Herein, the effect of deposition voltage on the chemical composition, corrosion resistance, structureand surface properties of Zn-Fe-Co coatings was explored using potentiostatic measurements, cyclicvoltammetry, linear sweep voltammetry, anodic linear polarization, atomic absorption spectroscopy,scanning electron microscope, and X- ray diffraction. The results indicated that the corrosionresistance is directly related to Co and Fe contents in Zn-Fe-Co deposits. A significant increase in thequantities, contents and efficiency of zinc was achieved by increasing the deposition voltage which ledto a sharp decrease the polarization resistance of the coated alloys. This is due to the ease ofdissolution of zinc compared to Co and Fe. Moreover, Zn-Fe-Co coatings with a high content of cobaltup to 37% possess superior corrosion resistance compared to the pure Zn coatings and Zn-Fe-Cocoatings with low values of cobalt contents less than 6%. A mechanism for electrodeposition modelhas been proposed and discussed.
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