Faculty Publications

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    Corrosion inhibition of 6061 Al-15 vol. pct. SiC(p) composite and its base alloy in a mixture of sulphuric acid and hydrochloric acid by 4-(N,N-dimethyl amino) benzaldehyde thiosemicarbazone
    (2011) Geetha, G.M.; Nayak, J.; Nityananda Shetty, A.N.
    The corrosion inhibition characteristics of 4-(N,N-dimethylamino) benzaldehyde thiosemicarbazone (DMABT) on the corrosion behavior of 6061 Al-15 vol. pct. SiC(p) composite and its base alloy were studied at different temperatures in acid mixture medium containing varying concentrations of hydrochloric acid and sulphuric acid using Tafel extrapolation technique and ac impedance spectroscopy (EIS). The effect of inhibitor concentration, temperature and concentration of the acid mixture media on the inhibitor action was investigated. It was found that inhibition efficiencies increase with the increase in inhibitor concentration, but decrease with the increase in temperature and with the increase in concentration of the acid media. Thermodynamic parameters for dissolution process were determined. The adsorption of DMABT on both the composite and base alloy was found to be through physisorption obeying Freundlich adsorption isotherm. © 2010 Elsevier B.V. All rights reserved.
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    Adsorption and corrosion inhibition behaviour of Pterocarpus marsupium stem extract on mild steel in acid medium: experimental and statistical approach
    (Taylor and Francis Ltd., 2024) Lavanya, M.; Suvarna, A.S.; Kumari P, P.P.
    The undertaken work shows the efficacy of Pterocarpus marsupium stem extract (PMSE) as an eco-friendly green inhibitor to mitigate the deterioration of mild steel (MS) in various concentrations of hydrochloric acid (HCl) solution using an electrochemical technique. The experiments were conducted by considering acid concentration, inhibition concentration and temperature as the parameters to optimize the inhibition efficiency. The corrosion inhibition of PMSE predominantly owing to protective film formation on the metal surface and is confirmed by surface morphological and FTIR spectral studies. RSM studies using the Taguchi method revealed the highest inhibition efficiency to be predicted at minimum temperature and acid concentration and at the maximum inhibitor concentration as obtained in the experiments. The obtained experimental and statistical study proves PMSE as a potential green corrosion inhibitor for the corrosion inhibition of MS owing to their active constituents and eco-friendliness. © 2023 Canadian Institute of Mining, Metallurgy and Petroleum.