Quaternary Zn-Ni-MoO2-NbO2 intermetallic composite deposits on mild steel via electrodeposition route.
Monyai, T. Fayomi, O.S.I. Popoola, A.P.I.
Monyai, T.
Fayomi, O.S.I.
Popoola, A.P.I.
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Abstract
In majority of industrial applications zinc electrodeposition has been widely used for the corrosion resistant coating on steel due to its unique properties, low cost and sacrificial nature. Steel remains the most widely used material in most applications due to its excellent properties but its faults cannot be over emphasis in term of deterioration. A thin film of Zn on steel substrates was prepared by electrodeposition technique using incorporated rare earth metallic composites to form an optimised bath plating solution. Quaternary Zn-Ni-MoO2- NbO2 alloy coatings, as a potential replacement for Zn-Ni coatings were deposited from an acid sulphate solution. The mechanical wear and corrosion behaviours of Zn-Ni-MoO2-NbO2 Coated Mild Steel in 3.65% NaCl are described; these were studied by means of MTR-300 dry abrasive wear and polarization measurements respectively. The crystal particles present were observed by X-ray diffraction pattern (XRD) and energy dispersive X-ray diffraction spectrometer (EDS). The microhardness of deposited plate were investigated by means of Vickers microhardness. Scanning electron microscope and was used to study the surface morphology, and synergistic influence content in bath on surface morphology revealed that morphological changes observed in presence of additives exhibits synergistic influence on improving corrosion resistance and hardness of the deposit.
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Date
2018-01-01
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Publisher
IOP Publishing
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Keywords
Inter-metallic, Tafel plot, Micrographs, Zn-Ni-MoO2-NbO2