Title: Effect of current density and ZnO nano particles influence on the microstructure and mechanical strengthening properties of Zn-TiO₂-ZnO alloys at constant deposition time

Authors: A.A. Daniyan; O.S.I. Fayomi; L.E. Umoru; A.P.I. Popoola

Addresses: Department of Materials Science and Engineering, Obafemi Awolowo University Ile-Ife, Nigeria ' Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, P.M.B. X680, Pretoria, South Africa; Department of Mechanical Engineering, Covenant University, P.M.B. 1023, Ota, Nigeria ' Department of Materials Science and Engineering, Obafemi Awolowo University Ile-Ife, Nigeria ' Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, P.M.B. X680, Pretoria, South Africa

Abstract: In this work, the effect of current density and particle loading on microstructure and mechanical properties of Zn-TiO₂-ZnO nanocomposite produced via electrocodeposition are investigated. The morphological characteristics of the nano-composite coatings were characterised by scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS). Mechanical examination was carried out using Dura scan micro-hardness tester and CERT UMT-2 multi-functional tribological tester. The corrosion properties were evaluated using linear polarisation technique in 3.5% NaCl. The result showed that the coatings exhibited good stability and the quantitative particle loading significantly improved the micro-structural properties of the coating. It is also noticed that the hardness performance and corrosion resistance of the coatings were significantly impacted with over 70% improvement as against the as-received samples.

Keywords: Zn-TiO₂-ZnO; nanocomposite; electrocodeposition; coatings; corrosion resistance.

DOI: 10.1504/IJMATEI.2018.092186

International Journal of Materials Engineering Innovation, 2018 Vol.9 No.1, pp.34 - 45

Received: 13 Nov 2017
Accepted: 29 Dec 2017
Published online: 08 Jun 2018 *

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