Electrochemical Assessment of Ammonium Benzoate as Corrosion Inhibitor of Mild Steel in 0.5M HCl Solution: Solanum Tuberosum Extract as Surfactant

In order to increase and extend the usage of mild steel in a range of applications, critical research needs are extremely interested in corrosion studies, including corrosion inhibitor performance. The goal of this study is to look at the corrosion-inhibiting capabilities of ammonium benzoate in a 0.5 M HCl solution for mild steel, with solanum tuberosum (potato) extract serving as a surfactant. Mild steel samples were cut into corrosion coupons and submerged in 0.5 M HCl media to investigate the inhibitory effects at room temperature for various concentrations of ammonium benzoate using polarisation and weight loss techniques. A scanning electron microscopy fitted with electron dispersion spectroscopy (SEM-EDS) was used to investigate the morphology of the corroded samples. The results obtained indicated that ammonium benzoate performed better when combined with solanum tuberosum (potato) extract as a surfactant that inhibits mild steel corrosion in 0.5 M HCl by lowering the rate of corrosion. As the concentration rises, ammonium benzoate becomes more effective. From the weight loss test and polarisation analysis, a maximum inhibition efficiency of 99.94% at the 1.0 M concentration of inhibitor was achieved. It was observed that the ammonium benzoate adsorption mechanism isotherm fit with the Langmuir absorption isotherm when it was adsorbed on mild steel. Furthermore, adding solanum tuberosum (potato) extract to the inhibitor significantly reduces the rate of mild steel corrosion in HCl solution. The SEM micrographs confirm the presence of an absorbed protective film layer on the mild steel surface.