Inhibition of corrosion of mild steel in acidic solutions by quarternary salts of pyridinium bases

Inhibition of corrosion of mild steel in acidic solutions by quarternary salts of pyridinium bases The influence of pyridinium chloride (PC) and n‐hexa decyl pyridinium chloride (HDPC) on the corrosion of mild steel in 5N HCl and 5N H 2 SO 4 has been studied using techniques such as weight loss and gasometric measurements, potentiodynamic polarisation studies, linear polarisation studies and small amplitude cyclic voltametric studies. It is found that HDPC is more inhibitive than PC and both the compounds perform better in H 2 SO 4 . Polarisation studies reveal that PC behaves as an anodic inhibitor in H 2 SO 4 and as a mixed inhibitor in HCl. Measurements of values of polarisation resistance (R p ) and double layer capacitance (C dl ) in the presence of these compounds also reveal the better performance of HDPC in both the acids. The adsorption of PC and HDPC on a mild steel surface from both the acids is found to obey Temkin’s adsorption isotherm. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

Inhibition of corrosion of mild steel in acidic solutions by quarternary salts of pyridinium bases

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Publisher
Emerald Publishing
Copyright
Copyright © 1998 MCB UP Ltd. All rights reserved.
ISSN
0003-5599
DOI
10.1108/00035599810198769
Publisher site
See Article on Publisher Site

Abstract

The influence of pyridinium chloride (PC) and n‐hexa decyl pyridinium chloride (HDPC) on the corrosion of mild steel in 5N HCl and 5N H 2 SO 4 has been studied using techniques such as weight loss and gasometric measurements, potentiodynamic polarisation studies, linear polarisation studies and small amplitude cyclic voltametric studies. It is found that HDPC is more inhibitive than PC and both the compounds perform better in H 2 SO 4 . Polarisation studies reveal that PC behaves as an anodic inhibitor in H 2 SO 4 and as a mixed inhibitor in HCl. Measurements of values of polarisation resistance (R p ) and double layer capacitance (C dl ) in the presence of these compounds also reveal the better performance of HDPC in both the acids. The adsorption of PC and HDPC on a mild steel surface from both the acids is found to obey Temkin’s adsorption isotherm.

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Apr 1, 1998

Keywords: Acid; Corrosion; Steel

References

  • Influence of n‐hexadecyl benzyl dimethyl ammonium chloride on the corrosion of mild steel in acids
    Vasudevan, T.; Muralidharan, S.; Alwarappan, S.; Iyer, S.V.K.

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