In-vitro corrosion inhibition mechanism of fluorine-doped hydroxyapatite and brushite coated Mg–Ca alloys for biomedical applications

Fabrication and corrosion behavior of Si/HA nano-composite coatings on biodegradable Mg–Zn–Mn–Ca alloy

“…In addition, Mg alloys possess low density, high specific strength, excellent castability and similar mechanical properties to cortical bone [3,4]. However, rapid corrosion of magnesium and the associated release of hydrogen gas in the physiological system (pH 7.4-7.6) is the main impediment to the clinical use of magnesium alloys, which needs to be addressed before the actual use of these implants in human [5][6][7]. In addition, the high degradation rate of Mg is another obstacle which is most deleterious during the period immediately following implantation [5,8].…”

Microstructural characterisation of air plasma sprayed nanostructure ceramic coatings on Mg–1%Ca alloys (bonded by NiCoCrAlYTa alloy)

“…The properties of low density, high specific stiffness, good machinability, high damping capacity, castability, weldability, and recyclability can be ascribed to magnesium and its alloys, which have many industrial applications in such industries as aerospace, electronics, and automotive [1][2][3][4]. However, the wider application of magnesium and its alloys is considerably restricted by their poor surface properties such as low hardness, poor corrosion resistance, and low wear resistance [5,6].…”

Corrosion resistance and cytocompatibility studies of zinc-doped fluorohydroxyapatite nanocomposite coatings on titanium implant

“…FHA shows high phase stability that is caused by OH − replacement by F − , which leads to contraction in the a-axis without changing the c-axis. This process causes crystallinity and stability enhancement [19]. Fluoride also promotes osteoblast proliferation and differentiation.…”

“…HA coating suffers from comparatively high dissolution rate in the biological environment of the human body, which is detrimental for long-term implant stability [19]. Fluorine doping is frequently employed to enhance thermal stability and biological properties of HA.…”