Quantum chemical studies on the some inorganic corrosion inhibitors

SAYIN K., KARAKAŞ D.

CORROSION SCIENCE, vol.77, pp.37-45, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 77
  • Publication Date: 2013
  • Doi Number: 10.1016/j.corsci.2013.07.023
  • Journal Name: CORROSION SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.37-45
  • Keywords: Modeling studies, Oxide coating, Oxidation, MILD-STEEL, PITTING CORROSION, CARBON-STEEL, DERIVATIVES, MOLYBDATE, SURFACE, PASSIVATION, NITRATE, SALTS, IRON
  • Sivas Cumhuriyet University Affiliated: Yes

Abstract

Some quantum chemical parameters were calculated by using Hartree-Fock (HF) approximation, Density Functional Theory (DFT/B3LYP) and Moller Plesset perturbation theory (MP3) methods at LANL2DZ, LANL2MB and SOD levels in gas phase and water for dichromate (Cr2O72-), chromate (CrO42-), tungstate (WO42-), molybdate (MoO42-), nitrite (NO2-) and nitrate (NO3-) which are used as inorganic corrosion inhibitors. All theoretical results and experimental inhibition efficiencies of inhibitors were subjected to correlation analyses. In a summary, MP3/SDD level in water was found as the best level. In this level, the inhibition efficiency ranking was found as CrO42- > WO42- > MoO42- > Cr2O72- > NO2- approximate to NO3-. (C) 2013 Elsevier Ltd. All rights reserved.