1. Materials Engineering, School of Mechanical and Mining Engineering; The University of Queensland; Brisbane Qld 4072 Australia
2. Queensland Centre for Advanced Materials Processing and Manufacturing (AMPAM); The University of Queensland; Brisbane Qld 4072 Australia
3. Oak Ridge National Lab; Corros Sci & Technol; Oak Ridge TN 37831-6156 USA
4. GM China Science Lab; 56 Jinwan Road; Pudong Shanghai 201206 China
5. Defence Materials Technology Centre; The University of Queensland; Brisbane Qld 4072 Australia