Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater

A technology of corrosion inhibitors and alcohols, applied in the field of heterocyclic alcohol corrosion inhibitors, can solve the problems of scarcity of corrosion inhibitors, poor activity, corrosion damage and other problems, and achieve the effect of convenient purchase, low cost and inhibition of damage

Inactive Publication Date: 2012-07-04
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Application of heterocyclic alcohol high-efficiency corrosion inhibitor for cupper in seawater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Conditions: the experimental material is red copper (99.999%), hexaconazole and emulsifier are formulated into microemulsion, the medium is 3.5% sodium chloride solution, the dosage is 100L, the effective content of hexaconazole is 0.05g, and the temperature is 25°C. pH=7.5, immersion time is 20 days.

[0018] The corrosion inhibition efficiency obtained through the test is: weight loss 86.9%, electrochemical impedance spectrum 86.7%, dynamic potential polarization 91.2%, showing that it is a corrosion inhibitor with low dosage and high efficiency.

Embodiment 2

[0020] Conditions: The experimental material is red copper (99.999%), hexaconazole and emulsifier are formulated into microemulsion, the medium is 3.5% sodium chloride solution, the dosage is 100L, the effective content of hexaconazole is 0.06g, and the temperature is 25°C. pH=7.5, immersion time is 20 days.

[0021] The corrosion inhibition efficiencies obtained through experimental tests are: weight loss 91.2%, electrochemical impedance spectroscopy 90.6%, and dynamic potential polarization 92.8%, showing that it is a corrosion inhibitor with low dosage and high efficiency.

Embodiment 3

[0023] Conditions: the experimental material is red copper (99.999%), hexaconazole and emulsifier are formulated into microemulsion, the medium is 3.5% sodium chloride solution, the dosage is 100L, the effective content of hexaconazole is 0.08g, and the temperature is 25°C. pH=7.5, immersion time is 20 days.

[0024] The corrosion inhibition efficiencies obtained through experiments are: weight loss 93.4%, electrochemical impedance spectroscopy 93.8%, and potentiodynamic polarization 95.4%, showing that it is a corrosion inhibitor with low dosage and high efficiency.

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Abstract

The invention relates to a corrosion inhibitor for copper in seawater or sodium chloride solution, namely a low-toxicity and high-efficiency corrosion inhibitor used for inhibiting the corrosion of metallic copper and products thereof in the seawater or a sodium chloride medium and application thereof. The corrosion inhibitor has an active component of hexaconazole (alias: (RS)-2-(2,4-dichlorophenyl)-1-(1H-1,2,4-triazole)-1-yl)-hexyl-2-alcohol). The product can prevent the general corrosion and the local corrosion of the metallic cupper in the process of contacting the seawater or the sodium chloride solution. At present, the compound has been industrially produced on a large scale, and has been widely applied to agricultural production, but the compound has not been used as a metal corrosion inhibitor. The corrosion inhibitor has the advantages of low use level, low toxicity, high efficiency, strong lasting action, effective inhibition of corrosion and damage of the metallic cupper and wide application prospect.

Description

technical field [0001] The invention relates to a seawater corrosion inhibitor for copper, namely a low-toxicity and high-efficiency heterocyclic alcohol corrosion inhibitor used to inhibit 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 has been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14
Inventor 李伟华胡李超刘奉令侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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