Experimental Investigation of Isatin Schiff base as Corrosion Inhibitor for Carbon Steel in 1MHCl

Authors

  • Anjoo Bala  Department of Chemistry, M. D. University, Rohtak, Haryana, India
  • Vikas  Department of Chemistry, M. D. University, Rohtak, Haryana, India
  • Gobind Goyat  Department of Chemistry, M. D. University, Rohtak, Haryana, India
  • Suresh Kumar  Department of Chemistry, M. D. University, Rohtak, Haryana, India
  • Hari Om  Department of Chemistry, M. D. University, Rohtak, Haryana, India

Keywords:

Carbon Steel, HCl, Corrosion Inhibitor, Electrochemical Impedance, Adsorption Isotherm.

Abstract

The inhibition efficiency of Isatin(1-H-indol-2,3-dione) 2-aminothiophenol (H2IATP) Schiff base as a corrosion inhibitor for carbon steel in 1M HCl solution was investigated by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Weight loss measurements were done by taking different immersion time for various concentrations (50-300ppm) of inhibitor at temperature of 298K. The observed results showed increase in inhibition efficiency (IE %), surface coverage (?) but decrease in corrosion rate (CR) with increase in the concentrations of the inhibitor. Inhibitor found to exhibit maximum inhibition efficiency of 97.35% at an optimum concentration of 250ppm for 24hrs of immersion time. Langmuir adsorption isotherm was obeyed by the inhibitor. Thermodynamic parameters regulating the adsorption process were calculated and adsorption depicted to be physical in nature. Polarization measurements data confirms the inhibitor as mixed type in nature. EIS data revealed the dependence of corrosion process on charge transfer process.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2018-02-28

Issue

Volume 4, Issue 1, January-February-2018

Section

Research Articles

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How to Cite

[1]
Anjoo Bala, Vikas, Gobind Goyat, Suresh Kumar, Hari Om, " Experimental Investigation of Isatin Schiff base as Corrosion Inhibitor for Carbon Steel in 1MHCl, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 4, Issue 1, pp.744-754, January-February-2018.