The hydrogen generation
rate was doubled as a result of galvanic corrosion after CNT
additions, and increased 3 times due to the porous Al matrix,
which had a large reaction area. In other words, increments of
the hydrogen generation rate are caused by the effects of the
60% of larger reaction area, and the 40% higher level of
galvanic corrosion. Finally, to achieve rapid hydrogen generation,
the 5 vol. % CNTs/Al composite with 20 MPa applied
stress was found to be the optimum CNTs/Al composite.