|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Surface Engineering for Improved Corrosion Resistance
||Corrosion Resistant Magnesium Surface Alloys by SMASH
||Krista Limmer, Joseph Labukas, Heather Murdoch
|On-Site Speaker (Planned)
A combination severe plastic deformation and powder processing treatment - surface mechanical alloying for specialized heterogeneity (SMASH) was used to modify the surface chemistry of magnesium in order to improve the corrosion resistance. Metals and metalloids that have recently been shown to reduce the cathodic reaction kinetics in magnesium alloys were mechanically alloyed into polycrystalline magnesium and the composition gradient, microstructure, and electrochemical behavior were characterized. This study examines the role of mechanical alloying in forming protective, corrosion resistant magnesium surface alloys. Surface chemistry and alloying depth was studied using Rutherford backscattering, energy dispersive spectroscopy, and x-ray photoelectron spectroscopy. Surface morphology was characterized using scanning electron microscopy and atomic force microscopy. The corrosion behavior was evaluated using potentiodynamic polarization and immersion in quiescent NaCl. In order to de-convolute the effect of grain size reduction, a pure Mg substrate was also treated for reference.
||Planned: Supplemental Proceedings volume