Inhibition of Corrosion of Carbon Steel in Well Water by DL-Phenylalanine-Zn2+System | Zendy

A. Sahaya Raja | Zendy; S. Rajendran | Zendy; P. Satyabama | Zendy

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Inhibition of Corrosion of Carbon Steel in Well Water by DL-Phenylalanine-Zn²⁺System

Author(s) -

A. Sahaya Raja,

S. Rajendran,

P. Satyabama

Publication year - 2012

Publication title -

journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.436

H-Index - 50

eISSN - 2090-9063

pISSN - 2090-9071

DOI - 10.1155/2013/720965

Subject(s) - chemistry , phenylalanine , corrosion , electrochemistry , polarization (electrochemistry) , metal , carbon steel , nuclear chemistry , anode , inorganic chemistry , metallurgy , organic chemistry , biochemistry , electrode , amino acid , materials science

The environmental friendly inhibitor system DL-phenylalanine-Zn 2+ has been investigated by weight loss method. A synergistic effect exists between DL-phenylalanine and Zn 2+ system. The formulation consisting of 150 ppm of DL-phenylalanine and 5 ppm of Zn 2+ offers good inhibition efficiency of 90%. Polarization study reveals that this formulation functions as a anodic inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. The surface morphology has been analysed by SEM and EDAX. A suitable mechanism of corrosion inhibition is proposed based on the results obtained from weight loss study and electrochemical studies.

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