Biodegradable Magnesium Alloys Developed as Bone Repair Materials: A Review

Figure 3

Surface morphologies of ZK60 alloy coated by microarc oxidation at voltages of (a) 230 V, (b) 300 V, (c) 370 V, and (d) 450 V [29]. Some microcracks can be found on the 230 V coating, as marked by the black arrow in (a).

(a)

(b)

(c)

(d)