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STUDIA CHEMIA - Issue no. 1 / 2010 | |||||||
Article: |
INVESTIGATION OF AZ91 MAGNESIUM ALLOY OXIDATION KINETICS BY MEANS OF ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY. Authors: VALENTINA TASOTI, ADRIAN NICOARǍ, PAUL ŞERBAN AGACHI. |
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Abstract: A magnesium alloy oxidation in alkaline solutions was investigated by electrochemical impedance spectroscopy. Recorded impedance spectra exhibited up to two capacitive loops, suggesting oxidation trough adsorbed intermediates. For a kinetic description of reaction mechanism, equation of the parameters of Voight-type electrical equivalent model were obtained and used for magnesium alloy oxidation in open circuit conditions.
Keywords: Microarc oxidation, magnesium alloy, electrochemical impedance spectroscopy, kinetic mechanism |
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