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  • Chem Sci Trans., 2013, 2(S1),  pp S123-S128  

    DOI:10.7598/cst2013.489

    Research Article

    Curcumin Dye as Corrosion Inhibitor for Carbon Steel in Sea Water

  • V. JOHNSIRANI, J. SATHIYABAMA, S. RAJENDRANb and R. NAGALAKSHMI
  • P. G and Research Department of Chemistry, GTN Arts College, Dindigul-624005, Tamilnadu, India
    Department of Chemistry, RVS School of Engineering and Technology, Dindigul-624005, Tamilnadu, India
    Department of Chemistry, Arupadaiveedu Institute of Technology, Chennai, Tamilnadu, India
  • Abstract

    The inhibition efficiency (IE) of an aqueous extract of the(Curcuma longa L.) plant material rhizome powder has been used as a corrosion inhibitor in controlling corrosion of carbon steel in sea water, by the weight-loss study, in the absence and presence of Zn2+. The main constituent of this plant extract is curcumin. The results show that 93% IE is provided by binary system consisting of 10 mL of curcumin dye (CD) and 50 ppm of Zn2+. Polarization study reveals that CD and Zn2+ system functions as mixed type inhibitor. The nature of the protective film formed on metal surface has been analysed by FTIR spectra.

    Keywords

    Corrosion inhibition, Curcumin, Seawater, FTIR

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