Browsing by Subject "Green Inhibitors"
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Item CORROSION INHIBITION BY ALKALOIDS OF SOLANUM XANTHOCARPUM STEM FOR MILD STEEL IN 1 M H2SO4 SOLUTION(Amrit Campus, 2023-08-17) THAPA, ONISHAAlkaloids from Solanum xanthocarpum stem were successfully extracted. Extracted alkaloids were characterized by qualitative chemical tests and spectroscopic measurements. The effectiveness of the inhibitor was determined by weight loss and electrochemical measurement methods. From the weight loss measurement, maximum inhibition efficiency of 93.14% was achieved. The temperature effect study reveals that the inhibitor can work up to a temperature of 58 C. Electrochemical measurement reveals that alkaloids could inhibit effectively up to 98.14% and serve as a mixed type of inhibitor. A study on kinetic parameters reflects that the inhibitor forms a potential barrier to protecting the MS. The values obtained from the thermodynamic parameters study reflect that the process is a spontaneous endothermic process.Item CORROSION INHIBITION BY SHOREA ROBUSTA (SAAL) BARK EXTRACT FOR MILD STEEL CORROSION IN 1 M H2SO4 SOLUTION(Amrit Campus, 2023-08-17) BAJGAI, AJAY KUMARA novel corrosion inhibitor for mild steel (MS) corrosion has been extracted in methanol solvent from Shorea robusta bark. Qualitative chemical tests, VU, and FTIR measurements were carried out to confirm phytochemicals in the extract. The inhibition efficiency of extract has been studied by using weight loss and potentiodynamic polarization methods. The weight loss measurement has been adopted for the study of inhibitor concentration effect as well as variation of inhibition efficiency for time and temperature. Weight loss measurement reveals the maximum efficiency of 71.47% at ½ hours immersion time in 1000 ppm inhibitor concentration at 18 oC. The 1000 ppm inhibitor can work up to a temperature of 55 oC with 50% efficiency. The open-circuit potential (OCP) measurement reveals the extract as a mixed type of inhibitor. From the potentiodynamic polarization measurement results, the inhibition efficiency of the extract for MS was 93.73% and 75% in the 1000 ppm of inhibitor concentration for as-immersed and immersed conditions respectively. The adsorption isotherm and thermodynamic parameters support that the process is spontaneous and endothermic.