In Vitro Degradation Behaviors of Manganese-Calcium Phosphate Coatings on an Mg-Ca-Zn Alloy

Figure 3

SEM surface morphology (a)–(e): phosphate coating obtained from calcium phosphating solution containing 0, 0.01, 0.03, 0.05, and 0.07 mol/L Mn²⁺ content on Samples 1–5.

(a)

(b)

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(d)

(e)