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Application of efficient copper seawater corrosion inhibitor

A technology of corrosion inhibitor and seawater, applied in the field of thiazole corrosion inhibitor, can solve the problems of difficulty in meeting environmental protection requirements, inability to achieve non-toxicity, environmental protection, low cost, and high hazard.

Inactive Publication Date: 2011-09-14
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-N,N-dimethylamine-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, and make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-N,N dimethylamine -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 there is no obvious corrosion; the corrosion inhibition efficiency is tested through experiments: 87.2% in weight loss, 83.6% in electrochemical impedance spectroscopy, and 90.4% in dynamical polarization.

Embodiment 2

[0018] Dissolve (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-N,N-dimethylamine-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, and make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-N,N dimethylamine -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-N,N-dimethylamine-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, and make (5-methyl-[1,3,4]thiadiazole-2-mercapto)-acetic acid (4-N,N dimethylamine -benzylidene)-hydrazide content to 1 mg, control the pH value to 8.5, and immerse at 15°C for 72 hours.

[0022] Observe the surface of the copper sheet, it is uniform and bright, and there is no obvious corrosion; the corrosion inhibition efficiency is tested through the test: weight loss is 89.4%, electrochemical impedance spectroscopy is 88.5%, and potentiodynamic polarization is 91.9%.

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Abstract

The invention relates to application of a copper seawater corrosion inhibitor. The copper seawater corrosion inhibitor can be used for inhibiting the corrosion of copper in seawater. The inhibitor is prepared by dissolving (5-methyl-[1,3,4] thiadiazole-2-mercapto)-acetic acid (4-N,N dimethyl amino-benzylidene)-hydrazide in a solvent, and then compounding with an emulsifying agent. The inhibitor provided by the invention is low in toxicity and is efficient and environment-friendly.

Description

technical field [0001] The invention relates to the application of a copper seawater corrosion inhibitor, in particular to an environmentally friendly and efficient 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 attent...

Claims

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Application Information

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IPC IPC(8): C23F11/16
Inventor 梁轶聪李佃场王漪
Owner 南通市星期七旅游开发有限公司