Potential application of Ginkgo biloba extract as a green corrosion inhibitor for carbon steel reinforcement in chloride-polluted simulated concrete pore solution

Abstract

The present work describes the development of a green and sustainable corrosion inhibitor using the extract of Ginkgo biloba fruit (GBFE). The screening of the inhibitory performance of GBFE was done in a simulated concrete pore solution (SCPS). The results report that GBFE inhibits B450 ribbed steel bar (RSB) corrosion and represents a significant decrease in corrosion rate with the rising dose at 50 °C temperature. Electrochemical experiments manifest that GBFE can restrain reactions of the cathode and anode of RSB. The molecular adsorption of GBFE is governed by Langmuir adsorption isotherm. The main active components were classified using Fourier Transform Infrared Spectrometer (FTIR) and Mass spectrometry (MS). The morphology maps of surface analysis support the creation of an inhibitive layer of GBFE over the RSB surface. DFT and MC describe the adsorption of GBFE over the RSB.