The inhibition efficiency (IE) of an aqueous extract of beet root (BR) in controlling corrosion of carbon steel in well water in the absence and presence of Zn 2+ has been evaluated by mass loss method. The formulation consisting of 4 mL of BR extract and 50 ppm Zn 2+ offers 98% inhibition efficiency to carbon steel immersed in well water. A synergistic effect exists between BR extract and Zn 2+. Addition of N-Cetyl-N,N,N-trimethylammonium bromide (CTAB) does not change the excellent inhibition efficiency of the BR-Zn 2+ system. The BR-Zn 2+ system shows excellent IE up to 7 days. Polarization study reveals that this formulation controls the cathodic reaction predominantly. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Fe 2+-betanin complex and Zn(OH) 2. The film is found to be UV-fluorescent.
CITATION STYLE
Selvi, J. A., Rajendran, S., Sri, V. G., Amalraj, A. J., & Narayanasamy, B. (2009). Corrosion Inhibition by Beet Root Extract. Portugaliae Electrochimica Acta, 27(1), 1–11. https://doi.org/10.4152/pea.200901001
Mendeley helps you to discover research relevant for your work.