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Vapor phase corrosion inhibitor and preparation method thereof

A technology of gas phase corrosion inhibitor and benzoic acid, which is applied in the field of gas phase corrosion inhibitor and its preparation, can solve the problems of poor corrosion inhibition effect, achieve the effect of enhancing corrosion inhibition effect, improving volatile performance and gas phase corrosion inhibition ability

Inactive Publication Date: 2017-11-17
常州杰轩纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a gas-phase corrosion inhibitor and its preparation method in view of the defect that the currently used single-component gas-phase corrosion inhibitor has poor corrosion inhibition effect during use

Method used

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  • Vapor phase corrosion inhibitor and preparation method thereof

Examples

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Effect test

example 1

[0021] Weigh 20g of cysteine, 200mL of ether and 10g of benzoic acid into a three-necked flask equipped with a thermometer and a reflux device, place the three-necked flask in a water bath, control the temperature of the water bath to 50°C, stir and mix for 1min, and then add 0.1mL mass fraction is 96% sulfuric acid solution, stirred and reacted for 2h, filtered after the reaction to obtain the filter residue, that is, benzoic acid-modified cysteine, and finally in parts by weight, get 20 parts of benzoic acid-modified cysteine , 10 parts of catechol, 1 part of dicyclohexyl ammonium nitrite, and 60 parts of water were added to the mixer, stirred and mixed for 15 minutes, and charged to obtain a gas phase corrosion inhibitor.

example 2

[0023] Weigh 20g of cysteine, 200mL of ether and 10g of benzoic acid into a three-necked flask equipped with a thermometer and a reflux device, place the three-necked flask in a water bath, control the temperature of the water bath to 50°C, stir and mix for 1min, and then add 0.1mL mass fraction is 96% sulfuric acid solution, stirred and reacted for 2h, filtered after the reaction to obtain the filter residue, that is, benzoic acid-modified cysteine, and finally in parts by weight, get 20 parts of benzoic acid-modified cysteine , 10 parts of catechol, 6 parts of N-oleoyl sarcosine, 1 part of dicyclohexyl ammonium nitrite and 60 parts of water are added to the mixer, stirred and mixed for 15 minutes, and charged to obtain a gas phase corrosion inhibitor.

example 3

[0025] Weigh 20g of cysteine, 200mL of ether and 10g of benzoic acid into a three-necked flask equipped with a thermometer and a reflux device, place the three-necked flask in a water bath, control the temperature of the water bath to 50°C, stir and mix for 1min, and then add 0.1mL of sulfuric acid solution with a mass fraction of 96%, stirred and reacted for 2h, filtered after the reaction to obtain a filter residue, namely benzoic acid-modified cysteine, at the same time, 400g shells were added to a pulverizer and pulverized for 40min to obtain shell powder. Add powder, 100g diammonium hydrogen phosphate, 60g ammonium dihydrogen phosphate and 800mL water into the hydrothermal kettle, move the hydrothermal kettle into an oven, and react at a temperature of 150°C for 5 hours. After the reaction, place the product in a centrifuge In the machine, centrifuge at a speed of 4000r / min for 5min to obtain a precipitate, add the precipitate, 15g of carbon disulfide, 200g of grape skin a...

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Abstract

The invention relates to a vapor phase corrosion inhibitor and a preparation method thereof and belongs to the technical field of metal vapor phase rust prevention. The vapor phase corrosion inhibitor comprises the following raw materials, by weight, of 20-30 parts of benzoic acid modified cysteine, 10-15 parts of catechol, 6-8 parts of N-oleoyl sarcosine, 1-3 parts of bi-cyclohexyl ammonium nitrate, 3-5 parts of concentrated solutions and 60-80 parts of water. The vapor phase corrosion inhibitor is formed by combining the specific components, especially phenolic hydroxyl in the catechol can form a stable ligand by coordinating with metal and is adhered to the metal surface to genertae a closed protective layer, the N-oleoyl sarcosine can form a stable five-membered ring chelate with metal ions or ferrous ions on the metal surface, the corrosion inhibition effect is further reinforced, and therefore, the vapor phase corrosion inhibitor prepared by the invention has good corrosion inhibition performance.

Description

technical field [0001] The invention relates to a vapor phase corrosion inhibitor and a preparation method thereof, belonging to the technical field of metal vapor phase rust prevention. Background technique [0002] Vapor-phase corrosion inhibitor, also known as volatile corrosion inhibitor, is a chemical that can automatically volatilize gas at room temperature and adsorb on the surface of the metal to prevent metal corrosion. Vapor-phase corrosion inhibitors are easy to use, clean and clean, and have become an important direction in the development of atmospheric corrosion prevention technology. Vapor-phase anti-rust drying material is a new type of gas-phase anti-rust composite material made by treating the gas-phase corrosion inhibitor solution with a desiccant, heating and evaporating water, and combining a gas-phase corrosion inhibitor and a desiccant. Insufficient antirust performance of corrosion inhibitors in high temperature environments. [0003] The formulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCC23F11/02
Inventor 王海霞宋玲
Owner 常州杰轩纺织科技有限公司
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