Comprehensive Study of the Action of Corrosion Inhibitors Based on Quaternary Ammonium Compounds in Solutions of Hydrochloric and Sulfamic Acids
Silin Mikhail,
Magadova Lyubov,
Davletshina Lucia,
Poteshkina Kira,
Kotekhova Viktoriia,
Galkina Alexandra
Affiliations
Silin Mikhail
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Magadova Lyubov
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Davletshina Lucia
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Poteshkina Kira
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Kotekhova Viktoriia
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Galkina Alexandra
Department of Technology of Chemicals Substances for the Oil and Gas Industry, National University of Oil and Gas «Gubkin University», Leninsky Prospekt 65, 119991 Moscow, Russia
Acid treatments are one of the methods for intensifying oil and gas production. Corrosion is a significant factor affecting the performance of oilfield equipment. There are many different methods of preventing corrosion, but corrosion inhibitors are most commonly used in industry. The protective effect of the inhibitor is directly determined by the effective adsorption of surfactants on the metal surface. For an indirect assessment of the adsorption of the inhibitor, a comprehensive research method is proposed based on the determination of the interfacial tension of acid compositions and steel plates’ contact angle of wetting after corrosion tests. It was found that in hydrochloric acid the adsorption of the inhibitor IC-1 reaches a maximum after 6 h, an increase in the acid concentration in the range of 5–15% wt. has a negative effect on the activity of the inhibitor. For sulfamic acid, the maximum adsorption of the IC-2 inhibitor is observed after 24 h, an increase in acid concentration has a positive effect on surfactants.
