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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Detalhes bibliográficos
Autor principal: Kalaivani,R. (author)
Outros Autores: Narayanaswamy,B. (author), Selvi,J. A. (author), Amalraj,A. J. (author), Jeyasundari,J. (author), Rajendran,S. (author)
Formato: article
Idioma:eng
Publicado em: 2009
Assuntos:
corrosion inhibition
carbon steel
Prussian blue
synergistic effect
Texto completo:http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042009000200010
País:Portugal
Oai:oai:scielo:S0872-19042009000200010
Descrição
Resumo: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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