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Corrosion of pure aluminium and aluminium alloy: A comparative study using a slow positron beam


Reference:

Wu, Y. C., Li, P. H., Xue, X. D., Wang, S. J., Kallis, A., Coleman, P. G. and Zhai, T., 2011. Corrosion of pure aluminium and aluminium alloy: A comparative study using a slow positron beam. Journal of Physics: Conference Series, 262 (1), 012065.

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Official URL:

http://dx.doi.org/10.1088/1742-6596/262/1/012065

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.

Details

Item Type Articles
CreatorsWu, Y. C., Li, P. H., Xue, X. D., Wang, S. J., Kallis, A., Coleman, P. G. and Zhai, T.
DOI10.1088/1742-6596/262/1/012065
DepartmentsFaculty of Science > Physics
RefereedYes
StatusPublished
ID Code23210
Additional Information12th International Workshop on Slow Positron Beam Techniques for Solids, Surfaces, Atoms and Molecules, SLOPOS12. 1-6 August 2010. Magnetic Island, QLD, Australia.

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