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Investigation on the Functionally Graded Properties of Zn–6MgO–12MnO2 Composite Coating Fabricated by Dual Anode Electrolytic Deposition Technique

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Abstract

The effect of MnO2 particulates on Zn–MgO composite prepared via electrocodeposition route on low carbon steel was investigated. The experiment was conducted at constant current density of 11.2 A cm−2. The microstructural properties of the coated surfaces were characterized using high-resolution Nikon Optical Microscope (OPM) and scanning electron microscopy attached with energy-dispersive spectrometer (SEM/EDX). The corrosion behaviour was examined using linear polarization method in 3.5% NaCl-simulated seawater environment. The micro-hardness features of the electrodeposits were analyzed by dura scan hardness tester. The homogenizing and thermal stability of the fabricated composite was determined at 200 °C for 4 h. The results show that the structural performance and corrosion resistance property of the coating is dependent on the dispersion strengthening of the particle incorporation. The micro-hardness of the deposited samples increased with the increased addition of MnO2 with over 90%. The improvement in the micro-hardness of the deposited samples suggests that MnO2 has a strengthening effect on the mild steel.

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Acknowledgements

The authors acknowledge the support from Surface Engineering Research Centre (SERC), Tshwane University of Technology, and Pretoria, South Africa.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Covenant University, P.M.B 1023, Ota, Nigeria

    O. S. I. Fayomi, O. Patrick & O. R. Olatunji

  2. Department of Materials Science and Engineering, Obafemi Awolowo University, Ile-Ife, Osun, Nigeria

    A. A. Daniyan

  3. Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, P.M.B. X680, Pretoria, South Africa

    O. S. I. Fayomi & A. P. I. Popoola

Authors
  1. O. S. I. Fayomi
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  2. A. A. Daniyan
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  3. A. P. I. Popoola
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  5. O. R. Olatunji
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Correspondence to O. S. I. Fayomi.

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Fayomi, O.S.I., Daniyan, A.A., Popoola, A.P.I. et al. Investigation on the Functionally Graded Properties of Zn–6MgO–12MnO2 Composite Coating Fabricated by Dual Anode Electrolytic Deposition Technique. J Bio Tribo Corros 5, 102 (2019). https://doi.org/10.1007/s40735-019-0295-8

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  • DOI: https://doi.org/10.1007/s40735-019-0295-8

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