Sawdust Essential Oil of Cedrus Atlantica as Eco-Friendly inhibitor against mild steel corrosion in 1M HCl solution

Abstract

The inhibition efficiency of wood sawdust essential oil of Cedrus Atlantica against mild steel corrosion in 1M HCl solution has been tested using electrochemical impedance spectroscopy (EIS) and Potentiodynamic polarization. Polarization measurements revealed cathodic-type inhibitor behavior. The inhibitory efficacy assessed by both polarization and (EIS) techniques was in typical agreement, with %IE values of 95.09 5% and 95.82 % at 250 ppm of oil essential. Based on the kinetic and thermodynamic properties K_ads and rG°_ads, it is concluded that WSCA oil adsorption occurs via a physisorption process and follows the Langmuir isotherm. In addition, the temperature effect was studied at (303–333 K), and the thermodynamic parameters (E_a, rH, rS) were determined and discussed to elaborate the corrosion mechanism. The corrosion inhibition effect was discovered to be temperature and inhibitor concentration dependent.