Repassivation Studies of Aluminum Using a Rotating Strip Electrode Page: 1 of 8
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BNL-66786
Repassivation Studies of Aluminum using a Rotating Strip Electrode
g
Antonio J. Aldykiewicz, Jr. and Hugh S. Isaacs'
Department of Chemical Engineering
University of Connecticut .
Storrs, Connecticut 06269
'Deparnment ofApplied Science
Brookhaven National Laboratory
Upton, New York 11973
Introduction
Several approaches have been used to study the repassivation of oxide free
surfaces. Beck used a breaking tensile specimen to study the repassivation of titanium in
3M HCi.' Newman used a Satciwg technique to study the effect of molybdenum on the
repassivation of stainless steel in HCL2 Burstein and Marshall studied the repassivation of
304L stainless steel in iM KOH using the action of a stylus on a rotating disk electrode.'
Cinderey and Burstein demonstrated the use of small guillotine to remove the oxide film of
aluminum in neutral aqueous environments.' Frankel and coworkers developed a thin film
breaking electrode technique to study the repassivation of aluminum in 0.6M potassium
sulfate on a sub microsecond time scale.
The disadvantage of these approaches is that the repassivation event is a singular
one since the electrodes are destroyed in the process of exposing bare metal. In this study
a novel approach, a strip micro-electrode mounted in a rotating cylinder, is being used to
study the repassivation of aluminum in aqueous environments. The advantage of this
technique is that a series of repassivation events can be studied since fresh metal is
exposed with each rotation of the cylinder. The other distinction is that the time between
repassivation events can be varied by changing the rotation speed. The disadvantage is
that the time required to expose fresh metal is not as short as the breaking electrode
approach used by Frankel and coworkers.' In the later work, the time required to expose
fresh metal was on the order of a few microseconds. The time required to expose fresh
Electrochemical Society Proceedings Volume 97-26 510
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Aldykiewicz, A. J., (Jr.) & Isaacs, H. S. Repassivation Studies of Aluminum Using a Rotating Strip Electrode, article, September 1, 1977; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc708110/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.