Corrosion Inhibition by Prussian Blue

The inhibition efficiency (IE) of K3[Fe(CN)6] in controlling corrosion of carbon steel in aqueous solution containing 60 ppm of Cl- in the presence and absence of Zn2+ has been evaluated by weight loss method. The formulation consisting of 100 ppm K3[Fe(CN)6] and 50 ppm Zn2+ offers 98% inhibition ef...

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Bibliographic Details
Main Author: Kalaivani,R. (author)
Other Authors: Narayanaswamy,B. (author), Selvi,J. A. (author), Amalraj,A. J. (author), Jeyasundari,J. (author), Rajendran,S. (author)
Format: article
Language:eng
Published: 2009
Subjects:
corrosion inhibition
carbon steel
Prussian blue
synergistic effect
Online Access:http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042009000200010
Country:Portugal
Oai:oai:scielo:S0872-19042009000200010
Description
Summary:The inhibition efficiency (IE) of K3[Fe(CN)6] in controlling corrosion of carbon steel in aqueous solution containing 60 ppm of Cl- in the presence and absence of Zn2+ has been evaluated by weight loss method. The formulation consisting of 100 ppm K3[Fe(CN)6] and 50 ppm Zn2+ offers 98% inhibition efficiency to carbon steel immersed in aqueous solution containing 60 ppm Cl-. A synergistic effect exists between K3[Fe(CN)6] and Zn2+. As immersion period increases, the inhibition efficiency of K3[Fe(CN)6]─ Zn2+ system decreases. 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 Prussian blue and Zn(OH)2. The film is found to be UV fluorescent.

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