Browsing by Author "Oluwasegun, Kunle Michael"

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    Effect of ZrB2 Functionalized Nanoparticles Growth on Microstructural and Corrosion Resistance on Mild Steel through Electrodeposition Route
    (Key Engineering Materials, 2021) Fayomi, Ojo Sunday Issac; Nkiko, Mojisola O.; Dauda, Khadijah Tolulope; Oluwasegun, Kunle Michael
    In other to have a better performance of Ni-P-Zn multifunctional applications, crystallite-like Ni-P-Zn-ZrB2 composite was actively fabricated by electrodeposition principle. The corrosion, structural evolution and surface active phenomena were investigated by various techniques. The influence of ZrB2 particulate on the morphology and corrosion properties was examined. The outcomes show an inclusive flower-like doped ZrB2 phase constituent and is uniformly distributed Ni-P-Zn-ZrB2 improved strengthening effect. The corrosion progression of the developed metal alloy was compared with other coating matrix from 10-25 minutes interval. The integration of ZrB2 on Ni-P-Zn phase especially for 25 min deposits significantly enhances corrosion resistance due to good grain refinement. Keywords: Ni-based composite, electrodeposition, time difference, coating, corrosion
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    Experimental Investigation and Time Effect on the Anticorrosion and Microstructural Properties of Zinc Flake Nickel−Phosphorus Coating Electrodeposited on Mild Steel
    (ACS Publications, 2021-04-21) Fayomi, Ojo Sunday Isaac; Ayodeji, Sode Adedamola; Agboola, Oluranti; Oluwasegun, Kunle Michael; Nkiko, Mojisola O.
    In this work, the potential of ZnSO4·7H2O in NiP sulphate electrolyte deposited on mild steel under constant optimum pH of 5, current density of 1 A/cm2, stirring rate of 200 rpm, and varying time parameter between 10, 15, 20, and 25 min were studied using the electrodeposition method. The microstructure properties and corrosion resistance characteristics were analyzed using a scanning electron microscope enhanced with an energy-dispersive spectroscope and potentiodynamic polarization apparatus, respectively. The codeposited was subjected to different media test rig of 0.5 M H2SO4 and 3.5% NaCl to examine the susceptibility effect. The results pointed out that there is a stable mass weight gain as the time increases, which facilitates the formation of dispersed crystal build-up and homogeneous NiPZn content within the interface. A remarkable corrosion property was also noticed with deposits of highest time effect, which is invariably a factor of solid bonding seen at the surface lattice.