Evaluation of Curam drug as an ecofriendly corrosion inhibitor for protection of stainless steel‐304 in hydrochloric acid solution: Chemical, electrochemical, and surface morphology studies

Abstract

AbstractIn the present work, the Curam drug was used as an eco‐friendly corrosion inhibitor for the protection of stainless steel 304 (SS‐304) in 2.0 M HCl solution. The inhibition efficiency was determined by mass loss (ML), Potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) measurements. The surface morphology analysis carried out using Fourier transform infrared spectroscopy (FT‐IR) and atomic force microscopy (AFM). ML data prove that with an increase in the temperature, Curam still exhibits good anti‐corrosion performance. The inhibition efficiency of Curam can still be maintained at about 72% at 318 K. The data of electrochemical measurements indicate that Curam is the mixed‐type inhibitor. The adsorption process of Curam on the SS‐304 surface obeys the Langmuir adsorption isotherm. FT‐IR and AFM analysis showed the excellent inhibition performance of Curam for SS‐304 dissolution in an acidic medium. The data obtained by chemical and electrochemical measurements are in good agreement with one another.