Benzyl triphenyl phosphonium bromide as a corrosion inhibitor: A multifaceted study on aluminium protection in acidic environment Mansi Y. Chaudhary, Meenakshi Gupta, Yudhvir Singh Sharma, Prerna Bansal, Shikha Kaushik, Rajni Kanojia, Manish Kumar Gautam, Shramila Yadav Journal of Ionic Liquids, 2025 • BTPB exhibits remarkable corrosion inhibition performance, achieving efficiencies of up to 98.51 %, even at elevated temperatures (up to 328 K). • Tafel polarization studies show BTPB influences both anodic and cathodic reactions, classifying it as a mixed-type inhibitor. • The adsorption of BTPB onto the aluminum surface best fits the Langmuir isotherm, suggesting a monolayer adsorption process. • EIS results confirm increased charge transfer resistance (R ct ) with increasing BTPB concentration, further indicating improved corrosion protection. • DFT calculations demonstrate BTPB's electron-donating and accepting capabilities, explaining its interaction with the aluminum surface and its effectiveness as a corrosion inhibitor. Corrosion, a globally recognized issue, leads to reduced efficiency, significant economic losses, and the depletion of natural resources. Ionic liquids, particularly phosphonium-based compounds, are considered environmentally benign and sustainable alternatives. In this study, the use of Benzyl Triphenyl Phosphonium Bromide (BTPB) as a novel and efficient corrosion inhibitor for 6106 aluminum alloy in hydrochloric acid was investigated through electrochemical and surface analysis techniques. Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and weight loss measurements were employed to evaluate its inhibition performance. BTPB exhibited an exceptional maximum inhibition efficiency of 95.95 % at 308 K, with efficiency improving with increasing concentration. Adsorption studies indicated that BTPB follows the Langmuir adsorption isotherm, while thermodynamic analysis provided deeper insights into the adsorption mechanism. Furthermore, surface characterization by scanning electron microscopy (SEM), atomic force microscopy (AFM), and density functional theory (DFT) calculations supported the experimental findings, confirming strong interactions between BTPB molecules and the aluminum surface. The outstanding inhibition efficiency, combined with the green and environmentally friendly nature of BTPB, underscores its potential as an advanced corrosion inhibitor for aluminum alloys in acidic environments.
Allyl triphenyl phosphonium bromide, an ionic liquid as an eco-friendly and green inhibitor for corrosion of aluminium in hydrochloric acid: Mechanistic insights and experimental validation Mansi Y. Chaudhary, Meenakshi Gupta, Prerna Bansal, Yudhvir S. Sharma, Neelu Dheer, Arun Kant, M. Ramananda Singh, Shramila Yadav Sustainable Chemistry for the Environment, 2025 Allyl Triphenyl Phosphonium Bromide (ATPB), an ionic liquid was used as an inhibitor for mitigation of corrosion of aluminium in a 0.5 M hydrochloric acid. The mitigating properties of Allyl Triphenyl Phosphonium Bromide was experimentally evaluated through gravimetric, potentiodynamic polarization and electrochemical impedance techniques. The highest inhibition efficiency of 99.95% was achieved at 308 K. The mitigation of corrosion was caused by the spontaneous assembly of an ATPB monolayer onto the aluminium surface. As the concentration of ATPB rises, the extent of adsorption also increases. The accumulation of ATPB molecules over aluminium surface obeys the Langmuir adsorption isotherm. The strength of adsorption is also enhanced through the electrostatic interaction of bromide anion with the surface of aluminium. The enhancement of charge transfer resistance (R ct ) values on addition of ATPB in electrochemical impedance spectroscopic studies in comparison over the R ct value in HCl without ATPB reveals that charge transfer mechanism is involved in the inhibition process. The decrease in double layer capacitance (C dl ) also occurred along with an increase in concentrations. This suggests, the adsorption is the key to the inhibition of corrosion of aluminium. SEM micrograms and EDXS confirmed the presence of a protective ATPB layer on the aluminium surface. Density functional theory (DFT) calculation also supports the experimental observation. • ATPB is an effective inhibitor with its efficiency ranging from 99% to 60% at various concentrations. • ATPB prevents corrosion of aluminium via two possible mechanisms – one by obstructing the accessible surface area and other due to the synergistic effect provided by the counter bromide ions (Br - ). • The adsorption of ATPB on the surface of aluminium follows Langmuir Adsorption Isotherm. • The efficiencies evaluated from impedance measurements are in sync with the same provided from gravimetric and potentiodynamic studies. • The scanning electron microscopic images support the results obtained from other experimental studies. The EDXS also suggest that the mechanism of inhibition is via the adsorption of ATPB molecules on the surface of Aluminium. • Computational examinations also indicate that ATPB effectively mitigates corrosion coordinating the exchange of electrons with the metal surface.
Towards sustainable corrosion inhibition: A combined experimental and computational study of ethyl triphenyl phosphonium iodide on aluminium in acidic medium Mansi Y. Chaudhary, Shramila Yadav, Prerna Bansal, Yudhvir S. Sharma, Manish Gautam, Charu Chandra, Amarpreet K. Kalra, Meenakshi Gupta Sustainable Chemistry for the Environment, 2025 The quest for innovative and effective corrosion inhibitors, alongside advanced methodologies for corrosion monitoring and quantification, remains pivotal across diverse industrial domains. This study explores the potential of ethyl triphenyl phosphonium iodide (ETPI) as a high-performance corrosion inhibitor for aluminium in a 0.5 M hydrochloric acid medium. Employing three complementary experimental techniques—weight loss analysis, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS)—the research demonstrates consistent and reliable results across varying temperatures and ETPI concentrations. A notable decline in inhibition efficiency was observed at reduced ETPI concentrations and elevated temperatures, underscoring the dynamic interplay between environmental factors and inhibitor performance. Crucially, the adsorption behavior of ETPI aligns with the Flory-Huggins adsorption isotherm, with thermodynamic parameters (∆G 0 ads , ∆H 0 ads , ∆S 0 ads , and K ads ) and kinetic activation energy (E a ) providing deeper insights into the adsorption mechanisms. Additionally, quantum chemical simulations reveal the molecular attributes of ETPI responsible for robust chemisorption interactions with the aluminium surface. These findings are further validated by scanning electron microscopy (SEM) images and energy-dispersive X-ray (EDX) spectroscopy, which confirm the inhibitor's efficacy and surface-protective properties. The study not only reinforces ETPI’s viability as an effective corrosion inhibitor but also provides a comprehensive framework combining experimental, thermodynamic, and theoretical approaches, paving the way for the development of next-generation corrosion mitigation strategies.
Experimental investigation of anti-corrosive behaviour of Beta vulgaris: A green approach Shramila Yadav, Shikha Kaushik, Neelu Dheer, Sarita Kumar, Gurmeet SIngh, Mansi Chaudhary, Meenakshi Gupta Journal of Applied and Natural Science, 2023 The loss of metals due to corrosion can be prevented using green inhibitors. Using natural and eco-friendly plant products is futuristic, preventing the environment from toxic and harmful chemicals. The present study aimed to investigate whole beetroot (BR, Beta vulgaris) for its anti-corrosion behaviour by galvanostatic polarization and electrochemical impedance techniques at a temperature between 298 K- 328 K. The temperature study would help in proposing BR's adsorption mechanism on metal surfaces. The maximum inhibition efficiency of 94% at 298 K for 5% BR was observed, whereas a minimum of 75% was obtained for 1% BR at 328 K. It was found to be a mixed-type inhibitor that followed Langmuir isotherm. From thermodynamic studies, ΔGoads was found to be -13.64 kJ/mol, which revealed that BR adsorbed physically on the surface of mild steel. Rct values increased while Cdl values decreased on exposure of metal surface with BR extract. The scanning electron micrographs (SEM) and atomic force micrographs (AFM) witnessed the formation of a protective layer on the mild steel surface, which served as a barrier between the metal and corrosive medium. The present study provides a remedy for the financial and structural losses due to metal corrosion in an acidic medium.
A Green and environmentally benign strategy for aluminium corrosion inhibition using a phosphonium-based ionic liquid S Yadav, MY Chaudhary, N Azad, P Bansal, M Gupta Journal of Molecular Liquids 441, 129061 , 2026 2026.0 Citations: 1
Quantitative and qualitative insights into the corrosion mitigation mechanism of N, N-dibutyl aniline for mild steel in sulfuric acid M Gupta, MY Chaudhary, N Azad, S Yadav Extreme Materials 1 (3), 44-60 , 2025 2025.0 Citations: 4
Benzyl triphenyl phosphonium bromide as a corrosion inhibitor: A multifaceted study on aluminium protection in acidic environment MY Chaudhary, M Gupta, YS Sharma, P Bansal, S Kaushik, R Kanojia, ... Journal of Ionic Liquids 5 (1), 100152 , 2025 2025.0 Citations: 8
Towards sustainable corrosion inhibition: A combined experimental and computational study of ethyl triphenyl phosphonium iodide on aluminium in acidic medium MY Chaudhary, S Yadav, P Bansal, YS Sharma, M Gautam, C Chandra, ... Sustainable Chemistry for the Environment 9, 100221 , 2025 2025.0 Citations: 10
Allyl triphenyl phosphonium bromide, an ionic liquid as an eco-friendly and green inhibitor for corrosion of aluminium in hydrochloric acid: mechanistic insights and … MY Chaudhary, M Gupta, P Bansal, YS Sharma, N Dheer, A Kant, ... Sustainable Chemistry for the Environment 9, 100206 , 2025 2025.0 Citations: 9
Inhibitory potential of N-Methyl formanilide on mild steel corrosion in sulfuric acid: quantum chemical and experimental perspectives M Gupta, N Azad, MY Chaudhary, YS Sharma, S Yadav Asian J. Chem 36 (11), 2521-2529 , 2024 2024.0 Citations: 3
Abdominal obesity in India: analysis of the national family health survey-5 (2019–2021) data. Lancet Reg Health Southeast Asia. 2023; 14: 100208 M Chaudhary, P Sharma, A Pandey, S Pal, P Dhillon 2023.0 Citations: 11
An involvement of ionic liquids and other small molecules as promising corrosion inhibitors in recent advancement of technologies in chemical industries S Pal, M Chaudhary, P Jain, P Singh, AK Yadav, SK Singh, I Bahadur Advanced Applications of Ionic Liquids, 223-245 , 2023 2023.0 Citations: 3
Role of ionic liquids and their future alternative toward protein chemistry M Chaudhary, S Pal, K Kumari, I Bahadur, G Gambhir, P Singh Advanced applications of ionic liquids, 417-441 , 2023 2023.0 Citations: 1
Experimental investigation of anti-corrosive behaviour of Beta vulgaris: A green approach S Yadav, S Kaushik, N Dheer, S Kumar, G Singh, M Chaudhary, M Gupta Journal of Applied and Natural Science 15 (3), 1315 , 2023 2023.0 Citations: 10
Role of ionic liquids and their future alternative toward protein M Chaudhary, S Pal¹ Advanced Applications of Ionic Liquids, 417 , 2022 2022.0
DFT calculations, molecular docking and SAR investigation for the formation of eutectic mixture using thiourea and salicylic acid APS Raman, MB Singh, M Chaudhary, I Bahdur, P Jain, N Kaushik, ... Journal of Molecular Liquids 362, 119650 , 2022 2022.0 Citations: 30
Current toxicological insights of ionic liquids on various environmental living forms V Thamke, P Singh, S Pal, M Chaudhary, K Kumari, I Bahadur, RS Varma Journal of Environmental Chemical Engineering 10 (2), 107303 , 2022 2022.0 Citations: 47
A mini review on synthesis, properties and applications of deep eutectic solvents MBS Mr, VSK Mr, M Chaudhary, P Singh Journal of the Indian Chemical Society 98 (11), 100210 , 2021 2021.0 Citations: 134
Skin ageing: pathophysiology and current market treatment approaches. Curr Aging Sci 13: 22–30 M Chaudhary, A Khan, M Gupta 2020.0 Citations: 5
Pleomorphic adenoma of hard palate: a rare case M Chaudhary, M Gupta, A Sharma J Otolaryngol Forecast. 2018; 1 (1) 1005 , 2018 2018.0 Citations: 1
Benzyl Triphenyl Phosphonium Bromide as a Corrosion Inhibitor: A Multifaceted Study on Aluminium Protection in Acidic Environment S Yadav, MY Chaudhary, M Gupta, YS Sharma, P Bansal, R Kanojia, ... Available at SSRN 5082699 , 0 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
A mini review on synthesis, properties and applications of deep eutectic solvents MBS Mr, VSK Mr, M Chaudhary, P Singh Journal of the Indian Chemical Society 98 (11), 100210 , 2021 2021.0 Citations: 134
Current toxicological insights of ionic liquids on various environmental living forms V Thamke, P Singh, S Pal, M Chaudhary, K Kumari, I Bahadur, RS Varma Journal of Environmental Chemical Engineering 10 (2), 107303 , 2022 2022.0 Citations: 47
DFT calculations, molecular docking and SAR investigation for the formation of eutectic mixture using thiourea and salicylic acid APS Raman, MB Singh, M Chaudhary, I Bahdur, P Jain, N Kaushik, ... Journal of Molecular Liquids 362, 119650 , 2022 2022.0 Citations: 30
Abdominal obesity in India: analysis of the national family health survey-5 (2019–2021) data. Lancet Reg Health Southeast Asia. 2023; 14: 100208 M Chaudhary, P Sharma, A Pandey, S Pal, P Dhillon 2023.0 Citations: 11
Towards sustainable corrosion inhibition: A combined experimental and computational study of ethyl triphenyl phosphonium iodide on aluminium in acidic medium MY Chaudhary, S Yadav, P Bansal, YS Sharma, M Gautam, C Chandra, ... Sustainable Chemistry for the Environment 9, 100221 , 2025 2025.0 Citations: 10
Experimental investigation of anti-corrosive behaviour of Beta vulgaris: A green approach S Yadav, S Kaushik, N Dheer, S Kumar, G Singh, M Chaudhary, M Gupta Journal of Applied and Natural Science 15 (3), 1315 , 2023 2023.0 Citations: 10
Allyl triphenyl phosphonium bromide, an ionic liquid as an eco-friendly and green inhibitor for corrosion of aluminium in hydrochloric acid: mechanistic insights and … MY Chaudhary, M Gupta, P Bansal, YS Sharma, N Dheer, A Kant, ... Sustainable Chemistry for the Environment 9, 100206 , 2025 2025.0 Citations: 9
Benzyl triphenyl phosphonium bromide as a corrosion inhibitor: A multifaceted study on aluminium protection in acidic environment MY Chaudhary, M Gupta, YS Sharma, P Bansal, S Kaushik, R Kanojia, ... Journal of Ionic Liquids 5 (1), 100152 , 2025 2025.0 Citations: 8
Skin ageing: pathophysiology and current market treatment approaches. Curr Aging Sci 13: 22–30 M Chaudhary, A Khan, M Gupta 2020.0 Citations: 5
Quantitative and qualitative insights into the corrosion mitigation mechanism of N, N-dibutyl aniline for mild steel in sulfuric acid M Gupta, MY Chaudhary, N Azad, S Yadav Extreme Materials 1 (3), 44-60 , 2025 2025.0 Citations: 4
Inhibitory potential of N-Methyl formanilide on mild steel corrosion in sulfuric acid: quantum chemical and experimental perspectives M Gupta, N Azad, MY Chaudhary, YS Sharma, S Yadav Asian J. Chem 36 (11), 2521-2529 , 2024 2024.0 Citations: 3
An involvement of ionic liquids and other small molecules as promising corrosion inhibitors in recent advancement of technologies in chemical industries S Pal, M Chaudhary, P Jain, P Singh, AK Yadav, SK Singh, I Bahadur Advanced Applications of Ionic Liquids, 223-245 , 2023 2023.0 Citations: 3
A Green and environmentally benign strategy for aluminium corrosion inhibition using a phosphonium-based ionic liquid S Yadav, MY Chaudhary, N Azad, P Bansal, M Gupta Journal of Molecular Liquids 441, 129061 , 2026 2026.0 Citations: 1
Role of ionic liquids and their future alternative toward protein chemistry M Chaudhary, S Pal, K Kumari, I Bahadur, G Gambhir, P Singh Advanced applications of ionic liquids, 417-441 , 2023 2023.0 Citations: 1
Pleomorphic adenoma of hard palate: a rare case M Chaudhary, M Gupta, A Sharma J Otolaryngol Forecast. 2018; 1 (1) 1005 , 2018 2018.0 Citations: 1
Benzyl Triphenyl Phosphonium Bromide as a Corrosion Inhibitor: A Multifaceted Study on Aluminium Protection in Acidic Environment S Yadav, MY Chaudhary, M Gupta, YS Sharma, P Bansal, R Kanojia, ... Available at SSRN 5082699 , 0 Citations: 1
Role of ionic liquids and their future alternative toward protein M Chaudhary, S Pal¹ Advanced Applications of Ionic Liquids, 417 , 2022 2022.0