Corrosion inhibition potentials of ampicillin for mild steel in hydrochloric acid solution
Open Access
- 16 April 2015
- journal article
- Published by Taylor & Francis Ltd in Journal of Taibah University for Science
- Vol. 9 (2), 196-202
- https://doi.org/10.1016/j.jtusci.2014.10.002
Abstract
Ampicillin [(2S,6R)-6-(2-(aminomethyl)benzamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0) heptanes-2-carboxylic acid], an antibiotic drug was investigated as corrosion inhibitor for mild steel in HCl using gravimetric method. The results obtained showed that various concentrations of ampicillin studied inhibited the corrosion of mild steel in solutions of HCl. The inhibition efficiency increased with increase in the concentrations of ampicillin and decreased with increase in temperature of which the inhibitor of concentration 5×10−3M at 30°C had the highest inhibition efficiency of 75.85%. Its adsorption was found to be physical, exothermic and spontaneous as confirmed by values of activation energy and free energy of adsorption (around −20kJmol−1 for adsorption and below 80kJmol−1 for activation energy) and also fitted the Langmuir adsorption model. Quantum chemical calculations results show that ampicillin possesses a number of active centers concentrated mainly on the nitrogen atoms and the neighboring C atoms. The HOMO and LUMO plots of ampicillin further present ampicillin as an effective corrosion inhibitorKeywords
This publication has 10 references indexed in Scilit:
- Experimental and Quantum Chemical Studies on the Corrosion Inhibition Potentials of 2-(2-Oxoindolin-3-Ylideneamino) Acetic Acid and Indoline-2,3-DioneInternational Journal of Electrochemical Science, 2011
- Adsorption and Quantum Chemical Studies on the Inhibition Potentials of Some Thiosemicarbazides for the Corrosion of Mild Steel in Acidic MediumInternational Journal of Molecular Sciences, 2010
- Adsorption and Quantum Chemical Studies on Cloxacillin and Halides for the Corrosion of Mild Steel in Acidic MediumInternational Journal of Electrochemical Science, 2010
- Corrosion inhibition of mild steel in 1M HCl solution by henna extract: A comparative study of the inhibition by henna and its constituents (Lawsone, Gallic acid, α-d-Glucose and Tannic acid)Corrosion Science, 2009
- Adsorption Characteristics and Corrosion Inhibitive Properties of Clotrimazole for Aluminium Corrosion in Hydrochloric AcidInternational Journal of Electrochemical Science, 2009
- Streptomycin: A commercially available drug as corrosion inhibitor for mild steel in hydrochloric acid solutionMaterials Letters, 2009
- Eco‐friendly corrosion inhibitors: the inhibitive action of Delonix Regia extract for the corrosion of aluminium in acidic mediaAnti-Corrosion Methods and Materials, 2007
- Inhibitive action of Carica papaya extracts on the corrosion of mild steel in acidic media and their adsorption characteristicsPigment & Resin Technology, 2007
- Inhibition of aluminum corrosion using Opuntia extractCorrosion Science, 2003
- Aqueous extract of Rosmarinus officinalis L. as inhibitor of Al–Mg alloy corrosion in chloride solutionJournal of Applied Electrochemistry, 2000