Experimental and Numerical Study of CO2 Corrosion in Carbon Steel

Abstract

This research involves study corrosion of low carbon steel under static and flowconditions at 200L/h in the absence and presence of CO2 at two rates 9 and 30 ml/minat four temperatures by electrochemical method using potentiostat. Numerical modelwas achieved to compare between the experimental and theoretical results to estimatecorrosion rate. The results show that the presence of CO2 under static conditionsshifts the Ecorr toward noble direction, while under flow condition the presence of CO2shift Ecorr toward active or noble direction at two rates of gas. The data of corrosionrate in mm/y indicate that the presence of CO2 with two flow rate increased the ratecompared with the case of absence of CO2 under static conditions except one case,while under flow conditions, the presence of 9 ml/min. CO2 increases the corrosionrate, while the presence of 30 ml/min. CO2 decreases the rate because of formationFeCO3 scale except at 298K. A Mathematical model was done which show thevolumetric flow rate of CO2 and finally the corrosion rate of CO2 correlated withdimensionless groups and independent parameters.