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The effect of a non-chromate deoxidiser (bromate–nitric acid) on AA2024-T3 has been examined by SEM, TEM/EELS and XPS. At low temperatures (20°C) the deoxidiser removed all intermetallics but had little effect on the surface oxide. At 40°C, attack on the intermetallics was again extensive but there was also evidence of attack on the surface oxide covering the matrix after 10min of immersion, leaving...
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