Abstract
The correlation of corrosion resistance and the related oxide layer structure on Ti-6Al-4 V alloy following a thermal hydrogenation processing (THP) plus common industrial heat treatment was investigated in this study. It appears that better corrosion resistance can be achieved by applying a post-THP annealing treatment associated with a controlled oxidation reaction which can almost seal the oxygen diffusion paths leading to the formation of a much thinner (0.56 μm), but denser oxide layer than has been indicated in the literature. The effect of the THP treatment on the possible mechanism for this produced oxide layer formation is discussed. The microstructure characterization of the substrate is also analyzed.
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