Accessible Unlicensed Requires Authentication Published by De Gruyter November 13, 2017

Ester-Based Pyridinium Gemini Surfactants as Novel Inhibitors for Mild Steel Corrosion in 1 M HCl Solution

Estergruppen-haltige Pyridinium-Gemini-Tenside als neuartige Inhibitoren für Korrosion von Weichstahl in 1 M HCl-Lösung
Mohammad Mobin and Ruby Aslam

Abstract

The corrosion inhibition ability of ester based pyridinium Gemini surfactants (GS) with different hydrophobic character (14-Py and 16-Py) towards mild steel (MS) in 1 M HCl solution was investigated at various concentrations and temperatures (303–333 K). Potentiodynamic polarization, electrochemical impedance spectroscopy, weight loss, surface analysis (SEM/EDAX and AFM) and FT-IR were combined to investigate the corrosion inhibition behaviour of the surfactants. 14-Py and 16-Py were found to be efficient, mixed type inhibitors. The inhibition efficiencies increased with increasing concentration, hydrophobicity and solution temperature. The existence of a protective film of the adsorbed inhibitors on the MS surface was confirmed by SEM/EDX/AFM.

Kurzfassung

Die Fähigkeit von estergruppenhaltigen Pyridinium-Gemini-Tensiden (GS) mit unterschiedlichem hydrophobem Charakter (14-Py und 16-Py), die Korrosion gegenüber Weichstahl (MS) in 1 M HCl-Lösung zu inhibieren, wurde bei verschiedenen Konzentrationen und Temperaturen (303–333 K) untersucht. Potentiodynamische Polarisation, elektrochemische Impedanzspektroskopie, Gewichtsverlust, Oberflächenanalyse (SEM/EDAX und AFM) und FT-IR wurden kombiniert, um das Korrosionsinhibierungsverhalten der Tenside zu untersuchen. 14-Py und 16-Py agierten als effiziente Misch-Inhibitoren. Die Inhibitionswirkung stieg mit zunehmender Konzentration, Hydrophobie und Lösungstemperatur. Die Existenz eines Schutzfilms aus an der MS-Oberfläche adsorbierten Inhibitoren wurde durch SEM, EDX, AFM bestätigt.


*Correspondence address, Mohammad Mobin, Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India, Tel.: +919411491161, Fax: +915712701895, E-Mail:

Mohammad Mobin is a Professor in the Department of Applied Chemistry, Aligarh Muslim University Aligarh, India. He received his M. Sc., M. Phil. and Ph. D. degrees from the same university. He has also served as Researcher at Saline Water Conversion Corporation, Saudi Arabia. His present research interests are in the area of surfactants, natural and synthetic polymers as corrosion inhibitors.

Ruby Aslam, is currently a Ph. D. student in the Department of Applied Chemistry, Aligarh Muslim University, Aligarh, India. She received her M. Sc. and M.Phil degrees from the same university.


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Received: 2016-10-15
Accepted: 2017-01-12
Published Online: 2017-11-13
Published in Print: 2017-11-15

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