Application of Zizyphus Lotuse - pulp of Jujube extract as green and promising corrosion inhibitor for copper in acidic medium.

Abstract The study of the inhibitory power of the Pulp of Jujube (PJ) extract of the plant Zizyphus Lotus with respect to the corrosion of copper in 1 M hydrochloric medium has been realized. This study was conducted by stationary and transients electrochemical measurements, weight loss and atomic absorption spectroscopy techniques. Scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), Fourier transform infrared (FT-IR) and atomic force microscopy (AFM) studies were used to characterize the surface of uninhibited and inhibited copper specimens. The results showed that the inhibition increases with PJ extract concentration reaching a maximum of 93% at a concentration of 1 g L−1. The obtained results indicate that PJ extract can act as a good green corrosion inhibitor for copper in 1 M HCl. The effect of temperature was also investigated and thermodynamic parameters were determined and discussed. Graphical abstract Unlabelled Image Highlights • The PJ extract is highly efficient corrosion inhibitor. • The inhibitory efficiency reaches a value of 93% at 1 g L−1. • Polarization studies revealed that PJ acts as a cathodic type. • The temperature effect revealed that the mode of adsorption is a physical nature. • The inhibition mechanism is studied using SEM/EDS, AFM and FT-IR surface analysis. [ABSTRACT FROM AUTHOR]