Title of article :
Synthesis and Anticorrosion Studies of Azomethine Derived from Aniline
Author/Authors :
Kassim, Karimah Institute of Science - Universiti Teknologi MARA - 40450 Shah Alam - Selangor, Malaysia - Faculty of Applied Science - Universiti Teknologi MARA - 40450 Shah Alam - Selangor, Malaysia , Nor Hashim, Nor Zakiah Centre of Foundation Studies - Universiti Teknologi MARA - 43800 Dengkil - Selangor, Malaysia , Ashraf Mohd Kahar, Muhammad Faculty of Applied Science - Universiti Teknologi MARA - 40450 Shah Alam - Selangor, Malaysia
Abstract :
Two series of azomethine compounds derived from 2-hydroxy-3-methoxybenzaldehyde (o-vanillin) with 3-nitroaniline and p-toluidine were synthesized through condensation and characterized. The synthesized compounds were elucidated via elemental analysis (CHNS), nuclear magnetic resonance (NMR) spectroscopy, and infrared (IR) spectroscopy. The corrosion inhibitory effects of two azomethine compounds, namely 2-methoxy-6-((p-tolylimino)methyl)phenol (A3) and 2-methoxy-6-(((3-nitrophenyl)imino)methyl)phenol (A4) were studied on mild steel in 1 M hydrochloric acid (HCl) by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. Based on the electrochemical measurements, azomethine compounds A3 and A4 demonstrated good inhibition efficiency (87%) on mild steel in an acidic environment. The surface morphology of the mild steel specimen was further investigated by atomic force microscopy (AFM) and scanning electron microscopy (SEM).
Keywords :
Azomethine , O-vanillin , aniline , mild steel , hydrochloric acid , EIS
Journal title :
Malaysian Journal of Chemistry
