Abstract

The inhibitive effect of Tryptophan- Zn2+ system in controlling the corrosion of carbon steel in sea water was investigated by weight loss
method. Results of weight loss method indicated inhibition efficiency increased with increasing the inhibitor concentration. 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 FTIR and AFM analysis.

Key words: Corrosion inhibition, amino acids, carbon steel, tryptophan, FTIR, AFM