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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Corrosion inhibition of carbon steel and antibacterial properties of aminotris-(methylenephosphonic) acid
Materials Chemistry and Physics, Volume 119, No. 1-2, Year 2010
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Description
In this work, the corrosion inhibition property and the antibacterial activity of the aminotris-(methylenephosphonic) acid (ATMP) have been studied. ATMP has been evaluated as a corrosion inhibitor for carbon steel in 1 M HCl solution using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. According to the experimental results, the inhibition efficiency increased with increasing inhibitor concentration. Tafel polarization study showed that the ATMP acts as a mixed inhibitor. Data, obtained from EIS measurements, were analyzed to model the corrosion inhibition process through appropriate equivalent circuit models. Adsorption of ATMP on the carbon steel surface obeyed the Langmuir adsorption isotherm. The calculated ΔGads value showed that the corrosion inhibition of the carbon steel in 1 M HCl is mainly controlled by a physisorption process. In addition, the effect of immersion time on the corrosion of carbon steel was also studied in this work using ac impedance technique. The corrosion inhibition mechanism of ATMP was discussed. This inhibitor can be also used as biocide in aqueous environments. Our results showed that ATMP have an antibacterial effect against both Gram positive and Gram negative bacteria. The lowest MIC (0.2 mg l-1) was measured for Pseudomonas fluorescens while the highest MIC was measured for Escherichia coli (3.1 mg l-1). In addition, the results showed that the MIC of ATMP against Listeria innocua in a buffered medium (pH 6.5) was of ca. 4-fold higher than MIC measured in unbuffered medium. Thus, our findings showed that the antibacterial activity of ATMP is a result of a combined effect of the pH solution and the chemical nature of the used phosphonate molecule. © 2009 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Labjar, Najoua
Morocco, Rabat
Faculté Des Sciences Rabat
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Lebrini, Mounim
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Bentiss, F.
Morocco, El Jadida
Faculté Des Sciences D'el Jadida
Chihib, Nour Eddine
France, Villeneuve-d'ascq
Institut Charles Viollette
El Hajjaji, S.
Morocco, Rabat
Faculté Des Sciences Rabat
Jama, Charafeddine
France, Villeneuve-d'ascq
Unité Matériaux et Transformations Umet
Statistics
Citations: 224
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1016/j.matchemphys.2009.09.006
ISSN:
02540584
Research Areas
Environmental