Browsing by Author "Yathish Rai, T."

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    Electrochemical development and characterisation of nanostructured Ni–Fe alloy coatings for corrosion protection
    (Taylor and Francis Ltd., 2025) Yathish Rai, T.; Hegde, A.C.
    Nanostructured Ni–Fe alloy coatings were developed galvanostatically using a new low-concentration bath. The composition and operating parameters of the bath were optimised by taking the benefit of the conventional Hull cell method. Ni–Fe alloy coatings were developed at different current densities (2.0 to 5.0 A dm?2), keeping pH = 2.5. The corrosion behaviour of electrodeposited alloy coatings was evaluated in 3.5% NaCl solution, using Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarisation methods. Ni–Fe alloy coating, deposited at 2.0 A dm?2 exhibited a lesser corrosion rate (14.71 × 10?2 mm y?1) than those at higher current densities. The lowest corrosion rate was attributed to its least crystallite size (10.4 nm), evidenced by an X-Ray Diffraction (XRD) study. The corrosion performance of Ni–Fe alloy coatings was discussed in the light of their surface morphology and composition, evidenced by SEM and Energy-Dispersive X-ray spectroscopy (EDS) analysis, respectively. © 2024 Canadian Institute of Mining, Metallurgy and Petroleum.
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    Electrodeposition and Electrocatalytic Study of Ni–Co Alloy Coatings
    (Pleiades Publishing, 2024) Yathish Rai, T.; Hegde, A.C.
    Abstract: The present work focusses on the fabrication of new Ni–Co electrolyte for the development of Ni–Co electrocatalysts for water splitting application. All the Ni–Co alloy coatings were deposited from an acid sulphate bath and their electrocatalytic activity was tested in 1 M KOH. The Ni–Co alloys developed at range of current density from 3.0 to 6.0 A dm–2 were found to be good electrode materials for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as demonstrated by cyclic voltammetry (CV) and chronopotentiometry (CP) methods. The Ni–Co alloy deposits which are catalytically active for HER are found to be inactive for OER and vice versa. The change in surface appearance, composition, and the phase structure of all developed coatings were analysed using instrumental techniques like scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD), respectively. © Pleiades Publishing, Ltd. 2024.
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    Magnetic field-induced codeposition of (Ni–Co) alloy coatings for better corrosion protection
    (SAGE Publications Ltd, 2025) Yathish Rai, T.; Hegde, A.
    This paper explores the benefit of induced magnetic field (B) in the co-deposition of (Ni–Co) alloy coatings for better corrosion protection. The phenomenon of magnetohydrodynamic (MHD) convection has been used as the tool to deposit (Ni–Co) alloy coatings of high corrosion protection from an electrolytic bath having low [Co+2] ions. Experimental studies demonstrated that under optimal conditions of magnetic field intensity (B), magneto-electrodeposited (MED) coatings, developed under parallel (