Attenuation of Acid Corrosion of Mild Steel Using a Novel Organic Dye: Electrochemical and Surface Measurements

Rao Yudhistira Rao, Kumari P Preethi Kumari P, Dhanya Sunil, Prakash Shetty, Suma A. Rao

Research output: Contribution to journalArticle


Abstract: The corrosion behavior of mild steel in acid media was studied at different temperatures and over a range of concentrations of a newly synthesized azo dye, namely, 2-((E)-((Z)-(2-hydroxy- 5-((E)phenyldiazenyl) benzylidene) hydrazono) methyl)-4-(phenyldiazenyl)phenol (PBHP). Standard electrochemical methods such as potentiodynamic polarization and electrochemical impedance spectroscopy were employed for the corrosion rate measurements. As per the experimental data, the inhibition efficiency was observed to increase with an increase in the concentrations of PBHP. Potentiodynamic polarization measurements indicate that the studied inhibitor functions as mixed type and followed Langmuir adsorption isotherm. The surface morphology of the mild steel specimen was examined before and after corrosion using scanning electron microscopy and atomic force microscopy.

Original languageEnglish
Pages (from-to)443-454
Number of pages12
JournalSurface Engineering and Applied Electrochemistry
Issue number4
Publication statusPublished - 01-07-2019


All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Industrial and Manufacturing Engineering

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