Corrosion inhibitor and preparation and application thereof

Abstract

The invention discloses a corrosion inhibitor and preparation and application thereof. The corrosion inhibitor consists of the following components by total weight of the corrosion inhibitor: 1 to 15 weight percent of imidazoline ester, 1 to 10 weight percent of corrosion inhibition auxiliary and 5 to 50 weight percent of solvent. At a temperature of 30 to 130 DEG C, the corrosion inhibitor has good film forming property, has excellent dispersibility and solubility property and has the corrosion inhibition rate of over 86 percent under the condition of an additive amount of 20 to 50mg / L.

Description

field of invention [0001] The invention relates to the addition of corrosion inhibitors to equipment for processing or converting hydrocarbon oils, in particular to an anti-CO 2 Corrosion inhibitors and their preparation and application. Background technique [0002] During oil and gas development, CO 2 It is often produced as associated gas at the same time, and the accompanying liquid-phase corrosive medium usually includes condensate oil in gas wells, oilfield water and its mixture. As the water cut in the oil well increases, the deep layer contains CO 2 The development of oil and gas reservoirs is increasing, CO injection 2 General promotion of enhanced oil recovery technology, CO 2 Corrosion has become an extremely prominent problem that plagues the development of the oil and gas industry and has attracted widespread attention. [0003] Humid CO 2 It will cause rapid general corrosion and severe local corrosion of steel, causing early corrosion failure of pipeline...

AI Technical Summary

Problems solved by technology

[0006] All of the above corrosion inhibitors can be applied to CO 2 Corrosive systems, and have good CO control 2 Corrosion effect, but there are still some deficiencies. Some corrosion inhibitors have a narrow use range and lose their protective effect with the change of corrosion system temperature; some corrosion inhibitors have unstable film-forming performance and are easy to damage defects; Corrosion inhibitors have good film-forming properties but poor water solubility and solubility; some corrosion inhibitors have a single component and cannot play a synergistic effect.

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