New insights on the role of CO2 in the mechanism of carbon steel corrosion

• DOI: 10.1016/j.corsci.2017.02.016
• Publication Date: 2017-02-11T07:46:03Z
• Authors: Tatiana das Chaga...; Merlin Cristina E...; Rogaciano Maia Mo...; Oscar Rosa Mattos
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

Abstract CO 2 corrosion is an important process affecting oil and gas industries. Understanding the role of CO 2 in the mechanism of carbon steel dissolution may contribute to better predict corrosion rate. Impedance, local pH and weight loss tests were measured using X65 carbon steel at pH 4 in the presence and absence of CO 2 , including high CO 2 pressure experimental conditions. The results did not evidence a direct reaction of CO 2 on the free iron surface.