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The present work is focused on the characterization of new composite zinc electrodeposits containing several graphene oxides produced by different processing techniques, aiming to improve the corrosion resistance of steel substrates. The corrosion behavior of the zinc-graphene composite deposits obtained from an acidic electrolyte (pH = 5.6) at two current densities (20 mA/cm and 40 mA/cm) in the presence of several types of graphene oxides produced by graphite exfoliation was investigated. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods were used to characterize the corrosion behavior of the deposits. The obtained results for Zn/steel, and Zn-graphene/steel deposits were compared in the same experimental conditions. The incorporation of graphene oxide in zinc matrices enhanced the corrosion resistance of the resulting composite coatings when compared to pure zinc coating and the degree of enhancement depends on the graphene oxide nature and preparation mode. 0 200 400 600 80

revue roumaine de chimie

INFLUENCE OF GRAPHENE OXIDES PRODUCED BY DIFFERENT PROCESSING TECHNIQUES ON THE CORROSION RESISTANCE OF ELECTRODEPOSITED Zn-GRAPHENE COMPOSITE COATINGS