TY - JOUR
T1 - Aerated corrosion behavior of API-X100 pipelies steel at high temperature - Electrochemical ivestigation
AU - Eliyan, Faysal Fayez M.
AU - Alfantazi, Akram M.
N1 - Funding Information:
The authors would like to thank Qatar National Research Fund (QNRF) and National Science and Engineering Research Council (NSERC) for providing the financial support for this published work.
Publisher Copyright:
Copyright 2011, Brazilian Petroleum, Gas and Biofuels Institute - IBP
PY - 2011
Y1 - 2011
N2 - The aim of this experimental work is to provide an insight to the main electrochemical perspectives related to carbon dioxide corrosion behavior of API-X100 pipeline steel at high temperatures. The corrosion performance is investigated in laboratory conditions simulating the extensive dissolution of carbon dioxide in water cuts at the early stages of transmission where considerable amounts of oxygen is entrapped. Open Circuit Potentials (OCP), potentiodynamic polarization, as well as Electrochemical Impedance Spectroscopy are all utilized in the electrochemical analysis. The tests are performed in 0.05, 0.1, 0.5, and 1 mol/L bicarbonate solutions containing 3 wt% NaCl at 40, 60, and 80oC in conditions facilitating good oxygen diffusivity. OCP values were mainly influenced by the cathodic reduction of oxygen and water and got nobler with increased bicarbonate content. Additionally, corrosion rates increased generally with temperature showing sole anodic peaks before the extensive dissolution. The equivalent circuits proposed for the electrochemical systems encountered achieved very good agreement with the experimental results as well as with the polarization characteristics.
AB - The aim of this experimental work is to provide an insight to the main electrochemical perspectives related to carbon dioxide corrosion behavior of API-X100 pipeline steel at high temperatures. The corrosion performance is investigated in laboratory conditions simulating the extensive dissolution of carbon dioxide in water cuts at the early stages of transmission where considerable amounts of oxygen is entrapped. Open Circuit Potentials (OCP), potentiodynamic polarization, as well as Electrochemical Impedance Spectroscopy are all utilized in the electrochemical analysis. The tests are performed in 0.05, 0.1, 0.5, and 1 mol/L bicarbonate solutions containing 3 wt% NaCl at 40, 60, and 80oC in conditions facilitating good oxygen diffusivity. OCP values were mainly influenced by the cathodic reduction of oxygen and water and got nobler with increased bicarbonate content. Additionally, corrosion rates increased generally with temperature showing sole anodic peaks before the extensive dissolution. The equivalent circuits proposed for the electrochemical systems encountered achieved very good agreement with the experimental results as well as with the polarization characteristics.
UR - http://www.scopus.com/inward/record.url?scp=85044713717&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85044713717
SN - 2447-2069
VL - 2011-September
JO - Rio Pipeline Conference and Exposition, Technical Papers
JF - Rio Pipeline Conference and Exposition, Technical Papers
T2 - 2011 Rio Pipeline Conference and Exposition
Y2 - 20 September 2011 through 22 September 2011
ER -
