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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(3) [May 2010] >
| Title: | Inhibition effect of amino acid derivatives on the corrosion of brass in 0.6 M aqueous sodium chloride solution |
| Authors: | Ranjana
Banerjee, Ranu
Nandi, M M |
| Keywords: | Corrosion inhibition
Brass
Polarization
Impedance
Amino acids |
| Issue Date: | May-2010 |
| Publisher: | CSIR |
| Abstract: | The inhibitive effects of three amino acids
and their benzenesulphonyl derivatives against the corrosion of brass in
0.6 M aqueous sodium chloride solution have been studied using potentiodynamic
polarization and electrochemical impedance spectroscopy. The amino acids used
are glycine (I), L (-) aspartic acid (II) and L (-) glutamic acid (III) and
their corresponding benzenesulphonyl derivatives IV, V and VI. The
inhibition efficiency of these compounds increases in the order I< II <
III for amino acids and the same trend is followed for benzenesulphonyl
derivatives. Compound VI is found to be the best inhibitor. The inhibition
efficiency of VI with 4 ×10-5 M concentration is the highest, which
reaches 81.2- 85.5%. It has been observed that introduction of C6H5-SO2-
group increases the inhibition efficiency of the amino acids by 14-33% due to
(a) higher molecular size (b)  - electron contribution of the benzene ring and
(c) presence of more active adsorption sites. |
| Page(s): | 176-180 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(3) [May 2010]
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