Triazole compound as well as preparation method and application thereof

A triazole and compound technology, applied in the field of nitrogen-containing heterocyclic corrosion inhibitors, can solve the problems of scarcity of corrosion inhibitors, poor activity, loss of performance, etc., and achieve good durability, low cost, and the effect of inhibiting damage

Inactive Publication Date: 2012-12-05
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although copper ranks after hydrogen in the metal activity sequence table, and its activity is poor, copper is also extremely susceptible to corrosion damage to varying degrees in systems containing chloride ions, sulfates, nitrates and other corrosive media, thus Lose its original various performances, and even bring huge disasters
[0004] At present, although there have been many reports on seawater corrosion inhibitors for metallic copper, the number of corrosion inhibitors that can be used in actual production is extremely rare, and most of them still use traditional benzotriazole compounds as copper corrosion inhibitors. agent, which brings a series of economic and environmental problems to the production process

Method used

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  • Triazole compound as well as preparation method and application thereof
  • Triazole compound as well as preparation method and application thereof
  • Triazole compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 4-(furan-2-methyleneamine)-5-phenyl-4H-1,2,4-triazole-3-thiol Preparation method:

[0025] The chemical reaction equation is:

[0026]

[0027] First, benzoic acid is mixed with methanol, and the reaction dehydration is obtained to obtain methyl benzoate (I), and the product (I) and hydrazine hydrate are refluxed in an ethanol solvent at a molar ratio of 1:1.5 to 1:2 for 2 to 3 hours to obtain benzoyl Hydrazine (II), add the obtained reaction product (II) to the ethanol solution of potassium hydroxide with a mass ratio of 1:5-10, slowly add carbon disulfide dropwise, react at room temperature for 4 hours, and generate potassium salt compound (III), carbon disulfide The dropwise addition is to use a dropper to add dropwise at a rate of 1 drop / 4-5 seconds for 30-60 minutes; react the product (III) with excess hydrazine hydrate, heat and reflux for 6 hours, pour the reaction solution into ice water, and use dilute Adjust the pH value to 4-5 with hydrochloric acid, and ...

Embodiment 2

[0035] Conditions: The experimental material is red copper (99.999%), and 4-(furan-2-methyleneamine)-5-phenyl-4H-1,2,4-triazole-3-thiol and emulsifier are prepared Form a microemulsion, the medium is 3.5% sodium chloride solution, the dosage is 0.5L, add 4-(furan-2-methyleneamine)-5-phenyl-4H-1,2,4-triazole-3- The effective content of mercaptan is 0.025g, the temperature is 25°C, and the pH=7.5.

[0036] The corrosion inhibition efficiencies obtained through experimental tests are: electrochemical impedance spectroscopy 71.2%, dynamic potential polarization 70.7%, showing that it is a corrosion inhibitor with low dosage and high efficiency.

Embodiment 3

[0038] Conditions: The experimental material is red copper (99.999%), and 4-(furan-2-methyleneamine)-5-phenyl-4H-1,2,4-triazole-3-thiol and emulsifier are prepared Form a microemulsion, the medium is 3.5% sodium chloride solution, the dosage is 0.5L, add 4-(furan-2-methyleneamine)-5-phenyl-4H-1,2,4-triazole-3- The effective content of mercaptan is 0.030g, the temperature is 25°C, and the pH=7.5.

[0039] The corrosion inhibition efficiencies obtained through experimental tests are: 81.5% in electrochemical impedance spectroscopy and 78.9% in dynamic potential polarization, showing that it is a corrosion inhibitor with low dosage and high efficiency.

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Abstract

The invention relates to a copper corrosion inhibitor used in seawater or a sodium chloride solution, in particular to preparation and application of a low-toxicity and high-efficiency corrosion inhibitor for inhibiting the corrosion of metal copper and products thereof in seawater or a sodium chloride medium. A triazole compound is 4-(furan-2-methylene amine)-5-phenyl-4H-1,2,4-triazole-3-thiol shown as a structural formula in the specifications. The triazole compound can be used as a copper seawater corrosion inhibitor for performing corrosion prevention on a copper product in the seawater or the sodium chloride medium. The corrosion inhibitor has the advantages of small using amount, low toxicity, high efficiency, strong capability in durative action and wide application prospect, can be used for effectively inhibiting corrosive destruction to the metal copper.

Description

technical field [0001] The invention relates to a seawater corrosion inhibitor for copper, namely a low-toxicity, high-efficiency nitrogen-containing heterocyclic corrosion inhibitor for inhibiting the corrosion of metal copper and its products in seawater or sodium chloride medium and its application. Background technique [0002] With the continuous consumption of various resources on land, the development and utilization of marine resources has become an inevitable way to solve the current resource depletion. However, seawater is a strong electrolyte solution with strong corrosiveness, which greatly limits the development and utilization of marine resources. Therefore, only by solving the corrosion problem of metal materials in seawater can the development and utilization value of marine resources be truly reflected. [0003] Copper has excellent mechanical strength, machinability, electrical conductivity, thermal conductivity, weldability and other characteristics, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D405/12C23F11/16
Inventor 李伟华曹琨田惠文白雪侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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