TAILIEUCHUNG - Quantum mechanical and electrochemical investigations on corrosion inhibition properties of novel heterocyclic Schiff bases

The corrosion inhibition efficiencies of two novel Schiff bases, namely (E)-3-[thiophen-2-lmethyleneamino]benzoic acid (T2YMABA) and (E)-4-(5-[(2-phenylhydrazono) methyl]thiophen-2-yl)benzoic acid (PHMT2YBA) on mild steel (MS) in HCl solution has been investigated and compared using electrochemical impedance spectroscopy and potentiodynamic polarization analysis. | Quantum mechanical and electrochemical investigations on corrosion inhibition properties of novel heterocyclic Schiff bases Current Chemistry Letters 6 2017 177 186 Contents lists available at GrowingScience Current Chemistry Letters homepage Quantum mechanical and electrochemical investigations on corrosion inhibition properties of novel heterocyclic Schiff bases Nimmy Kuriakose K. Joby Thomas Vinod P. Raphael and C. Sini Varghese Research Division Department of Chemistry College University of Calicut Thrissur Kerala India CHRONICLE ABSTRACT Article history The corrosion inhibition efficiencies of two novel Schiff bases namely E -3- thiophen-2- Received January 2 2017 ylmethyleneamino benzoic acid T2YMABA and E -4- 5- 2-phenylhydrazono Received in revised form methyl thiophen-2-yl benzoic acid PHMT2YBA on mild steel MS in HCl solution March 1 2017 has been investigated and compared using electrochemical impedance spectroscopy and Accepted April 21 2017 potentiodynamic polarization analysis. The Schiff bases exhibited very good corrosion Available online inhibitions on mild steel in HCl medium and the inhibition efficiency increased with the April 22 2017 increase in concentration of the inhibitor. Polarization studies revealed that T2YMABA acted Keywords as a mixed type inhibitor whereas PHMT2YBA molecules acted as anodic inhibitor. Corrosion inhibitors Mild Steel Schiff base Electrochemical impedance Polarization studies 2017 Growing Science Ltd. All rights reserved. 1. Introduction Nitrogen containing organic compounds exhibit excellent corrosion inhibition characteristics in acid medium. The presence of hetero atoms makes these inhibitors environmental friendly due to high chemical activity and low toxicity 1-3. Despite the large numbers of organic compounds several Schiff bases were considered as good corrosion inhibitors. The presence of C N- group and electronegative N S or O atoms in the molecule give remarkable

• Hoá học
• Novel heterocyclic Schiff bases
• Corrosion inhibition efficiencies
• Potentiodynamic polarization analysis
• Electrochemical impedance spectroscopy
• Quantum mechanical and electrochemical investigations