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Application of copper seawater corrosion inhibitor

A corrosion inhibitor, seawater technology, applied in the application field of copper seawater corrosion inhibitor, can solve the problems of high toxicity, large dosage, inability to be non-toxic, environmentally friendly, and low cost.

Inactive Publication Date: 2011-07-06
南通市星期七旅游开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Seawater is highly corrosive to copper, which inhibits the application of copper products in the field of marine development. In response to this problem, humans have developed a variety of copper seawater corrosion inhibitors, such as the most commonly used nitrites, phosphates, polymers, etc. Inorganic corrosion inhibitors such as phosphates, carbonates, silicates, borates, and chromates, as well as organic corrosion inhibitors such as benzotriazole compounds, but the synthesis routes and processes of these corrosion inhibitors There are still many deficiencies, it is difficult to meet the requirements of environmental protection, and it is impossible to achieve the goal of non-toxic, environmental protection and low cost
[0003] With the attention of human beings and the further advancement of green chemical technology, the development and application of environmentally friendly corrosion inhibitors have been developed by leaps and bounds, but there are still a lot of problems that need to be solved urgently, such as large dosage, high toxicity, and accompanying production process. Hazardous industrial by-products and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy-benzylidene)-hydrazide in cyclohexanone solvent , and then compounded with emulsifier op-10 to make corrosion inhibitor microemulsion. Immerse the copper sheet in 1L of seawater, add the above-mentioned corrosion inhibitor microemulsion to make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy -benzylidene)-hydrazide content to 0.5 mg, control the pH value to 7.5, and immerse at 25°C for 72 hours.

[0016] Observing the surface of the copper sheet, it is uniform and bright, and no obvious corrosion occurs; the corrosion inhibition efficiency is tested through experiments: 87.2% in weight loss, 85.6% in electrochemical impedance spectroscopy, and 91.2% in dynamical polarization.

Embodiment 2

[0018] Dissolve (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy-benzylidene)-hydrazide in cyclohexanone solvent , and then compounded with emulsifier op-10 to make corrosion inhibitor microemulsion. Immerse the copper sheet in 1L of seawater, add the above-mentioned corrosion inhibitor microemulsion to make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy -benzylidene)-hydrazide content to 50mg, control the pH value to 7.5, and immerse at 25°C for 72 hours.

[0019] Observing the surface of the copper sheet, it is uniform and bright, and there is no obvious corrosion; the corrosion inhibition efficiency is tested through experiments: 93.2% in weight loss, 92.8% in electrochemical impedance spectroscopy, and 97.0% in dynamical polarization.

Embodiment 3

[0021] Dissolve (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy-benzylidene)-hydrazide in cyclohexanone solvent , and then compounded with emulsifier op-10 to make corrosion inhibitor microemulsion. Immerse the copper sheet in 1L of seawater, add the above-mentioned corrosion inhibitor microemulsion to make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-hydroxy-3-methoxy -benzylidene)-hydrazide content to 10 mg, control the pH value to 7.5, and immerse at 15°C for 72 hours.

[0022] Observing the surface of the copper sheet, it is uniform and bright without obvious corrosion; the corrosion inhibition efficiency is tested through experiments: weight loss 91.4%, electrochemical impedance spectroscopy 90.5%, and potentiodynamic polarization 92.1%.

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PUM

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Abstract

The invention provides a copper seawater corrosion inhibitor for inhibiting the corrosion of copper in seawater. The corrosion inhibitor is prepared by dissolving (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid(4-hydroxy-3-methoxy-benzylidene)-hydrazide in a solvent and compounding with an emulsifier. The corrosion inhibitor has low toxicity and high efficiency and is environmental-friendly.

Description

technical field [0001] The invention relates to the application of a copper seawater corrosion inhibitor, in particular to the application of a thiazole corrosion inhibitor. Background technique [0002] Seawater is highly corrosive to copper, which inhibits the application of copper products in the field of marine development. In response to this problem, humans have developed a variety of copper seawater corrosion inhibitors, such as the most commonly used nitrites, phosphates, polymers, etc. Inorganic corrosion inhibitors such as phosphates, carbonates, silicates, borates, and chromates, as well as organic corrosion inhibitors such as benzotriazole compounds, but the synthesis routes and processes of these corrosion inhibitors There are still many deficiencies, it is difficult to meet the requirements of environmental protection, and it is impossible to achieve the goals of non-toxicity, environmental protection and low cost. [0003] With the attention of human beings a...

Claims

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Application Information

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IPC IPC(8): C23F11/16
Inventor 李佃场梁轶聪魏志刚
Owner 南通市星期七旅游开发有限公司