Facultad de Ciencias Básicas

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“Enfoque verde para la inhibición de la corrosión por extracto de pimienta en nacl 3.5% p/v”.
(Universidad Santiago de Cali, 2020) Ospina Lozano, Saray; Morales Morales, Jimmy Alexander; Castillo Ayala, Jorge Enrique
This study presents a corrosion inhibition analysis of pepper oil (Piper nigrum) on carbon steel in 3.5% NaCl solution. Corrosion inhibition efficiency was studied using electrochemical impedance spectroscopy and polarization curves. The results from the polarization curves show that the efficiency of the inhibitor was 95% with a concentration of 200ppm at 27ºC the reductions in the corrosion current being about one order significant. of magnitude. The results of the EIS and analysis of chemical reactivity descriptors, showed that the unsaturation present in the molecular structure of the components of the black pepper extract, or some synergistic effects between different molecules, contributed to its efficiency as an inhibitor, adsorbing on the surface of the metal and blocking the corrosion process.