Synthesis, Structural Characterization, Degradation Rate, and Biocompatibility of Magnesium-Carbonate Apatite (Mg-Co₃Ap) Composite and Its Potential as Biodegradable Orthopaedic Implant Base Material

Table 4

Characteristics of specimens on the biocorrosion test.

Specimen	Weight decrease (g)	Posttest pH	Corrosion rate (mpy)	Corrosion rate (mm/year)	Density (g/cm^3)
Pure Mg	0.0988	9.09	164.2405	4.1702	1.9661
Mg-5CA	0.2874	9.81	799.7770	20.3071	1.9575
Mg-10CA	0.2717	9.84	448.6945	11.3929	1.9791
Mg-15CA	0.1110	9.81	226.8837	5.7608	2.1320

Notes: .