Journal
CORROSION SCIENCE
Volume 45, Issue 12, Pages 2905-2913Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0010-938X(03)00116-1
Keywords
aluminium; anodizing; alloy; tungsten; ionic transport; marker
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The ionic transport numbers in barrier anodic films, formed on an Al-5.7at.%W alloy in 0.1 M sodium tungstate electrolyte at 293 K, have been measured for current densities from 0.1 to 1000 mA cm(-2). For this purpose, a xenon marker was ion implanted with a fluence of 1.5 x 10(15) ions cm(-2) into a film formed to 10 V on the alloy, which was then further anodized to 150 V. The position of the marker layer in the final film was determined by transmission electron microscopy and Rutherford backscattering spectroscopy. The cation transport number was similar to0.38, with no dependence upon current density to an accuracy of similar to10%. (C) 2003 Elsevier Ltd. All rights reserved.
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