Abstract

As an attempt to contribute to the understanding of the cor- rosion process of steel by hydrogen sulfi de (H2S), the corro- sion behavior of an X70 pipeline steel immersed in several H2S-containing solutions is analyzed in this work. Linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) techniques were used in order to charac- terize the corrosion behavior of X70 steel in H2S-containing solutions. Electrochemical parameters such as charge-transfer resistance, Rct, polarization resistance, Rp, and corrosion rate are presented in this work. Additionally, a comparison be- tween static and turbulent fl ow conditions was made in order to describe the corrosion behavior of X70 steel. Turbulent fl ow conditions were controlled using the rotating cylinder electrode (RCE) (at 1,000 rpm) in a saturated H2S solution.

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