Effects of Different Ions on the Corrosion Behavior of SM 80SS Tubing Steel in CO₂/H₂S Containing Aqueous Solution

Abstract:

As an attempt to contribute to the understanding of the corrosion processes of anti-sulfur steel in CO₂ and H₂S containing environment with different species, the corrosion behavior of SM 80SS tubing steel immersed in CO₂ and H₂S containing solution was analyzed in this work. To determine the corrosion behavior of SM80SS steel, the linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) techniques were used, as well as weight loss test and surface analysis. The results showed that the presence of Cl^- quickened the anodic dissolution processes and rapidly increased the corrosion rate of SM 80SS steel, and that the addition of Ca²⁺ and Mg²⁺ reduced corrosion rate. The corrosion processes of SM 80SS steel were controlled by the electrochemical reaction in the initial period and then converted to be controlled by electrochemical and activation reaction with increasing Cl^-. Keywords: SM 80SS tubing steel; CO₂/H₂S corrosion; EIS; Chloride; Ca²⁺ + Mg²⁺

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1367-1373
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1367
• Online since: August 2013
• Authors: Guan Fa Lin*, Xun Chang Dong, Shi Dong Zhu, Zhen Quan Bai
• Keywords: Ca²⁺ + Mg²⁺, Chloride, Co₂/h₂S Corrosion, EIS, Sm 80SS Tubing Steel

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