Corrosion may not have a deleterious effect on a material immediately but it affects its mechanical strength, physical appearance and it may lead to serious operational problems in future.

Vanadium (V) enhances the grain refining efficiency of the Al micro alloys when added at a weight percentage of 0.1% or more. Vanadium addition was also found to improves hardness, mechanical strength and surface quality of Al and its alloys.

The maximum decrease in corrosion rate was 38 % and the minimum was 11 % at 0.053 and 0.148 wt % vanadium addition respectively.

we can expect the small grain size caused by the grain refinement caused by the addition of Ti or V either alone or together, which results in increasing the number of grain boundaries and reducing the surface roughness, both of which reduces corrosion rate