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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.
 
       
         
  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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