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

Zhang, Wenxia; Zhu, Yuanyuan; Zhao, Rongfang; Zhang, Shufang; Lai, Xinying; Wang, Yibo; Yan, Zekun; Liu, Wenjing; Zhang, Rongfa

doi:10.3390/coatings12091286

Cited by 1 publication

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since magnesium is very active, it is difficult to develop zinc-containing coatings on magnesium alloys by one-step MAO treatment. At present, zinc-containing electrolytes, including Na 2 [ZnEDTA] [ 27 , 28 ] and ZnO particles [ 29 , 30 ], have been selected to fabricate MAO coatings. Additionally, some researchers used two-step methods to develop zinc-containing MAO coatings on magnesium alloys [ 37 , 38 ].…”

Section: Discussionmentioning

confidence: 99%

“…In our previous study [ 28 ], the influencing mechanism of the used electrolytes on corrosion resistance and the Zn amount of MAO coatings were revealed using an orthogonal experiment. Zinc is an amphoteric metal and in an acid solution, Zn 2+ ions are the main existing state.…”

Section: Discussionmentioning

confidence: 99%

“…In this study, the near-neutral solutions were used and, therefore, Zn 2+ and Zn(OH) 3 − or Zn(OH) 4 2− ions may be present in MAO solutions. In addition, the used solutions include strong chelating agents, such as EDTA 4− and phytic acid, which can promote Zn 2+ ions entering into MAO coatings [ 28 ]. With the enhanced Na 2 [ZnEDTA] concentrations, the Zn amount in MAO coatings continually increased, indicating that Zn 2+ ions entered into MAO coatings, mainly by diffusion.…”

Section: Discussionmentioning

confidence: 99%

“…Compared to titanium alloys, it is difficult to prepare zinc-containing MAO coatings by one-step MAO treatment on magnesium alloys, and the related reports in this field are scarce [ 27 , 28 , 29 , 30 , 31 ]. The influences of Zn-containing coatings fabricated by one-step MAO treatment on the osseogenic ability and degradation resistance of medical magnesium alloys are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Wang,

Liu,

Zhu

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

In a neutral solution, we investigated the effects of Na2[ZnEDTA] concentrations at 0, 6, 12, 18, and 24 g/L on surface morphology, chemical composition, degradation resistance, and in vitro cytocompatibility of micro-arc oxidation (MAO) coatings developed on WE43 (Mg-Y-Nd-Zr) magnesium alloys. The results show that the enhanced Na2[ZnEDTA] concentration increased the Zn amount but slightly decreased the degradation resistance of MAO-treated coatings. Among the zinc-containing MAO samples, the fabricated sample in the base solution added 6 g/L Na2[ZnEDTA] exhibits the smallest corrosion current density (6.84 × 10−7 A·cm−2), while the sample developed in the solution added 24 g/L Na2[ZnEDTA] and contains the highest Zn content (3.64 wt.%) but exhibits the largest corrosion current density (1.39 × 10−6 A·cm−2). Compared to untreated WE43 magnesium alloys, zinc-containing MAO samples promote initial cell adhesion and spreading and reveal enhanced cell viability. Coating degradation resistance plays a more important role in osseogenic ability than Zn content. Among the untreated WE43 magnesium alloys and the treated MAO samples, the sample developed in the base solution with 6 g/L Na2[ZnEDTA] reveals the highest ALP expression at 14 d. Our results indicate that the MAO samples formed in the solution with Na2[ZnEDTA] promoted degradation resistance and osseogenesis differentiation of the WE43 magnesium alloys, suggesting potential clinic applications.

show abstract