Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Table 3

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

Substrate	Average rate of hydrogen evolution (mL/cm^2/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