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      https://www.ias.ac.in/article/fulltext/boms/043/0046

    • Keywords

       

      Mild steel; hydrazide derivative; polarization; impedance; chemisorption; SEM/AFM.

    • Abstract

       

      A novel corrosion inhibitor, namely $N'$-[(4-methyl-1$H$-imidazole-5-yl)methylidene]-2-(naphthalen-2-yloxy) acetohydrazide (IMNH), has been synthesized and characterized by ${}^1$H NMR and FTIR spectroscopic techniques. The anticorrosion behaviour of IMNH on mild steel in 1M hydrochloric acid (HCl) medium was studied by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. The percentage inhibition efficiency of IMNH increased with increase in its concentration and temperature. The adsorption of IMNH followed chemisorption andobeyed Langmuir’s adsorption isotherm. PDP study revealed that IMNH functioned as a mixed type inhibitor. Theoretical study of the adsorption behaviour of this inhibitor was carried out by quantum chemical calculations using density functional theory (DFT). Scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy-dispersive X-ray spectroscopy (EDX) studies confirmed the formation of a protective film of IMNH on the mild steel surface.

    • Author Affiliations

       

      P PREETHI KUMARI1 PRAKASH SHETTY1 SUMA A RAO1 DHANYA SUNIL1 T VISHWANATH2

      1. Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
      2. Department of Materials Science, Mangalore University, Mangalagangotri 574199, India
    • Dates

       
  • Bulletin of Materials Science | News

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