An electrochemical investigation on the effect of the chloride content on CO₂ corrosion of API-X100 steel

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• 作者：Faysal Fayez Eliyan ; Farzad Mohammadi ; Akram Alfantazi
• 关键词：A. API-X100 ; A. CO2 ; A. Oil ; B. Polarization ; B. EIS ; A. Chloride
• 刊名：Corrosion Science
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：64
• 期：Complete
• 页码：37-43
• 全文大小：1268 K

文摘

This research argues that the corrosion rate for high strength steel in CO₂-saturated solutions reaches a maximum at a threshold chloride content. At 20 ¡ãC, the corrosion rates increased from 60 ¦ÌA/cm² in 5 g/L solutions to a maximum of 185 ¦ÌA/cm² in 15 g/L solutions, and then became less in the more concentrated solutions. The anodic dissolution accelerated at 90 ¡ãC and the cathodic reactions decelerated with adding 10 vol. % oil where the chloride content effect remained relatively the same. Some EIS experiments demonstrated an agreement with the polarization results without confirming that threshold effect of chloride on charge transfer.