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Corrosion behavior of Ti–8Al–1Mo–1V alloy compared to Ti–6Al–4V

Corrosion behavior of Ti–8Al–1Mo–1V alloy compared to Ti–6Al–4V,10.1016/j.matdes.2010.09.009,Materials & Design,M. Atapour,A. L. Pilchak,M. Shamanian,

Corrosion behavior of Ti–8Al–1Mo–1V alloy compared to Ti–6Al–4V  
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The corrosion behavior of Ti–8Al–1Mo–1V alloy was investigated in 3.5% NaCl and 5% HCl solutions. Corrosion properties of Ti–6Al–4V alloy were also evaluated under the same conditions for comparison. It was found that both Ti–8Al–1Mo–1V and Ti–6Al–4V alloys exhibited spontaneous passivity and low corrosion current densities in 3.5% NaCl solution. The potentiodynamic polarization curves obtained in 5% HCl solution revealed an active–passive transition behavior and similar corrosion rates for the examined alloys. However, the results of the weight loss experiments under accelerated immersion conditions (5M HCl at 35°C) indicated that Ti–8Al–1Mo–1V alloy exhibited inferior corrosion behavior compared to Ti–6Al–4V alloy. These results were confirmed by scanning electron microscopy (SEM) analysis of the samples after immersion tests which revealed that the β phase was corroded preferentially for both alloys, but to a larger extent in the case of Ti–8Al–1Mo–1V alloy.
Journal: Materials & Design - MATER DESIGN , vol. 32, no. 3, pp. 1692-1696, 2011
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