Abstract
The effect of pre-corrosion of carbon steel on the performance of a commercial amine based fatty acid corrosion inhibitor, KI384, was investigated in formation water solutions saturated with CO₂ using electrochemical impedance spectroscopy (EIS) measurements. The investigation was performed at constant partial pressure of CO₂ using an autoclave system with Rotating Cylinder Electrodes (RCE). Carbon steel was pre-corroded for periods up to 7 days at 35 and 80 °C in the test solution prior to inhibitor injection. The results showed that when KI384 was applied on non-corroded carbon steel specimen, high inhibitor performance (99.8 %) was achieved independent of temperature. When KI384 was applied on pre-corroded carbon steel, inhibitor performance was found to be very much dependent on temperature and pre-corrosion time. It was evident from the results that the nature of the corrosion products formed during the pre-corrosion of carbon steel has a significant influence on the inhibitor efficiency, especially at 80 °C.
Recommended Citation
Buchweishaija, J. (2002). Evaluation of Corrosion Inhibitor on Pre-Corroded Carbon Steel in Co2 Medium by Impedance Spectroscopy. Tanzania Journal of Engineering and Technology (TJET), 25(1), 37-46. https://doi.org/https://doi.org/10.52339/tjet.v25i1.314
Publisher Name
University of Dar es Salaam