Table 4.

Corrosion rates of Fe, Fe-PEI1, Fe-PEI2, and Fe-PEI3 calculated from the weight-loss experiments in Hanks’ solution at 37 °C for 12 weeks.

CR [mm y −1]
Week of Immersion	4	8	12
Fe	0.004 ± 0.0015	0.005 ± 0.0030	0.005 ± 0.0034
Fe-PEI1	0.024 ± 0.0052	0.006 ± 0.0008	0.015 ± 0.0047
Fe-PEI2	0.148 ± 0.0420	0.037 ± 0.0113	0.021 ± 0.0209
Fe-PEI3	0.697 ± 0.0398	1.547 ± 0.0793	0.199 ± 0.0109