Experimental and Surface Evaluation of Zinc Electroplating Efficiency and Corrosion Inhibition Effects of Centaurea napifolia Extracts

• DOI: 10.18321/ectj1655
• Publication Date: 2025-04-21T12:37:26Z
• Authors: Habiba Soltani; Karima Hanini; Merzoug Benahmed; Sameh Boudiba; Alfred Ngenge Tamfu; Amar Zellagu; Salah Akkal
• Keywords: Centaurea

This study introduces Centaurea napifolia as a novel multifunctional corrosion inhibitor and zinc-electroplating additive previously unexplored in the field. Hydro-methanolic, methylene dichloride, ethyl acetate, n-butanol extracts were investigated for their dual functionality: inhibiting of carbon steel improving performance zinc electrodeposition on mild steel. Using techniques such potentiodynamic polarization, gravimetric methods, electrochemical impedance spectroscopy, scanning electron microscopy/energy dispersive profilometry, significant improvements brightness, resistance, coating quality, adhesiveness have been found. Notably, adding 3.2 g/l butanolic extract achieved an optimal rate 0.038 mm/y, substantial improvement over unplated plated samples without additives, reduced current density from 0.3235 mA/cm² to low 0.0033 mA/cm². These showed effective inhibition against acidic environments with efficiencies up 82%, following Langmuir isotherm model physical adsorption being spontaneous exothermic, highlighting potential eco-friendly alternatives metal protection. findings translate economic opportunities industries reliant protection systems by offering that could reduce environmental impact while enhancing durability components used practical or industrial applications.