A novel thiophene Schiff base as an efficient corrosion inhibitor for mild steel in 1.0 M HCl: Electrochemical and quantum chemical studies

Tezcan F., Yerlikaya G., Mahmood A., KARDAŞ G.

JOURNAL OF MOLECULAR LIQUIDS, vol.269, pp.398-406, 2018 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 269
  • Publication Date: 2018
  • Doi Number: 10.1016/j.molliq.2018.08.025
  • Journal Name: JOURNAL OF MOLECULAR LIQUIDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.398-406
  • Keywords: Mild steel, Schiff base, EIS, Polarization, ICP-OES, DFT, HYDROCHLORIC-ACID SOLUTION, CARBON-STEEL, THEORETICAL EVALUATION, CHLORIDE SOLUTION, ORGANIC-COMPOUNDS, DERIVATIVES, MEDIA, ADSORPTION, POLARIZATION, PERFORMANCE
  • Çukurova University Affiliated: Yes

Abstract

This study presents the synthesis, structural characterization, and inhibition efficiency of a new sulphur containing Schiff base (4-((thiophene-2-ylmethylene)amino)benzamide) (4-TAB) on mild steel in 1.0 M HCl solution. The inhibition efficiency of the 4-TAB is analysed by using electrochemical analysis, solution assay analysis, and theoretical calculation. Electrochemical impedance spectroscopy and linear polarization resistance results show the highest inhibitor efficiency of 96.8% and 96.5%. respectively. The potentiodynamic polarization measurements indicate a decreasing corrosion rate from 9.104 to 0.481 mm year(-1) by addition of 4-TAB. Theoretical calculations are performed using the density functional theory to further confirm and compare our experimental results. (C) 2018 Elsevier B.V. All rights reserved.