Table 3: Average rate of hydrogen evolution for various Mg alloys [60].

SubstrateAverage rate of hydrogen evolution (mL/cm2/day)

CP-Mg (Commercial Purity)26

ZE41 (~4 wt% Zn, ~1 wt% RE, 0.4-1 wt% Zr, ~0.005 wt% Fe, ~0.1 wt% Cu and ~0.01 wt% Ni)1.502

HP-Mg (High Purity)0.008

Mg1.0Zn (~1.0 wt% Zn, ~0.02 wt% Fe, <0.002 wt% Cu and <0.001 wt% Ni)0.280

AZ91 (~9 wt% Al, ~1 wt% Zn, ~0.005 wt% Fe, <0.002 wt% Cu, and <0.002 wt% Ni)0.068

Mg2Zn0.2Mn (~2 wt% Zn, ~0.2 wt% Mn, 0.0013 wt% Fe, <0.002 wt% Cu, <0.001 wt% Ni)0.012