Browsing by Author "Thilagavathy, P"
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Item Characterisation of various Stage Effluent in Tannery Industry and Efficiency of Combined Effluent Treatment After Chromium Recovery(1998-04) Thilagavathy, P; Banumathi, SItem Comparison of Corrosion Mitigation Efficiency of Seed Coat of Coffea Arabica for Mild Steel In 1 M Hcl and 0 .5 M H2So4(2010) Saratha, R; Shyamala, R; Thilagavathy, PThe protection efficiency of seed coat of Coffea Arabica fruit extract on the corrosion of mild steel in 1 M HCI and 0.5 M H2SO4 were evaluated by using Gravimetric method. The study was carried out by varying the parameters like inhibitor concentration, immersion period and temperature. The maximum efficiency was obtained at 2.5 %(v/v) concentration of the inhibitor in both 1 M HCI and 0.5 M HzS04. The protective action of the acid extract was maximum at 12 h in both 1M HCI and 0.5 M H2SO4. In the temperature study the maximum efficiency was obtained at 333 K in 1M HCI and at 323 K in 0.5 M H2SO4.Item Corrosion Mitigation of Mild Steel in Acidic Media with the Extracts of Cassia Fistula, Bougainvillea Spectabilis Leaves and Mirabilis Jalapa Flowers(2011-06-22) Thilagavathy, P; Saratha, RItem Mirabilis Jalapa flowers extract as corrosion inhibitor for the mild steel corrosion in IM HCl(2015) Thilagavathy, P; Saratha, RThe corrosion inhibition efficiency o f the acid extract o f mirabilis jalapa flowers fo r the dissolution o f mild steel in IM HCl was studied at different concentrations o f the extract, various immersion periods and at certain elevated temperatures. Data were fit into Langmuir and Temkin isotherms. Activation energy (Efi, Entropy change (AS), Enthalpy change (AH) and Heat o f adsorption (Q„,tJ were obtained from the Arrhenius plot. Nyquist and Bode plots were obtained to discuss the mode o f inhibition and the inhibition efficiency was calculated from the electrochemical kinetic parameters.