Abstract
Corrosion-related defects in pure Al and AA 2037 Al alloy have been investigated by positron beam-based Doppler broadening energy spectroscopy. Defect profiles have been analyzed by measuring the S parameter as a function of incident positron energy up to 30 keV. When pure Al samples are immersed in 1M NaOH for various times, a significant increase in the S parameter near the surface is observed. This implies that the corrosion process involves the creation of defects and nanometer voids. In contrast, a significant decrease in the S parameter is observed after the corrosion of water-quenched Al alloy by the same method, which is interpreted as being a result of Cu enrichment near the metal-oxide interface layer.
Original language | English |
---|---|
Article number | 012065 |
Number of pages | 4 |
Journal | Journal of Physics: Conference Series |
Volume | 262 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 |
Event | 12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules, SLOPOS12, August 1, 2010 - August 6, 2010 - Magnetic Island, QLD, Australia Duration: 1 Jan 2011 → … |