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Inhibitive Effect of N, N-bis (2-chloroethylaminobenzaldehyde) Ethylthiosemicarbazone on the Corrosion of Mild Steel in 1N H2SO4


Affiliations
1 Department of Chemistry, RMK College of Engineering and Technology, Chennai – 601 206, Tamil Nadu, India
2 Department of Chemistry, Sathyabama University, Chennai - 600 119, Tamil Nadu, India
 

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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  • Inhibitive Effect of N, N-bis (2-chloroethylaminobenzaldehyde) Ethylthiosemicarbazone on the Corrosion of Mild Steel in 1N H2SO4

Abstract Views: 487  |  PDF Views: 117

Authors

T. S. Franklin Rajesh
Department of Chemistry, RMK College of Engineering and Technology, Chennai – 601 206, Tamil Nadu, India
A. Sheik Mideen
Department of Chemistry, Sathyabama University, Chennai - 600 119, Tamil Nadu, India
J. Karthikeyan
Department of Chemistry, Sathyabama University, Chennai - 600 119, Tamil Nadu, India
S. Anitha
Department of Chemistry, Sathyabama University, Chennai - 600 119, Tamil Nadu, India

Abstract


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

References





DOI: https://doi.org/10.17485/ijst%2F2012%2Fv5i6%2F30468