Corrosion Behaviour of Aluminium in the Presence of an Aqueous Extract of Hibiscus Rosa-sinensis

The inhibition efficiency (IE) of an aqueous extract of Hibiscus rosa-sinensis (white) in controlling corrosion of aluminium at pH 12 has been evaluated by weight loss method in the absence and presence of Zn2+. The formulation consisting of 8 mL flower extract (FE) and 50 ppm of Zn2+ had 98% inhibition efficiency. Polarization study revealed that this formulation functioned as cathodic inhibitor. AC impedance spectra revealed the presence of a protective film formed on the metal surface. FTIR spectra revealed that the protective film consisted of a complex formed between the active principle of the flower extract and Al3+.

Bibliographic Details

Main Authors:	Rajendran,S., Jeyasundari,J., Usha,P., Selvi,J. A., Narayanasamy,B., Regis,A. P. P., Rengan,P.
Format:	Digital revista
Language:	English
Published:	Sociedade Portuguesa de Electroquímica 2009
Online Access:	http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042009000200008
Tags:	Add Tag No Tags, Be the first to tag this record!