Spectroscopic methods used for analyzing protective film formed by L-Histidine on carbon steel

Authors

  • S.Sivakumar PG and Research Department of Chemistry, GTN Arts College, Dindigul – 624005, Tamil Nadu, India
  • A.Sahaya Raja PG and Research Department of Chemistry, GTN Arts College, Dindigul – 624005, Tamil Nadu, India
  • J.Sathiyabama PG and Research Department of Chemistry, GTN Arts College, Dindigul – 624005, Tamil Nadu, India
  • V.Prathipa Department of Chemistry, P.S.N.A. College of Engineering &Technology, Dindigul, Tamil Nadu, India

Keywords:

L-Histidine, Synergistic effect, FTIR, SEM,EDAX

Abstract

The corrosion inhibition of carbon steel (CS) using the “green” inhibitor, L-Histidine (L-His) was investigated. This study
was conducted at pH 7.8. The effect caused by Zn2+ additive also was investigated. The study was done over a range of concentrations. Gravimetric method and electrochemical methods were applied. It was found that the L-Histidine acts as a good inhibitor at pH 7.8. The inhibition efficiency increases with increasing L-His concentration. The addition of Zn2+ to L-Histidine significantly increased the inhibition efficiency. Tafel results indicated that decrease the corrosion current (Icorr) value. The influence of biocide SDS on the inhibition efficiency of L-Histidine – Zn2+ system has been investigated. Also it is evident that at minimum concentration of biocides added to the inhibitor system, 100 % biocidal efficiency is noticed. The protective film formed on the metal surface has been analyzed by FT-IR, SEM and EDAX spectra. It is found that the protective film consists of Fe2+ - L-Histidine complex and Zn(OH)2.

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Published

2014-07-31
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How to Cite

S.Sivakumar, A.Sahaya Raja, J.Sathiyabama, and V.Prathipa. “Spectroscopic Methods Used for Analyzing Protective Film Formed by L-Histidine on Carbon Steel”. International Journal of Pharmaceutics and Drug Analysis, vol. 2, no. 7, July 2014, pp. 601-1, https://www.ijpda.com/index.php/journal/article/view/86.

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Research Articles
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