Study Of The Performance Of Ruscus Aculeatus Leaves Alcoholic Extract As Corrosion Inhibitor For Carbon Steel In 1 M HCl Solution

The addition of corrosion inhibitors is one of the most widely used methods for the protection of metals and alloys from corrosion in various environments. Although synthetic organic compounds have been found to be highly effective in mitigating corrosion, they are often toxic, non-biodegradable, and rather expensive. Plant extracts are among the environmentally friendly alternatives to replace organic compounds as corrosion inhibitors. This study aims to investigate the corrosion inhibition efficiency of the Ruscus aculeatus leaves (RAL) alcoholic extract for carbon steel immersed in 1 M HCl solution, using weight loss and potentiodynamic polarization measurements. The optimum concentration of RAL alcoholic extract, i.e. 200 mg/L, gave a corrosion inhibition efficiency of 91.09% at 25 ºC. Potentiodynamic polarization measurements showed that the RAL alcoholic extract acts as a mixed-type inhibitor with a predominant influence on the anodic corrosion reaction. The corrosion inhibition efficiency of the RAL alcoholic extract decreased at an acceptable rate with increasing temperature in the 25–55 ºC range.