Journal
CORROSION SCIENCE
Volume 53, Issue 10, Pages 3058-3067Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.05.009
Keywords
Mild steel; EIS; Polarization; Acid inhibition
Funding
- Ferdowsi University of Mashhad provision of laboratory
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Inhibitive performance of some synthesized thiophenol derivatives on corrosion behavior of mild steel in 0.1 M HCl solution was investigated by means of electrochemical techniques, quantum chemical and optical microscopy. The increase in concentration and immersion time shows a positive effect on inhibition efficiency while temperature has a negative effect. Inhibitor molecules directly adsorb at surface on the basis of donor-acceptor interactions between the it-electrons of benzene, sulfur and nitrogen atoms and the vacant d-orbitals of iron atoms. According to the thermodynamic parameters, present inhibitors adsorb physically. Optical microscopy examinations demonstrate a decrease in corrosion attacks in presence of inhibitors. (C) 2011 Elsevier Ltd. All rights reserved.
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