The Valorization of the Hammada Scoparia Extract as an Eco-friendly Corrosion Inhibitor for Carbon Steel Corrosion in 1 M HCl
The present work continues to focus on expanding the use of plant extracts to combat metal corrosion and reports on the inhibiting effect of Hammada Scoparia (HS) extract on the corrosion of carbon steel in 1 M hydrochloric acid. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and gravimetric methods were utilized to examine the metal corrosion behavior without and with inhibitor. Polarization studies show that the Hammada Scoparia (HS) extract acts as a mixed inhibitor in acidic electrolyte and its inhibitory effectiveness rise with Hammada Scoparia (HS) extract concentration reaches a maximum of
93% for 0.6 g/L. The obtained Nyquist plots showed depressed semicircles and their diameter enhanced with rising HS extract concentration. The inhibiting capacity of HS extract for carbon steel in hydrochloric acid at diverse temperatures (303-333 K) was reduced somewhat. The adsorption of the HS extract on carbon steel follows the Langmuir isotherm. SEM and EDX observations confirmed the existence of protective film on the metal surface. A good agreement was obtained between various used technical.
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