Synthesis and Characterization of Alkaline NiP/NiP-SiO2 Nanocomposite Coatings
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Abstract
The mild steel (MS) components have failed disastrously owing to their structural hindrances along with deformations created by corrosion and wear phenomenon. To trounce these shortcomings of MS material, Ni-P (Nickel-Phosphorus)/NiP-SiO2 (silicon dioxide, zirox technologies; amount 5 gpl, size range 20 to 50 nm) nanocomposite films (5 to 9 micrometer) are developed on AISI1040 grade MS samples by an alkaline electroless method. The developed NiP-SiO2 nanocomposite coatings are of yellowish colour and have coarser surface as compared to NiP coatings. Furthermore, SEM, EDAX and XRD techniques are exploited to analyse the surface morphology, elemental concerto and phases of well-developed nanocomposite coatings. The consequences of these studies revealed a blossoming inclusion of SiO2 nanoparticles into NiP matrix and further as-deposited NiP/NiP-SiO2 nanocoatings have mostly amorphous structures and while heated (400°C) coatings have crystalline structures. The microhardness study for the developed nanocomposite coatings substantiated that inclusion of SiO2 nanoparticles into alkaline electroless NiP bath enhances the microhardness of NiP coatings and also much better than conventional MS material.
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