|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Voltammetric Studies of Extruded Pure Magnesium in Different Electrolytes and Its Corrosion Morphology
||Petra Maier, Leon Gentzsch, Norbert Hort
|On-Site Speaker (Planned)
This study concerns the voltammetric behavior in different electrolytes of pure Magnesium processed by direct extrusion. The recrystallized microstructure is fine grained and homogeneously distributed. Magnesium is known to suffer pitting corrosion when exposed to chloride solutions. To cause a high anodic dissolution, corrosion has been evaluated with potentiodynamic polarization in Ringer Acetate, HBSS and DMEM up to 500mV. The anodic current density within the active corrosion region and the current density and potential for passivation were used to compare the corrosion behavior. Corrosion in DMEM showed a tendency to passivation, Magnesium in HBSS only pseudo-passivated. Corrosion in Ringer-Acetate showed the highest current density without passivation up to 500mV. Corrosion morphology is discussed by using the pitting factor and size of corroded area. These values are correlated to the current density-potential curves. With decreased corroded area due to passivation the pitting factor increases. Corrosion behavior is compared to immersion tests.