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08625 Electrochemical Evaluation of CO2 Corrosion Inhibitors in High Turbulence Multiphase Fluid Flow

Picture for 08625 Electrochemical Evaluation of CO2 Corrosion Inhibitors in High Turbulence Multiphase Fluid Flo
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Product Number: 51300-08625-SG
ISBN: 08625 2008 CP
Author: Qingjiang Meng and Vladimir Jovancicevic
Publication Date: 2008
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Inhibition effectiveness of two CO2 corrosion inhibitors was evaluated at 93 °C (200 °F) and 0.55 MPa (80 psi) CO2 partial pressure under high turbulence multiphase fluid flow condition using the jet impingement technique. Electrochemical methods including linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) were employed to determine the general corrosion rate and obtain mechanistic information about flow induced pitting corrosion and film capacitance in the corrosion tests. The occurrence of pitting resulted in two time constants found in the EIS data compared to only one time constant found for the pit-free surface. The results demonstrate that high shear stress corrosion inhibitors not only offer general corrosion inhibition but also prevent carbon steels from pitting under aggressive multiphase flow conditions.
Inhibition effectiveness of two CO2 corrosion inhibitors was evaluated at 93 °C (200 °F) and 0.55 MPa (80 psi) CO2 partial pressure under high turbulence multiphase fluid flow condition using the jet impingement technique. Electrochemical methods including linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) were employed to determine the general corrosion rate and obtain mechanistic information about flow induced pitting corrosion and film capacitance in the corrosion tests. The occurrence of pitting resulted in two time constants found in the EIS data compared to only one time constant found for the pit-free surface. The results demonstrate that high shear stress corrosion inhibitors not only offer general corrosion inhibition but also prevent carbon steels from pitting under aggressive multiphase flow conditions.
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