Structural Characterization and Corrosion Properties of Electroless Processed Ni–P–MnO2 Composite Coatings on SAE 1015 Steel for Advanced Application

Fayomi, O. S. I and AKANDE, I.G and Popoola, A. P. I. and Popoola, Segun I. (2019) Structural Characterization and Corrosion Properties of Electroless Processed Ni–P–MnO2 Composite Coatings on SAE 1015 Steel for Advanced Application. Journal of Science: Advanced Materials and Devices.

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Abstract

In recent year electroless Ni–P coatings with the incorporation of metallic oxides have received profound interest due to their unique properties and ability to enhance the operational performance of the based metal. These coatings have been utilised for numerous applications such as aerospace, automotive and industrial field where materials with exceptional qualities are required. This present work focused on the improvement of the surface characteristics of mild steel via the electroless deposition of Ni-P-MnO2. The deposition was achieved varying the mass concentration of MnO2 at a constant temperature and deposition time of 85 oC and 20 minutes respectively. The examinations of the coated surfaces using Scanning Electron Microscope revealed that the surface morphology of the coated steel improved as the mass concentration of MnO2 increases. Linear potentiodynamic polarization experiment unveiled that Ni-P-MnO2 coating exhibits good corrosion resistance, protecting the steel from the penetration of corrosive ions in the test medium. Moreso, the investigation of the microhardness behaviour of the coated samples using the Vickers hardness tester shows that Ni-P-MnO2 coating enhanced the microhardness of the steel substrate

Item Type:	Article
Uncontrolled Keywords:	Electroless; Coating; Morphology; Corrosion and Hardness.
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Hannah Akinwumi
Date Deposited:	23 Apr 2019 10:56
Last Modified:	23 Apr 2019 10:56
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/12616

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