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Journal of the Iranian Chemical Society

, Volume 6, Issue 2, pp 353–363 | Cite as

Carmine and Fast Green as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

  • R. A. Prabhu
  • T. V. Venkatesha
  • A. V. Shanbhag
Article

Abstract

The inhibition action of carmine and fast green dyes on corrosion of mild steel in 0.5 M HCl was investigated using mass loss, polarization and electrochemical impedance (EIS) methods at 300 K. The inhibition efficiency was found to increase with increasing concentration of the inhibitors. The inhibition efficiency of fast green (%η - 98) is higher than that of carmine (%η - 92) and found to be maximum in 1 × 10-3 M solution. The inhibitors act as mixed type with predominant cathodic effect. The inhibitors were adsorbed on the mild steel surface according to the Temkin adsorption isotherm. The surface morphology of the mild steel specimens was evaluated using SEM images.

Keywords

Dyes Carmine Fast green Corrosion inhibition Mild steel Adsorption 

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Copyright information

© Iranian Chemical Society 2009

Authors and Affiliations

  • R. A. Prabhu
    • 1
  • T. V. Venkatesha
    • 2
  • A. V. Shanbhag
    • 3
  1. 1.Department of Chemistry, M.G.C. ArtsCommerce and G.H.D. Science CollegeSiddapur (UK)India
  2. 2.Department of P.G. Studies and Research in ChemistryKuvempu UniversityShankaraghattaIndia
  3. 3.Department of ChemistryS.D.M. CollegeHonavar (UK)India

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