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Paper Details

Influence of Al3+ on Corrosion Inhibition of Trisodium Citrate

N.Vijaya1, A. Peter Pascal Regis2, S. Rajendran3,4, M. Pandiarajan4*

Journal Title:Journal of Chemical, Biological and physical sciences

The inhibition efficiency of trisodium citrate (TSC) in controlling corrosion of carbon steel immersed in well water in the absence of Al3+ has been evaluated by weight loss method. In presence of Al3+ Corrosion inhibition efficiency of TSC increases. A synergistic effect in observed between TSC and Al3+. This effect is more pronounced in presence of 50 ppm of Al3+ than in presence of 25 ppm of Al3+ .This is supported by synergism parameter values. Polarization study reveals that TSC-Al3+ system control the cathodic reaction predominantly. It also indicates that formation of a protective film on a metal surface. The protective film has been analysed by FTIR spectra. FTIR spectra reveal that the protection film consists of Fe2+ - TSC complex, Al3+ -TSC complex and Al (OH) 3.