Inhibitive Effects by Some Benzothiazole Derivatives on Mild Steel Corrosion in 1 N HCl

The inhibition effect of some Benzothiazole derivatives 1,3-benzothiazol-2-amine (BTA), 6-methyl- 1,3-benzothiazol-2-amine (MBTA) and 2-amino-1,3-benzthiazole-6-thiol (TBTA) against mild steel corrosion in 1 N HCl solutions were evaluated using conventional weight loss, potentiodynamic polarization,...

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Bibliographic Details
Published in:International journal of electrochemical science 2014-07, Vol.9 (7), p.3951-3960
Main Authors: Patel, N.S., Beranek, P., Nebyla, M., Pribyl, M., Snita, D.
Format: Article
Language:English
Subjects:
Benzothiazole derivatives
corrosion inhibition
electrochemical impedance spectroscopy
electrochemical polarization
mild steel
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Summary:The inhibition effect of some Benzothiazole derivatives 1,3-benzothiazol-2-amine (BTA), 6-methyl- 1,3-benzothiazol-2-amine (MBTA) and 2-amino-1,3-benzthiazole-6-thiol (TBTA) against mild steel corrosion in 1 N HCl solutions were evaluated using conventional weight loss, potentiodynamic polarization, linear polarization and electrochemical impedance spectroscopy. The weight loss results showed that all the three organic compounds are excellent corrosion inhibitors, electrochemical polarizations data discovered the mixed mode of inhibition and the results of electrochemical impedance spectroscopy have shown that the change in the impedance parameters, charge transfer resistance and double layer capacitance, with the change in concentration of the inhibitors employed is due to the adsorption of the molecule leading to the formation of a protective layer on the surface of mild steel. The inhibition efficiencies increased with increase in concentration followed the order of TBTA > MBTA > BTA.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)08063-X