Journal
CORROSION SCIENCE
Volume 56, Issue -, Pages 176-183Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.12.005
Keywords
Mild steel; Modeling studies; Acid inhibition
Funding
- Universiti Kebangsaan Malaysia [UKM-GUP-2011-035]
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The abilities of phthalazine derivatives, including phthalazine (PT), phthalazone (PTO) and phthalhydrazide (PTD), to inhibit the corrosion of mild steel in 1 M HCl at 30 degrees C were studied using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. Theoretical calculations were performed to investigate the electronic structures of the PT derivatives. Our results showed that the inhibition efficiencies of these derivatives improved with increases in concentration. The data also showed that PTD < PT < PTO in terms of the inhibiting efficiency. Theoretical calculations also revealed that PTO is expected to be the best inhibitor among the studied phthalazine derivatives. (C) 2011 Elsevier Ltd. All rights reserved.
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