Experimental and theoretical investigation of 3-amino-1,2,4-triazole-5-thiol as a corrosion inhibitor for carbon steel in HCl medium

Mert B. D., Mert M. E., KARDAŞ G., Yazici B.

CORROSION SCIENCE, vol.53, no.12, pp.4265-4272, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 12
  • Publication Date: 2011
  • Doi Number: 10.1016/j.corsci.2011.08.038
  • Journal Name: CORROSION SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4265-4272
  • Keywords: Steel, EIS, Electrochemical calculation, Acid corrosion, HYDROCHLORIC-ACID SOLUTION, SCHIFF-BASE COMPOUNDS, MILD-STEEL, TRIAZOLE DERIVATIVES, ALUMINUM-ALLOY, IMPEDANCE SPECTROSCOPY, SULFURIC-ACID, ADSORPTION, H2SO4, EFFICIENCY
  • Çukurova University Affiliated: Yes

Abstract

The inhibition effect of 3-amino-1,2,4-triazole-5-thiol (3ATA5T) was investigated in 0.5 M HCl on carbon steel (CS) by electrochemical impedance spectroscopy and potentiodynamic measurements at various concentrations and temperatures. Results showed that the correlation between experimental (inhibition efficiencies. Delta G(ads), E-a) and quantum calculation parameters (dipole moment, E-HOMO, E-LUMO). The high inhibition efficiency was declined in terms of strongly adsorption of protonated inhibitor molecules on the metal surface and forming a protective film. (C) 2011 Elsevier Ltd. All rights reserved.