Effects of Oxygen on Corrosion Inhibition in Sweet Systems

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Abstract This research investigates the impact of oxygen on a representative corrosion inhibitor's efficacy in oil-water systems, a crucial concern in petroleum engineering. Electrochemical experiments were conducted to explore the relationship between dissolved oxygen and the performance of the inhibitor formulation for various oil-water mixtures. Linear polarization resistance (LPR) and potentiodynamic polarization methods were employed to assess corrosion behavior in the presence and absence of the inhibitor, under both oxygenated and oxygen-free conditions. The findings indicate that oxygen plays a significant role in inhibitor effectiveness, with potential implications for corrosion control strategies. Variations in corrosion rates and polarization characteristics were observed between oxygenated and deoxygenated environments. In the oxygen-containing system, the cathodic polarization curves revealed two distinct limiting currents, attributed to oxygen reduction and hydrogen ion reduction processes. This study offers insights into oxygen-influenced corrosion and inhibition mechanisms in oil-water systems, contributing to the advancement of more effective corrosion prevention approaches in the petroleum sector.

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