Date Seed Extract as Green Corrosion Inhibitor for Steel in Hydrochloric Medium

Abstract

The date seed extract is considered an effective and environmentally friendly corrosion inhibitor. In this study,the ability to inhibit corrosion of steel in an acidic medium was tested by measuring weight loss, potentiodynamic polarisation, scanning electron microscope techniques, and Fourier Transform infrared spectroscopy. Depending on weight loss, it was observed that inhibition efficiency increased with inhibitor concentration, while the corrosion rate decreased. The maximum inhibition efficiency was 93% for 0.6g/L in0.5M HCl. The results from the polarization curves showed that the extract behaved as a mixed-type corrosioninhibitor, and the maximum inhibition efficiency was 99% for 0.4 and 0.6g/L in 0.5M HCl. The molecule inhibitor adsorption isotherm plots showed that the adsorption of the extract follows the Langmuir isotherm. Scanning electron microscope techniques emphasized the prevent corrosion of the metal surface due to the adsorption of inhibitor molecules on its surface.