An eco-friendly corrosion inhibitor for steel used in desalination systems during acid cleaning: Irish ivy extract.

Examining Irish ivy extract's (IIE) potential as a novel corrosion inhibitor to preserve C-steel in 2.0 M HSO solution under dynamic conditions is the main goal of this work. Investigations on weight loss, surface morphology, thermodynamics, electrochemistry (polarization and impedance), and adsorption isotherms all contributed to the achievement of this goal. The results demonstrated that the IIE extract's inhibitory effectiveness increases with concentration, reaching a maximum of 94.2% at 0.5 g L. The approach that most nearly matched the experiment's results was the Langmuir adsorption isotherm. The activation energy rises to 61.4 kJ mol when IIE extract is added, compared to 46.9 kJ mol (2.0 M HSO). The mixed type behavior of the IIE extract was confirmed by electrochemical method. The IIE extract effectively adsorbed on the C-steel, as confirmed by the FT-IR and SEM examinations. Many compounds, including α-hederin, hederacoside C, hederacoside D, and chlorogenic acid, which may operate as the main agents of corrosion control, were found by HPLC analysis of the IIE extract.