaldehyde under reduced pressure.

[0038] The product was characterized by infrared and NMR, and its structure was completely consistent with that of Example 1.

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Abstract

The invention relates to the technical field of metal corrosion and protection, and discloses a copper corrosion inhibitor and a preparation method thereof. The copper corrosion inhibitor is Mannich base obtained through a heating reflux reaction of ethanolamine, formaldehyde and benzotriazole according to a certain proportion, is a mixed corrosion inhibitor with an anode as the main component, isremarkable in corrosion inhibition effect, and has safe and environment-friendly effects.

Description

technical field [0001] The invention relates to the technical field of metal corrosion and protection, in particular to a copper corrosion inhibitor and a preparation method thereof. Background technique [0002] Copper has excellent mechanical strength, machinability, electrical conductivity, weldability and other characteristics, and is widely used in heat exchange systems in industries such as electric power and ships. Although copper has poor activity in metals, in a medium system containing corrosive particles such as chloride ions, sulfates, and nitrates, copper and its alloys are prone to corrosion, shortening their service life, and losing their original excellent properties. , which greatly limits the wide application of copper. The study found that the corrosion inhibitors containing nitrogen heterocycles have excellent corrosion inhibition performance on copper and its alloys in solutions containing chloride ions. Contents of the invention [0003] The inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D249/18C23F11/14
CPCC07D249/18C23F11/149
Inventor 李克华王任芳李克娥颜涛张娇玉杨冰冰
Owner YANGTZE UNIVERSITY
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