Azacyclo-modified polysiloxane corrosion inhibitor composition and preparation method thereof

Abstract

The invention relates to an azacyclo-modified polysiloxane corrosion inhibitor composition and a preparation method thereof. The corrosion inhibitor composition contains hydrogen-containing polydimethyl siloxane, hydroxy carbazole, vinylcarbazole, a chloroplatinic acid ethanol solution, a basic catalyst, a solvent A and a solvent B. The preparation method of the azacyclo-modified polysiloxane corrosion inhibitor composition comprises the steps: adding hydroxy carbazole and the solvent A into hydrogen-containing polydimethyl siloxane, then, adding the basic catalyst at the temperature of 75-90 DEG C, reacting, then, filtrating and distilling at reduced pressure, so as to obtain a primary product W; adding the solvent B and vinylcarbazole into the W, heating to the temperature of 90-140 DEG C, then, dropwise adding the chloroplatinic acid ethanol solution, reacting to obtain a mixture, filtrating the mixture, and removing the solvent, thereby obtaining the corrosion inhibitor composition. According to the azacyclo-modified polysiloxane corrosion inhibitor composition and the preparation method thereof, the product has higher applicable temperature and stronger adsorbing and film forming stability, a formed film is better in hydrophobicity and insulativity, the protective action is better, the consumption is low, and the sustained corrosion resistance is good.

Description

technical field [0001] The invention relates to a corrosion inhibitor composition and a preparation method thereof, in particular to a nitrogen heterocyclic group-modified polysiloxane corrosion inhibitor composition capable of inhibiting the corrosion rate of the inner wall of a metal pipeline in a corrosive medium and The preparation method 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 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 characteri...

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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