Summary
CO2 corrosion inhibitors are widely adopted in production and
processing facilities in the oil and gas industry. The challenge is that under
multiphase flow (liquid/sand) and high shear-stress conditions, successful
application of inhibitors can be difficult. Under such severe erosion-corrosion
conditions, the total material damage is identified as being associated with
electrochemical corrosion, solid particle erosion, and synergistic effects
between the two.
To investigate the possibility of using corrosion inhibitors to reduce
erosion-corrosion, this study has characterized the corrosion phenomena
occurring at the carbon steel-electrolyte interface under erosion-corrosion
conditions. AC impedance was used to provide mechanistic information of
corrosion with absence and presence of a commercial corrosion inhibitor in
erosion-corrosion conditions in a CO2-saturated brine. Experiments
were conducted using a rotating cylinder electrode cell containing sand at
different temperatures, rotational speeds and with various inhibitor
concentrations. Four commercial inhibitors have been investigated.
In this work, the potential for applying corrosion inhibitors for the
reduction of material loss in erosion–corrosion is assessed and the role of the
inhibitor in reducing corrosion, erosion, and interactive mass-loss mechanisms
is discussed.
© 2009. Society of Petroleum Engineers
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History
- Original manuscript received:
12 March 2008
- Meeting paper published:
27 May 2008
- Revised manuscript received:
6 October 2008
- Manuscript approved:
10 October 2008
- Published online:
5 March 2009
- Version of record:
5 March 2009
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