Magnesium Alloy and Coating Corrosion

National Laboratory: 
Oak Ridge National Laboratory
Characterization Class: 
Extreme Environment Testing
Microscopy
Description: 

Oak Ridge National Laboratory is applying advanced characterization techniques to understand how magnesium alloy and coating composition/microstructure affect the formation of protective surface films in aqueous environments. Such an understanding can provide the basis for improving corrosion resistance. The effort has focused on characterization of film structure and chemistry via transmission electron microscopy (TEM) and neutron scattering techniques, as well as hydrogen and oxygen uptake during corrosion via isotopic tracer studies. Expertise also exists for alloy and coating design.

Capability Bounds: 

ORNL can work with a range of magnesium alloy and coating forms and corrosion phenomena, ranging from general corrosion to stress corrosion/H2-embrittlement to galvanic effects.

Unique Aspects: 

ORNL offers application of neutron scattering and isotopic tracers to magnesium corrosion. Extensive expertise is available for advanced ex- and in-situ TEM applied to corrosion.

Availability: 

ORNL’s facilities are available for collaboration.

Single Point of Contact: 

Name: Michael P. Brady, Ph.D.
Email: bradymp@ornl.gov
Phone: 865-574-5153

References: 
  1. Unocic, K. A. et al. Transmission Electron Microscopy Study of Aqueous Film Formation and Evolution on Magnesium Alloys. Journal of the Electrochemical Society, 161 (6), C302-C311 (2014).
  2. Brady, M.P. et al. Tracer Film Growth Study of Hydrogen and Oxygen from the Corrosion of Magnesium in Water. Journal of the Electrochemical Society, 161 (9), C395-C404, (2014).
  3. Brady, M.P. et al. Film Breakdown and Nano-Porous Mg(OH)2 Formation from Corrosion of Magnesium Alloys in Salt Solutions, Journal of The Electrochemical Society, 162 (4), C140-C149 (2015)
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