6 research outputs found
Evaluation of Ficus krishnae plant leaves extract as a potent green and sustainable corrosion inhibitor for low-carbon steel in 1.0 M HCl medium
No full text560-575Ficus krishnae plant leaf extract (FKLE) has been utilized to mitigate the corrosion of low-carbon steel (LCS) in a 1M
HCl environment. The efficacy of FKLE on LCS has been evaluated using weight loss measurements, electrochemical
impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) techniques. Maximum corrosion inhibition
efficiencies of 98.31%, 94.31%, and 96.39% have been observed via weight loss, EIS, and PDP methods respectively, at an
optimal concentration of 150 ppm FKLE. The inhibitor molecules have reduced both anodic and cathodic reactions in the
acidic medium, demonstrating mixed-type inhibition behavior. Corrosion control has occurred through adsorption
phenomena, adhering to the Langmuir adsorption isotherm. Thermodynamic analysis has indicated that the inhibition
process is spontaneous and exothermic. Scanning electron microscope (SEM) and transmission electron microscope (TEM)
images have revealed severe damage to the LCS surface in the absence of FKLE, while significant protection has been
provided in its presence. Atomic force microscopy (AFM) images have shown reduced surface roughness on the corroded
LCS surface with FKLE addition. Water contact angle (WCA) measurements have demonstrated that FKLE-treated LCS
surfaces possess increased hydrophobicity, whereas untreated LCS surfaces remain more hydrophilic, enhancing
susceptibility to acid attack
Investigation of Laurus Tamala leaves extract as an environmentally acceptable corrosion inhibitor for soft steel in 1M HCl: Electrochemical, DFT, and surface characterization techniques
No full text492-505Laurus Tamala leaves extract (LTLE) has been employed as a soft steel corrosion inhibitor in a 1M Hydrochloric acid
media. Chemical (weight loss) and electrochemical investigations were carried out to assess the corrosion rate and
percentage inhibition efficiency of the extract. The electrochemical polarization results have demonstrated that plant leaves
extract functions as a mixed type inhibitor. The stability of the inhibitor is tested at elevated temperatures by weight loss
method. The corrosion inhibition mechanism is interpreted through adsorption mechanism, and the LTLE components has
obeyed the Langmuir adsorption isotherm for soft steel. The interaction of the components of the extract is assessed through
FT-IR technique. The surface morphology, roughness and hydrophobicity in presence and absence of the extract have been
characterized through SEM, AFM and water contact angle techniques respectively. The highest inhibitory efficiency is
96.21% for 24 h as recorded by weight loss method. Additionally, the DFT computations has revealed the inhibitor’s
adsorption through electron donor-acceptor interactions
Investigation of corrosion inhibition of low carbon steel using expired drug Levocetirizine as a potential corrosion inhibitor in 0.5 M H2SO4 medium
No full textAbstract The inhibitory properties of low carbon steel (LCS) surface in 0.5 M H2SO4 medium were assessed using expired Levocetirizine (LCZN) drug through chemical and electrochemical methods. Gravimetric analysis demonstrated the drug's ability to inhibit corrosion on LCS surface with 95.16 percentage inhibition efficiency (%IE). Polarization results demonstrated that LCZN acted as a mixed-type inhibitor with IE. of 97.05%. Impedance analysis further substantiated the presence of LCZN adsorption on the LCS surface. The inhibition efficiency is interpreted through the adsorption phenomenon. Several investigations, such as FT-IR, (SEM)-EDS, and TEM analysis unveiled adsorption on the LCS surface. Further validations carried out using quantum chemical calculations
Expired Lircetam drug as a corrosion inhibitor for low-carbon steel in 1 M HCl: Experimental, theoretical, and quantum chemical insights
No full textLircetam (LRTM) is a drug used for the treatment of epilepsy. The disposal of expired LRTM poses environmental risks, yet it retains active components that can be repurposed. This research investigates the application of expired LRTM as a corrosion inhibitor for low-carbon steel (LCS) in a 1 M HCl solution. Electrochemical methods, including Tafel polarization (PDP) and electrochemical impedance spectroscopy (EIS), alongside weight loss measurements, were employed to evaluate the efficacy of LRTM in protecting LCS against corrosion. The highest inhibition efficiencies was reported 98.16%, at 60 ppm optimal concentration. The adsorption behavior of LRTM molecules follows the Langmuir isotherm model. Surface analysis through scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that the LCS surface remained largely unaffected by the acid solution in the presence of LRTM. Contact angle (CA) measurements revealed that the adsorption of LRTM molecules increased the hydrophobicity of the LCS surface. LRTM acts as a mixed-type inhibitor, impeding both anodic and cathodic reactions. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations provided further insight into the chemical interactions between LRTM and the LCS surface. This research introduces the novel application of expired lircetam, highlighting its non-toxic nature and cost-effectiveness, making it a promising alternative for corrosion prevention in industrial applications. This study investigates the dual role of Lircetum in addressing expired pharmaceutical waste and developing an efficient corrosion inhibitor for LCS in acidic environments. Repurposing expired Lircetum provides a sustainable solution to environmental hazards while demonstrating high corrosion inhibition efficiency
Investigation of Laurus Tamala leaves extract as an environmentally acceptable corrosion inhibitor for soft steel in 1M HCl: Electrochemical, DFT, and surface characterization techniques
Get PDFLaurus Tamala leaves extract (LTLE) has been employed as a soft steel corrosion inhibitor in a 1M Hydrochloric acid media. Chemical (weight loss) and electrochemical investigations were carried out to assess the corrosion rate and percentage inhibition efficiency of the extract. The electrochemical polarization results have demonstrated that plant leaves extract functions as a mixed type inhibitor. The stability of the inhibitor is tested at elevated temperatures by weight loss method. The corrosion inhibition mechanism is interpreted through adsorption mechanism, and the LTLE components has obeyed the Langmuir adsorption isotherm for soft steel. The interaction of the components of the extract is assessed through FT-IR technique. The surface morphology, roughness and hydrophobicity in presence and absence of the extract have been characterized through SEM, AFM and water contact angle techniques respectively. The highest inhibitory efficiency is 96.21% for 24 h as recorded by weight loss method. Additionally, the DFT computations has revealed the inhibitor’s adsorption through electron donor-acceptor interactions
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Technological impact on the art of moviemaking: deploying new and convergent media to redefine a model for Pakistan’s cinema
No full textThis thesis examines the decline in Pakistani cinema during the last two decades. It examines the history of the cinema and exposes some possible, previously ignored, causes for that decline. This research led the author to ask “Can new and convergent media be helpful in reviving the Pakistani cinema?” The thesis introduces the ideas of established and emergent cinema, building on the work of Williams (1977) in discussing the ideas of dominant, residual and emergent culture. The exploration reveals two gaps in the film industry: first, the lack of training in the making of films; and, second, the change in possible production methods allowed by new and emergent technologies. The thesis addresses both of these gaps by suggesting new production paradigms which incorporate the new technology and by examining two scripts to develop methodologies for teaching. The scripts are produced into films as the practice section of the research. The first film, creative element 1, is developed using some of the new tehnologies, students as crew and the available resources of an educational establishment to test the methodologies that have been derived. The outcomes of the creative element 1 laid the foundation of the second film, creative element 2. It is shot on mobile phones and distributed from Pakistan through Vimeo with a negligible budget. The social networks helped to arrange equipment and locations and allowed extreme freedom to the filmmaker
