High-temperature thermal treatment of co-deposition of Zn-10ZnO-25Ant hill particulate composite coating on mild steel
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Zinc coating is usually restricted to the operating temperature of not more than 250 °C. In order to increase the operating temperature of zinc coating that motivates the presence study, a composite coating of Zn-10ZnO-25Ant hill on mild steel surface was produced by a co-deposition route. Thermal treatment was done at temperature of 500, 700 and 900 °C. The microstructure, hardness values, corrosion and wear test were determined. The presence of hard phases of ZnSiO3, Al2O3·SiO3 and SiO2 were obtained in the coated sample. Fine, uniform distributed structure of coated sample was obtained at 700 °C. The increases in the hardness values of the coated samples were attributed to the hard phases of ZnSiO3, Al2O3·SiO3 and SiO2 formed. Zn-10ZnO-25Ant hill + 700 °C have the higher potential and lower corrosion rate of all the samples. Corrosion rates of 4.268 and 0.933 mpy were obtained for the uncoated mild steel and coated mild steel at 700 °C. The work has established that thermal stability of Zn-10ZnO-25Ant hill + 700 °C was in improving the properties of the developed coating.
KeywordsAnt hill Microstructure Corrosion Thermal treatment Wear
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The equipment support by the Nigeria Liquefied Gas (NLNG) Department of Metallurgical and Materials Engineering Laboratory University of Nigeria Nsukka, Nigeria is deeply appreciated.
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Conflict of interest
The authors declare that they have no conflict of interest.
- 1.Blejan, D.&Muresan, L. M.. Corrosion behaviour of Zn–Ni–Al2O3 nanocomposite coatings obtained by electrodeposition from alkaline electrolytes. Materials and Corrosion, vol. 63(2012), pg. 9999Google Scholar
- 3.Tuaweri TJ, Jombo PP, Okpala AN (2014) Corrosion resistance characteristics Of Zn-Ni/SiO2 composite coatings. International Journal of Advances in Materials Science and Engineering (IJAMSE) 3(2):678Google Scholar
- 5.Punith Kumar MK, Venkatesha TV (2015) Fabrication of zinc-nano TiO2 composite films: electrochemical corrosion studies. J Chem Pharm Res 5(5):253–261Google Scholar
- 7.Ghaziof S, Gao W (2015) Mechanical and chemical properties of Zn-Ni-Al2O3 nanocomposite coatings. Int J Chem, Mol, Nucl, Mater Metall Eng 9(8):945–949Google Scholar
- 9.Vaishaka R, Rao A, Hegde C, Udaya Bhat K (2013) Effect of heat treatment on structure and properties of multilayer Zn-Ni alloy coatings. J. Electrochem Sci Eng 3(4):137–149Google Scholar
- 10.Hammami O, Dhouibi L (2012) Patrice Berc¸ ElMustafa Rezrazi and Ezzeddine Triki Study of Zn-Ni alloy coatings modified by nano-SiO2 particles incorporation. Int J Corrosion 4:145–156Google Scholar
- 11.Malatji N, Popoola API (2015) Electrodeposition of ternary Zn-Cr2O3-SiO2 nanocomposite coating on mild steel for extended applications. Int J Electrochem Sci 10:3988–4003Google Scholar
- 13.Hassan SB and Aigbodion (2014) Effect coal ash on some refractory properties of alumino-silicate (Kankara) clay for furnace lining, Egypt J Basic Appl Sci 1 0 7–1 1 4Google Scholar