Atmospheric Science, General Physics and Astronomy, Geophysics, Earth and Planetary Sciences
36
Scopus Publications
Scopus Publications
Comprehensive study of garlic peel extract coating against mild steel corrosion in saline medium Bindu Mangla, Gopal Ji, Kajal Kajal, Kanak Rawat, Harshita Kaushik, Khushi Mittal, Rashmi Sehrawat, Priya Vashishth, Himanshi Bairagi, D. K. Sharma, Harish Kumar Discover Chemical Engineering, 2026 Natural materials (NMs) have emerged as better alternatives for the mitigation of corrosion of metals. NMs can be used as both inhibitors and coatings; however, they have been used mostly as inhibitors. In this work, ethanol extract of garlic peel (EEGP) has been synthesized and investigated by Fourier transform infrared (FT-IR) and UV-visible spectroscopy (UVS). The results have confirmed that biomolecules are present in the prepared extract. EEGP has been coated on mild steel (MS) by drop casting (DC) in layers (one and two). The coated MS have been examined in 0.5 M NaCl by open circuit potential (OCP) and potentiodynamic polarization (PDP) measurements. The results have shown that EEGP protect MS in 0.5 M NaCl with the maximum efficiency of 71%. The conditions of bare, coated, and corroded MS have been visually monitored through camera images and atomic force microscopy (AFM), which advocates that EEGP protect MS. Based on the results, a schematic for corrosion prevention of MS by EEGP coatings has also been proposed.
Synthesis of ethanol extract of rose petal and its coating on mild steel for corrosion prevention in sodium chloride solutions Bindu Mangla, Gopal Ji, Kajal, Kanak Rawat, Harshita Kaushik, Khushi Mittal, Priya Vashishth, Himanshi Bairagi, D.K. Sharma, Harish Kumar, Rashmi Sehrawat Next Materials, 2026 Rose petal (RP) extract, a natural and sustainable material, was investigated as a corrosion-inhibiting coating for mild steel (MS) in 0.5 M NaCl. The extract was prepared using ethanol and characterized by FTIR and UV–visible spectroscopy, confirming the presence of bioactive functional groups. One- and two-layer coatings were applied on MS via the drop-casting method. Corrosion performance was assessed using open circuit potential (OCP), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). PDP results showed inhibition efficiencies of 86% for single-layer (R1) and 91% for double-layer (R2) coatings, while EIS indicated 92% for R1 and 96% for R2. Surface analyses using optical microscopy and AFM confirmed improved protection and reduced surface roughness for coated samples. Overall, double-layer RP extract coatings effectively enhance the corrosion resistance of MS in chloride-containing environments, demonstrating their potential as eco-friendly corrosion inhibitors.
Low-carbon Materials: Transportation and Automotive Applications Low Carbon Materials Paving A Sustainable Path for A Greener Future, 2026
Low latitude, topside ionosphere composition and its variation with changeable solar activity Indian Journal of Radio and Space Physics, 2021
Low latitude ionospheric variations during geomagnetic storms measured using ROCSAT-1 satellite observations Indian Journal of Radio and Space Physics, 2020
Variations of ion density and temperature as measured by ROCSAT-1satellite over the indian region and comparison with IRI-2016 model Geeta Rana, A Bardhan, A Bardhan, D. Sharma, D. Sharma, M. Yadav, M. Yadav, Malini Aggarwal, Malini Aggarwal, Jyotika Dudeja, Jyotika Dudeja Annals of Geophysics, 2019 Topside ionospheric parameters- total ion density (Ni) and ion temperature (Ti) have been analysed at low latitude region with changing solar activity (years 1999 to 2003). The Ni and Ti data collected from ROCSAT-1 satellite has been compared with the estimated values of IRI-2016 model. The annual diurnal features observed for Ni (measured by ROCSAT-1) are: a minimum value just before local sunrise (~04:00/05:00 LT), day time peak (~13:00/14:00 LT) and then a gradual decrement throughout the evening and nighttime. The annual diurnal variation of Ti (measured by ROCSAT-1) shows that Ti exhibits a morning peak (morning overshoot, ~07:00 LT), day time trough, secondary peak (evening enhancement) followed by nighttime minima and a minimum value before the sunrise. The distinct annual diurnal feature observed by IRI model is presence/absence of a secondary peak in Ni/Ti which is vice-versa in ROCSAT-1 measurements. Some other discrepancies observed in the model are: overestimation of Ni during all the years, specifically in the morning and evening time; overestimation of Ti, during the entire day except in the morning peak hours of the year 1999, 2000 and 20003. For each year, the hourly averaged ROCSAT-1 measured value of Ni and Ti has been correlated with the estimated value of IRI-2016 model. The correlation coefficient factor R 2 is ~ 0.8 for Ni and ~ 0.9 for Ti respectively. The variations of Ni and Ti with changing solar flux have also been studied. The ionospheric parameters are found positively and linearly correlated with solar-flux (F10.7). The correlation coefficient factor R 2 for Ni and Ti with F10.7 is ~ 0.8 and ~ 0.9 respectively.
Ionospheric ion density variation in the low and mid latitude ionosphere: Possible connection with earthquake Indian Journal of Radio and Space Physics, 2010
Lienard-Wiechert potentials applied to the close electric fields due to lightning return stroke above a finitely conducting earth Indian Journal of Radio and Space Physics, 2000
