2009•Unpublished venueRequires access

Effect of the Imidazoline Concentration on the Inhibitor Film in Salt Solution with Saturated CO_2

Wang Ning

Abstract

Imidazoline derivative inhibitors are widely used in protection of oil field pipe instrument for CO2 corrosion and their inhibition mechanism is mainly chemical adsorption.The paper focused on the inhibitor concentration and the inhibition performance changing with time.The performance and the growth and decay law of film formed on Q235 steel in saturated carbon dioxide salt solution were studied by weight loss,polarization curve and EIS.The results showed that there was a limited content at 85 ℃,which was 40 mg·L-1.At the limited content,the film was formed after 24 h and last 120 h at least.

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Key concepts: Imidazoline receptor, Corrosion, Adsorption, Salt (chemistry), Carbon steel, Polarization (electrochemistry), Corrosion inhibitor, Carbon dioxide