Abstract
Metallic magnesium is chemically corroded by the mixture at 80°C, with the formation of a passivating microporous magnesium fluoride layer as revealed by electron scanning micrograph and cyclic voltammetry. A more compact layer can be obtained electrochemically. The corrosion mechanism has been studied by ac impedance measurements. The reaction pathway involves oxidation, desorption, diffusion, and precipitation steps. Kinetic parameters (charge and mass transfer) have been determined by a computerized simulation method.
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