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Modified polysiloxane corrosion inhibitor composition and preparation method thereof

A polysiloxane and corrosion inhibitor technology, applied in the field of metal corrosion protection, can solve the problems of unstable film formation on the surface of metal internal components, weak temperature adaptability, etc.

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems and deficiencies of the prior art, in order to overcome the defects such as weak temperature adaptability of existing alkylimidazolines and amides and other corrosion inhibitors, and unstable film formation on the surface of some metal internal components, the present invention provides a Composite corrosion inhibitor with polysiloxane macromolecule as the main chain and grafted nitrogen heterocyclic compound with excellent thermal stability, excellent surface adsorption characteristics and stable anti-corrosion film structure and its preparation method

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  • Modified polysiloxane corrosion inhibitor composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 20g of hydrogen-containing polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 1.5g of 2-vinylindole with an average molecular weight of about 800, put them into a round-bottomed flask filled with 200mL of toluene, and blow nitrogen Stir continuously at the same time, raise the temperature to 85±5°C in a constant temperature water bath, add about 15 drops of 0.05mol / L chloroplatinic acid ethanol solution after the temperature is stable, fully react for 5 hours, distill the reaction mixture under reduced pressure to remove the solvent and filter out impurities , that is, to obtain the active component of the target product modified polysiloxane corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. The synthetic product is uniformly dispersed in hydrotreated diesel oil at a ratio of 1%wt to ob...

Embodiment 2

[0020] Take 20g of hydrogen-containing polydimethylsiloxane (with an active hydrogen content of about 0.5wt%) and 2.0g of 2-vinylindole with an average molecular weight of about 800, put them into a round-bottomed flask filled with 150mL of toluene, and blow nitrogen Stir continuously at the same time, raise the temperature to 85±5°C in a constant temperature water bath, add about 15 drops of 0.05mol / L chloroplatinic acid ethanol solution after the temperature stabilizes, fully react for 8 hours, distill the reaction mixture under reduced pressure to remove the solvent and filter out impurities , that is, to obtain the active component of the target product modified polysiloxane corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. The synthetic product is uniformly dispersed in hydrotreated diesel oil at a ratio of 1%wt to o...

Embodiment 3

[0022] Take 20g of hydrogen-containing polydimethylsiloxane with an average molecular weight of about 1000 (active hydrogen content is about 0.5wt%) and 1.5g of 2-vinylindole, put them into a round bottom flask filled with 250mL of toluene, and blow nitrogen Stir continuously at the same time, raise the temperature to 95±5°C in a constant temperature water bath, add about 15 drops of 0.05mol / L chloroplatinic acid ethanol solution after the temperature is stable, fully react for 5 hours, distill the reaction mixture under reduced pressure to remove the solvent and filter out impurities , that is, to obtain the active component of the target product modified polysiloxane corrosion inhibitor. The content of residual active hydrogen in the target product is determined by nuclear magnetic resonance internal standard method to be less than 0.01%wt., and the product is qualified. The synthetic product is uniformly dispersed in hydrotreated diesel oil at a ratio of 1%wt to obtain a co...

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Abstract

The invention relates to a modified polysiloxane corrosion inhibitor composition and a preparation method thereof and belongs to the field of metal material corrosion prevention. The modified polysiloxane corrosion inhibitor composition contains hydrogen polydimethylsiloxane, a 2-vinyl indole derivative, a platinum catalyst and a solvent. The modified polysiloxane corrosion inhibitor composition is prepared in such a way that the hydrogen polydimethylsiloxane and the 2-vinyl indole derivative react as basic raw materials at a certain temperature in the presence of the catalyst. Compared with the prior art, the modified polysiloxane corrosion inhibitor composition has higher applicable temperature and higher adsorption film forming stability; a film formed by the modified polysiloxane corrosion inhibitor composition has better hydrophobicity and insulativity and a better protective effect; and the modified polysiloxane corrosion inhibitor composition is low in usage amount and high in continuous corrosion resistance and is a novel efficient metal surface corrosion inhibitor.

Description

technical field [0001] The invention relates to a corrosion inhibitor and a preparation method thereof, in particular to a modified polysiloxane corrosion inhibitor capable of suppressing the corrosion rate of the inner wall of a metal pipeline in a corrosive medium and a preparation method thereof, belonging 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 in an appropriate concentration and form to prevent or slow down corrosion. As the varieties of corrosion inhibitors are continuously updated and the quality is continuously improved, they play an irreplaceable role in slowing down corrosion and prolonging the life of equipment. Corrosion inhibitors have become one of the important anti-corrosion measures. Corrosion inhibitors have the characteristics of high selectivity, loss, pollution,...

Claims

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Application Information

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IPC IPC(8): C23F11/173
Inventor 孙鹏王鑫刘纾言
Owner CHINA PETROLEUM & CHEM CORP
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