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Anti-corrosion properties and structural characteristics of fabricated ternary coatings

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Abstract

In this paper deposition of zinc (Zn)-cobalt (Co) particles and the titanium IV oxide composite (TiO2) by electrodeposition in a single electrolyte bath was studied. Zinc coatings modified with cobalt and titanium IV oxide incorporation were produced using optimized process parameters. Morphological and microstructural properties of the fabricated coatings were characterized by an X-ray diffractometer (XRD) and a scanning electron microscope equipped with energy dispersive spectrometer (SEM/EDS). Mechanical characteristics of the coatings were evaluated by a high impact diamond-based Dura Scan micro hardness tester. The corrosion resistance properties were determined with the VA 669 PG STAT 101 using the linear potentiodynamic polarization method. As a result, it was found that the deposition of admixed Zn-Co submicron sized TiO2 composite particles was successful. A better interfacial interaction was found to exist between the based particulate and the composite. Structural comparison of the deposited coatings with SEM, optical microscope and atomic force microscope images revealed that the homogenous grain structure was formed. Corrosion resistance increased significantly and, in addition, a better micromechanical behavior of the coatings wasattained by changing the parameters and content of Co and TiO2 particulates.

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Authors and Affiliations

  1. 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

  2. Department of Mechanical Engineering, Covenant University, P.M.B 1034, Ota, Ogun State, Nigeria

    O. S. I. Fayomi

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  1. O. S. I. Fayomi
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  2. A. P. I. Popoola
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Correspondence to O. S. I. Fayomi.

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Fayomi, O.S.I., Popoola, A.P.I. Anti-corrosion properties and structural characteristics of fabricated ternary coatings. Surf. Engin. Appl.Electrochem. 51, 76–84 (2015). https://doi.org/10.3103/S1068375515010068

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  • DOI: https://doi.org/10.3103/S1068375515010068

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