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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.16 [2009] >
IJCT Vol.16(4) [July 2009] >
| Title: | Corrosion inhibition and biocidal activity of a cationic surfactant |
| Authors: | Shanthy, P
Rengan, P
Chelvan, A Thamarai
Rathika, K
Rajendran, S |
| Keywords: | Corrosion inhibition
Carbon steel
Biocidal activity
N-Cetyl-N,N,N-trimethyl ammonium bromide (CTAB)
CTAB-Zn2+ system |
| Issue Date: | Jul-2009 |
| Publisher: | CSIR |
| Abstract: | The inhibition efficiency (IE) of CTAB - Zn2+ system in controlling corrosion of carbon steel in well water has been evaluated by weight loss method. Enumeration of microorganisms from well water and biocidal efficiency of inhibitor system (CTAB-Zn2+) were also determined by serial dilution technique and spread plate method. The formulation consisting of 200 ppm of CTAB and 5 ppm of Zn2+ shows an IE of 98%. Potentiodynamic polarization curves indicate that the CTAB – Zn2+ system functions as anodic inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra suggest that the protective film consists of Fe2+- CTAB complex and Zn(OH)2. The optimum concentration of CTAB for destroying the bacterias viz. E.coli, Salmonella and Shigella is ³ 25 ppm. At ³ 25 ppm of CTAB, it shows 100% biocidal efficiency in well water containing 5 ppm of Zn2+. |
| Page(s): | 328-333 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.16(4) [July 2009]
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