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Paper Details

Tryptophan as Corrosion Inhibitor for Carbon Steel in Sea Water

S. Gowri 1*, J. Sathiyabama 1, S. Rajendran1, 2 and J. Angelin Thangakani 3

Journal Title:Journal of Chemical, Biological and physical sciences

The inhibition efficiency of Tryptophan- Zn2+ system in controlling corrosion of carbon steel in sea water has been evaluated by weight loss and Poteniodyanamic polarization methods. The combined corrosion inhibition efficiency offered by 250 ppm of Tryptophan and 20ppm of Zn2+ was 79%. Results of weight loss method indicated inhibition efficiency increased with increasing inhibitor concentration. A synergistic effect exists between Tryptophan- Zn2+. The corrosion inhibition was observed due to the formation of more stable and compact protective film on the metal surface. The surface morphology of the protective film on the metal surface was analyzed by Scanning Electron Microscopy.