Anti-Corrosive Behaviour of Saccharum officinarum Extract in 15% HCl for Stainless Steel-410 Surface

Abstract

The objective of this study is to experimentally evaluate the inhibition properties of Saccharum officinarum extract in a 15% hydrochloric acidic media for stainless steel (SS-410). The gravimetric, UV spectroscopy, FTIR and surface morphological studies carried out using SEM, AFM and XRD revealed that the S. officinarum extract protected the SS 410 steel in 15% hydrochloric acidic medium. Gravimetric analysis revealed maximum 95.92 % inhibition efficiency at 4 g/L inhibitor concentration. The computational studies (quantum chemical calculations) were further utilized to understand the concept of chelation mechanism. The surface film formation and other 3D features of S. officinarum extract film over SS-410 surface was confirmed using AFM studies. Adsorption of S. officinarum extract over SS-410 surface followed Langmuir adsorption isotherm. It is clear from the theoretical and computational studies that the S. officinarum extract acted as mixed type inhibitor by adsorption of hybrid organic-inorganic inhibitor ingredients on SS-410. Thus, S. officinarum extract can develop an efficient protective layer on SS-410 that has various industrial applications.