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Effect of carbon dioxide on corrosion of tubular steel in high hydrogen sulfide and carbon dioxide environments

Effect of carbon dioxide on corrosion of tubular steel in high hydrogen sulfide and carbon... Purpose – The present work primarily aims to study the corrosion characterization of tubular steel API‐P110 in high H 2 S containing solution with or without CO 2 . Design/methodology/approach – Corrosion behaviors of steel in buffered solutions containing 50 percent H 2 S and various levels of CO 2 concentration were investigated via weight‐loss method, SEM and EDS. The effects of CO 2 on corrosion occurred on the metal were analyzed by electrochemical techniques. Findings – Corrosion rates of steel decreased as the CO 2 content in H 2 S/CO 2 solution increased. It was observed for the tubular steel to experience an increase in corrosion rate at concentrations 17 percent CO 2 or 34 percent CO 2 in 50 percent H 2 S while when further increasing concentration of CO 2 to 50 percent the corrosion rate decreases. Increased CO 2 content in H 2 S/CO 2 led to fewer anions desorbing and fewer reactants adsorbing, e.g. H+, H 2 CO 3 . As a result, cathodic reaction rate decreased and the amount of hydrogen absorbed decreased. Originality/value – The experimental results showed that corrosion alleviated when increasing CO 2 content in high H 2 S and CO 2 containing environment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

Effect of carbon dioxide on corrosion of tubular steel in high hydrogen sulfide and carbon dioxide environments

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References (30)

Publisher
Emerald Publishing
Copyright
Copyright © 2011 Emerald Group Publishing Limited. All rights reserved.
ISSN
0003-5599
DOI
10.1108/00035591111148911
Publisher site
See Article on Publisher Site

Abstract

Purpose – The present work primarily aims to study the corrosion characterization of tubular steel API‐P110 in high H 2 S containing solution with or without CO 2 . Design/methodology/approach – Corrosion behaviors of steel in buffered solutions containing 50 percent H 2 S and various levels of CO 2 concentration were investigated via weight‐loss method, SEM and EDS. The effects of CO 2 on corrosion occurred on the metal were analyzed by electrochemical techniques. Findings – Corrosion rates of steel decreased as the CO 2 content in H 2 S/CO 2 solution increased. It was observed for the tubular steel to experience an increase in corrosion rate at concentrations 17 percent CO 2 or 34 percent CO 2 in 50 percent H 2 S while when further increasing concentration of CO 2 to 50 percent the corrosion rate decreases. Increased CO 2 content in H 2 S/CO 2 led to fewer anions desorbing and fewer reactants adsorbing, e.g. H+, H 2 CO 3 . As a result, cathodic reaction rate decreased and the amount of hydrogen absorbed decreased. Originality/value – The experimental results showed that corrosion alleviated when increasing CO 2 content in high H 2 S and CO 2 containing environment.

Journal

Anti-Corrosion Methods and Materials – Emerald Publishing

Published: Jun 28, 2011

Keywords: Corrosion; Electrochemical; Materials; Mechanisms; Microscope; Oil and gas; Steel

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