Schiff bases as corrosion inhibitor for aluminium in HCl solution

Safak S., DURAN B., YURT ŞEN A., Turkoglu G.

CORROSION SCIENCE, vol.54, pp.251-259, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54
  • Publication Date: 2012
  • Doi Number: 10.1016/j.corsci.2011.09.026
  • Journal Name: CORROSION SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.251-259
  • Keywords: Aluminium, EIS, Polarisation, Acid corrosion, HYDROCHLORIC-ACID SOLUTION, MILD-STEEL CORROSION, CHLORIDE SOLUTION, AQUEOUS-SOLUTIONS, IODIDE-IONS, DERIVATIVES, ADSORPTION, PARAMETERS, BEHAVIOR, H2SO4
  • Anadolu University Affiliated: Yes

Abstract

Three Schiff bases named 1,5-bis[2-(2-hydroxybenzylideneamino)phenoxy]-3-oxopentane (D1), 1,5-bis[2-(5-chloro-2-hydroxybenzylideneamino)phenoxy]-3-oxopentane (D2) and 1,5-bis[2-(5-bromo-2-hydroxybenzylideneamino)phenoxy]-3-oxopentane (D3) were synthesized and their inhibitive capabilities on the aluminium corrosion in 0.1 M HCl were investigated by means of electrochemical impedance spectroscopy, Tafel polarisation and scanning electron microscopy techniques. Results showed that, compounds under study exhibit inhibitor properties and adsorption of these compounds was found to accord with Temkin adsorption isotherm. Polarisation curves indicated that the studied Schiff bases were cathodic inhibitor and the effectiveness of these inhibitors decreased in the order of D3 > D2 > D1. Quantum chemical calculations were performed to provide further insight into the inhibition efficiencies determined experimentally. (C) 2011 Elsevier Ltd. All rights reserved.