1999 polarization, electrode processes, photoelectrochemistry

polarization, electrode processes, photoelectrochemistryF 5000

07 - 015Aluminum and Aluminum Alloy Dissolution in Concentrated Phos-phoric Acid. — The electrochemical behavior and surface-finish of Al andAl alloys (3003 and 6063) in conc. H3PO4 is similar. Under all conditions alarge limiting current plateau is measured, but the limiting current density onlyfollows a Levich behavior at high temperatures. The surface varies from matteat low temp. to polished at high temp. with a transition near 65 ◦C. Theimpedance, polarization, and Arrhenius behavior of the system is comparedwith that found for Fe and Cu dissolution in conc. H3PO4 — (VIDAL,ROBERTO; WEST, ALAN C.; J. Electrochem. Soc. 145 (1998) 12, 4067-4073;AMTX-Xerox Corp., Canandaigua, NY 14424, USA; EN)

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