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. 2015 Mar 17;16(3):6113–6123. doi: 10.3390/ijms16036113

Figure 2.

Figure 2

Schematic illustration of the reaction mechanism of calcium phosphate coatings on ZK60 substrate. (1) Anode reaction; (2) Cathode reaction; (3) Transformation of H2PO4− to PO43−; and (4) HA phase producing process.