2-Aminobenzene-1,3-dicarbonitriles as green corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, thermodynamic, surface and quantum chemical investigation

Verma, Chandrabhan; Quraishi, M. A.; Singh, Ambrish

doi:10.1016/j.jtice.2014.11.029

Cited by 148 publications

(61 citation statements)

References 34 publications

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“…In acid solution, the inhibitor molecules are adsorbed on the metal surface and form a protective smooth film on metal surface. The adsorbed layer of inhibitor isolates the metal surface from the surrounding corrosive medium by forming a barrier between metal/solution interfaces [38] and hence mitigates the corrosion.…”

Section: Surface Characterizationmentioning

confidence: 99%

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

et al. 2017

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The application of expired drugs as corrosion inhibitors provides a cost effective and environmentally benign alternative to otherwise tedious and costly disposal/ degradation process. In this context, we herein investigate the use of expired atorvastatin (EA) for corrosion inhibition of mild steel in 1 M HCl solution using weight loss, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (Tafel) methods. Fresh atorvastatin (FA) drug was also used for above studies for comparison purpose to understand whether there is any significant difference between the inhibition efficiency of the two after the expiration date of the drug. EIS analysis shows an increase in polarization resistance due to the adsorbed inhibitor molecules on metal surface. Potentiodynamic polarization indicates that both the EA and FA act as mixed-type inhibitors but predominantly behave as cathodic inhibitors. The adsorption of EA and FA on mild steel surface follows the Langmuir adsorption isotherm. SEM shows a smoother surface of mild steel in the presence of FA and EA drug in acidic solution. Both the fresh drug and its expired counterpart showed almost similar results in all the studies, thereby verifying the validity of the expired atorvastatin drug as a novel and efficient corrosion inhibitor for mild steel.

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Section: Surface Characterizationmentioning

confidence: 99%

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

et al. 2017

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“…BCS-CRM no.113, Cast Austenitic manganese steel and pyrolusite. The results of the analysis of standard reference materials are recorded in Table- Quantum chemical studies: The density function theory (DFT) is very important theoretical model used in elucidating the chemistry of molecules and science of solids [29]. Various chemical concepts have been correlated using framework of density function theory (DFT) [30].…”

Section: Interference Of Metal Ionsmentioning

confidence: 99%

“…lowest unoccupied molecular orbital (ELUMO), highest occupied molecular orbital (EHOMO) and the energy gap ∆E (ELUMO-EHOMO) were calculated from optimized structure of OHA. These parameters were used to explain the interaction between OHA with metal ion(s) [29]. Therefore, quantum chemical using DFT was used to explain the reducing behaviour of OHA discussed in the present investigation.…”

Section: Interference Of Metal Ionsmentioning

confidence: 99%

Reductometric Titration and Quantum Chemical Study of Oxalohydroxamic Acid for Determination of Manganese in Ores and Alloys

Agrawal¹,

Khan²,

Verma³

et al. 2017

Asian J. Chem.

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Oxalohydroxamic acid has been employed as a reductometric titrant for the determination of manganese in 2 N sulphuric acid. Stoichiometry of the reaction is established. One mole of oxalohydroxamic acid was found to consume 12 equivalents of KMnO4. The titre values are obtained by second derivative plots of potentiometric titrations. The effect of diverse ions, temperature, time, sulphuric acid concentration and concentration of reacting substances on the stoichiometry of the reaction were studied. The results obtained are reproducible. This study also presents molecular orbital/density functional theory (MO/DFT) for calculations of the electronic structure and reducing property of oxalohydroxamic acid for metal determination. A good agreement is found between the predicted properties of oxalohydroxamic acid and experimental and theoretical results.

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“…Organic inhibitors build up a protective hydrophobic film of adsorbed molecules on the metal surface which provides a barrier to the dissolution of the metal in the electrolyte [4,5]. These inhibitors must be soluble or dispersible in the medium surrounding the metal [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of corrosion pattern of AISI 316 and AISI 304 stainless steels in Na2B4O7·5H2O solution

Akgül¹,

Gerengi²,

Camlibel³

et al. 2017

Int. J. Corros. Scale Inhib.

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The corrosion behaviour of AISI 316 and AISI 304 stainless steels in Na 2 B 4 O 7 ·5H 2 O solutions with various concentrations (3%, 6% and 9% w/w) commonly used in wood industry was investigated by using electrochemical impedance spectroscopy and polarisation techniques. The results reveal that the dissolution pattern of the studied steel samples is in the order 3% > 6% > 9%. The AISI 316 stainless steel is found to exhibit better corrosion resistance than the 304-type stainless steel alloy.

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2-Aminobenzene-1,3-dicarbonitriles as green corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, thermodynamic, surface and quantum chemical investigation

Cited by 148 publications

References 34 publications

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

Expired atorvastatin drug as corrosion inhibitor for mild steel in hydrochloric acid solution

Reductometric Titration and Quantum Chemical Study of Oxalohydroxamic Acid for Determination of Manganese in Ores and Alloys

Investigation of corrosion pattern of AISI 316 and AISI 304 stainless steels in Na2B4O7·5H2O solution

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