Assessment of the effects of acetic acid and turbulent flow conditions on the corrosion of API 5L X52 steel in aqueous CO₂ solutions

Abstract

Electrochemical techniques were used to determine the effects of acetic acid and turbulent flow on the corrosion process of pipeline steel in aqueous NaCl solutions saturated with CO 2 at 60 °C. The results showed that in CO 2 ‐saturated NaCl solution the corrosion kinetics is controlled by the mass transfer of reducible ions. The corrosion kinetics was significantly affected by the acetic acid addition. The cathodic limiting current density ( i lim ) can be described as the sum of individual limiting current densities for each reducible ionic species, and an independent flow term, associated with the CO 2 hydration.