%0 Journal Article
%T The effect of Zn2+ ion in promoting inhibitive property of phenolphthalein
%A J. Sathiyabama
%A S. Rajendran
%A J. Jeyasundari
%A B. Shyamaladevi
%J Journal of Engineering Science and Technology Review
%D 2010
%I Kavala Institute of Technology
%X The inhibition efficiency of phenolphthalein in controlling corrosion of carbon steel immersed in well water has been evaluatedby mass loss method both in absence and presence of zinc ion. A synergistic effect exists between phenolphthalein (PN)and Zn2+. The inhibition efficiency (IE) of the PN ¨C Zn2+ system decreases with increase in immersion period. Addition ofN-Cetyl-N, N, N-Trimethylammlonium bromide (CTAB) sodium dodecyl sulphate (SDS), sodium sulphite (Na2SO3) doesnot change the excellent inhibition efficiency of the PN-Zn2+ system. Polarization study suggests that the Pn-Zn2+ systemfunctions as a mixed inhibitor system. AC impedance spectra reveal the presence of a protective film on the metal surface.FTIR spectra indicate that the protective film consists of Fe2+-PN complex and Zn(OH)2.
%K Carbon steel
%K corrosion inhibition
%K phenolphthalein
%K dyes and synergistic effect
%U http://www.jestr.org/downloads/volume3/fulltext072010.pdf