Electrochemical Behavior of Tubular Steel Corrosion in Brine Containing High Contents of H2S and CO2

Hong Da Deng; Chun Fu Li; Xian Long Cao; Mei Yu Zhao

doi:10.4028/www.scientific.net/AMR.284-286.2131

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 284-286Electrochemical Behavior of Tubular Steel...

Electrochemical Behavior of Tubular Steel Corrosion in Brine Containing High Contents of H₂S and CO₂

Abstract:

There were little works about electrochemical corrosion behaviors that appeared in high H₂S and CO₂ containing environment. In this work, the electrochemical behaviors of tubular steel API-P110 in buffered acidic NaCl solutions saturated with high H₂S and CO₂ containing gases, were investigated by potentiodynamic sweep technique. Analysis of the results shows corrosion density declines with increasing CO₂ content in H₂S/CO₂. The corrosion potential of steel moves towards more negatively with the increase of CO₂ content in H₂S/CO₂. In pH 2.9 solution, Passivity appears in high H₂S and CO₂, but no passivity shows in due to decreasing in high H₂S. In pH 5.3 solution, cathodic liming density comes out and increases with the increasing CO₂ content in H₂S/CO₂, however, no cathodic liming density comes out in H₂S.

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Advanced Materials Research (Volumes 284-286)

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2131-2135

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.284-286.2131

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Online since:

July 2011

Authors:

Hong Da Deng, Chun Fu Li, Xian Long Cao, Mei Yu Zhao

Keywords:

Carbon Dioxide CO₂, Corrosion Behaviour, Hydrogen Sulfide, Tubular Steel

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