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Corrosion Inhibition of Carbon steel by Succinic acid-Zn2+ system

Author Affiliations

  • 1Department of Chemistry, Chettinad College of Engineering and Technology, Karur 639 114, Tamil Nadu, INDIA
  • 2 Corrosion Research Centre, PG and Research Dept. of Chemistry, GTN Arts College, Dindigul 624 005, Tamil Nadu, INDIA
  • 3Department of Chemistry, RVS School of Engineering and Technology, Dindigul 624 005, Tamil Nadu, INDIA

Res.J.chem.sci., Volume 1, Issue (8), Pages 42-48, November,18 (2011)


The inhibition efficiency (IE) of succinic acid (SA) in controlling corrosion of carbon steel in sea water in the absence and presence of Zn2+ has been evaluated by weight loss method. The formulation consisting of 250 ppm SA and 50 ppm Zn2+ has 93% IE. It is found that the inhibition efficiency (IE) of SA increases by the addition of Zn2+ ion. A synergistic effect exists between SA and Zn2+. Polarization study reveals that SA Zn2+ system controls the cathodic reaction predominantly. FTIR spectra reveal that the protective film consists of Fe2+ SA complex and Zn(OH). The surface morphology of the protective film on the metal surface was characterized by scanning electron microscopy (SEM) study. A suitable mechanism for corrosion inhibition is proposed based on the results from the above studies.


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