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Asafoetida Extract (ASF) as green Corrosion Inhibitor for Mild Steel in Sea Water

Author Affiliations

  • 1Department of Chemistry, GTN Arts College, Dindigul Tamil Nadu, INDIA
  • 2 Department of Chemistry, APA College for Arts and Culture Palani, INDIA
  • 3 Department of Chemistry, RVS School of engineering and Technology, Dindigul, Tamil Nadu, INDIA

Int. Res. J. Environment Sci., Volume 1, Issue (5), Pages 14-21, December,22 (2012)


An aqueous extract of asafoetida has been used as a corrosion inhibitor in controlling corrosion of carbon steel. The main constituent of this extract is umbelliferone. It has excellent inhibition efficiency (IE) of 98% at Zn2+ (25 ppm) by the weight loss method. The protective film has been analyzed using Atomic Force Microscopic (AFM) and FTIR spectroscopic techniques. Protective film formed on the metal surface is confirmed by using Electro chemical studies such as potentiodynamic polarization technique. Polarization study reveals that this system functions as mixed type of inhibitor.


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