Indian Journal of Science and Technology
DOI: 10.17485/ijst/2012/v5i6.10
Year: 2012, Volume: 5, Issue: 6, Pages: 1-6
Original Article
T.S. Franklin Rajesh1 , A. Sheik Mideen2 , J. Karthikeyan2 and S. Anitha2
1Department of Chemistry, RMK College of Engineering and Technology,
2Department of Chemistry, Sathyabama University, [email protected]
The inhibitive effect of N, N-Bis (2-Chloroethylaminobenzaldehyde) ethylthiosemicarbazone (BCETSC) on the corrosion of mild steel in 1N H2SO4 was investigated by weight loss method, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results showed that the inhibition efficiency increases with increase in concentration of the inhibitor. The potentiodynamic polarization curves revealed that BCETSC is a mixed type inhibitor in 1N H2SO4. EIS plots indicated that the addition of BCETSC increases the charge-transfer resistance of the corrosion process, and hence the inhibition performance. Scanning electron microscope (SEM) showed that the inhibition occurs due to adsorption of BCETSC molecules at the metal/solution interface. The free energy change value indicated that adsorption of BCETSC molecule is a spontaneous process and it adsorbs physically on mild steel surface.
Keywords: Mild steel, Corrosion inhibition, N, N-Bis (2-Chloroethylaminobenzaldehyde) ethylthiosemicarbazone
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