L-arginine as corrosion and scale inhibitor of steel in synthetic reservoir water

Abstract

Effect of L-arginine as corrosion and calcium carbonate scale inhibitor has been evaluated using scale inhibition efficiency experiments, electrochemical measurements (Electrochemical impedance spectroscopy, EIS, potentiodynamic polarization and linear polarization measurements) and Monte Carlo simulation measurements. The evaluation shows that L- Arginine may be considered as a multifunctional inhibitor. Scale inhibition efficiency experiments as well as electrochemical experiments confirm that the scale /inhibition action of L-arginine in synthetic reservoir water. Results of electrochemical experiments shows that, under the selected experimental conditions L-arginine presents sufficient inhibition for steel corrosion in synthetic reservoir water. Monte Carlo simulation used to find low energy adsorption sites found on L-arginine as well as Fe (111) surface as the temperature of the system is slowly decreased. The results indicated that L-arginine could relaxe on a iron surface by adsorption through the nitrogen/oxygen atoms with the lone pair of electrons in its molecule.