Record Details

AC impedance study on the activation mechanism of aluminium by indium and zinc in 3.5% NaCl medium

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title AC impedance study on the activation mechanism of aluminium by indium and zinc in 3.5% NaCl medium
 
Creator VENUGOPAL, A
RAJA, VS
 
Subject passive films
behavior
alloys
aluminium
zinc
eis
sem
 
Description Activation of aluminium by In3+ and Zn2+ ions in chloride media has been investigated by using potentiodynamic polarisation, potential vs. time measurements, electrochemical impedance spectroscopy and scanning electron microscopy studies. It is suggested that indium exhibits In+ and In2+ intermediates during the dissolution and redeposition processes. Incorporation of any of these lower valent ions changes the defect structure of the passive film, leading to an increase in anionic vacancies and a decrease in the number of electrons, promoting active dissolution of aluminium. The role of zinc is to moderate localised attack by increasing the electron concentration and cation mobility, thereby lowering the corrosion rate at activated sites. (C) 1997 .
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-23T10:43:50Z
2011-12-26T12:56:25Z
2011-12-27T05:45:08Z
2011-08-23T10:43:50Z
2011-12-26T12:56:25Z
2011-12-27T05:45:08Z
1997
 
Type Article
 
Identifier CORROSION SCIENCE, 39(12), 2053-2065
0010-938X
http://dx.doi.org/10.1016/S0010-938X(97)00082-6
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10492
http://hdl.handle.net/10054/10492
 
Language en