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A multi-active adsorption center corrosion inhibitor composition and its preparation method

An active adsorption and corrosion inhibitor technology, applied in the field of corrosion inhibitor composition and its preparation, multi-active center corrosion inhibitor composition and its preparation, can solve the problem of weak temperature adaptability and poor film formation on the surface of metal internal components Stability and other issues, to achieve strong hydrophobicity, strengthen the surface adsorption binding force, improve the effect of electron donating ability

Active Publication Date: 2017-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art and the problems in operation, in order to overcome the defects of weak temperature adaptability of the existing alkyl imidazoline and amides and other corrosion inhibitors, unstable film formation on the surface of some metal internal components, etc., the present invention provides a A kind of corrosion inhibitor composition with organosilicon as the main chain having good thermal stability, excellent surface film-forming properties and stable anti-corrosion film structure and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 10 g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 2000 (active hydrogen content is about 0.5 wt%) and 1 g of 4-vinylpyridine containing 0.1 wt% hydroquinone inhibitor, add 350 mL of ethanol In a round-bottomed flask, stir continuously while raising the temperature to 65±5°C in a constant temperature water bath, and then add 10 drops of 0.05mol / L chloroplatinic acid ethanol solution with a dropper. The reaction process is carried out under nitrogen protection for 5 hours, and the reaction The mixture was subjected to distillation under reduced pressure to remove the solvent. Then pour 400mL of water into the flask while stirring at a high speed, and gradually add about 0.6g of 4-hydroxyaniline during the stirring process, then raise the temperature to 80±5°C, add about 5g of 0.1mol / L sodium hydroxide solution dropwise, After fully reacting for 2 hours, the reaction mixture was distilled off under reduced pressure to remove th...

Embodiment 2

[0029] Take 15g of hydrogen-containing polydimethylsiloxane (active hydrogen content is about 0.5wt%) with an average molecular weight of about 2500 and 1g of 4-vinylpyridine containing 0.1wt% hydroquinone inhibitor, add 450mL of ethanol In a round-bottomed flask with continuous stirring, the temperature was raised to 65±5°C in a constant temperature water bath, and then 10 drops of 0.05mol / L chloroplatinic acid ethanol solution was added with a dropper. The reaction process was carried out under nitrogen protection for 8 hours, and the reaction The mixture was subjected to distillation under reduced pressure to remove the solvent. Then pour 500mL of water into the flask while stirring at a high speed, and gradually add 1.0g of 4-hydroxyaniline during the stirring process, then raise the temperature to 80±5°C, add 5g of 0.1mol / L sodium hydroxide solution dropwise, and fully react After 4 hours, the solvent was distilled off from the reaction mixture under reduced pressure, and...

Embodiment 3

[0031]Take 10 g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 2000 (active hydrogen content is about 0.5 wt%) and 1 g of 4-vinylpyridine containing 0.1 wt% hydroquinone inhibitor, add 350 mL of ethanol In a round-bottomed flask with continuous stirring, the temperature was raised to 65±5°C in a constant temperature water bath, and then 10 drops of 0.05mol / L chloroplatinic acid ethanol solution was added with a dropper. The reaction process was carried out under nitrogen protection for 8 hours, and the reaction The mixture was subjected to distillation under reduced pressure to remove the solvent. Then pour 450mL of water into the flask while stirring at high speed, and gradually add 1.0g of p-hydroxydiphenylamine during the stirring process, then raise the temperature to 80±5°C, add 5g of 0.1mol / L sodium hydroxide solution dropwise, fully After reacting for 4 hours, the reaction mixture was distilled off under reduced pressure to remove ...

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Abstract

The invention relates to a multi-active adsorption center corrosion inhibitor composition and a preparation method thereof. The corrosion inhibitor composition comprises hydrogen-containing polydimethylsiloxane, a vinyl pyridine compound, aniline hydrochloride, a chloroplatinic acid ethanol solution, a basic catalyst, a solvent A and a solvent B. The corrosion inhibitor composition disclosed by the invention is obtained by grafting vinylpyridine and hydroxyaniline substituent groups with high adsorptivity on metal surfaces by taking the linear hydrogen-containing polydimethylsiloxane as a basic raw material at a certain temperature and under the action of the catalyst. Compared with the prior art, the corrosion inhibitor composition has the advantages of relatively high application temperature, relatively high adsorption film-forming stability, low amount and good lasting corrosion resistance, and is a novel efficient metal surface corrosion inhibitor.

Description

technical field [0001] The invention relates to a corrosion inhibitor composition and a preparation method thereof, in particular to a multi-active center corrosion inhibitor composition which can significantly reduce the corrosion rate of the inner wall of a metal pipeline and effectively improve the corrosion resistance of the device, and a preparation method thereof. It belongs to the field of metal corrosion protection. Background technique [0002] Corrosion inhibitor is a kind of anti-corrosion chemical, which is a chemical substance or a mixture of several chemical substances that exist in the environment (medium) in appropriate concentration and form, and can prevent or slow down corrosion. For half a century, the variety of corrosion inhibitors has been continuously updated and the quality has been continuously improved. They have played an irreplaceable role in slowing down corrosion and prolonging the life of equipment. Corrosion inhibitors have become one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/173
Inventor 孙鹏刘纾言王鑫
Owner CHINA PETROLEUM & CHEM CORP
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