Preparation and Performance Characterization of Bioactive Coating on Magnesium Alloy

Investigation on Influencing Mechanism of Processing Parameters on Corrosion Resistance and Zinc Content of Anodic Coatings Developed on Magnesium Alloys in Near-Neutral Solutions

“…As shown in Figure 5c, the P 2p spectrum was fitted into two peaks, at 133.6 and 134.4 eV, assigned to PO4 3-and HPO4 2-, respectively [27]. The Zn 2p spectrum was fitted into two peaks located at 1023.5 and 1046.8 eV (Figure 5d), assigned to Zn3(PO4)2 [14,28]. The F 1s spectrum exhibited only one peak at 686.3 eV (Figure 5e), which was ascribed to MgF2 [29].…”

“…The coating components are especially easily manipulated by selecting the electrolyte composition and concentration [8][9][10] and electrical parameters [11]. Recently, MAO coatings have been functionalized by doping an appropriate amount of zinc (Zn) element [14][15][16]. As an important trace element, Zn distributes in all tissues and organs and participates in many enzymatic reactions [17].…”

“…For Mg alloys, MAO coatings are generally fabricated in strong alkaline solutions containing silicate [14], phosphate [21], and natural organic phytic acid (C 6 H 6 (H 2 PO 4 ) 6 , abbreviated as IP6 [22]. At present, Zn-doped MAO coatings on Mg alloys are rarely reported using a one-step method [23], and the reported coatings were developed in strong alkaline solutions [14][15][16].…”

“…For Mg alloys, MAO coatings are generally fabricated in strong alkaline solutions containing silicate [14], phosphate [21], and natural organic phytic acid (C 6 H 6 (H 2 PO 4 ) 6 , abbreviated as IP6 [22]. At present, Zn-doped MAO coatings on Mg alloys are rarely reported using a one-step method [23], and the reported coatings were developed in strong alkaline solutions [14][15][16]. Compared with alkaline solutions, near-neutral solutions cannot only achieve a higher final voltage and therefore better surface property, but also prolong solution service lifetime [22].…”

Investigation of In Vitro Cytocompatibility of Zinc-Containing Coatings Developed on Medical Magnesium Alloys

“…The biocompatibility of MAO coatings is influenced by many factors, including coating composition [ 31 , 37 ], corrosion resistance [ 37 ], wettability [ 39 ], and pore size [ 40 ]. Compared to the substrate, the fabricated samples by MAO treatment exhibit good cytocompatibility, which may be mainly attributed to their good degradation resistance and biocompatible chemical compositions.…”